Consulta: "Maize"
Registros recuperados: 3.385
Máximo de registros impressos: 2500
Data/hora: 08/05/2024 16:03:47

1977 Corn and sorghum insects annual report
Provedor de dados: 106
Autores: Boonsom Meksongsee; Panya Poonyathawon; Ocha Prachuabmoh; Auranuj Kongkanjana; Arunee Wongkobrat; Malee Chawanapong; Uthai Sangkasuwan; Watchara Wongkumhang; Thalearngsak Weerawooth.
11 tables
Palavras-chave: Corn; Maize; Sorghum; Sweet corn; Pest insects; Borers; Chilo sacchariphagus; Aphids; Armyworms; Mythimna separata; Ostrinia furnacalis; Life cycle; Infestation; Insecticides; Pesticides; Insect control; Yields; Losses; ข้าวโพด; ข้าวฟ่าง; หนอนเจาะลำต้น; เพลี้ยอ่อน; หนอนเจาะฝัก; แมลงที่เป็นประโยชน์; สารกำจัดแมลง.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3930

1992 on-farm research on corn
Provedor de dados: 106
Autores: Pipat Weerathaworn; Prataun Klinto; Somsak Rodlong; Rachain Thiraporn; Kosol Kirdpoksub; Somchai Lim-aroon; Prapon Boonrumpun; Sukum Chotechuangmanirat; Somchai Potisan.
5 tables
Palavras-chave: Corn; Maize; On farm research; Varietal trial; Commercial hybrid trial; NPK fertilizer trial; Verification trial; ข้าวโพด; การทดสอบระดับไร่กสิกร; ผลผลิต; ลูกผสม; ปุ๋ย; ไนโตรเจน; ฟอสฟอรัส; โปแตสเซียม.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4501

28-Homobrassinolide alleviates oxidative stress in salt-treated maize (Zea mays L.) plants
Provedor de dados: 61
Autores: Arora,Nitika; Bhardwaj,Renu; Sharma,Priyanka; Arora,Hardesh K.
Tipo: Info:eu-repo/semantics/other
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200007

3DMCAP documentation: release 1.0.
Provedor de dados: 14
Autores: SANTOS, T. T.
This document is the user manual of a tool, 3DMCAP, developed by our Automation Group for photogrammetry using a single camera and a notebook computer. Our staff was able to use it to recover the three-dimensional structure of plants in greenhouses and in open fields, including vines, coffee trees, maize, sunflower, soybean eucalyptus trunks.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Manual do usuário; Ferramenta 3DMCAP; Imagem digital; Visão computacional; Fotogrametria; Photogrammetry; Digital images; Image analysis; Computer vision.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1102027

A 1998 SOCIAL ACCOUNTING MATRIX FOR MALAWI
Provedor de dados: 31
Autores: Chulu,   Osten; Wobst,   Peter.
The last few years have seen a proliferation of attempts by various institutions to create a framework that would enable analysts to have a broad overview of all transactions in the Malawian economy. A first attempt was made by Lodh and Chulu (1994) to construct a macro accounting framework using data from the National Statistical Office's 1990-1991 Household Expenditure and Small Scale Economic Activities Survey and the National Sample Survey of Agriculture complemented by other data sets such as the Government Budget Estimates, National Accounts and External Trade Statistics. This framework consisted of 9 sectors using 1987 as the base year. However, this framework was lacking in detail such that it was extremely limited in its usefulness as a basis for...
Tipo: Working or Discussion Paper
Palavras-chave: International Development.
Ano: 2001
URL: http://purl.umn.edu/16282

A ação dos gens gametofíticos com referência especial ao milho
Provedor de dados: 43
Autores: Brieger,F. G.
1) The first part deals with the different processes which may complicate Mendelian segregation and which may be classified into three groups, according to BRIEGER (1937b) : a) Instability of genes, b) Abnormal segregation due to distur- bances during the meiotic divisions, c) obscured segregation, after a perfectly normal meiosis, caused by elimination or during the gonophase (gametophyte in higher plants), or during zygophase (sporophyte). Without entering into detail, it is emphasized that all the above mentioned complications in the segregation of some genes may be caused by the action of other genes. Thus in maize, the instability of the Al factor is observed only when the gene dt is presente in the homozygous conditions (RHOADES 1938). In another...
Tipo: Info:eu-repo/semantics/article
Ano: 1945
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100009

A análise de fatores na predição de ganhos por seleção em milho (Zea mays L.)
Provedor de dados: 1
Autores: Granate, Maria José; EPAMIG; Cruz, Cosme Damião; UFV; Cecon, Paulo Roberto; UFV; Pacheco, Cleso Antônio Patto; EMBRAPA.
Apresenta-se um histórico e várias utilizações agronômicas da Análise de Fatores, em especial a sua utilização na predição de ganhos por seleção. Foram avaliadas 166 famílias de meios irmãos de milho pipoca no ano agrícola de 1997-1998, em Sete Lagoas, Estado de Minas Gerais, no Centro Nacional de Pesquisa de Milho e Sorgo. A predição dos ganhos por seleção, baseada nos escores obtidos através da análise de fatores, possibilitou ganhos nos caracteres principais. Os escores foram utilizados para a predição de ganhos por seleção direta e indireta e uso de vários índices de seleção. A análise de fatores foi considerada uma técnica multivariada útil para a predição de ganhos por seleção, em substituição do método tradicional, ou complementando as técnicas de...
Palavras-chave: 5.00.00.00-4 Ciências Agrárias Zea mays L.; Melhoramento; Diferencial de seleção; Índices de seleção; Análise de fatores; Métodos multivariados 5.00.00.00-4 Ciências Agrárias.
Ano: 2001
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2631

A AVICULTURA INDUSTRIAL DE CORTE NO NORDESTE: ASPECTOS ECONÔMICOS E ORGANIZACIONAIS
Provedor de dados: 31
Autores: Evangelista,   Francisco Raimundo; Nogueira Filho,   Antonio; Oliveira,   Alfredo Augusto Porto.
Este artigo resume uma pesquisa mais ampla desenvolvida em 2006/2007, com o objetivo de “divulgar informações recentes sobre a avicultura nordestina, [destacando] suas fortalezas e vulnerabilidades”. A abordagem adotada foi a dos agronegócios, tendo-se utilizado informações primárias obtidas em entrevistas junto aos seus vários atores, complementadas com dados secundários.  A principal vulnerabilidade dos estados da Bahia, Pernambuco e Ceara (focos deste artigo) está no suprimento de milho e soja para as rações. Os cultivos dos cerrados nordestinos (Bahia, Maranhão e Piauí) vêm contribuindo para reduzir o problema, mas a infra-estrutura de transporte ainda não é a ideal e, às vezes, há necessidade de recorrer às importações.  A produção independente é...
Tipo: Conference Paper or Presentation
Palavras-chave: Nordeste; Avicultura Industrial; Sistema Agroindustrial do Frango; Brazilian northeast; Industrial Poultry; Commodity Systems; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/110031

A bioüzemanyag-gyártás nemzetközi összefüggései
Provedor de dados: 31
Autores: Popp,   Jozsef.
A dráguló olajár „felszínre hozta” a fosszilis energiahordozók környezetbarát energiahordozókkal való kiváltásának problémáját. Az olajkészletek korlátozottsága mellett a bizonytalan kitermelés és a folyamatosan növekvő árak a bioüzemanyagok felé irányítják a politikai döntéshozók és a befektetők figyelmét. Az olajimportőr országoknak a bioüzemanyag-gyártás nyersanyagainak hazai termelése lehetővé teszi importköltségeik visszafogását, az üvegházhatást okozó gázok kibocsátásának csökkentését, valamint a mezőgazdasági termelők jövedelem-színvonalának javítását. A bioüzemanyagok elterjedése ugyanakkor enyhíti a kapacitása határán dolgozó olajfinomító ipar üzemanyag-ellátási terheit is, ami jelentős mértékben hozzájárul(t) az üzemanyagárak emelkedéséhez. Ma...
Tipo: Journal Article
Palavras-chave: Bioüzemanyag; Közlekedés; Környezetvédelem; Energiaellátás; Élelmiszer-termelés; Biofuel; Transportation; Environment; Energy supply; Food production; Agricultural and Food Policy; Land Economics/Use.
Ano: 2007
URL: http://purl.umn.edu/57723

A CONTRIBUIÇÃO DA EXPEDIÇÃO CAMINHOS DO CAMPO NO DIMENSIOAMENTO DA SAFRA DE SOJA E MILHO PARANAENSE E O POTENCIAL DE EXPANSÃO DE ÁREA DO CENTRO-NORTE DO BRASIL
Provedor de dados: 31
Autores: Mafioletti,   Robson; Bragagnolo,   Cassiano; Sbrissia,   Gustavo Fischer; Ferreira,   Giovani; Loyola,   Pedro.
O trabalho teve como objetivo estimar a safra paranaense, que somando as culturas da soja e do milho foi recorde chegando em 2007/08 a 21,2 milhões de toneladas, aliado a isso tem-se uma situação favorável de preços internacionais, que gera resultados positivos para o setor produtivo e permite a recuperação do setor que passou por anos complicados por problemas climáticos e de preços. A estimativa da safra foi realizada com uma amostra de dados que representam 78% da área de soja e 61% da área de milho do Estado do Paraná. Quanto as questões relacionadas a biotecnologia – soja transgênica – RR, os resultados foram os esperados, de que essa é mais uma tecnologia disponível ao produtor e esta evoluindo para ser cada vez mais competitiva com a soja...
Tipo: Conference Paper or Presentation
Palavras-chave: Soja; Milho; Expedição; Preços; Biotecnologia; Soybean; Corn; Expedition; Prices; Biotecnology; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/109453

A cultura do milho e sua importância nos sistemas de produção de Mato Grosso do Sul.
Provedor de dados: 14
Autores: TEIXEIRA, M. do R. de O.
bitstream/item/65193/1/ID-15142.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Congresso; Brasil; Mato Grosso do Sul; Maize; Production; Congresses.; Cerrado; Milho; Produção; Zea Mays.; Brazil.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/242143

A cultura do milho na Amazônia.
Provedor de dados: 14
Autores: PEREIRA, O. G.
bitstream/item/69744/1/IPEAN-Fitotecnia1.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cultivo; Melhoramento genetico; Brasil; Maize; Cultivation; Genetic breeding; Cultural practices; Yield; Harvest.; Colheita; Milho; Pesquisa; Polinização; Pratica Cultural; Produtividade.; Plantio; Amazonia; Pollination; Planting; Research.
Ano: 1971
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376203

A decade of technological innovation in crop-livestockforest integration at Fazenda Boa Vereda.
Provedor de dados: 14
Autores: PACHECO, A. R.; NICOLI, C. M. L.; CALIL, F. N.; REIS, C. F.; MORAES, A. da C.
In recent times, research has been expanded on production systems that integrate agriculture, livestock and forestry, in order to seek the intensification of the production system and guarantee sustainability. In this sense, in 2007, the motivation for implementing the crop-livestock-forest integration system (CLFi) in Fazenda Boa Vereda appeared. At that time, the profitability of the cattle ranching, the base activity of the farm, was very low (60 kg ha-1 year-1) and there was disinterest for the then more attractive and profitable alternative that was the sugarcane plantation. Thus, the objective of this work is to present the results obtained during a decade of experience in the implementation and conduction of the CLFi system and to highlight its...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Inovação; Transferência de tecnologia.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1080529

A determinação dos números de indivíduos mínimos necessários na experimentação genética
Provedor de dados: 43
Autores: Brieger,F. G.
The main object of the present paper consists in giving formulas and methods which enable us to determine the minimum number of repetitions or of individuals necessary to garantee some extent the success of an experiment. The theoretical basis of all processes consists essentially in the following. Knowing the frequency of the desired p and of the non desired ovents q we may calculate the frequency of all possi- ble combinations, to be expected in n repetitions, by expanding the binomium (p-+q)n. Determining which of these combinations we want to avoid we calculate their total frequency, selecting the value of the exponent n of the binomium in such a way that this total frequency is equal or smaller than the accepted limit of precision n/pª{ 1/n1 (q/p)n +...
Tipo: Info:eu-repo/semantics/article
Ano: 1947
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761947000100012

A Disponibilidade de Produtos e o Poder de Compra dos Consumidores: Farinhas de Milho e Arroz
Provedor de dados: 31
Autores: SIMA,   Technical Team.
Resultados das investigações do Projecto de Segurança Alimentar em Moçambique MAP-Direcção de Economía-Dpto. Estatística
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Q18.
Ano: 1997
URL: http://purl.umn.edu/55202

A Disponibilidade de Produtos e o Poder de Compra dos Consumidores: Grãos de Milho e Arroz
Provedor de dados: 31
Autores: SIMA,   Technical Team.
Resultados das investigações do Projecto de Segurança Alimentar em Moçambique MAP-Direcção de Economía-Dpto. Estatística
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Q18.
Ano: 1997
URL: http://purl.umn.edu/55201

A Farm Gate-to-Consumer Value Chain Analysis of Kenya’s Maize Marketing System
Provedor de dados: 31
Autores: Kirimi,   Lilian; Sitko,   Nicholas J.; Jayne,   Thomas S.; Karin,   Francis; Muyanga,   Milu; Sheahan,   Megan; Flock,   James; Bor,   Gilbert.
Based on the findings of this study, the following actions are proposed for consideration by the Government of Kenya: 1. Raise public investment in maize seed breeding and agronomic research to make it possible for improvements in smallholder crop productivity. Based on research evaluating the returns to alternative investments in agriculture, public expenditures in maize seed breeding and agronomy may constitute the single most important investment to promote broad-based productivity growth and poverty reduction in Kenya. 2. Explore options for improving public and private extension programs to enable farmers to adopt improved farm technologies generated from point 1. 3. Examine options for bringing more land in Kenya under potential cultivation by...
Tipo: Working or Discussion Paper
Palavras-chave: Kenya; Maize; Marketing; Food security; Agricultural and Food Policy; Food Security and Poverty.
Ano: 2011
URL: http://purl.umn.edu/101172

A Global Model for Agriculture and Bioenergy: Application to Biofuel and Food Security in Peru and Tanzania
Provedor de dados: 31
Autores: Elbehri,   Aziz; McDougall,   Robert; Horridge,   Mark.
This paper describes a global model for agriculture and bioenergy (GLOMAB) that incorporates biomass, biofuels and bioelectricity sectors into the GTAP-Energy model by expanding the global GTAP database, production and consumption structures. Biofuels are separated between first- generation (sugar ethanol, starch ethanol) and second- generation (cellulosic ethanol) biofuels and associated biomass feedstocks (maize, sugar cane, crop residues, woody biomass). Beside biofuels, the model also incorporates bioelectricity (as separate form conventional electricity) which competes for the same biomass feedstocks with cellulosic ethanol sector (agricultural residues, woody biomass). With this broad-based representation of the bioenergy system likely to prevail...
Tipo: Conference Paper or Presentation
Palavras-chave: Biofuels; Renewable Energy; Biomass; Agricultural Markets; Computable General Equilibrium (CGE); Food Security and Poverty; Resource /Energy Economics and Policy; C68; Q18; Q42; R14.
Ano: 2009
URL: http://purl.umn.edu/51914

A influência dos pigmentos amarelo -laranja de vários alimentos na coloração da gema de ôvo de galinha
Provedor de dados: 43
Autores: Graner,E. A.
The effect of different feeds in comparison with that of maize grains on the egg yolk color was observed. It was found that deep orange and yellow orange maize give satisfactory coloration to the yolk, respectively orange and yellow. The most intense color was observed when green feed was used in combination with deep orange maize. Green feeds as chicory, alfafa, cabbage, welsh onion and banana leaves and alfafa or chicory meal proved to be good in giving orange color to the yolk. Yellow yolk was obtained when Guinea grass or carica fruit were used in the ration. Carrot and beet without leaves did not give satisfactory color to the egg yolk. The observations with other feeds are being continued.
Tipo: Info:eu-repo/semantics/article
Ano: 1947
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761947000100021

A influência dos pigmentos amarelo-laranja da semente de milho na coloração da gema de ovo de galinha
Provedor de dados: 43
Autores: Graner,E. A.
The effect of carotenoid pigments on the egg yolk color was studied in this paper. Three types of maize of known genetical constitution were used: Cateto, with deep orange endosperm; Armour, with yellow-orange endosperm and Cristal, with white endosperm. The carotenoid pigments of the two colored maizes were analysed: the total and both the active parts in relation to vitamin A and the zeaxanthin part showed to be practically double in the deep orange corn. The color of the yolk was orange when the ration had the deep orange corn and yellow in the case of the yellow-orange corn. The increase in shade was proportional to the amount of pigment present in the grains. If green feeds is added to the ration with white corn, the yolk becomes yellow or orange,...
Tipo: Info:eu-repo/semantics/article
Ano: 1946
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761946000100026

A KUKORICATERMESZTÉS HATÉKONYSÁGÁNAK ÉS EREDMÉNYESSÉGÉNEK VIZSGÁLATA 2003-2006 ÉVI TESZTÜZEMI ADATOK ALAPJÁN
Provedor de dados: 31
Autores: Barkaszi,   Levente.
Its importance is going to last or even increase in the coming years. That is why the rational and efficient utilisation of the inputs devoted to maize production is equally important from the point of view of the environment and the profit for the farmers. For analysing the question I have examined the production data of Hungarian FADN farms producing more than 5 hectares of maize during 2003-2006. This way taking the four years’ data I have concluded the analysis of 2982 individual and 761 corporate farms. For analysis purposes I have calculated the total direct cost spent on the production of 1 ton of grain maize and grouped the farms into 5 even groups according to this. At each group I have examined the main inputs in connection with maize production,...
Tipo: Book
Palavras-chave: Ráfordítás felhasználás; Költségszerkezet; Herbicid felhasználás; Szakértelem; Input use; Cost structure; Herbicide use; Importance of knowledge; Agribusiness; Crop Production/Industries; Production Economics.
Ano: 2008
URL: http://purl.umn.edu/43313

A lagarta-do-cartucho na cultura do milho.
Provedor de dados: 14
Autores: CRUZ, I.
bitstream/item/37439/1/circ-21.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Lagarta do cartucho; Maize; Pest.; Milho; Praga; Spodoptera Frugiperda; Zea Mays.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/475779

A MAGYARORSZÁGI RÉGIÓK BÚZA- ÉS KUKORICATERMELÉSÉNEK FŐBB JELLEMZŐI
Provedor de dados: 31
Autores: Hingyi,   Hajnalka.
A vizsgálatok feltárták az egyes régiók gabonatermelése közti különbsége-ket, különös tekintettel a vetésterületek, hozamok és az árbevételek alakulására. Megállapítást nyert, hogy: • A legjelentősebb búzatermelő régióink a Dél-Dunántúl és a Dél-Alföld. Mindkét régióban az összes betakarított termésmennyiség és a termésátlag is meghaladta a többi régió eredményeit a vizsgált időszakban.   • A kukorica esetében is a Dél-Dunántúli Régió a meghatározó, 2004-ben 11%-kal többet takarítottak be az Észak-Alföld termelésénél és közel hétszer többet a legalacsonyabb terméseredményű Közép-Magyaroszágénál. A termésát-lagok szintén a dél-dunántúli régióban voltak a legmagasabbak a vizsgált idő-szakban. • A régiók termésátlagai – az egyes régiók eltérő...
Tipo: Journal Article
Palavras-chave: Régió; Búza; Kukorica; Rekordtermés; Árbevétel - regions; Wheat; Maize; Record harvest; Income; Agribusiness; Crop Production/Industries; Demand and Price Analysis.
Ano: 2005
URL: http://purl.umn.edu/54334

A mancha por cercospora em milho.
Provedor de dados: 14
Autores: FERNANDES, F. T.; OLIVEIRA, E. de.
bitstream/item/53456/1/ct-16.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize; Diplodia macrospora; Disease; Fungus; Control.; Doença; Fungo; Milho; Zea Mays.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484065

A mathematical approach estimating source and sink functioning of competing organs
Provedor de dados: 26
Autores: Kang, M.Z.; De Reffye, P.
Plant growth and development depend on both organogenesis and photosynthesis. Organogenesis sets in place various organs (leaves, internodes, fruits, roots) that have their own sinks. The sum of these sinks corresponds to the plant demand. Photosynthesis of the leaves provides the biomass supply (source) that is to be shared among the organs according to their sink strength. Here we present a mathematical model – GreenLab – that describes dynamically plant architecture in a resource-dependent way. The source and sink functions of the various organs control the biomass acquisition and partitioning during plant development and growth, giving the sizes and weights of organs according to their position in the plant architecture. Non-linear least-square method...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1372

A modelling approach to genotype × environment interaction: genetic analysis of the response of maize growth to environmental conditions
Provedor de dados: 26
Autores: Sadok, W.; Boussuge, B.; Welcker, C.; Tardieu, F.
Expansive growth of organs has a very large genotype × environment (G×E) interaction. Maximum leaf expansion rate observed in the absence of stress and of evaporative demand has a genetic variability which is usually smaller than environmental effects. The mechanisms driving the reduction in leaf growth rate under stress, namely changes in cell division rate, in cell-wall mechanical properties and in turgor, and their signalling pathways, interact in such a way that a bottom-up approach from genes to the G×E interaction cannot be envisaged. We propose an approach combining modelling and genetic dissection of model parameters. Three genotype-dependent parameters are considered for analysing the G×E interaction for leaf elongation rate of maize. The maximum...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1297

A NEW APPROACH FOR ASSESSING THE COSTS OF LIVING WITH WILDLIFE IN DEVELOPING COUNTRIES
Provedor de dados: 31
Autores: Sutton,   William R.; Larson,   Douglas M.; Jarvis,   Lovell S.
The costs of living with wildlife are assessed using Namibian subsistence farmers’ willingness to pay (WTP) for deterrents to attacks on crops and livestock as a measure of damage costs. A utility-theoretic approach jointly estimates household WTP for deterrent programs in two “currencies,” maize and cash. This has a double payoff. Use of a noncash staple increases respondent comprehension and provides more information about preferences, improving the accuracy of results. The household shadow value of maize is also identified. Significant costs from living with elephants and other types of wildlife are demonstrated. Compensation for farmers may be warranted on equity and efficiency grounds. Uncontrolled domestic cattle generate even higher costs to farmers...
Tipo: Working or Discussion Paper
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/11951

A PROBIT ANALYSIS OF WOMEN FARMERS’ ACCESS TO FARM LAND AND CREDIT IN THE NORTHERN PROVINCE
Provedor de dados: 31
Autores: Mokoena,   M.R.; Mekuria,   Mulugetta; Ngqaleni,   M.
Northern Province is predominantly a rural region where agriculture is the dominant sector and plays an important role in the provincial economy. Women are the majority of the poor living in these rural areas and depend heavily on farming. But their agricultural productivity is below potential as they don’t have access to productive assets such as land and credit. This study based on a farm survey undertaken in the seven districts in the former Lebowa homeland in the Northern Province, attempts to identify factors which determine women farmers’s access to more farming land and credit facilities. The results show that most of the women are not satisfied with the size of the land which they own and they have never used farming credit. The probit analysis...
Tipo: Journal Article
Palavras-chave: Agricultural Finance; Land Economics/Use.
Ano: 1997
URL: http://purl.umn.edu/54979

A Realidade a Cerca da Subida de Preços: A Dinâmica dos Preços de Alimentos em Moçambique e as Implicações Políticas.
Provedor de dados: 31
Autores: Mabota,   Anabela; Paulo,   Antonio M.; Balate,   Argentina; Donovan,   Cynthia; Abdula,   Danilo Carimo; Mlay,   Gilead; Bata,   Olanda.
Resultados das Investigações do SIMA- Departamento de Estatística e Departamento de Análise de Políticas MINAG - Direcção de Economia – Dpto. Estatística
Tipo: Report
Palavras-chave: Food security; Food policy Mozambique; Demand and Price Analysis; Q18.
Ano: 2008
URL: http://purl.umn.edu/55257

A Regional Analysis of Maize Biological Diversity in Southeastern Guanajuato, Mexico
Provedor de dados: 31
Autores: Gomez,   Jose Alfonso Aguirre; Bellon,   Mauricio R.; Smale,   Melinda.
Four environments with contrasting potential for agricultural productivity and infrastructure development were identified in Guanajuato State, Mexico, to test hypotheses about the relationship of maize biological diversity to the region's potential for agricultural productivity and infrastructure development. Samples of all types of maize grown by a random sample of farmers were collected from each environment. The maize samples were classified by race, racial mixture, or type of 'creolized' or improved variety. Landraces were the dominant maize class in all four environments; the use of improved varieties was negligible. Several diversity indices were calculated, and no statistically significant differences were apparent between the environments with the...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/7671

A REVIEW OF FACTORS RESPONSIBLE FOR SORGHUM AND MAIZE CROP PATTERN CHANGES IN MOZAMBIQUE
Provedor de dados: 31
Autores: Mucavele,   Firmino Gabriel.
Agriculture surveys and literature establish that sorghum was of the most important food crops in Mozambique.  A large number of farmers have been shifting production gradually from sorghum to maize production despite its susceptibility to drought.  The general objective of this study is to identify the factors responsible for decline of sorghum production in Mozambique.  Comparative analysis between sorghum and maize are done.  Enterprise budgets and break even analysis for both sorghum and maize are presented and discussed.  Supply functions for sorghum and maize from 1950 to 1985 are estimated.  It is concluded that the major factors responsible for sorghum production decline are the lack of security in the country side, drought during the last ten...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries.
Ano: 1988
URL: http://purl.umn.edu/11124

A Review of Fixed Bed Gasification Systems for Biomass
Provedor de dados: 111
Autores: Sangeeta Chopra; Anil K Jain.
The gasification of biomass into useful fuel enhances its potential as a renewable energy resource. The fixed bed gasification systems are classified as updraft, Imbert downdraft, throatless downdraft, crossdraft and two stage gasifiers. Updraft gasifiers are suitable for gasification of biomass containing high ash (up to 15 %) and high moisture content (up to 50 %) and generate producer gas having high tar content (50–100 g/Nm3). The high temperature (830 oC) air gasification of biomass in updraft gasifiers increase the lower calorific value of producer gas and reduce the tar content. The updraft gasifiers have been used for gasification of bark, wood blocks, chips and pellets, straw, maize cobs, refuse derived fuel (RDF), and waste pellets with air and...
Ano: 1969
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/960

A search for RFLP markers to identify genes for aluminum tolerance in maize
Provedor de dados: 54
Autores: Torres,Giovana A.; Parentoni,Sidney N.; Lopes,Maurício A.; Paiva,Edilson.
The objective of this study was to identify restriction fragment length polymorphism (RFLP) markers linked to QTLs that control aluminum (Al) tolerance in maize. The strategy used was bulked segregant analysis (BSA) and the genetic material utilized was an F2 population derived from a cross between the Al-susceptible inbred line L53 and Al-tolerant inbred line L1327. Both lines were developed at the National Maize and Sorghum Research Center - CNPMS/EMBRAPA. The F2 population of 1554 individuals was evaluated in a nutrient solution containing a toxic concentration of Al and relative seminal root length (RSRL) was used as a phenotypic measure of tolerance. The RSRL frequency distribution was continuous, but skewed towards Al-susceptible individuals....
Tipo: Info:eu-repo/semantics/article
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000300017

A Simulation Model of Combined Biogas, Bioethanol and Protein Fodder Co-Production in Organic Farming
Provedor de dados: 21
Autores: Oleskowicz-Popiel, Piotr; Thomsen, Mette Hedegaard; Thomsen, Anne Belinda; Schmidt, Jens Ejbye.
In order to evaluate new strategies for the production of  renewable energy within sustainable organic agriculture, a process-simulation model for a 100 ha organic farm was developed. Data used for the model was obtained from laboratory trials, literature data, consultancy with experts, and results from the BioConcens project (http://www.bioconcens.elr.dk). Different design approaches were evaluated in order to establish the most suitable configuration. Rye grains, clover grass silage, maize silage, whey and cattle manure were selected as raw materials for co-production of fuels, feed and fertilizer at the organic farm, based on the fact that crops grown in organic agriculture act as key carbon sources whereas manure and whey were applied primarily as the...
Tipo: Journal paper
Palavras-chave: Technology assessment; Post harvest management and techniques.
Ano: 2009
URL: http://orgprints.org/19015/4/19015.pdf

A tápanyagpótlás és gyomirtás értékelése a helyspecifikus növénytermelési technológiában
Provedor de dados: 31
Autores: Lencses,   Eniko.
A Szent István Egyetem Józsefmajori tangazdaságának relatív jó talajadottságokkal rendelkező tábláiban a precíziós tápanyagpótlás alkalmazásával akár hektáronként 60 kg nitrogénhatóanyag-megtakarítás is elvárható a konvencionális technológiához képest. A precíziós tápanyagpótlási technológiával, a vizsgált táblák 50%-ánál tapasztalható anyagköltség-megtakarítás. Az anyagmegtakarítás mellett célszerű számolni a működési költségek növekedésével. A Szegedi Gabonakutató Kft. segítségével végzett szántóföldi kísérletek adatai alapján megállapítható, hogy kukoricatermelésnél 48,85% őszi gyomborítottság felett ökonómiailag indokolt a precíziós gyomirtás.   -----------------------------------   By applying precision nutrient supplementation rather instead of...
Tipo: Journal Article
Palavras-chave: Precíziós gazdálkodás (növényvédelem; Tápanyagpótlás); Jövedelem; Árváltozás; Precision farming (plant protection; Nutrient supplementation); Income; Price change; Crop Production/Industries; Farm Management; Production Economics.
Ano: 2009
URL: http://purl.umn.edu/92532

A Unified Approach to the Estimation of Demand for Improved Seed in Developing Agriculture
Provedor de dados: 31
Autores: Langyintuo,   Augustine S.; Hamazakaza,   Petan; Nawale,   Edah; Mekuria,   Mulugetta.
This paper proposes a new approach for estimating the demand for seed within a developing country context where only improved seeds are sold but adoption rates for improved varieties low. A farmer views an improved seed firstly as a derived input embodying production attributes and secondly, as a technology embodying consumption characteristics. He therefore jointly decides on its adoption and the quantity of seed required to plant a predetermined area. Drawing on the theory of demand for consumption goods characteristics and production input attributes, this paper specified and estimated non-separable household demand and consumption models using data collected from 300 farm households in Zambia during the 2003/04 crop season. The estimated results...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural household model; Consumer goods characteristics; Production inputs; Technology attributes; Non-separability; Censored equations; Zambia; Crop Production/Industries; C21; D1; O3; Q12; Q16.
Ano: 2006
URL: http://purl.umn.edu/25332

A Unified Methodology for Estimating the Demand for Improved Seed at the Farm Level in Developing Agriculture
Provedor de dados: 31
Autores: Langyintuo,   Augustine S.; Mazuze,   Feliciano M.; Chaguala,   P.A.; Buque,   I.A.
This paper proposes a novel approach for estimating farm level seed demand in developing countries. In principle, a farmer views an improved seed as a derived input embodying production attributes and a technology embodying consumption characteristics and jointly decides on its adoption and the quantity of seed required to plant a predetermined area. Drawing on the theory of demand for consumption goods characteristics and production input attributes, this paper specified and estimated improved seed adoption and demand models simultaneously using data collected from 300 randomly selected farm households in the Manica, Sussundenga and Chockwé districts of Mozambique in the 2003/04 crop season. The demand model results suggest that adoption rate, household...
Tipo: Conference Paper or Presentation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2006
URL: http://purl.umn.edu/21091

Abschätzung der Wertschöpfungspotenziale im ländlichen Raum durch Biokraftstoffe am Beispiel Nordrhein-Westfalens
Provedor de dados: 31
Autores: Breuer,   Thomas; Holm-Muller,   Karin.
To enhance the use of biofuels is stated priority of EU and German energy policy. Reasons given for this priority inter alia include positive income effects for the rural areas. This paper uses the example of North Rhine-Westphalia to investigate rural areas’ possibilities to profit from the added value of bio fuel production. It is shown that the main channel of income generation is based on stabilized demand for agricultural products. Taking into account recent policy shifts in Germany there remain few chances to participate in the added value of downstream production steps. In addition, due to considerable support for biogas plants maize production considerably reduces areas consecrated to bio fuel production.
Tipo: Journal Article
Palavras-chave: Biofuel; Development of rural areas; Income effects; Resource /Energy Economics and Policy; Community/Rural/Urban Development.
Ano: 2007
URL: http://purl.umn.edu/96752

Ação de Inseticidas Botânicos sobre a Preferência Alimentar e sobre Posturas de Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) em Milho
Provedor de dados: 25
Autores: Mazzonetto, Fábio; Coradini, Flávia; Corbani, Renato Zapparoli; Dalri, Alexandre Barcellos.
Resumo. O presente trabalho objetivou comparar o efeito de diferentes extratos de origem vegetal na preferência alimentar e na postura da lagarta do cartucho Spodoptera frugiperda (J.E. Smith) em folhas de milho. Extratos aquosos a 10% p/v de Chenopodium ambrosioides (Linnaeus) (Erva de Santa Maria), Corymbia citriodora (Hill &amp; Johnson) (Eucalipto Cheiroso), Chrysanthemum leucanthemum (Linnaeus) (Crisântemo) e Azadirachta indica (A. Juss) (Nim) foram aplicados em discos de folhas de milho e oferecidos às lagartas em testes com e sem chance de escolha. A atratividade das lagartas pelos discos com os extratos não diferiu da testemunha no teste com chance de escolha, porém os extratos de Nim e Crisântemo apresentaram efeito fagodeterrente a S. frugiperda....
Tipo: Article
Palavras-chave: Extratos Vegetais; Lagarta do Cartucho; Fall Armyworm; Vegetal Extracts.
Ano: 2013
URL: http://hdl.handle.net/2315/265

Acceptance of hybrid seed in Thai agriculture
Provedor de dados: 106
Autores: Prasert Boonmayam.
Palavras-chave: Corn; Maize; Hybrid seed; Hybrids; Production; Thailand; ข้าวโพด; เมล็ดพันธุ์ลูกผสม; การผลิตเมล็ดพันธุ์.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4035

Accounting for Neighborhood Influence in Estimating Factors Determining the Adoption of Improved Agricultural Technologies
Provedor de dados: 31
Autores: Langyintuo,   Augustine S.; Mekuria,   Mulugetta.
Researchers have traditionally applied censored regression models to estimate factors influencing farmers'’ decisions to adopt improved technologies for the design of appropriate intervention strategies. The standard Tobit model, commonly used, assumes spatial homogeneity implicitly but the potential for the presence of spatial heterogeneity (spatial autocorrelation or dependence) is high due to neighborhood influence among farmers. Ignoring spatial autocorrelation (if it exists) would result in biased estimates and all inferences based on the model will be incorrect. On the other hand, if spatial dependence is ignored the regression estimates would be inefficient and inferences based on t and F statistics misleading. To account for neighborhood influence,...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2005
URL: http://purl.umn.edu/19521

Accuracy and simultaneous selection gains for N-stress tolerance and N-use efficiency in maize tropical lines
Provedor de dados: 63
Autores: Mendonça,Leandro de Freitas; Granato,Ítalo Stefanine Correia; Alves,Filipe Couto; Morais,Pedro Patric Pinho; Vidotti,Miriam Suzane; Fritsche-Neto,Roberto.
ABSTRACT Maize plants can be N-use efficient or N-stress tolerant. The first have high yields in favorable environments but is drastically affected under stress conditions; whereas the second show satisfactory yields in stressful environments but only moderate ones under optimal conditions. In this context, our aim was to assess the possibility of selecting tropical maize lines that are simultaneously N-stress tolerant and N-use efficient and check for differences between simultaneous selection statistical methods. Sixty-four tropical maize lines were evaluated for Nitrogen Agronomic Efficiency (NAE) and Low Nitrogen Tolerance (LNTI) response indices and two per se selection indices, Low Nitrogen Agronomic Efficiency (LNAE) and Harmonic Mean of Relative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Correlation between traits; Winter maize; Mixed models.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000600481

Activation of phenylalanine ammonia lyase as a key component of the antioxidative system of salt-challenged maize leaves
Provedor de dados: 61
Autores: Gholizadeh,Ashraf; Kohnehrouz,B. Baghban.
Differential antioxidative activities were assessed in the leaves of two maize inbreds (A-180 and A-619) under salt stress and the subsequent recovery period. Total antioxidation test revealed that in both inbreds, this ability was sharply increased during stress period, but was slowly reverted back to the normal level during recovery. The enzymatic antioxidative analysis showed differential patterns in the activities of catalase, peroxidase and polyphenol oxidase in both maize inbreeds. Comparative analysis of the activity of phenylalanine ammonia lyase (PAL), a key enzyme at the gateway of propanoid biosynthetic pathway, suggested that propanoid compounds might be antioxidants of pivotal importance to the salt-challenged maize antioxidation system. As...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidation; Maize; Salt stress; PAL; Catalase; Peroxidase; Polyphenol oxidase.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000400001

Adaptability and stability in commercial maize hybrids in the southeast of the State of Minas Gerais, Brazil
Provedor de dados: 124
Autores: Faria,Sirlene Viana; Luz,Luiz Silva; Rodrigues,Mateus Cupertino; Carneiro,José Eustáquio de Souza; Carneiro,Pedro Crescêncio Souza; DeLima,Rodrigo Oliveira.
ABSTRACT The aim of this study was to evaluate the adaptability and stability of 29 commercial maize hybrids in the southeast of the State of Minas Gerais, Brazil, employing three methods. The 29 commercial maize hybrids from the 2014/2015 crop were evaluated for grain yield in five locations in the southeast of Minas Gerais. A randomised-block design was used, with two replications. Each lot comprised two rows, five meters in length, at a spacing of 0.80 m, giving an effective area of 8.00 m2. In addition to individual and combined variance analysis, the methods of Eberhart &amp; Russell (1966), AMMI (Additive Main Effects and Multiplicative Interaction Analysis) and mixed models were used to evaluate the adaptability and stability of the 29 hybrids....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L; Genotype x environment interaction; Hybrid recommendation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000200347

Adaptability and stability of maize hybrids in unreplicated multienvironment trials
Provedor de dados: 124
Autores: Santos,Diego Coelho dos; Pereira,Carlos Henrique; Nunes,José Airton Rodrigues; Lepre,André Luiz.
ABSTRACT In maize breeding programs conducted by private companies, it is common to perform the product advanced trials (PAT) in several cultivation environments in order to better recommend the new hybrids, as well as to provide opportunities for the farmers to evaluate their products. The aim of this study was to describe the adaptability and stability of maize hybrids from unreplicated PATs using a multivariate approach combined with univariate methods. We considered the grain yield data of twelve maize hybrids evaluated in a PATs network conducted by the company DuPont Pioneer in 80 cultivation environments in the states of Minas Gerais and Goias, in second-crop of 2014. The AMMI analysis was employed and additionally we applied the methods based on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Product Advancement Trials; Genotype by Environment Interaction; AMMI; Reliability Index.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100083

Adaptação do modelo STICS ao balanço hídrico da sequência milho-milheto em sistema de plantio direto no cerrado brasileiro.
Provedor de dados: 14
Autores: SILVA, F. A. M. da; SCOPEL, E.; PINTO, H. S.; ASSAD, E. D.; CORBEELS, M.
bitstream/CPAC-2009/26890/1/p2005_66.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize; Simulation; Growth.; Balanço Hídrico; Cerrado; Crescimento; Milho; Rendimento; Simulação; Zea Mays.; Crop yield; Water balance.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569497

Adaptación a clima templado de poblaciones exóticas de maíz mediante selección masal visual.
Provedor de dados: 32
Autores: Gómez Espejo, Ana Luisa.
Independientemente de la eficiencia teórica de los métodos de mejoramiento, es la cantidad de variabilidad genética en las poblaciones la que determina el progreso genético obtenido por ciclo de selección; por ello, es de particular interés para todo programa de mejoramiento genético de maíz (Zea mays L.) incrementar la variabilidad genética de su germoplasma base, siendo para ello una vía la adaptación y uso de germoplasma exótico tropical o subtropical en las regiones de clima templado. En este trabajo se consideró la expresión del rendimiento de grano como indicador de la adaptación a clima templado, proponiéndose además que los genes de adaptación son dominantes sobre los de inadaptación. Así, durante los ciclos P-V 2011 y 2012, se evaluaron 48...
Palavras-chave: Zea mays L.; Adaptación; Selección masal; Rendimiento; Heterosis; Cruzas; Razas exóticas tropicales; Razas de clima templado; Adaptation; Crosses; Yield; Mass selection; Tropical exotic races; Temperate climate races; Genética; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2269

Additive containing homo and heterolactic bacteria on the fermentation quality of maize silage - doi: 10.4025/actascianimsci.v35i4.18833
Provedor de dados: 2
Autores: Junges, Daniel; Universidade de São Paulo; Schmidt, Patrick; Universidade de São Paulo; Novinski, Charles Ortiz; Universidade Federal do Paraná; Daniel, João Luiz Pratti; Universidade de São Paulo.
This trial evaluated the addition of Lactobacillus plantarum, L. brevis and Enterococcus faecium combo additive against a control treatment. The silages were made in laboratory silos that were stored for 30, 60, 90 or 120 days before opening. We evaluated the chemical composition of the forage before and after ensiling and the fermentative losses of silages. The additive decreased (p &amp;lt; 0.01) effluent production (11.4 kg ton-1) compared to control silage (14.0 kg ton-1), but it increased (p &amp;lt; 0.01) the Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) from 45.6% and 24.5% to 47.0 and 25.1% for control and additive silages, respectively. The storage periods affected (p &amp;lt; 0.01) effluent production, Dry Matter Losses (DML), NDF,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 4.03.05.00-7; Zootecnia; Forragicultura  silagem  alimentação animal aerobic stability; Effluent  gases; Lactobacillus brevis; Lactobacillus plantarum; Losses Aerobic stability; Effluent; Gases; Lactobacillus brevis; Lactobacillus Plantarum; Losses.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/18833

Administração de tanino condensado a cada 21 dias para o controle da verminose ovina.
Provedor de dados: 14
Autores: BENAVIDES, M. V.; GENRO, T. C. M.; SOUZA, C. J. H. de.
Dezenove ovinos jovens recém-desmamados (fêmeas com 23,7 ± 4,36 kg de média de peso vivo) foram divididos em dois grupos: um grupo com administração de extrato de tanino condensado de Acacia mearnsii a cada 21 dias em um total de 3 administrações com 21 dias de intervalo entre elas e o outro sem a administração de tanino, ambos grupos receberam 1,5% do peso vivo em milho quebrado. O período experimental foi de 9 semanas. A porcentagem de tanino na dieta foi de 4,9% na matéria seca, sendo que os dois grupos pastejaram na mesma área de campo. Coletas de amostras de fezes para a contagem do número de parasitos e de sangue para determinação de volume globular foram realizadas semanalmente e o peso corporal foi avaliado a cada 21 dias. Animais com volume...
Tipo: Folhetos
Palavras-chave: Ovino; Verminose; Tanino; Extrato Vegetal; Alimento Alternativo.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1144749

Adoption and Impacts of Improved Maize Production Technology: A Case Study of the Ghana Grains Development Project
Provedor de dados: 31
Autores: Morris,   Michael L.; Tripp,   Robert; Dankyi,   A.A.
Tipo: Journal Article
Palavras-chave: Ghana; Maize; Zea mays; Plant production; Seed production; Productivity; Production factors; High yielding varieties; Fertilizer application; Cropping systems; Farming systems; Farm income; On farm research; Extension activities; Research projects; Technology transfer; Appropriate technology; Innovation adoption; Socioeconomic environment; Economic analysis; Economic trends; Economic policies; Human nutrition; Surveys; Sampling; Case studies; Agroecological zones; Ghana Grains Development Project; Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/48767

Adoption and Impacts of Zero-Tillage in the Rice-Wheat Zone of Irrigated Haryana, India
Provedor de dados: 31
Autores: Erenstein,   Olaf; Malik,   R.K.; Singh,   Sher.
This study documents the adoption and impacts of zero-tillage (ZT) wheat in the rice-wheat systems of India’s Haryana State primarily drawing on a detailed empirical survey of 400 rice-wheat farmers. Our random stratified sample revealed 34.5% to be ZT wheat adopters and a quarter of the wheat area in the surveyed communities to be under ZT. The study suggests the potential for further diffusion but also flags the issue of disadoption (10%). ZT adopters, non-adopters, and disadopters differ significantly in terms of their resource bases, with adopters typically showing the most favorable values. ZT drastically reduces tractor operations in farmers’ ZT wheat fields from an average of 8 passes to a single pass, implying a saving of 6 tractor hours and 36...
Tipo: Report
Palavras-chave: Wheat; Rice; Agricultural development; Innovation adoption; Drilling equipment; Farming systems; Zero tillage; Production costs; Credit; Income; India; Crop Production/Industries; E16; F08.
Ano: 2007
URL: http://purl.umn.edu/56092

Adoption and Impacts of Zero-Tillage in the Rice-Wheat Zone of Irrigated Punjab, Pakistan
Provedor de dados: 31
Autores: Farooq,   Umar; Sharif,   Muhammad; Erenstein,   Olaf.
This study documents the adoption and impacts of zero-tillage (ZT) wheat in the ricewheat systems of Pakistan’s Punjab province primarily drawing on a detailed empirical survey of 458 rice-wheat farmers. Our random stratified sample revealed 19% to be ZT wheat adopters and a similar share of the wheat area in the surveyed communities to be under ZT. The study suggests that diffusion has stagnated and also flags the issue of disadoption (14%). ZT adopters, non-adopters, and disadopters differ significantly in terms of their resource bases, with adopters typically showing the most favorable values. ZT drastically reduces tractor operations in farmers’ ZT wheat fields from an average of 8 passes to a single pass, implying a saving of 7 tractor hours and 35...
Tipo: Report
Palavras-chave: Wheat; Rice; Agricultural development; Drilling equipment; Economic analysis; Innovation adoption; Farming systems; Cropping patterns; Production costs; Zero tillage; Pakistan; Crop Production/Industries; E16; F08.
Ano: 2007
URL: http://purl.umn.edu/56095

Adoption and Use of Improved Maize by Small-Scale Farmers in Southeast Guatemala
Provedor de dados: 31
Autores: Sain,   Gustavo; Martinez,   Julio.
This report is based on a study of the adoption and use of improved open-pollinated varieties and hybrids by small-scale farmers in the Department of Jutiapa, Guatemala. The majority of maize producers in Guatemala are small-scale subsistence farmers. Approximately 60% of the basic grains produced in the country are grown on farms that are too small to satisfy the basic nutritional needs of a typical family (5-6 persons). Increasing yields through the use of new technologies is seen as a critical step to ensuring adequate nutrition and increasing farmer income in the area. The study, conducted in June and July 1991, randomly surveyed 208 farmers in 18 municipalities of Jutiapa, apportioned according to the number of farms in each municipality. There was...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/7687

Adoption, Management, and Impact of Hybrid Maize Seed in India
Provedor de dados: 31
Autores: Singh,   R.P.; Morris,   Michael L.
This paper presents results of a 1995 survey of 864 maize-growing households in six states that account for more than 70% of India's maize area: Andhra Pradesh, Bihar, Karnataka, Madhya Pradesh, Rajasthan, and Uttar Pradesh. The current adoption of improved open-pollinated maize varieties (OPVs) and hybrids is quantified, the relationship between adoption of improved germplasm and use of improved crop management practices is examined, the economic impacts of adoption are estimated, farmers' seed procurement and management practices are described, and implications for maize research and development policy are discussed. On the whole, the survey results confirm that India's national maize seed industry is expanding rapidly. Since seed policy reforms were...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/7691

Adoption of a New Maize and Production Efficiency in Western Kenya
Provedor de dados: 31
Autores: Mignouna,   D.B.; Mutabazi,   K.D.S.; Senkondo,   E.M.; Manyong,   Victor M.
Declining yields of maize as a result of Striga infestation has necessitated a new technology known as Imazapyr-resistant maize (IRM) to contain the problem. As a result, research and development initiatives with substantial participation of the private sector to transfer this new technology to farmers have been made in western Kenya. This study therefore assesses the adoption of IRM variety and efficiency levels of farmers in western Kenya. A multi-stage sampling technique was used to select a total of 600 households from Nyanza and Western provinces for this study. Tobit model and stochastic production frontier analysis were the analytical methods. Results show that age, education, maize production gap, risk, contact with extension agents, lack of seeds,...
Tipo: Journal Article
Palavras-chave: IRM technology; Efficiency; Stochastic production frontier; Tobit model; Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/96160

Adoption of Hybrid maize in Zambia: effects on gender roles, food consumption, and nutrition
Provedor de dados: 31
Autores: Kumar,   Shubh K.
Enhanced agriculture productivity in sub-Saharan Africa is critical to promote economic growth and poverty alleviation and to avoid increasing food scarcities in the region. The impact of commercialization and intensification of agriculture on the well- being of the rural poor depends on how they are carried out. Past research by IFPRI and collaborating institutions on commercialization of small- scale farming in about a dozen countries provided new knowledge about the relationships between commercialization and rural well- being as measured by incomes, consumption, and nutrition. These links were shown to depend greatly on household behavior, which in turn is influenced by intrahousehold processes. A better understanding of these processes is likely to...
Tipo: Report
Palavras-chave: Corn industry; Zambia; Eastern Province; Hybrid corn; Economic aspects; Food consumption; Nutrition; Agricultural laborers; Sex role in work environment; Crop Production/Industries; Food Consumption/Nutrition/Food Safety.
Ano: 1994
URL: http://purl.umn.edu/37917

Adoption of Improved Maize and Common Bean Varieties in Mozambique
Provedor de dados: 31
Autores: Lopes,   Helder.
Household adoption of new agricultural technologies, including improved maize and bean varieties in Mozambique, is still relatively low. As a result, the average maize and common bean production remains low. This study identifies factors that are associated with households’ adoption of improved maize and bean varieties, using Trabalho de Inquérito Agrícola (TIA) 2007 data and the probit model to estimate the likelihood of household adoption of improved varieties of maize and common beans at both the national and regional levels. At the national level, the results indicate that household head’s education, access to extension services and credit are associated with the household’s adoption decision. However, association membership is negatively associated...
Tipo: Thesis or Dissertation
Palavras-chave: Agricultural and Food Policy; Food Security and Poverty; International Development; Production Economics; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2010
URL: http://purl.umn.edu/97838

Adoption of Improved Maize Seed by Smallholder Farmers in Mozambique
Provedor de dados: 31
Autores: Zavale,   Helder; Mabaya,   Edward T.; Christy,   Ralph D.
The objective of this paper is to investigate factors influencing the adoption of improved maize seed by smallholder farmers in Mozambique. The data used in this study were obtained from a national random sample of 4,908 smallholder farmers conducted by the Ministry of Agriculture and Rural Development in 2002. Using Probit and Logit models, the main factors influencing adoption of improved maize seed were identified. The results of this analysis indicate that fifteen out of twenty five factors are significantly found to be the determining factors influencing the probability of adopting improved maize seed. To increase the likelihood of adopting improved maize seed, policy makers should put more emphasis on improving rural infrastructures and providing...
Tipo: Working Paper
Palavras-chave: Crop Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/121065

Adoption of Improved Wheat Technologies by Small-Scale Farmers in Mbeya District, Southern Highlands, Tanzania
Provedor de dados: 31
Autores: Mussei,   Ahaz; Mwanga,   Judicate; Mwangi,   Wilfred; Verkuijl,   Hugo; Mongi,   Rose; Elanga,   Anthony.
This study was conducted to gain an understanding of how small-scale farmers in Mbeya District have adopted improved wheat technologies promoted by the wheat research program at MARTI-Uyole. The specific objectives were to assess farmers’ wheat management practices, determine the technical and socioeconomic factors affecting the adoption of improved wheat technologies, and draw implications for research, extension, and policy. A purposive multistage sampling procedure was used to select 202 farmers, 160 from Tembela Division and 42 from Isangati Division, which are two important wheat-growing areas in Mbeya District. Primary data were collected using structured questionnaires and supplemented by secondary information obtained from MARTI-Uyole. Juhudi was...
Tipo: Report
Palavras-chave: Tanzania; Wheats; Varieties; Innovation adoption; Technology transfer; Economic indicators; Socioeconomic environment; Plant breeding methods; Research programs; Crop management; Fertilizer application; Food production; Small farms; Highlands; Crop Production/Industries; E14; E30.
Ano: 2001
URL: http://purl.umn.edu/56190

ADOPTION OF MAIZE AND WHEAT TECHNOLOGIES IN EASTERN AFRICA: A SYNTHESIS OF THE FINDINGS OF 22 CASE STUDIES
Provedor de dados: 31
Autores: Doss,   Cheryl R.; Mwangi,   Wilfred; Verkuijl,   Hugo; De Groote,   Hugo.
This paper synthesizes the findings of 22 micro-level studies on technology adoption carried out by the International Maize and Wheat Improvement Center (CIMMYT) with national agricultural research systems in Ethiopia, Kenya, Tanzania, and Uganda from 1996-1999. The authors found that technology adoption is taking place across Eastern Africa but considerable scope remains to improve the productivity of smallholder agriculture in higher potential regions with high levels of adoption. Extension was the variable most highly correlated with technology adoption, and extension services continue to play an important role in disseminating information on new varieties and how to manage them. Despite the usefulness of the micro-study results, especially for priority...
Tipo: Working or Discussion Paper
Palavras-chave: Maize; Wheat; Innovation adoption; Technology transfer; Plant Breeding; Small farms; Case studies; Fertilizers; Private sector; Nongovernmental organizations; Research institutions; International organizations; Kenya; Tanzania; Uganda; Farm Management.
Ano: 2003
URL: http://purl.umn.edu/46522

Adoption of Maize Conservation Tillage in Azuero, Panama
Provedor de dados: 31
Autores: de Herrera,   Adys Pereira; Sain,   Gustavo.
An aggressive research and validation program launched in 1984 in Azuero, Panama, yielded a recommendation advocating zero tillage for maize production. Ten years later, maize farmers in Azuero used three land preparation methods: conventional tillage, zero tillage, and minimum tillage (an adaptation of the zero tillage technology). This study aimed to quantify the adoption of zero and minimum tillage for maize in Azuero; identify factors influencing adoption of the different land preparation practices; and analyze the implications of the findings for future maize research and extension. Between 1985 and 1994, farmers in Region I of Azuero changed from conventional tillage to zero (33%) and minimum tillage (43%). In Regions II and III, most farmers still...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/7696

Adoption of Maize Production Technologies in the Coastal Lowlands of Kenya
Provedor de dados: 31
Autores: Wekesa,   E.; Mwangi,   Wilfred; Verkuijl,   Hugo; Danda,   Milton Kengo; De Groote,   Hugo.
Maize is the major food crop grown in the coastal region of Kenya and constitutes a major component of the diet of the population in the region. However, average yields are far below the potential for the region and low production levels create serious food deficits. Over the years, new technologies have been introduced but adoption has remained low, especially for fertilizer. This paper examined current maize-farming practices and technological and socioeconomic factors that influenced adoption in the Kilifi and Kwale Districts of the Coast Province, that together account for half of maize production in the region. The study found low adoption levels for improved maize varieties and technology, especially fertilizer, among farmers in the area. Farmers...
Tipo: Report
Palavras-chave: Maize; Crops; Innovation adoption; Technology transfer; Food production; Production economics; Production factors; Plant breeding; Fertilizers; Yields; Kenya; Crop Production/Industries; E14; E16.
Ano: 2003
URL: http://purl.umn.edu/56109

Adoption of Veterinary Technologies Amongst Sheep and Goat Farmers in Qwawqa, South Africa
Provedor de dados: 31
Autores: Nell,   Wilhelm T.; Schwalbach,   L.
Technological breakthroughs in agriculture after the Second World War mainly concentrated on crop production (wheat, rice, and later maize). In the livestock production sector, besides the substantial improvements in the poultry and dairy production systems, the development of the other livestock technologies was neglected, due to lower returns when compared to those on crop technology. Nevertheless, the usage of livestock veterinary technologies such as veterinary services and medicines remains important for livestock production as animal diseases are a major cause of poor productivity and high mortality rates, which are major constraints to improve food security. The reasons for poor adoption of livestock veterinary technologies amongst livestock farmers...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management; Livestock Production/Industries.
Ano: 2002
URL: http://purl.umn.edu/6974

Adsorption, immobilization and activity of cellulase in soil: the impacts of maize straw and its humification
Provedor de dados: 52
Autores: Sinegani,Ali Akbar Safari; Sinegani,Mahboobe Safari.
The present work aimed to study some aspects of sorption and immobilization of cellulase molecules on soil components by the analysis of the reactions of cellulase in a soil treated with different levels of maize residue and incubated for 90 days. The analysis of variance showed that the effects of the treatments of maize straw, incubation time and their interaction on cellulase adsorption, desorption and immobilization were statistically significant. The adsorption and immobilization capacities of soil by application of maize straw increased significantly. However they decreased with decreasing the soil organic matter (SOM) after 45 days of incubation. The desorption of adsorbed cellulase molecules from the soil by washing with distilled water depended on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize straw; Humification; Cellulase; Sorption; Immobilization; Activity.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000600001

ADUBAÇÃO NPK na cultura do milho.
Provedor de dados: 14
bitstream/item/91252/1/Fd124.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cultivo; Pará; Brasil; Maize; Cultivation.; Adubação; Milho; Npk.; Amazonia; NPK fertilizers.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/373895

Adubacao verde no periodo da seca nos cerrados: efeito na cultura do milho.
Provedor de dados: 14
Autores: BURLE, M. L.; RESCK, D. V. S.; SUHET, A. R.; PERES, J. R. R.; BOWEN, W. T.; PEREIRA, J.
bitstream/item/102179/1/pesq-45.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Epoca seca; Cultivo; Cultivation; Maize.; Adubação Verde; Cerrado; Milho; Zea Mays.; Dry season; Green manures.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549384

Adubos verdes: efeitos no rendimento e no nitrogenio do milho em plantio direto e convencional.
Provedor de dados: 14
Autores: CARVALHO, A. M. de; CARNEIRO, R. G.; AMABILE, R. F.; SPERA, S. T.; DAMASO, F. H. M.
bitstream/item/75916/1/bolpd-07.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Maize; Zero tillage; Crop sucession; Direct sowing; Dry watter; Espécies de cobertura; Green manure; No tillage; Production; Sucessão de cultivos; Sucessão de cultura.; Adubo Verde; Cerrado; Matéria Seca; Milho; Nitrogênio; Produção; Plantio Direto; Rendimento; Zea Mays.; Cover crops; Green manures; Crop yield; Nitrogen; Sequential cropping.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/555406

Aerobic deterioration influences the fermentative, microbiological and nutritional quality of maize and sorghum silages on farm in high quality milk and cheese production chains
Provedor de dados: 96
Autores: Borreani,Giorgio; Bernardes,Thiago Fernandes; Tabacco,Ernesto.
Maize and sorghum silages are good sources of energy for lactating dairy cows that produce milk destined for fresh and matured cheeses. Silages are usually stored in horizontal silos with or without side walls on commercial farms throughout the world. The main microbiological and nutritional quality problems are related to harvesting time, ensiling technology, and management practices during filling and feed-out. Aerobic deterioration is a key point that must avoided on farms in order to improve the hygienic, chemical and sensorial quality of milk and cheeses. Aerobic deterioration causes large losses of dry matter (DM) and quality, and it can cause health problems for animals and humans through the transfer of pathogens and mycotoxins from feed and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aerobic deterioration; Management practices; Silostop; Plastic film; Spoilage microorganisms; Maize silage.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982008001300009

Aerobic Rice: Benefits without going to the Gym?
Provedor de dados: 31
Autores: Bayot,   Ruvicyn; Templeton,   Deborah J.
Rice, a staple food for over 70% of Asians, is also the single biggest user of water, requiring 2‐3 times more water per unit of grain produced than crops such as wheat and maize. With growing populations, increased urbanisation and environmental degradation, the supply of fresh water is depleting. Recognising the water constraints to rice yield, the aim of the project entitled ‘Developing a System of Temperate and Tropical Aerobic Rice (STAR) in Asia’ was to develop water‐efficient aerobic rice technologies. This paper highlights the success of that project.
Tipo: Conference Paper or Presentation
Palavras-chave: Aerobic rice; Economic impact; Crop Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/47635

Aflatoxin Contamination and Consumer Valuation of Maize in Western Kenya
Provedor de dados: 31
Autores: Hoffmann,   Vivian; Mutiga,   Samuel; Nelson,   Rebecca; Gatobu,   Ken; Milgroom,   Michael; Harvey,   Jagger.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/61903

Aflatoxins, ochratoxin A and zearalenone in maize-based food products
Provedor de dados: 58
Autores: Sekiyama,Beatriz Leiko; Ribeiro,Alessandra Braga; Machinski,Paulo André; Machinski Junior,Miguel.
The occurrence of aflatoxins B1 (AFB1), B2 (AFB2 ), G1 (AFG1 ) and G2 (AFG2 ), ochratoxin A (OA) and zearalenone (ZEA) was evaluated in 121 maize-based food samples collected in the commerce of Maringá City, Paraná State, Brazil. The study was carried out between January 2002 and February 2003. Thin-layer chromatographic method was used to determine the mycotoxins. The recovery averages were 106.6%, 109.4%, 106.6%, 109.4%, 101.8% and 101.7% to AFB1, AFB2, AFG1, AFG2, OA and ZEA, respectively. Three samples (2.5%) were positive to AFB1 (8 to 59 µg/kg), two (1.7%) to AFB2 (2.4 µg/kg), one (0.8%) to OA (64 µg/kg) and one (0.8%) to ZEA (448 µg/kg). The greater frequency of positive samples and also the highest concentration of AFB1 were found in popcorn...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycotoxins; Risk; Brazilian products derived from maize.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000300016

Agentes gelificantes alternativos na micropropagação de bananeira cv. Prata Catarina.
Provedor de dados: 14
Autores: SANTOS, H. M. G. dos; CARVALHO, A. C. P. P. de; SCHNEIDER, F.; ROSSETTI, A. G.; CAMPOS, A. S.
O ágar é o gelificante mais utilizado no preparo de meios de cultivo semissólidos na micropropagação vegetal. Porém, por ser um dos componentes de maior custo, agentes gelificantes alternativos vêm sendo prospectados, razão do objetivo deste trabalho ter sido avaliar o desempenho de mudas micropropagadas de ananeira, cv. Prata Cataria, na fase de alongamento e enraizamento, em meio de cultivo MS contendo diferentes gelificantes alternativos, tais como sagu, fécula de mandioca e amido de milho, produtos encontrados em supermercados. Agar is the most widely used gelling agent in the preparation of semi-solid culture media in plant micropropagation. However, because it is one of the most costly components, alternative gelling agents have been prospecting. The...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Agentes gelificantes; Meio de cultivo; Bananeira; Fécula de mandioca; Amido de milho; Maize starch; Culture medium; Musa sp; Micropropagação; Cassava starch; Gelling agents.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125505

Aggressiveness between genetic groups I and II of isolates of Cercospora zeae-maydis
Provedor de dados: 63
Autores: Mathioni,Sandra Marisa; Carvalho,; Brunelli,Kátia Regiane; Beló,André; Camargo,Luis Eduardo Aranha.
For many years, the gray leaf spot disease (GLS) caused by the fungus Cercospora zeae-maydis Tehon &amp;amp; Daniels, was not considered an important pathogen of maize (Zea mays, L.) in Brazil. However, the recent adoption of agronomical practices such as no-tillage and cultivation under central pivot irrigation systems increased the incidence and severity to the extent that GLS is now one of the most important diseases of maize. Isolates of C. zeae-maydis can be distinguished by two genetic groups (I and II) based on AFLP markers and on polymorphisms of the ITS and 5.8S rDNA regions. Until now, however, the biological implications of this distinction remain unclear. This study investigated whether isolates from the two genetic groups differ in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Disease resistance; Gray leaf spot; Genetic variability; Pathogenicity.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000600006

Agricultura de precisão: possibilidades de manejo da adubação nitrogenada para o milho no Cerrado.
Provedor de dados: 14
Autores: HURTADO, S. M. C.; RESENDE, A. V. de; SILVA, C. A.; CORAZZA, E. J.; SHIRATSUCHI, L. S.
Altas produtividades de milho são dependentes da interação de fatores como clima, solo e manejo. O manejo da adubação nitrogenada é um dos principais condicionantes da produtividade, pela complexa dinâmica do nitrogênio (N) nos sistemas agrícolas. É com base nessa dinâmica que se busca estimar o potencial de suprimento de N pelo solo e o seu aproveitamento pela cultura, o que possibilita definir as recomendações de adubação. Contudo, a maioria das variáveis que influencia a necessidade de N na adubação pode mudar no espaço e no tempo, como é o caso das características edafoclimáticas que interferem no potencial de suprimento do nutriente pelo solo. Assim, para se refinar o manejo da adubação nitrogenada, é preciso considerar a sua variabilidade espacial e...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fertillidade do solo; Adubação nitrogenada; Precision farming; Maize; Zero tillage.; Agricultura de Precisão; Cerrado; Milho; Plantio Direto; Zea Mays.; Nitrogen fertilizers; Soil fertility.
Ano: 2008
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/556775

Agricultural Commercialization in the Uplands of Northern Vietnam: How to Achieve Both Poverty Reduction and Environmental Sustainability Goals?
Provedor de dados: 31
Autores: Keil,   Alwin; Saint-Macary,   Camille; Zeller,   Manfred.
Income growth and urbanization in developing countries have enlarged markets for highvalue agricultural commodities. However, there are concerns that lacking access to physical, financial, and human capital, as well as infrastructure and institutions limit the ability of the poor to participate in and benefit from such commercial agricultural activities. There may further be a trade-off between wealth enhancing effects of intensive commercial agriculture and adverse long-term effects on farmers’ livelihoods due to natural resource degradation. This study provides empirical evidence on these crucial issues and derives related policy recommendations using the example of Vietnam. Here, economic growth has boosted the demand for animal products and,...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural commercialization; Maize cultivation; Sustainability; Tobit regression; Vietnam; Landwirtschaftliche Kommerzialisierung; Maisanbau; Nachhaltigkeit; Tobit-Regression; Vietnam; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/114487

Agricultural crops in the diet of bearded capuchin monkeys, Cebus libidinosus Spix (Primates: Cebidae), in forest fragments in southeast Brazil
Provedor de dados: 104
Autores: Freitas,Carlos Henrique de; Setz,Eleonore Z. F.; Araújo,Alba R. B.; Gobbi,Nivar.
Capuchin monkeys occupy a wide range of habitats where they feed on fruits, arthropods, and vertebrates. Their large home ranges (80-900 ha) suggest that living in forest fragments may challenge their adaptability. We identified and quantified the main food items of Cebus libidinosus Spix, 1823 in forests fragments (100 ha) in southeastern Brazil. We recorded the feeding activities of two groups using scan sampling over a 13-month period. The diet was composed of fruits, crops, animal prey, seeds, plant matter and undetermined. Fruit was eaten more in the wet season than in the dry season, and maize and sugar cane consumption peaked in the early dry season. The proportion of fruit in the diet was positively correlated with fruiting intensity of zoochorous...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Franca; Gallery forest fragments; Maize; Sugar cane.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000100006

Agricultural Extension in Kenya: Practice and Policy Lessons
Provedor de dados: 31
Autores: Muyanga,   Milu; Jayne,   Thomas S.
A consensus exists that extension services, if functioning effectively, improve agricultural productivity through providing farmers with information that helps them to optimize their use of limited resources. Variations in management practices and husbandry skills among small farmers in Kenya are very great. Tremendous poverty-reducing benefits could be reaped by bringing the production costs of the most inefficient farmers to mean productivity levels. Achieving these gains in maize production efficiency will depend on many factors, but extension is likely to be among the most important. Therefore, the costs to the nation of having an underperforming extension service – in terms of smallholder productivity, incomes, and poverty reduction, and the ability...
Tipo: Working or Discussion Paper
Palavras-chave: Extension services; Kenya; Policy reforms; Privatization; Teaching/Communication/Extension/Profession; Q18.
Ano: 2006
URL: http://purl.umn.edu/55168

Agricultural Growth, Poverty, and Nutrition in Tanzania
Provedor de dados: 31
Autores: Pauw,   Kalie; Thurlow,   James.
Rapid economic growth has failed to significantly improve poverty and nutrition outcomes in Tanzania. This raises concerns over a decoupling of growth, poverty, and nutrition. We link recent production trends to household incomes and caloric availability using a dynamic computable general equilibrium and micro-level poverty and nutrition modules. Results indicate that the structure of economic growth—not the level—is currently constraining the rate of poverty reduction in Tanzania. Agricultural growth has been driven by larger-scale farmers that are less likely to be poor. Growth has further been concentrated in crops grown in only a few regions of the country. Slow expansion of food crops and livestock also explains the weak relationship between...
Tipo: Journal Article
Palavras-chave: Economic growth; Poverty; Nutrition; Computable general equilibrium modeling; Tanzania; Food Security and Poverty.
Ano: 2010
URL: http://purl.umn.edu/95974

AGRICULTURAL MECHANIZATION AND ECONOMIC EFFICIENCY OF AGRICULTURAL PRODUCTION IN EGYPT
Provedor de dados: 31
Autores: Soliman,   Ibrahim.
BEIJING UNIVERSITY OF AGRICULTURAL ENGINIREEING,BEIJING CHINA
Tipo: Conference Paper or Presentation
Palavras-chave: Crop response functions; Human-Machinery Labor Isoquants Map; Least cost combination of labor inputs; Community/Rural/Urban Development; Crop Production/Industries; Farm Management.
Ano: 1992
URL: http://purl.umn.edu/112669

AGRICULTURAL POLICIES IN INDONESIA: PRODUCER SUPPORT ESTIMATES 1985-2003
Provedor de dados: 31
Autores: Thomas,   Marcelle; Orden,   David.
As in many other developing countries, the concerns about food security in Indonesia during the 1980s and early 1990s resulted in policies aimed at achieving self-sufficiency in food crops. The Government of Indonesia (GOI) combined price interventions and economic incentives to encourage agricultural production, especially of the staple crops. From 1985 to 1998, Indonesia started a series of domestic and trade reforms emanating from a combination of unilateral undertakings, the country’s commitments to the WTO, and the government’s agreement with the IMF following the 1997/98 financial crisis. This study computes nominal protection rates and producer support estimates (NPR and PSE) for Indonesia for the period 1985-2003 for six agricultural commodities,...
Tipo: Report
Palavras-chave: Agricultural and Food Policy; International Relations/Trade.
Ano: 2004
URL: http://purl.umn.edu/60455

Agricultural Production Incentives: Fertilizer Markets and Insights from Kenya
Provedor de dados: 31
Autores: Wanzala,   Maria N.; Jayne,   Thomas S.; Staatz,   John M.; Mugera,   Amin W.; Kirimi,   Justus; Owuor,   Joseph.
The paper has several specific objectives. First, it identifies how fertilizer marketing costs and the types of fertilizers used have changed over the course of the liberalization process in Kenya. A second objective is to examine the fertilizer subsector in Kenya with a view to identifying organizational and institutional changes that could improve its performance. Various types of fertilizer supply chains serving farmers in western Kenya are identified, examine the cost structure of these supply chains, identify potential sources of cost reduction in these supply chains, and last, estimate the impact of illustrative scenarios for reducing fertilizer marketing costs on the profitability of maize production in western Kenya.
Tipo: Working or Discussion Paper
Palavras-chave: Food Security; Food Policy; Kenya; Fertilizer; Crop Production/Industries; Q18.
Ano: 2001
URL: http://purl.umn.edu/55150

Agricultural Research Impact Assessment: The Case of Maize Technology Adoption in Southern Mali
Provedor de dados: 31
Autores: Boughton,   Duncan; Frahan,   Bruno Henry de.
Adoption of the improved maize package was particularly rapid during the period 1980-86 when an attractive guaranteed price was offered and extension activities were reinforced by a maize project that included the establishment of a seed multiplication program. Following cereal market price liberalization in 1986, maize prices fell and have been subject to considerable variability. Area has continued to expand, but farmers have greatly reduced fertilizer use, switched back to maize-late millet intercropping, and substituted early maturing varieties better suited to their own food security needs. The estimated internal rate of return (IRR) to investment in maize research and extension in southern Mali over the period 1969-90 is 135%. This high rate can be...
Tipo: Report
Palavras-chave: Food security; Food policy; Maize; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; Downloads June 2008 - June 2009: 26; R11.
Ano: 1994
URL: http://purl.umn.edu/54729

Agricultural Subsidies and Forest Pressure in Malawi's Miombo Woodlands
Provedor de dados: 31
Autores: Fisher,   Monica G.; Shively,   Gerald E.
This paper examines impacts of an agricultural subsidy program on forest pressure in Malawi. Using household survey data, we measure the effect on forest product marketing and on forest clearing of Malawi's Starter Pack Scheme (SPS). Regression results show households receiving a free packet of hybrid maize seed and chemical fertilizer (a "starter pack") had lower levels of commercial forest extraction than nonrecipient households. In addition, no measurable effect of starter pack receipt is found on forest clearing decisions, suggesting the program raised agricultural output without encouraging agricultural expansion. Findings thus indicate potential modest improvement in forest condition due to the SPS.
Tipo: Journal Article
Palavras-chave: Africa; Agricultural intensification; Conservation and development; Malawi; Tropical deforestation; Agricultural and Food Policy; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/8646

Agricultural technology, productivity and employment: Policies for poverty reduction
Provedor de dados: 31
Autores: Thirtle,   Colin G.; Piesse,   Jenifer; Gouse,   Marnus.
This paper begins by arguing that agricultural economics has an important contribution to make to the economic transition of the new democratic South Africa. Policies are required to reduce unemployment, poverty and inequality, but does the work of agricultural economists provide the policy makers with the information necessary to make the correct choices?  In this context, we update our recent work on technology, efficiency and productivity in South African agriculture, for both the commercial and smallholder sub-sectors. For the commercial sector, this means extending the total factor productivity index and estimates of the demand for labour. For the smallholder sector, there are new results on the impacts of GM cotton and white maize on output and...
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy; Food Security and Poverty.
Ano: 2005
URL: http://purl.umn.edu/31719

Agrobacterium-mediated transformation of sorghum: factors that affect transformation efficiency
Provedor de dados: 74
Autores: Carvalho,Carlos Henrique S.; Zehr,Usha B.; Gunaratna,Nilupa; Anderson,Joseph; Kononowicz,Halina H.; Hodges,Thomas K.; Axtell,John D.
The results presented in this work support the hypothesis that Agrobacterium-mediated transformation of sorghum is feasible, analogous to what has been demonstrated for other cereals such as rice, maize, barley and wheat. The four factors that we found most influenced transformation were: the sensitivity of immature sorghum embryos to Agrobacterium infection, the growth conditions of the donor plant, type of explant and co-cultivation medium. A major problem during the development of our protocol was a necrotic response which developed in explants after co-cultivation. Immature sorghum embryos proved to be very sensitive to Agrobacterium infection and we found that the level of embryo death after co-cultivation was the limiting step in improving...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agrobacterium tumefaciens; GUS; Transformation; Sorghum.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200022

Agroclimatic characterization of APRLP-ICRISAT nucleus watersheds in Nalgonda, Mahabubnagar and Kurnool Districts
Provedor de dados: 30
Autores: A.V.R.K. ( A.V.R. Kesava Rao ).
Palavras-chave: Economic indicators; Soybeans; Groundnuts; Yields; Runoff; Summer; Maize; Agroecosystems; Watersheds; Soil management.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3326

Agronomic performance and genetic dissimilarity of second-harvest soybean cultivars using REML/BLUP and Gower’s algorithm
Provedor de dados: 53
Autores: Follmann,Diego Nicolau; Souza,Velci Queiróz de; Cargnelutti Filho,Alberto; Demari,Gustavo Henrique; Nardino,Maicon; Olivoto,Tiago; Carvalho,Ivan Ricardo; Silva,Antonio David Bortoluzzi; Meira,Daniela; Meier,Carine.
ABSTRACT The cultivation of second-harvest with soybean crop after first-harvest with maize crop has become an alternative to aggregate income to farmers in the South region of Brazil. However, there is little information about this cropping system in this region. The aims of this study were to: (i) evaluate the agronomic performance of soybean (Glycine max L.) cultivars growing in second-harvest during the summer; and (ii) evaluate the genetic divergence of the cultivars based on qualitative and quantitative traits. To do this, 18 soybean cultivars were evaluated in three field trials, sown during January in the northwestern region of Rio Grande do Sul state, Brazil. In each experiment, a randomized block design with four replicates was used. Five...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max L.; Mixed models; Quantitative and qualitative traits; UPGMA.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200197

AGRONOMIC PERFORMANCE AND PHOTOSYNTHETICALLY ACTIVE RADIATION INTERCEPTED BY MAIZE INTERCROPPED WITH BRACHIARIA
Provedor de dados: 196
Autores: Makino, Priscila Akemi; Ceccon, Gessi; Ribeiro, Luan Marlon; Ceccon, Felipe.
Maize and soybean are the main crops used for crop yield on Brazilian Cerrado biome. The off-season maize intercropped with ruzigrass [Urochloa ruziziensis (R. Germ. &amp;amp; C.M. Evrard) Crins (Syn. Brachiaria ruziziensis Germ. &amp;amp; Evrard)] increases soil cover and yield for crops in succession. However, the benefits on maize yield depend on the distribution and radiation-use efficiency (RUE) and its conversion to biomass. This study aimed to evaluate maize and ruzigrass yield in different cultivation systems. The experiment was carried out at Embrapa Agropecuária Oeste, in Dourados, MS, Brazil. The experiment design was randomized blocks, with seven treatments constituted by the combination of spacing between maize rows, single and intercropped,...
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/3624

AGRONOMIC PERFORMANCE OF CORN FOR SILAGE GROWN AFTER COVER CROPS
Provedor de dados: 22
Autores: Silva, Keoma de Freitas da; Costa, Antonio Carlos Torres da; Lázaro, Rafael de Lima; Domukoski, João Fernando; Duarte Júnior, José Barbosa; Oliveira, Paulo Sérgio Rabello de.
This study aimed to evaluate the agronomic performance of corn for silage corn grown after cover crops. The experimental design was a randomized block design with four replications and seven treatments. The treatments were corn grown in the straw 1) oat; 2) oat + oilseed radish; 3) oat + white lupine; 4) white lupine; 5) crambe; 6) spontaneus vegetation (fallow ground) and 7) spontaneus vegetation (fallow ground) + nitrogen fertilizer in the V6 phase in the amount of 100 kg ha-1 N. Were evaluated: plant height, height of ear placement, stem diameter below the ear placement, stem diameter, above the ear insertion, number of leaves below the ear placement, number of leaves above ear placement, diameter and spike length, ear number and yield of green mass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Nitrogênio; Reciclagem de nutrientes.
Ano: 2014
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/7331

Agronomic performance of late season maize, intercropped with forage crops in the northwestern Mato Grosso State, Brazil
Provedor de dados: 22
Autores: Coletti, Admar Junior; Stasiak, Diego; Martinez, Junio Cesar; Coletti, Fabricio; Dal'Maso, Diego José.
The late season maize, intercropped with forage crops in tropical areas, is an alternative to grain production and straw maintenance in the no-tillage system. The objective of this study was to evaluate the agronomic performance of late season maize, intercropped with forage crops that were sown during the topdressing in phenological stage V5. The experiment was conducted in Sapezal, MT, (13º35'13'' S, 58º47'56'' W and altitude of 570 m). It was used a random block experimental design, with five treatments (monocropping of maize, maize + Urochloa brizantha Marandu, maize + Urochloa brizantha Piata, maize + Urochloa brizantha Xaraés and maize + Panicum maximum cv. Massai), with five repetitions. Plant height, height of insertion of the first spike, plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Consórcio; Panicum maximum; Safrinha; Urochloa brizantha; Zea mays.
Ano: 2015
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/8480

Agronomic performance of maize genotypes of second crop in the North of Paraná
Provedor de dados: 22
Autores: Zucareli, Claudemir; Oliveira, Mariana Alves de; Spolaor, Leandro Teodoski; Ferreira, André Sampaio.
The study aimed to evaluate the agronomic performance of maize genotypes sown in the second crop for the region of Londrina - PR. The experiment was conducted in the field at the Farm School, Universidade Estadual de Londrina-PR. We evaluated 13 genotypes of maize (2B710, 2B587, 2B688, 2C520, DAS8089, DAS9375, DAS8010, DAS8055, DAS9379, DAS9380, DAS9384, DKB390 and AG9010), seeded 09th of March 2007. The experimental design was a randomized complete block with four replications. We evaluated cycle, degree days, features fitometrics, broken and lodged plants, yield components and productivity. Data were subjected to analysis of variance and means were compared by Scott-Knott 5%. The genotypes showed higher than average productivity in the region. Therefore,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Componentes de produção; Características fitométricas; Cultivares.
Ano: 2013
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/5593

Agronomic performance of maize hybrids under supplemental irrigation depths
Provedor de dados: 91
Autores: Ben,Luis H. B.; Peiter,Marcia X.; Robaina,Adroaldo D.; Kirchner,Jardel H.; Mezzomo,Wellington; Pimenta,Bruna D.
ABSTRACT The choice of a maize hybrid, considering the technology level and irrigation management, contributes to the improvement of the plant productivity and water use efficiency (WUE). Thus, the objective of this study was to evaluate the effects of irrigation depths on production components, grain yield, technical efficiency, and WUE in maize hybrids. The experiment was conducted in Santiago, RS state, Brazil, in the 2015/2016 and 2016/2017 crop seasons, using a randomized block design in factorial scheme, consisting of five irrigation depths (0, 50, 75, 100 and 125% of crop evapotranspiration - ETc) and four maize hybrids in crop season I (2015/2016), and six maize hybrids in crop season II (2016/2017). The number of ears per plant, number of grains...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water deficit; Zea mays L.; Water use efficiency; Genotypes; Grain yield.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000700524

Agronomic performance of male-sterile and fertile maize genotypes at two plant populations
Provedor de dados: 65
Autores: Sangoi,Luís; Salvador,Ricardo.
This experiment was conducted in 1994 at Ames, Iowa, US to test whether cytoplasmic male-sterility can be used to decrease barrenness and to increase grain yield of maize at two plant populations. Four genotypes were tested: a hybrid (NK 6330) and an inbred, wifh sterile and fertile counterparts. Each genotype owas evaluated at plant populations equivalent to 25,000 and 75,000 pl. ha-1. Hybrids produced higher grain yield than inbreds at both plant populations. Gram yield was higher at 75,000 than at 25,000 pl. ha-1. No difference in gram yield, number of ears per plant, number of grains per ear, tassel length, and tassel number of branches was found between sterile and fertile counterparts of the inbred and hybrid, regardiess of plant population. Fertile...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Male-sterility; Stress; Gram yield.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781996000300006

AGRONOMIC PERFORMANCE OF SOYBEANS (Glycine max (L.) Merrill)) IN AN ORGANIC CROP ROTATION SYSTEM
Provedor de dados: 21
Autores: OLOWE, VICTOR; ADEJUYIGBE, CHRIS; OSHUNDIYA, FOLASAHDE; AJIBADE, FOLASHADE; AJIBOYE, OLAOLU; BAKARE, JEREMIAH.
Soybean was sown after sunflower, sesame and maize between 2008 and 2012 to assess its agronomic performance under continuous, rotational and conventional cropping systems. The experiment was laid out in a randomized complete block design and replicated four times. Soybean grown under rotational cropping system produced significantly (p&lt;0.05, F-test) higher number of branches, seeds and pods per plant than the soybean under continuous and conventional cropping systems in 2012. Similar trend was recorded in 2011 and 2012 for grain yield. On average the grain yield performance of soybean under rotational cropping system (2,445.0 – 2758.3 kg.ha-1) was superior to the yield of soybean under continuous and conventional cropping systems (1343.8 – 2556.3...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop husbandry.
Ano: 2014
URL: http://orgprints.org/22877/1/22877_OWC14_MM.pdf

Agronomic research of corn and sorghum 1982
Provedor de dados: 106
Autores: Supot Faungfupong; Porn Rungchang; Somchai Piyapantavanon; Pipat Weerathaworn; Sudarath Sakunkhu.
20 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Tillage; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบผลผลิตแบบหลายปัจจัย; การทดสอบพันธุ์; ข้าวโพดข้าวเหนียว; ความหนาแน่นของพืช; ระบบการไถพรวน; วัชพืช.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4111

Agronomic studies of corn and sorghum during 1977
Provedor de dados: 106
Autores: Supot Faungfupong; Wasana Wongyai; Kittima Montranon; Surapol Chowchong.
12 tables
Palavras-chave: Corn; Maize; Sorghum; Growth; Nitrate reductase; Agronomic characters; Dry weight; Nitrogen fertilizers; Weed control; Yields; ข้าวโพด; ข้าวฟ่าง; การเจริญเติบโต; การแข่งขันกับวัชพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3921

Agronomic studies of corn during 1981
Provedor de dados: 106
Autores: Supot Faungfupong; Porn Rungchang; Jarong Rungchuang; Yuanjai Onriabroy.
1 ill., 10 tables
Palavras-chave: Corn; Maize; Agronomic studies; Seed vigor; Variety trials; Yields; Quality; Agronomic characters; Systemic fungicides; Downy mildew; Planting density; Yields; ข้าวโพด; ความหนาแน่นของประชากร; ความแข็งแรงของเมล็ดพันธุ์; การทดสอบผลผลิต; สารกำจัดเชื้อรา.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4059

Agronomic study in corn during 1979
Provedor de dados: 106
Autores: Supot Faungfupong; Wasana Wongyai; Jarong Rungchuang; Prachum Jutawantana.
6 tables
Palavras-chave: Corn; Maize; Variety trials; Regional trials; Varieties; Yields; Agronomic characters; ข้าวโพด; การทดสอบพันธุ์; การทดสอบพันธุ์ในหลายท้องที่.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3970

Agronomy
Provedor de dados: 106
9 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizers; Varieties; Growth; Yields; Chainat paddy field; ข้าวโพด; ข้าวฟ่าง; การเพาะปลูก; การเขตกรรม.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3796

Agronomy and soil science discipline discussion
Provedor de dados: 106
Autores: Cunard, A.C.; Smeltzer, Dale G.
Palavras-chave: Corn; Maize; Agronomy; Soil science; Fertilizers; Varieties; ข้าวโพด; เขตกรรม; การวิจัยดิน.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3912

Alcances y limitaciones del uso de índices espectrales de la vegetación para la estimación de la evapotranspiración y biomasa en cultivos con diferentes densidades de follaje
Provedor de dados: 32
Autores: Odi Lara, María Magali.
En el presente trabajo fueron revisados los alcances y limitaciones de los índices  espectrales de la vegetación (IV) como herramienta para estimar evapotranspiración y  biomasa en cultivos con diferente densidad foliar (media: algodón, maíz, trigo y alta:  sorgo). Las relaciones entre las variables biofísicas y espectrales se analizaron dentro del  marco teórico de las líneas de igual vegetación (iso-IAF) en el espacio rojo-infra rojo  cercano, mediante IV (NDVIcp e IV_CIMAS) basados en la pendiente (b0) de las líneas  iso-IAF. El problema de rápida saturación de sus bandas evidencia sus limitaciones en  cultivos con alta densidad de follaje. Como alternativa se exploró el uso de una constante  aditiva (a0). La relación entre a0 y la fracción de cobertura...
Tipo: Tesis
Palavras-chave: Índices de vegetación; Densidad foliar; Sorgo; Evapotranspiración; Coeficiente de cultivo; FAO-56; Doctorado; Hidrociencias; Vegetation index; Leaf density; Sorghum; Crop-evapotranspiration; Crop- coefficient; FAO56-approach.
Ano: 2009
URL: http://hdl.handle.net/10521/1241

Alfa-tocopherol and beta-carotene in roughages and milk in organic dairy herds
Provedor de dados: 21
Autores: Mogensen, Lisbeth; Kristensen, Troels; Søegaard, Karen; Jensen, Søren K.; Sehested, Jakob.
The aim of the present study was to increase our knowledge about the vitamin content in roughage at harvest and during storage on organic commercial farms and to analyze the vitamin content in the milk. Roughages produced at the five organic dairy farms were monitored from harvest when the silage was laid in the silo and until the roughage was fed during the winter. The roughages had average α-tocopherol and β-carotene contents during the feeding period of, respectively, 30 mg and 21 mg per kg DM in grass-clover silage (after 281 days at storage), 13 mg and 8 mg per kg DM in maize wholecrop silage (stored for 194 days) and 28 mg and 9 mg per kg DM in cereal wholecrop silage (after 210 days from ensiling to feeding).   The average daily intake of...
Tipo: Journal paper
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2011
URL: http://orgprints.org/19448/7/19448.pdf

Algunos aspectos genéticos y bioquímicos de las atocianinas en poblaciones criollas de maíz de granos pigmentados
Provedor de dados: 32
Autores: Espinosa Trujillo, Edgar.
La variabilidad del color de grano en 114 poblaciones criollas de maíz se clasificó  en seis grupos, en el ciclo agrícola PV-2003. Se seleccionaron seis poblaciones, una  del blanco, una del amarillo, una del rojo (rojo-2), dos del azul (azul-1 y azul-2) y  una del púrpura (rojo-1), para establecer un sistema de cruzas dialélicas en el  ciclo agrícola PV-2004. En la F1 semilla de las cruzas hubo diferencias entre  progenitores, en la cantidad de antocianinas y su distribución en el pericarpio y  en la capa de aleurona. Los efectos aditivos (ACG) y maternos (EM) fueron  sobresalientes para el grosor del pericarpio y de la aleurona, para la  concentración de antocianinas en las mismas estructuras y para su concentración  por unidad de peso de grano (CAkg)....
Palavras-chave: Antocianinas; Pigmentos; Aptitud combinatoria; Maíz criollo; Heterosis anthocyanins; Natural pigments; Combining ability; Native maize; Populations; Heterosis.
Ano: 2012
URL: http://hdl.handle.net/10521/788

Algunos aspectos genéticos y bioquímicos de las atocianinas en poblaciones criollas de maíz de granos pigmentados
Provedor de dados: 32
Autores: Espinosa Trujillo, Edgar.
La variabilidad del color de grano en 114 poblaciones criollas de maíz se clasificó en seis grupos, en el ciclo agrícola PV-2003. Se seleccionaron seis poblaciones, una del blanco, una del amarillo, una del rojo (rojo-2), dos del azul (azul-1 y azul-2) y una del púrpura (rojo-1), para establecer un sistema de cruzas dialélicas en el ciclo agrícola PV-2004. En la F1 semilla de las cruzas hubo diferencias entre progenitores, en la cantidad de antocianinas y su distribución en el pericarpio y en la capa de aleurona. Los efectos aditivos (ACG) y maternos (EM) fueron sobresalientes para el grosor del pericarpio y de la aleurona, para la concentración de antocianinas en las mismas estructuras y para su concentración por unidad de peso de grano (CAkg). Por sus...
Tipo: Tesis
Palavras-chave: Antocianinas; Pigmentos; Aptitud combinatoria; Maíz criollo; Heterosis; Anthocyanins; Natural pigments; Combining ability; Native maize; Populations; Heterosis.
Ano: 2008
URL: http://hdl.handle.net/10521/1171

Algunos aspectos genéticos y bioquímicos de las atocianinas en poblaciones criollas de maíz de granos pigmentados
Provedor de dados: 32
Autores: Espinosa Trujillo, Edgar.
La variabilidad del color de grano en 114 poblaciones criollas de maíz se clasificó  en seis grupos, en el ciclo agrícola PV-2003. Se seleccionaron seis poblaciones, una  del blanco, una del amarillo, una del rojo (rojo-2), dos del azul (azul-1 y azul-2) y  una del púrpura (rojo-1), para establecer un sistema de cruzas dialélicas en el  ciclo agrícola PV-2004. En la F1 semilla de las cruzas hubo diferencias entre  progenitores, en la cantidad de antocianinas y su distribución en el pericarpio y  en la capa de aleurona. Los efectos aditivos (ACG) y maternos (EM) fueron  sobresalientes para el grosor del pericarpio y de la aleurona, para la  concentración de antocianinas en las mismas estructuras y para su concentración  por unidad de peso de grano (CAkg)....
Palavras-chave: Antocianinas; Pigmentos; Aptitud combinatoria; Maíz criollo; Heterosis anthocyanins; Natural pigments; Combining ability; Native maize; Populations; Heterosis.
Ano: 2012
URL: http://hdl.handle.net/10521/880

Allelopathic action of parthenium and its rhizospheric soil on maize as influenced by growing conditions
Provedor de dados: 87
Autores: Safdar,M.E.; Tanveer,A.; Khaliq,A.; Naeem,M.S.
Biosynthesis and subsequent release of allelochemicals by a plant into the environment is supposed to be influenced by its growing conditions. To ascertain what will be the allelopathic action of plant parts and rhizospheric soils of parthenium (Parthenium hysterophorus) growing at various farm locations with varied growing conditions, germination and seedling growth of maize hybrid (DK 6142) were assayed by sowing its seeds in petri plates lined with filter paper and pots filled with soil. Minimum germination percentage (30.0%), germination index (2.01), germination energy (36.3), seedling length (3.3 cm), seedling biomass (10 mg) and seedling vigor index (99.0) of maize were observed in leaf extract followed by fruit and whole plant extracts of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Parthenium hysterophorus; Plant bioassay; Soil bioassay; Zea mays; Phenolic compounds.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200001

Allelopathic bioactivity of fresh and infused aqueous extracts of Brazilian cherry (Eugenia uniflora L.) on lettuce and maize
Provedor de dados: 3
Autores: Boiago, Nayara Parisoto; Fortes, Andréa Maria Teixeira; Pilatti, Daiane Maria; Silva, Paulo Sérgio Siberti da.
 This study aimed to analyse the allelopathic bioactivity of fresh and infused aqueous extracts of Brazilian cherry leaves on the germination of lettuce and the initial development of maize. Brazilian cherry leaves were used to prepare a fresh aqueous extract (200 g L-1) and an infused extract (100 g L-1), which were diluted to concentrations of 0.4, 0.8, 1.2, 1.6 or 2.0% w/v. The variables evaluated in lettuce were the germination rate (GR), germination time index (GTI), germination speed index (GSI) and root length (RL). To determine the effect on the initial development of maize, we measured the shoot (SL) and root (RL) length. The experimental design included a factorial 2 × 5 design (two extracts and five concentrations), in addition to a control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.03.00.00-0; 2.03.03.00-9 Lactuca sativa; Zea mays; Allelopathy; Allelochemicals; Chemical ecology. Botânica; Fisiologia Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/40972

Allelopathic Influence of Sorghum Aqueous Extracts and Sorghum Powder on Germination Indices and Seedling Vigor of Hybrid Corn and Jungle Rice
Provedor de dados: 87
Autores: YAR,S.; KHAN,E.A.; HUSSAIN,I.; RAZA,B.; ABBAS,M.S.; MUNAZZA,Z.
ABSTRACT: Allelopathy has become a paramount tool for controlling weeds in crop plants without deteriorating the environment. Allelopathic effects of sorghum aqueous extracts and sorghum powder on a single cross maize (Zea mays L.) hybrid “HC-8080” and a summer weed, jungle rice (Echinochloa colona L.) were assessed in the research laboratory of Agronomy, Faculty of Agriculture, Gomal University, Dera Ismail Khan, KPK, Pakistan. The treatments included: T1: control (untreated check), T2: sorghum aqueous extract at a rate of 5 mL kg-1 soil, T3: sorghum aqueous extract at a rate of 10 mL kg-1 soil, T4: sorghum aqueous extract at a rate of 15 mL kg-1 soil, T5: sorghum powder at a rate of 5 g kg-1 soil, T6: sorghum powder at a rate of 10 g kg-1 soil and T7:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum allelopathy; Germination; Growth; Maize.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100205

Allelopathic Potential of Lavender’s Extract and Coumarin Applied as Pre-Plant Incorporated Into Soil Under Agronomic Conditions
Provedor de dados: 87
Autores: NAZEMI,A.H.; ASADI,G.A.; GHORBANI,R.
ABSTRACT: This study aimed to further explore that if coumarin and lavender’s extract, similar to greenhouse conditions, are phytotoxic towards some plant species under agronomic conditions. Before planting of maize, coumarin at 0, 250, 500, 1,000, 2,000, and 4,000 g h-1 and lavender’s aqueous extract at 0, 1,000, 2,000, 4,000, 8,000, and 16,000 mL h-1 were applied and incorporated into soil at a 3-5 cm depth. The density and biomass of weeds was significantly reduced by applying both compounds. The inhibition ability was also rate-dependent. Although the density and biomass of maize was also decreased at high rates, this crop showed higher tolerant to both compounds that all weeds.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Natural herbicides; Maize; Weeds.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100264

Alteración de la fertilidad del suelo por el cambio climático  su efecto en la productividad de maíz y trigo bajo riego
Provedor de dados: 32
Autores: Herrera Gómez, Sergio Santiago.
Se ha desarrollado la metodología de estimación de alteración de algunas  propiedades y un índice integral de fertilidad de los suelos irrigados de México  atribuible al cambio climático global durante el siglo XXI. Esta metodología fue  aplicada para evaluar la vulnerabilidad de la productividad de los cultivos de maíz de  grano y trigo bajo riego en algunos distritos de riego de referencia del país ubicados  en diferentes zonas climáticas. Los resultados de la investigación señalan que la  sensibilidad de los suelos agrícolas bajo riego en México, al cambio climático, es  mucho menor que los suelos de temporal y vírgenes y no afecta significativamente la  vulnerabilidad de los cultivos de maíz y trigo bajo riego. Por lo general, los valores de  cambio de...
Tipo: Tesis
Palavras-chave: Grano; Vulnerabilidad; Régimen hídrico; Índice; Propiedades; Maestría; Hidrociencias; Grain; Vulnerability; Water regime; Index; Properties.
Ano: 2008
URL: http://hdl.handle.net/10521/1242

Alteración de la fertilidad del suelo por el cambio climático y su impacto en la productividad de frijol.
Provedor de dados: 32
Autores: Terrazas Mendoza, Liliana.
La estimación de la vulnerabilidad de la productividad agrícola en México por efectos del cambio climático global esperado, ha sido realizada principalmente para varios cultivos, sin considerar la alteración de fertilidad del suelo por el mismo cambio climático. En Algunos trabajos donde sí considera la alteración de la fertilidad del suelo corresponden a los cultivos de maíz y trigo. Uno de los cultivos de gran importancia nacional es el frijol. El objetivo principal del presente trabajo fue estimar el papel de modificación del índice integral de fertilidad del suelo en los cálculos de la productividad del cultivo de frijol en los sitios de referencia ubicados en diferentes partes del país con producción bajo las condiciones de temporal y riego. Se ha...
Palavras-chave: Ley geográfica de zonificación de suelos; Indice climático; Indice integral de fertilidad; Geographic law of soil zonality; Climatic index; Integral soil fertility index; Maestría; Hidrociencias.
Ano: 2011
URL: http://hdl.handle.net/10521/377

Alterações da fertilidade do solo cultivado com milho e caupi submetidos à calagem e adubação química, em Irituia-PA.
Provedor de dados: 14
Autores: OLIVEIRA, R. F. de; GALVÃO, E. U. P.
bitstream/item/34445/1/ORIENTAL-BP13.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Recuperacao de area degradada; Cultivo sequencial; Feijao-de-porco; Caupi; Irituia; Pará; Brasil; Reclamation; Plant soil relations; Maize.; Calagem; Consorciação de Cultura; Fertilidade do Solo; Feijão de Corda; Milho; Relação Solo-Planta.; Amazonia; Environmental degradation; Cowpeas; Liming; Intercropping; Soil fertility.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377394

Alterações induzidas pelo alumínio nos conteúdos de proteínas e carboidratos no ápice de radículas de milho
Provedor de dados: 1
Autores: Hoshino, Andrea Akemi; UEM; Boni, Talge Aiex; UEM; Prioli, Alberto José; UEM; Bravo, Juliana Pereira; UEM; Prioli, Sonia Maria Alves Pinto; UEM.
Os solos ácidos contêm alumínio que dificulta o desenvolvimento de plantas sensíveis pela diminuição da atividade mitótica nas raízes. Neste trabalho objetivou-se evidenciar alterações, induzidas pelo alumínio, nos conteúdos de proteínas e carboidratos no ápice da radícula de milho. Plântulas de dois híbridos, um tolerante e um sensível, foram desenvolvidas em solução nutritiva com quatro concentrações de alumínio. Não houve interação entre genótipos e concentrações de alumínio, mas os níveis de alumínio influenciaram diferentemente os conteúdos de proteínas e carboidratos. A presença do alumínio induziu alterações nas duas características, mas a magnitude da resposta pareceu ser independente da concentração do íon. A resposta para proteínas não diferiu...
Palavras-chave: 5.00.00.00-4 Ciências Agrárias tolerância ao alumínio; Milho; Proteínas; Carboidratos 5.00.00.00-4 Ciências Agrárias.
Ano: 2000
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2817

Alterações morfológicas no sistema radicular do milho (Zea mays L.) induzidas por fungos micorrízicos e adição de P.
Provedor de dados: 14
Autores: BRESSAN, W.
bitstream/item/36059/1/Pesq.And.-42.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Maize; Mycorrhiza; Radicular system.; Fósforo; Micorriza; Milho; Sistema Radicular; Zea Mays.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/483410

Alterations in core histone variant ratios during maize root differentiation, callus formation and in response to plant hormone treatment
Provedor de dados: 48
Autores: ALATZAS,ANASTASIOS; FOUNDOULI,ATHINA.
Although several histone variants have been studied in both animal and plant organisms, little is known about their distribution during processes that involve alterations in chromatin function, such as differentiation, dedifferentiation and hormone treatment. In this study we evaluated the ratio of each histone variant in each of the four core histone classes in the three developmental zones of maize (Zea mays L.) root and in callus cultures derived from them, in order to define possible alterations either during plant cell differentiation or dedifferentiation. We also evaluated core histone variant ratios in the developmental zones of roots treated with auxin and gibberellin in order to examine the effects of exogenously applied plant hormones to histone...
Tipo: Journal article
Palavras-chave: Callus culture; Histone variant; Plant cell differentiation; Plant hormone; Zea mays.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000400006

Alternativas de controle químico de plantas daninhas na cultura do milho.
Provedor de dados: 14
Autores: KARAM, D.; PEREIRA FILHO, I. A.
bitstream/item/30882/1/ct-22.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Planta daninha; Maize; Weed.; Controle Químico; Milho; Zea Mays.; Chemical control.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484453

Alternativas para o cultivo do algodoeiro herbáceo em plantio direto no Cerrado.
Provedor de dados: 14
Autores: CORRÊA, J. C.; AGUIAR, J. L. P.
RESUMO: O experimento , instalado em um Latossolo Vermelho-Amarelo muito argiloso, teve o objetivo de obter melhor alternativa para o cultivo do algodoeiro herbáceo (Gossypium hirsutum L. r. latifolium Hutch) em plantio direto em condições de sequeiro no Cerrado. O delineamento experimental foi o de blocos casualizados com quinze tratamentos e quatro repetições. Os tratamentos foram os seguintes: soja-milheto-soja-milheto-algodoeiro (T1); soja-amaranto-soja-nabo-forrageiro-algodoeiro (T2); soja-sorgo granífero-soja-sorgo granífero-algodoeiro (T3); soja-aveia-preta-algodoeiro (T4); feijão-milheto-feijão-milheto-algodoeiro (T5); feijão-amaranto-feijão-nabo-forrageiro-algodoeiro (T6); feijão-sorgo-granífero-feijão-sorgo-granífero-algodoeiro (T7);...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Planta daninha; Biomassa aérea; Zero tillage; Cover plants; Aerial biomass.; Algodão Herbáceo; Cerrado; Gossypium Hirsutum; Planta de Cobertura; Plantio Direto.; Cotton; Weeds.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568990

Alternative Approaches for Moderating Food Insecurity and Price Volatility in Zambia.
Provedor de dados: 31
Autores: Dorosh,   Paul A.; Dradri,   Simon; Haggblade,   Steven.
• Maize production varies widely from year to year, given Zambia’s heavy dependence on rainfed cultivation. Thus consumers face wide swings in availability of their primary food staple. • Typical public responses include increased food aid inflows, government commercial imports and stock releases, and tight controls on private sector trade. While intended to improve domestic supply, these public responses can inadvertently exacerbate price instability and food insecurity for Zambian consumers. • Two key private sector responses – private cross-border maize trade and consumer substitution of alternate food staples (such as cassava) for maize - can also help to moderate food consumption volatility. • Together, private imports and increased cassava...
Tipo: Report
Palavras-chave: Food security; Food policy; Zambia; Food Security and Poverty; Q20.
Ano: 2007
URL: http://purl.umn.edu/54630

Alternative Hedging Strategies in Maize Production to Cope with Climate Variability and Change
Provedor de dados: 31
Autores: Fuhrer,   Jurg; Beniston,   Martin; Calanca,   Pierluigi; Torriani,   Daniele Simone.
Climate change with increasing climate variability is likely to alter risks in agricultural production. The effectiveness of using weather derivatives to hedge against drought risks for rain-fed grain maize production was investigated for current (1981-2003) and future (2070- 2100) climates in Switzerland. The climate change scenario was extrapolated from results of a regional climate model (HIRHAM4) based on the IPCC A2 emission scenario. In addition, a sensitivity analysis was performed by varying the mean and variance of the initial probability space for the seasonal precipitation sum. Profits and risks with and without hedging were compared using the analogy of the value-at-risk measure (VaR), i.e., a quantile-based measure of risk. A Monte Carlo chain...
Tipo: Conference Paper or Presentation
Palavras-chave: Climatic change; Climate risks; Drought; Maize production; Weather derivatives; Hedging; Crop Production/Industries; Environmental Economics and Policy; Risk and Uncertainty.
Ano: 2007
URL: http://purl.umn.edu/9275

Alternative Instruments for Ensuring Food Security and Price Stability in Zambia
Provedor de dados: 31
Autores: Dorosh,   Paul A.; Dradri,   Simon; Haggblade,   Steven.
Given heavy dependence on rainfed maize production, Zambia must routinely cope with pronounced production and consumption volatility in their primary food staple. Typical policy responses include increased food aid flows, government commercial imports and stock releases, and tight controls on private sector trade. This paper examines recent experience in Zambia, using a simple economic model to assess the likely impact of maize production shocks on the domestic maize price and on staple food consumption under alternative policy regimes. In addition to an array of public policy instruments, the analysis evaluates the quantitative impact of two key private sector responses in moderating food consumption volatility— private cross-border maize trade and...
Tipo: Report
Palavras-chave: Food security; Policy; Zambia; Africa; Price; Crop Production/Industries; Food Security and Poverty; Q18.
Ano: 2007
URL: http://purl.umn.edu/54488

Alternative intensive cropping with corn
Provedor de dados: 18
Autores: Sojka, R.E.; Busscher, W.J.
Please contact the NWISRL if you have a copy of this publication.
Tipo: Technical Bulletin
Palavras-chave: Corn / maize; Mass Import - autoclassified (may be erroneous).
Ano: 1991

Alternative intensive cropping with corn
Provedor de dados: 18
Autores: Sojka, R.E.; Busscher, W.J.
Tipo: Conference or Workshop Item
Palavras-chave: Corn / maize; Mass Import - autoclassified (may be erroneous).
Ano: 1991
URL: http://eprints.nwisrl.ars.usda.gov/906/1/739.pdf

Alternative products in the "in vitro" inhibition of Sclerotinia sclerotiorum
Provedor de dados: 63
Autores: Mello,Alexandre Furtado Silveira; Lourenço,Silvia de Afonseca; Amorim,Lilian.
The white mold, caused by Sclerotinia sclerotiorum, is a very important disease in tomato crops. The objective of this work was to study the effect of plant extracts, animal residues and industrial by-products extracts on the fungus in vitro growth. Treatments consisted of different concentrations of pyrolignous oil, neem oil, monosodium glutamate, sewage sludge and organic compost [coffee residue (50%) coal residue (10%), maize residue (25%), poultry waste (12.5%), poultry meal (2.5%)]. Positive control consisted of Petri dishes with PDA medium and negative control treatment consisted of PDA medium with procymidone. Fungus colonies were incubated at 22ºC and light intensity of 260 lux. Variables such as mycelium growth rate, sclerotia production, and...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Azadirachta indica; Sclerotinia white rot; Alternative control; Sewage sludge; Soil respiration.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000200014

Alternative Soil Fertility Management Options in Malawi - An Economic Analysis
Provedor de dados: 31
Autores: Sauer,   Johannes; Tchale,   Hardwick.
In this paper, we analyze the factors that influence the productivity of maize among smallholder farmers, given that unfavourable output and input market conditions throughout the 1990s have compelled smallholder farmers into unsustainable agricultural intensification. We use farm-household survey data in order to compare the productivity of smallholder maize production under integrated (ISFM) and chemical-based soil fertility management using a normalized translog yield response model. The results indicate higher maize yield responses for integrated soil fertility management options after controlling for the intensity of fertilizer application, labour intensity, seed rate, land husbandry practices as well as selected policy factors. The estimated model is...
Tipo: Conference Paper or Presentation
Palavras-chave: Malawi; Smallholder agriculture; Soil fertility management; Yield response model; Livestock Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/21423

Alternative Soil Fertility Management Options in Malawi – An Economic Analysis
Provedor de dados: 31
Autores: Sauer,   Johannes; Tchale,   Hardwick.
In this paper, we analyze the factors that influence t he productivity of maize among smallholder farmers, given that unfavourable output and input market conditions throughout the 1990s have compelled smallholder farmers into unsustainable agricultural intensification. We use farm-household survey data in order to compare the productivity of smallholder maize production under integrated (ISFM) and chemicalbased soil fertility management using a normalized translog yield response model. The results indicate higher maize yield responses for integrated soil fertility management options after controlling for the intensity of fertilizer application, labour intensity, seed rate as well as land husbandry practices a s well as selected policy factors. The...
Tipo: Conference Paper or Presentation
Palavras-chave: Smallholder agriculture; Yield response model; Soil fertility management; Malawi; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/25407

Alternative sources of potassium for maize cultivation
Provedor de dados: 64
Autores: Boldrin,Paulo Fernandes; Souto,Hugo Ferreira; Salles,Lenise Selaysim; Furtini Neto,Antonio Eduardo.
ABSTRACT Brazil is the largest importer of potassium (K) fertilizers in the world, importing about 95% of all the potassium consumed by its agriculture. Thus, new sources and technologies to increase K availability have been studied. This study aimed to evaluate the agronomic viability of the use of calcined glauconite and phonolite blended and granulated with two organic materials on maize growth in pots, using two soils of contrasting texture in a controlled environment. Were evaluated eight sources of potassium: phonolite; phonolite + poultry manure; phonolite + cattle manure; calcined glauconite; calcined glauconite + poultry manure; calcined glauconite + cattle manure; negative control (no K); and positive control (K - KCl), and two soils of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Phonolite; Calcined glauconite.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100247

Alternativen im und zum Silomaisanbau im Ökologischen Landbau
Provedor de dados: 21
Autores: Graß, Rüdiger; Scheffer, Konrad.
In einem Demonstrationsvorhaben wurden vier unterschiedliche Maisanbausysteme mit den Alternativvarianten Futterrüben, Futterhirse (Ganzpflanzensilage = GPS) und Triticale-GPS verglichen. Die Maisvarianten waren den Alternativvarianten hinsichtlich des Ertrags, des Futterwertes, des Energieertrags und der Wirtschaftlichkeit z.T. sehr deutlich überlegen. Nur die Maisvariante mit engerem Reihenabstand schnitt schlechter ab und lag auf ähnlichem Niveau wie die Alternativvarianten. Das hing mit der höheren Bestandesdichte zusammen, die gerade in so einem hinsichtlich der Witterung extremen Jahr wie 2003 zu Trockenstress und Ertragseinbußen führte.  Die höhere Wirtschaftlichkeit des Mais gegenüber den Alternativvarianten ist in den höheren Erträgen, der...
Tipo: Report
Palavras-chave: Root crops.
Ano: 2003
URL: http://orgprints.org/15662/1/15662%2D02OE463%2Duni_kassel%2Dgrass%2D2003%2Dsilomais.pdf

Alternativen im und zum Silomaisanbau im Ökologischen Landbau
Provedor de dados: 21
Viele Rinderbetriebe des Ökologischen Landbaus bauen trotz ihres Interesses am Silomaisanbau und eines großen Bedarfs an einem energiereichen Grundfuttermittel keinen Silomais an. Dies hängt mit Anbauproblemen und der Umweltgefährdung beim Silomaisanbau zusammen (Bodenerosion, Nitratauswaschung, aufwändige Unkrautregulierung), die bei herkömmlichen Anbau- systemen häufig auftreten. Zur Deckung des Energiebedarfs werden daher andere Futterpflanzen (Getreideganzpflanzensilagen) angebaut. Diese sind i.d.R. aber weniger ertragreich als der Silomais und weisen eine geringere Energiedichte auf. Daher wächst das Interesse am Maisanbau im Ökologischen Landbau und damit die Nachfrage aus der Praxis nach Lösungsansätzen für die genannten Probleme. In diesem Projekt...
Tipo: Project description
Palavras-chave: Root crops.
Ano: 2023

Amanita grallipes, a new species in Amanita subsection Vittadiniae from southern Brazil
Provedor de dados: 16
Autores: Bas, C.; Meijer, A.A.R. de.
Amanita grallipes, a new species from the State of Parand in southern Brazil, belonging to Amanita sect. Lepidella subsect. Vittadiniae, is extensively described and illustrated. It is well-characterized by a long, slightly rooting stipe with a non-bulbous base and scattered remnants of the universal veil, a dark brown pileus with dark brown warts, lamellae turning maize yellow, ellipsoid spores shorter than 9.5 µm and the presence of clamp-connections.
Tipo: Article / Letter to the editor
Ano: 1993
URL: http://www.repository.naturalis.nl/record/531632

Aminoácidos Digestíveis Verdadeiros do Milheto, do Milho e Subprodutos do Milho, Determinados com Galos Adultos Cecectomizados
Provedor de dados: 96
Autores: Rodrigues,Paulo Borges; Rostagno,Horacio Santiago; Albino,Luiz Fernando Teixeira; Gomes,Paulo Cezar; Barboza,Walter Amaral; Nunes,Ricardo Vianna.
Os coeficientes de digestibilidade e o conteúdo de aminoácidos digestíveis verdadeiros do milho e seus subprodutos e do milheto foram determinados utilizando-se galos cecectomizados, em que 11 alimentos testados foram fornecidos a seis galos (15 g pela manhã e 15 g à tarde, após jejum de 24 horas) e seis galos foram mantidos em jejum para determinação das perdas endógenas. Após obtidos os coeficientes de digestibilidade e calculados os aminoácidos digestíveis, ajustaram-se equações para predizer a composição do milho e seus subprodutos em lisina (LIS), metionina (MET), metionina + cistina (M+C), treonina (TRE) e arginina (ARG), totais e digestíveis, em função da composição em proteína bruta (PB), fibra bruta (FB), extrato etéreo (EE) e matéria mineral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aminoácidos digestíveis; Galos cecectomizados; Milheto; Milho; Equações de predição.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982001000800014

Ammonia volatilization and yield components after application of polymer-coated urea to maize
Provedor de dados: 90
Autores: Zavaschi,Eduardo; Faria,Letícia de Abreu; Vitti,Godofredo Cesar; Nascimento,Carlos Antonio da Costa; Moura,Thiago Augusto de; Vale,Diego Wyllyam do; Mendes,Fernanda Latanze; Kamogawa,Marcos Yassuo.
A form of increasing the efficiency of N fertilizer is by coating urea with polymers to reduce ammonia volatilization. The aim of this study was to evaluate the effect of polymer-coated urea on the control of ammonia volatilization, yield and nutritional characteristics of maize. The experiment was carried out during one maize growing cycle in 2009/10 on a Geric Ferralsol, inUberlândia, MG, Brazil. Nitrogen fertilizers were applied as topdressing on the soil surface in the following urea treatments: polymer-coated urea at rates of 45, 67.5 and 90 kg ha-1 N and one control treatment (no N), in randomized blocks with four replications. Nitrogen application had a favorable effect on N concentrations in leaves and grains, Soil Plant Analysis Development (SPAD)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen; Polymer-coated urea; N fertilizer; Ammonia volatilization; Zea mays; SPAD reading.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400016

Ammonia volatilization from enhanced-efficiency urea on no-till maize in brazilian cerrado with improved soil fertility
Provedor de dados: 64
Autores: Cancellier,Eduardo Lopes; Silva,Douglas Ramos Guelfi; Faquin,Valdemar; Gonçalves,Bruno de Almeida; Cancellier,Leandro Lopes; Spehar,Carlos Roberto.
ABSTRACT High nitrogen losses by ammonia volatilization are expected when urea is used as the source of N. The use of controlled-release urea and urease inhibitors are possible strategies to reduce such losses and increase nitrogen use efficiency. This study aimed to evaluate nitrogen losses by ammonia volatilization from stabilized, slow and controlled release urea and its absorption by maize grown under no-till in an improved Cerrado soil. Four N sources were used: conventional urea, urea + N-(n-butyl) thiophosphoric triamide (NBPT), urea + Cu and B and urea coated by sulfur + polymers. These N sources were surface applied along the rows using three N doses of 100, 150 and 200 kg ha-1. No N was added to the control. Data were collected regarding N losses...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fertilizers; NH3-N losses; Polymer sulfur coated urea; Urease inhibitors; Zea mays L.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200133

Ammonia volatilization from nitrogen fertilizers in no-till wheat and maize in southern Brazil
Provedor de dados: 90
Autores: Viero,Fernando; Bayer,Cimélio; Fontoura,Sandra Mara Vieira; Moraes,Renato Paulo de.
Crop residues on the soil surface of no-till systems can intensify ammonia volatilization from N fertilizers applied to cereal crops. This study assessed the magnitude of N losses through ammonia volatilization from urea applied to no-till winter (wheat) and summer crops (maize) on a Typic Hapludox in the south-central region of Paraná, southern Brazil. In addition, the potential of alternative N sources (urea with urease inhibitor, liquid fertilizer, ammonium nitrate and ammonium sulfate) and different urea managements (fertilizer applied in the morning or afternoon) were evaluated. Two experiments with maize and wheat were carried out for two years, arranged in a randomized block design with four replications. Nitrogen volatilization losses were assessed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fertilization; Efficiency; Yield.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500017

Ammonium excretion, auxin production and effects of maize inoculation with ethylenediamine-resistant mutants of Pseudomonas sp.
Provedor de dados: 53
Autores: Ramos,Luan da Luz; Rodrigues,Elisete Pains; Silva,Mayara Barbosa; Oliveira,Jessica Ellen; Zuluaga,Mónica Yorlady Alzate; Milani,Karina Maria Lima; Oliveira,André Luiz Martinez de.
ABSTRACT Plant growth-promoting bacteria (PGPB) comprise part of plant microbiome of biotechnological interest due to their potential to decrease the use of agrochemicals in agriculture. Among the commonly found PGPB species, the Pseudomonas genus is known for high competitiveness and efficiency in expressing growth-promotion traits. To increase the contribution of diazotrophic Pseudomonas sp. to the plant nitrogen nutrition, the strain AZM-01 was chemically mutagenized with methyl methanesulfonate (MMS), following the selection for resistance to ethylenediamine (EDA). From the 13 EDA-resistant mutant strains selected, four showed increased the ammonium excretion, with the highest value reaching up to 284% increase as compared to the wild strain, and six...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofertilizer; Plant inoculation; Methyl methanesulphonate; Plant growth-promoting bacteria.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000300415

Ammonium sulphate on maize crops under no tillage
Provedor de dados: 53
Autores: Silva,Maria Anita Gonçalves da; Mannigel,Anny Rosi; Muniz,Antonio Saraiva; Porto,Simone Maria Altoé; Marchetti,Marlene Estevão; Nolla,Antonio; Bertani,Rosemary Marques de Almeida.
The objectives of this work were to evaluate the management of N and S (as ammonium sulphate) fertilization under no-tillage system on the components of maize productivity and on N and S accumulation in the crop, as well as to evaluate the minimum value of the Nitrogen Sufficiency Index (NSI 0.95) as an indicator for side dressing requirements. The experiment had a completely randomized block design with six treatments and four replications carried out in Red Latosol dystrophic soil (Hapludox), in Campo Mourão, Paraná State, where the following treatments in summer growth maize were applied: T1- 120 kg ha-1 N in seeding; T2- 120 kg ha-1 N in side dressing; T3- 40 kg ha-1 N in seeding and 80 kg ha-1 N in side dressing; T4- 30 kg ha-1 N in seeding and 90 kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Triticum aestivum; Fertilizer management; Nitrogen; Sulfur.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052012000100014

Amylose content and micromorphology of popcorn progenies with different popping expansion volumes
Provedor de dados: 65
Autores: Freire,Ana Izabella; Castro,Elisa de Melo; Pereira,Ariana Mota; Cruz,Renata Ranielly Pedroza; Souza,Filipe Bittencourt Machado de; Chagas,Wantuir Filipe Teixeira; Souza,João Cândido de.
ABSTRACT: Popcorn (Zea mays var. everta) has a higher commercial value than common maize, in addition to being a popular food among consumers. Today, there is a constant search for cultivars with superior performance for several traits of interest in the case of popcorn, yield and popping expansion. On this basis, this project proposes to characterize progenies of popcorn with different values ​​of expansion capacity regarding chemical composition and micromorphology. Kernels from the fifth cycle (C5) of intrapopulation recurrent selection were evaluated. The progenies were selected based on the popping expansion volume of their kernels. The kernels were quantified for amylose and analyzed for starch granule arrangement and pericarp thickness by scanning...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays var. everta; Endosperm; Pericarp; Starch granule; Thickness.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200401

An Analysis of Alternative Maize Marketing Policies in South Africa
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Hajek,   Milan; van Zyl,   Johan.
The maize-oriented agricultural economies throughout Southern Africa are in fundamental transition. Increased recognition of the costs of historical controls on pricing and marketing already has led to partial maize market liberalization in several countries in the region. However, there is still intense debate over the appropriate scope and implementation of future food market reform. Much of the debate derives from uncertainty over the consequences of comprehensive and politically risky changes to domestic markets, especially at a time when regional market conditions are also in flux due to agricultural restructuring in neighboring countries. There is currently little information on the direction and magnitude of grain trade between South Africa,...
Tipo: Report
Palavras-chave: Food security; Food policy; Maize market; Crop Production/Industries; Marketing; Q13.
Ano: 1995
URL: http://purl.umn.edu/54700

An analysis of factors contributing to the use of an income equalisation deposit scheme by commercial farmers in South Africa
Provedor de dados: 31
Autores: Lishman,   J.-L.; Nieuwoudt,   W. Lieb.
Recent research suggests that an Income Equalisation Deposit (IED) scheme could be a feasible new risk management tool for commercial farmers in South Africa. This prompted a study of practicing consultants’ (tax experts) views on determining what types of farmers would be likely to use the scheme. During 2000, a postal survey of 24 consultants was conducted mainly in KwaZulu-Natal, and in the Maize Triangle and surrounding areas. Each consultant was to review nine scenarios (eight plus a control, giving 192 observations) and decide whether they would recommend an IED scheme for each scenario. A statistical experimental design was used to structure the scenarios, allowing for main and interaction effects between variables that could influence the potential...
Tipo: Journal Article
Palavras-chave: Agricultural Finance.
Ano: 2003
URL: http://purl.umn.edu/9501

An analysis of the bottlenecks affecting the production and deployment of maize seed in Eastern and Southern Africa
Provedor de dados: 31
Autores: Langyintuo,   Augustine S.; Mwangi,   Wilfred; Diallo,   Alpha O.; MacRobert,   John F.; Dixon,   John; Banziger,   Marianne.
The publication describes outcomes of a study conducted in 2007/08 to analyze the bottlenecks affecting the production and deployment of maize seed in eastern and southern Africa. The objectives of the study were to provide a better understanding of the factors limiting the production and deployment of improved maize seed in Africa, and to contribute to increasing the efficiency of variety release, seed production and seed dissemination for new drought tolerant maize varieties. The study identified a number of institutional bottlenecks affecting the maize seed value chain, in particular in the area of policy, credit availability, seed production, germplasm and marketing. To address these bottlenecks and improve the efficiency of seed production and...
Tipo: Report
Palavras-chave: Seed production; Seed industry; Commodity markets; Marketing; Maize; Zea mays; Agricultural products; Yields; Crop yield; Crop Production/Industries; E10; E16; E21; E70; F03.
Ano: 2008
URL: http://purl.umn.edu/56189

An analysis of the challenges of the maize seed industry in eastern and southern Africa
Provedor de dados: 31
Autores: Langyintuo,   Augustine S.; Mwangi,   Wilfred; Diallo,   Alpha O.; MacRobert,   John F.; Dixon,   John; Banziger,   Marianne.
The liberalization and restructuring of the seed sector in eastern and southern Africa (ESA) during the past two decades have witnessed a proliferation of private seed companies in the maize seed industry (Hassan et al., 2001; Lemonius, 2005). Although the total number of registered maize seed companies increased from 8 and 11, respectively, in 1997 to 40 each, the quantities of seed marketed barely doubled, increasing from 23,000 and 27,000 tons to 53,000 and 51,000 tons, respectively; an indication that the reforms are insufficient in ensuring efficient functioning of the sector in the two regions. A study involving 117 seed providers, representing 92 percent of all registered maize seed companies in ESA in 2007 identified bottlenecks that have...
Tipo: Conference Paper or Presentation
Palavras-chave: Keywords: Maize seed industry; Seed policies; Eastern and southern Africa; Institutional and Behavioral Economics; International Development; Marketing; D21; M31; O32.
Ano: 2009
URL: http://purl.umn.edu/51713

AN ANALYSIS OF THE EFFECTS OF GOVERNMENT FOOD GRAIN PRICE POLICIES IN SOMALIA, 1971-1983
Provedor de dados: 31
Autores: Wehelie,   Yassin J.
This paper is a retrospective analysis of the effects of Somalia's price policies for maize and sorghum between 1971 and 1983.  Maize and sorghum are the two most important dietary staple foods and represent over 96 percent of the cereal production of the country.  Since the early 1970's, the government has pursued an economic policy framework which emphasized the public sector and parastatals were given a prominent role in agricultural production and marketing activities.  Private trade in maize and sorghum was banned during this period, and a government agency took over the grain marketing and distribution activities in the country.  Despite the government's goals to increase cereal production, maize and sorghum output stagnated during the period and...
Tipo: Thesis or Dissertation
Palavras-chave: Agricultural and Food Policy.
Ano: 1985
URL: http://purl.umn.edu/11147

An Analysis of the Recent Evolution of Mali’s Maize Subsector
Provedor de dados: 31
Autores: Diallo,   Amadou Sekou.
In most developing countries, historically, the main strategy for improving the food sector has focused on increasing farm-level production. But in recent years, with the emphasis on value chain analysis, there has been much more focus on subsector studies, demand-driven approaches, and improving vertical coordination to assure product quality to final consumption markets. Millet, sorghum, and later rice were the traditional leading three cereal crops produced and consumed in Mali. Maize has trailed them for more than two decades, but from mid 1990s on, it has been produced and consumed in much larger quantities. Given the potentials of maize, developing and better organizing its subsector has the potential to not only increase revenues for maize farmers,...
Tipo: Thesis or Dissertation
Palavras-chave: Maize; Value chain; Mali; Cereals; Food security; Agricultural marketing; Livestock feed; Industrial organization; Agribusiness; Agricultural and Food Policy; Food Security and Poverty; International Development; Marketing; L11-Production; Pricing; And Market Structure; Size Distribution of Firms; N57-Africa; Oceania; O17-Formal and Informal Sectors; Shadow Economy; Institutional Arrangements; O33-Technological Change: Choices and Consequences; Diffusion Processes; Q12-Micro Analysis of Farm Firms; Farm Households; And Farm Input Markets; Q13-Agricultural Markets and Marketing; Cooperatives; Agribusiness; Q18-Agricultural Policy; Food Policy.
Ano: 2011
URL: http://purl.umn.edu/101316

An architectural approach to investigate maize response to low temperature
Provedor de dados: 26
Autores: Chenu, K.; Fournier, C.; Andrieu, B.; Giauffret, C.
In maize, grain yield is highly associated with light interception and photosynthetic activity during grain filling. In Europe, this period typically occurs when solar radiation is already decreasing and water availability may be limiting. The improvement of cold-tolerance is a major challenge for maize production because earlier sowing would allow a better fit between crop cycle and availability of natural resources. Low temperatures have a major impact on (i) radiation interception through the modification of foliage development and (ii) radiation use efficiency (RUE) through the reduction of leaf photosynthetic activity. Little is known about the specific contribution of each of these traits to the lower biomass production under cold conditions and...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1306

AN ECONOMETRIC ANALYSIS OF THE SUPPLY OF MAIZE IN LESOTHO
Provedor de dados: 31
Autores: Phoofolo,   Marabe.
Lesotho is largely agrarian.  More than 90 percent of the Basotho population lives in rural areas.  Agriculture provides an important source of income for over 50 percent of the rural population and is the largest contributor to GDP.  Apart from migrant labour in the Republic of South Africa (RSA) and limited work in administration and commerce in the few urban centers, there are few employment opportunities other then agriculture. Under production of maize coupled with a growing population has lead to great shortages of maize in Lesotho.  The hunger and nutritional problems associated with the maize shortage problem prompted the Government of Lesotho to set out self-sufficiency goals, which if met would help solve the maize shortage problem.   In view of...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries.
Ano: 1980
URL: http://purl.umn.edu/11239

AN ECONOMETRIC MODEL OF THE SADC MAIZE SECTOR
Provedor de dados: 31
Autores: Cutts,   Michela; Hassan,   Rashid M.
In almost all of the Southern Africa Development Community (SADC) countries maize is cropped on a commercial basis except in Mauritius and Seychelles. Maize meal is the most important food staple in Southern and Eastern Africa. This is one of the main reason many governments in the region implement various policies to protect the maize sector.  With adoption of the Uruguay Round Agreement on Agriculture (URAA) in the late 1990s, there has been a wave of market liberalization in the region. Maize production and marketing have seen major reforms with the URAA, market liberalization, and the Structural Adjustment Programs (SAPs). Private sector participation in the supply of maize inputs (improved seed and fertilizer) and grain marketing has steadily...
Tipo: Conference Paper or Presentation
Palavras-chave: International Relations/Trade; Productivity Analysis.
Ano: 2003
URL: http://purl.umn.edu/19075

An Economic Analysis of the Abonera Maize Production System in the Atlantic Coast of Honduras
Provedor de dados: 31
Autores: Sain,   Gustavo; Buckles,   Daniel.
This paper compares the economics of the abonera maize production system, in which maize is grown in rotation with a green manure crop (velvetbean, Mucuna deeringiana), with traditional bush-fallow cultivation of maize in the Atlantic Coast area of Honduras. A probabilistic cost-benefit analysis of introducing velvetbean into the existing maize cropping pattern is carried out for the field, farm, and regional level. The probabilistic approach allows for a more comprehensive assessment of economic profitability, one which recognizes that farmers are interested in reducing production risk as well as obtaining increases in average net benefits. The analysis reveals that the abonera system provides significant returns to land and family labor over the six-year...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/7676

An Economic and Institutional Analysis of Maize Research in Kenya
Provedor de dados: 31
Autores: Karanja,   Daniel David.
Maize, the most important food crop in Kenya, contributes 44 percent of the per-capita, calorie intake. Increases in maize production over the past three decades have been attributed to the availability and adoption of modern maize techniques, especially fertilizer and hybrid seed. This paper estimates the rate of return to maize research to be 53 to 61 percent, and reveals that his impact was aided by complementary agricultural extension and seed multiplication and distribution programs. The paper describes the institutional framework that may have led to one of Kenya’s agricultural research success stories. It also poses challenges to the future of maize production in Kenya.
Tipo: Report
Palavras-chave: Food security; Food policy; Maize; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; Downloads July 2008 - July 2009: 19; O18.
Ano: 1996
URL: http://purl.umn.edu/54693

An economic assessment of banana genetic improvement and innovation in the Lake Victoria Region of Uganda and Tanzania
Provedor de dados: 31
Autores: Tushemereirwe,   Wilberforce K.
This research report highlights the findings from a set of studies undertaken by the International Food Policy Research Institute, along with several national and international research institutions, to assess the economic impact of improved cultivars and management practices on smallholder farmers in the Lake Victoria Region of Uganda and Tanzania— an area where the cooking banana is both economically and culturally important. Genetic transformation is a promising alternative for improving the resistance of banana plants to the pests and diseases that cause serious economic losses, because bananas, unlike rice, wheat, and maize, are difficult to improve through conventional breeding techniques. The team of researchers posed three broad questions: What is...
Tipo: Report
Palavras-chave: Bananas; Genetic engineering; Economic aspects; Uganda; Tanzania; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007
URL: http://purl.umn.edu/37876

An economic evaluation of a crop insurance programme for small-scale commercial farmers in South Africa
Provedor de dados: 31
Autores: Nieuwoudt,   W. Lieb.
Hail insurance is provided by the private sector in South Africa but crop insurance (drought insurance) programmes, after a promising start, failed to attract customers. A crop insurance programme (drought) for small-scale commercial farmers, who are not yet paying tax, has been recommended to government. The purpose in this research is to study the economic viability of such a programme drawing on the US experience. The US programme is well developed but heavily subsidised. During 1998 US growers paid $900 million in premiums while during 1995- 98 the US government spent $1.2 billion per year on subsidies. An area insurance plan (farmers are insured as a group) is shown to be more appropriate for small farmers growing dryland field crops such as maize...
Tipo: Journal Article
Palavras-chave: Farm Management; Risk and Uncertainty.
Ano: 2000
URL: http://purl.umn.edu/54238

AN EMPIRICAL INVESTIGATION OF ACTIVITY CHOICE, LABOR ALLOCATION, AND FOREST USE IN SOUTHERN MALAWI
Provedor de dados: 31
Autores: Fisher,   Monica G.; Shively,   Gerald E.; Buccola,   Steven T.
In this paper we explore forest use and activity choice among low-income households in Malawi.  Using data from three villages in southern Malawi we investigate factors related to forest use by jointly estimating four labor share equations for forest use, maize production, wage-work, and self-employment.  This approach allows us to examine factors influencing competing and synergistic livelihood strategies simultaneously undertaken by households living at the forest margin.  Results from constrained ML estimation indicate greater incentives to degrade forests where the returns to forest use are high.  Factors that reduce pressure on forests include availability of low-cost fuel substitutes, tree planting on the farm, favorable returns to wage-work and...
Tipo: Working or Discussion Paper
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/28616

AN INITIAL INVESTIGATION OF THE POTENTIAL FOR HERMETIC PURDUE IMPROVED CROP STORAGE (PICS) BAGS TO IMPROVE INCOMES FOR MAIZE PRODUCERS IN SUB-SAHARAN AFRICA
Provedor de dados: 31
Autores: Jones,   Michael; Alexander,   Corinne E.; Lowenberg-DeBoer,   James.
Pests like the larger grain borer (P. truncatus) and the maize weevil (S. zeamis) cause significant storage losses for African maize producers.  The value of storage protection to a market-oriented farmer is a function of price seasonality, value loss prevention, and their opportunity costs of capital.  Evidence suggests that hermetic technologies like Purdue Improved Crop Storage (PICS) bags can be effective against these key maize storage pests, but sustainable technology transfer requires that it be profitable for producers. This analysis references dry weight loss figures from key life science articles and builds on previous value loss research to provide a geographic model for potential storage technology adoption.  PICS bag profitability with one and...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural pests; Technology adoption; Maize; Larger grain borer; Hermetic storage; Storage economics; Agribusiness; International Development; Research and Development/Tech Change/Emerging Technologies; Q16; Q13; O33.
Ano: 2011
URL: http://purl.umn.edu/115554

AN INTEGRATED ON-FARM EXPERIMENT AND SURVEY APPROACH TO MAIZE AND GROUNDNUT CONSTRAINT ANALYSIS IN ZIMBABWE
Provedor de dados: 31
Autores: Shumba,   Enos Mutambu.
On-farm trials conducted in Zimbabwe communal areas (peasant sector) have demonstrated the existence of a yield gap between potential farm yields and those achieved by farmers.  This study utilizes the experimental and survey approach to quantify the size of the maize and groundnut yield gaps at the farm level and evaluates the economic returns associated with the yield increasing technologies.  Three major conclusions drawn from the study are:  First, the diagnostic survey and the yield gap package approach substituted for each other in identifying technical constraints for designing on-farm trails.  Second, the magnitude of the yield gap alone could not be used to justify the initiation of a groundnut trial program versus maize, since costs of recovering...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries.
Ano: 1987
URL: http://purl.umn.edu/11218

An ultrastructural study of spermiogenesis in two species of Sitophilus: Coleoptera: Curculionidae
Provedor de dados: 47
Autores: Name,Khesller Patrícia Olázia; Dos Reis,Giuliano Pagy Felipe; Báo,Sônia Nair.
The spermiogenesis of Sitophilus zeamais and Sitophilus oryzae, the maize and the rice weevil, respectively, was studied by light microscopy and scanning and transmission electron microscopy. Sitophilus spp. is the most widespread and destructive primary pest of stored cereals in the world. The spermiogenesis occurs within cysts. There are approximately 256 germ line cells per cyst. Inside each cysts, all the spermatids are in the same stage of maturation. The ultrastructure of the spermatozoa of S. zeamais and S. oryzae is similar to that described for other beetles. The head is formed by a three-layered acrosome with the perforatorium, the acrosomal vesicle, the extra-acrosomal layer and the nucleus. The flagellum has the typical axoneme formed by a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Curculionidae; Sitophilus; Spermiogenesis; Insect sperm; Ultrastructure.
Ano: 2007
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452007000200005

Anais...
Provedor de dados: 14
Autores: CONGRESSO NACIONAL DE MILHO E SORGO, 16., 1986, Belo Horizonte.
O XVI Congresso Nacional de Milho e Sorgo, realizado em Belo Horizonte, no período de 04 a 08 de agosto de 1986, foi uma promoçifo conjunta da EMBRAPA EMATER-MG e EPAMIG, e teve como convidados de honra o Exmo Sr. Ministro da Agricultura, Dr. lris Resende Machado e Exmo Sr. Secretário de Agricultura de Minas Gerais, Dr. Márjo Ramos Vilela. Desse evento participaram cerca de 600 profissionais ligados às áreas técnica, política e econômica das culturas de milho e sorgo. Desse modo, além da presença de pesquisadores, professores, extencionistas etc, também participaram representantes das indústrias alimentícias, de sementes, fertilizantes, defensivos e de máquinas e implementos agrícolas. Durante o congresso, foram apresentados trabalhos técnicos de diversas...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Congresso; Maize; Congress; Sorghum.; Milho; Sorgo.; Corn.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/473901

Análise de crescimento de minimilho submetido a lâminas de irrigação - DOI: 10.4025/actasciagron.v30i2.1730
Provedor de dados: 1
Autores: Meneghetti, Adriana Maria; UNIOESTE; Santos, Reginaldo Ferreira; UNIOESTE; Nóbrega, Lúcia Helena Pereira; UNIOESTE; Martins, Gislaine Iastiaque; UNIOESTE.
Este trabalho avaliou lâminas de irrigação no crescimento da cultura do milho (Zea mays L.) para obtenção de minimilho, determinadas pela evapotranspiração da cultura, baseadas na evaporação da água do Tanque “Classe A” e aplicadas quando a evapotranspiração atingia os valores acumulados: T1 - 15 mm, T2 - 30 mm, T3 - 45 mm e T4 - 60 mm. Foi utilizado delineamento estatístico inteiramente casualizado com quatro tratamentos e cinco repetições. Os resultados foram submetidos à análise estatística, pelo programa Sisvar, determinando-se análise de variância. As médias dos tratamentos foram comparadas a 5% de probabilidade pelo teste de Tukey e pela análise de regressão. Foram selecionadas cinco plantas por parcela para análise das características de...
Palavras-chave: 5.01.03.05-9    Melhoramento Vegetal área foliar; Índice de área foliar; Freqüência de aplicação de água 5.01.03.05-9    Melhoramento Vegetal foliar area; Foliar area index; Water application frequency.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1730

ANÁLISE DE CUSTO DA PRODUÇÃO DO MILHO SAFRINHA: UM ESTUDO NUMA PEQUENA PROPRIEDADE
Provedor de dados: 31
Autores: da Silva,   Rodrigo Calderao; Vaz Lopes,   Antonio Carlos.
O presente trabalho tem como objetivo analisar e demonstrar os custos de produção e de rentabilidade no cultivo do milho safrinha, tendo como meio utilizado a contabilidade, em especial a de custo, sob o enfoque gerencial, para assim auxiliar no controle e ajudar nas tomadas de decisão. Para realização da pesquisa foi utilizado o método de estudo caso, numa pequena propriedade no município de Itaporã, situado na região Sul de Mato Grosso do Sul, foram coletados dados, analisadas as operações realizadas e acompanhamento das atividades. Após estudos dos conceitos e analises dos dados coletados foram feitos os cálculos necessários propiciando assim informações para o resultado da pesquisa e auxilio ao gestor na tomada de decisão acerca da atividade....
Tipo: Conference Paper or Presentation
Palavras-chave: Custo de produção; Milho safrinha; Pequena propriedade; Agricultura familiar; Cost of production; Corn Small crop; Small property; Family farming; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/102553

Análise de interações solo-planta-clima em zonas diferenciadas de área de cultivo de milho
Provedor de dados: 91
Autores: Santos,Antonio O.; Prado,Hélio do.
A expressiva área de cultivo de milho no Brasil e a necessidade constante de aprimoramento do seu manejo, justificam o estudo sobre novas metodologias de tratamento dos recursos financeiros ou técnicos destinados à produção. A cultura do milho tem demonstrado significativa variabilidade espacial da produtividade em estudos sobre a questão e variabilidade temporal também pode ser esperada, ao longo das estações de crescimento. A observação do crescimento e do desenvolvimento de cultivos através de modelos de simulação, pode servir de apoio para o estudo das causas das variabilidades citadas, além de atuar como elemento de integração de dados de solo, planta e clima, principalmente em estudos sobre implementação do manejo localizado, onde se busca aproveitar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ceres-Maize; Agrometeorologia; Água e solo; Zea mays L.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662002000100018

Análise econômica de lâminas de água e de doses de nitrogênio, na cultura do milho, Zea mays L., utilizando o modelo CERES-Maize
Provedor de dados: 1
Autores: Freitas, Paulo Sérgio Lourenço de; UEM; Mantovani, Everardo C.; UFV; Rezende, Roberto; UEM; Gonçalves, Antônio Carlos Andrade; UEM; Bertonha, Altair; UEM.
Para a simulação dos valores necessários nas análises do presente trabalho, utilizou-se o modelo CERES-Maize que está inserido no pacote DSSAT 3.0. Nas simulações, realizadas para o município de Janaúba, Estado de Minas Gerais, foi utilizado o cultivar BR-201-Embrapa. Os dados foram simulados para três datas de semeadura de uma cultura de milho: 15/05, 15/10 e 15/11, combinadas com as opções de com e sem irrigação. Nas condições com irrigação, as lâminas de água utilizadas foram de 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44 e 48 mm, aplicadas com turno de rega de sete dias. As lâminas de água foram combinadas com as seguintes doses de nitrogênio: 0, 30, 60, 90, 120, 150, 180 e 210 kg ha-1. Os valores foram simulados utilizando dados climáticos do período de...
Palavras-chave: 5.00.00.00-4 Ciências Agrárias simulação; Modelo; Irrigação; Milho 5.00.00.00-4 Ciências Agrárias.
Ano: 2001
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2610

Análise econômica de sistemas de produção de sementes de juta e milho no município de Alenquer, Pará.
Provedor de dados: 14
Autores: FRAZÃO, D. A. C.; HOMMA, A. K. O.; FIGUEIRÊDO, F. J. C.; ANDRADE, E. B. de.
bitstream/item/28811/1/CPATU-BP5.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Consorcio; Alenquer; Pará; Brasil; Maize; Seed; Production system; Minimum price; Economy.; Corchorus Capsularis; Economia; Juta; Milho; Preço Mínimo; Semente; Sistema de Produção; Zea Mays.; Amazonia; Intercropping; Jute.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376815

Análise estatística da distribuição de Poisson
Provedor de dados: 43
Autores: Gurgel,J. T. A.
The general properties of POISSON distributions and their relations to the binomial distribuitions are discussed. Two methods of statistical analysis are dealt with in detail: X2-test. In order to carry out the X2-test, the mean frequency and the theoretical frequencies for all classes are calculated. Than the observed and the calculated frequencies are compared, using the well nown formula: f(obs) - f(esp) 2; i(esp). When the expected frequencies are small, one must not forget that the value of X2 may only be calculated, if the expected frequencies are biger than 5. If smaller values should occur, the frequencies of neighboroughing classes must ge pooled. As a second test reintroduced by BRIEGER, consists in comparing the observed and expected error...
Tipo: Info:eu-repo/semantics/article
Ano: 1945
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761945000100010

Análise genética de médias e variâncias da expressão da tolerância ao alumínio em milho
Provedor de dados: 1
Autores: Prioli, Alberto José; UEM; Scapim, Carlos Alberto; UEM; Prati, Rejane Mara; UEM; Prioli, Sonia Maria Alves Pinto; UEM; Bravo, Juliana Pereira; UEM; Hoshino, Andrea Akemi; UEM; Boni, Talge Aiex; UEM; Munhoz, Roxele Ethienne Ferreira; UEM.
Nos solos ácidos, o alumínio limita a produtividade de plantas não adaptadas e seu efeito fitotóxico mais evidente é a redução do crescimento das raízes. O uso combinado de calagem e genótipos tolerantes permitiria o aproveitamento dos solos ácidos. Os resultados de estudos sobre a herança da tolerância em milho (Zea mays L.) são conflitantes. O objetivo deste trabalho foi estimar parâmetros genéticos da tolerância em uma família de uma linhagem tolerante e uma sensível e suas gerações derivadas F1, F2 e retrocruzamentos. Foi analisado o comprimento líquido da radícula de plântulas desenvolvidas em solução nutritiva com 4,5 mg/L de alumínio. O modelo aditivo-dominante foi suficiente e mostrou o efeito gênico aditivo como o principal fator gerador de...
Palavras-chave: 5.00.00.00-4 Ciências Agrárias milho; Tolerância ao alumínio; Herança da tolerância 5.00.00.00-4 Ciências Agrárias.
Ano: 2000
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2815

Análisis bioquímicos y moleculares de la biosíntesis de carotenos en diferentes tejidos de maíz.
Provedor de dados: 32
Autores: Silva Pérez, Viridiana.
El maíz (Zea mays L.) es el cultivo básico más importante en México, y en los últimos años se ha secuenciado su genoma. En este trabajo se utiliza parte de la información genómica, 2,039 marcadores moleculares y se relaciona con el contenido de carotenos en líneas endogámicas recombinantes de maíz de la cruza B73 × Mo17  (IBM-RILs) para detectar loci de caracteres cuantitativos (QTLs). En la primera fase, se estudió el contenido de carotenos en las hojas, ya que éstos disipan la energía lumínica utilizada en la fotosíntesis, influyendo así en la tasa fotosintética y en el rendimiento de los cultivos. Se midió el contenido de luteína, β-caroteno, α-caroteno, β-criptoxantina y zeaxantina, y se encontró que β-caroteno representó 80% del total de carotenos. Se...
Palavras-chave: Zea mays; Follaje; Grano; Fotosíntesis; Provitamina A.; Foliage; Kernel; Photosynthesis; Pro-vitamin A; Maestría; Genética.
Ano: 2011
URL: http://hdl.handle.net/10521/450

Análisis bioquímicos y moleculares de la biosíntesis de carotenos en diferentes tejidos de maíz.
Provedor de dados: 32
Autores: Silva Pérez, Viridiana.
El maíz (Zea mays L.) es el cultivo básico más importante en México, y en los últimos años se ha secuenciado su genoma. En este trabajo se utiliza parte de la información genómica, 2,039 marcadores moleculares y se relaciona con el contenido de carotenos en líneas endogámicas recombinantes de maíz de la cruza B73 × Mo17  (IBM-RILs) para detectar loci de caracteres cuantitativos (QTLs). En la primera fase, se estudió el contenido de carotenos en las hojas, ya que éstos disipan la energía lumínica utilizada en la fotosíntesis, influyendo así en la tasa fotosintética y en el rendimiento de los cultivos. Se midió el contenido de luteína, β-caroteno, α-caroteno, β-criptoxantina y zeaxantina, y se encontró que β-caroteno representó 80% del total de carotenos. Se...
Palavras-chave: Zea mays; Follaje; Grano; Fotosíntesis; Provitamina A.; Foliage; Kernel; Photosynthesis; Pro-vitamin A; Maestría; Genética.
Ano: 2011
URL: http://hdl.handle.net/10521/450

ANÁLISIS DE BIENESTAR DE LOS “SHOCKS DE PRECIOS DE LOS COMMODITIES” EN LOS MERCADOS DE MAÍZ Y TRIGO EN MÉXICO
Provedor de dados: 31
Autores: Barkley,   Andrew P.; Nalley,   Lawton Lanier; Garay,   Pedro V.
The impacts of biofuel-based commodity price shocks on wheat and maize producers and consumers in Mexico are quantified with a two-region welfare economics model of the world wheat and maize markets. This model captures the international flow of wheat and maize between Mexico and the rest of the world, enabling measurement of price and quantity changes in both Mexican and global wheat and maize markets due to supply shocks in the grain markets. The drastic shifts in supply that accompanied grain markets in 2007/2008 are used to quantify the effects on Mexican consumer and producer well-being.
Tipo: Journal Article
Palavras-chave: Biofuels; Wheat; Corn; Mexican grain markets; Two-region welfare economic model.; Agribusiness.
Ano: 2011
URL: http://purl.umn.edu/113948

Análisis de estabilidad y adaptabilidad de híbridos de maíz de alta calidad proteica en diferentes zonas Agroecológicas de Colombia
Provedor de dados: 109
Autores: Vargas Escobar,Ever Andrés; Vargas Sánchez,José Ever; Baena García,Diosdado.
La energía es el mayor aporte del maíz (Zea mays) para la producción de alimentos de consumo humano y animal. Desde 1896 se ha tratado de incrementar el nivel de proteína en este cereal, no obstante fue en la década de 1960 cuando se obtuvo un gran avance con el hallazgo del gen opaco O2. Este gen, en su estado recesivo, hace que la calidad proteica del maíz aumente, debido al incremento en el contenido de globulinas y la reducción de zeínas. Los maíces conocidos como QPM (Quality Protein Maize) duplican la cantidad de lisina y triptófano cuando se comparan con maíces de endospermo normal. Una meta posible es obtener QPM de alto rendimiento de grano, con buena sanidad y adaptados a diferentes condiciones ambientales. En el este trabajo se probaron nueve...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maíz de alta calidad proteínica; Zea mays; Híbridos; Adaptabilidad y estabilidad; Modelos matemáticos.
Ano: 2016
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122016000100011

Análisis de la situación actual de la producción de maíz y de la pluriactividad de los agricultores en el Valle de Puebla.
Provedor de dados: 32
Autores: Osorio García, Nemesio.
En México el maíz es el cultivo más importante debido a que es la base de la alimentación de la población y porque actualmente se le considera como materia prima para la industria. Lo anterior hace necesaria una mayor producción de este grano para garantizar la seguridad alimentaria de los mexicanos. Por lo tanto es necesario analizar la situación actual de la producción de maíz a diferentes niveles, incluyendo el regional, para hacer propuestas que nos permitan incrementar la producción de este grano básico. En el Valle de Puebla los rendimientos de maíz son bajos comparados con los resultados experimentales en este cultivo. Los objetivos de esta investigación fueron determinar cuál es la situación actual de la utilización, oferta y demanda de la...
Palavras-chave: Adopción; Oferta y demanda de tecnología; Productividad; Valle de Puebla; Technology adoption; Offer and demand; Pluriactivity; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/130

Análisis de la situación actual de la producción de maíz y de la pluriactividad de los agricultores en el Valle de Puebla.
Provedor de dados: 32
Autores: Osorio García, Nemesio.
En México el maíz es el cultivo más importante debido a que es la base de la alimentación de la población y porque actualmente se le considera como materia prima para la industria. Lo anterior hace necesaria una mayor producción de este grano para garantizar la seguridad alimentaria de los mexicanos. Por lo tanto es necesario analizar la situación actual de la producción de maíz a diferentes niveles, incluyendo el regional, para hacer propuestas que nos permitan incrementar la producción de este grano básico. En el Valle de Puebla los rendimientos de maíz son bajos comparados con los resultados experimentales en este cultivo. Los objetivos de esta investigación fueron determinar cuál es la situación actual de la utilización, oferta y demanda de la...
Palavras-chave: Adopción; Oferta y demanda de tecnología; Productividad; Valle de Puebla; Technology adoption; Offer and demand; Pluriactivity; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/130

Análisis del medio físico en la región con clima "A" de Koeppen en el oriente de México y su aplicación en la investigación agropecuria.
Provedor de dados: 32
Autores: Ramos Sánchez, Angel; Hernández Xolocotzi, Efraím.
Este estudio tiene como objetivo mostrar la utilización del análisis ecológico de las diversas zonas del país para la planeación de la investigación y la experimentación agropecuaria. Se analizaron los factores físicos - geológico, geográfico, climático y edáfico de la región oriental y sureste de México con clima A ó tropical húmedo según la clasificación de Koeppen. Este clima se caracteriza por registrar una media de temperatura del mes más frío superior a los 18ºC y una precipitación con la relación P/ (T + 14) &gt;2, siendo P la precipitación media anual en centímetros, T la temperatura media anual en grados centígrados, y 14 el factor de corrección. Estos análisis sirvieron para conjugar el conocimiento actual de la zona, para señalar las...
Tipo: Artículo
Palavras-chave: Botánica; Factores climáticos; Factores edáficos; Maíz Tonalmil; Factores ambientales.
Ano: 1967
URL: http://hdl.handle.net/10521/1796

Analisis del sistema argentino de investigacion agropecuaria
Provedor de dados: 31
Autores: Parellada,   Gabriel H.; Ekboir,   Javier M.
El sector agropecuario ha desempeñado siempre un papel fundamental en la economía argentina. En la segunda mitad del siglo XX, los productos de origen pampeano tuvieron un fuerte crecimiento gracias a la adopción masiva de nuevas tecnologías de comercialización y producción. Estas tecnologías fueron desarrolladas por redes de agentes que incluyeron en forma prominente productores innovadores, empresas privadas e investigadores de instituciones públicas. Sin embargo, las instituciones mismas tuvieron una participación limitada, y su mayor impacto se derivó del desarrollo de semillas mejoradas de los principales cultivos pampeanos. En la primera mitad del siglo XX, Argentina construyó un sistema público de investigación fuerte, localizado fundamentalmente en...
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/7694

Analisis del sistema Mexicano de investigacion agropecuaria
Provedor de dados: 31
Autores: Ekboir,   Javier M.; Espinosa Garcia,   Jose Antonio; Espinoza Arellano,   Jose de Jesus; Moctezuma Lopez,   Georgel; Naranjo,   Alfredo Tapia.
En la década del 90, el sector agropecuario mexicano generó alrededor del 5% del PBI y el 2.5% de las exportaciones. A pesar de su reducida contribución al PBI, el sector agropecuario tiene una gran importancia económica y social como generador de empleos (un 25% del empleo total), por su influencia sobre el costo de vida, la prevalencia de la pobreza rural (más del 75% de la población pobre y más del 50% de los que viven en pobreza extrema habitan en zonas rurales) y porque las exportaciones agropecuarias constituyen una fuente de ingreso importante para varias regiones, especialmente las zonas irrigadas del norte y centro del país. Desde la década del 70, algunos productores agropecuarios mexicanos, especialmente los que se integraron a cadenas...
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/7684

Analisis del sistema panameno de investigacion agropecuaria
Provedor de dados: 31
Autores: Ekboir,   Javier M.; de Herrera,   Adys Pereira; Becerra,   Franklin.
Panamá tiene una economía dual con unas pocas actividades altamente competitivas y otras que se desarrollaron gracias a políticas de sustitución de importaciones. Estas políticas influyeron sobre el sistema público de  investigación. Durante 15 años, los objetivos más importantes de este sistema fueron el apoyo a productores que vendían en el mercado interno y el fomento de las actividades tradicionales de exportación. La  competitividad y la comercialización no eran relevantes. Así, las instituciones de investigación desarrollaron programas para los productos tradicionales de los pequeños y medianos productores (granos básicos y ganadería).  La estabilidad de las políticas proteccionistas y el deficiente control de la calidad de la investigación...
Tipo: Working or Discussion Paper
Palavras-chave: Panama; Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/7679

Analisis del sistema Paraguayo de investigacion agropecuaria
Provedor de dados: 31
Autores: Ekboir,   Javier M.; Parellada,   Gabriel H.; Molina,   Andres; Duarte,   Cesar.
En la década del 90, el Gobierno paraguayo implementó, con poco éxito, varios planes de reforma del Estado. Actualmente conviven en Paraguay un Estado muy centralizado, con poca capacidad de implementar políticas modernas, y una economía muy descentralizada (a veces completamente fuera del control del gobierno y de la policía), que evoluciona gracias a las acciones e interacciones de agentes individuales y a las oportunidades creadas por la integración a los mercados fronterizos, tanto en los rubros comerciales como agropecuarios. Pero por la espontaneidad propia de este proceso de desarrollo, importantes sectores de la sociedad han quedado marginados. A pesar de la importancia del sector agropecuario en la economía paraguaya, han sido pocos los esfuerzos...
Tipo: Working or Discussion Paper
Ano: 2003
URL: http://purl.umn.edu/48282

Análisis dialélico para rendimiento en líneas de maíz con alta calidad de proteína.
Provedor de dados: 32
Autores: Andrés Meza, Pablo.
Durante el ciclo agrícola primavera-verano 2008, se establecieron en el Campo Experimental Cotaxtla, Veracruz, México, dos ensayos, 1) evaluación y selección de líneas con base en su comportamiento per se  y 2) evaluación y selección de cruzas dialélicas, con base en su aptitud combinatoria general (ACG), aptitud combinatoria específica (ACE) y heterosis. El diseño fue un alfa látice 4x8 y 16x8 con dos repeticiones. Los resultados muestran un grupo de líneas con alta calidad de proteína, con buen comportamiento per se, como: (VS-536xV-537C)VS-536RC2-1-1-959 (VS-536), (VS-536xV-537C)VS-536RC2-1-1-960 (VS-536), (VS-536xV-537C)VS-536RC2-1-1-952 (VS-536-) y (VS-536xV-537C)VS-536RC2-1-1-953 (VS-536), similares a las líneas de referencia LT-155-289 y LT-157-291...
Palavras-chave: Zea mays L.; Selección per se; Cruzas; Aptitud combinatoria; Proteína; Selection per se; Cross; Combining ability; Protein; Maestría; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/207

Análisis dialélico para rendimiento en líneas de maíz con alta calidad de proteína.
Provedor de dados: 32
Autores: Andrés Meza, Pablo.
Durante el ciclo agrícola primavera-verano 2008, se establecieron en el Campo Experimental Cotaxtla, Veracruz, México, dos ensayos, 1) evaluación y selección de líneas con base en su comportamiento per se  y 2) evaluación y selección de cruzas dialélicas, con base en su aptitud combinatoria general (ACG), aptitud combinatoria específica (ACE) y heterosis. El diseño fue un alfa látice 4x8 y 16x8 con dos repeticiones. Los resultados muestran un grupo de líneas con alta calidad de proteína, con buen comportamiento per se, como: (VS-536xV-537C)VS-536RC2-1-1-959 (VS-536), (VS-536xV-537C)VS-536RC2-1-1-960 (VS-536), (VS-536xV-537C)VS-536RC2-1-1-952 (VS-536-) y (VS-536xV-537C)VS-536RC2-1-1-953 (VS-536), similares a las líneas de referencia LT-155-289 y LT-157-291...
Palavras-chave: Zea mays L.; Selección per se; Cruzas; Aptitud combinatoria; Proteína; Selection per se; Cross; Combining ability; Protein; Maestría; Agroecosistemas Tropicales.
Ano: 2010
URL: http://hdl.handle.net/10521/207

Análisis socioeconómico de la producción de semilla certificada de maíz, en el estado de Tlaxcala.
Provedor de dados: 32
Autores: Córdova Islas, Elisandra.
La presente investigación tuvo el propósito de analizar la situación socioeconómica que viven los productores de semilla certificada de maíz del estado de Tlaxcala, los aspectos técnicos productivos, el proceso de comercialización y la rentabilidad obtenida del cultivo; Este estudio se realizó en cinco organizaciones productoras del Estado, las cuales cuentan con áreas de alto y mediano potencial productivo, se ubican entre 2,200 a 2,500 msnm, y tienen rendimientos económicos aceptables. El método de investigación que se aplicó fue de carácter descriptivo-analítico, mientras que la metodología utilizada consistió en la identificación de las comunidades productoras de semillas certificadas, en donde se aplicaron 38 encuestas a productores y representantes...
Palavras-chave: Producción de semilla certificada; Rentabilidad; Aspectos productivos; Aspectos organizativos; Aspectos normativos; Comercialización; Certified seed production; Profitability; Production aspects; Organizational aspects; Regulatory aspects; Marketing; Desarrollo rural; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1960

Analyse des Energieeinsatzes und der Energieeffizienz bei der Futtererzeugung in der Milchviehhaltung
Provedor de dados: 21
Autores: Frank, Helmut; Schmid, Harald; Hülsbergen, Kurt-Jürgen.
Fodder production requires the highest energy input in dairy farming. Taking the  organic and conventional dairy farms from the project “climate effects of land use systems – evaluations on pilot farms” as an example we analyse the energy input for producing different fodder types and the influence of feeding strategies in Southern Germany. The results show that grazing is the most energy efficient form of feeding, followed by fresh grass and silage. Hay requires the highest energy input per unit forage energy. Maize silage has a lower energy input due to high yields. The higher the part of roughage in the ration the lower is the energy input for production of the ration.
Tipo: Conference paper, poster, etc.
Palavras-chave: Feeding and growth; Air and water emissions.
Ano: 2011
URL: http://orgprints.org/18229/3/Frank_18229.pdf

Analysis of Costs and Returns to Maize-Cowpea Intercrop Production in Oyo state, Nigeria
Provedor de dados: 31
Autores: Segun-Olasanmi,   A.O.; Bamire,   A.S.
Net gains on agricultural investments promote sustainable farm production. The costs and returns analysis to maize-cowpea intercrop was analysed in selected communities of Oyo state, Nigeria, to determine the profitability of the enterprise. A multi-stage stratified sampling technique was used to select a sample size of one hundred and sixty maize-cowpea intercrop farmers in eighteen farming communities in the study area. Data were obtained from the farmers on their socio-economic characteristics, resource ownership, input and output used as well as costs incurred and revenue obtained for the 2006 production season using a structured questionnaire. Data were collected on a gender-disaggregated basis and analysed with the budgetary technique using the gross...
Tipo: Conference Paper or Presentation
Palavras-chave: Costs; Maize-cowpea intercrop; Returns; Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/96800

Analysis of gene expression profiles in response to Sporisorium reilianum f. sp. zeae in maize (Zea mays L.)
Provedor de dados: 69
Autores: Yu,Tao; Wang,Zhenhua; Jin,Xiaochun; Liu,Xianjun; Kan,Shuaishuai.
Background Head smut of maize, which is caused by Sporisorium reilianum f. sp. zeae (Kühn), is a serious disease in maize. In order to reveal the molecular mechanism of the resistance to head smut in maize, a microarray containing ~ 14,850 probes was used to monitor the gene expression profiles between a disease resistant near isogenic line (NIL) and a highly susceptible inbred line after S. reilianum was injected with an artificial inoculation method. Results Levels of expression for 3,532 genes accounting for 23.8% of the total probes changed after inoculation. Gene Ontology analysis revealed that the differentially expressed genes participated in physiological and biochemical pathways. The Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis...
Tipo: Journal article
Palavras-chave: Differentially expressed genes; Head smut resistance gene; Maize; Microarray.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000500007

Analysis of genetic diversity in Argentinian heterotic maize populations using molecular markers
Provedor de dados: 118
Autores: Morales,Marcelo; Decker,Viviana; Ornella,Leonardo.
Over the past three decades, traditional Argentinean Orange Flint maize cultivars have been replaced by the higher yielding U.S. Yellow Dent germplasms. However, fint cultivars are potentially resistant to biotic and/or abiotic stress. Thus, knowledge of genetic diversity and relationships among fint inbred lines would help reduce genetic vulnerability and broaden the genetic base of crops in national improvement programs. In this study, we report the analysis of 25 inbred Orange Flint germplasms and one dent using 21 microsatellite markers or Simple Sequence Repeats (SSR). The aim was to assess genetic diversity among these accessions and evaluate the usefulness of SSR markers for defning heterotic groups in temperate germplasm. Genetic diversity values...
Tipo: Journal article
Palavras-chave: Cluster analysis; Microsatellite; Zea mays.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000100015

Analysis of Participatory Research Projects in the International Maize and Wheat Improvement Center
Provedor de dados: 31
Autores: Lilja,   Nina K.; Bellon,   Mauricio R.
Through a survey of scientists from the International Maize and Wheat Improvement Center (CIMMYT) in 2004, this study assessed the extent to which participatory methods had been used by the center, how they were perceived by the scientists, and how participatory research could be applied more effectively by CIMMYT and partners. Results for 19 CIMMYT projects suggest among other things that participatory approaches at the center were largely “functional”—that is, aimed at improving the efficiency and relevance of research—and had in fact added value to the research efforts. The authors suggest that CIMMYT should (1) create a more conducive environment for scientists to share experiences on such approaches and (2) better document their impacts on farmers’...
Tipo: Report
Palavras-chave: Economic analysis; Research projects; Research methods; Quantitative analysis; Surveys; Statistics; Evaluation; Scientists; Research institutions; Mexico.; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; E10; A50.
Ano: 2006
URL: http://purl.umn.edu/56099

ANALYSIS OF PROJECTS WITH PRICE EFFECTS, AND APPLICATION TO INNOVATION AND TECHNICAL CHANGE
Provedor de dados: 31
Autores: Oehmke,   James F.; Crawford,   Eric W.
Replaced with revised version of paper 04/21/06.
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/11766

Analysis of the Impact of CIMMYT Research on the Australian Wheat Industry
Provedor de dados: 31
Autores: Brennan,   John P.; Quade,   Kathryn J.
Wheat genetic materials developed from research at the International Maize and Wheat Improvement Center (CIMMYT) in Mexico for developing countries have provided spillover benefits to Australia. Varieties developed from those genetic materials have resulted in yield increases in Australia. CIMMYT’s success in developing countries has also reduced the world price for wheat. While the lower prices affect returns in Australia, the increased yields in Australia from the CIMMYT spillovers have provided benefits to Australia averaging A$30 million per year since 1973. If these benefits are to continue in the future, Australia must continue its close relationship with CIMMYT.
Tipo: Report
Palavras-chave: Wheat; Research; Spillover; CIMMYT; Australia; Crop Production/Industries; Farm Management; Research and Development/Tech Change/Emerging Technologies; Q160.
Ano: 2004
URL: http://purl.umn.edu/42505

ANALYSIS OF THE INITIAL GROWTH OF CASSAVA IN INTERCROPPING SYSTEM
Provedor de dados: 22
Autores: Ferreira, Evander Alves; Silva, Daniel Valadão; Braga, Renan Rodrigues; Oliveira, Maxwel Coura de; Pereira, Gustavo Antonio Mendes; Santos, José Barbosa dos; Sediyama, Tocio.
One of the main reasons why farmers in different regions prefer polycultures is that very often you can get higher yields in an area sown in polyculture than in monoculture with an equivalent area. Thus in systems polycultures the plants are in a state of permanent competition causing a reduction in plant growth consorts. The competition affects the production quantitatively and qualitatively, because it changes the efficiency of utilization of environmental resources such as water, light and nutrients, settling between culture and plants of other species existing on site. This competition also occurs between individuals of the same species or between biotypes prevalent in the area. Thus, the aim of this study was to evaluate the growth of two cultivars of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Produção vegetal; Agronomia.
Ano: 2014
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/7498

Analysis of the physical quality of genetically modified and conventional maize grains in the drying and wetting processes
Provedor de dados: 124
Autores: Coradi,Paulo Carteri; Souza,Alisson Henrique Spricigo de; Camilo,Lucas Jandrey; Lemes,Ângelo Francisco Calegare; Milane,Lélia Vanessa.
ABSTRACT The aim of this work was to evaluate the physical quality of the genetically modified corn grains (Herculex 30S31) as a function of drying and wetting processes in relation to conventional corn (AG 1051). The experimental design was a completely randomized design, with a factorial scheme (7x3x2), seven drying or wetting times (0, 20, 40, 60, 80, 100, 120 minutes), three drying air temperatures (80, 100 and 120 °C) and two types of maize (conventional AG 1051 and Herculex 30S31 transgenic). The grains of transgenic and conventional corn were harvested with a water content of 13.5% (w.b.) and dried in convection oven with forced ventilation, then the same grains were submitted to a wetting process for the same time. The width, thickness, length,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conventional corn AG 1051; Herculex 30S31 transgenic maize; Quantitative and qualitative losses; Resistance of the grains in the post-harvest operations.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000300370

Analysis of the Structure and Performance of the Beans Marketing System in Nairobi
Provedor de dados: 31
Autores: Odhiambo,   Mark O.; Oluoch-Kosura,   Willis; Kibiego,   Michael B.
Beans are widely grown as a major food crop in Eastern and Southern Africa. It is the most important staple food crop after maize in Kenya (ECABREN, 2000). The beans industry in Kenya is faced with problems of shortages, seasonal supply and price fluctuations and inadequate information on production, marketing and consumption. These problems are more acute in urban areas. This paper analyzes the structure and performance of the beans marketing system in Nairobi metropolitan area, the single most important beans market in Kenya. Data from a sample of 102 traders augmented by secondary data were used to analyze the marketing system by applying descriptive statistics, concentration ratios and co-integration models. The results showed that the beans marketing...
Tipo: Conference Paper or Presentation
Palavras-chave: Beans; Competitive Structure; Co-integration and Efficiency.; Crop Production/Industries; Marketing.
Ano: 2006
URL: http://purl.umn.edu/25440

ANALYSIS OF THE ZATPID I RURAL HOUSEHOLD SURVEY:  WITH EMPHASIS ON DATA QUALITY AND A COMPARISON OF CHARACTERISTICS OF SMALLHOLDER MAIZE PRODUCERS OF ZAMBIA
Provedor de dados: 31
Autores: Sumbye,   A. Kapena.
Between December 1984 and July 1986, the Planning Division of the Ministry of Agriculture and Water Development, in conjunction with the Rural Development Studies Bureau of the University of Zambia and Iowa State University conducted a rural household survey.  This is referred to as the ZATPID I Rural Household Survey, because it was conducted during phase I of ZATPID, a five year USAID/Zambia project.  ZATPID stands for Zambia Agricultural Training, Planning and Institutional Developmental Project.  The aim of the survey was to provide data for use in analysis to inform policy making in Zambia.  It was also supposed to provide a data bank for use by Zambian graduate students to meet the research requirements of their degree programs.  The objectives of...
Tipo: Thesis or Dissertation
Palavras-chave: Consumer/Household Economics; Crop Production/Industries.
Ano: 1989
URL: http://purl.umn.edu/10968

Analyzing Drivers of World Food Prices: Weather, Growth, and Biofuels
Provedor de dados: 31
Autores: Saunders,   Caroline M.; Kaye-Blake,   William; Cagatay,   Selim.
The recent rise of food cost in world markets has accelerated the research examining the underlying factors for this rise. The present research investigated the separate and combined impacts of three factors thought to contribute to the price rise: adverse weather events, strong and sustained growth in high populated countries, and increased biofuels production. The research further analysed the effects of these price rises on consumption expenditures in Brazil, China and India. Analyses were carried out using a partial equilibrium trade model with a focus on the 2004 to 2007 period. The modelling suggests that the most important factor behind the price rise depends on the commodity, with maize/corn, oilseeds, and sugar most affected by biofuels, while...
Tipo: Conference Paper or Presentation
Palavras-chave: Food prices; Partial equilibrium model; Biofuel; Agricultural and Food Policy; International Relations/Trade; F11; Q17.
Ano: 2009
URL: http://purl.umn.edu/51460

Anatomía y tolerancia a la desecación de semillas de cacao (Theobroma cacao L.)
Provedor de dados: 32
Autores: Rangel Fajardo, María Alma.
La adquisición de tolerancia a la desecación en semillas ortodoxas es una estrategia adaptativa  que no presentan las semillas del tipo recalcitrantes y por consiguiente son sensibles a la  desecación. El grado de tolerancia o sensibilidad a la desecación se ve afectada por varios  aspectos de origen genético, fisiológico, bioquímico y anatómico; por consiguiente existen  diferencias entre genotipos y entre individuos dentro del genotipo de la misma especie. En este  estudio se documentaron características de anatomía de las semillas de cacao, se midió el grado  de tolerancia a la desecación y la acumulación de azúcares en relación con tolerancia a la  desecación en poblaciones de tres orígenes genéticos de cacao (Theobroma cacao L.). Se  emplearon los...
Tipo: Tesis
Palavras-chave: Theobroma cacao L.; Anatomía; Desecación; Estaquiosa; Germinación; Rafinosa; Semilla; Sensibilidad; Doctorado; Producción de semillas; Anatomy; Drying; Germination; Raffinose; Seed sensitivity; Stachyose.
Ano: 2009
URL: http://hdl.handle.net/10521/1246

Animal nutrition studies
Provedor de dados: 106
Autores: Prateap Rachapaetayakom.
20 tables
Palavras-chave: Chickens; Chicks; Corn; Maize; Opaque-2; Protein diet; Rations; Nutritive value; Varieties; Mycotoxin; Feed contamination; Growth; Animal performance; ข้าวโพด; ยีนโอเพค 2; โปรตีน; สูตรอาหาร; ลูกไก่; ไก่กระทง.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3767

ANNUAL GRASSES CONTROL WITH TOPRAMEZONE IN MIXTURE WITH ALS-INHIBITING HERBICIDES
Provedor de dados: 87
Autores: DAMALAS,C. A.; GITSOPOULOS,T. K.; KOUTROUBAS,S.D.; GEORGOULAS,I.
ABSTRACTPanicoid grasses are major weeds of maize and sugarcane as well as of several other important grains, including sorghum, pearl millet, and foxtail millet. Pot trials were conducted to study the activity and potential interactions of topramezone in mixture with recommended rates of rimsulfuron or nicosulfuron on three annual panicoid grasses (i.e. Echinochloa oryzoides,E.phyllopogon, and Panicum miliaceum). Target weeds were treated at the four- to five-leaf growth stage. On the basis of fresh weight reduction, topramezone alone provided 78% control of E.oryzoides, 68% control of E.phyllopogon, and 99% control of P.miliaceum. Topramezone plus rimsulfuron or nicosulfuron provided decreased control of both Echinochloa spp. compared with topramezone...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Efficacy; Nicosulfuron; Mixtures; Rimsulfuron.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300509

Annual maize and perennial grass-clover strip cropping to produce biomass for bioenergy – within an organic farming approach
Provedor de dados: 21
Autores: Hauggaard-Nielsen, Henrik; Johansen, Anders; Carter, Mette S.; Ambus, Per; Jensen, Erik Steen.
A field experiment was carried out including alternating perennial ryegrass (Lolium perenne L.) – clover (Trifolium repens + Trifolium pretense L.) pasture mix with annual maize (Zea mays L.). Maize was established after soil incorporation of a 1st-year grass-clover in a 6-m wide strip, whereas grass-clover was established without incorporating the 1st-year grass-clover in an equivalent 6-m wide strip. This resulted in an early interspecific competitive advantage for the perennial strip and when growing maize in close proximity to grass-clover total dry matter production was reduced with about 50% compared to &gt;150 cm distance. However, it was partly compensated by greater yields by especially the 50-100 cm harvest. In contrast there was no significant...
Tipo: Journal paper
Palavras-chave: "Organics" in general Crop combinations and interactions Composting and manuring Recycling; Balancing and resource management Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/20914/7/20914.pdf

Annual research report on corn disease for 1979
Provedor de dados: 106
Autores: Somkiat Titatarn; Diloke Unchalisangkas; Veera Jamkrajang; Niyom Chew-Chin.
1 table
Palavras-chave: Corn; Maize; Plant diseases; ข้าวโพด; โรคราน้ำค้าง; โรคไวรัสเอมดีเอมวี.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3963

Annual research report on corn disease in 1980
Provedor de dados: 106
Autores: Somkiat Titatarn; Diloke Unchalisangkas; Weera Chamkrachang; Niyom Chew-Chin.
2 tables
Palavras-chave: Corn; Maize; Downy mildew; Plant diseases; Chemical control; Varieties; Disease resistance; ข้าวโพด; โรคพืช; การควบคุมด้วยสารเคมี; พันธุ์ต้านทาน.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4019

Annual research report on corn disease in 1981
Provedor de dados: 106
Autores: Somkiat Titatarn; Diloke Unchalisangkas; Weera Chamkrachang; Niyom Chew-Chin.
Palavras-chave: Corn; Maize; Downy mildew; Infection; Variety trials; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4053

Annual research report on diseases of corn and job tears in 1983
Provedor de dados: 106
Autores: Somkiat Titatarn; Sawai Nuangpai; Diloke Unchalisangkas; Unchalee Chiengkul.
1 table
Palavras-chave: Corn; Maize; Job's tear; Pathology; Downy mildew; Phyllachora coicis; Varieties; Disease resistance; ข้าวโพด; ลูกเดือย; โรคพืช; โรคราน้ำค้าง.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4147

Antifungal activity of Crotalaria longirostrata Hook. &amp;amp; Arn. extracts against phytopathogen fungi from maize
Provedor de dados: 73
Autores: Cruz-Rodríguez,Rosa Isela; Meza-Gordillo,Rocío; Rodríguez-Mendiola,Martha Alicia; Arias-Castro,Carlos; Mancilla-Margalli,Norma Alejandra; Ávila-Miranda,Martín Eduardo; Culebro-Ricaldi,José Miguel; Gutiérrez-Miceli,Federico Antonio; Ruiz-Valdiviezo,Víctor Manuel; Ayora-Talavera,Teresa Del Rosario.
ABSTRACT In the present study, the hexane, acetone and methanol extracts of stem, branches and roots from Crotalaria longirostrata were evaluated for their antifungal activity against Fusarium sp., Fusarium verticillioides and Aspergillus flavus. The variables analyzed were inhibition halos, mycelial growth inhibition, sporulation and minimum inhibitory concentration. Phytochemical analysis revealed the presence of saponins, coumarins, anthrones, anthraquinones, flavonoids and alkaloids on different organic extracts. The hexane extract showed zones of inhibition between 6.3 and 10.5 mm. The mycelia growth and sporulation of A. flavus were reduced to 90% with methanol extract. The minimum inhibitory concentration values obtained with hexane extracts were...
Tipo: Journal article
Palavras-chave: Fungicidal properties; Extracts; Fusarium verticillioides; Fusarium sp.; Aspergillus flavus.
Ano: 2017
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432017000100167

Antifungal potential of crude extracts of Trichoderma spp.
Provedor de dados: 49
Autores: Marques,Eder; Martins,Irene; Mello,Sueli Correa Marques de.
Abstract Antibiosis is the mechanism by which certain microorganisms respond to the presence of others, secreting compounds or metabolites capable of inhibiting or impeding their development. The crude extract of Trichoderma contains a mixture of secondary compounds, which may show antibiotic effect, and has been used for the prospect of this fungus for biological control and other industrial purposes. Faced with the increasing demand of agriculture for ecologically compatible alternatives for the management of diseases, this work aimed to investigate the spectrum of action of Non-Volatile Metabolites (NVMs) of Trichoderma isolates against different plant pathogenic fungi. The antagonistic potential of NVMs was evaluated through the incorporation method of...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Secondary metabolites; Antagonism; Inhibition of mycelial growth; Plant pathogenic fungi.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000100503

Antracnose do milho (Colletotrichum graminicola).
Provedor de dados: 14
Autores: FERREIRA, A. S.; CASELA, C. R.
bitstream/item/30147/1/circ-13.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Sintomas; Ciclo; Maize; Cicle; Management.; Antracnose; Colletotrichum Graminicola; Manejo; Milho; Zea Mays.; Anthracnose.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/485240

Anuário Estatístico Do Sima 2000-2001
Provedor de dados: 31
Autores: Abdula,   Danilo Carimo.
Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambique
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Food policy; Crop Production/Industries; Q18.
Ano: 2002
URL: http://purl.umn.edu/56056

Aplicação do modelo CERES-maize na análise de estratégias de irrigação para milho "safrinha" em Londrina-PR
Provedor de dados: 70
Autores: Cardoso,Célio O.; Faria,Rogério T. de; Folegatti,Marcos V.
Usando-se a capacidade do modelo CERES-maize de simular o crescimento do milho sob várias condições de ambiente e manejo, foram analisadas estratégias de irrigação para o milho "safrinha", em diferentes épocas de semeadura, em Londrina - PR. Os tratamentos simulados constituíram-se no cultivo da cultivar de milho XL-520, em 12 épocas de semeaduras, no período de janeiro a abril, adotando-se cinco critérios para aplicação de irrigação, além de um nível sem irrigação e outro de produção potencial. Para as simulações, foram utilizados os dados meteorológicos da série histórica disponível para o local, características do solo predominante da região e manejo, seguindo as recomendações técnicas regionais para o cultivo. Os resultados revelaram que a irrigação...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Simulação; Modelo matemático; Viabilidade.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162004000100005

Aplicación de métodos multivariados para la tipificación y caracterización de almacenes de maíz en México.
Provedor de dados: 32
Autores: Ortíz Rosales, Miguel Angel.
El principal cultivo en producción, importaciones y consumo en México es el maíz, su correcto almacenamiento permite hacerlo disponible en todo momento, incide directamente en la seguridad alimentaria del país, permite hacer más competitiva la oferta y es un detonante de ingresos y empleos. Por otro lado, la oferta de maíz en México se encuentra dispersa por todo el país y entre propietarios con distintos niveles de desarrollo; en consecuencia, las características de los almacenes pueden obedecer a varios factores. En este contexto, las políticas dirigidas a eficientar el sistema de almacenamiento de maíz en México deben considerar dicha heterogeneidad. En este estudio se propone una tipología de almacenes de maíz que permite agrupar características en...
Palavras-chave: Seguridad alimentaria; Análisis de componentes principales (ACP); Análisis clúster; Economía; Doctorado; Food security; Principal component Analysis (PCA); Cluster analysis.
Ano: 2012
URL: http://hdl.handle.net/10521/1780

Aplicación del Elastic Net LASSO y modelos relacionados en selección genómica basados en marcadores moleculares.
Provedor de dados: 32
Autores: López Cruz, Marco Antonio.
El Elastic Net Bayesiano (BEN) es un método de regresión que utiliza una mezcla de las penalizaciones L1 y L2 (Kyung et al., 2010, Li y Lin, 2010). Se ha demostrado que este modelo puede ser usado exitosamente cuando el tamaño de muestra es mucho menor que el número de predictores (n &lt;&lt; p). En este trabajo se muestra cómo utilizar este modelo para incluir de forma conjunta Marcadores Moleculares (MM) y Pedigree, ampliamente utilizados en gen etica cuantitativa en la llamada selección asistida por MM. Por medio de validación cruzada, el poder predictivo del BEN se compara con el de otros modelos: LASSO Bayesiano y Regresión Ridge Bayesiana, usando datos reales de rendimiento de cultivares de trigo y cebada, y tiempos de floración de maíz. Los...
Palavras-chave: Validación cruzada; Regresión penalizada; Predicción de valores genéticos; Cross-validation; Penalized regression; Prediction of genetic values; Estadística; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/712

Apparent digestibility coefficient of chickpea, maize, high-quality protein maize, and beans diets in juvenile and adult Nile tilapia ( Oreochromis niloticus )
Provedor de dados: 96
Autores: Montoya-Mejía,Magnolia; Hernández-Llamas,Alfredo; García-Ulloa,Manuel; Nolasco-Soria,Héctor; Gutierrez-Dorado,Roberto; Rodríguez-González,Hervey.
ABSTRACT The objective of our study was to assess the apparent digestibility of plant ingredients in diets for juvenile (50 g) and adult (220 g) Nile tilapia (Oreochromis niloticus). Dietary dry matter and protein apparent digestibility coefficients of four plant-derived feedstuffs (chickpea, maize, high-quality maize protein, and beans) were tested. The beans diet had the lowest apparent digestibility coefficient of dry matter (ADCDM) (69.41%), while no significant differences were detected in ADCDM among the other diets; ADCDM was significantly higher in adults compared with juveniles (77.02 vs. 73.76%). Apparent dry matter digestibility coefficient of ingredients (ADCI) was significantly higher in the chickpea (70.48%) and high-quality protein maize...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adults; Feedstuffs; In vivo digestibility; Juveniles; Plant ingredients.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000800427

Application of certain herbicides alone and in combination in corn plantings
Provedor de dados: 106
Autores: Suwunnamek, U.; Cheuysai, S.
2 tables
Palavras-chave: Corn maize weeds herbicides alachlor metolachlor 2; 4-D propachlor linuron cyanazine atrazine ข้าวโพด วัชพืช สารกำจัดวัชพืช อะลาคลอร์ เมทโธลาคลอร์ ทูโฟร์-ดี โปรพาคลอร์ ลินูรอน ไซยานาซีน อาทราซีน.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3975

Application of decision support methods in preparation for a Hungarian bio-fuel programme
Provedor de dados: 31
Autores: Lakner,   Zoltan; Vizvari,   Bela.
Under current market circumstances and those predictable in the near future, further increasing agricultural production seems to be rather groundless. By utilising agro-ecological conditions more efficiently, one eighth of Hungary’s gasoline demand could be satisfied from maize production, without considerably decreasing current agricultural production for human and animal consumption. For realisation of biofuel programmes a relatively stable socio-economic environment is essential. There is considerable pressure on government from different stakeholders to shift the risks of large-scale investments to the state budget. In the long-run, under the conditions of a liberalised world market the feasibility of biofuel-programmes based on European raw materials,...
Tipo: Journal Article
Palavras-chave: Agro-ecological potential; Land usage; Linear programming; Deterministic modelling; Multi-issue actor analysis; Agricultural and Food Policy; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/48087

Application of herbicides in corn
Provedor de dados: 106
Autores: Somchart Kanjanajirawong; Maneesa Teerawatsakul; Prakob Jan-Aram; Boonguer Poosri.
1 table
Palavras-chave: Corn maize herbicides weeds weed control pre-emergence post-emergence atrazine metolachlor cyanazine alachlor 2; 4-D linuron ข้าวโพด สารกำจัดวัชพืช สารกำจัดวัชพืชแบบก่อนงอก สารกำจัดวัชพืชแบบหลังงอก อาทราซีน เมทโธลาคลอร์ ไซยานาซีน อะลาคลอร์ ทูโฟร์-ดี ลินูรอน.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3934

Application of herbicides in corn
Provedor de dados: 106
Autores: Somchart Kanjanajirawong; Maneesa Teerawatsakul.
Palavras-chave: Corn maize herbicides weed control pre-emergence post-emergence atrazine metolachlor cyanazine alachlor 2; 4-D linuron ข้าวโพด สารกำจัดวัชพืช สารกำจัดวัชพืชก่อนงอก สารกำจัดวัชพืชแบบหลังงอก อาทราซีน เมทโธลาคลอร์ ไซยานาซีน อะลาคลอร์ ทูโฟร์-ดี ลินูรอน.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3937

Application of herbicides in corn
Provedor de dados: 106
Autores: Somchart Kanjanajirawong; Maneesa Teerawatsakul.
1 table
Palavras-chave: Corn; Maize; Herbicides; Weed control; Atrazine; Alachlor; ข้าวโพด; การควบคุมวัชพืช; อาทราซีน; อะลาคลอร์.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3857

Application of index selection in a maize population
Provedor de dados: 106
Palavras-chave: Corn; Maize; Maize population; Index selection; ข้าวโพด; ประชากรข้าวโพด; ดัชนีการคัดเลือก.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3817

Application of microbial α-amylase in industry - A review
Provedor de dados: 58
Autores: Souza,Paula Monteiro de; Magalhães,Pérola de Oliveira e.
Amylases are one of the main enzymes used in industry. Such enzymes hydrolyze the starch molecules into polymers composed of glucose units. Amylases have potential application in a wide number of industrial processes such as food, fermentation and pharmaceutical industries. α-Amylases can be obtained from plants, animals and microorganisms. However, enzymes from fungal and bacterial sources have dominated applications in industrial sectors. The production of α-amylase is essential for conversion of starches into oligosaccharides. Starch is an important constituent of the human diet and is a major storage product of many economically important crops such as wheat, rice, maize, tapioca, and potato. Starch-converting enzymes are used in the production of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Α-Amylases; Enzyme production; Bacterial and fungal amylase; Starch.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400004

Application of Stochastic Dynamic Programming (SDP) for the optimal allocation of irrigation water under capacity sharing arrangements
Provedor de dados: 31
Autores: Gakpo,   E.F.Y.; Tsephe,   J.; Nwonwu,   F.; Viljoen,   Machiel F.
This study attempts to arrive at an optimal allocation of irrigation water using capacity sharing (CS) as an institutional arrangement, and stochastic dynamic programming (SDP) as an optimisation model. It determines the value of an additional unit of water under a crop enterprise mix of lucerne-maize-wheat (LMW). SDP is an improvement on linear programming (LP) under stochastic conditions. The SIM-DY-SIM Model was used to simulate optimal returns, decision and policy variables under varying conditions of capacity share. LP results show that wheat has the highest MVP of R0.39/m3, with maize exhibiting the lowest value of R0.09/m3. The MVPs generated with SDP range between R0.06/m3 and R0.35/m3 on the whole farm basis, with revenue to the farmer increasing...
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/31704

Application of the Hybrid-Maize model for limits to maize productivity analysis in a semiarid environment
Provedor de dados: 63
Autores: Liu,Yi; Yang,Shenjiao; Li,Shiqing; Chen,Fang.
Effects of meteorological variables on crop production can be evaluated using various models. We have evaluated the ability of the Hybrid-Maize model to simulate growth, development and grain yield of maize (Zea mays L.) cultivated on the Loess Plateau, China, and applied it to assess effects of meteorological variations on the performance of maize under rain-fed and irrigated conditions. The model was calibrated and evaluated with data obtained from field experiments performed in 2007 and 2008, then applied to yield determinants using daily weather data for 2005-2009, in simulations under both rain-fed and irrigated conditions. The model accurately simulated Leaf Area Index , biomass, and soil water data from the field experiments in both years, with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop simulation; Maize model; Potential productivity; Water stress; Spring maize.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000500003

Application of zinc to corn grown in calcareous soils
Provedor de dados: 106
Autores: Suwapan Ratanarat; Withaya Marsangsan; Tienchai Arayangkoon; Yupin Boon-ampol; Supaporn Ratanarat; Samnao Phetchawee.
4 tables
Palavras-chave: Corn; Maize; Zinc; Phosphate fertilizers; Fertilizers; Calcareous soil; Yields; ข้าวโพด; สังกะสี; หินปูน; อัตราการเจริญเติบโต.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4024

Application rate trials with a nuclear polyhedrosis virus to control Spodoptera frugiperda (Smith) on maize
Provedor de dados: 44
Autores: Cruz,Ivan; Figueiredo,Maria L. C.; Valicente,Fernando H.; Oliveira,António C.
Different concentrations of nuclear polyhedrosis virus were applied as aqueous suspensions using a tractor mounted or a backpack-manual sprayer to control Spodoptera frugiperda (Smith) larvae on maize (Zea mays L.). Larval mortality varied with the application equipment. For the tractor-mounted sprayer application of at least 2.5 x 10(12) P.I.B./ha was necessary to attain a control comparable to that obtained with the backpack-manual sprayer application (70.2%). For this application method it can be used the dose of 2.5 x 10(11) PI.B./ ha, butNPV persistence was very short. A greaterNPV persistence was obtained with doses over 1.25 x 10(12) P.I.B./ha (93.4% mortality). The occurrence of parasitoids in the experimental area increased larval mortality rate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Fall armyworm; Baculovirus; Biological control.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591997000100019

Applying Retrospective Demographic Models to Assess Sustainable Use: the Maya Management of Xa&amp;#8217;an Palms
Provedor de dados: 7
Xa&amp;#8217;an palm (Sabal yapa) has been used to thatch traditional Maya houses for over 3000 years. In the Yucatan Peninsula, this palm has been introduced to pasturelands, maize fields (milpas), and homegardens. These and other traditional management systems are usually believed to be sustainable, but there is as yet little evidence to support this hypothesis. Demographic models have been used for this purpose, mainly focusing on population growth rate (&amp;#955;). So far, retrospective analysis has not been applied, even though it examines how changes in the  the life cycle of a species, caused by different management regimes, affect its &amp;#955;. In this study, we assess whether ecologically sustainable use of xa&amp;#8217;an occurs in...
Tipo: Peer-Reviewed Reports
Palavras-chave: Ethnoecology; LTRE; Mexico; NTFP; Sabal yapa; Traditional management; Xa&amp;#8217an palm; Yucatan.
Ano: 2005

Approche méthodologique. Analyse de la compétitivité et l'évolution des avantages comparatifs dans la sous-région.
Provedor de dados: 31
Autores: Diallo,   Boubacar Cisse; Crawford,   Eric W.; Dembele,   Niama Nango.
Tipo: Working or Discussion Paper
Palavras-chave: Mali; Food security; Rice; Maize; West Africa; Competivity; Agricultural and Food Policy; Community/Rural/Urban Development; Demand and Price Analysis; Food Security and Poverty; International Development; International Relations/Trade; Q12; Q18; Q17; Q13.
Ano: 2009
URL: http://purl.umn.edu/58550

Aptitud combinatoria y estabilidad de líneas de alto rendimiento derivadas de maíz exótico tropical.
Provedor de dados: 32
Autores: Pérez López, Francisco Javier.
Para generar híbridos de maíz (Zea mays L.) de cruza simple de manera rentable, es necesario que las líneas progenitoras hembras sean de alto rendimiento y que los híbridos generados, así como sus líneas parentales muestren buena estabilidad y adaptación ante los cambios en los ambientes de producción. El objetivo de este trabajo fue estimar la aptitud combinatoria general y aptitud combinatoria específica de 10 líneas de maíz altamente homocigóticas y de alta capacidad de rendimiento, derivadas de poblaciones de maíces exóticos adaptados a condiciones de clima templado, para emplearlas como progenitoras de híbridos de cruza simple; y determinar a través de métodos multivariados (AMMI y SREG) la estabilidad y adaptación de dichas líneas y de sus híbridos...
Palavras-chave: Zea mays L.; Adaptación; Aptitud combinatoria; Alto rendimiento; Estabilidad; Germoplasma exótico; Adaptation; Combinatory ability; High yield; Stability; Exotic germplasm; Genética; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2148

Arbuscular mycorrhizal fungi and colonization stimulant in cotton and maize
Provedor de dados: 65
Autores: Salgado,Fabrício Henrique Moreira; Moreira,Fátima Maria de Sousa; Siqueira,José Oswaldo; Barbosa,Ricardo Henrique; Paulino,Helder Barbosa; Carneiro,Marco Aurélio Carbone.
ABSTRACT: The objective of this study was to evaluate the effects of inoculation with different arbuscular mycorrhizal fungi native to Cerrado, associated with the application of colonization stimulant (7-hydroxy, 4’-methoxy-isoflavone) at the initial growth of cotton and maize plants in a greenhouse. The experiment was carried out in a completely randomized design and 7x2 factorial scheme, with five species of arbuscular mycorrhizal fungi and combined inoculation (uniting all species in equal proportion) and native fungi, in the presence and absence of colonization stimulant in maize and cotton crops. Shoots dry matter (SDM), roots dry matter (RDM), mycorrhizal colonization and accumulation of calcium, zinc and phosphorus in the SDM were evaluated at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea may; Gossypium hirsutum L; Formononetin; Mycorrhiza.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600202

Arbuscular mycorrhizal fungi within agroforestry and traditional land use systems in semi-arid Northeast Brazil - doi: 10.4025/actasciagron.v35i3.16213
Provedor de dados: 1
Autores: Sousa, Carla Silva; Universidade Federal de Pernambuco; Menezes, Rômulo Simões Cezar; Universidade Federal de Pernambuco; Sampaio, Everardo Valadares de Sá Barretto; Universidade Federal de Pernambuco; Lima, Francisco Sousa; Universidade Federal do Recôncavo da Bahia; Oehl, Fritz; Agroscope Reckenholz-Tänikon Research Station; Maia, Leonor Costa; Universidade Federal de Pernambuco.
The diversity of arbuscular mycorrhizal fungi (AMF) can be a critical factor in enhancing both the productivity and the diversity of plants in ecosystems, and the plants in the ecosystem also strongly influence the occurrence of these fungi. The relationships between different land use systems and AMF communities in the semi-arid region of the State of Paraíba, NE Brazil were evaluated. The experiment followed a split-plot randomized block design, with four replicates. The main plots were defined by the presence or absence of trees (gliricidia and maniçoba), while the split plots were defined by three land use systems: 1) traditional cropping of maize + beans, 2) buffel grass pasture, and 3) prickly pear forage crop. The presence of trees increased...
Palavras-chave: Ciencia do solo; Microbiologia agrícola mycorrhizae; Agroecosystems; Glomalin.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16213

Archaeological material for the study of crop evolution
Provedor de dados: 63
Autores: Freitas,Fábio de Oliveira; Martins,Paulo Sodero.
This research studies archaeological samples of maize (Zea mays mays) and cassava (Manihot esculenta), from Januaria, MG, Brazil, for samples between 1010 (for the oldest sample) and 570 years (for the most recent) as estimated through radiocarbon dating. Maize cobs were morphologically analysed by using length, basal and apical diameters, largest diameter, number of rows, number of grains per row, and number of grains per row per length parameters. The maize cob length presented increases through time, allowing an increase on the number of seed per cob, but the size of seeds did not vary significantly. Starch present in the reserve organs of the maize and cassava were analysed morphologically through Scanning Electron Microscopy, and compared to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Manihot esculenta; Archaeology; Indigenous; Starch.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200027

Are high-lysine cereal crops still a challenge?
Provedor de dados: 56
Autores: Ferreira,R.R.; Varisi,V.A.; Meinhardt,L.W.; Lea,P.J.; Azevedo,R.A.
The essential amino acids lysine and threonine are synthesized in higher plants via a pathway starting with aspartate that also leads to the formation of methionine and isoleucine. Lysine is one of most limiting amino acids in plants consumed by humans and livestock. Recent genetic, molecular, and biochemical evidence suggests that lysine synthesis and catabolism are regulated by complex mechanisms. Early kinetic studies utilizing mutants and transgenic plants that over-accumulate lysine have indicated that the major step for the regulation of lysine biosynthesis is at the enzyme dihydrodipicolinate synthase. Despite this tight regulation, recent strong evidence indicates that lysine catabolism is also subject to control, particularly in cereal seeds. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lysine; Threonine; Aspartate; Nutritionally improved crops; Methionine; Amino acids.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700002

Are Staple Foods Becoming More Expensive For Urban Consumers In Eastern And Southern Africa? Trends in Food Prices, Marketing Margins, and Wage Rates in Kenya, Malawi, Mozambique, and Zambia
Provedor de dados: 31
Autores: Mason,   Nicole M.; Jayne,   Thomas S.; Donovan,   Cynthia; Chapoto,   Antony.
The world food and financial crises threaten to undermine the real incomes of urban consumers in eastern and southern Africa. This study investigates patterns in staple food prices, wage rates, and marketing margins for urban consumers in Kenya, Malawi, Mozambique, and Zambia between 1993 and 2009. There is high correlation among wage rate series for various government and private sector categories. We find that average formal sector wages rose at a faster rate than retail maize meal and bread prices in urban Kenya and Zambia between the mid-1990s and 2007. Although the 2007/08 food price crisis partially reversed this trend, the quantities of staple foods affordable per daily wage in urban Kenya and Zambia during the 2008/09 marketing season were still...
Tipo: Working or Discussion Paper
Palavras-chave: Africa; Agriculture; Food security; Prices; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Security and Poverty; Labor and Human Capital; Marketing; Q11.
Ano: 2009
URL: http://purl.umn.edu/53451

Armazenamento de milho em fazendas.
Provedor de dados: 14
Autores: MANTOVANI, B. H. M.
bitstream/item/46851/1/Armazenamento-milho.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Maize.; Armazenamento; Milho; Zea Mays.; Storage.
Ano: 1977
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476451

Armazenamento do milho: dos paiois aos silos subterrâneos.
Provedor de dados: 14
Autores: FONTES, R. de A.
bitstream/item/53897/1/Armazenamento-milho.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Maize.; Armazenamento; Milho; Zea Mays.; Storage.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476445

Armazenamento e controle de pragas do milho.
Provedor de dados: 14
Autores: SANTOS, J. P. dos; CRUZ, I.; FONTES, R. de A.
Controle de pragas no milho armazenado; Pragas principais; Controle de insetos; Controle de roedores; Estruturas para o armazenamento de milho; Armazenamento de milho em espigas; Armazenamento de milho em sacas; Armazenamento de milho a granel; Armazenamento de milho em silos subterraneos.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Controle de praga; Maize.; Armazenamento; Milho; Praga; Zea Mays.; Pest control; Pests; Storage.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476466

Arranjos e populações de plantas de milho e feijão no sistema consorciado em Sergipe.
Provedor de dados: 14
Autores: SIQUEIRA, L. A.; SOBRAL, L. F.
bitstream/item/69094/1/CPATC-COM.-TEC.-02-79.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Consórcio de planta; Brasil; Sergipe; Maize.; Feijão; Milho.; Beans; Intercropping.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/355739

Artenreiches Rauhfutter als Alleinfutter und Fettsäurenmuster der Milch
Provedor de dados: 21
Autores: Leiber, Florian; Kreuzer, Michael; Scheeder, Martin R.L.; Wettstein, Hans-Ruedi.
In two experiments it was investigated which factors to what extent determine the fatty acid composition milk when cows are grazing high alpine pastures. The influences of altitude per se, of alpine forage quality, of concentrate-free diet type and of the overall grazing effect were separated by the experimental design. The most important factor which significantly elevated the concentrations of CLA, α-linolenic acid (ALA) and n-3 PUFA in milk fat was found to be the alpine diet type, i.e. the feeding of roughage-only (as well hay as pasture of as well lowland as alpine origin) with omission of concentrates and maize. Additionally a clear positive effect of the forage quality of alpine pastures on ALA concentration in milk fat was found. The latter effect...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Dairy cattle Feeding and growth.
Ano: 2005
URL: http://orgprints.org/3659/1/3659.pdf

Arthropod food webs in organic and conventional wheat farming systems of an agricultural long-term experiment: a stable isotope approach
Provedor de dados: 21
Autores: Birkhofer, K.; Fließbach, A.; Wise, D.H.; Scheu, S.
1 Agricultural intensification not only alters the structure of arthropod communities, but also may affect biotic interactions by altering the availability of basal resources. We analyzed variations in stable isotope ratios (15N/14N and 13C/12C) of fertilizers, plants, prey and generalist predators in organic and conventional farming systems in a long-term agricultural experiment [DOK trial (bioDynamic, bioOrganic, Konventionell)]. Two basal resources with pronounced differences in carbon isotope signatures, wheat litter (C3 plant) and maize litter (C4 plant), were used to uncover differences in food web properties between the two farming systems (conventional versus organic).  2 Predators incorporated significantly higher proportions of carbon from wheat...
Tipo: Journal paper
Palavras-chave: Soil quality Cereals; Pulses and oilseeds Biodiversity and ecosystem services.
Ano: 2011
URL: http://orgprints.org/21781/1/birkhofer-etal-2011-AgrForestEntomol-Vol13-p197-204_abstract.pdf

Artificial inoculation with Stenocarpella maydis in hybrids of maize
Provedor de dados: 22
Autores: Rizzardi, Diego Ary; Faria, Cacilda Marcia Duarte Rios; Faria, Marcos Ventura; Mendes, Marcelo Cruz; Rossi, Evandrei Santos; Figueiredo, Alex Sandro Torre; Possato Junior, Omar.
Evaluate the behavior of commercial corn hybrids, with or without artificial inoculation of Stenocarpella. Maydis fungus was aimed by this work. Experiments were conducted along the harvesting periods of 2010/11 and 2011/12, in Guarapuava - PR. Treatments were evaluated in a factorial scheme 4x2, being four hybrids of corn (DKB245, DKB390Y, P30F53H and P30R50H) with and without artificial inoculation with fungus S. maydis. Delineation was in randomized full blocks in a factorial scheme. The following characteristics were evaluated, amount of rancid grains, weight of a thousand grains and yield of grains.  Results evidenced hybrid DKB390Y with genotype more susceptible to fungus S. maydis independent of agricultural harvest and presence or not of artificial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rancind grains; White ear rot; Zea mays L.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14247

Artificial Neural Network Methodology for Modelling and Forecasting Maize Crop Yield
Provedor de dados: 31
Autores: Singh,   Rama Krishna; Prajneshu.
A particular type of “Artificial neural network (ANN)”, viz. Multilayered feedforward artificial neural network (MLFANN) has been described. To train such a network, two types of learning algorithms, namely Gradient descent algorithm (GDA) and Conjugate gradient descent algorithm (CGDA), have been discussed. The methodology has been illustrated by considering maize crop yield data as response variable and total human labour, farm power, fertilizer consumption, and pesticide consumption as predictors. The data have been taken from a recently concluded National Agricultural Technology Project of Division of Agricultural Economics, I.A.R.I., New Delhi. To train the neural network, relevant computer programs have been written in MATLAB software package using...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/47354

As, Cu AND Zn CONCENTRATION IN SANITARY SEWAGE SLUDGE FERTILIZED SOIL AND IN CRAMBE AND CORN GRAINS
Provedor de dados: 70
Autores: Cardoso,Paulo H. S.; Sousa,Izabelle de P.; Junio,Geraldo R. Zuba; Gonçalves,Paula W. B.; Sampaio,Regynaldo A.
ABSTRACT This study aimed to evaluate the total contents of As, Cu and Zn in the profile of a Haplic Cambisol cultivated with crambe and corn and fertilized with sanitary sewage sludge and to compare them with those obtained in other forms of fertilization, as well as the content of metals in the grain of these crops. Two experiments were carried out in the field, one with maize cultivation and another with crambe, both were delineated as randomized blocks with four treatments and six replicates, which were: without fertilization, fertilization with sewage sludge dewatered and dried in the sun, with dry sewage sludge and with mineral fertilizers. At the end of the experiments soil samples were collected at 15, 50, 100, 150 and 200 cm depth for analysis of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosolid; Crambe abyssinica; Organic fertilization; Zea mays.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300426

As Perspectivas da Comercialização Agrícola do Ano 2008:Vozes das Zonas Rurais
Provedor de dados: 31
Autores: Equipe Tecnica do SIMA.
Resultados das Investigações do SIMA-Departamento de Estatística e Departamento de Análise de Políticas MINAG - Direcção de Economia – Dpto. Estatística
Tipo: Report
Palavras-chave: Food security; Food policy Mozambique; Marketing; Marketing; Q18.
Ano: 2008
URL: http://purl.umn.edu/55259

Aspectos da biologia da cigarrinha-do-milho, Dalbulus maidis (DeLong &amp;amp; Wolcott) (Hemiptera: Cicadellidae)
Provedor de dados: 44
Autores: Waquil,José M.; Viana,Paulo A.; Cruz,Ivan; Santos,Jamilton P.
Na cultura do milho, a cigarrinha, Dalbulus maidis (DeLong &amp;amp; Wolcott) (Hemiptera: Cicadellidae) é vetora de três patógenos: Spiroplasma kunkelii (corn stunt spiroplasma), o fitoplasma do milho (maize bushy stunt phytoplasma) e o vírus da risca do milho (maize rayado fino vírus). Os prejuízos causados por essas doenças podem variar de nove a 90 %, dependendo da susceptibilidade das cultivares e dos patógenos envolvidos. O objetivo deste trabalho foi estudar aspectos da biologia de D. maidis, sob condições controladas e utilizando-se insetos e cultivares de milho e sorgo adaptados às condições brasileiras. Plântulas de milho e de sorgo foram cultivadas em vasos plásticos, cobertas com gaiolas de plástico e infestadas com 10 adultos por planta. Sempre...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Zea mays; Milho; Vetor; Praga; Doença.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591999000300005

Aspectos econômicos em sistemas de produção com culturas alimentares para agricultores de baixa renda na Microrregião Bragantina, Pará.
Provedor de dados: 14
Autores: FRAZAO, D. A. C.; HOMMA, A. K. O.; ANDRADE, E. B. de.
bitstream/item/28816/1/CPATU-BP6.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pequeno agricultor; Caupi; Cultivo; Consorciacao; Rotação; Pará; Zona Bragantina; Brasil; Production systems; Economy; Maize; Cowpea; Culture; Rotation.; Economia; Mandioca; Mão-de-Obra; Milho; Sistema de Produção.; Amazonia; Cassava; Intercropping; Labor force; Small farms.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376816

ASPETTI COMPORTAMENTALI, PRESTAZIONI PRODUTTIVE E QUALITÀ DELL'UOVO IN GALLINE ALLEVATE CON IL METODO BIOLOGICO
Provedor de dados: 21
Autores: CASTELLINI, Prof C; MUGNAI, Dr C; DAL BOSCO, dr A; PALOZZO, dr M; SCUOTA, dr S.
The aim of this trial was to study the effect of organic housing system on the behaviour, productive performance and the qualitative characteristics of eggs. The experiment was conduced directly in the field on Hy-Line laying hens from the beginning of the productive period (17 weeks of age) till the end of productive career. The animals were divided in two homogeneous groups and assigned to the following housing system: control, conventional cage (18 bird/m2) and organic 6 birds m2 in a covered straw-bedded house with access to a paddock (4 m2/bird). A standard feed with the same nutritive characteristics was given ad libitum to the chickens. For the organic, more  than 80% of the ingredients (maize, wheat and whole soybean) were organically grown, as...
Tipo: Journal paper
Palavras-chave: Poultry; Health and welfare.
Ano: 2004
URL: http://orgprints.org/9326/1/p41%2D44%2DRicerca.pdf

Assessing impacts of CAP reform in France and Germany
Provedor de dados: 31
Autores: Kupker,   Bernd; Huttel,   Silke; Kleinhanss,   Werner; Offermann,   Frank.
The 2003 CAP Reform left EU member states much room for national implementation. The farm group model EU-FARMIS is applied to quantify the effects of the reform and the impacts of the options for national implementation. The analysis is done for France and Germany because their implementation schemes adequately reflect the broad range of options. It is found that cereal and fodder maize production is reduced both in France and Germany. In contrast, the acreage of other arable fodder crops, of set-aside and of non-food crops is expanded. While bull fattening is substantially reduced in both countries, suckler cow production is extended in France due to partial decoupling, but reduced in Germany due to full decoupling. Sectoral income effects measured in...
Tipo: Journal Article
Palavras-chave: CAP Reform; Decoupling; Farm group model; FADN; Agricultural and Food Policy; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/97189

Assessing long- and short-term trends in cereal yields: the case of Chile between 1929 and 2009
Provedor de dados: 118
Autores: Engler,Alejandra; del Pozo,Alejandro.
Cereal grain yields have increased worldwide during the 20th century as a consequence of plant breeding, improved cultural practices and intensive use of inputs. However, there is evidence that there are differences in yield pattern evolution across countries and cereals. The purpose of this study was to compare trends in the yields of the most commonly produced cereals in Chile, namely wheat, oat, barley, maize and rice, to identify similarities in trends across crops and to estimate long-term growth rates in the yields and their changes over time. Data for wheat, barley, oat, rice and maize yields between 1929 and 2009 were obtained from the Chilean Oficina de Estudios y Políticas Agrarias (ODEPA). A first-order autoregressive (AR1) model with trend was...
Tipo: Journal article
Palavras-chave: Barley; Oat; Maize; Rice; Wheat; Yield progress.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100005

Assessing loss caused by the corn stem borer (Ostrinia furnacalis Guenee) to field corn
Provedor de dados: 106
Autores: Auranuj Kongkanjana; Watchara Choonhawong; Boonsom Meksongsee.
1 ill., 1 table
Palavras-chave: Corn; Maize; Stem borers; Ostrinia furnacalis; Linear regression; ข้าวโพด; หนอนเจาะลำต้น; ผลผลิต; การประเมินความเสียหาย.
Ano: 1984
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4481

Assessing nitrogen flow in production and utilization cycle of wheat and maize as a tool to monitor N loss in Iran - doi: 10.4025/actascibiolsci.v35i3.16039
Provedor de dados: 3
Autores: Koocheki, Alireza; Ferdowsi University of Mashhad; Nassiri Mahallati, Mehdi; Ferdowsi University of Mashhad; Mansoori, Hamed; Ferdowsi University of Mashhad; Moradi, Rooholla; Ferdowsi University of Mashhad.
Increasing resource use efficiency is crucial for enhancement of agricultural productions and reducing environmental hazards. For this purpose, improvement of Nitrogen use efficiency is an effective approach. Not only N loss occurs in field but also in processing course of food utilization. The objective of this study was to evaluate N loss and efficiency from production to consumption for wheat and maize. For this purpose, data for the amount of applied nitrogen, acreage, yields, amount of returned residue were collected and a proportion of N allocated to different source of food or feed was also traced. Results showed that total N harvested by wheat and maize were 387 and 81.7 kt and N use efficiency for the same crops were 25 and 60%, respectively....
Palavras-chave: N use efficiency; N loss; Nutrient management; Fertilizer Environment.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/16039

Assessing rural consumers’ WTP for orange, biofortified maize in Ghana with experimental auctions and a simulated radio message
Provedor de dados: 31
Autores: De Groote,   Hugo; Tomlins,   Keith; Haleegoah,   Joyce; Awool,   Manfred; Frimpong,   Benedicta; Banerji,   Abijit; Chowdury,   Shyamal K.; Meenakshi,   J.V.
Deficiencies of micronutrients such as vitamin A are widespread, expecially in Africa. Biofortified crops such as maize, bred for high levels of provitamin A might offer a solution, but these crops are often bright orange, and African maize consumers prefer white. To estimate the consumers interest in orange biofortified maize, sensory evaluations were organized in rural Ghana with white, yellow and orange maize. The effect of information on willingness to pay for biofortification was estimated using a simulated radio message. Results indicate that color preferences are highly regional, wide variation exist within regions, and the provision of information is able to change these preferences. The color of biofortified maize should therefore not be seen as...
Tipo: Journal Article
Palavras-chave: Maize; Biofortification; Consumers; Experimental auction; Sensory evaluation; Crop Production/Industries; Demand and Price Analysis.
Ano: 2010
URL: http://purl.umn.edu/96197

Assessing the benefits of research expenditures on maize production in South Africa
Provedor de dados: 31
Autores: Townsend,   Rob F.; van Zyl,   Johan; Thirtle,   Colin G.
This paper focuses on assessing the benefits of research expenditures on maize production in South Africa. Both the production and supply function approaches are used to calculate elasticities of research expenditure on output and yield. Cointegration is used to establish long-run relationships between variables in these models. The lag structure of R&amp;D expenditures on output is examined making use of the unrestricted, polynomial, beta and gamma distributions. The coefficients of these lag distributions were then used to calculate a rate of return to maize research expenditure, which was estimated as being between 28% and 39% per annum. These rates of return are high, mitigating in favour of more research expenditure rather than less.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1997
URL: http://purl.umn.edu/54718

ASSESSING THE IMPACT OF HGH-YIELDING VARIETIES OF MAIZE IN RESETTLEMENT AREAS OF ZIMBABWE
Provedor de dados: 31
Autores: Bourdillon,   Michael; Hebinck,   Paul; Hoddinott,   John; Kinsey,   Bill; Marondo,   John; Mudege,   Netsayi; Owens,   Trudy.
Tipo: Report
Palavras-chave: Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/15930

ASSESSING THE IMPACT OF HIGH-YIELDING VARIETIES OF MAIZE IN RESETTLEMENT AREAS OF ZIMBABWE
Provedor de dados: 31
Autores: Bourdillon,   Michael; Hebinck,   Paul; Hoddinott,   John; Kinsey,   Bill; Marondo,   John; Mudege,   Netsayi; Owens,   Trudy.
This study is part of a larger effort to explore the impact of agricultural research on poverty reduction. It examines the diffusion and impact of hybrid maize in selected resettlement areas of rural Zimbabwe, paying particular attention to varieties made widely available from the mid-1990s onwards. While “Zimbabwe’s Green Revolution” of the early 1980s was characterized by the widespread adoption of hybrid maize varieties and significant increases in yields, the subsequent diffusion of newer varieties occurred more slowly and had a more modest impact. Several factors account for this. Government now plays a much-reduced role and one that increasingly focuses on “better farmers.” Private-sector institutions that have entered the maize sector operate mainly...
Tipo: Working or Discussion Paper
Palavras-chave: Poverty; Agricultural research; Sustainable livelihoods; Vulnerability; Agricultural extension; Social capital; Hybrid maize; Zimbabwe; Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/16407

Assessing the Impact of the National Agricultural Advisory  Services (NAADS) in the Uganda Rural Livelihoods
Provedor de dados: 31
Autores: Benin,   Samuel; Nkonya,   Ephraim M.; Okecho,   Geresom; Pender,   John L.; Nahdy,   Silim; Mugarura,   Samuel; Kato,   Edward; Kayobyo,   Godfrey.
The National Agricultural Advisory Services (NAADS) program of Uganda is an innovative public-private extension service delivery approach, with the goal of increasing market oriented agricultural production by empowering farmers to demand and control agricultural advisory services. Although initial evaluations of NAADS have been quite favourable, these evaluations have been primary qualitative in nature. This study quantifies the initial impacts of NAADS in the districts and sub-counties where the program was operating by 2005. It is based on descriptive analyses of results of a survey of 116 farmer groups and 894 farmers in sixteen districts where the program was operating at the time and four districts where NAADS had not yet begun operating to control...
Tipo: Working or Discussion Paper
Palavras-chave: Impact assessment; Agricultural extension; Uganda; Community/Rural/Urban Development; Teaching/Communication/Extension/Profession.
Ano: 2007
URL: http://purl.umn.edu/42375

Assessing the influence of neighborhood effects on the adoption of improved agricultural technologies in developing agriculture
Provedor de dados: 31
Autores: Langyintuo,   Augustine S.; Mekuria,   Mulugetta.
Researchers generally assume spatial homogeneity when assessing the factors that influence farmers to adopt improved agricultural technologies. However, the potential for spatial heterogeneity is high due to, for example, neighborhood effects such as farmers sharing information about new technology. Ignoring spatial heterogeneity can result in biased or inefficient regression estimates and make inferences based on t and F statistics misleading. Using data collected from 300 randomly selected farmers in three districts of Mozambique during the 2003/04 crop season, a spatial Tobit model was specified to estimate which factors determined the adoption of improved maize varieties, after an initial diagnostic test rejected the null hypothesis of spatial...
Tipo: Journal Article
Palavras-chave: Spatial Tobit model; Spatial heterogeneity; Spatial autocorrelation; Neighborhood effects; Maize farmers; Mozambique; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/56960

ASSESSING THE POTENTIAL IMPACT OF BT MAIZE IN KENYA USING A GIS BASED MODEL
Provedor de dados: 31
Autores: De Groote,   Hugo; Overholt,   William; Ouma,   James Okuro; Mugo,   Stephen.
The Insect Resistant Maize for Africa (IRMA) project  is currently developing Bt maize for Kenya. So far, Bt genes with resistance to Chilo partellus, Chilo orichalcociliellus, Eldana Sacharina, and Sesamia calamistis, four of the five major stemborers were successfully incorporated into elite CIMMYT maize inbred line (CML216) and tested in insect bioassays in Kenya. Participatory Rural Appraisals showed that stem borers are indeed a major pest problems for farmers. Four seasons of on-farm crop loss assessment showed an average crop loss of 13.5%, or 0.4 million tons, valued at US$ 80 million. If the project manages to find a Bt gene that is effective to the fifth stemborer, Busseola fusca, adoption rates are likely to be high, and therefore the returns....
Tipo: Conference Paper or Presentation
Palavras-chave: Maize; Africa; Genetically Modified Crops; Bt crops; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/25854

Assessing the Transferability of Transpiration-use Efficiency Models of Biomass Production
Provedor de dados: 117
Autores: Kremer,Cristián; Stöckle,Claudio.
Transpiration-use efficiency (w), defined as the ratio of biomass produced per unit water transpired, has been used to evaluate crop performance under limited water supply. However, the lack of consistency of w values through different environmental conditions has not allowed, using it as a transferable parameter. Thus, simple approaches have been developed, including: 1) w = kDa Da¹ and; 2) w = kEto ETo-¹ where kDa and kETo are crop-dependent parameters, with the underlying concept that normalization by Da or ET0 would accounts for the effects of climate variations on w, while these parameters would be reasonably constant across diverse environments. The objective of this study was to assess the transferability of kDa and kET&amp;#094;0 for wheat...
Tipo: Journal article
Palavras-chave: Transpiration-use efficiency; Models of biomass production.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100002

Assessment of a SWAT model for soil and water management in India
Provedor de dados: 31
Autores: Kaur,   Ravinder; Srinivasan,   Raghavan; Mishra,   Kamal; Dutta,   D.; Prasad,   Durga; Bansal,   Gagan.
The potential of a Spatial Decision Support System (SDSS) for estimating water and sediment yields was assessed in a large (92.46 km2) experimental catchment in the Damodar-Barakar basin. The SDSS is based on a SWAT model and was operated under prevailing resource management conditions. Application of the proposed SDSS predicted average water and sediment yields of 383.37 mm yr-1 and 21.28 t ha-1 yr-1 were predicted as against actual observations of 390.69 mm yr-1 and 25.35 t ha-1 yr-1 for the validation periods 1981-1983; 1985-1989 and 1991. Simulations of the annual dynamics of total water and sediment yields showed good to moderately good correlation coefficients of 0.83 and 0.65; model efficiency coefficients of 0.54 and 0.70; mean relative errors of...
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/47873

Assessment of Alternative Maize Trade and Market Policy Interventions in Zambia
Provedor de dados: 31
Autores: Govereh,   Jones; Jayne,   Thomas S.; Chapoto,   Antony.
The economic reforms in maize marketing and trade policies implemented during the 1990s have been highly controversial, and there remains a lack of solid empirical investigation on the impacts of these reforms on national food security, price stability and rural income growth. This study aims to provide a detailed evidence-based analysis of the impacts of maize marketing and trade policies on smallholder agricultural production growth, access to food by consumers, and other important national policy objectives. These insights from Zambia can hopefully move forward the continuing debate in the region on how maize marketing and trade policies should be structured in the future.
Tipo: Report
Palavras-chave: Food security; Policy; Zambia; Africa; Maize; Trade; Crop Production/Industries; Marketing; Q18.
Ano: 2008
URL: http://purl.umn.edu/54492

ASSESSMENT OF BARI INCLINED PLATE PLANTER AND EVALUATION OF DIFFERENT TILLAGE METHODS
Provedor de dados: 111
Autores: Hoque, Muhammad Arshadul.
Engineering parameters of the bed planter and the inclined plate planter for bed planting, minimum tillage, strip tillage and conventional tillage cum hand planting methods were estimated at Gazipur.  Field tests of the machines for different tillage practices were conducted at Gazipur, Pabna, and Barisal. Field tests were conducted with four treatments: Bed planting with inclined plate seed metering, minimum tillage with inclined plate planter, strip tillage with inclined plate planter and conventional tillage and hand planting. All the treatments were replicated thrice with RCB design. The planter was tested for sowing maize, wheat and mungbean during 2012-13. Bed planting, minimum tillage and strip till methods required 26%, 30% and 57% less energy and...
Tipo: Info:eu-repo/semantics/article
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3294

Assessment of beneficial role of an insectivorous bird, jungle babbler (Turdoides striatus) predation, on Helicoverpa armigera infesting pigeon pea (Cajanus cajan) crop
Provedor de dados: 109
Autores: Bharucha,Bhavna; Padate,G. S.
Jungle babbler (Turdoides striatus), a widely spread sub-tropical insectivorous passerine is considered beneficial to agro-ecosystem, as they devour voraciously on insect matter especially Helicoverpa armigera, the gram pod borer, a notorious pest infesting and causing heavy loses to crops like pigeon pea (Cajanus cajan) which is a vital crop of semi-arid tropical and subtropical farming system, providing high quality vegetable protein. Helicoverpa is known to feed on flowers, pods, and seeds and is the most important biotic constraint affecting pigeon pea yields. Jungle babblers have a peculiar foraging style which helps expose the Helicoverpa larvae as well as pupae through various phenological stages of pigeon pea. For comparative assessment of their...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jungle babbler; Helicoverpa; Pigeon pea; Small pod stage; Large pod stage.
Ano: 2010
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122010000200012

ASSESSMENT OF CORN WATER UPTAKE BASED ON SAP HEAT TRACING UNDER WATER-STRESSED CONDITIONS
Provedor de dados: 91
Autores: Santos,Antonio Odair; Bergamaschi,Homero; Rosa,Luís M. G.; Bergonci,João I.; Radin,Bernadete.
ABSTRACT Crop water monitoring is an important aspect for precise control of irrigation. A reliable and movable technique is needed to properly assess water uptake of crops in the field. Water uptake by field grown maize ( Zea mays L.), in water-limited conditions was verified with the heat pulse system. The temperature difference between two radially inserted thermocouples, one 9 mm above and the other 4 mm below a heater piercing the maize stem, was measured every 0.3 sec following emission of a heat pulse in conditions of varied atmospheric demand. Comparisons of heat pulse system outputs and a high precision transpiration model estimates were done on hourly and daily basis, when low sap velocities were expected to occur. Hourly and daily basis of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sap flow; Transpiration; Water stress; Heat pulse.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43661999000200145

Assessment of DNA extraction methods from GMO analysis for grain monitoring in Mexico: Part II: quantification by real-time PCR
Provedor de dados: 115
Autores: Acatzi,Abraham; Galvez,Amanda; Plasencia,Javier; Quirasco,Maricarmen.
Because of their specificity and high throughput, real-time PCR-based methods are suitable for the monitoring of genetically modified (GM) organisms at field level or in the grain trade, in order to comply with federal regulations on biosafety. In the first part of this study, DNA extracted from different maize (Zea mays L.) tissues using several commercial purification protocols available in Mexico were evaluated in terms of DNA quality as substrates for end-point PCR. In this second part, DNA preparations obtained from grain, by means of the same commercial protocols, were tested in quantitative PCR (qPCR), using TaqMan and SYBR Green protocols. Linear dynamic range, amplification efficiency and method accuracy were assessed using recommended qPCR...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Quantitative PCR; PCR inhibition; GM maize; Genetically modified organism (GMO); DNA quality.
Ano: 2014
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000100003

Assessment of DNA extraction methods from various maize (Zea mays L.) tissues for environmental GMO monitoring in Mexico: Part I: detection by end-point PCR
Provedor de dados: 115
Autores: SanJuan-Badillo,Andrea; Galvez,Amanda; Plasencia,Javier; Quirasco,Maricarmen.
In Mexico, regulations for growing genetically modified (GM) maize (Zea mays L.) plants have been enforced in order to prevent gene flow to native landraces and wild relatives. Field surveys are necessary and Mexican government agencies have the mandate to perform them. Because of their specificity, PCR-based methods are suitable for field monitoring of GM organisms but it is necessary to assess their performance, since they are greatly influenced by the DNA preparation quality inherent to the extraction method. In this study, genomic DNA was extracted from various maize tissues (e.g. pollen, leaves, spikelets and grains) using five different commercial purification protocols. DNA quality was analyzed spectrophotometrically, by gel electrophoresis, and as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PCR inhibition; GM maize; Variability of DNA yield; DNA quantification; GMO detection.
Ano: 2014
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952014000100002

Assessment of genetic parameters of degradability in maize grains due to indentation scores
Provedor de dados: 63
Autores: Davide,Livia Maria Chamma; Ramalho,Magno Antônio Patto; Figueiredo,Ulisses José de; Souza,João Cândido de.
Maize (Zea mays L.) cultivars with dent grains present higher starch and dry matter ruminal degradability than those with flint grains. This study aimed to assess genetic parameters of degradability in maize grains of different textures and to verify whether there is an association between grain indentation score and ruminal dry matter (RDM) degradability. The evaluated progenies were obtained from the cross between the varieties Cristal (flint) and Cunha (dent), previously selected for grain hardness. Progenies were evaluated for an indentation score using a visual grading scale ranging from 1 (flint) to 5 (dent). To assess the RDM degradability, 5 g were cut into halves, weighed (five grams), stored in bags made of 100% "failet" cloth and incubated for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grain hardness; Ruminal dry matter degradability; Heritability.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300012

Assessment of the effectiveness of maize seed assistance to vulnerable farm households in Zimbabwe
Provedor de dados: 31
Autores: Langyintuo,   Augustine S.; Setimela,   Peter S.
The publication describes outcomes of a study to assess the effectiveness of a large-scale crop seed relief effort in Zimbabwe during 2003-07. Aims of the effort, which was supported by the British Department for International Development (DfID) and coordinated by the Food and Agricultural Organization (FAO) regional office in Harare, included broader diffusion of open-pollinated maize varieties (OPVs), as opposed to hybrids. Based on the findings of the study, the authors recommend that, to increase benefits to vulnerable groups, participants in such efforts should effectively disseminate information on selecting and recycling seed, supported by training and field demonstrations, and should target relatively well-endowed farmers initially. Recommendations...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural development; Technical aid; Farm income; Food production; Maize; Open pollination; Hybrids; Zimbabwe; Crop Production/Industries; International Development.
Ano: 2007
URL: http://purl.umn.edu/7655

Assessment of the Farm Level Agronomic and Financial Benefits of the Magoye Ripper in Maize and Cotton Production in Southern and Eastern Provinces
Provedor de dados: 31
Autores: Kabwe,   Stephen; Donovan,   Cynthia; Samazaka,   David.
This research focuses on the performance in the Magoye ripper in maize and cotton production in Eastern and Southern Provinces during the 2004/2005 productions year. Findings include the following: In maize production, the ripper enabled higher yields compared to traditional animal ploughing, by increasing the effectiveness of nitrogen fertilizer applications, resulting in net profits per hectare of ZK575,800 in Eastern Province and ZK93,800 in Southern Province; In cotton, the input applications and size of fields were the most important determinants of yield, and the ripper had no significant individual effect. Farmers using the ripper indicated that it helped conserve water, enabled early land preparation and early planting; and Farmers not using their...
Tipo: Report
Palavras-chave: Food security; Food policy; Zambia; Maize; Cotton; Inputs; Crop Production/Industries; Q18.
Ano: 2006
URL: http://purl.umn.edu/54623

Assessment of the Farm Level Financial Profitability of the Magoye RipperiIn Maize and Cotton Production in Southern and Eastern Provinces
Provedor de dados: 31
Autores: Kabwe,   Stephen; Donovan,   Cynthia; Samazaka,   David.
With the risk of the drought in the agricultural production areas of Zambia, conservation farming (CF) was introduced as a set of technologies that can improve productivity while reducing plant stress due to moisture constraints. Under animal traction, CF involves using the Magoye ripper to minimize soil disturbance in land preparation and to help improve water conservation, thus enhancing farmers’ land and labor productivity. This technology has been promoted by Golden Valley Agricultural Research Trust (GART) and other stakeholders in the agricultural sector in Zambia and shows promise in on-station and on-farm trials.  This research is based on actual farmer use of the ripper in Eastern and Southern Provinces in 2004/2005, a year with erratic rainfall...
Tipo: Report
Palavras-chave: Food security; Conservation Farming; Magoye Ripper; Zambia.; Africa; Agricultural Finance; Crop Production/Industries; Q18.
Ano: 2007
URL: http://purl.umn.edu/54482

Assessment of the suitability of land use for agriculture by analytical hierarchy process : AHP in lower Prachinburi watershed, eastern Thailand
Provedor de dados: 111
Autores: Rukanee, Duangthip; Sangchan, Songvoot; Choomjaihan, Prasan.
       The low Prachinburi watershed is a gateway to other regions of the country.  Due to a rapid increase in population there, there is also an increase in agricultural production area.  This study aims to assess the appropriateness of land use by using analytical hierarchy process (AHP) for land use planning.            Results of the study revealed that there is a moderate level of the appropriateness in land use development.  The most appropriate area (S1) accounts for 22.07 percent; the moderately appropriate area (S2) accounts for 54.15 percent; the lowly appropriate area (S3) accounts for 10.25 percent; and the inappropriate area accounts 13.52 percent of the area.  Regarding a guideline for agricultural area management, it is found to be mostly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Land suitability; Analytical hierarchy process; Watershed; Assessment; GIS.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5751

Assimilation of shrimp farm sediment by     Holothuria scabra     : a coupled fatty acid and stable isotope approach
Provedor de dados: 5
Autores: Mathieu-resuge, Margaux; Le Grand, Fabienne; Schaal, Gauthier; Kraffe, Edouard; Lorrain, Anne; Letourneur, Yves; Lemonnier, Hugues; Benoît, Julie; Hochard, Sébastien.
Deposit-feeding sea cucumbers are efficient nutrient recyclers and have the potential to contribute to the limitation of organic matter load in polyculture or integrated aquaculture systems. Assessing how they assimilate organic matter originating from other farmed species is therefore important for the development of such multi-species farming systems. Here, a coupled stable isotope − fatty acid approach was used to characterize the assimilation of organic matter from shrimp (Penaeus stylirostris) farming by Holothuria scabra in an experimental culture system. H. scabra were reared in mesocosms on shrimp farming-originating sediment with and without additional food sources (maize and fish meals). Although fatty acid results did indicate that...
Tipo: Text
Palavras-chave: Fatty acids; Stable isotopes; Rotational co-culture; Shrimp-farming; Holothurid.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00624/73589/73023.pdf

Associacao de adubos verdes com milho e soja cultivados em solo de cerrados.
Provedor de dados: 14
Autores: SUHET, A. R.; BURLE, M. L.; PERES, J. R. R.
bitstream/item/107173/1/pesq-60.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Cultivo; Bandeirante; Mineirao; Pioneiro; Zornia latifolia; Capim rhodes; Planta leguminosa; Maize; Cultivation; Vulgaris; Stylosanthes guianensis var; Punciflora.; Adubação Verde; Amendoim; Andropogon Gayanus; Capim Gordura; Cerrado; Glycine Max; Gramínea; Melinis Minutiflora; Milho; Solo; Soja; Stylosanthes Macrocephala; Zea Mays.; Arachis pintoi; Paspalum; Green manures; Legumes; Mixed cropping; Varieties.; Soil; Soybeans.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549399

Association between microsatellites and resistance to Mal de Río Cuarto in maize by discriminant analysis
Provedor de dados: 85
Autores: Bonamico,NC; Balzarini,MG; Arroyo,AT; Ibañez,MA; Díaz,DG; Salerno,JC; Di Renzo,MA.
Resistance to Mal de Río Cuarto (MRC) disease in maize (Zea mays L.) is important in Argentina because the crop area involves a wide region where the disease is endemic. Molecular marker-assisted selection could be used as an additional selection tool to enhance precision of the genotype selection for resistance. It demands the identification of informative markers. Microsatellite (SSR) markers linked to gene(s) associated with resistance to MRC have been reported from previous QTL analyses. These analyses have been made on linkage maps derived from a relatively early mapping population. In advanced populations, where highly distinct genotypes are easily classified, discriminant analysis (DA) represents a complementary strategy to marker identification;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Microsatellite; Mal de Río Cuarto; Discriminant analysis.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000100006

Association of secondary traits with yield in maize F 1 's
Provedor de dados: 65
Autores: Nardino,Maicon; Souza,Velci Queiróz de; Baretta,Diego; Konflanz,Valmor Antonio; Carvalho,Ivan Ricardo; Follmann,Diego Nicolau; Caron,Braulio Otomar.
ABSTRACT: The objective was to identify phenotypic and genotypic associations, and cause-and-effect relations of secondary components on primary components to establish criteria in the indirect selection process for maize. Partial diallel crosses were conducted in Clevelândia. F1's were evaluated in five environments. For the purpose of increasing the yield of corn grain, breeders should seek to reduce the characters distance from the last node to the first branch of the tassel, tassel length and number of branches. The indirect selection for distance from the last node to the first branch of the tassel would be effective to increase the grain yield. The selection for smaller leaf angle, larger stem diameter and thousand grain weight are favorable for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Direct and indirect effects; Zea mays L.; Tassel characters.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500776

Atividade de glutationa S-transferase na metabolização de acetochlor, atrazine e oxyfluorfen em milho (Zea mays L.), sorgo (Sorghum bicolor L.) e trigo (Triticum aestivum L.) (Poaceae)
Provedor de dados: 3
Autores: Cataneo, Ana Catarina; UNESP; Chamma, Karina Luiz; UNESP; Ferreira, Leonardo César; UNESP; Déstro, Guilherme Fernando Gomes; UNESP; Carvalho, José Claudionir; UNESP; Novelli, Ethel Lourenzi Barbosa; UNESP.
Este experimento foi conduzido para avaliar a seletividade em plantas dos herbicidas acetochlor, atrazine e oxyfluorfen em relação à atividade da glutationa S-transferase (GST) em plantas de milho (Zea mays L.), sorgo (Sorghum bicolor L.) e trigo (Triticum aestivum L.) (Poaceae). A atividade da GST foi detectada às 24, 48 e 72 horas após as aplicações dos tratamentos. Os tratamentos do experimento consistiram de aplicação com água (controle), acetochlor (3 L.ha-1), atrazine (4 L.ha-1) e oxyfluorfen (1 L.ha-1). As maiores atividades de GST foram observadas na presença de acetochlor, principalmente às 48 horas após o tratamento. Esses aumentos foram 105, 148 e 118% em relação ao controle para milho, sorgo e trigo, respectivamente. É sugerido que a GST pode...
Palavras-chave: 2.00.00.00-6 Ciências Biológicas glutationa S-transferase; Atrazine; Acetochlor; Oxyfluorfen; Herbicidas; Seletividade 2.00.00.00-6 Ciências Biológicas.
Ano: 2002
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2366

Atrazine degradation patterns: the role of straw cover and herbicide application history
Provedor de dados: 63
Autores: Leal,Daniela Piaz Barbosa; Dick,Deborah Pinheiro; Stahl,Anna Meike; Köppchen,Stephan; Burauel,Peter.
ABSTRACT: In Brazil, atrazine (ATZ) is widely applied to maize (Zea mays L.) fields for weed control. The presence of ATZ and its metabolites in soil and water matrices has become a matter of some concern for governmental authorities as well as for society at large. This study evaluated the patterns of ATZ degradation (mineralization, extractable and non-extractable ATZ residues, and metabolite formation) in a Brazilian Typic Paleudult. Soil samples from a cultivated area under a no-tillage system with a history of ATZ application were incubated with 14C-ATZ in both the presence and absence of straw cover on the soil surface, and the evolved 14CO2 was determined by liquid scintillation. Samples from an area with native vegetation, adjacent to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atrazine mineralization; Sorption; Metabolites; No-tillage.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100063

Atrazine in a corn cultivated area and its relation with the landscape position
Provedor de dados: 64
Autores: Aquino,Regimeire Freitas; Lima,José Maria de; Magalhães,Ciro Augusto de Souza; Silva,Bruno Montoani; Carvalho,Renato Fráguas de; Guilherme,Luiz Roberto Guimarães.
Atrazine is still being used in no-till corn production in Brazil. This herbicide can be moved by overland flow and leached in the soil profile. In both ways, it can pollute water, either by reaching the groundwater or lakes and streams close to the crop field. This study evaluated the presence of atrazine in a dystrophic Yellow-Red Argisol and a dystrophic Melanic Gleisol in a corn field, where atrazine has been applied for 11 years. Overland flow was the main process of atrazine transport on hillslope and leaching was the most important process in the floodplain. Frequency and location of atrazine application in the landscape define this herbicide contamination process.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Overland flow; Maize.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500001

Attitude of farmers in the central region on hybrid corn cultivation
Provedor de dados: 106
Autores: Lampan  Khankasigum; Wattanaporn  Meesakuntavorn.
8 tables
Palavras-chave: Corn; Maize; Hybrids; Seed; Production; Farmer attitude; ข้าวโพด; ลูกผสม; ทัศนคติ; เกษตรกร; เมล็ดพันธุ์; การเขตกรรม; การปลูก.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4274

Attitudes and acceptance of South African urban consumers towards genetically modified white maize
Provedor de dados: 31
Autores: Vermeulen,   Hester; Kirsten,   Johann F.; Doyer,   Ockert T.; Schonfeldt,   H.C.
The introduction of genetically modified (GM) food products to food markets around the world, has led to considerable controversy. In many cases consumer attitudes and perceptions of GM food products were revealed as fears, concern for, and avoidance of the new technology. The importance of GM foods in South Africa is increasing, even though the GM Food debate lags behind many other (often more developed) parts of the world. This paper investigates the knowledge, attitudes and acceptance of urban South African white-grain maize consumers regarding GM maize. Conjoint- and cluster analysis were used to develop clusters/market segments among the urban consumers of white maize. A range of additional questions was used to develop profiles of the identified...
Tipo: Journal Article
Palavras-chave: Consumer/Household Economics.
Ano: 2005
URL: http://purl.umn.edu/31714

Aumento de Ingestão de Calorias Relacionada ao Aumento de Renda no Norte d e Moçambique
Provedor de dados: 31
Autores: Rose,   Donald; Strasberg,   Paul J.; Jeje,   Jose Jaime; Tschirley,   David L.
Resultados das investigações do Departamento de Análise de Políticas MAP-Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Food consumption; Food Consumption/Nutrition/Food Safety; Q18.
Ano: 1999
URL: http://purl.umn.edu/55212

Auswirkungen verschiedener Ackerkulturen auf die Laufkäfer (Coleoptera, Carabidae)
Provedor de dados: 21
Autores: Luka, Henryk; Pfiffner, Lukas; Niggli, Urs.
Carabid populations (species diversity and abundance) in different crops were investigated during the period from April to July 1993 to 1995. The study was carried out on two farms in North-Western Switzerland. Nine fields with winter cereals (4x wheat, 2x spelt, 2x barley, lx rye), three rape fields, five spring cultures (3x maize, lx soybeans, lx potatoes) and an arable meadow were studied. In winter cereals, more carabid species were found than in spring cultures. In barley, we recorded fewer carabid species and individuals, larger numbers of hygrophilaus carabids and a more even population structure than in the other cereals. In rape, we recorded the highest numbers of carabid species and individuals, and very large numbers of Amara similata and A...
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Biodiversity and ecosystem services.
Ano: 2000
URL: http://orgprints.org/20212/1/38_Lukaetal_2000_Carab_Kultureinfluss.pdf

Automatic identification of crop and weed species with chlorophyll fluorescence induction curves
Provedor de dados: 21
Autores: Tyystjärvi, Esa; Nørremark, Michael; Mattila, Heta; Keränen, Mika; Hakala-Yatkin, Marja; Ottosen, Carl-Otto; Rosenqvist, Eva.
Automatic identification of crop and weed species is  required for many precision farming practices. The use of chlorophyll fluorescence fingerprinting for identification   of maize and barley among six weed species was tested. The plants were grown in outdoor pots and the fluorescence measurements were done in variable natural conditions.   The measurement protocol consisted of 1 s of shading followed by two short pulses of strong light photosynthetic photon flux density 1700 lmol m-2 s-1) with 0.2 s of darkness in between. Both illumination pulses caused the fluorescence yield to increase by 30–60% and to display a rapid fluorescence transient resembling transients obtained after long dark incubation. A neural network classifier, working on 17 features...
Tipo: Journal paper
Palavras-chave: Weed management.
Ano: 2011
URL: http://orgprints.org/20654/4/20654.pdf

Autumn Maize Intercropped with Tropical Forages: Crop Residues, Nutrient Cycling, Subsequent Soybean and Soil Quality
Provedor de dados: 90
Autores: Pereira,Francisco Cézar Belchor Lages; Mello,Luiz Malcolm Mano de; Pariz,Cristiano Magalhães; Mendonça,Veridiana Zocoler de; Yano,Élcio Hiroyoshi; Miranda,Elka Elice Vasco de; Crusciol,Carlos Alexandre Costa.
ABSTRACT Autumn maize intercropped with tropical forages can raise the amount of crop residues and improve nutrient cycling, favoring subsequent soybean crop. The objective of this study was to evaluate the effect of forms of implementation of intercropping of irrigated autumn maize with tropical forages on yield, decomposition, nutrient accumulation and release, and on the ratio of lignin/total N of forage residues, yield components, and grain yield of subsequent soybean, and on soil physical and chemical properties, under no-tillage in lowland Cerrado. The experiment was arranged in randomized blocks in a factorial (4 × 3 + 1) design with one control and four replications. The treatments consisted of four forages: Palisade grass, Congo grass, and two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lowland Cerrado; No-tillage system; Crop residues; Panicum; Urochloa.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100518

Availability of phosphorus for maize in crop-livestock integration system
Provedor de dados: 124
Autores: Galetto,Shivelly Los; Fonseca,Adriel Ferreira da; Harkatin,Silvano; Auler,André Carlos; Carvalho,Igor Quirrenbach de.
The objectives of this study were to assess the concentrations of available phosphorus (P) extracted using the Mehlich-1 (M1), ion exchange resin (IER) and modified Morgan (MM) methods after 36 months of experimentation with the application of phosphates in a crop-livestock integration system (CLIS). Moreover, this study aimed to assess which extraction method provides the best correlation of P concentrations with the maize crop attributes. The treatments consisted of applying annual doses of P2O5 on the soil surface of the total area during the sowing of winter forage crops in the form of triple superphosphate (TSP), rock phosphate (RP) or magnesium thermophosphate (MTP). After 36 months of experimentation, soil samples were collected from the 0-5, 5-10,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Mehlich-1; Ion exchange resin; Modified Morgan.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500011

Availability of soil water and water use by corn, sorghum, soybean and mungbeans
Provedor de dados: 106
Autores: Seri Sukkij; Prasong Banthao; Somporn Isranurak.
10 tables
Palavras-chave: Corn; Maize; Sorghum; Soybeans; Mungbeans; Soil water; Water use; Precipitation; Yields; ข้าวโพด; ข้าวฟ่าง; น้ำในดิน; การใช้น้ำ; ถั่วเหลือง; ถั่วเขียว.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3928

Available content, surface runoff and leaching of phosphorus forms in a typic hapludalf treated with organic and mineral nutrient sources
Provedor de dados: 90
Autores: Lourenzi,Cledimar Rogério; Ceretta,Carlos Alberto; Cerini,Jackson Berticelli; Ferreira,Paulo Ademar Avelar; Lorensini,Felipe; Girotto,Eduardo; Tiecher,Tadeu Luis; Schapanski,Dênis Eduardo; Brunetto,Gustavo.
The application of animal manure to soil can increase phosphorus availability to plants and enhance transfer of the nutrient solution drained from the soil surface or leached into the soil profile. The aim of this study was to evaluate the effect of successive applications of organic and mineral nutrient sources on the available content, surface runoff and leaching of P forms in a Typic Hapludalf in no-tillage systems. Experiment 1 was set up in 2004 in the experimental area of UFSM, in Santa Maria (RS, Brazil). The treatments consisted of: control (without nutrient application) and application of pig slurry (PS), pig deep-litter (PL), cattle slurry (CS), and mineral fertilizers (NPK). The rates were determined to meet the N crop requirements of no-tillage...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic waste; Nutrient release; Environmental contamination; No-tillage system.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000200019

Avaliacao da cultura do milho (Zea mays L) sob diferentes sistemas de irrigacao e preparo do solo em varzeas de Roraima.
Provedor de dados: 14
Autores: MEDEIROS, R. D. de; ARAUJO, W. F. de.
Tipo: Folhetos
Palavras-chave: Brasil; Roraima; Maize; Irrigação; Milho; Solo; Brazil; Irrigation; Soil.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/688063

Avaliacao da eficiencia de fosfatos de rocha parcialmente acidulados e tratados termicamente.
Provedor de dados: 14
Autores: PEREIRA, J. R.; FARIA, C. M. B. de.
Avalia a eficiencia de diferentes fosfatos de rocha com acido sulfurico e termicamente em Latossolo Vermelho Amarelo da regiao do medio Sao Francisco no incremento da produtividade da cultura do milho sob condicao de irrigacao.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Variety; Soils; Fertilization; Phosphate; Maize; Milho; Fertilidade; Fosfato; Variedade; Solo; Zea Mays; Corn.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132823

Avaliação de cultivares de milho crioulo em sistema de baixo nível tecnológico - DOI: 10.4025/actasciagron.v32i2.430
Provedor de dados: 1
Autores: Pipolo, Valéria Carpentieri; UEL - Londrina; Souza, Agnelo de; UEL - Londrina; Silva, Daiana Alves da; UEL - Londrina; Barreto, Thales Pereira; UEL - Londrina; Garbuglio, Deoclécio Domingos; IAPAR; Ferreira, Josué Maldonado; UEL - Londrina.
Com o advento da agricultura moderna, as sementes crioulas foram, em geral, substituídas por cultivares híbridos, com elevado potencial produtivo, porém mais dependentes de insumos e tecnologias intensivas. O objetivo deste trabalho foi avaliar variedades de milho crioulo, de forma a identificar materiais mais produtivos e que propiciem o processo sustentável no qual os próprios grãos possam ser utilizados como semente. Foram avaliadas 15 variedades de milho crioulo, tendo como testemunhas as cultivares comerciais BR 106 e IPR 114. Os experimentos foram conduzidos em Arapongas e Imbaú, Estado do Paraná, durante o ano agrícola de 2004/2005, sem a utilização de insumos externos. O delineamento utilizado foi o de blocos casualizados com quatro repetições. As...
Palavras-chave: Zea mays L.; Variedades locais; Melhoramento Zea mays L.; Landraces; Breeding.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/430

Avaliação de cultivares de milho e de sorgo para silagem.
Provedor de dados: 14
Autores: VIANA, A. C.; MIRANDA, J. E. C.; CRUZ, J. C.; VALENTE, J. de O.; FERREIRA, J. J.
bitstream/item/30884/1/Pesq.And.-21.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Variedades; Maize; Savanna; Production.; Cerrado; Milho; Produção; Silagem; Sorghum Bicolor; Sorgo; Zea Mays.; Silage; Varieties.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478860

Avaliacao de cultivares de milho em duas epocas de semeadura, no municipio de Querencia-MT, ano agricola 1997/98.
Provedor de dados: 14
Autores: MUNIZ, J. A.; VIEIRA, C. P.; BARBOSA, D. J.; LAMAS, F. M.
bitstream/item/39456/1/COT35-98.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Comportamento; Brasil; Mato Grosso; Querencia; Maize; Behaviour.; Cerrado; Época de Semeadura; Milho; Zea Mays.; Brazil; Sowing date.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/241136

Avaliação de cultivares de milho na Transamazônica - Pará.
Provedor de dados: 14
Autores: SOUZA, F. R. S. de; MOTA, M. G. da C.; BARRIGA, R. H. M. P.; OLIVEIRA, R. P. de.
bitstream/item/63090/1/Altamira-CirTec6.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cultivar; Avaliação; Transamazônica; Pará; Brasil; Maize; Variety; Yield; Valuation.; Milho; Produtividade.; Amazonia.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383440

Avaliação de cultivares de milho no município de Paragominas - Pará.
Provedor de dados: 14
Autores: SOUZA, F. R. S. de; GAMA, E. E. G. e; OLIVEIRA, M. R. C. de; CORREA, J. R. V.; EL-HUSNY, J. C.
bitstream/item/57743/1/CPATU-ComTec94.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cultivo; Paragominas; Pará; Maize; Cultivation; Production; Yield; Environmental conditions.; Condição Ambiental; Milho; Produtividade; Produção.; Amazonia.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376249

Avaliação de dano e controle da cigarrinha-das-pastagens em plantas de milho com diferentes idades.
Provedor de dados: 14
Autores: SANTOS, J. P.; CRUZ, I.; BOTELHO, W.
bitstream/item/48322/1/Pesq.And.-2.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pragas; Controle; Maize; Pest; Control; Damage.; Cigarrinha das Pastagens; Dano; Milho; Zea Mays.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476288

Avaliação de genotipos de milho em várzea do Amapá.
Provedor de dados: 14
Autores: BEZERRA, V. S.
O objetivo deste trabalho e avaliar genotipos de milho em várzea. A deposição natural de minerais e humus carreados pelas mares neste ecossistema, acentua o seu potencial para a exploração desta gramínea.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Amapá; Maize; Genotypes.; Genótipo; Milho; Várzea; Zea Mays.; Brazil.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/341808

Avaliação de hibridos intervarietais de milho.
Provedor de dados: 14
Autores: SAMPAIO, N. F.
bitstream/item/56628/1/PA-15420001.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Melhoramento genetico; Brasil; Rondonia; Maize.; Milho Hibrido; Zea Mays.; Brazil; Genetic improvement.; Corn.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/698525

Avaliação de qualidade do solo no sistema ILPF (URTP Embrapa Milho e Sorgo).
Provedor de dados: 14
Autores: ALBUQUERQUE FILHO, M. R. de; VIANA, J. H. M.; CLEMENTE, E. de P.
RESUMO - Os níveis de resistência à penetração do solo e a qualidade da estrutura na camada superficial foram avaliados na Unidade de Referência em sistema ILPF e no cerrado adjacente, na Fazenda Experimental da Embrapa Milho e Sorgo, em Sete Lagoas-MG. O trabalho foi realizado utilizando-se um penetrógrafo eletrônico para avaliar a resistência do solo à penetração até 60 cm de profundidade e o DRES - Diagnóstico Rápido da Estrutura do Solo para a camada de 0 a 20 cm de profundidade. Não houve diferença estatística entre a resistência à penetração no cerrado e no sistema ILPF. A camada de maior resistência no ILPF se localiza mais próxima à superfície e com densidade um pouco mais elevada, mas abaixo do limite de impedimento ao crescimento de raízes e...
Tipo: Folhetos
Palavras-chave: Resistência do solo; Penetração; DRES; Penetrometria; Soil resistance; Penetrometry; Manejo do Solo; Sistema de Cultivo.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1149570

Avaliação de sistema de produção alternativo de milho em monocultivo.
Provedor de dados: 14
Autores: OLIVEIRA, J. N. S.; SAMPAIO, N. F.
O sistema de produção preconizado apresenta sérias limitações à obtenção de ganhos de produtividade da cultura, mesmo nas áreas de solos mais férteis, por apresentar poucas alternativas tecnológicas. Face impirismo que lhe é peculiar, o cultivo do milho em Porto Velho constitui-se num desafio ao produtor e uma atividade de alto risco. A tecnologia disponível pela pesquisa poderá melhorar o desempenho técnico e econômico da cultura, imprimindo algumas mudanças ao sistema proposto para as demais áreas do Estado. Com a finalidade de viabilizar a produção de milho em Porto Velho, algumas inferências foram feitas ao modelo preconizado, buscando novas opções de escolha ao produtor e menor margem de riscos econômicos.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Rondonia; Maize.; Milho; Sistema de Produção; Zea Mays.; Brazil; Corn.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/698538

Avaliação do comportamento de híbridos comerciais de milho nas regiões nordeste e sudeste do Estado do Pará.
Provedor de dados: 14
Autores: SOUZA, F. R. S. de; CORREA, L. A.; GAMA, E. E. G. e; PEREIRA, C. A.; EL-HUSNY, J. C.
bitstream/item/57622/1/CPATU-PA214.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Paragominas; Pará; Brasil; Maize; Production; Variety; Yield; Environmental conditions.; Condição Ambiental; Milho; Produtividade; Produção; Variedade.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376243

Avaliação do desempenho dos novos instrumentos de política de garantia de preços agrícolas de 2004 a 2007
Provedor de dados: 31
Autores: Bacha,   Carlos Jose Caetano; Caldarelli,   Carlos Eduardo.
O objetivo deste artigo é avaliar o desempenho dos instrumentos da Política de Garantia de Preços Agrícolas (PGPA), criados a partir de 2004, em termos de produtos e regiões. Os contratos de opção privada que começaram a ser criados a partir de 2004 possuem característica de transferir à iniciativa privada a responsabilidade de abastecer áreas previamente determinadas. O PEPRO - Prêmio para Escoamento em Opção Privada, o PROP - Prêmio de Risco para Opção Privada e o PESOJA – Prêmio de Risco para a Soja, constituem os novos instrumentos para operacionalização da PGPA. Esse trabalho avaliou o dinamismo destes em comparação com os já existentes. Observou-se que os novos instrumentos, assim como os já operantes, se mostraram concentrados por cultura e por...
Tipo: Conference Paper or Presentation
Palavras-chave: Comercialização; Sustentação de preços; Política de garantia de preços agrícolas; Commercialization; Support price; Guarantee of minimal price politics; Agricultural and Food Policy.
Ano: 2008
URL: http://purl.umn.edu/108080

Avaliação do efeito materno na herança da tolerância ao alumínio em milho
Provedor de dados: 3
Autores: Prioli, Alberto José; UEM; Schneider, Tânia Aparecida Amaducci; NUPELIA-UEM; Hoshino, Andrea Akemi; NUPELIA-UEM; Bravo, Juliana Pereira; UEM; Boni, Talge Aiex; NUPELIA-UEM; Prioli, Sonia Maria Alves Pinto; NUPELIA-UEM; Munhoz, Roxelle Ethienne Ferreira; UEM.
Os cerrados ocupam quase um quarto do território brasileiro e têm solos ácidos com alta saturação de alumínio, que reduz a produtividade de plantas não adaptadas, pois limita o crescimento das raízes. O uso de genótipos tolerantes ao alumínio, em combinação com calagem, é uma estratégia promissora para a exploração agrícola dos cerrados. O conhecimento dos mecanismos de herança da tolerância ao alumínio contribuirá para a obtenção de genótipos tolerantes e produtivos. O objetivo deste trabalho foi determinar se há efeito materno na resposta ao alumínio em cruzamentos recíprocos de linhagens endogâmicas de milho. Foram utilizados seis pares de cruzamentos recíprocos entre duas linhagens tolerantes e três sensíveis. Os cruzamentos recíprocos mostraram taxas...
Palavras-chave: 2.00.00.00-6 Ciências Biológicas tolerância ao alumínio; Milho; Efeito materno 2.00.00.00-6 Ciências Biológicas.
Ano: 2000
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2816

Avaliação do malathion po no controle de pragas do milho armazenado em espigas com palha.
Provedor de dados: 14
Autores: SANTOS, J. P.; CRUZ, I.; FONTES, R. A.; FERRARI, R. A.
bitstream/item/30877/1/ct-2.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Pragas; Maize; Pest.; Armazenamento; Controle Químico; Milho; Zea Mays.; Chemical control; Storage.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/486585

Avaliacao do valor nutritivo de silagens de girassol de milho e de suas misturas.
Provedor de dados: 14
Autores: FERNANDES, F. D.; VELOSO, R. F.; AMABILE, R. F.; GOMES, A. C.; FERNANDES, F. B.
bitstream/CPAC-2009/24354/1/p2002_08.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: PABOV200; Supplementary feeding; Sunflowers; Maize.; Composição Química; Digestibilidade; Girassol; Milho; Nutrição Animal; Silagem; Valor Nutritivo.; Suplemento Alimentar; Animal nutrition; Chemical composition; Digestibility; Nutritive value; Silage.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567659

Avaliação e caracterização de variedades locais de milho para eficiência na absorção e na utilização de fósforo.
Provedor de dados: 14
Autores: MACHADO, C. T. de T.; MACHADO, A. T.; FURLANI, A. M. C.; GUERRA, J. G. M.
RESUMO: Experimentos de campo e sob condições controladas foram conduzidos para estudar a eficiência em fósforo (P) de variedades locais de milho. Em casa de vegetação, dezoito genótipos foram cultivados em solo, sob duas doses de P, com o objetivo de verificar diferenças quanto à produção de matéria seca e utilização de P. Detectou-se variabilidade entre variedades locais para utilização de P e respostas diferenciadas a doses aplicadas. Posteriormente, índices de eficiência ao P foram estimados em dez variedades, em três concentrações de P, em solução nutritiva, e em uma dose ótima de P em campo. Confirmou-se o comportamento diferenciado das variedades para produção de matéria seca e de grãos, conteúdo de P e índices de eficiência. Na última etapa, foram...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Nutrição fosfatada; Parâmetro cinético; Maize; Phosphorus nutrition; Kinetics parameters; Enzimatic activity.; Atividade Enzimática; Fósforo; Milho; Melhoramento Vegetal; Variedade; Zea Mays.; Genetic variation; Plant breeding; Varieties.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569605

Avaliação, empregando modelagem, de estratégias de manejo para incrementar a produtividade de milho na segunda safra.
Provedor de dados: 14
Autores: MAGALHÃES, B. G.; ANDRADE, C. de L. T. de; SILVA, P. P. G. da; LOPES, D. de C.; MELO, B. F. de; GARCIA Y GARCIA, A.; GONTIJO NETO, M. M.
O cultivo de milho na safrinha em condições de sequeiro pode ser afetado pelas incertezas climáticas. Algumas alternativas para atenuar esses efeitos são: a manutenção de palhada na superfície do solo e a utilização de plantas com sistema radicular mais profundo. O estudo teve como objetivo avaliar, empregando simulação, o efeito de diferentes combinações de palhada na superfície do solo, com diferentes profundidades de sistema radicular, e de doses de adubação nitrogenada na produtividade do milho safrinha em Rio Verde-GO. Utilizou-se a ferramenta de análise sazonal do modelo CSM-CERES-Maize para simular cenários de combinação entre as profundidades de sistema radicular (0,30; 0,50 e 0,70 m) e as quantidades de palhada de soja sobre na superfície do solo...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Modelagem; Safrinha; Zea mays; Plantio direto; Sistema radicular.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1063414

Az élelmezés-, energia- és környezetbiztonság összefüggései
Provedor de dados: 31
Autores: Popp,   Jozsef; Potori,   Norbert.
A 2006/2007. gazdasági évtől a legtöbb mezőgazdasági termék ára gyors emelkedésnek indult és rekordokat döntött. A FAO élelmiszerár-indexe 2006 januárja és 2008 januárja között több mint 60 százalékkal emelkedett. Árkilengések persze korábban is előfordultak, de a legutóbbi ársokkot azonban számos tényező együttesen idézte elő. Ezek felsorolásánál első helyen említhető a világ gabona- és olajosmagkészleteinek megcsappanása: a Föld élelmiszermérlege évtizedek óta nem mutatott ilyen szűkös tartalékokat. Ehhez egyértelműen hozzájárult a rövidlátó gazdaságpolitika is. Ugyanakkor a média hajlamos az élelmiszerárak ugrásszerű növekedését inkább a feltörekvő gazdaságok (pl. Kína és India) élelmiszer-fogyasztási szerkezete átalakulásának és a bioüzemanyag-gyártás...
Tipo: Journal Article
Palavras-chave: Élelmiszerárak; Fogyasztási struktúra; Bioüzemanyag-gyártás; GM növények; Agrárpolitika; Food prices; Structure of consumption; Manufacture of bio-fuels; GM crops; Agricultural politics; Agricultural and Food Policy; Environmental Economics and Policy; Land Economics/Use.
Ano: 2008
URL: http://purl.umn.edu/58897

AZ ÖNTÖZÉS SZEREPE, JELENTŐSÉGE
Provedor de dados: 31
Autores: Helyes,   Lajos.
Az öntözés egyik alapvető célja, hogy javítsa az egyre növekvő népesség élel-miszerrel való ellátását. A világon jelenleg a szántóterület 17%-át öntözik, vi-szont ez a felület adja az évenként betakarítható össztermés valamivel több mint 40%-át. Hazánkban a vízjogi engedéllyel rendelkező öntözésre berendezett terü-letünk 210 ezer hektár, ami a szántóterület közel 5%-a, de a ténylegesen öntözött terület évjárattól függően ennek kb. a fele. Az Európai Unióban átlagosan a szántóterület 13,5%-a tekinthető öntözöttnek. Az elkövetkező évek alapvető fejlesztési feladata a már meglévő öntözőrend-szerek felújítása és bővítése. A szántóföldi növények közül a kukorica, a napra-forgó, a cukorrépa és a burgonya öntözése indokolt. Az öntözött területek ará-nyának...
Tipo: Journal Article
Palavras-chave: Klímatikus változások; Termésveszteség megelőzés; Öntözési háttér rekonstrukció szükségessége - climate change; Prevention of yield loss; Necessity of reconstruction of irrigation equipments; Crop Production/Industries; Environmental Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/54337

Azospirillum lipoferum and nitrogen fertilization effect on chlorophyll content, nutrients uptake and biometric properties of Zea mays L.
Provedor de dados: 115
Autores: Davaran-Hagh,Elnaz; Mirshekari,Bahram; Reza-Ardakani,Mohammad; Farahvash,Farhad; Rejali,Farhad.
Integrated nutrient management is a major agronomic practice which brings together all methods to support plants nutritional requirement. However, the interaction of these methods together is very complex and needs to be studied in different climatic conditions. So, the effect of nitrogen fertilizer and Azospirillum lipoferum inoculation on maize (Zea mays L.) growth, yield and nutrients uptake was determined in this study. The hypothesis was that the bacterial inoculation decreases the need for N fertilizer application without reducing plant yield. Therefore, we carried out a factorial experiment in a randomized complete block design with three replications. Nitrogen at 0, 25, 50, 75 and 100 % concentrations of the recommended dose, i.e. 150 kg N ha-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofertilizer; Iron; Nitrogen; Phosphorus; Zinc.
Ano: 2015
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000800006

Baby corn, green ear, and grain yield of corn cultivars
Provedor de dados: 75
Autores: Almeida,Itala Paula de C.; Silva,Paulo Sérgio L. e; Negreiros,Maria Z. de; Barbosa,Zenaide.
Most maize cultivars have been developed for grain production. Because superior cultivars may differ in their exploiting purposes, interest has been demonstrated for the evaluation of corn cultivars with regard to their baby corn, green ear, and grain yields production ability. In the present work ten corn cultivars (AG 405, AG 1051, AG 2060, AG 6690, AG 7575, AG 8080, DKB 333 B, DKB 435, DKB 350 and DKB 747) were evaluated in the yield of baby corn, green ears and dry grains. Two experiments were carried out in the same season, in neighboring areas and managed in a similar way, in Mossoró, Rio Grande do Norte State, Brazil, in a randomized blocks design with five replicates. Baby corn yield (178,571 plants ha-1) was evaluated in one of the experiments....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Green corn.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362005000400020

Baby corn improvement at Chiang Mai Field Crops Research Center
Provedor de dados: 106
Autores: Prawit Puddhanon; Penkae Nattribhop; Sakol Petchmanee; Vichit Kajornmalee.
1 ill., 3 tables
Palavras-chave: Corn; Maize; Baby corn; Breeding; ข้าวโพด; ข้าวโพดฝักอ่อน; การพัฒนาพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4241

Baby corn regional yield trial in 1990
Provedor de dados: 106
Autores: Prawit Puddhanon; Sakol Petchmanee; Penkae Nattribhop; Suvit Punsurintr; Vichit Kajornmalee; Sukapong Vayuparp; Artasit Boontum.
1 ill., 8 tables
Palavras-chave: Corn; Maize; Baby corn; Yield trial; ข้าวโพด; ข้าวโพดฝักอ่อน; การทดสอบผลผลิต.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4281

Bacillus subtilis improves maize tolerance to salinity
Provedor de dados: 65
Autores: Ferreira,Nathalia Calhabeu; Mazzuchelli,Rita de Cassia Lima; Pacheco,Ana Claudia; Araujo,Fabio Fernando de; Antunes,Jadson Emanuel Lopes; Araujo,Ademir Sergio Ferreira de.
ABSTRACT: The aim of this study was to evaluate the biochemical responses of maize, under saline stress, inoculated with Bacillus subtilis. Four levels of salinity were assessed: 0mM, 50mM, 100mM, and 200mM of sodium chloride (NaCl). Saline conditions influenced negatively maize growth. However, the inoculation of B. subtilis improved the plant growth at highest level of NaCl. Chlorophyll content decreased while proline increased in inoculated plants submitted to highest salt levels. Also, B. subtilis increased the relative water content in leaves. B. subtilis improves the plant growth under salinity and ameliorates the biochemical damages in maize.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; PGPB; Biochemical responses; Enzymes.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000800202

Bacteria in combination with fertilizers promote root and shoot growth of maize in saline-sodic soil
Provedor de dados: 58
Autores: Zafar-ul-Hye,Muhammad; Farooq,Hafiz Muhammad; Hussain,Mubshar.
Salinity is the leading abiotic stress hampering maize (Zea maysL.) growth throughout the world, especially in Pakistan. During salinity stress, the endogenous ethylene level in plants increases, which retards proper root growth and consequent shoot growth of the plants. However, certain bacteria contain the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase, which converts 1-aminocyclopropane-1-carboxylic acid (an immediate precursor of ethylene biosynthesis in higher plants) into ammonia and α-ketobutyrate instead of ethylene. In the present study, two Pseudomonas bacterial strains containing ACC-deaminase were tested separately and in combinations with mineral fertilizers to determine their potential to minimize/undo the effects of salinity on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; ACC-deaminase; Rhizobacteria; Salinity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100097

Bacterial diversity in the rhizosphere of a transgenic versus a conventional maize (Zea mays)
Provedor de dados: 85
Autores: Vital-López,L; Cruz-Hernández,MA; Fernández-Dávila,S; Mendoza-Herrera,A.
Genetically modified crops could cause negative effects on bacterial communities. In this study, we compared the bacterial community structure of two maize cultivars to determine whether the transgenic cultivar exerts a negative effect on bacterial communities inhabiting the rhizosphere. Cultivars included the genetically modified maize (Zea mays), with the pat-gene conferring resistance to the herbicide glufosinate (synonym: L-phosphinothricin), and the hybrid, conventional maize. Metagenomic DNA was extracted from the rhizosphere of plants grown in a greenhouse. Single-strand conformation polymorphism, based on polymerase chain reaction amplifying a partial subunit rRNA gene was used to characterize and generate genetic profiles that corresponded to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Glufosinate; Metagenomic DNA; Rhizosphere; Single-strand conformation polymorphism.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000200006

Bacterial leaf blight of corn in Thailand
Provedor de dados: 106
Autores: Vanida Titatarn; Somkiat Titatarn.
Palavras-chave: Corn; Maize; Pathology; Bacterial leaf blight; Symptoms; Pseudomonas alboprecipitans; ข้าวโพด; โรคพืช; โรคใบไหม้.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4098

Balanço de N em rotação de culturas sob plantio direto em Dourados, MS.
Provedor de dados: 14
Autores: ALVES, B. J. R.; ZOTARELLI, L.; ARAÚJO, E. S.; FERNANDES, F. M.; HECKLER, J. C.; MEDEIROS, A. F. A.; BODDEY, R. M.; URQUIAGA, S.
Matéria seca e N total. Quantificação da FBN eficiência do uso de N fertilizante. Balanço de N para as culturas. Resultados e discussão. Quantificação da FBN para a cultura da soja. Eficiência da fertilização. Balança de N para as culturas. O objetivo do presente estudo foi avaliar o impacto da fixação biológica de nitrogênio (FBN) na cultura da soja e a eficiência do uso de fertilizantes nitrogenados pelas culturas do milho e algodão sobre o balanço de N dos solo. O experimento foi realizando em Latossolo Vermelho distroférrico, na área experimental da Embrapa agropecuária oeste, em dourados, MS. Todas as culturas foram conduzidas em uma área onde se iniciou o plantio direto. No primeiro ano , as culturas do milho e algodão receberam 115kg N há-1 ,...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Balanço de nitrogênio; Fixação biológica de nitrogênio; FBN; Zero tillage; Direct sowing; Rotational cropping; Biological nitrogen fixation; BNF; Soybean; Maize.; Algodão; Milho; Plantio Direto; Rotação de Cultura; Soja.; Cotton; Nitrogen balance.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/626863

Balanço energético de um sistema integrado lavoura-pecuária no cerrado.
Provedor de dados: 14
Autores: SOARES, L. H. de B.; MUNIZ, L. C.; FIGUEIREDO, R. S.; ALVES, B. J. R.; BODDEY, R. M.; URQUIAGA, S.; MADARI, B. E.; MACHADO, P. L. O. de A.
O presente trabalho teve como objetivo avaliar um sistema integrado lavoura-pecuária sob o ponto de vista dos fluxos globais de energia. Em uma área experimental da Fazenda Capivara, localizada na Embrapa Arroz e Feijão, foi realizada uma avaliação econômica que serviu de base para esta primeira análise energética, aqui apresentada, de uma situação real de integração na região do Cerrado Brasileiro. O balanço energético de um sistema de produção, quando contabiliza em detalhes todos os componentes deste sistema sob a ótica de entradas e saídas energéticas, é um dos indicativos mais precisos da sustentabilidade da atividade agropecuária. Os resultados demonstram que a atividade agrícola demanda a maior parte do investimento energético do sistema. De um...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Lavoura-pecuária; Balanço energético.; Cerrado; Pratica Cultural; Sistema de Produção.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/622542

BARRIERS FOR DEVELOPMENT IN ZAMBIAN SMALL- AND MEDIUM-SIZE FARMS: EVIDENCE FROM MICRO-DATA
Provedor de dados: 31
Autores: Kimhi,   Ayal; Chiwele,   Dennis K.
The objective of this paper is to identify factors which limit the ability of Zambian farmers to increase Maize productivity and/or diversify their crop mix. Both may enable wealth accumulation, investments, and further expansion. Specifically, we link variations in agricultural decisions, practices, and outcomes, to variations in the tightness of the different constraints. We model crop production decisions as having recursive structure. Initially, farmers decide on land allocation among the different crops, based on their information set at planting time. Then, as new information (weather, market conditions) is revealed, farmers can change output by influencing the yield. This recursive structure enables to separate the effects of the constraints on the...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Diversification; Maize Productivity; Recursive Decisions; Two-stage Estimation; Censored Dependent Variables; Community/Rural/Urban Development; International Development; Resource /Energy Economics and Policy; O1; Q1.
Ano: 2000
URL: http://purl.umn.edu/21877

Bayesian analysis of the genetic structure of a Brazilian popcorn germplasm using data from simple sequence repeats (SSR)
Provedor de dados: 117
Autores: Saavedra,Javier; Silva,Tereza Aparecida; Mora,Freddy; Scapim,Carlos Alberto.
Several studies have confirmed that popcorn (Zea mays L. var. everta) has a narrow genetic basis, which affects the quality of breeding programs. In this study, we present a genetic characterization of 420 individuals representing 28 popcorn populations from Brazilian germplasm banks. All individuals were genotyped using 11 microsatellite markers from the Maize Genetics and Genomics Database. A Bayesian clustering approach via Monte Carlo Markov chains was performed to examine the genetic differentiation (Fst values) among different clusters. The results indicate the existence of three distinct and strongly differentiated genetic groups (K = 3). Moreover, the Fst values (calculated among clusters) were significantly different according to Bayesian credible...
Tipo: Journal article
Palavras-chave: Genetic differentiation; Microsatellite markers; Bayesian clustering; Monte Carlo Markov chains.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000200003

Beikrautsamenvorrat im Vergleich reduzierter und konventioneller Bodenbearbeitung unter Biobedingungen
Provedor de dados: 21
Autores: Geißler, M.; Armengot, Laura; Mäder, Paul; Krauss, Maike.
Armengot L, Berner A, Blanco-Moreno J, Mäder P &amp; Sans FX (2014) Long-term feasibility of reduced tillage in organic farming. Agron Sustain Dev 35(1): 339-346. Cooper J et al. (2016) Shallow non-inversion tillage in organic farming maintains crop yields and increases soil C stocks: a meta-analysis. Agron Sustain Dev 36: 1-20. Gruber S &amp; Claupein W (2009) Effect of tillage intensity on weed infestation in organic farming. Soil and Tillage Research 105(1): 104-111.  Montgomery DR (2007) Dirt: The Erosion of Civilizations. University of California Press, California. Moonen AC &amp; Barberi P (2004) Size and composition of the weed seedbank after 7 years of different cover-crop-maize management systems. Weed Research 44(3): 163-177.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil tillage Crop health; Quality; Protection Weed management.
Ano: 2017
URL: http://orgprints.org/31576/1/Beikrautsamenvorrat%20im%20Vergleich%20reduzierter%20und.pdf

Bekämpfungsstrategien für pflanzenparasitäre Nematoden im ökologischen Landbau
Provedor de dados: 21
Autores: Hallmann, Johannes; Klinger, Sonja; Rau, Florian.
Plant parasitic nematodes are an increasing threat to organic farming in Germany. Especially taxa with broad host spectra and high multiplication rates such as Meloidogyne hapla and Pratylenchus spp. can cause severe damage up to total loss of the crop. The control of these nematodes is extremely difficult. Resistant cultivars are not available and only few non-host crops are known. Weed control is another important issue as most weeds are excellent hosts. In 2003 and 2004 two on-farm trials aimed at controlling M. hapla and Pratylenchus spp. were conducted in Niedersachsen, Germany. Results from these trials can be summarized as follows. For M. hapla, best control was achieved with black fallow and maize in combination with weed control. Fodder radish...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection.
Ano: 2005
URL: http://orgprints.org/3477/1/3477.pdf

Below ground nitrogen dynamics in the sequence clover-grass maize in the DOK long term experiment
Provedor de dados: 21
Autores: Mayer, Jochen; Oberson, Astrid; Lüscher, Andreas; Frossard, Emmanuel; Hammelehle, Andreas.
We investigated the effect of organic versus conventional cropping systems on the below ground nitrogen inputs of Trifolium pratense L., its transfer to corresponding grass and the fate in the soil organic matter in the clover-grass ley of the DOK long term experiment, Switzerland. BGN tended to be largest in conventional and organic treatments with standard fertilisation and decreased with lower fertilisation intensity. The largest amount of clover N transferred to grass was observed in the minerally fertilised conventional treatment. Clover N derived from rhizodeposition was rapidly stabilised in all treatments to clay rich fractions and thus clover N will have a relatively low direct N contribution to subsequent nonlegumes.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/24030/1/24030_MM.pdf

Benefits of winter cover crops and no-tillage for microbial parameters in a Brazilian Oxisol: A long-term study.
Provedor de dados: 21
Autores: BALOTA, E.L.; CALEGARI, A.; NAKATINI , A.S.; COYNE, M.S.
Soil degradation in Brazil is a concern due to intensive agricultural production. Combining conservation practice, such as no-tillage, with winter cover crops may increase microbial activity and enhance soil quality more than  either practice alone. This research evaluated the  benefits of long-term (23 years) winter cover crops and reduced tillage on soil microbial quality indicators in an Oxisol from Paraná State, Southern Brazil. The winter cover treatments were: fallow, black oat, wheat, radish, blue lupin, and hairy vetch in conventional (plow) or no-tillage management; the summer crop was a soybean/maize rotation. Soil quality parameters included organic C, microbial biomass C and N, total and labile  polysaccharide, easily extractable and total...
Tipo: Journal paper
Palavras-chave: Soil biology; Biodiversity and ecosystem services.
Ano: 2014
URL: http://orgprints.org/29930/1/Balota%202014-%20Winter%20Crop%20Soil%20Quality.pdf

BETTER DEAD THAN GM-FED?  INFORMATION AND THE EFFECTS OF CONSUMERS' RESISTANCE TO GM-FOODS IN HIGH-INCOME COUNTRIES
Provedor de dados: 31
Autores: Huffman,   Wallace E.; Rousu,   Matthew C.; Shogren,   Jason F.; Tegene,   Abebayehu.
This paper addressed the puzzling resistance of Presidents of southern African countries to food aid in 2002, given near certain starvation and long-term negative health effects of malnutrition of their constituents.  First, I show that NGOs led by Greenpeace and Friends of the Earth are disseminating information claiming that GM foods are dangerous to human health and are "Frankenfoods."  Second, people in European Union countries, who are not in any danger of starvation, have strong preferences for non-GM foods, which they can easily afford.  Over the long term, however, the tastes of EU consumers matter to southern African countries because some of these countries hope to export agricultural products in the future.  GM-food aid, which most likely would...
Tipo: Working or Discussion Paper
Palavras-chave: Food Consumption/Nutrition/Food Safety; Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/18208

Bewirtschaftungseffekte auf Wurzelbiomasse und Kohlenstoff-Rhizodeposition von Mais in zwei Schweizer Langzeitversuchen
Provedor de dados: 21
Autores: Hirte, J.; Leifeld, J.; Oberholzer, H.-R.; Mayer, J.
Below ground carbon (BGC) inputs by agricultural plants into the soil are an important variable in soil carbon (C) modelling. The sources for BGC inputs are dead root biomass and C release by living roots (C rhizodeposition). Since management effects on BGC inputs are not profoundly understood, we address the following research questions in this research project: (i) What are the proportions of root biomass and C rhizodeposition of the total BGC input in the topsoil and subsoil under maize cultivation at different sites? (ii) Does long-term fertilization practice affect total root biomass, root distribution, shoot/root ratios, and C rhizodeposition of maize? Results obtained from field experiments in 2013 on two Swiss long-term experimental sites (“DOK”...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality Cereals; Pulses and oilseeds.
Ano: 2015
URL: http://orgprints.org/27237/1/27237_hirte.pdf

Beyond semi-dwarf wheat yield increases: impacts on the Australian wheat industry of on-going spillovers from the International Maize and Wheat Improvement Center
Provedor de dados: 31
Autores: Brennan,   John P.
Wheat genetic materials developed from research at the International Maize and Wheat Improvement Center (CIMMYT) in Mexico for developing countries have provided spillover benefits to Australia. Varieties developed from those genetic materials have resulted in yield increases in Australia. While the initial impact came through the introduction of higher-yielding semi-dwarf wheat crops, those impacts have continued in the post-semidwarf period. CIMMYT’s success in developing countries has also reduced the world price for wheat. While the lower prices affect returns in Australia, the increased yields in Australia from the CIMMYT spillovers from both the semi-dwarfs and the postsemidwarf phases have provided benefits to Australia averaging A $30 million per...
Tipo: Article
Palavras-chave: R&amp;D evaluation; R&amp;D policy; Spillovers; Technology adoption; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007
URL: http://purl.umn.edu/118519

Bi-cropping fodder maize in an existing (grass)clover sward
Provedor de dados: 21
Autores: Prins, U.; Eekeren, N. van; Oomen, G.J.M.
Organic cultivation of fodder maize is still considered to be difficult. Weed pressure, soil structure degradation during harvest and low nutrient efficiency are some of the common problems. Directly sowing maize in a (grass)clover sward using special-ized drilling machines can solve these problems. In a bi-cropping experiment under organic conditions we found similar yields as the reference treatment (ploughing) when the maize was sown in a clover sward, the roots of the remaining sward were cut one week after sowing and an additional fertiliser was applied.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Weed management; Air and water emissions.
Ano: 2006
URL: http://orgprints.org/7296/1/Bi%2Dcropping_Maize_paper_Odense_final.pdf

Bio Suisse Bans Hybrid Cereals
Provedor de dados: 21
Autores: Arncken, Christine; Schmid, Otto.
On April 19th, 2006, the 100 delegates of Bio Suisse, the Swiss organic umbrella organization, voted to ban Hybrid varieties in organic cereals (except maize). This decision primarily concerns rye. Organic rye is grown on only 250 ha, about 20% of which is sown to hybrid varieties at present. About 60% of total organic demand is imported. Hybrid varieties of the other cereals are not yet being grown. The delegates decided that it is time to act now to send a signal to breeders and to the international organic community before the alternatives to hybrids vanish.
Tipo: Conference paper, poster, etc.
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2006
URL: http://orgprints.org/8574/1/arncken%2Dschmid%2D2006%2Dhybrids.pdf

BIO SUISSE Considers Hybrid Rye Ban
Provedor de dados: 21
Autores: Arncken, Christine.
Hybrid varieties are increasingly and widely used in organic farming, although there has  never been a conscious decision to do so. This is especially true for vegetables and maize. For bread cereals, especially rye, the decision can still be taken in Switzerland. Organic rye is grown on only 250 ha, about 20% of which are hybrid varieties. About 60% of the total organic demand is imported.
Tipo: Conference paper, poster, etc.
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2005
URL: http://orgprints.org/8584/1/Arncken%2D2005%2DPosterHybridRyeBan.pdf

Bioactivity of Tepa (Laureliopsis philippiana (Looser) Shodde) Powder to Sitophilus zeamais Motschulsky Control in Laboratory
Provedor de dados: 117
Autores: Ortiz U,Ana; Silva A,Gonzalo; Urbina P,Angélica; Zapata S.M,Nelson; Rodríguez M,J. Concepción; Lagunes T,Angel.
The maize weevil (Sitophilus zeamais Motschulsky) is one of the most widespread pests and causes heavy losses of stored grain throughout the world. Control of this insect is primarily dependent upon continued applications of organophosphorus and pyrethroid insecticides and fumigants as phosphine but the increasing problems with current insecticides drive the need for research and to develop new control methods. The insecticidal effect of leaf powder of tepa, Laureliopsis philippiana (Looser) Shodde, was evaluated against maize weevil under laboratory conditions. The parameters evaluated were adult mortality and emergence, grain weight loss and germination, and residual, repellent and fumigant effect. The highest levels of insect mortality were registered...
Tipo: Journal article
Palavras-chave: Stored grains; Botanical insecticides; Maize weevil.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100011

Biochar and Manure Affect Calcareous Soil and Corn Silage Nutrient Concentrations and Uptake.
Provedor de dados: 18
Autores: Lentz, R.D.; Ippolito, J.A.
When added to soils, carbon-rich biochar derived from the pyrolysis of woody materials can sequester atmospheric carbon dioxide, mitigate climate change, and potentially increase crop productivity.  However, research is needed to confirm the suitability and sustainability of biochar application to different soils.  We applied four treatments (dry wt.) to an irrigated calcareous soil in Nov. 2008: control; stockpiled dairy manure, 18.8 Mg/ha; hardwood-derived biochar, 22.4 Mg/ha; and manure + biochar using previous rates.  Nitrogen fertilizer was applied when needed (based on pre-season soil test N and crop requirements) in all plots and years with N mineralized from added manure included in this determination.  Available soil nutrients (NH4-N, NO3-N, Olsen...
Tipo: Article
Palavras-chave: Corn / maize; Manure; Calcareous soil; Soil.
Ano: 2012
URL: http://eprints.nwisrl.ars.usda.gov/1459/1/1424.pdf

Biochar association with phosphate fertilizer and its influence on phosphorus use efficiency by maize
Provedor de dados: 64
Autores: Santos,Sara Ramos dos; Lustosa Filho,José Ferreira; Vergütz,Leonardus; Melo,Leônidas Carrijo Azevedo.
ABSTRACT The use of fertilizers with some degree of protection of the phosphate ions can reduce soil adsorption and increase the absorption by plants, increasing the efficiency of phosphorus (P) fertilization. This study aimed to evaluate the performance of a phosphate fertilizer associated with biochar in granules in a P-fixing soil in a greenhouse experiment. Biochars were produced from two sources of biomass: sugarcane bagasse (SB) and wood sawdust (WS), which were pyrolysed at two temperatures (350 °C and 700 °C). After chemical and physical characterization, the biochar samples were granulated with triple superphosphate (TSP) in a 3:1 ratio (TSP: biochar). The agronomic evaluation of the fertilizers was carried out by two successive maize crops (Zea...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic residues; Adsorption; Pyrolysis; Tropical soils.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100202

Biochar decomposition in agricultural soils of temperate climate
Provedor de dados: 21
Autores: Scheifele, Michael; Buegger, Franz; Fliessbach, Andreas; Mäder, Paul; Schulin, Rainer; Gattinger, Andreas.
Results  › Carbon mineralization rates were highest in maize straw and lowest in pyrochar amended soil.  › Pyrochar showed even lower CO2 fluxes than non-amended soil.  › Initial mineralization rates of maize straw and hydrochar were higher in soil M, whereas in Soil D the pyrochar was decomposed slightly faster.  › Hydrochar derived carbon was readily incorporated in the microbial biomass of both soils, pyrochar resisted nearly completely.  › Comparison of carbon pools CO2 , Cmic and Corg at day 12 and day 205 shows that a stabilsation of maize feedstock of more than a double could be achieved with HTC and far beyond that scale with pyrolysis.
Tipo: Conference paper, poster, etc.
Palavras-chave: Air and water emissions; Soil.
Ano: 2013
URL: http://orgprints.org/25774/1/Scheifele_et_al_Biochar_degratdation_2013_def.pdf

Biochemical and physical kernel properties of a standard maize hybrid in different TopCross™ Blends
Provedor de dados: 63
Autores: Vancetovic,Jelena; Ignjatovic-Micic,Dragana; Trbovic,Dejana; Delic,Nenad; Bozinovic,Sofija; Nikolic,Ana; Kostadinovic,Marija.
ABSTRACT A pilot experiment was undertaken in order to examine high oil populations of maize (Zea mays L.) to be used as pollinators in TopCross blends with commercial ZP341 standard hybrid. Five high oil populations (HOPs) from the Maize Research Institute (MRI) gene bank were chosen for this research, according to their high grain oil content, synchrony between silking of ZP341 and anthesis of the populations and good agronomic performances in 2012. Selfing of ZP341 and HOPs, as well as crosses of ZP341 cmsS sterile × HOPs were carried out in 2013. Oil content, fatty acid composition, protein and tryptophan content, and physical characteristics of the obtained kernels were measured. Four HOPs showed significant positive influence on the oil content in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; High oil; Pollinators.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000600461

Bioeconomic evaluation of allelopathic crop leachates integrated with reduced doses of herbicide for horse purslane management in maize under field conditions
Provedor de dados: 87
Autores: N. Mushtaq,Muhammad; I. Hashmi,Muhammad; Tariq,Tabinda; Matloob,Amar; Hussain,Safdar; A. Cheema,Zahid.
Abstract  Background:  Continuous use of commercial herbicides is posing a severe threat to environment and creating herbicide resistant weeds. Allelopathy offers a promising alternative to commercial herbicides for sustainable weed management. The farmers are highly concerned with maximum yield as well as cost of the weed control techniques.  Objective:  To investigate economic and weed control efficiency of allelopathic crop water leachates mixed with lower rates of herbicide.  Methods:  Rapeseed (Brassica napus L.), sunflower (Helianthus annuus L.) and sorghum (Sorghum bicolor L.) crop leachates (18 L ha-1 each) tank mixed with lower doses (25, 33 and 50% of recommended dose) of S-metolachlor+atrazine were sprayed as pre-emergence for horse purslane...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Bioeconomic; Integrated weed management; Marginal analysis; Trianthema portulacastrum; Zea mays.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100317

Biofuels and Rural Economic Development in Latin America and the Caribbean
Provedor de dados: 31
Autores: Falck-Zepeda,   Jose Benjamin; Msangi,   Siwa; Sulser,   Timothy B.; Zambrano,   Patricia.
Biofuel expansion is seen as a way to reduce dependence on fossil fuels, as an alternative energy source for transportation and other uses, as a way to reduce Green House Gases, and as way to revitalize the agricultural sector. Very little discussions have been focused on Latin America, except for Brazil. Potential negative impacts re-enforce the need of performing more in depth analysis of the potential impact of biofuels expansion in Latin America and the Caribbean (LAC). Paper estimates biofuels production potential based on current production situation and develops a forward-looking analysis of the long-term impact of biofuels expansion in Latin America and its effects on prices, trade, food security, malnutrition and other indicators using the...
Tipo: Conference Paper or Presentation
Palavras-chave: Community/Rural/Urban Development; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/6113

Biogas and ethanol potentials in selected biomasses for  organic farming
Provedor de dados: 21
Autores: Oleskowicz-Popiel, Piotr; Nielsen, Henrik Bangsø; Thomsen, Anne Belinda; Schmidt, Jens Ejbye.
The production of bioenergy in organic agriculture (OA) can reduce its dependency on fossil fuels and decrease greenhouse‐gases (GHG) emissions; consequently increasing the sustainability of organic farming. Different biomasses were characterized biologically and chemically for their biogas and bioethanol potential at organic farms in Denmark. Batch experiments indicated methane yield [GJ/ha]: 260.7 (fresh maize), 272.7 (maize silage), 127.1 (fresh rye), 169.7 (rye silage), 161.7 (dried rye), 110.5 (fresh clover), 117.8 (clover silage), 72.3 (dried clover), and 41.1 (dried vetch). Theoretical ethanol yield [GJ/ha] showed: 119.8 (fresh maize), 109.2 (maize silage), 36.9 (fresh rye), 39.9 (rye silage), 84.7 (dried rye), 28.9 (fresh clover), 24.4 (clover...
Tipo: Journal paper
Palavras-chave: Post harvest management and techniques.
Ano: 2011
URL: http://orgprints.org/19009/4/19009.pdf

Biological activity and persistence of pirimiphos-methyl applied to maize grain at different temperatures
Provedor de dados: 91
Autores: Silveira,Rodrigo D.; Faroni,Lêda R. A.; Guedes,Raul N. C.; Queiroz,Maria E. L. R.; Pimentel,Marco A. G.
The expansion of dryeration may impose a further problem for insect control with protectants - the high grain temperatures during insecticide spraying. To assess the impact of this procedure on insecticide activity, maize grains at different temperatures (25, 30, 35, 40 and 45 °C) were sprayed with pirimiphos-methyl. Residue analyses were carried out every 30 days and insecticide biological activity towards Sitophilus zeamais and Tribolium castaneum was assessed every 15 days throughout the experimental period of 90 days. Insect mortality was evaluated after 48 h. Pirimiphos-methyl residue decreased with increased storage time and grain temperature during spraying. Similar trends were also observed for mortality of S. zeamais and T. castaneum, which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sitophilus zeamais; Tribolium castaneum; Organophosphate; Residue; Insect control.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662009000600010

Biological activity of soils under systems of organic farming, agroforestry and pasture in the Amazon
Provedor de dados: 124
Autores: Silva,Irene Ferro; Araújo Neto,Sebastião Elviro de; Kusdra,Jorge Ferreira.
The aim of this work was to evaluate biological indicators of soils used under the systems of organic farming, agroforestry and pasture in the south western part of the Amazon region of Brazil. The experiment was carried out at the Seridó Ecological Site, located in Rio Branco, in the state of Acre, Brazil. The experimental design was completely randomised, with five treatments (land-use systems) and six replications, with each replication consisting of four single samples. The systems of land use evaluated were: 1) native forest (control); 2) agroforestry (AFS); 3) pasture; 4) intercropped passion fruit, maize, cassava, pineapple and forage peanut; and 5) intercropped passion fruit, maize, cassava, pineapple and tropical kudzu. It was found that organic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic production; Carbon dynamics; Ground cover.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000300001

Biological control of phytopathogenic fungi by endophytic actinomycetes isolated from maize (Zea mays L.)
Provedor de dados: 52
Autores: Costa,Francisco Gheler; Zucchi,Tiago Domingues; Melo,Itamar Soares de.
This work aimed a survey on the biodiversity of maize endophytic actinomycete, and an evaluation of their potential to control the phytopathogenic fungi. From several regions of São Paulo state, 40 strains were isolated from the healthy maize plants. The identification of these strains, based on morphological properties and fatty acid methyl ester (FAME) profile showed that most of them belonged to the Streptomyces genus. These isolates were first screened for the growth inhibition of phytopathogenic fungi and results showed that all the isolate were able to inhibit the development of at least one tested pathogen. Two selected isolates were then evaluated for the control of P. aphanidermatum in cucumber (Cucumis sativa L.) under greenhouse conditions....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endophytes; Actinomycete; Streptomyces; Pythium aphanidermatum; Dumping-off.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000600009

Biological evaluation of a nutritional supplement prepared with QPM Maize cultivar BR 473 and other traditional food items
Provedor de dados: 52
Autores: Paula,Heberth de; Santos,Rinaldo C.; Silva,Marcelo E.; Glória,Enara C. S.; Pedrosa,Maria Lúcia; Almeida,Nízia A. V.; Costa,Alexandre S. V.; Malaquias,Luiz Cosme C.
Quality Protein Maize (QPM) cultivar BR 473 was employed, together with soybean flour, brown sugar, banana meal and oat meal, for the preparation of a nutritional supplement.. 21-day old male Fisher rats were fed diets containing the supplement as a protein source, both with and without soybean flour; casein diets with 10 or 7% protein served as respective controls. Protein Efficiency Ratio (PER), Net Protein Utilization (NPU), Net Protein Retention (NPR) and Digestibility were determined. Blood biochemical parameters (glucose, cholesterol, urea, hemoglobin, albumin and total protein) were also measured in the animals and showed that all were in good health condition at the end of the experiment. The obtained results for PER, NPU and NPR indicated that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: QPM Maize; Protein; Biological evaluation; Nutritional supplement.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200012

Biological nitrogen fixation and nitrogen and phosphorus budgets in farmer-managed intercrops of maize-pigeonpea in semi-arid southern and eastern Africa
Provedor de dados: 21
Autores: Adu-Gyamfi, J. J.; Myaka, F.A.; Sakala, W.D.; Odgaard, R.; Vesterager, J. M.; Høgh-Jensen, Henning.
Maize (Zea mays L.) is a major staple food in Sub-Saharan Africa but low soil fertility, limited resources and droughts keep yields low. Cultivation of maize intercropped with pigeonpea (Cajanus cajan L. Millsp.) is common in some areas of eastern and southern Africa. The objectives of this study were (1) to investigate dry matter, nitrogen (N) and phosphorus (P) accumulation in different plant components of maize-pigeonpea intercropping systems and (2) to report the effects of the intercrops on soil fertility. Maize-pigeonpea intercrops were compared to sole maize grown using farmers’ practices. Intercropping maize and pigeonpea increased (P&lt;0.05) total system yield compared to sole maize in terms of biomass, N and P accumulation. Pigeonpea planted in...
Tipo: Journal paper
Palavras-chave: Farming Systems.
Ano: 2007
URL: http://orgprints.org/18306/1/18306.pdf

Biological profitability of maize inoculation with selected rhizosphere micro organisms (Pseudomonas fluorescens and Glomus intraradices) under Water Deficit Stress
Provedor de dados: 21
Autores: Aghaalikhani, Dr. Majid; Ehteshami, Dr. Seyyed Mohammad Reza.
This research focused on evaluating the usefulness of an arbuscular mycorrhizal fungus (Glomus intraradices) and a plant growth-promoting rhizobacterium (Pseudomonas fluorescens) to maize growth under water deficit stress. Field experiment was conducted at Soil and water research institute, Karaj Station, Iran, during 2006 growing season.  Biological positive effects of the micro organisms  on plant growth, nutrient uptake, grain yield and yield components in maize plants was recorded in the treatment receiving mixed inoculums of G. intraradices  and P. fluorescens.  Maize shoot  P content, grain yield, yield components, harvest index, grain N and P, soil available P, root colonization percentage and water use efficiency increased significantly with the G....
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Irrigation and drainage.
Ano: 2008
URL: http://orgprints.org/11833/1/Aghaalikhani_11833_ed.doc

Biology and nutrition of Spodoptera frugiperda (Lepidoptera: Noctuidae) fed on different food sources
Provedor de dados: 63
Autores: Silva,Débora Mello da; Bueno,Adeney de Freitas; Andrade,Karine; Stecca,Cristiane dos Santos; Neves,Pedro Manuel Oliveira Janeiro; Oliveira,Maria Cristina Neves de.
ABSTRACT: We studied Spodoptera frugiperda development using different food sources in the laboratory and field. Newly hatched larvae were fed soybean, cotton, maize, wheat, and oat leaves. An artificial diet was used as the control. Duration of pre-pupal, pupal, and larva-adult period, pupal weight, sex ratio, survival, larva feeding preferences, oviposition preferences, and nutritional quality of different hosts were evaluated. Insects fed on wheat showed the shortest larva-adult period. The insects fed on cotton and soybean had longer larval development cycles and pupae of lower weight. Feeding preference was evident for third instar larvae and did not differ between wheat, oat, maize, and soybean, which were the preferred hosts. Moths oviposited to a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural entomology; Feeding behavior; Insect-plant interactions.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100018

Biomasa acumulada e intercambio gaseoso en maíz proveniente de semilla de diferente tamaño bajo humedad favorable y restringida: (con 3 tablas)
Provedor de dados: 85
Autores: López-Santillán,José Alberto; Castro-Nava,Sergio; Trejo-López,Carlos; Mendoza-Castillo,Ma. Del Carmen; Ortiz-Cereceres,Joaquín.
Se evaluó la velocidad de germinación y el crecimiento de plántulas de maíz provenientes de semilla de dos diferentes tamaños para determinarlas diferencias en la producción de biomasa durante la etapa vegetativa y estimar los efectos de una condición diferente de disponibilidad de humedad sobre el estatus fisiológico de la plántula. Una mayor cantidad de biomasa en el endospermo y en el embrión de las semillas permitió una mayor disponibilidad de reservas durante la etapa posterior a la germinación y anterior a la emergencia, dando como resultado un mayor vigor inicial en las plántulas evaluadas, y en consecuencia una mayor acumulación de biomasa, tanto radical como aérea, durante la etapa vegetativa. La presencia de una restricción de humedad durante la...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Seed size; Seedling vigor; Biomass; Drought; Gas exchange.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100030

Biomasa y análisis bioquímico en teocintle perenne (Zea diploperennis Iltis, Doebley y Guzmán) en diferentes etapas fenológicas.
Provedor de dados: 32
Autores: Rojas Victoria, Néstor Jorge.
El teocintle perenne (Zea diploperennis) es endémico de la Sierra de Manantlán en el sur de Jalisco, se considera una especie con cierto valor forrajero en las regiones de origen y en regiones con escasas precipitaciones. Presenta una alta capacidad de adaptación a distintos ambientes y además se considera tolerante a siete de nueve enfermedades producidas por virus, hongos y bacterias (espiroplasmales) que atacan al maíz.  El  objetivo de la presente investigación fue evaluar la producción de biomasa, la dinámica de acumulación de azucares e identificación de proteínas en diferentes órganos de teocintle, en distintas etapas fenológicas. El estudio se realizó en los invernaderos del Colegio de Postgraduados, Montecillo, México. Se sembraron semillas de...
Palavras-chave: Zea diploperennis; Z. mays L.; Materia seca; Azúcares solubles; Proteínas solubles; Dry matter; Soluble sugars; Soluble proteins; Maestría; Botánica; Teocintle.
Ano: 2010
URL: http://hdl.handle.net/10521/174

Biomasa y análisis bioquímico en teocintle perenne (Zea diploperennis Iltis, Doebley y Guzmán) en diferentes etapas fenológicas.
Provedor de dados: 32
Autores: Rojas Victoria, Néstor Jorge.
El teocintle perenne (Zea diploperennis) es endémico de la Sierra de Manantlán en el sur de Jalisco, se considera una especie con cierto valor forrajero en las regiones de origen y en regiones con escasas precipitaciones. Presenta una alta capacidad de adaptación a distintos ambientes y además se considera tolerante a siete de nueve enfermedades producidas por virus, hongos y bacterias (espiroplasmales) que atacan al maíz.  El  objetivo de la presente investigación fue evaluar la producción de biomasa, la dinámica de acumulación de azucares e identificación de proteínas en diferentes órganos de teocintle, en distintas etapas fenológicas. El estudio se realizó en los invernaderos del Colegio de Postgraduados, Montecillo, México. Se sembraron semillas de...
Palavras-chave: Zea diploperennis; Z. mays L.; Materia seca; Azúcares solubles; Proteínas solubles; Dry matter; Soluble sugars; Soluble proteins; Maestría; Botánica; Teocintle.
Ano: 2010
URL: http://hdl.handle.net/10521/174

Biomass accumulation and chemical composition of Massai grass intercropped with forage legumes on an integrated crop-livestock-forest system
Provedor de dados: 96
Autores: Gama,Tatiana da Costa Moreno; Volpe,Edimilson; Lempp,Beatriz.
The objective was to evaluate the use of woody legumes (Albizia lebbeck, Cratylia argentea, Dipteryx Allata (Baru), a Leucaena hybrid (L. leucocephala + L. diversifolia), and Leucaena leucocephalacv. Cunningham) and herbaceous legumes (Arachis pintoi) intercropped with Panicum maximum cv. Massai, simultaneously implanted in a maize crop. The study made use of a randomized block experimental design with four replications. Assessments of biomass accumulation and forage nutritional value were made after the maize harvest, between June 2008 and October 2010. It was found that the residues of maize provided better growing conditions for Massai grass during the dry season. L. leucocephala cv. Cunningham and the Leucaena hybrid had the highest accumulation of all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Albizia lebbeck; Arachis pintoi; Crop-livestock integration; Cratylia argentea; Dipteryx allata; Leucaena leucocephala.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000600279

Biometric analysis in maize genotypes suitable for baby corn production in organic farming system
Provedor de dados: 75
Autores: Nascimento,Maxwel R; Santos,Paulo Ricardo; Coelho,Fábio C; Jaeggi,Mário Euclides PC; Costa,Kleyton Danilo S; Souza,Maurício N.
ABSTRACT The aim of this study was to estimate and quantify the degree of association between phytotechnical variables for simultaneous selection of maize genotypes suitable to produce baby corn. Seven genotypes were arranged in field in randomized complete block design with four replicates. Genetic parameters, simple, path and canonical correlations of phytotechnical variables were estimated. The variables production of marketable spikes, length of marketable spikes, final plant stand and plant height showed over 80% heritability and variation index higher than the unity, indicating that superior genotypes can be obtained and selection gains. Significant phenotypic and genotypic correlations were observed for production of marketable spikes, positive and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Path analysis; Canonical correlation; Simultaneous selection.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300419

Bioprospecting insecticidal compounds from plants native to Mato Grosso do Sul, Brazil
Provedor de dados: 39
Autores: Souza,Antonio P.; Marques,Maria R.; Mahmoud,Talal S.; Caputo,Bruno A.; Canhete,Gabriel M.; Leite,Carla B.; Lima,Dênis P. de.
This paper reports on an evaluation of the insecticidal activity of extracts prepared from leaves of Tapirira guianensis Aubl. (Anacardiaceae), Attalea phalerata (Mart. ex Spreng.) Burret (Arecaceae), Eugenia uniflora L. (Myrtaceae), and Gomphrena elegans Mart. (Amaranthaceae) and from stems of Myracrodruon urundeuva Allemão (Anacardiaceae). Four extracts and 18 fractions with a range of polarities were tested. Ten-gram batches of wheat grains were each nebulized with 1 mL of a separate extract at 10% w/v. After solvent evaporation at 38 ºC, the grains were placed into flasks along with 20 unsexed 10- to 20-day old adult individuals of Sitophilus zeamais. The assessment was carried out on the fifth and tenth day by counting and discarding the dead insects....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Secondary metabolites; Insecticidal plant; Maize weevil; Sitophilus zeamais.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062008000400024

Bioprospection of yeasts as biocontrol agents against phytopathogenic molds
Provedor de dados: 52
Autores: Rosa-Magri,Márcia Maria; Tauk-Tornisielo,Sâmia Maria; Ceccato-Antonini,Sandra Regina.
Yeasts isolated from sugar cane and maize rhizosphere, leaves and stalks were screened against the phytopathogenic molds Colletotrichum sublineolum and Colletotrichum graminicola, both causal agents of the anthracnose disease in sorghum and maize, respectively. Strains identified as Torulaspora globosa and Candida intermedia were able to inhibit the mold growth, with the first species also exhibiting killer activity. No previous report on the application and potentiality of these yeasts as biocontrol agents were found neither the killer phenotype in Torulaspora globosa.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioprospection; Colletotrichum graminicola; Colletotrichum sublineolum; Killer activity; Mycocinogenic.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100001

Biotechnology and Economic Development:  The Economic Benefits of Maize Streak Virus Tolerant Maize in Kenya
Provedor de dados: 31
Autores: Andreu,   Monica Lopez; Peterson,   Hikaru Hanawa; Grunewald,   Orlen C.; Norman,   David W.
For countries that could not benefit from the Green Revolution due to heterogeneous and unfavorable biophysical environments, agricultural biotechnology potentially provides a means of improving the quality and quantity of agricultural production.  This paper analyses some of the major issues relating to the utilization of biotechnology in Kenya.  A partial equilibrium trade model is applied to Kenya's corn market to study the potential of genetically modified maize that is tolerant to the Maize Streak Virus. The model accounts for home production and consumption; the positive results of the welfare estimation are disaggregated between consumers, large and small Kenyan corn farms.
Tipo: Conference Paper or Presentation
Palavras-chave: Community/Rural/Urban Development; Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/35271

Boron supplementation in broiler diets
Provedor de dados: 89
Autores: Fassani,EJ; Bertechini,AG; Brito,JAG; Kato,RK; Fialho,ET; Geraldo,A.
Boron supplementation in broiler feed is not a routine practice. However, some reports suggest a positive effect of boron on performance. This study assessed the effects of boron supplementation on broiler performance. Diets were based on maize and soybean meal, using boric acid P.A. as boron source. Six supplementation levels (0, 30, 60, 90, 120 and 150 ppm) were evaluated using 1,440 one-day old males housed at a density of 30 chickens in each of 48 experimental plots of 3m². A completely randomized block design was used with 8 replicates. Feed intake, weight gain and feed conversion were assessed in the periods from 1 to 7 days, 1 to 21 days and 1 to 42 days of age, and viability was evaluated for the total 42-day rearing period. No performance variable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal nutrition; Boron; Broiler; Chicken; Performance.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400004

Boundary line approach applied among crop emergence parameters and soil physical properties
Provedor de dados: 91
Autores: Guedes Filho,Osvaldo; Silva,Alvaro P.; Giarola,Neyde F. B.; Tormena,Cássio A.; Mazzini-Guedes,Renata B.
ABSTRACT The boundary line technique has been proposed for interpreting biological data where one variable is a biological response and the other is an independent variable. The objective of this study was to correlate maize and soybean emergence parameters with soil seedbed physical properties using a boundary line approach. The study was performed at the experimental farm belonging to the Universidade Estadual de Ponta Grossa, in the municipality of Ponta Grossa, Paraná State, Brazil. The area has been managed under a no-tillage system for 18 years. The emergence percentage (EP) and emergence rate (ER) were determined for maize and soybean crops. Soil seedbed physical properties were evaluated for both crop species and included soil penetration...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seeds; Biological data; Soil-plant relations.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000600454

Brachiaria physiological parameters in agroforestry systems
Provedor de dados: 65
Autores: Santos,Márcia Vitória; Ferreira,Evander Alves; Valadão,Daniel; Oliveira,Fabiana Lopes Ramos de; Machado,Vitor Diniz; Silveira,Raul Ribeiro; Souza,Matheus de Freitas.
ABSTRACT: This study aimed to assess the effects of Eucalyptus and maize shading on characteristics related to water use by Brachiaria in agroforestry systems. Treatments were arranged in a split-split-plot design, with plots consisting of different spacing between Eucalyptus plants (12.0×2.0m and 12.0×4.0m), split-plots of different distances between Brachiaria and Eucalyptus (6.0, 4.0, and 2.0m), and split-split-plots of Brachiaria sowing sites (maize row and inter-row). One treatment with Brachiaria under full sunlight was included. Bread grass intercropping in maize inter-rows associated with the densest Eucalyptus spacing and bread grass proximity to Eucalyptus tree crowns adversely affected the stomatal conductance, internal carbon, and transpiration...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urochloa brizantha; Production physiology; Crop-livestock-forest integration.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500653

Brazilian cheese bread rolls from fermented and native waxy maize starch
Provedor de dados: 64
Autores: Teixeira,Camila Souza; Neves,Glenda Antonia da Rocha; Oliveira,Tatianne Ferreira de; Caliari,Márcio; Soares Júnior,Manoel Soares.
ABSTRACT Brazilian cheese bread (CB) rolls are gluten-free bread made from sour cassava starch. They are soft in the center and have crispy crust, reminding of the extruded structure. Although native waxy maize starch (WMS) has higher technologic quality, it has not been used in CB rolls; therefore, this study aimed to investigate the use of WMS and the backslopping fermentation process plus sun drying in WMS to replace sour cassava starch (0, 25%, 75%, and 100%) and the effects on dough development, color, and textural properties. Data were analyzed using variance and Tukey test (p ≤ 0.05%), and the results were set against a commercial product from cassava starch. The better formulation was characterized by proximal composition, sensorial acceptance, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gluten-free bread; Backslopping fermentation; Starch modification; Bakery; Celiac diet.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100403

Brazilian maize genotypes sensitivity to water deficit estimated through a simple crop yield model
Provedor de dados: 86
Autores: Andrioli,Kleber Gustavo; Sentelhas,Paulo Cesar.
The objective of this work was to determine the sensitivity of maize (Zea mays) genotypes to water deficit, using a simple agrometeorological crop yield model. Crop actual yield and agronomic data of 26 genotypes were obtained from the Maize National Assays carried out in ten locations, in four Brazilian states, from 1998 to 2006. Weather information for each experimental location and period were obtained from the closest weather station. Water deficit sensitivity index (Ky) was determined using the crop yield depletion model. Genotypes can be divided into two groups according to their resistance to water deficit. Normal resistance genotypes had Ky ranging from 0.4 to 0.5 in vegetative period, 1.4 to 1.5 in flowering, 0.3 to 0.6 in fruiting, and 0.1 to 0.3...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Agrometeorology; Drought resistance; Water balance.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000700001

Breaking the "Fertilizer Poverty" and Food Insecurity Traps in Smallholder Maize Based Farming System in Southern Africa: Experiences and Lessons from Soil Fertility Network/Economics and Policy Working Group (EPWG)
Provedor de dados: 31
Autores: Mekuria,   Mulugetta; Waddington,   Stephen R.; Siziba,   Shephard.
Smallholder farmers in southern Africa face acute food insecurity because the productive capacity of their soils has declined. These resource-poor farmers increasingly cannot afford mineral fertilizers Farmers mentioned the lack of fertilizers for their depleted soils as the most important constraint- "Empty Soils, stomachs and pockets." In response to this challenge, Soil Fert Net researchers in southern Africa have developed and promoted a range of "best-bet" soil fertility management technological (SFMT) options for farmers. This paper presents a review of financial, adoption, institutional and policy analysis undertaken by EPWG members on the use of SFMT by smallholders. Financial and risk analysis tools, selected econometric models and policy analysis...
Tipo: Conference Paper or Presentation
Palavras-chave: Policy briefs; Policy analysis matrix; Markets; Cropping systems; Legumes; N fertilizer; Crop Production/Industries; Food Security and Poverty.
Ano: 2004
URL: http://purl.umn.edu/9515

Breeding and genetics for improvement of yield and quality of corn
Provedor de dados: 106
14 tables
Palavras-chave: Corn; Maize; Genetic improvement; Plant breeding; Genetics; Yields; Quality; ข้าวโพด; ผลผลิต; คุณภาพ.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3751

Breeding and genetics for the improvement of grain yield and quality of corn
Provedor de dados: 106
10 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Yields; Quality; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ; ประเทศไทย.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3791

Breeding and genetics for the improvement of yield and quality in Thailand
Provedor de dados: 106
Autores: Sujin Jinahyon; Taweesak Pulum; Tawatchai Prasatsrisupab; Weerasak Duangchantra; Prapa Sripichitt; Sansern Jampatong.
33 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Population improvement; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; การปรับปรุงพันธุ์; หน่วยดำเนินการ; หน่วยปฏิบัติการ; หน่วยคลังพันธุกรรม; หน่วยกิจกรรมพิเศษ; การสร้างประชากรข้าวโพด; การปรับปรุงประชากรข้าวโพด.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3954

Breeding and genetics for the improvement of yield and quality of corn
Provedor de dados: 106
4 ill., 36 tables
Palavras-chave: Corn; Maize; Genetic improvement; Plant breeding; Genetics; Yields; Quality; ข้าวโพด; การปรับปรุงพันธุกรรม.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3750

Breeding and genetics for the improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Somsak Sonwai; Sakol Chaisri; Suphot Iamsangsri; Vatcharee Lertmongkol; Sansern Jampatong; Anna Saimaneerat; Pratuengsri Sinchaisri; Somrak Noradechanon.
8 tables
Palavras-chave: Maize; Corn; Breeding; Genetics; Yield increase; Yield quality; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4494

Breeding and genetics for the improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Sutat Sriwatanapongse; Sansern Jampatong; Patcharee Konghiran; Boonlum Paysuwan; Chokechai Aekatasanawan; Sumpun Sittipanuwongse.
32 tables
Palavras-chave: Corn; Maize; Plant breeding; Composites; Hybrids; Yield trials; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; การปรับปรุงพันธุ์; โรคราน้ำค้าง; การทดสอบผลผลิต; พันธุ์ผสมเปิด; พันธุ์ลูกผสม; เขตกึ่งร้อน; เขตอบอุ่น; ความร่วมมือกับซิมมิท; ความร่วมมือกับเอกชน.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4129

Breeding and genetics for the improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Sansern Jampatong; Chokechai Aekatasanawan; Anna Saimaneerat; Orakit Prasertkit; Chatpong Balla; Yaudchai Petratanagool.
53 tables
Palavras-chave: Corn; Maize; Breeding; Corn yields; Corn quality; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4382

Breeding and genetics for the improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Sansern Jampatong; Chokechai Aekatasanawan; Anna Saimaneerat; Yodchai Petratanagool; Orakit Balla; Chatpong Balla.
1 ill., 30 tables
Palavras-chave: Maize; Corn; Breeding; Genetics; Yield increase; Yield quality; ข้าวโพด; การปรับปรุงพันธุ์พืช; การเพิ่มผลผลิต; คุณภาพ.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4236

Breeding and genetics for the improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Sansern Jampatong; Chokechai Aekatasanawan; Kittipong Tiantubtim.
16 tables
Palavras-chave: Maize; Corn; Breeding; Genetics; Yield increase; Yield; Quality; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4276

Breeding and genetics for the improvement of yield and quality of corn
Provedor de dados: 106
Autores: Weerasak Duangchantra; Prapa Sripichitt; Manop Subsorn; Sansern Jampatong; Patcharee Konghiran; Apichat Vanavijit.
5 ill., 10 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Variety trials; Yields; Quality; ข้าวโพด; การปรับปรุงพันธุ์; หน่วยดำเนินการ; โครงการข้าวโพดลูกผสม.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4085

Breeding and genetics for the improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Sansern Jampatong; Chokechai Aekatasanawan; Anna Saimaneerat.
20 tables
Palavras-chave: Corn; Maize; Yields; Quality; Breeding; Genetics; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4324

Breeding and genetics for the improvement of yield and quality of corn in Thailand
Provedor de dados: 106
Autores: Sujin Jinahyon.
42 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Yields; Quality; Yield trials; Variety trials; Downy mildew; Disease resistance; Thailand; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ; ประเทศไทย.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3822

Breeding and genetics for the improvement of yield and quality of corn in Thailand
Provedor de dados: 106
Autores: Sujin Jinahyon; Sutat Sriwatanapongse; Bunpote Tasanasuwan; Weerasak Duangchantra; Thawatchai Prasartsrisuparb; Suvit Panichying; Jarong Rungchuang.
31 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Yield trials; Varieties; Yields; Quality; Agronomic characters; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3860

Breeding and genetics for the improvement of yield and quality of corn in Thailand
Provedor de dados: 106
Autores: Sujin Jinahyon; Sutat Sriwatanapongse; Bunpote Tasanasuwan; Weerasak Duangchantra; Tawatchai Prasatsrisupab; Suvit Panichying; Sansern Jampatong; Vichien Sakulsom.
14 ill., 18 tables
Palavras-chave: Corn; Maize; Plant breeding; Yield trials; Yields; Quality; Variety trials; Agronomic characters; Downy mildew; Infection; ข้าวโพด; การปรับปรุงพันธุ์; การทดสอบผลผลิต; ผลผลิต; คุณภาพ.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3950

Breeding and genetics for the improvement of yield and quality of corn in Thailand
Provedor de dados: 106
2 ill., 37 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Yields; Quality; Thailand; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ; ประเทศไทย.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3790

Breeding and genetics for the improvement of yield and quality of corn in Thailand
Provedor de dados: 106
Autores: Tawatchai Prasatsrisupab; Anek Silapapun; Prapa Sripichitt; Patcharee Konghiran; Weerasak Duangchantra; Manop Subsorn; Sansern Jampatong.
38 tables
Palavras-chave: Corn; Maize; Plant breeding; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4006

Breeding for sugarcane downy mildew resistance in corn in Taiwan
Provedor de dados: 106
Autores: Chang, S.C.
1 table
Palavras-chave: Corn; Maize; Maize breeding; Sugarcane downy mildew; Plant breeding; Taiwan; ข้าวโพด; การปรับปรุงพันธุ์; โรคราน้ำค้าง.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3900

Breeding for symbioses – Mycorrhizae as a case study
Provedor de dados: 21
Autores: Hohmann, Pierre; Backes, Gunter; Thonar, Cécile; Messmer, Monika.
Plant associated soil microbes are known to play an important role in the expression and stability of certain plant traits such as nutrient use efficiency and disease resistance. Arbuscular mycorrhizal fungi (AMF) form one of the primary mutualistic plant-microbe symbioses. Besides known benefits such as improved nutrient mobilisation (mainly phosphorus and zinc) and tolerance against abiotic stresses (mainly drought), an increasing number of studies highlight a significant role of AMF in the mediation of disease resistances and priming mechanisms. Individual reports have shown enhanced levels of defence-related compounds (such as glucanases, chitinases and phenolics) in mycorrhizal plants, and there is first evidence of certain phytohormone pathways (in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Breeding; Genetics and propagation Crop health; Quality; Protection.
Ano: 2016
URL: http://orgprints.org/30510/1/hohmann-etal-2016-Eucarpia2016_Abstract.pdf

Breeding for yield and quality of maize
Provedor de dados: 106
Autores: Teerasak Manupeerapan; Charas Kitbamroong; Pichet Grudloyma; Somrak Noradechanon; Sompong Tongchuay; Dowroong Khongtein; Supawan Kanla-ong.
18 tables
Palavras-chave: Maize; Corn; Breeding; Genetics; Yield increase; Yield quality; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4497

Breeding potential of S4 maize lines in topcrosses for agronomic and forage traits
Provedor de dados: 1
Autores: Marcondes, Mariana Martins; Faria, Marcos Ventura; Mendes, Marcelo Cruz; Gabriel, Andre; Neiverth, Victor; Zocche, Jean Carlos.
This study aimed to evaluate the performance of 46 maize lines (S4) obtained from crosses between the commercial hybrids Penta x P30F53 in topcrosses with the commercial simple cross hybrid Dow8460 (tester) and checks (hybrids Penta, P30F53, Dow8460 and Status). The grain yield was evaluated in two environments in Guarapuava, Paraná State, and the effects of genotype, environment and genotype x environment interaction were significant. The grain yield of the topcross hybrids ranged from 8,416 to 13,428 kg ha-1. The agronomic characteristics of the forage and the bromatological characteristics of the silage were evaluated in environment 1. The green mass yield of the forage ranged from 48,767 to 87,714 kg ha-1 and the dry mass yield ranged from 14,749 to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agronomia; Fitotecnia; Melhoramento Genético Vegetal Zea mays; Acid detergent fiber; Neutral detergent fiber; Silage; Plant breeding Melhoramento Genético de Milho.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28307

Breeding Quality Protein Maize (QPM): Protocols for Developing QPM Cultivars
Provedor de dados: 31
Autores: Vivek,   B.S.; Krivanek,   A.F.; Palacios-Rojas,   N.; Twumasi-Afriyie,   S.; Diallo,   Alpha O.
This manual is intended for maize breeders who would like to start developing quality protein maize (QPM) cultivars. It is a compilation and consolidation of several breeding protocols successfully used at CIMMYT over two decades of QPM development and breeding. A brief background and the basic theory of QPM genetics are explained, leading up to detailed methods and procedures of QPM development.
Tipo: Report
Palavras-chave: Zea mays; Plant breeding; Breeding methods; Genetic resources; Protein quality; Protein content; Application methods; Lysine; Tryptophan; Food composition; Crop Production/Industries; F30; Q04.
Ano: 2008
URL: http://purl.umn.edu/56179

Breeding strategies for recurrent selection of maize
Provedor de dados: 86
Autores: Viana,José Marcelo Soriano.
The objectives of this work were to analyze theoretical genetic gains of maize due to recurrent selection among full-sib and half-sib families, obtained by Design I, Full-Sib Design and Half-Sib Design, and genotypic variability and gene loss with long term selection. The designs were evaluated by simulation, based on average estimated gains after ten selection cycles. The simulation process was based on seven gene systems with ten genes (with distinct degrees of dominance), three population classes (with different gene frequencies), under three environmental conditions (heritability values), and four selection strategies. Each combination was repeated ten times, amounting to 25, 200 simulations. Full-sib selection is generally more efficient than half-sib...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Design I; Full-sib families; Half-sib families; Tandem selection; Genetic gains.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007001000003

Breves considerações sobre o Vale do Mearim.
Provedor de dados: 14
Autores: SANTOS, A. I. M. dos.
bitstream/item/160786/1/FL00460-.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cultivo; Vale do Mearim; Rio Mearim; Maranhão; Brasil; Economy; Cultivation; Maize; Babassu; Bean; Production.; Algodão; Arroz; Babaçu; Agricultura; Clima; Economia; Feijão; Milho; Produção; Solo.; Agriculture; Climate; Cotton; Rice; Soil.
Ano: 1965
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374427

BRIDGING THE GAP BETWEEN OLD AND NEW TECHNOLOGY: CONSIDERATION OF INDIGENOUS KNOWLEDGE IN MAIZE PESTS MANAGEMENT PRACTICES IN NIGERIA
Provedor de dados: 21
Autores: Meludu, Nkiru T.; Adesina, Jimoh B.
Conventional pests management practices are carried out mainly through extensive exposure to chemicals (pesticides) used in agricultural production. The overall ailing effects of these chemical based products to the environment and human health are some of the challenges which appeal to look for alternative farming practices that would minimize the use of pesticides in agricultural production. It is against this background that this study was carried out to determine the perception of the effectiveness of indigenous and organic maize pest management practices among maize farmers in Oyo state in order to bridge the gap between the old and new technology and determine the relationship that will enhance the development of ecological organic agriculture (EAO)....
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Farming Systems; Technology transfer; Consumer issues.
Ano: 2014
URL: http://orgprints.org/23136/1/23136_MM.pdf

Brief summary of Purdue University quality protein project
Provedor de dados: 106
Autores: Bauman, L.F.
2 tables
Palavras-chave: Corn; Maize; Proteins; Quality; Plant breeding; Purdue University; ข้าวโพด; ข้าวโพดโปรตีนสูง.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3887

Bromatological characterization of maize genotypes for silage - doi: 10.4025/actascianimsci.v34i4.15271
Provedor de dados: 2
Autores: Martin, Thomas Newton; Universidade Federal de Santa Maria; Vieira, Valmir da Cunha; Universidade Tecnológica Federal do Paraná; Menezes, Luis Fernando Glassenap de; Universidade Tecnológica Federal do Paraná; Ortiz, Sidney; Universidade Tecnológica Federal do Paraná; Bertoncelli, Patricia; Universidade Federal de Santa Maria; Storck, Lindolfo; Universidade Federal de Santa Maria.
Since every year public and private companies bring many genotypes of maize to the market, the suitability of these genotypes for the production of silage should be evaluated. Current study evaluates the agronomic and chemical characteristics of early-normal cycle maize genotypes as well as assesses whether the genetic bases (single, double, and triple hybrids, as well as varieties and intervarietal genotypes) and the grain hardness (hard, semi-hard and dentate) modify the indication of maize genotypes for silage. The experiment was conducted at the Universidade Tecnológica Federal do Paraná, campus Dois Vizinhos, Paraná State, Brazil. Thirty-six genotypes were evaluated by a simple lattice design. Grains were harvested at the pasty to farinaceous stage...
Tipo: Pesquisa de campo e análise laboratorial
Palavras-chave: 5.04.03.03-6 genetic bases; Grain hardness; Cultivars indication; Zea mays L. genetic bases; Grain hardness; Cultivars indication; Zea mays L.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/15271

BRS 4150 variedade de milho para a regiao Sul.
Provedor de dados: 14
Autores: SANTOS, M. X. dos; GAMA, E. E. G. e; PARENTONI, S. N.; GUIMARAES, P. E. O.; PACHECO, C. A. P.; WINKLER, E. I.; VIEIRA JUNIOR, P. A.; CORREA, L. A.; MEIRELLES, W. F.
bitstream/item/30331/1/ct-13.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: BRS 4150; Brasil; Sul; South; Maize.; Melhoramento; Milho; Variedade; Zea Mays.; Brazil; Breeding; Varieties.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/482558

Bt protein rhizosecreted from transgenic maize does not accumulate in soil
Provedor de dados: 69
Autores: Margarit,Ezequiel; Reggiardo,Martín I; Permingeat,Hugo R.
The persistence of CryIAb protein rhizosecreted in soil is important in the assessment of its environmental risk. Here we report that CryIAb protein from transgenic maize does not accumulate at high levels in soils. Levels of CryIAb protein rhizosecreted by three maize transgenic events (BT11, MON810 and 176) were studied in hydroponic cultures and found only in the MON810 and BT11 events but not in event 176 or control plants. Under field conditions, the cryIAb gene and a basal level of CryIAb protein was detected in soils from plots cultivated with transgenic and non-transgenic maize, possibly from Bacillus thuringiensis present in the soils.
Tipo: Journal article
Palavras-chave: CryIAb gene; CryIAb protein; ELISA; Genetically modified organisms; PCR; Zea mays (L.).
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000200004

BUILDING ON SUCCESSES IN AFRICAN AGRICULTURE
Provedor de dados: 31
CONTENTS: 1. African Agriculture: Past Performance, Future Imperatives / Steven Haggblade, Peter Hazell, Ingrid Kirsten, and Richard Mkandawire; 2. Generalizing from Past Successes / Steven Haggblade; 3. Recent Growth in African Cassava / Felix Nweke, Steven Haggblade, and Ballard Zulu; 4. Maize Breeding in East and Southern Africa, 1900–2000 / Melinda Smale and T. S. Jayne; 5. Mali’s White Revolution: Smallholder Cotton from 1960 to 2003 / James Tefft; 6. Smallholder Dairy in Kenya / Margaret Ngigi; 7. Are Kenya’s Horticultural Exports a Replicable Success Story? / Nicholas Minot and Margaret Ngigi; 8. Strategies for Sustainable Natural Resource Management / Steven Franzel, Frank Place, Chris Reij, and Gelson Tembo; 9. The Changing Policy Environment...
Tipo: Report
Ano: 2004
URL: http://purl.umn.edu/42996

Business Rationale for Investment on Power Operated Maize Sheller in Bangladesh
Provedor de dados: 111
Autores: Swapan K Roy; Mike Albu; Abdur Rob.
A study was carried out to investigate the investment of a selected agro-machinery power operated Maize Sheller in the course of mechanization of Bangladesh. The analysis considers different types of Maize Sheller, and inter-regional differences in agro-economic factors that influence the business rationale for investment. Maize Shellers are increasingly needed to serve demand from poultry sector because manual shelling is very laborious. Comparing with manual shelling, results indicate that power operated Maize Shellers look like a wise investment (5 – 8 acres for 25% internal rate of return or IRR). However, it makes economic sense to operate shellers at higher capacities, and along with the high capital cost (Tk1 18,000 – 22,000) to save large numbers...
Ano: 1969
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/958

Business transacted during the last session
Provedor de dados: 106
Palavras-chave: Corn; Maize; Production; Development; ข้าวโพด; ธุรกิจข้าวโพด.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3917

Busseola fusca (Fuller), the African Maize Stalk Borer:
Provedor de dados: 30
Autores: K.M.
Palavras-chave: Diapause; Pheromones; Sorghum; Biological interaction; Animal developmental stages; Maize; Cultural control; Millets; Yield losses.
Ano: 1992
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3981

Calculate the risk of wireworm infestation in the field
Provedor de dados: 21
Autores: Dierauer, Hansueli; Weidmann, Gilles; Siegrist, Franziska.
• In spring, with a soil temperature of at least 8 °C, place a pot full of cereal or maize grains into water and allow it soak for 24 hours.  • Spread out the soaked grains on about 20 cardboard or plastic plates, pot traps, stockings with adequate mesh size or similar materials. Sealable containers must have several holes; through which the worms can access the trap.  • Position the traps at a depth of 10 cm with at least 10 to 15 traps per field. The more traps per ha, the more reliable the results. Cover the traps with earth to soil-level and mark the locations.  • After 7 to 10 days, dig out the traps, collect them and count the wireworms.  • If one or more wireworms per trap is found, the field is infested quite strongly: economic losses are to be...
Tipo: Practice tool
Palavras-chave: Crop health; Quality; Protection Root crops.
Ano: 2017
URL: http://orgprints.org/31033/1/PA_029_calculate_risk_wireworms_final_QR.pdf

Calibração do medidor de clorofila Minolta SPAD-502 para uso na cultura do milho.
Provedor de dados: 14
Autores: ZOTARELLI, L.; CARDOSO, E. G.; PICCININ, J. L.; URQUIAGA, S.; BODDEY, R. M.; TORRES, E.; ALVES, B. J. R.
bitstream/CNPAB-2010/28067/1/cot055.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Calibração; Maize.; Clorofila; Fotossíntese; Medição; Milho; Pigmento.; Calibration; Pigments.; Photosynthesis.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/624249

Calibrated heat-pulse method for the assessment of maize water uptake
Provedor de dados: 63
Autores: Santos,Antonio Odair; Bergamaschi,Homero; Rosa,Luiz Mauro G.; Bergonci,João Ito.
Plant water requirements are important aspects of crop production to be determined in the field, in order to judiciously manage crop water usage. Water uptake by field grown maize (Zea mays L.), under well-watered conditions was verified with the heat-pulse system. The temperature difference between two radially inserted thermocouples, one 9 mm above and the other 4 mm below a heater piercing the maize stem, was measured every 0.3 seconds following emission of a heat-pulse. Comparisons of the heat-pulse system outputs, lysimetric measurement and transpiration model estimates were monitored on an hourly and daily basis. At normal and low atmospheric demand daily and hourly values of heat-pulse outputs and lysimetric measurement showed good agreement. Hourly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sap flow; Transpiration; Heat-pulse.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000100006

Calibrating and validating AquaCrop model for maize crop in Northern zone of Nigeria
Provedor de dados: 111
Autores: Ezekiel, Oiganji; Igbadun, H. E.; Mudiare, O.J.; Oyebode, M.A.
Farmers in the northern Guinea Savannah ecological zone of Nigeria have been experiencing declining crop yield due to erratic water supply. In recent times, research on better water management and interaction between effects of climate, soil and field management on crop production is fast gaining grounds with the use of models. Models can be used to predict the impact of long-term climate variability, thus providing an opportunity of better techniques compared with the traditional multi-location trials. This study presents the calibration and validation of AquaCrop model for drip irrigated maize (Zea mays). Calibration was done using data of 2013, while validation across seasons was done with data of 2014. The modelling efficiency of grain yield, biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering/ soil and water conservation engineering growth stage; Deficit irrigation; Drip irrigation; Water management; Modelling.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3755

Calidad física y fisiológica en semillas de híbridos de maíz de los valles altos centrales de México y su relación con el establecimiento en campo.
Provedor de dados: 32
Autores: Bustamante Zepeda, Jimena E.
La calidad de las semillas es un elemento de suma importancia para los productores, por tal motivo las pruebas de calidad física y fisiológica son primordiales para estimar eficacia. En el presente estudio se efectuaron dichas pruebas en semillas de 18 híbridos comerciales de maíz de los Valles Altos Centrales de México. Se utilizaron el laboratorio y almaciguero del programa de semillas del Colegio de Postgraduados, además de cuatro localidades del Estado de México. En laboratorio se midieron las variables: porcentaje de germinación al primer conteo, contenido de humedad, peso volumétrico, análisis de pureza, condición del pedicelo, peso de mil semillas y se reclasificó a la semilla en seis tamaños. En almaciguero se sembró semilla en dos condiciones...
Palavras-chave: Calidad; Emergencia; Establecimiento; Germinación; Vigor; Quality; Emergence; Establishment; Germination; Vigor; Maestría; Producción de semillas.
Ano: 2010
URL: http://hdl.handle.net/10521/215

Calidad física y fisiológica en semillas de híbridos de maíz de los valles altos centrales de México y su relación con el establecimiento en campo.
Provedor de dados: 32
Autores: Bustamante Zepeda, Jimena E.
La calidad de las semillas es un elemento de suma importancia para los productores, por tal motivo las pruebas de calidad física y fisiológica son primordiales para estimar eficacia. En el presente estudio se efectuaron dichas pruebas en semillas de 18 híbridos comerciales de maíz de los Valles Altos Centrales de México. Se utilizaron el laboratorio y almaciguero del programa de semillas del Colegio de Postgraduados, además de cuatro localidades del Estado de México. En laboratorio se midieron las variables: porcentaje de germinación al primer conteo, contenido de humedad, peso volumétrico, análisis de pureza, condición del pedicelo, peso de mil semillas y se reclasificó a la semilla en seis tamaños. En almaciguero se sembró semilla en dos condiciones...
Palavras-chave: Calidad; Emergencia; Establecimiento; Germinación; Vigor; Quality; Emergence; Establishment; Germination; Vigor; Maestría; Producción de semillas.
Ano: 2010
URL: http://hdl.handle.net/10521/215

CAMPANHA nacional: produção de sementes de milho variedade em comunidades rurais: cartilha do produtor.
Provedor de dados: 14
Uma variedade de milho é um conjunto de plantas com características comuns, sendo um material geneticamente estável. Por essa razão, o agricultor pode reutilizar a semente colhida sem nenhuma perda na produtividade. Tal fato não ocorre quando o agricultor reutiliza sementes colhidas de um híbrido plantado no ano anterior. Nesse caso, há uma queda mínima na produtividade de 20% . Isso se deve à perda do "vigor híbrido. " Esta publicação tem como objetivo orientar a produção de sementes de milho variedade em comunidades rurais. Seguindo essas instruções, os produtores terão sementes melhores, mais produtivas e não precisarão todo ano adquirir novas sementes de milho.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Maize; Variety; Seed; Production; Rural community.; Comunidade Rural; Milho; Produção; Semente; Variedade.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/482124

CAN AGRICULTURAL PRODUCTION IN THE MARGINAL LANDS CONTRIBUTE TO IMPROVING FOOD SECURITY IN THE SAHELIAN AFRICAN COUNTRIES: AN EVIDENCE FROM THE BAS-FOND RICE PRODUCTION IN MALI
Provedor de dados: 31
Autores: Dimithe,   Georges; Bernsten,   Richard H.; Staatz,   John M.; Sanogo,   Ousmane; Coulibaly,   B.S.; Simpara,   M.
To improve national food security, successive Mali governments have always focused on expanding and intensifying production in the government-managed irrigation schemes (Office du Niger), which account for about 50% of domestic rice production.  Because the cost of expanding and  rehabilitating those schemes is high, the government is looking for complementary cost-effective ways to achieve this goal.  The government could increase domestic rice supply by investing in improving the farmer-managed inland valley swamps.  Although the government has paid little attention to those marginal lands, farmers have been growing rice in these areas using traditional technologies.  This paper used data from a survey of 334 bas-fond farmers and secondary data to...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Food Security and Poverty; Land Economics/Use.
Ano: 2000
URL: http://purl.umn.edu/11669

Can an increase in nitrogen rate mitigate damages caused by uneven spatial distribution of maize plants at the sowing row?
Provedor de dados: 1
Autores: Kolling, Daniel Fernando; Sangoi, Luís; Leolato, Lucieli Santini; Panison, Fernando; Coelho, Antonio Eduardo; Kuneski, Hugo François.
An uneven distribution of maize plants at the sowing row can decrease grain yield. This work was carried out to evaluate the effect of an increasing nitrogen rate on maize agronomic performance under different variation coefficients of plant spatial distributions at the sowing row. The experiment was conducted in Lages, Santa Catarina State, South Brazil. Three variation coefficients (VC) of plant spatial distribution (0, 50, and 100%) were tested. At the 0 level, seeds were evenly distributed 17 cm from each other. In the other treatments with uneven spatial distributions, the distances between two neighbouring seeds ranged from 2 to 54 cm. Four nitrogen side-dress rates (0, 125, 250, and 375 kgN ha-1) were evaluated. The increase in VC of plant spatial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Spatial variability; Nitrogen side-dress; Grain yield.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39874

Can an increase in nitrogen rate mitigate damages caused by uneven spatial distribution of maize plants at the sowing row?
Provedor de dados: 1
Autores: Kolling, Daniel Fernando; Sangoi, Luís; Leolato, Lucieli Santini; Panison, Fernando; Coelho, Antonio Eduardo; Kuneski, Hugo François.
An uneven distribution of maize plants at the sowing row can decrease grain yield. This work was carried out to evaluate the effect of an increasing nitrogen rate on maize agronomic performance under different variation coefficients of plant spatial distributions at the sowing row. The experiment was conducted in Lages, Santa Catarina State, South Brazil. Three variation coefficients (VC) of plant spatial distribution (0, 50, and 100%) were tested. At the 0 level, seeds were evenly distributed 17 cm from each other. In the other treatments with uneven spatial distributions, the distances between two neighbouring seeds ranged from 2 to 54 cm. Four nitrogen side-dress rates (0, 125, 250, and 375 kgN ha-1) were evaluated. The increase in VC of plant spatial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Spatial variability; Nitrogen side-dress; Grain yield.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39874

Can Bt Maize Reduce Exposure to the Mycotoxin Fumonisin in South Africa?
Provedor de dados: 31
Autores: Pray,   Carl E.; Rheeder,   John; Gouse,   Marnus; Volkwyn,   Yvette; van der Westhuizen,   Liana; Shephard,   Gordon.
The mycotoxin fumonisin is associated with oesophageal cancer and birth defects. The Eastern Cape province of South Africa has high levels of fumonisin in maize and oesophageal cancer. This study measures the amounts of the mycotoxin fumonisin in the grain of Bt maize, commercial hybrids, and farmer-saved, local mixtures of seed that were produced and stored by small holders in South Africa.  We find that adoption of Bt maize can reduce poor rural consumers exposure to fumonisin.  Greater consumption of maize meal milled in modern mills could have a similar impact.
Tipo: Conference Paper or Presentation
Palavras-chave: Bt maize; Mycotoxins; Fumonisin; South Africa; Agricultural and Food Policy; Health Economics and Policy; International Development.
Ano: 2009
URL: http://purl.umn.edu/51739

CAN DOSING MECHANISMS AFFECT THE PHYSICAL QUALITY OF CORN SEEDS AT DIFFERENT SEEDING SPEEDS?
Provedor de dados: 196
Autores: Parizotto, Nayara Francieli; Carpes Marques Filho, Aldir; Munhoz  Venâncio de Oliveira, Marcelo; Pereira de Souza, Flavia Luize; Arbex Silva, Paulo Roberto.
Corn (Zea mays L.) is one of the main commodities of Brazilian agribusiness, however, the sowing operation of this crop still presents challenges related to the performance of the metering mechanisms and operational speed, since these can affect the physical quality of the seeds and impair germination. The aim of this study was to evaluate the physical quality of maize seeds as a function of different metering mechanisms and operational speeds in a controlled sowing trial. The experiment was carried out at the State University, UNESP/Botucatu-SP, using five commercial models of seed dosers at four operational sowing speeds. The results showed that the metering model and the operational speed directly affected the physical quality of the corn seeds,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plantability; Mechanical damage; Distribution systems; Seeding; Plantabilidade; Dano mecânico; Sistemas de distribuição; Semeadura.
Ano: 2022
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6823

Can higher legume diversity reduce clover soil fatigue?
Provedor de dados: 21
Autores: Søegaard, Karen; Møller, Kaare.
White clover soil fatigue is an increasing problem in Danish organic dairy farms. The clover cyst nematode (Heterodera trifolii) has been found to play a major role in the problem. Grassland legume species less readily attacked by H. trifolii and less favourable for its reproduction than white clover may offer possibilities for relieving the soil fatigue.    In 2005, screenings were made of nine grass-land legume species / varieties in a field with a rather high level of H. trifolii infestation, pre-cropped with grass/white clover, and in a field with a low infesta-tion level, pre-cropped with maize.    The species grouped in two: 1) White, red, alsike and kura clovers and lucerne had medium to high percentages of nematode attacks and numbers of nematodes...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology.
Ano: 2006
URL: http://orgprints.org/7542/1/Karen_Soegaard.rtf

Can Technology Deliver on the Yield Challenge to 2050?
Provedor de dados: 31
Autores: Fischer,   R.A.; Byerlee,   Derek R.; Edmeades,   Gregory O.
This paper was produced for the FAO Expert Meeting on How to Feed the World in 2050 (Rome, 24-26 June 2009).
Tipo: Conference Paper or Presentation
Palavras-chave: Technology; Productivity; Yield gaps; Investment in R&amp;D; Biotechnology; Input efficiency; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009
URL: http://purl.umn.edu/55481

Canned baby corn pickle from waste : KIMCHI
Provedor de dados: 106
Autores: Kulvadee Trongpanich; Rasamee Supasri; Kanchanich Vajanavinich.
3 ill., 13 tables
Palavras-chave: Corn; Maize; Baby corn; Corn pickle; Kimchi; ข้าวโพด; ข้าวโพดฝักอ่อน; กิมจิ.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4378

Canonical correlation for morphoagronomic and bromatological traits in silage corn genotypes
Provedor de dados: 53
Autores: Crevelari,Jocarla Ambrosim; Durães,Nayara Norrene Lacerda; Santos,Paulo Ricardo dos; Azevedo,Flávio Henrique Vidal; Bendia,Laila Cecília Ramos; Preisigke,Sandra da Costa; Gonçalves,Gabriel Moreno Bernardo; Ferreira Junior,José Arantes; Pereira,Messias Gonzaga.
ABSTRACT The aim of this study is to assess whether there is linear dependence between groups of morphoagronomic and bromatological traits in hybrid silage corn. Nineteen topcross hybrids and five checks were assessed in two different environments in Campos dos Goytacazes and Itaocara counties, Rio de Janeiro State, during the growing seasons 2013/2014. The study followed a randomized blocks design with four replicates. The phenotypic and canonical correlations between the groups of seven morphoagronomic and five bromatological traits were assessed. There is linear dependence between the group pairs of morphoagronomic, and bromatological variables. The morphoagronomic trait green mass yield can be adopted in indirect selection processes to indicate the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Topcross; Tester; Multicollinearity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300337

Captação de água de chuva para cultivos de milho e feijão caupi.
Provedor de dados: 14
Autores: ANJOS, J. B. dos; BRITO, L. T. de L.
bitstream/CPATSA/6705/1/INT13.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cultivo; Captação de água; Maize; Cowpea; Cultivation.; Milho; Chuva; Feijão de Corda; Zea Mays.; Vigna Unguiculata; Harvesting; Rain; Water.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131479

Características agronômicas de variedades de milho para produção de silagem - doi: 10.4025/actascianimsci.v32i4.9299
Provedor de dados: 2
Autores: Santos, Rafael Dantas dos; Embrapa; Pereira, Luiz Gustavo Ribeiro; Embrapa; Neves, André Luis Alves; Embrapa; Azevêdo, José Augusto Gomes; Universidade Estadual de Santa Cruz; Moraes, Salete Alves de; Embrapa; Costa, Cleber Thiago Ferreira; UNIVASF.
O objetivo deste trabalho foi avaliar a produtividade de massa seca e massa verde, altura de inserção da espiga, número de espigas por planta, altura das plantas e a relação espiga, colmo e folha de seis variedades de milho indicadas para a região semiárida brasileira (BR 5033 - Asa Branca, BR 5028 - São Francisco, BRS 4103, BRS Caatingueiro, BRS Assum Preto e Gurutuba), visando à produção de silagem. O experimento foi conduzido nas dependências da Embrapa Semiárido, adotando-se o delineamento experimental de blocos casualizados com seis tratamentos e quatro repetições. As variedades Gurutuba e BRS 4103 obtiveram as maiores produtividades de massa verde (38,7 e 40,0 t ha-1). Do mesmo modo, essas duas variedades e a BR 5028 - São Francisco se destacaram...
Tipo: Pesquisa de campo
Palavras-chave: 5.04.00.00-2; 5.04.03.00-1; 5.04.04.00-8; 5.07.03.02-1 Forragem; Matéria seca; Nutrição; Ruminantes; Zea mays Pastagem e Forragicultura Forage; Dry matter  nutrition  ruminants  Zea mays.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/9299

Características agronômicas e bromatológicas de vinte genótipos de milho (Zea mays L.) para silagem na região leste paranaense - DOI: 10.4025/actascianimsci.v27i2.1220
Provedor de dados: 2
Autores: Jaremtchuk, Ana Regina; UNESP; Jaremtchuk, Carla Cristina; UEM; Baglioli, Barbara; PUC/PR; Medrado, Marcio Testa; PUC/PR; Kozlowski, Luiz Alberto; PUC/PR; Costa, Ciniro; UNESP; Madeira, Humberto Maciel França; PUC/PR.
O presente experimento teve por objetivo avaliar as características  agronômicas e a composição químico-bromatológica de vinte genótipos de milho para ensilagem. O delineamento experimental utilizado foi inteiramente casualizado, com 3 repetições. Os híbridos foram colhidos no estádio ⅓ da linha do leite em duas alturas de corte: imediatamente acima das folhas senescentes (planta inteira) e imediatamente abaixo da inserção da espiga (meia planta), ensilados em silos de PVC por 50 dias. Após abertura dos silos, foram realizadas determinações de MS, PB, EE, FDA, FDN, cinzas e estimativa de NDT. O teor de MS oscilou entre 26,56 e 32,19 e entre 29,53 e 36,08 para planta inteira e meia planta, respectivamente. O teor de PB apresentou alta variação entre os...
Palavras-chave: 5.04.04.00-8 Pastagem e Forragicultura milho; Híbridos; Silagem; Ensaio de cultivares 5.04.04.00-8 Pastagem e Forragicultura.
Ano: 2005
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/1220

Características agronômicas e qualidade comercial de cultivares de milho pipoca em alta população - DOI: 10.4025/actasciagron.v31i2.452
Provedor de dados: 1
Autores: Leonello, Luiz Augusto Fumagalli; UNESP; Cazetta, Disnei Amélio; UNESP; Fornasieri Filho, Domingos; UNESP.
Com o objetivo de identificar cultivares de milho pipoca que se constituam em alternativa viável aos produtores foi conduzido um experimento em delineamento experimental de blocos casualizados, com cinco genótipos de milho pipoca (BRS Ângela, Zélia, IAC 112, IAC 12 e IAC TC-01) e quatro repetições, na safra 2003/2004. O experimento foi instalado em espaçamento entre as linhas de 60 cm, com densidade populacional de 75 mil plantas por hectare. No decorrer do experimento, foram avaliadas características agronômicas e comerciais em condição de campo e de laboratório. A variedade BRS Ângela apresentou maior produtividade, seguida pelos híbridos simples IAC, com Zélia (híbrido triplo) apresentando menor produtividade. O híbrido simples IAC 12 apresentou pior...
Palavras-chave: 5.01.00.00-9 Agronomia Zea mays L.; Capacidade de expansão; Componentes produtivos Zea mays L.; Popping expansion; Yield components.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/452

Caracterização de um isolado do Sugarcane mosaic virus que quebra a resistência de variedades comerciais de cana-de-açúcar
Provedor de dados: 102
Autores: Gonçalves,Marcos C.; Santos,Amaury S.; Maia,Ivan G.; Chagas,César M.; Harakava,Ricardo.
Os vírus pertencentes ao subgrupo do Sugarcane mosaic virus (SCMV, gênero Potyvirus, família Potyviridae) infectam e causam mosaico em diferentes espécies botânicas da subfamília Panicoideae (família Poaceae), porém apenas o SCMV e o Sorghum mosaic virus (SrMV) infectam naturalmente cana-de-açúcar. No Brasil, a espécie SCMV parece ser o único agente causal da doença. Embora a maioria das variedades comerciais de cana-de-açúcar seja considerada resistente ou tolerante ao SCMV, relatos de incidência de mosaico em tais variedades têm ocorrido no campo. Amostras com sintomas, de diversos clones e variedades, foram coletadas em campos experimentais e comerciais de cana-de-açúcar. Dentre as variedades, a RB72-454, uma das mais plantadas no país e considerada...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Potyviridae; Mosaico da cana; Sugarcane mosaic virus subgroup.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582007000100004

Caracterização e quantificação de Benzoxazolinona (BOA) em extratos de plantas de milho (Zea mays L.) - DOI: 10.4025/actasciagron.v29i3.273
Provedor de dados: 1
Autores: Alves, Luis Wagner Rodrigues; UFLA; Cardoso, Maria das Graças; UFLA; Muniz, Fabiana Rezende; UFLA; Salgado, Ana Paula Soares Pinto; UFLA; Souza, Itamar Ferreira de; UFLA; Nelson, David Lee; UFMG.
Em função da interferência do milho em outras plantas, objetivou-se verificar a presença e a concentração de benzoxazolinona no milho por meio de extração aquosa obtida de material vegetal das cultivares AG-1051, C-333 e C-435. A massa fresca das amostras foi colocada em água destilada e deixada em repouso durante quatro horas. O extrato foi filtrado e particionado em solventes com diferentes polaridades. O extrato etéreo desidratado foi filtrado, concentrado em evaporador rotatório e levado à estufa. Este foi purificado por cromatografia de camada delgada. Recristalizou-se em hexano, e os cristais obtidos foram submetidos à análise em espectrometria no Infravermelho. As bandas presentes no produto padrão também foram caracterizadas nas amostras das...
Palavras-chave: 5.01.02.00-1    Fitossanidade Benzoxazolinona; Alelopatia; Zea mays L.
Ano: 2007
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/273

Caracterização morfológica de espécies de Hemerobius Linnaeus, 1758 (Neuroptera, Hemerobiidae) associadas a cultivos de café (Coffea arabica L.), milho (Zea mays L.) e erva-mate (Ilex paraguariensis St. Hill.)
Provedor de dados: 92
Autores: Lara,Rogéria Inês Rosa; Freitas,Sérgio de.
The predators were collected in mate crop in Cascavel and São Mateus do Sul, Paraná, Brazil and some other additional specimens in coffee and maize crops in Ribeirão Preto, São Paulo, Brazil. Illustrations obtained by SEM are given by the first time to the principal structures. Three species of Hemerobius were identified: H. bolivari Banks, 1910; H. domingensis Banks, 1941 and H. gaitoi Monserrat, 1996. H. domingensis is recorded for the first time to Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Hemerobiidae; Hemerobiinae; Morphology.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000300011

Caracterización agronómica y aptitud combinatoria de poblaciones de maíz del sureste del Estado de México.
Provedor de dados: 32
Autores: Arce Ramírez, Aurelio Chico.
El propósito de esta investigación fue contribuir a la detección de materiales genéticos adecuados de partida para el mejoramiento genético de maíz (Zea mays L) de grano blanco y blanco cremoso para el Sureste del Estado de México, así como definir el método de mejoramiento genético a seguir en las mismas. Para ello, se realizaron dos estudios; en el primero se evaluó el peso seco de grano por planta (PSG/PP), componentes del rendimiento, y características agronómicas de 110 materiales genéticos, mientras que en el segundo se estimaron los efectos de aptitud combinatoria general (gi) (ACG) y específica (sij)(ACE) del PSG/PP de 10 poblaciones sobresalientes y de sus 45 cruzas simples posibles, respectivamente, mediante el Método 2 de Griffing. En ambos...
Palavras-chave: Zea mays L.; Aptitud combinatoria; Cruzas dialélicas; Poblaciones nativas; Premejoramiento; Rendimiento; Combining ability; Diallel crosses; Native populations; Yield; Genética; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2038

Caracterización agronómica y denominación de poblaciones locales de maíz (Zea mays L.) de la comunidad de Cualac, Guerrero.
Provedor de dados: 32
Autores: Jiménez Tapia, Silvino.
La mayoría de la superficie agrícola en Cualac, estado de Guerrero, es sembrada con poblaciones locales de maíz, las cuales, hasta el momento no han sido caracterizadas a nivel de comunidad. El objetivo del presente trabajo, fue  colectar muestras representativas de la diversidad de maíz de la comunidad de Cualac y su caracterización agronómica. En 2007, se evaluaron 25 genotipos, 23 fueron poblaciones de Cualac y dos tipos mejorados, el H-507 y VS-535. Se utilizó un diseño de látice 5 x 5, con cuatro repeticiones. Los caracteres evaluados, mostraron diferencias entre poblaciones (p&lt;0.05), lo que muestra riqueza en diversidad. En rendimiento de grano, existen poblaciones nativas que igualan (P&lt;0.05) a los materiales comerciales recomendados para la...
Palavras-chave: Zea mays; Poblaciones locales; Diversidad genética; Color de grano; Local populations; Genetic diversity; Grain color; EDAR; Desarrollo Sostenible de Zonas Indígenas; Maestría Tecnológica.
Ano: 2010
URL: http://hdl.handle.net/10521/304

Caracterización biológica y molecular del Tomato spotted wilt virus (TSWV) en aislamientos mexicanos.
Provedor de dados: 32
Autores: González Pacheco, Blanca Estela.
El Tomato spotted wilt virus (TSWV, género Tospovirus, familia Bunyaviridae) se transmite por trips de manera persistente  y  se encuentra distribuido alrededor del mundo causando graves pérdidas económicas en diversos cultivos. El TSWV tiene genoma tripartita de ARN con las siguientes características principales: el segmento largo (L) es de polaridad negativa y codifica para la polimerasa RNA dependiente (RdRP); el segmento mediano (M) codifica las glicoproteínas Gn y Gc que forman parte de la cápside y NSm involucrada en el movimiento viral; y el segmento pequeño (S) codifica las nucleoproteínas NSs implicadas en la actividad supresora del silenciamiento genético. En México, el TSWV ha causado grandes pérdidas en cultivos ornamentales y hortícolas, de...
Palavras-chave: Tospovirus; TSWV; Marchitez manchada; Aislamientos; Tospoviruses; Spotted wilt; Isolates; Fitopatología; Doctorado.
Ano: 2014
URL: http://hdl.handle.net/10521/2271

Caracterización de tipos de maíz criollo y sistemas de cultivo : estudio de caso en tres comunidades de la Costa Chica de Guerrero
Provedor de dados: 32
Autores: Hernández Flores, Martín.
La investigación ha privilegiado la identificación y caracterización de un bien histórico de gran importancia patrimonial y valor presente, que se manifiesta como factor fundamental a través de un conjunto de poblaciones de maíces nativos -conocidos localmente como criollos-, al interior de una amplia diversidad y multifuncionalidad de sistemas productivos, en la región de la Costa Chica de Guerrero. La tendencia de la modernización de la agricultura durante los últimos años, demuestra que en la región se ha excluido sistemáticamente el valor presente de los recursos locales, los cuales indudablemente forman parte de las lógicas de funcionamiento de los sistemas de producción campesinos e indígenas. En particular, ha sido y es notorio el desinterés...
Tipo: Tesis
Palavras-chave: Tipos de maíz criollo; Sistemas de cultivo; Caracterización; Maestría; Desarrollo Rural; Types of creole maize; Systems of culture; Characterization.
Ano: 2007
URL: http://hdl.handle.net/10521/1557

Caracterización del consumo de tortilla en el Estado de México.
Provedor de dados: 32
Autores: Espejel García, María Vianey.
La tortilla es considerada el alimento principal de los mexicanos, provee energía por su contenido alto de carbohidratos y aporta calcio, potasio, fósforo, fibra, proteínas y algunas vitaminas, como A, tiamina, riboflabina y niacina. El objetivo del presente estudio fue caracterizar a los consumidores de tortilla del Estado de México para identificar el tipo y características del producto que demandan y cuantificar la correlación de estos aspectos con los niveles de ingreso y consumo. La metodología consistió del algoritmo CHAID (Chi-squared Automatic Interaction Detection) y pruebas de asociación mediante la distribución X², segmentando las variables cuantitativas y categóricas de carácter económico y social; también se estimó un modelo de regresión...
Palavras-chave: Algoritmo CHAID; Regresión ordinal; Tortilla; Consumidor; Estado de México; Economía; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1821

Caracterización, rendimiento de maíces nativos y descripción de las unidades de producción en el Municipio de Molcaxac, Pue.
Provedor de dados: 32
Autores: Angeles Gaspar, Elizabeth.
El maíz (Zea mays L.) en México es importante social, cultural y económicamente. En el municipio de Molcaxac, Pue. la mayor parte de los productores utilizan poblaciones locales de maíz. Sin embargo, no existen estudios en la zona que describan la diversidad y potencial de las poblaciones locales de maíz, y las condiciones socioeconómicas en que se da la producción de este grano. La presente tesis se dividió en dos partes. La primera  tuvo como objetivos evaluar el rendimiento de grano y caracterizar agronómicamente la diversidad de las poblaciones locales de maíz existentes en el municipio de Molcaxac. La segunda parte tuvo como objetivo realizar una descripción general de las principales características de los productores de maíz, así como de su unidad...
Palavras-chave: Zea mays L.; Poblaciones locales; Diversidad genética; Sistmemas de producción; Local populations; Genetic diversity; Production systems; Maestría; Estrategías para el Desarrollo Agrícola Regional; EDAR.
Ano: 2010
URL: http://hdl.handle.net/10521/177

Caracterización, rendimiento de maíces nativos y descripción de las unidades de producción en el Municipio de Molcaxac, Pue.
Provedor de dados: 32
Autores: Ángeles Gaspar, Elizabeth.
El maíz (Zea mays L.) en México es importante social, cultural y económicamente. En el municipio de Molcaxac, Pue. la mayor parte de los productores utilizan poblaciones locales de maíz. Sin embargo, no existen estudios en la zona que describan la diversidad y potencial de las poblaciones locales de maíz, y las condiciones socioeconómicas en que se da la producción de este grano. La presente tesis se dividió en dos partes. La primera  tuvo como objetivos evaluar el rendimiento de grano y caracterizar agronómicamente la diversidad de las poblaciones locales de maíz existentes en el municipio de Molcaxac. La segunda parte tuvo como objetivo realizar una descripción general de las principales características de los productores de maíz, así como de su unidad...
Palavras-chave: Zea mays L.; Poblaciones locales; Diversidad genética; Sistmemas de producción; Local populations; Genetic diversity; Production systems; Maestría; Estrategías para el Desarrollo Agrícola Regional; EDAR.
Ano: 2010
URL: http://hdl.handle.net/10521/177

Caracterización socioeconómica, morfológica y bioquímica de una muestra etnográfica de maíz (Zea mays L.) raza bolita.
Provedor de dados: 32
Autores: Ramírez Jaspeado, Araceli.
El maíz es el cultivo más importante de México cuya superficie de siembra es de 8 millones de hectáreas con un rendimiento promedio de 3 ton/ha. Su aprovechamiento involucra los granos, tallos, espigas, raíces, olote y brácteas (“hoja para tamal”) utilizados para diversos propósitos en la alimentación humana, animal, medicinal e industrial. Se ha considerado que la principal forma de consumo del maíz es a través de la tortilla, donde, alrededor de 12.3 millones de toneladas de maíz se consumen en esta forma. En este sentido, los maíces mejorados han sido esenciales para dicho propósito, sin embargo, el uso de los maíces nativos o criollos, también ha sido de gran importancia ya que son un reservorio de la variabilidad genética y han sido la base de la...
Palavras-chave: Caracterización; Raza Bolita; Tlayuda; Cadena de valor; Calidad nutricional; Proteínas transgénicas; Conservación; Producción de semillas; Doctorado; Characterization; Bolita race; Value chain; Nutritional quality; Transgenic proteins; Conservation.
Ano: 2012
URL: http://hdl.handle.net/10521/1822

Carbon balance and crop residue management in dynamic equilibrium under a no-till system in Campos Gerais
Provedor de dados: 90
Autores: Ferreira,Ademir de Oliveira; Sá,João Carlos de Moraes; Harms,Mônica Gabrielle; Miara,Simone; Briedis,Clever; Quadros Netto,Caio; Santos,Josiane Burkner dos; Canalli,Lutécia Beatriz.
The adoption of no-tillage systems (NT) and the maintenance of crop residues on the soil surface result in the long-term increase of carbon (C) in the system, promoting C sequestration and reducing C-CO2 emissions to the atmosphere. The purpose of this study was to evaluate the C sequestration rate and the minimum amount of crop residues required to maintain the dynamic C equilibrium (dC/dt = 0) of two soils (Typic Hapludox) with different textural classes. The experiment was arranged in a 2 x 2 x 2 randomized block factorial design. The following factors were analyzed: (a) two soil types: Typic Hapludox (Oxisol) with medium texture (LVTM) and Oxisol with clay texture (LVTA), (b) two sampling layers (0-5 and 5-20 cm), and (c) two sampling periods (P1 -...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C sequestration rate; Soil texture; Subtropical soils.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500022

Carbon indices to assess quality of management systems in a Subtropical Acrisol
Provedor de dados: 63
Autores: Zanatta,Josiléia Acordi; Vieira,Frederico Costa Beber; Briedis,Clever; Dieckow,Jeferson; Bayer,Cimélio.
ABSTRACT: Management systems to improve soil quality are essential for agricultural and environmental sustainability. We assessed the quality of soil management systems applied to a subtropical Acrisol in terms of the carbon management index (CMI), the stratification ratio for total organic carbon (SR-TOC) and light fraction of organic matter (SR-LF). In addition, we examined their relationship to chemical, physical and biological soil quality indicators, as well as to maize yield. The study was conducted on a long-term experiment (18 years) in southern Brazil involving two different systems [no tillage (NT) and conventional tillage (CT)], two cropping systems [black oat/maize (O/M) and black oat + vetch/maize + cowpea (OV/MC)] and two nitrogen fertilizer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation agriculture; Cropping systems; No-till; Quality indicators.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001600501

Carbon, light organic matter and oxidizable organic fractions in alley cropping system
Provedor de dados: 190
Autores: Guareschi, Roni Fernandes; Pereira, Marcos Gervasio.
The objective of this study was to evaluate the levels of total organic carbon (TOC) of the soil, light organic matter (LOM) in water and oxidizable fractions of organic carbon in a cultivated area of maize in the alleys Flemingia macrophylla under different managements of their shoot. The study area is located in “Agroecological Fazendinha in Seropédica city, Rio de Janeiro, Brazil. The experimental design was randomized blocks with three treatments and eight replications, consisting of the following treatments: control (corn cultivation with no alleys); cultivation of maize in alley cropping with pruning to 0,6 m high and growing maize in alley cropping system without pruning. In each area composite samples were collected at 0-5 cm. The presence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Labile carbon; Pruning system; Flemingia macrophylla Carbono lábil; Sistema de poda; Flemingia macrophylla.
Ano: 2013
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/450

Carbon sequestration and greenhouse gases emissions in soil under sewage sludge residual effects
Provedor de dados: 63
Autores: Pitombo,Leonardo Machado; Carmo,Janaina Braga do; Maria,Isabela Clerici de; Andrade,Cristiano Alberto de.
The large volume of sewage sludge (SS) generated with high carbon (C) and nutrient content suggests that its agricultural use may represent an important alternative to soil carbon sequestration and provides a potential substitute for synthetic fertilizers. However, emissions of CH4 and N2O could neutralize benefits with increases in soil C or saving fertilizer production because these gases have a Global Warming Potential (GWP) 25 and 298 times greater than CO2, respectively. Thus, this study aimed to determine C and N content as well as greenhouse gases (GHG) fluxes from soils historically amended with SS. Sewage sludge was applied between 2001 and 2007, and maize (Zea mays L.) was sowed in every year between 2001 and 2009. We evaluated three treatments:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosolid; Nitrogen; Carbon dioxide; Methane; Nitrous oxide.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000200147

Carbono total e atributos químicos com diferentes usos do solo no Cerrado - DOI: 10.4025/actasciagron.v31i4.792
Provedor de dados: 1
Autores: Siqueira Neto, Marcos; USP; Piccolo, Marisa de Cássia; Centro de Energia Nuclear na Agricultura (CENA/USP); Scopel, Eric; EMBRAPA; Costa Junior, Ciniro; Centro de Energia Nuclear na Agricultura (CENA/USP); Cerri, Carlos Clemente; USP; Bernoux, Martial; Institut de Recherche pour le Development.
A região do Cerrado representa uma das maiores áreas cultivada do mundo. Os diferentes usos do solo empregados nesta região podem modificar efetivamente as quantidades de matéria orgânica e alterar a ciclagem dos nutrientes no solo. O objetivo deste estudo foi avaliar o efeito de diferentes sistemas de manejo nas relações entre o carbono total e os atributos químicos de um Latossolo Vermelho distrófico no Cerrado na região de Rio Verde, Estado de Goiás. As áreas estudadas foram cerradão, pastagem de baixa produtividade, plantio convencional de soja e plantio direto de soja com milho em sucessão. Os valores mais baixos no pH, cátions trocáveis, P-disponível e enxofre foram observados no Cerradão, contudo foram encontrados os maiores teores de C-total, que...
Palavras-chave: 5.02.01.07-7    Solos Florestais fertilidade do solo; Plantio direto; Plantio convencional; Pastagem; Soja Manejo e Conservação do Solo soil fertility; No-tillage; Conventional tillage; Pasture; Soybean.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/792

Cargill Seed Ltd.
Provedor de dados: 106
Autores: Banpote Tasanasuwan.
Palavras-chave: Corn; Maize; CARGILL SEEDS CO.LTD; Seed production; ข้าวโพด; บริษัทคาร์กิลล์ เมล็ดพันธุ์จำกัด; พันธุ์ลูกผสม.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4036

CAROTENOID RETENTION IN MINIMALLY PROCESSED BIOFORTIFIED GREEN CORN STORED UNDER RETAIL MARKETING CONDITIONS
Provedor de dados: 64
Autores: Barbosa,Natália Alves; Paes,Maria Cristina Dias; Guimarães,Paulo Evaristo de Oliveira; Pereira,Joelma.
Storing processed food products can cause alterations in their chemical compositions. Thus, the objective of this study was to evaluate carotenoid retention in the kernels of minimally processed normal and vitamin A precursor (proVA)-biofortified green corn ears that were packaged in polystyrene trays covered with commercial film or in multilayered polynylon packaging material and were stored. Throughout the storage period, the carotenoids were extracted from the corn kernels using organic solvents and were quantified using HPLC. A completely factorial design including three factors (cultivar, packaging and storage period) was applied for analysis. The green kernels of maize cultivars BRS1030 and BRS4104 exhibited similar carotenoid profiles, with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Provitamin A; Biofortification; Packaging; Storage.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000400363

Carryover effect of fomesafen, applied on edible bean, on sucessional maize
Provedor de dados: 87
Autores: Cobucci,Tarcísio; Silva,.João B.; Prates,Hélio T.
Carryove reffects of fomesafen on successional maize were studied in clay soil. Fomesafen was applied as postemergence at Five rate s (0; 0.12 5: 0.25 ; 0.37 5, and 0.5 kg/ha-1) to edible beans. Maize was planted 198 and 65 days after fomesafen application in 1992 and 212 and 65 days after fomesafen application in 1993. Fomesafen residues were detected in soils up to 20cm depth but residue concentration was higher in 0-10 cm soil depth. Fomesafen residues reduced leaf chlrophyll content and root volume of 10 days old maize when planted 65 days after application but were not affected when planted 212 days after application. However, the decreases in leaf chlorophyll and root volume did not affect the maize yield.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diphenyl ether herbicide; Herbicide persistence; Crop rotation; Phaseolus vulgaris; Zea mays.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581997000200011

Cassava as drought insurance: Food security implications of cassava trials in Central Zambia
Provedor de dados: 31
Autores: Barratt,   N.; Chitundu,   D.; Dover,   O.; Elsinga,   J.; Eriksson,   S.; Guma,   L.; Haggblade,   M.; Haggblade,   Steven; Henn,   T.O.; Locke,   F.R.; O'Donnell,   C.; Smith,   C.; Stevens,   T.
Wide, weather-induced fluctuations in maize production lead to recurrent food shortages in Zambia's maize consuming regions, while the cassava-growing regions of the north enjoy stable food production, even in drought years.  Noting this striking correlation between drought vulnerability and the prevalence of maize as a staple food, a growing array of agencies in Zambia has begun introducing highly productive new cassava varieties, developed in the north, to more central and southerly regions in an effort to provide low-cost food security during drought years.  Yet agroecological conditions in these drought-prone regions differ significantly from the northern research stations where Zambian scientists developed the new cassava varieties.  So it is not...
Tipo: Journal Article
Palavras-chave: Food Security and Poverty.
Ano: 2006
URL: http://purl.umn.edu/31729

Cassava Commercialization in Malawi
Provedor de dados: 31
Autores: Kambewa,   Emma.
Malawi continues to rely on maize for household food security. Policies to enhance food security continue to target maize production. Traditionally production and use of cassava was localized in lakeshore areas until the past two decades when maize production was increasingly affected by rainfall variability. Cassava as an alternate food crop has rapidly gained popularity and commercialization of the cassava sector is steadily taking off. Policy and institutional support to diversify the food security basket and promote the diversified applications of cassava in non-food sector has propelled cassava production in nontraditional growing areas. Production has more than quadrupled over the last decade with production of sweet cassava rapidly expanding in...
Tipo: Report
Palavras-chave: Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Food Security and Poverty.
Ano: 2010
URL: http://purl.umn.edu/97033

Cassava root meal as substitute for maize in layers ration
Provedor de dados: 89
Autores: Anaeto,M; Adighibe,LC.
The effect of replacing maize with graded levels of cassava root meal (CRM) as energy source in the diet of laying hens was evaluated during the eight weeks of feeding experiment on performance and cost benefits on layers. Forty-five Nera black laying hens of 24 weeks of age were allocated to five dietary treatments, with nine birds per treatment in a completely randomized design. CRM was used to formulate the diets at 0, 25, 50, 75, and 100%. The result showed that the feed intake of birds in the control group was significantly (p&lt;0.05) different from those fed the CRM diets. The average weight gain of layers receiving up to 50% CRM was similar to the control birds, but significantly different from layers fed 75 and 100% CRM. No mortality was recorded....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cassava root meal; Cost benefit; Laying hen; Performance.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2011000200010

Catastrophic Drought Insurance based on the Remotely Sensed Normalized Difference Vegetation Index for Smallholder Farmers in Zimbabwe
Provedor de dados: 31
Autores: Makaudze,   Ephias M.; Miranda,   Mario J.
Index insurance, which indemnifies agricultural producers based on an objectively observable variable that is highly correlated with production losses but which cannot be influenced by the producer, can provide adequate protection against catastrophic droughts without suffering from the moral hazard and adverse selection problems that typically cause conventional agricultural insurance programs to fail. Using historical maize and cotton yield data from nine districts in Zimbabwe, we find that catastrophic drought insurance contracts based on the Normalized Difference Vegetation Index (NDVI) can be constructed whose indemnities exhibit higher correlations with yield losses compared to the conventional rainfall index. In addition the NDVI contracts can be...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries; Risk and Uncertainty.
Ano: 2009
URL: http://purl.umn.edu/96183

Catch crop in maize
Provedor de dados: 21
Autores: Dierauer, Hansueli; Siegrist, Franziska; Weidmann, Gilles.
Outcome:  • Reduction of soil erosion, given a good development.  • Suppression of seed-propagated weeds.  • Better load-carrying capacity of the soil during harvest.  • Fixation of nitrogen thanks to the legumes, and utilisation of nutrients in the soil after maize harvest.   • Grazing possible immediately after maize harvest.  Inconveniences:   • Competition for water in the case of severe drought.  • Cost of seeds.  How to proceed:  • Sow the maize at the beginning of May.  • If possible, harrow a first time before appearance of the maize plants (blind harrowing). Second harrowing should take place at a plant height of 10 cm, when the maize plants are well rooted. Between a plant size of 10 to 20 cm a first hoeing should take place.  • Apply liquid...
Tipo: Practice tool
Palavras-chave: Production systems Crop combinations and interactions Cereals; Pulses and oilseeds Soil Weed management Farm nutrient management.
Ano: 2017
URL: http://orgprints.org/31021/13/PA_006_Catch-crop-maize_final_QR.pdf

Cation exchange capacity of an oxisol amended with an effluent from domestic sewage treatment
Provedor de dados: 63
Autores: Fonseca,Adriel Ferreira da; Alleoni,Luís Reynaldo Ferracciú; Melfi,Adolpho José; Montes,Célia Regina.
The addition of Na-rich anthropogenic residues to tropical soils has stimulated the scientific community to study the role of sodium in both the soil solution and the exchange complex. In this study, several different methods were used to calculate the concentration of exchangeable and soluble cations and this data was then used to establish correlations between the level of these cations and both the accumulation of various elements and the dry weight of maize grown in a greenhouse under different conditions. In the closed environments of the pots, the most suitable method for calculating the effective cation exchange capacity (ECEC) was the cation exchange capacity calculated by cations removed with barium chloride solution (CEC S). Then again, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Exchangeable cations; Soil solution; Soil with variable charge; Treated sewage effluent; Maize.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000600007

cDNA cloning, Phylogenic Analysis and Gene Expression Pattern of Phenylalanine ammonia-lyase in Sugarcane (Saccharum officinarum L.)
Provedor de dados: 52
Autores: Hashemitabar,Mahmoud; Kolahi,Maryam; Tabandeh,Mohammad Reza; Jonoubi,Parisa; Majd,Ahmad.
The aim of the present study was to clone and characterize a full length cDNA of sugarcane (Saccharum officinarum) phenylalanine ammonia-lyase (SoPAL). Differential tissue expression pattern of the SoPAL transcript and its enzyme activity was also analyzed during the tillering stage of growth. The full-length of SoPAL cDNA was 2118 bp long and contained a protein with 706 amino acids, determined by encoding technique. The amino acid sequence and phylogenic analysis of the cloned SoPAL showed high similarity to PAL from other monocotyledonous such as sorghum (96%), maize (93%) and Bamboos (87.12%). The highest levels of SoPAL transcript were observed in the root and stem, while its minimal gene expression levels were in the leaves and sheath, respectively....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenylalanine ammonia-lyase; Saccharum officinarumL; Cloning; Tissue expression.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400456

Cell fusion and chromatin degeneration in an inbred line of maize
Provedor de dados: 74
Autores: Caetano-Pereira,Creuci Maria; Pagliarini,Maria Suely; Brasil,Edward Madureira.
A large number of maize genotypes are currently being evaluated to determine the effect of environmental stress caused by the aluminum found in cerrado soils on meiotic behavior. In the present study we report the occurrence of cell fusion followed or not by chromatin degeneration in meiocytes of some plants of an inbred line of maize grown on acid and corrected soil in the Brazilian central plateau. The results suggest the absence of any soil effect on the irregularities observed since the number of affected plants was higher among those grown on corrected soil. The possible causes of these irregularities and their influence on male sterility are discussed.
Tipo: Info:eu-repo/semantics/other
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100014

Cellulase effect on anaerobic digestion of maize silage under discontinuous operation
Provedor de dados: 70
Autores: Oliva-Merencio,Deny; Pereda-Reyes,Ileana; Schimpf,Ulrike; Koehler,Stefan; Silva,Ariovaldo J. da.
ABSTRACT This paper studied the effect of adding an enzyme (ellulose) on anaerobic digestion of maize silage. We compared materials at chopping lengths of 8 mm (MSL), 4mm (MSS) and natural size (Ms) under a mesophilic and discontinuous operation (batch process). Hence, we found the process to be significantly influenced by particle size. Moreover, the ellulose addition did not significantly impact biogas production after a 35-day digestion period. Ms and MSS displayed an improved response to all variables when compared with MSL and MSL+C, with significant differences. Studies on the refractory fraction at infinite time (R0) have demonstrated that the lowest values correspond to Ms and MSS (0.122 and 0.155, respectively). The Kinetic approach and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ellulose; Silage; Biogas; Kinetics; Biodegradability.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000500951

Cercosporiose ataca o milho.
Provedor de dados: 14
Autores: CASELA, C. R.
bitstream/item/45090/1/Cercosporiose-ataca.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Maize; Cercospora-zeae-maydis; Disease.; Cercosporiose; Doença; Milho; Zea Mays.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484423

Cereal Crop Productivity in Developing Countries: Past Trends and Future Prospects
Provedor de dados: 31
Autores: Pingali,   Prabhu L.; Heisey,   Paul W.
This paper synthesizes the evidence on cereal crop productivity in developing countries over the past 30 years and looks at future prospects for productivity growth. For more than three decades we have witnessed the phenomenal growth of cereal crop productivity in the developing world. Termed the Green Revolution, the initial phase of this growth resulted from an increase in land productivity and occurred in areas of growing land scarcity and/or areas with high land values. Significant investments in research and infrastructure development, especially irrigation, were the strategic components of this increased productivity. In the post-Green Revolution period, particularly in Asia, productivity growth has been sustained through increased input use and,...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/7682

CGPRT Crops in the Philippines: a Statistical Profile, 1990-1999
Provedor de dados: 31
Autores: Chowdhury,   Mohammad A.T.; Arif,   Muhamad.
"CGPRT Crops in the Philippines: A Statistical Profile, 1990-1999" is the eighth in the series of the CGPRT Centre's publications providing specific and wide-ranging agricultural data focusing on coarse grains, pulses, roots and tuber (CGPRT) crops in Asia. An earlier series was published in January 1992 in collaboration with the Philippine Council for Agriculture, Forestry and Natural Resources Research and Development (PCARRD) covering the period 1960-1990. In keeping pace with the previous publication, this updated volume covers eight crops: corn (maize), mungbean, soybean, groundnut, cassava, sweet potato, white potato and rice. Although not a CGPRT crop, rice is the most important crop in the Philippines in terms of area planted and production, hence...
Tipo: Report
Palavras-chave: Food crops; Area harvested; Planted areas; Plant production; Prices; Crop Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/32712

Challenges for Revival of Indian Agriculture
Provedor de dados: 31
Autores: Dev,   S. Mahendra.
In India, economic growth has improved significantly during the past two and a half decades, particularly in the post-reform period. India is considered as one of the fastest growing economies in the world. However, the exclusion problems have not been addressed seriously by the government programmes and strategies. The experience of the economic reforms during the past 15 years indicates that while there have been improvements in the economic growth, foreign exchange, IT revolution, export growth, etc., the income distribution has been unequal and only some sections of the population have been benefited more from this higher growth and prosperity. In other words, real development in terms of growth shared by all sections of the population has not taken...
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy.
Ano: 2009
URL: http://purl.umn.edu/57379

Change in root apical protein and peroxidase activity in response to aluminum in tolerant and sensitive maize inbred lines
Provedor de dados: 61
Autores: Souza,Isabel Regina Prazeres de; Alves,Vera Maria Carvalho; Parentoni,Sidney Netto; Oliveira,Antônio Carlos de; Teixeira,Flávia França; MacAdam,Jennifer Wilson; Purcino,Antônio Álvaro Corsetii.
The effects of a short-term (80 min) exposure to 222 µM aluminum (Al) on the protein content and expression and on peroxidase activity and isoenzymes in the primary root of maize were evaluated. Two inbred lines differing in their level of tolerance to Al were used: Cateto 237 (tolerant) and L36 (sensitive). The apical 20 mm of the primary root was divided into 2-mm-long segments that were analyzed for total protein content and peroxidase activity. These results demonstrate that the total protein content along the root apex was not affected by Al in the tolerant inbred line, but decreased in the sensitive line. In the apical 2 mm of the root of the sensitive line, the expression of low molecular weight proteins (43 kDa or smaller) was decreased. Expression...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aluminum toxicity; Maize; Peroxidase isoforms; Root growth.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202002000300006

Changes in a Rhodic Hapludox under no-tillage and urban waste compost in the northwest of Rio Grande do Sul, Brazil
Provedor de dados: 90
Autores: Moraes,Moacir Tuzzin de; Silva,Vanderlei Rodrigues da; Cherubin,Maurício Roberto; Carlesso,Reimar; Debiasi,Henrique; Levien,Renato.
The use of urban waste compost as nutrient source in agriculture has been a subject of investigation in Brazil and elsewhere, although the effects on soil physical and chemical properties and processes are still poorly known. The aim of this study was to evaluate the effect of application of urban waste compost and mineral fertilizer on soil aggregate stability and organic carbon and total nitrogen content of a Rhodic Hapludox under no-tillage in the northwestern region of Rio Grande do Sul, Brazil, in the 2009/2010 and 2010/2011 growing seasons. The experiment was arranged in a 2 × 6 (seasons and fertilization) factorial in a randomized complete block design with four replications. The factor time consisted of two growing seasons (sunflower in 2009/10 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil organic carbon; Aggregate stability; Total nitrogen; Soil structure; Organic manure.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400028

Changes in bacterial community of soil induced by long-term straw returning
Provedor de dados: 63
Autores: Chen,Yanling; Xin,Li; Liu,Jintao; Yuan,Mingzhang; Liu,Shutang; Jiang,Wen; Chen,Jingpei.
ABSTRACT: Straw returning is an effective way to improve soil quality. Whether the bacterial community development has been changed by long-term straw returning in non-calcareous soil is not clear. In this study, the following five treatments were administered: soil without fertilizer (CK); wheat and corn straw returning (WC); wheat straw returning with 276 kg N ha−1 yr−1 (WN); manure, 60,000 kg ha−1 pig manure compost (M) and wheat and corn straw returning with 276 kg N ha−1 yr−1 (WCN). The high-throughput 16S rRNA sequencing technology was used to evaluate the bacterial communities. The results showed that the community was composed mostly of two dominant groups (Proteobacteria and Acidobacteria). Bacterial diversity increased after the application of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Long-term experiment; Soil quality; Soil bacterial composition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000500349

Changes in PEP Carboxylase, Rubisco and Rubisco activase mRNA levels from maize (Zea mays) exposed to a chronic ozone stress
Provedor de dados: 48
Autores: LEITAO,LOUIS; MAORET,JEAN-JOSÉ; BIOLLEY,JEAN-PHILIPPE.
We quantified the ozone impact on levels of Zea mays L. cv. Chambord mRNAs encoding C4-phosphoenolpyruvate carboxylase (C4-PEPc), ribulose-l,5-bisphosphate carboxylase/oxygenase small and large subunits (Rubisco-SSU and Rubisco-LSU, respectively) and Rubisco activase (RCA) using real-time RT-PCR. Foliar pigment content, PEPc and Rubisco protein amounts were simultaneously determined. Two experiments were performed to study the ozone response of the 5th and the 10th leaf. For each experiment, three ozone concentrations were tested in open-top chambers: non-filtered air (NF, control) and non-filtered air containing 40 (+40) and 80 nL L-1 (+80) ozone. Regarding the 5th leaf, +40 atmosphere induced a loss in pigmentation, PEPc and Rubisco activase mRNAs....
Tipo: Journal article
Palavras-chave: Carboxylase; Maize; MRNA; Ozone; Rubisco activase.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602007000200005

Changes in physical properties and organic carbon of a Kandiudox fertilized with manure
Provedor de dados: 65
Autores: Andrade,Andréia Patricia; Rauber,Luiz Paulo; Mafra,Álvaro Luiz; Baretta,Dilmar; Rosa,Márcio Gonçalves da; Friederichs,Augusto; Mafra,Maria Sueli Heberle; Casara,Ana Cláudia.
ABSTRACT: Successive applications of pig slurry and poultry manure can improve the soil structure, according to the land use conditions and amounts applied. This study evaluated the effect of manure fertilization on the physical properties and organic carbon of a Rhodic Kandiudox. Treatments included land use and management and time of pig slurry and poultry litter application, namely: native forest (NF); yerba mate after 20 years of animal waste application (YM20); pasture after 15 years of application (P15); grassland after 20 years of manuring (PP20); grassland after 3 years of manuring (P3); pasture without application (P0), maize after 20 years of application (M20); and maize after 7 years of application (M7). Soil samples were collected in the 0-5,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal waste; Soil quality; Structure.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000500809

CHANGES IN SOIL CHEMICAL PROPERTIES PROMOTED BY FERTIGATION WITH TREATED SANITARY WASTEWATER
Provedor de dados: 70
Autores: Santos,Silvânio R.; Ribeiro,Danilo P.; Matos,Antonio T.; Kondo,Marcos K.; Araújo,Edcássio D.
ABSTRACT We evaluate the application of treated sanitary wastewater (TSW) to provide potassium for crops and reduce demand for fresh water and mineral nutrients. The field experiment was arranged in randomized block design with four replications and five treatments: 50, 100, 150 and 200% of potassium requirements and a control with conventional fertilizer. The TSW was applied to maize (November 2012 to February 2013), cotton (June to November 2013) and bean (April to June 2014). After bean, soil chemical properties were evaluated until 0.8 m depth. Fertigation with TSW to potassium fertilization provided about 50% of water, nitrogen and phosphorus to the bean. The soil nutrient availability and soil organic matter did not increase, whereas sodium had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Effluent; Fertilization; Irrigation; Sewage; Sodium.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200343

Changes in Yield Stability: Wheat and Maize in Developing Countries
Provedor de dados: 31
Autores: Gollin,   Douglas.
This study asks whether the diffusion of modern varieties has affected the yield stability of wheat and maize production in developing countries between 1960 and 2004. The data suggest strongly that, over the past forty-plus years, there has been a striking decline in the relative variability of grain yields in wheat and (to a lesser extent) maize. The declines are strongest when measured as the standard deviation of yield divided by the mean, but there have also been declines in other measures of variability, such as the percentage deviation from trend. Declines in yield variability do not appear to be driven by increases in intensification (e.g., irrigation), nor do they appear to extend to crops, such as oilseeds, in which there has been little...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/25239

Changing Competitiveness of the Wheat Sector of Kazakhstan and Sources of Future Productivity Growth
Provedor de dados: 31
Autores: Longmire,   James L.; Moldashev,   Altynbeck.
Economic incentives in Kazakhstan have been radically reshaped since the Soviet era ended in 1991. In the first phase of transition, the economy and agricultural sectors declined by 40-50%. Overall economic growth refused in 1996, and agriculture is likely to enter a recovery phase soon. The economy of Kazakhstan is undergoing rapid structural change, and agriculture is experiencing strong inter-sectoral competition. The change to market-oriented and commercially-driven agriculture has altered fundamentally the incentives faced by Kazakhstan's wheat farmers. They have reduced use of inputs sharply because of the need to pay market prices for fertilizer, fuel, and other inputs, while severely curtailing investment in machinery and their farms generally....
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/7686

Changing Priorities for International Agricultural Research
Provedor de dados: 31
Autores: Herdt,   Robert W.
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2001
URL: http://purl.umn.edu/7659

Characteristics of a β-1,4-D endoglucanase from Trichoderma virens wholly applied in a palm-fruit husk-based diet for poultry layers
Provedor de dados: 58
Autores: Odeniyi,Olubusola A.; Onilude,Anthony A.; Ayodele,Maria A.
The characteristics of an endoglucanase produced by a Trichoderma virens strain T9 newly isolated from a palm-fruit husk dump site, its physiological characteristics and enzyme production were studied. Whole cells of the depolymerizing-enzyme producing T. virens were applied to palm-fruit husk and bird performance characteristics when employed as poultry diet additive were considered. Endoglucanase activity in submerged fermentation was 1.6 nkat. Optimum activity was recorded at pH 6.0 and 55ºC. The enzyme retained 50% residual glucanase activity at 70ºC for 10 minutes. 1.0% Tween-80 and SDS yielded endoglucanase activity 2.15 times higher than the control. Activity wasboosted by 20mM Ca2+ (115.0%); 10mM K+ (106.5%); and was totally inhibited by 1mM Hg2+....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Trichoderma virens; Endoglucanase; Physiology; Poultry layer feed.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400031

Characterization and expression analysis of WOX2 homeodomain transcription factor in Aegilops tauschii
Provedor de dados: 74
Autores: Zhao,Shan; Jiang,Qian-Tao; Ma,Jian; Wang,Ji-Rui; Liu,Ya-Xi; Chen,Guo-Yue; Qi,Peng-Fei; Pu,Zhi-En; Lu,Zhen-Xiang; Zheng,You-Liang; Wei,Yu-Ming.
The WUSCHEL (WUS)-related homeobox (WOX) gene family coordinates transcription during the early phases of embryogenesis. In this study, a putative WOX2 homolog was isolated and characterized from Aegilops tauschii, the donor of D genome of Triticum aestivum. The sequence consisted of 2045 bp, and contained an open reading frame (ORF), encoded 322 amino acids. The predicted protein sequence contained a highly conserved homeodomain and the WUS-box domain, which is present in some members of the WOX protein family. The full-length ORF was subcloned into prokaryotic expression vector pET-30a, and an approximately 34-kDa protein was expressed in Escherichia coli BL21 (DE3) cells with IPTG induction. The molecular mass of the expressed protein was identical to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: WOX2; Aegilops tauschii; Phylogenetic analysis; Real-time quantitative PCR.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000100079

Characterization of corn landraces planted grown in the campos gerais region (Paraná, Brazil) for industrial utilization
Provedor de dados: 52
Autores: Pinto,Alessandra Teixeira Barbosa; Pereira,Joyce; Oliveira,Tatiana Roselena de; Prestes,Rosilene Aparecida; Mattielo,Rodrigo Rodrigues; Demiate,Ivo Mottin.
This work has the objective of characterizing twenty corn landraces grown in the Campos Gerais region (Paraná State) in relation to its chemical composition (moisture, ash, protein, ether extract, dietary fiber and starch) and physical properties (weight of 1000 grains, real density, flotation index, granulometry and color). In addition, also the lab scale processing of the kernels from the varieties was carried out for producing starch; starch purity was evaluated by measuring its protein contamination. Amylose contents and viscoamylograph profile were also evaluated. The results showed that the evaluated landraces have differences in chemical composition as well as in pericarp/endosperm/germ proportions and consequently it should have different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize landraces; Chemical composition; Starch; Physical properties; Rapid viscoanalyzer.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000700003

Characterization of cover crops by NMR spectroscopy: impacts on soil carbon, nitrogen and phosphorus under tillage regimes
Provedor de dados: 124
Autores: Carvalho,Arminda Moreira de; Marchão,Robélio Leandro; Bustamante,Mercedes Maria da Cunha; Alcântara,Flávia Aparecida de; Coser,Thais Rodrigues.
The objective of this study was to investigate the chemical composition of cover crops by solid-state CPMAS 13C NMR spectroscopy and its effects on carbon, nitrogen and phosphorus in a Typic Acrustox. Cover crops (Crotalaria juncea, Canavalia brasiliensis, Cajanus cajan, Mucuna pruriens and Raphanus sativus) and natural fallow were studied in rotation with maize under conventional and no-tillage regimes. Tissues of Crotalaria juncea, Canavalia brasiliensis, Mucuna pruriens and Raphanus sativus were analyzed using CPMAS 13C NMR spectroscopy. Soil samples were collected at the end of the growing season of the cover crops (September 2002) and during the grain filling period in corn from 0-5 and 5-10 cm layers. Cajanus cajan presented the lowest content of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazilian Savanna; Solid-state CPMAS 13C NMR spectroscopy; Organic matter; Ecological Intensification.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500012

Characterization of maize populations in different environmental conditions by means of Three-Mode Principal Components Analysis
Provedor de dados: 118
Autores: Marticorena,Marta; Bramardi,Sergio; Defacio,Raquel.
Characterization of 31 native populations of maize conserved at the germplasm bank of the PNLA Pergamino Experimental Station, Argentina, was achieved by evaluating 10 quantitative attributes in two different environmental situations. The experimental design generated three-way or three-mode data, repeated observations of a set of attributes for a set of individuals in different conditions. The information was displayed in a three-dimensional array, and the structure of the data was explored using Three-Mode Principal Component Analysis, the Tucker-2 Model. A group of populations was identified that displayed homogeneous behavior in the two environments with respect to the following traits: ear length, prolificacy, grains per meter, yield and 1000 kernel...
Tipo: Journal article
Palavras-chave: Germplasm Bank; Genotype-environment interaction; Tucker-2 Model.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000300008

Characterization of Rhizobacteria from field grown Genetically Modified (GM) and non-GM maizes
Provedor de dados: 52
Autores: Bumunang,Emmanuel Wihkochombom; Babalola,Olubukola Oluranti.
This study was done to examine the rhizobacteria from field grown Genetically Modified (GM) maize and its non-GM counterpart. Rhizospheric soil samples were collected at 30 days after sowing (DAS) and at post-harvest from two experimental fields in Gauteng, South Africa. Total rhizobacteria (cfu/g) in GM and non-GM soil samples was not significantly different across the different media 30 DAS and at post-harvest. Rhizobacterial isolates obtained were biochemically characterized using the analytical profile index. Species of Pseudomonas, Aeromonas, Sphingomonas, Burkholderia, Stenotrophomonas, Achromobacter, Ewingella and Bacillus were screened in vitro for plant growth promoting traits such as, ammonia production, catalase activity, indole acetic acid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetically modified maize; Plant growth promoting traits; Rhizosphere; Rhizobacteria.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100001

Chemical and microbiological attributes of an oxisol treated with successive applications of sewage sludge¹
Provedor de dados: 90
Autores: Bueno,José Rafael Pires; Berton,Ronaldo Severiano; Silveira,Adriana Parada Dias da; Chiba,Marcio Koiti; Andrade,Cristiano Alberto de; Maria,Isabella Clerici De.
Studies on sewage sludge (SS) have confirmed the possibilities of using this waste as fertilizer and/or soil conditioner in crop production areas. Despite restrictions with regard to the levels of potentially toxic elements (PTE) and pathogens, it is believed that properly treated SS with low PTE levels, applied to soil at adequate rates, may improve the soil chemical and microbiological properties. This study consisted of a long-term field experiment conducted on a Typic Haplorthox (eutroferric Red Latosol) treated with SS for seven successive years for maize production, to evaluate changes in the soil chemical and microbiological properties. The treatments consisted of two SS rates (single and double dose of the crop N requirement) and a mineral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Municipal waste; Organic matter; Soil microbes; Maize.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400040

Chemical and mineralogical changes in a Brazilian Rhodic Paleudult under different land use and managements
Provedor de dados: 90
Autores: Fink,Jessé Rodrigo; Inda,Alberto Vasconcellos; Almeida,Jaime Antonio de; Bissani,Carlos Alberto; Giasson,Elvio; Nascimento,Paulo César do.
Changes in land use and management can affect the dynamic equilibrium of soil systems and induce chemical and mineralogical alterations. This study was based on two long-term experiments (10 and 27 years) to evaluate soil used for no-tillage maize cultivation, with and without poultry litter application (NTPL and NTM), and with grazed native pasture fertilized with cattle droppings (GrP), on the chemical and mineralogical characteristics of a Rhodic Paleudult in Southern Brazil, in comparison with the same soil under native grassland (NGr). In the four treatments, soil was sampled from the 0.0-2.5 and 2.5-5.0 cm layers. In the air-dried fine soil (ADFS) fraction (∅ &lt; 2 mm), chemical characteristics of solid and liquid phases and the specific surface...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon; Soil management systems; Animal waste; Mineral stability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400026

Chemical and organic fertilizers management for long-term young ear corn production
Provedor de dados: 106
Autores: Ring Meesawat; Pradit Boonampol; Boonnom Unkasem; Prakorn Limsamutrachaiporn; Tunya Tavonratana; Grit Rattanaphatoom.
6 tables
Palavras-chave: Corn; Maize; Young ear corn; Chemical fertilizers; Organic fertilizers; ข้าวโพดฝักอ่อน; ปุ๋ยอินทรีย์; ปุ๋ยเคมี; ผลผลิต.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4592

Chemical and physical changes in an Argisol under agrosilvopastoral system in Votuporanga, São Paulo State, Brazil
Provedor de dados: 109
Autores: Barbosa-Borges,Wander Luis; Dalto de Souza,Isabela Malaquias; Aparecida-Bazzo,Vanda.
Abstract Conservation management systems that have intended to prevent wear or soil degradation have been widespread in agriculture. The study was conducted in Site São Luiz at Simonsen district, Votuporanga, São Paulo State, in order to evaluate the chemical and physical changes in an area with agrosilvopastoral system and deployed with three soil management (treatments): Full (conventional tillage, liming and application of gypsum, phosphate and potassium); intermediate (no tillage, liming and application of gypsum at surface) and basic (no tillage and surface liming). The soil was managed in July 2009 and the planting of eucalyptus was realized in January 2010, on the terraces. Between the terraces it was cropped maize intercropped with Urochloa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corymbia citriodora; Eucalyptus urograndis; Integrated systems; Soil management; Urochloa brizantha.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000100075

Chemical and physical soil attributes in integrated crop-livestock system under no-tillage
Provedor de dados: 124
Autores: Silva,Hernani Alves da; Moraes,Anibal de; Carvalho,Paulo César de Faccio; Fonseca,Adriel Ferreira da; Caires,Eduardo Fávero; Dias,Carlos Tadeu dos Santos.
Although integrated crop-livestock system (ICLS) under no-tillage (NT) is an attractive practice for intensify agricultural production, little regional information is available on the effects of animal grazing and trampling, particularly dairy heifers, on the soil chemical and physical attributes. The objective of this study was to evaluate the effects of animal grazing on the chemical and physical attributes of the soil after 21 months of ICLS under NT in a succession of annual winter pastures (2008), soybeans (2008/2009), annual winter pastures (2009), and maize (2009/10). The experiment was performed in the municipality of Castro (PR) in a dystrophic Humic Rhodic Hapludox with a clay texture. The treatments included a combination of two pasture (annual...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tropical soil; Integrated production system; Conservationist agricultural; Soil acidity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500010

Chemical and physical-hydric characterisation of a red latosol after five years of management during the summer between-crop season
Provedor de dados: 90
Autores: Silva,José Fausto Guimarães; Severiano,Eduardo da Costa; Costa,Kátia Aparecida de Pinho; Benites,Vinícius de Melo; Guimarães Júnnyor,Wellingthon da Silva; Bento,José Carlos.
Agricultural production systems that include the production of mulch for no-tillage farming and structural improvement of the soil can be considered key measures for agricultural activity in the Cerrado region without causing environmental degradation. In this respect, our work aimed to evaluate the chemical and physical-hydric properties of a dystrophic Red Latosol (Oxisol) in the municipality of Rio Verde, Goias, Brazil, under different soil management systems in the between-crop season of soybean cultivation five years after first planting. The following conditions were evaluated: Brachiaria brizantha cv. Marandu as a cover crop during the between-crop season; Second crop of maize intercropped with Brachiaria ruziziensis; Second crop of grain alone in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria; Crop succession; No-tillage; Least limiting water range; Water availability.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500023

Chemical attributes of soil and dry mass accumulation of maize fertilized with cassava wastewater
Provedor de dados: 70
Autores: Magalhães,Adriana G.; Rolim,Mario M.; Duarte,Anamaria S.; Pedrosa,Elvira M. R.; Silva,Enio F. de F. e.
The aim of this study was to evaluate chemical attributes alterations of a clay-loam textured soil and dry mass accumulation of maize submitted to application of cassava wastewater doses in three assessment periods. The experiment was conducted under greenhouse using a completely randomized experimental design in a factorial 5 × 3, with four replicates. The analyzed factors of research were doses of cassava wastewater (0; 12.6; 25.2; 50.4; 75.6 m3 ha-1) andassessment periods (20, 40 and 52 days after germination). The following parameters were determined: electric conductivity of soil saturation extract, pH in water, content of available P, content of exchangeable K+, Ca2+, Mg2+ and Na+ of soil, dry mass of leaves and stem. The application of cassava...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Residue; Starch; Nutrients; Organic fertilization; Zea mays.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000300458

Chemical characterization of wheat kernels naturally contaminated by deoxynivalenol-DON when cultivated under nitrogen management strategies
Provedor de dados: 124
Autores: Souza,Thiago Montagner; Prando,André Mateus; Takabayashi-Yamashita,Cassia Reika; Zucareli,Claudemir; Hirooka,Elisa Yoko.
ABSTRACT Chemical composition and contamination of wheat kernels (Triticum aestivum L.) directly affect the quality of the flour obtained from them, determining its acceptability and use by industry. Field trials were conducted to evaluate the effect of agricultural practices on wheat kernel quality (chemical composition and contamination). Cultivation was carried out following maize or soybean (crop succession), with application of nitrogen doses in topdressing (0, 30, 60, 90, and 120 kg ha-1), using seeds inoculated or not inoculated with Azospirillum brasilense. Data were subjected to analysis of variance (ANOVA), comparison of means by Tukey's test (&lt;0.05), and regression to nitrogen doses. Crop succession resulted in changes in kernel chemical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum (L.); Crop succession; Nitrogen doses; Azospirillum brasilense; Kernel composition.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000400650

Chemical composition of sorghum genotypes silages
Provedor de dados: 2
Autores: Moura, Marielly Maria Almeida; Pires, Daniel Ananias de Assis; Rodrigues, José Avelino Santos; Sales, Eleuza Clarete Junqueira de; Costa, Renê Ferreira; Tolentino, Daniella Cangussú.
 The objective was to select sorghum genotypes for silage production using its chemical characteristics. The experiment was carried out in the facilities of Embrapa Maize and Sorghum in Sete Lagoas, state of Minas Gerais, to evaluate the agronomic characteristics, and nutritional quality of silage of twelve sorghum genotypes. We used a randomized block design with three replications. In relation to the production of green matter, the genotypes SF15 Volumax and BR610 stood out (52.07; 48.00 and 41.87 ton ha-1). Regarding pH, genotypes 1015339, 1015347, 1016007, SF15, BRS655, Volumax and BR610 averaged 3.68. All genotypes were similar considering the nutritional value, ammonia nitrogen and water activity. The genotypes SF15, Volumax and BRS610 showed the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ZOOTECNIA; NUTRIÇÃO E FORRAGICULTURA preserved food; Seasonality; Genotypes and production.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/31810

Chemical nature of soil humified fractions and their bioactivity
Provedor de dados: 86
Autores: Canellas,Luciano Pasqualoto; Façanha,Arnoldo Rocha.
The aim of this work was to evaluate the humus composition from an Ultisol from Campos dos Goytacazes, RJ, Brazil. Soil samples of four depths (0-0.05, 0.05-0.10, 0.10-0.20 and 0.20-0.40 m) and its chemical nature were analysed by elemental composition, E4/E6 ratios and Fourier transformed infrared spectroscopy. The bioactivity of these humified substances was evaluated through their action on maize root growth and H+-ATPase activity of roots microsomes. In topsoil, the content of high condensed alkaline soluble humic substances is greater than that found in the subsuperficial layers. The chemical nature of humic and fulvic acids also varied with the soil depth. The humic acids isolated from the soil samples exhibited higher bioactivity compared with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fulvic acids; Humic acids; H+-ATPase.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000300005

Chemical weed control in corn
Provedor de dados: 106
Autores: Vega, M.R.; Obien, S.R.; Ona, J.D.
4 ill., 8 tables
Palavras-chave: Corn maize weeds 2; 4-D atrazine simazine weed control ข้าวโพด วัชพืช สารกำจัดวัชพืช การควบคุมวัชพืช.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3746

China’s water pricing reforms for irrigation: effectiveness and impact
Provedor de dados: 31
Autores: Liao,   Yongsong; Gao,   Zhanyi; Bao,   Ziyun; Huang,   Qingwen; Feng,   Guangzhi; Xu,   Di; Cai,   Jiabin; Han,   Huijing; Wu,   Weifeng.
Irrigation occupies a central position in China’s crop production. However, due to low per capita water resources, much worse, unevenly distributed over regions and time and the rapid increase of water diversions to non-irrigation sectors, irrigation water shortages have become a very serious problem. Without the adoption of effective measures this problem may even threaten China’s food security. Currently, irrigation efficiency is very low in general, irrigation water prices cannot fully recover water supply costs, and irrigation facilities are aging due to the lack of funding for O&amp;M (operation &amp; maintenance). Since water prices are regulated by the government, and not determined by the market, water prices did not work effectively in water...
Tipo: Working or Discussion Paper
Palavras-chave: Water rates; Pricing; Price policy; Cost recovery; Farmers attitudes; Water rights; Water market; Water supply; User charges; Irrigation water; Water allocation; Irrigation management; Participatory management; Water conservation; Institutions; Organizations; Water users associations; Cereals; Yields; Models; Labor; Cost benefit analysis; Irrigation requirements; Investment; Groundwater management; Wells; Irrigation canals; Food security; Legal aspects; Crop Production/Industries; Farm Management; Food Security and Poverty; Production Economics; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/91872

Chitosan application in the induction of water deficit tolerance in maize plants
Provedor de dados: 1
Autores: Almeida, Lorena Gabriela; Magalhães, Paulo César; Karam, Décio; Silva, Eder Marcos da; Alvarenga, Amauri Alves.
The present research seeks to elucidate the feasibility of chitosan (CHT) in the induction of water deficit tolerance in different maize hybrids, contrasting tolerance to water restriction, tolerance and sensitivity. The maize plants were subjected to water deficit and foliar application of different chitosan doses (60, 100, 140, and 180 mg L-1) at the pre-flowering growth stage and evaluated during the stress period of fifteen days. To understand the induction behaviour of the tolerance to water restriction, biophysical parameters, such as water potential, relative water content and chlorophyll content, gas exchange, and biochemical assays, were quantified based on the activity of SOD, CAT, APX, and PAL antioxidant enzymes, lipid peroxidation activity and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antiperspirant; Antioxidant enzymes; Water stress; Gas exchange.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42463

Chlorophyll meter reading compared with incomeof maize (Zea mays L.)
Provedor de dados: 22
Autores: Segatto, Cristiane; Conte, Rodrigo; Lajús, Cristiano Reschke; Luz, Gean Lopes da.
Reading the chlorophyll content via chlorophyll meter (SPAD) is a tool AP that provides the farmer subsidy to check the performance of the crops before the nitrogen fertilization. The use of chlorophyll meter enables quickly and easily on the results, an alternative to detect the nutritional status of the plants. This study aimed to evaluate the relationship of the chlorophyll meter readings with the yield of corn. The experiment was conducted in the city of Coronel Freitas / SC season 2014/2015. The ratings for the different corn hybrids and supply levels were performed according to the following factors: Hybrids Simple (HS) with the event VT PRO® (DKB 240 and DKB 290); Development stages (V3-V4, V6, V7 and V10 and Heading stages (R1)). Nitrogen Supply...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fertilization; SPAD; Zea mays L.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14009

Choice of grazed herbage or maize silage by lactating dairy cows: influence of sward height and concentrate level
Provedor de dados: 45
Autores: Hernandez-Mendo,O.; Leaver,J.D.
The preference of lactating dairy cows for grazed herbage or maize silage (MS), simultaneously offered ad libitum in the field, was examined at two sward heights (SH 4-6 and 8-10cm) and two concentrate levels (CL 0 and 6kg day-1) in a 2x2 factorial arrangement within a completely randomised experimental design. The experiment lasted 35 days and was carried out in spring using 24 multiparous Holstein Friesian cows. On average, the cows proportionately spent more time grazing than eating MS (0.85:0.15) and even though the higher rate of intake (RI) of dry matter (DM) of MS compared with grazed herbage (76 versus 26g DM min-1), the proportion of total DM intake as herbage was higher compared to that of MS (0.56:0.44). The higher crude protein and low fibre...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Milking cow; Diet selection; Concentrate; Sward height.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000500019

Choice of parents to develop a synthetic variety
Provedor de dados: 106
Autores: Mochizuki, Noboru.
1 ill., 1 table
Palavras-chave: Corn; Maize; Synthetic variety; Parent lines; Plant breeding; Yields; ข้าวโพด; พันธุ์สังเคราะห์; สายพันธุ์พ่อแม่.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3896

Chromium accumulation in maize and cowpea after successive applications of composted tannery sludge
Provedor de dados: 1
Autores: Sousa, Ricardo Silva de; Nunes, Luis Alfredo Pinheiro Leal; Lima, Aurenivia Bonifacio de; Melo, Wanderley Jose de; Antunes, Jadson Emanuel Lopes; Araujo, Ademir Sérgio Ferreira de.
Chromium (Cr) accumulation in soil and plants has been reported after successive applications of tannery sludge, which is a matter of concern because Cr can promote environmental contamination and affect the food chain. In this study, we evaluated the growth of and Cr accumulation in maize and cowpea after seven years of consecutive applications of composted tannery sludge (CTS) under field conditions. The experiment consisted of application of CTS at five levels: 0 (control), 2.5, 5, 10, and 20 Mg ha-1 (dry basis). The growth of and Cr accumulation in maize and cowpea were evaluated at 75 and 65 days after plant emergence, respectively. CTS application increased the shoot biomass of maize and cowpea. Accumulation of Cr was similar for both plant species,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Waste management; Tannery sludge; Plant and soil interaction; Metals.; Solos.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35361

Chromium accumulation in maize and cowpea after successive applications of composted tannery sludge
Provedor de dados: 1
Autores: Sousa, Ricardo Silva de; Nunes, Luis Alfredo Pinheiro Leal; Lima, Aurenivia Bonifacio de; Melo, Wanderley Jose de; Antunes, Jadson Emanuel Lopes; Araujo, Ademir Sérgio Ferreira de.
Chromium (Cr) accumulation in soil and plants has been reported after successive applications of tannery sludge, which is a matter of concern because Cr can promote environmental contamination and affect the food chain. In this study, we evaluated the growth of and Cr accumulation in maize and cowpea after seven years of consecutive applications of composted tannery sludge (CTS) under field conditions. The experiment consisted of application of CTS at five levels: 0 (control), 2.5, 5, 10, and 20 Mg ha-1 (dry basis). The growth of and Cr accumulation in maize and cowpea were evaluated at 75 and 65 days after plant emergence, respectively. CTS application increased the shoot biomass of maize and cowpea. Accumulation of Cr was similar for both plant species,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciencias Agrarias; Agronomia; Ciencia do Solo waste management; Tannery sludge; Plant and soil interaction; Metals. Solos.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35361

Chromosomal locations of the maize (Zea mays L.) HtP and rt genes that confer resistance to Exserohilum turcicum
Provedor de dados: 74
Autores: Ogliari,Juliana Bernardi; Guimarães,Marco Antônio; Camargo,Luis Eduardo Aranha.
We used 125 microsatellite markers to genotype the maize (Zea mays L.) near isogenic lines (NIL) L30HtPHtPRtRt and L30htphtpRtRt and the L40htphtprtrt line which contrast regarding the presence of the recently described dominant HtP and the recessive rt genes that confer resistance to Exserohilum turcicum. Five microsatellite markers revealed polymorphisms between the NIL and were considered candidate linked markers for the HtP resistance gene. Linkage was confirmed by bulked segregant sample (BSS) analysis of 32 susceptible and 34 resistant plants from a BC1F1 population derived from the cross (L30HtPHtPRtRt x L40htphtprtrt) x L40htphtprtrt. The bnlg198 and dupssr25 markers, both located on maize chromosome 2L (bin 2.08), were polymorphic between bulks....
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Bulked segregant sample analysis; Microsatellite markers; Maize; Near-isogenic lines; Northern leaf blight.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400021

Chrysoperla externa (Neuroptera: Chrysopidae) and Utetheisa ornatrix (Lepidoptera: Arctiidae) on organically grown Crotalaria juncea (Fabaceae)
Provedor de dados: 87
Autores: Costa,M.A.; Tavares,W.S.; Pereira,A.I.A.; Cruz,I.; Serrão,J.E.; Zanuncio,J.C.
Chrysoperla externa (Neuroptera: Chrysopidae) larvae can avoid foraging on plants of Crotalaria juncea (Fabaceae) after the issuance of floral buds, when the prey of Utetheisa ornatrix (Lepidoptera: Arctiidae) incorporate toxic pyrrolizidine alkaloids from this plant. This reduces the predation and favors increasing the number of adults and eggs of this defoliator on crops of this plant. The aim of the present paper was to evaluate some biological and ecological aspects of C. externa and U. ornatrix on the organic crop of C. juncea in the EMBRAPA Maize and Sorghum in Sete Lagoas, Minas Gerais State, Brazil. Chrysoperla externa and U. ornatrix were more abundant in the vegetative and flowering stages of C. juncea, respectively, with caterpillars of this...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Crotalaria month; Green lacewing; Green manure; Integrated Pest Management.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582012000300001

Chuvas Tardias e Excessivas Retardam o Inicio da Comercialização de Milho na Zona Norte: Os Comerciantes de Pequena Escala Perspectivam Fracas Colheitas Para a Campanha de 2006/07.
Provedor de dados: 31
Autores: Equipe Tecnica do SIMA.
Resultados das Investigações do SIMA- Departamento de Estatística e Departamento de Análise de Políticas MINAG - Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Markets; Informal traders; Mozambique; Cellphones; Scales; Transport; Radio; Market information; Crop Production/Industries; Q18.
Ano: 2007
URL: http://purl.umn.edu/55252

Ciclo II de seleção entre e dentro de progênies de meios-irmãos na população de milho CMS 453.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; LEAL, M. de L. da S.; SANTOS, M. X. dos; GUIMARAES, P. E. O.
bitstream/item/91196/1/CPATC-PESQ.-AND.-48-98.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: CMS 453; Melhoramento genético; Maize; Genetics improvement.; Milho; Seleção.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/359666

Ciclo II de seleção na população de milho CMS 52 no nordeste brasileiro.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; LEAL, M. de L. das; SANTOS, M. X. dos.
bitstream/item/90702/1/CPATC-PESQ.-AND.-46-98.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Variedade CMS 52; Melhoramento genético; Brasil; Nordeste; Maize; Variety CMS 52; Genetics improvement.; Milho; Seleção.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/359664

Ciclo inicial de seleção entre e dentro de famílias de meios-irmãos na população de milho CMS 52 nos tabuleiros de Sergipe.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; GUIMARAES, P. E. de O.; SANTOS, M. X. dos.
bitstream/item/87368/1/CPATC-PESQ.-AND.-08-96.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Melhoramento genético; Tabuleiros; Brasil; Sergipe; Maize; Tableland.; Milho; População; Seleção.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/358446

Ciclo XI de seleção entre e dentro de progênies de meios-irmãos na variedade de milho BR 5028 - São Francisco.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; LEAL, M. de L. da S.; SANTOS, M. X. dos.
bitstream/item/91264/1/CPATC-PESQ.-AND.-51-98.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: São Francisco; Melhoramento genético; Maize; Selection; Genetics improvement.; Milho; Seleção; Variedade.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/359663

Ciclo XII de seleção entre e dentro de progênies de meios-irmãos na variedade de milho BR 5011 sertanejo.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; LEAL, M. de L. das; SANTOS, M. X. dos.
bitstream/item/90704/1/CPATC-PESQ.-AND.-47-98.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Variedade sertanejo; Melhoramento genético; Maize; Variety sertanejo; Genetics improvement.; Milho.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/359665

Ciclos X e XI de seleção entre e dentro de progênies de meios-irmãos na variedade de milho BR 5033 - Asa Branca.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; LEAL, M. de L. da S.; SANTOS, M. X. dos.
bitstream/item/90700/1/CPATC-PESQ.-AND.-45-98.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Asa branca; Maize; Selection.; Milho; Seleção.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/359787

CIMMYT 1997/98 WORLD MAIZE FACTS AND TRENDS; MAIZE PRODUCTION IN DROUGHT-STRESSED ENVIRONMENTS: TECHNICAL OPTIONS AND RESEARCH RESOURCE ALLOCATION
Provedor de dados: 31
Autores: Heisey,   Paul W.; Edmeades,   Gregory O.
This publication, through its focus on maize production in drought stressed areas of developing countries, explores economic, research, and policy issues related to maize agriculture in marginal areas of the developing world generally. Key questions in the debate over agriculture in marginal vs. favorable production areas are reviewed with a focus on maize. Questions include whether maize production is expanding into marginal areas, if production from such areas is necessary to meet future demand, and what is the relationship between marginal production environments and poverty. Different research resource allocations (leading to technological change) are modeled to compare gains and losses to producers and consumers in marginal, favorable, and urban areas...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/9369

CIMMYT 1998-99 WORLD WHEAT FACTS AND TRENDS. GLOBAL WHEAT RESEARCH IN A CHANGING WORLD: CHALLENGES AND ACHIEVEMENTS
Provedor de dados: 31
Autores: Pingali,   Prabhu L.
This report has four parts. The first part focuses on the changing environment in which the international wheat research system functions in developing countries. The authors describe recent trends in developing country wheat production against projected demand for wheat. Next, they present strategies for increasing productivity in favored and less favored wheat production environments. Part 1 concludes with a discussion of how emerging trends and policies, such as intellectual property protection and market liberalization, are likely to affect the global wheat research system and exchange of germplasm. Part 2 of the report presents new information on the historical impact of the international wheat improvement system, including information on the role of...
Tipo: Working or Discussion Paper
Palavras-chave: Production Economics; Productivity Analysis.
Ano: 1999
URL: http://purl.umn.edu/23726

CIMMYT 1999-2000 WORLD MAIZE FACTS AND TRENDS:  MEETING WORLD MAIZE NEEDS: TECHNOLOGICAL OPPORTUNITIES AND PRIORITIES FOR THE PUBLIC SECTOR
Provedor de dados: 31
This report has four parts. Part 1 focuses on the role international agricultural research institutions should play in meeting the rapid growth in maize demand that is anticipated during the next 20 years. Constraints to maize production in the developing world are prioritized globally and by region, including factors such as levels of poverty and subsistence farming. Technological responses to the constraints are outlined and another prioritization exercise is conducted to determine where and in which technologies public sector research investments would make the most impact. Respective roles of the public and private sectors' maize research efforts are delineated, as are areas for collaboration. Part 2 of the report presents an overview of CIMMYT's...
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2001
URL: http://purl.umn.edu/23727

CIMMYT 2000-2001 WORLD WHEAT OVERVIEW AND OUTLOOK: DEVELOPING NO-TILL PACKAGES FOR SMALL-SCALE FARMERS
Provedor de dados: 31
Part 1 of this report (which is a continuation of CIMMYT's World Wheat Facts and Trends series under a new name) explores issues related to the development and adoption of no-till technology, especially in small-scale agriculture. It describes no-till's special features, the innovation systems through which the technology evolves, a new framework for the socioeconomic study of the development and adoption of no-till, and the methodological difficulties involved in measuring no-till's benefits and adoption. This information provides the context for a series of six case studies of no-till experiences among small-scale farmers in Latin America, Africa, and Asia (and largely in wheat cropping systems). Part 1 concludes by discussing key factors conditioning...
Tipo: Working or Discussion Paper
Palavras-chave: Farm Management.
Ano: 2002
URL: http://purl.umn.edu/23725

CIMMYT corn breeding program conducted in Thailand
Provedor de dados: 106
Autores: Renfro, B.L.
6 ill.
Palavras-chave: Corn; Maize; CIMMYT; Plant breeding; Variety trials; Yields; Quality; ข้าวโพด; ซิมมิท; การปรับปรุงพันธุ์; ประชากร 22; ประชากร 28; ประชากร 31.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4131

CIMMYT international program for developing disease resistant corn materials
Provedor de dados: 106
Autores: Renfro, B.L.
8 ill., 12 tables
Palavras-chave: Corn; Maize; CIMMYT; Disease resistance; Plant breeding; Downy mildew; Stunt diseases; Stalk rot; Variety trials; ข้าวโพด; ซิมมิท; ฐานพันธุกรรม; การปรับปรุงพันธุ์; โรคราน้ำค้าง; โรคลำต้นเน่า.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4095

CIMMYT maize activities in Asia
Provedor de dados: 106
Autores: Fishcher, K.S.
4 tables
Palavras-chave: Corn; Maize; CIMMYT; Activities; Germplasm improvement; Production research; Training; Asia; ข้าวโพด; ซิมมิท; การปรับปรุงเชื้อพันธุกรรม; การวิจัยการผลิต; การฝึกอบรม.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4041

CIMMYT's Formal Training Activities: Perceptions of Impact from Former Trainees, NARS Research Leaders, and CIMMYT Scientists
Provedor de dados: 31
Autores: Cooksy,   Leslie J.; Arellano,   Elias.
This report provides information on the impact of CIMMYT training, based on a set of background interviews with center staff, reviews of relevant data and documents provided by CIMMYT, and two surveys: one of research leaders in trainees’ countries of origin and one of participants in CIMMYT courses on maize and wheat improvement, quality protein maize, soil-borne pathogens of cereals, and maize stress breeding during 2002-04. Evidence indicates that training provided by CIMMYT not only furnishes new knowledge and skills, but results in new ways of thinking about research and new research partnerships, is often shared within trainees’ home institutions, and changes the way the institutions work. The evidence in this study establishes the existence of...
Tipo: Report
Palavras-chave: Training programmes; Training courses; Education; Extension; Agricultural research; Diffusion of research; Evaluation; Research and Development/Tech Change/Emerging Technologies; C10; A50.
Ano: 2006
URL: http://purl.umn.edu/56101

CIMMYT's Maize Program Overview
Provedor de dados: 31
Autores: Cantrell,   Ronald.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 1988
URL: http://purl.umn.edu/50672

Cipó-vick: adaptação do uso tradicional comparado à fosfina no controle do gorgulho-do-milho em paióis.
Provedor de dados: 14
Autores: FAZOLIN, M.; COSTA, C. R. da; CAVALCANTE, A. S. da S.; ESTRELA, J. L. V.; ALBUQUERQUE, E. S. de; DAMACENO, J. E. de O.
O Bioma Amazônia é reconhecido por sua relevância para o clima global e por sua alta biodiversidade, a qual apresenta imenso potencial para a produção de compostos secundários de plantas, que têm sido demandados tanto pela indústria, como também para uso nos cultivos orgânicos. Na transformação sustentável dessa biodiversidade, muitas vezes são obtidos produtos de aplicação prática na agropecuária, destacando-se os inseticidas botânicos. Nesse contexto faz-se necessário, na maioria das vezes, recorrer aos conhecimentos tradicionais, pela maneira peculiar como são construídos e passados às gerações que se sucedem. Mesmo considerando que houve, nas últimas duas décadas, incremento significativo de ações de pesquisa e desenvolvimento para obtenção de...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Inseticida botânico; Kangàrà kanê; Cipó vick; Tanaecium nocturnum; Benzaldeído; Ácido cianídrico; Mandelonitrila; Maize weevil; Gorgojo del maíz; Maiz; Plagas de plantas.; Sithophillus zeamais; Zea mais; Aceites essenciales; Benzaldehído; Cianuro de hidrógeno; Control químico; Granos almacenados; Insecticidas botánicos; Praga de planta; Praga de produto armazenado; Inseto; Milho; Gorgulho dos cereais; Inseticida; Controle químico; Fosfina; Controle biológico; Óleo essencial; Ácido prússico.; Plant pests; Corn; Stored grain; Chemical control; Phosphine; Botanical insecticides; Benzaldehyde; Hydrogen cyanide.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/661865

Clasificación integral de sistemas de cultivo minifundistas irrigados = Classification of small-farm irrigated cropping systems
Provedor de dados: 32
Autores: Fortanelli Martínez, Javier; Figueroa Sandoval, Benjamín; González Cossío, Felix Valerio.
En este trabajo se ensaya la aplicación de un principio integral para la clasificación de sistemas de cultivo minifundistas irrigados por bombeo. Se utiliza como herramienta estadística básica el análisis multivariado, con base en las técnicas de componentes principales, de correlación canónica y de conglomerados. Los criterios de clasificación utilizados, acordes con el enfoque integral de la agricultura, son técnicos, económicos y de orientación productiva. Los resultados señalan la existencia hipotética de cinco sistemas de cultivo ubicados dentro de una tendencia que va de aquellos que cultivan principalmente maíz (Zea mays L.) y frijol (Phaseolus vulgaris L.) con técnica tradicional, bajos costos de producción e intenso uso de la fuerza de trabajo...
Tipo: Artículo
Palavras-chave: Sistemas de cultivo; Análisis multivariado; Zea mays; Phaseolus vulgaris; Farming systems; Multivariate analysis; Análisis estadístico; Statistical analysis.
Ano: 2012
URL: http://hdl.handle.net/10521/1753

CLIMATE CHANGE AND GRAIN PRODUCTION IN THE UNITED STATES: COMPARING AGRO-CLIMATIC AND ECONOMIC EFFECTS
Provedor de dados: 31
Autores: Li,   Zhuang; Mount,   Timothy D.; Kaiser,   Harry M.
The analysis is based on an integrated climatic, agronomic and economic model of grain production in the midwestern region of the U.S. The model represents a typical farm and the objective is to select an optimum combination of cultivars for four crops (maize, soybean, wheat and sorghum) conditionally on climate, soil characteristics and the prices of the four crops. The first part of the analysis uses a complete two-way factorial design to estimate the effects of five climatic and agronomic variables and the four prices on yields, total production and net return. With this design, variability can be allocated uniquely to individual explanatory variables. As expected, prices have little effect on yields. For total production and net return, temperature and...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Environmental Economics and Policy.
Ano: 1995
URL: http://purl.umn.edu/6846

Climate change and prolongation of growing season: changes in regional potential for field crop production in Finland
Provedor de dados: 21
Autores: Peltonen-Sainio, Pirjo; Jauhiainen, Lauri; Hakala, Kaija; Ojanen, Hannu.
Climate change offers new opportunities for Finnish field crop production, which is currently limited by the short growing season. A warmer climate will extend the thermal growing season and the physiologically effective part of it. Winters will also become milder, enabling introduction of winter-sown crops to a greater extent than is possible today. With this study we aim to characterise the likely regional differences in capacity to grow different seed producing crops. Prolongation of the Finnish growing season was estimated using a 0.5º latitude × 0.5º longitude gridded dataset from the Finnish Meteorological Institute. The dataset comprised an average estimate from 19 global climate models of the response of Finnish climate to low (B1) and high (A2)...
Tipo: Journal paper
Palavras-chave: Crop husbandry.
Ano: 2009
URL: http://orgprints.org/16978/1/psainio.pdf

Climate risk in maize crop in the northeastern of Brazil based on climate change scenarios
Provedor de dados: 70
Autores: Silva,Vicente de P. R. da; Campos,João H. B. da C.; Silva,Madson T.
This study evaluates the impacts of climate change on the agricultural zoning of climatic risk in maize crop cultivated in the Northeastern of Brazil, based on the Intergovernmental Panel on Climate Change (IPCC) reports. The water balance model, combined with geospatial technologies, was used to identify areas of the study region where the crops could suffer yield restrictions due to climate change. The data used in the study were the time series of rainfall with at least 30 years of daily data, crop coefficients, potential evapotranspiration and duration of the crop cycle. The scenarios of the increasing of air temperature used in the simulations were of 1.5ºC, 3ºC and 5ºC. The sowing date of maize crop from January to March appears to be less affected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Global warming; Water balance; Rainfall; Agricultural zoning.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600019

Cloroplast pigments as indicators of lead stress
Provedor de dados: 70
Autores: Gomes,Silvânia M. de S.; Lima,Vera Lucia A. de; Souza,Adailson P. de; Nascimento,Joab J. V. R. do; Nascimento,Everaldo S. do.
Plants respond to environmental adversities, becoming an indicator for assessing the environment quality. In this aspect, chlorophyll contents as well, carotenoids are used as a reliable indicator to associate environmental quality and pollution, mainly regarding the toxicity of heavy metals in higher plants. So, we aimed to evaluate the content of chlorophyll a, b, and total chlorophylls and carotenoids in plants vetiver [Vetiveria zizanioides (L.) Nash], maize (Zea mays L.) cv. AG 1051, sunflower (Helianthus annuus L.) cv. BRS 122/V-2000, and castor beans (Ricinus communis L. ) cv . Northeastern BRS grown in contaminated soil with lead, with and without correction of soil pH, so they were used as indicators of metal stress by the soil. From the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heavy metal; Pollution; Photosynthesis.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000500007

CO-EXISTENCE COSTS UNDER GERMAN REGULATION - CASE STUDIES OF BT MAIZE
Provedor de dados: 31
Autores: Reitmeier,   Daniela; Menrad,   Klaus.
Paper prepared for presentation at the 10th ICABR International Conference on Agricultural Biotechnology: Facts, Analysis and Policies Ravello (Italy), June 29th to July 2nd, 2006
Tipo: Conference Paper or Presentation
Palavras-chave: Co-existence measure; GMO; Bt maize; GIS; Germany; Agricultural and Food Policy; L51; O32.
Ano: 2006
URL: http://purl.umn.edu/91329

Co-existence in maize supply chains in Spain and Switzerland
Provedor de dados: 21
Autores: Oehen, Bernadette; Costa-Font, Montserrat; Morgner, Marion; Gil, José  M.; Stolze, Matthias.
The debate about co-existence usually focuses on the situation of neighbouring farms. Organic producers take the position that co-existence affects the whole supply chain. Therefore, this paper compares the maize grain supply chains in Switzerland and Spain in order to identify which factors influence the segregation of genetically modified (GM) maize from non-GM maize, and discusses how organic production copes with the challenge of GM maize. Considerable differences exist between Spain and Switzerland with regard to grain maize as a component of animal feed. In Spain, where GM maize is grown, it is the feed industry that defines standards in the supply chains. Since the trading co-operatives are unable to supply GM-free maize, independent and separate...
Tipo: Conference paper, poster, etc.
Palavras-chave: Policy environments and social economy; Produce chain management.
Ano: 2007
URL: http://orgprints.org/10379/1/oehen%2Detal%2D2007%2DCo_existence_maize.pdf

Co-existence with GM crops: grasses, clover and fodder beet
Provedor de dados: 21
Autores: Jørgensen, R.B.; Løjtnant, C.; Andersen, N.S.; Andersen, B.A.
Co-existence with GM crops: grasses, clover and fodder beet    In 2006 the global cultivation of genetically modified crops increased with 13% and reached 102 million hectares. The GM crops cultivated are mainly soybean, maize, cotton and oilseed rape, but other modified crops are appearing, e.g. in 2006 herbicide tolerant alfalfa was commercialized in US. Also in Europe, GM crop cultivation is increasing with the largest areas in Rumania and Spain followed by Portugal, France, Germany, Czech Republic and Slovakia. To ensure that farmers and consumers can choose freely what food they want to grow and eat, national co-existence rules are now being fixed by law.   The measures to keep GM crops and NON-GM crops separated will be crop specific, because the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Regulation Values; Standards and certification Quality and evaluation of inputs Consumer issues.
Ano: 2007
URL: http://orgprints.org/11357/1/11357.rtf

Co-inoculation of Azospirillum brasilense and Herbaspirillum seropedicae in maize
Provedor de dados: 91
Autores: Dartora,Janaína; Marini,Deniele; Gonçalves,Edilaine. D. V.; Guimarães,Vandeir F.
ABSTRACT Bacteria from the genera Azospirillum and Herbaspirillum have been associated with increments in maize yield. The aim of this study was to evaluate the maize yield and nutritional content in response to inoculation with A. brasilense and H. seropediceae in association with nitrogen (N) fertilization. The experimental design was randomized blocks in a 4 x 5 factorial scheme, with four replicates. The treatments consisted of seed inoculation (control without N and inoculation, A. brasilense strain - AbV5, H. seropediceae strain - SMR1 and co-inoculation AbV5 + SMR1) and N doses (0, 40, 80, 120 and 160 kg ha-1). The following variables were evaluated: ear insertion height, ear length, ear diameter, number of rows per ear, number of grains per row,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Growth-promoting bactéria; Phytohormones.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000600545

Collection and breeding for the improvement of yield and quality of pop corn in Thailand
Provedor de dados: 106
Autores: Yupapan Chuthathong; Suranee Thongluang.
Palavras-chave: Corn; Maize; Popcorn; Yields; Quality; Collection; Breeding; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4327

Collection and breeding for the improvement of yield and quality of popcorn in Thailand
Provedor de dados: 106
Autores: Yupapan Chuthathong; Suranee Thongluang.
Palavras-chave: Corn; Maize; Popcorn; Breeding; Yields; Quality; ข้าวโพด; ข้าวโพดคั่ว; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4283

Collection and spore production by pot culture of vesicular arbuscular mycorrhizal fungi of corn
Provedor de dados: 106
Autores: Poonpilai Suwanarit; Rapeepun Chewatanaruk; Natteewan Poonwan; Charan Chettanachitara; Amara Chantanao.
6 ill.
Palavras-chave: Corn; Maize; Mycorrhiza; Vesicular arbuscular mycorrhiza; Fungi; Pot culture; Spore production; ข้าวโพด; ไมคอร์ไรซา; การทดลองในกระถาง.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4093

Collective Action for the Conservation of On-Farm Genetic Diversity in a Center of Crop Diversity: An Assessment of the Role of Traditional Farmers’ Networks
Provedor de dados: 31
Autores: Badstue,   Lone B.; Bellon,   Mauricio R.; Berthaud,   Julien; Ramirez,   Alejandro; Flores,   Dagoberto; Juarez,   Xochitl; Ramirez,   Fabiola.
This project explored the possible role of collective action among small-scale farmers in managing and maintaining genetic resources in a center of crop diversity. It focused on the local institutions that ensure the supply of seed of diverse maize landraces to small-scale farmers in the Central Valleys of Oaxaca, Mexico. The key hypothesis was that the medium-to-long-term supply of a diverse set of varieties to any individual smallscale maize farmer depends on an agreement among a group of farmers to manage and supply the seed of these landraces to each other, if the need arises, and that this constitutes a form of collective action. Six communities were studied, three of them indepth. Methodologies used included in-depth semi-structured interviews with...
Tipo: Working or Discussion Paper
Palavras-chave: Maize; Small-scale farmers; Informal seed systems; Genetic resources; Mexico; Collective action; Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/50067

Combined energy and feed production by thermophilic digestion of grass, maize and cattle manure
Provedor de dados: 21
Autores: Falconi, S.; Raju, C.S.; Møller, Henrik B.; Wardv, A.J.
Combined energy and feed production by thermophilic digestion of grass, maize and cattle manure
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring Crop health; Quality; Protection.
Ano: 2009
URL: http://orgprints.org/19022/3/19022.pdf

Combined energy and feed production by thermophilic digestion of manure, grass and maize silage
Provedor de dados: 21
Autores: Falconi, S; Møller, Henrik B.; Ward, A.
By anaerobic digestion of crops and manure it is possible to produce energy, organic fertilizers and good quality feed with a high content of amino acids. This can be one solution to solve the problems concerning the competition between food and energy crops. At the same time, the production of energy by anaerobic digestion limits the use of fossil fuels.   In this study the productive performance of maize and grass silage in terms of biogas and CH4 yield was analysed. The variation of amino acids content of these crops and of cattle and pig manure by anaerobic digestion was studied also.
Tipo: Conference paper, poster, etc.
Palavras-chave: Air and water emissions.
Ano: 2009
URL: http://orgprints.org/18995/1/Poster_Sebastiano_Aljw4.ppt

Combining ability analysis for grain filling duration and yield traits in spring wheat (Triticum aestivum L. em. Thell.)
Provedor de dados: 74
Autores: Kamaluddin,; Singh,Rishi M.; Prasad,Lal C.; Abdin,Malik Z.; Joshi,Arun K.
A diallel analysis of wheat (Triticum aestivum L. em. Thell) parents (n = 11) and their F1 (n = 55) and F2 (n = 55) offspring was carried out for the following four traits: grain filling duration (GFD), GFD for growing degree days (GDD), 1000 seed weight and seed yield per plant. Analysis of variance for general combining ability (GCA) and specific combining ability (SCA) displayed significant F1 and F2 general and specific combining ability effects for the four traits studied. For all the traits the GCA effects were relatively more important than the SCA effects, indicating that additive genetic effects were predominant. Crosses displaying high SCA effects for grain filling duration, seed weight and yield were observed to be derived from parents having...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wheat; Combining ability; GCA; SCA; Grain filling duration.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300018

Combining ability from diallel cross of 14 inbred line GASORN popcorn
Provedor de dados: 106
Autores: Pigoonthong Chueadoongpui; Kitti Boonyalesnirun; Tavat Lavapauraya.
Palavras-chave: Corn; Maize; Popcorn; Inbred line; Diallel cross; Combining ability; GASORN popcorn; ข้าวโพด; ข้าวโพดคั่ว; การผสมพันธุ์แบบพบกันหมด; สายพันธุ์แท้; สมรรถนะการผสมพันธุ์.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4279

Combining ability of flint corn inbred lines: Mal de Río Cuarto disease tolerance and grain yield
Provedor de dados: 85
Autores: Borghi,ML; Ibañez,MA; Bonamico,NC; Kandus,MV; Almorza Gomar,D; Guillin,EA; Salerno,JC; Di Renzo,MA.
Mal de Río Cuarto (MRC) disease is a significant threat to corn production in Argentina. Sixty six hybrid combinations derived from the cross of twelve flint maize (Zea mays L) inbred lines were evaluated using a completely randomized block design with two replications. MRC disease severity grade (SG) and grain yield (GY) were the analyzed traits. Our objectives were to estimate the general (GCA) and specific (SCA) combining abilities for these traits among twelve corn inbred lines, and to identify potential heterotic relationships among them. Diallel crosses were performed and these results were compared using Griffing's method 2 model I and diallel GGE biplot (genotype main effect plus genotype x environment interaction). Highly significant effects for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L; Diallel crosses; GGE biplot; Combining ability.
Ano: 2012
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572012000100017

Combining ability of inbred lines of maize and stability of their respective single-crosses
Provedor de dados: 63
Autores: Aguiar,Aurélio Mendes; Carlini-Garcia,Luciana Aparecida; Silva,Adelmo Resende da; Santos,Mateus Figueiredo; Garcia,Antonio Augusto Franco; Souza Jr.,Cláudio Lopes de.
The utilization of diallel crosses for identification of superior combinations is a common practice in maize (Zea mays L.) breeding programs. This methodology allows the estimation of the combining ability of genotypes being evaluated. In this work, five inbred lines were evaluated as to their general (GCA) and specific (SCA) combining abilities, by using a complete diallel scheme. The single-crosses produced between these inbred lines were evaluated in seven environments, along with two checks, by using a randomized complete block design. Traits analized were: grain yield, plant height, ear height, ear placement, and prolificacy. A diallel analysis was carried out, following an adaptation of Griffing's method IV, in addition to hybrid stability and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diallel crosses; Genotype vs. environment interaction; Grain yield; Adaptability.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100013

Combining ability of maize grain yield under different levels of environmental stress
Provedor de dados: 86
Autores: Souza,Leandro Vagno de; Miranda,Glauco Vieira; Galvão,João Carlos Cardoso; Guimarães,Lauro José Moreira; Santos,Izabel Cristina dos.
The objectives of this work were to caracterize the tropical maize germplasm and to compare the combining abilities of maize grain yield under different levels of environmental stress. A diallel was performed among tropical maize cultivars with wide adaptability, whose hybrid combinations were evaluated in two sowing dates, in two years. The significance of the environmental effect emphasized the environmental contrasts. Based on grain yield, the environments were classified as favorable (8,331 kg ha-1), low stress (6,637 kg ha-1), high stress (5,495 kg ha-1), and intense stress (2,443 kg ha-1). None of the genetic effects were significant in favorable and intense stress environments, indicating that there was low germplasm variability under these...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; Breeding; Diallel; Drought.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001000013

Combining ability of maize inbred lines evaluated in three environments in Brazil
Provedor de dados: 63
Autores: Nass,Luciano Lourenço; Lima,Marlene; Vencovsky,Roland; Gallo,Paulo Boller.
For tropical areas like Brazil, genotype x environment interaction is an important source of variation. Our objectives were to examine the combining abilities and their interaction with environments in ten selected maize (Zea mays L.) inbred lines in diallel crosses and to identify candidates for promising hybrid combinations. Crosses and checks were evaluated through a 7 x 7 triple lattice design at three locations during the 1984/85 season. Several agronomic traits were evaluated, but here only data on ear yield are discussed. Yield data were adjusted for stand variation (correction to 50 plants per plot) and grain moisture (15.5%). Data for ear yield were analysed using an adaptation of Griffing’s method IV for complete diallel crosses, and experiments...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diallel analysis; Combining ability; Genotype x environment interaction.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000100021

Combining ability of physiological traits in forrage maize
Provedor de dados: 64
Autores: Redivo,Greice Daiane Rodrigues Gomes; Faria,Marcos Ventura; Rosa,Jocimar Costa; Ono,Elizabeth Orika; Rodrigues,João Domingos; Adriano,Elisa.
ABSTRACT The exploitation of the existing genetic variability for the physiological traits related to the yield and quality of maize forage can assist in the development of superior inbred lines and hybrids. The objective of this work was to evaluate the general and the specific combining ability and the nature of gene effects of physiological and chemical traits of forage maize genotypes. Two groups of genotypes and 16 hybrids resulting from a 4x4 partial diallel scheme were evaluated. Group I consisted of two commercial hybrids (AG8025, P30B39) and two elite inbred lines (LEM2 and LEM3). Group II consisted of four experimental inbred lines originated from different populations of forage maize breeding program. In total, 24 treatments were evaluated,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CO2 assimilation; Stomatal conductance; Internal CO2 concentration; Water efficiency; Gaseous exchanges.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100246

Combining ability of tropical maize cultivars in organic and conventional production systems
Provedor de dados: 65
Autores: Oliveira,Lucimar Rodrigues de; Miranda,Glauco Vieira; DeLima,Rodrigo Oliveira; Souza,Leandro Vagno de; Galvão,João Carlos Cardoso; Santos,Izabel Cristina dos.
The objectives were to identify maize germplasm for the organic productions system and to compare the genetic effects of the grain yield of maize cultivars in organic and conventional production systems. Diallel crosses were made between six maize cultivars and the hybrid combinations were evaluated in conventional and organic production systems. The hybrid combinations produced different grain yields in the two production systems. The interaction between general combining ability and production systems was significant for grain yield, ear height and number of ears. This indicates that the additive genetic effects differ in organic and conventional production systems. The specific combining abilities (SCA) were significant for grain yield and plant height,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Breeding; Selection; Diallel; Genotype x environment interaction.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000500001

Combining ability of twelve maize populations
Provedor de dados: 86
Autores: Vacaro,Elton; Barbosa Neto,José Fernandes; Pegoraro,Diego Girardi; Nuss,Claudio Natalino; Conceição,Leo Duc Haa.
Genetic progress depends on germplasm quality and breeding methods. Twelve maize populations and their crosses were evaluated to estimate combining ability and potential to be included as source populations in breeding programs. Plant height, point of insertion of the first ear, number of ears per plant, number of grains per ear, root and stalk lodging and grain yield were studied in two locations in Brazil, during the 1997/98 season. Genotype sum of squares was divided into general (GCA) and specific (SCA) combining ability. Results indicated the existence of genetic divergence for all traits analyzed, where additive effects were predominant. The high heterosis levels observed, mainly in Xanxerê, suggested the environmental influence on the manifestation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Germplasm; Heterosis; Genetic variation.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002000100009

Comercialização do milho.
Provedor de dados: 14
Autores: GARCIA, J. C.
bitstream/item/46637/1/Comercializacao-milho.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Maize.; Comercialização; Milho; Zea Mays.; Marketing.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476272

Comerciantes de Pequena Escala Esperam Boas Colheitas, Mas Preços ao Produtor São Baixos nas Zonas de Difícil Acesso: O Que Fazer para Incentivar a Produção e a Comercialização Agrícolas?
Provedor de dados: 31
Autores: Equipe Tecnica do SIMA.
Resultados das Investigações do SIMA- Departamento de Estatística e Departamento de Análise de Políticas MINAG - Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Crop Production/Industries; Marketing; Q18.
Ano: 2006
URL: http://purl.umn.edu/55251

Comment on &amp;#8220;Equilibrium sorption isotherm studies of Cd(II), Pb(II) and Zn (II) ions detoxification from waste water using unmodified and EDTA-modified maize husk&amp;#8221;
Provedor de dados: 69
Autores: Cavas,Levent.
The citing and using of correct version of mathematical equations are of great importance in the writing of a scientific paper. This paper presents the possible errors related to Dubinin-Radushkevich Equation in an article by Igwe and Abia (2007) which was published in Electronic Journal of Biotechnology, 10(4); 536-548.
Tipo: Journal article
Palavras-chave: Adsorption; Calculation errors; DR equation.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000200001

Commercial scale experiment on exploitation of chemicals for inhibiting growth of Aspergillus flavus
Provedor de dados: 106
Autores: Prawat Tonboon-Ek; Dara Buangsuwon; Kanjana Bhudhasamai; Somkiat Titatarn.
Palavras-chave: Corn; Maize; Aflatoxins; Fungicides; Seed; Propionic acid; Ammonium bis propionate; ข้าวโพด; สารกำจัดเชื้อรา; แอสเปอร์จิลลัส.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4577

Commercialization of sorghum milling in Botswana: trends and prospects
Provedor de dados: 30
Autores: D.
Palavras-chave: Sorghum; Husking; Grain; Retail marketing; Cereals; Marketing boards; Markets; Prices; Maize; Subsidies.
Ano: 2000
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4221

Communities of arbuscular mycorrhizal fungi in arable soils are not necessarily low in diversity
Provedor de dados: 21
Autores: Hijri, Isabelle; Sýkorová, Zuzana; Oehl, Fritz; Ineichen, Kurt; Mäder, Paul; Wiemken, Andres; Redecker, Dirk.
Communities of arbuscular mycorrhizal fungi (AMF) in five agricultural field sites of different management intensities were studied. Variable regions of the ribosomal RNA genes were used to detect and identify AMF directly within colonized roots. Roots from a continuous maize monoculture showed low AMF diversity, in agreement with previous reports on molecular diversity of AMF in agricultural soils. In contrast, a substantially higher diversity of AMF was found throughout the long term `DOK' field experiment, where organic and conventional agricultural practices have been compared side by side since 1978. In this experiment, a 7-year crop rotation is performed under lower levels of inorganic fertilizer input and chemical pest control. These results are in...
Tipo: Journal paper
Palavras-chave: Soil biology; Soil quality.
Ano: 2007
URL: http://orgprints.org/13462/1/hijri%2Detal%2D2006%2Dmolecular_ecology%2Dvol15%2D2277%2D89.pdf

Como controlar pragas do milho.
Provedor de dados: 14
Autores: CRUZ, I.; SANTOS, J. P.; WAQUIL, J. M.
bitstream/item/43941/1/Como-controlar.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Pragas; Controle; Pest; Control; Maize.; Milho; Zea Mays.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476258

Como Será a Colheita e Comercialização de Culturas Alimentares em Moçambique em 2004/05? Resultados de Algumas Constatações no Centro e Norte de Moçambique.
Provedor de dados: 31
Autores: Equipe Tecnica do SIMA.
Resultados das Investigações do SIMA-Dest e Departamento de Análise de Políticas MADER-Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Marketing; Q18.
Ano: 2004
URL: http://purl.umn.edu/55238

Compaction of plant biomass for solid biofuels production
Provedor de dados: 190
Autores: Protásio, Thiago de Paula; Alves, Isabel Cristina Nogueira; Trugilho, Paulo Fernando; Silva, Vinícius Oliveira; Baliza, Ana Elisa Rodarte.
This research aimed to evaluate briquettes made from coffee husk, eucalyptus sawdust and maize harvesting residues, and the influence of post compaction interval on some properties of the briquettes. After oven drying of the biomass, the briquettes were produced in a laboratory briquetting machine at 120 ºC and 15 MPa. Bulk density and heating value of the fresh biomass were analyzed. After compaction, influence of time on moisture content, volumetric expansion an bulk density of the briquettes was analyzed. From the results, it was observed that milled coffee husk had the highest mean value of bulk density. There was no statistical difference for higher heating value among the biomass analyzed. The effect of pos compaction interval was significant on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Briquettes; Energetic density; Dimensional variation Briquetes; Densidade energética; Variação volumétrica.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/288

Comparative analysis of genetic diversity among the maize inbred lines (Zea mays L.) obtained by RAPD and SSR markers
Provedor de dados: 52
Autores: Souza,Silvia Graciele Hülse de; Carpentieri-Pípolo,Valéria; Ruas,Claudete de Fátima; Carvalho,Valdemar de Paula; Ruas,Paulo Maurício; Gerage,Antônio Carlos.
The RAPD and SSR markers were used to compare the genetic diversity among the 16 maize inbred lines. Twenty-two primers were used in the RAPD reactions, resulting in the amplification of 265 fragments, while 16 pairs of SSR primers resulted in 75 fragments. The similarity based on Dice coefficient for the RAPD ranged from 53 to 84% and for the SSR from 11 to 82%. The dendrogram obtained by the RAPD showed five groups, while dendrogram obtained by the SSR showed three groups and one isolated line. The association constructed from the markers and the principal coordinate’s analysis separated lines into two groups according to endosperm color, either orange or yellow. The RAPD were effective to validate pedigree data, while the SSR were effective to recognize...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn; Distance genetic; Microsatellites; Molecular markers; Polymorphism; RAPD.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100022

Comparative Economic and Gender, Labor Analysis of Conservation Agriculture Practices in Tribal Villages in India
Provedor de dados: 31
Autores: Lai,   Cynthia; Chan,   Catherine; Halbrendt,   Jacqueline; Shariq,   Linsey; Roul,   Pravat; Idol,   Travis; Ray,   Chittanrajan; Evensen,   Carl.
The International Food and Agribusiness Management Review is published quarterly by IFAMA. www.ifama.org
Tipo: Article
Palavras-chave: India; Conservation agriculture; Gender; Labor; Maize; Cowpea; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Land Economics/Use; Productivity Analysis; Q.
Ano: 2012
URL: http://purl.umn.edu/120859

Comparative effects of urea and ammonium sulfate on maize grown on reddish brown lateritic soil
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Traisuda Waitruadrok.
Palavras-chave: Corn; Maize; Corn growth stage; Urea; Ammonium sulfate; Lateritic soil; ข้าวโพด; การเจริญเติบโต; ปุ๋ย; ยูเรีย; อะลูมิเนียมซัลเฟต; ดินชุดปากช่องสีแดง.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4398

COMPARATIVE EVALUATION OF MESH SIEVE PERFORMANCE OF A WET CEREAL SLURRY SIEVING MACHINE
Provedor de dados: 111
Autores: Anyanwu, Cosmas; Ibelegbu, Charity; Ugwu, Chinyere; Okonkwo, Valentine; Mgbemene, Chigbo.
This paper presents the design, construction and comparative performance evaluation a cereal slurry sieving machine. For the evaluation, wet slurries of maize, millet and sorghum were each sieved with three sieves of mesh sizes of 1.19 mm, 1.00 mm and 0.354 mm. The machine performed satisfactorily in the sieving of wet maize slurry, recording an efficiency of 85%. The output capacity was 22.07 kg/hr in comparison with 8.82 kg/hr achieved in the traditional manual method. The average sieving time for 1kg of maize slurry using the machine was about 2.5 times shorter than in manual sieving. The sieving capacity of the machine was about 2.4 times higher than that of the traditional manual method. The Analysis of Variance (ANOVA) carried out on the results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cereal; Slurry; Machine design; Sieving capacity; Mesh size; Efficiency.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5737

Comparative genome analysis of the SPL gene family reveals novel evolutionary features in maize
Provedor de dados: 74
Autores: Peng,Xiaojian; Wang,Qianqian; Zhao,Yang; Li,Xiaoyu; Ma,Qing.
Abstract SPLs are plant-specific transcription factors that play important regulatory roles in plant growth and development. Systematic analysis of the SPL family has been performed in numerous plants, such as Arabidopsis, rice, and Populus. However, no comparative analysis has been performed across different species to examine evolutionary features. In this study, we present a comparative analysis of SPLs in different species. The results showed that 84 SPLs of the four species can be divided into six groups according to phylogeny. We found that most of the SPL-containing regions in maize showed extensive conservation with duplicated regions of rice and sorghum. A gene duplication analysis in maize indicated that ZmSPLs showed a significant excess of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: SPL; Phylogenetic relationship; Gene duplication; MiR156 expression.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000300380

Comparative physical and economic yields on traditional and newly opened areas: Local and recommended maize varieties
Provedor de dados: 106
Autores: Sarun Wattanutchariya; Somporn Isavilanonda.
7 tables
Palavras-chave: Corn; Maize; Varieties; Local variety; Recommended variety; Physical yields; Economic yields; Traditional areas; Newly opened area; ข้าวโพด; ผลผลิตทางกายภาพ; ผลผลิตทางเศรษฐศาสตร์.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3996

Comparative promotion program with private sectors on hybrid seed utilization in corn and sorghum promotion in 1992
Provedor de dados: 106
Autores: Somsak Suriyo.
Palavras-chave: Corn; Maize; Sorghum; Promotion program; Hybrid seed; Utilization; ข้าวโพด; ข้าวฟ่าง; การส่งเสริม; เมล็ดพันธุ์; ลูกผสม.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4515

Comparative responses of four recommended corn cultivars to soil fertility
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sukum Chotechuangmanirat.
4 ill., 1 table
Palavras-chave: Corn; Maize; Soil fertility; Composite variety; Hybrids; ข้าวโพด; พันธุ์; ระดับความอุดมสมบูรณ์ของดิน; การตอบสนอง.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4596

Comparative responses of four recommended corn cultivars to soil fertility
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sodsai Changsaluk.
6 ill.
Palavras-chave: Corn; Maize; Soil fertility; Fertilizers; ข้าวโพด; ปุ๋ย; ความอุดมสมบูรณ์ของดิน.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4248

Comparative studies among some soil management practices on growth and yield of corn
Provedor de dados: 106
Autores: Prasop Virakornphanich; Samnao Phetchawee.
Palavras-chave: Corn; Maize; Soil management; Fertilizers; Growth; Yields; ข้าวโพด; การจัดการดิน; อัตราการเจริญเติบโต; การเพาะปลูก.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4060

Comparative studies of the adaptability, production and segregating behavior of the indigenous and a newly-introduced Guatemala corn varieties
Provedor de dados: 106
Autores: Jinda Jan-orn; Chamnan Tonglad; Wachari Suwanwihok; Amphorn Benponk; Breitenbach, C.A.; Slearmlarp Wasuwat.
5 tables
Palavras-chave: Corn; Maize; Corn adaptability; Corn production; Segregating behavior; Guatemala corn; Varieties; ข้าวโพด; ความสามารถในการปรับตัว; การผลิต; การกระจายตัวทางพันธุกรรม; พันธุ์กัวเตมาลา.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3728

Comparative toxicity of medicine herbs and insecticides against corn thrips, Frankliniella williamsi Hood. On super sweet corn
Provedor de dados: 106
Autores: Sawarng Charoenying; Mallica Kaewwises; Tawil Nilpayak.
2 tables
Palavras-chave: Corn; Maize; Sweet corn; Thrips; Frankliniella williamsi; Toxicity; Medicine herbs; Insecticides; ข้าวโพด; ข้าวโพดหวาน; เพลี้ยไฟ; สารสกัดจากพืช; สารเคมีฆ่าแมลง; ความเป็นพิษ.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4309

Comparative toxicity of medicine herbs and insecticides against the thrips, Frankliniella  williamsi Hood
Provedor de dados: 106
Autores: Sawarng Charoenying.
2 tables
Palavras-chave: Corn; Maize; Insect pests; Thrips; Medicine herbs; Insecticides; Frankliniella williamsi; ข้าวโพด; เพลี้ยไฟ; สารสกัดจากพืช; สารเคมีฆ่าแมลง; ความเป็นพิษ.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4371

Comparing Accuracy and Costs of Revealed and Stated Preferences: The Case of Consumer Acceptance of Yellow Maize in East Africa
Provedor de dados: 31
Autores: Kimenju,   Simon Chege; De Groote,   Hugo; Morawetz,   Ulrich B.
For quite a while, stated preferences have been a major tool to measure consumer preferences for new products and services. Revealed preference methods, in particular experimental economics, have gained popularity recently because they have been shown to be more incentive compatible, and therefore more accurate. However, this advantage comes at the expense of higher survey costs. In the developing countries with limited funding for research, it is important to determine whether the extra cost can be justified by the extra gain in accuracy. A survey of 100 farmers was carried out in Western Kenya to determine consumer preference for yellow maize using the contingent valuation, choice experiments and experimental auction methods. Experimental auctions...
Tipo: Conference Paper or Presentation
Palavras-chave: Kenya; Maize; Consumer; Experimental auctions; Stated preference; WTP; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; D6; Q12.
Ano: 2006
URL: http://purl.umn.edu/25642

COMPARING THE PROFITABILITY OF CASSAVA-BASED PRODUCTION SYSTEMS IN THREE WEST AFRICAN COUNTRIES: COTE D'IVOIRE, GHANA AND NIGERIA
Provedor de dados: 31
Autores: Camara,   Youssouf; Staatz,   John M.; Crawford,   Eric W.
Sub-Saharan Africa (SSA) cassava-producing countries such as Nigeria, Ghana, and Côte d'Ivoire have developed, in recent years, a renewed interest in cassava as an alternative food crop.  This has led to a major expansion in cassava-based production systems in Nigeria and Ghana, whereas there has been a slower growth in Côte d'Ivoire (Nweke et al., 1998).  This paper is based on the argument that the difference in various factors such as agricultural policies (i.e., trade and price policies, domestic production taxes or subsidies), location and technologies (production and processing) between Nigeria, Ghana and Côte d'Ivoire the difference in the level of growth in cassava-based production systems.  The paper examines, using the Policy Analysis Matrix...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/11593

Comparing two versions of a non-linear model for simulating leaf number and developmental stages in maize based on air temperature
Provedor de dados: 65
Autores: Streck,Nereu Augusto; Gabriel,Luana Fernandes; Samboranha,Flavia Kaufmann; Lago,Isabel; Schwantes,Ana Paula; Schons,Alfredo.
The Wang and Engel (WE) model simulates crop development considering the non-linear response of plant development to temperature. Daily air temperature is the input for the temperature response function [f(T)] in the WE model, and because there are several approaches for computing daily temperatures, there are several ways to calculate the f(T). The objective of this study was to compare two versions of the WE model for simulating leaf number and developmental stages in maize, considering two approaches for imputing daily air temperature (daily mean air temperature and daily minimum/maximum air temperature). A two-year field experiment with the maize variety BRS Missões sown in several sowing dates was conducted in Santa Maria, Rio Grande do Sul State,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop models; Zea mays; Leaf number; Phenology.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000300003

Comparing Yields and Profitability in MADER's High- and Low-Input Maize Programs: 1997/98 Survey Results and Analysis
Provedor de dados: 31
Autores: Howard,   Julie A.; Jeje,   Jose Jaime; Kelly,   Valerie A.; Boughton,   Duncan.
Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambique
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Food policy; Mozambique; Maize; Crop Production/Industries; Q18.
Ano: 2000
URL: http://purl.umn.edu/56038

Comparing Yields and Profitability in MARD's High- and Low-Input Maize Programs 1997/98 Survey Results and Analysis
Provedor de dados: 31
Autores: Howard,   Julie A.; Jeje,   Jose Jaime; Kelly,   Valerie A.; Boughton,   Duncan.
This paper summarizes the results from data collected during the study’s second year,  1997/98. The analysis is based on a sample of 210 smallholder farmers in Nampula Province using  three different sets of production practices:  the DNER/Sasakawa- Global 2000 Program (DNER/SG)  high-input package (improved open-pollinated maize, 100 kg/ha each 12-24-12 and urea fertilizer  on credit); improved planting and weeding practices only (using local seed, without fertilizer);  and a control group of farmers using traditional practices (no improved seed or fertilizer). The  objectives of the research were to: describe the characteristics, input use patterns and yield  response by group; analyze the relative contribution to yield of the different technologies,...
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Maize; Crop Production/Industries; Q18.
Ano: 2000
URL: http://purl.umn.edu/55217

Comparison between qualities and consumer preference of different baby corn varieties for canning
Provedor de dados: 106
Autores: Kulvadee Trongpanich.
6 tables
Palavras-chave: Corn; Maize; Baby corn; Quality; Consumer preference; ข้าวโพด; ข้าวโพดฝักอ่อน; พันธุ์; คุณภาพ; การบรรจุกระป๋อง.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4316

Comparison between THE oven and THE Karl Fischer methodS for THE determination of the moisture content of maize (Zea mays L.) and soya (Glycine max (L) Merrill) seeds
Provedor de dados: 63
Autores: TILLMANN,M.A.A; CICERO,S.M.
The objective of the present paper was to compare the seed water content of maize and soya, obtained by the oven method at different temperatures and the Karl Fischer method. The water contents used were 11.2 %, 12.8 % and 16.2 % for maize and 10.7 %, 12.4 % and 16.0 % for soya. Samples were dried for a sufficiently long time in order to obtain the same results in both methods. The results indicate that the official method for seed moisture determination (105oC oven method) should be revised in order to obtain more reliable results. The drying time in the oven varied according to the seed water content and the temperature used.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed; Moisture content; Karl Fisher.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161996000100009

Comparison of aflatoxin detection by ELISA and TLC
Provedor de dados: 106
Autores: Pranee Hamelink; Chintana Chana; Ronnapop Bunjoedchoedchu; Chiradej Chamswarng.
8 tables
Palavras-chave: Corn; Maize; Peanuts; Aflatoxins; Elisa method; TLC method; ข้าวโพด; ถั่วลิสง; อาหารสัตว์; อะฟลาทอกซิน; อีไลซา; ทีแอลซี.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4303

Comparison of carbon and nitrogen determination methods for samples of a Paleudult subjected to no-till cropping systems
Provedor de dados: 63
Autores: Dieckow,Jeferson; Mielniczuk,João; Knicker,Heike; Bayer,Cimélio; Dick,Deborah Pinheiro; Kögel-Knabner,Ingrid.
Organic carbon (C) concentration evaluated by the Walkley-Black method, and total nitrogen(N)concentration determined by Kjeldahl method, were compared with corresponding results of C and N concentrations obtained through the dry combustion method (Elementar Vario EL analyzer), using samples of ten soil layers down to the depth of 107.5 cm of a kaolinitic Typic Paleudult (220-418 g clay kg-1 along the profile) subjected to no-till cropping systems [fallow bare soil, pigeon pea (Cajanus cajan L. Millsp.) plus maize, and lablab (Lablab purpureum L. Sweet) plus maize]. A close correlation (R² &gt; 0.96) was observed between the C results of the Walkley-Black and dry combustion methods, but a correction was suggested to be applied to C results of Walkley-Black...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Walkley-Black; Kjeldahl; Wet combustion; Dry combustion.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000500011

Comparison of effect of zinc-enriched pod of Phaseolus vulgaris and inner rice husk composts with zinc sulphate and zinc 14% chelate on zinc availability in maize plant in a calcareous soil
Provedor de dados: 21
Autores: Rasouli, Mrs. Shabnam; Azizi, Prof. Pirouz; Forghani, Dr. Akbar; Asghar Zade, Dr. Ahmad.
Mixtures of Zn salts and organic matter have been used successfully in controlling zinc deficiency in various crops. The aim of the present study was to optimize the effectiveness, on zinc availability in maize, of natural organic substances by enriching them with zinc sulfate. For this purpose pod of Phaseolus vulgaris and inner rice husk, as abundant organic wastes in the north of Iran, were incubated with increasing quantities of zinc sulphate. The effect of these zinc-enriched composts, zinc sulphate, and zinc 14% chelate on zinc availability in maize in a calcareous soil was studied in a greenhouse experiment. DTPA-extractable zinc of the soil, total zinc concentration, and chlorophyll of plant leaves were measured. Soil applications of all...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2008
URL: http://orgprints.org/12318/1/Rasouli_12318_ed.doc

Comparison of feeding values among yellow corn, white Hegari sorghum and brown IS 8719 sorghum in broiler rations
Provedor de dados: 106
1 table
Palavras-chave: Broiler chickens; Corn; Maize; Sorghum; Yellow corn; White hegari sorghum; Brown IS 8719; Feeding value; Rations; ข้าวโพด; ข้าวฟ่าง; ข้าวโพดเหลือง; พันธุ์เฮกการี่; คุณค่าทางอาหารสัตว์; ข้าวฟ่างสีน้ำตาล; สูตรอาหาร; ไก่กระทง.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3808

Comparison of isozyme transformation in maize as a result of insertion of the chitinase gene
Provedor de dados: 85
Autores: Yan,PM; Zhang,HF; Wang,Q; Yan,XY; Sun,Y.
Isozymes of peroxidase (POD), catalase (CAT), esterase (EST) and superoxide dismutase (SOD) were analyzed on transgenic maize (with external chitinase gene) and its parent by vertical polyacrylamide gel electrophoresis (PAGE). This study was made using shoots at the fourth leaf stage. Results showed that: POD and EST were detected in 6 bands. POD-2 and POD-3 were present at the bud and seedling stages. POD-1, POD-4, POD-5 and POD-6 were only present at the seedling stage. POD-6 expressed stronger in the transgenic maize with chitinase than in its parent. EST-2 was present only at the bud stage, and its expression in transgenic maize was stronger than that in its parent. EST-5 only existed at the seedling stage. EST-4 did not exist in the parent maize...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chitinase; Isozyme; Maize; Antioxidant enzyme system.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200002

Comparison of metering mechanisms of corn seed
Provedor de dados: 70
Autores: Weirich Neto,Pedro H.; Justino,Altair; Namur,Rodrigo T.; Domingues,José; Garcia,Luiz C.
It was compared the performance of the metering mechanism of corn seeds (Zea mays) in direct seeding in an area of ​​200 ha, a property in Piraí do Sul, State of Paraná - PR, in Brazil. It was seeded 4 maize hybrids, 50 ha of each, with seeds of different sieves. The experiment was conducted in a randomized block design (RBD), with 3 treatments and 9 repetitions for each corn hybrid. The treatments were the pneumatic seed of metering mechanisms, horizontal perforated disc with and without ramp®. The plots were 40 m² and were distributed at the early, middle and late sowing. The variables analyzed in each corn hybrid were initial population, faulty spacing, multiple spacing, acceptable spacing, and yield components. As there were no significant differences...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pneumatic system; Horizontal seed plate; Disc with ramp®.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000500017

Comparison of nutrition composition of transgenic maize (chitinase gene) with its non-transgenic counterpart
Provedor de dados: 118
Autores: Ping-mei,Yan; Yu-kui,Rui; Xiao-yan,Yan; Zheng,Chai; Qing,Wang; Jian-zhong,Du; Yi,Sun.
In order to compare the nutrition components of transgenic maize seeds (chitinase gene), achieved by the pollen-mediated approach, with its non-transgenic counterpart, Vitamin B1, vitamin B2, fatty acids and essential amino acids of transgenic maize seeds and their counterparts were analyzed by the Chinese national standard methods or AOAC methods. The results showed that the contents of all the six kinds of fatty acids detected in transgenic maize seeds were significantly higher than those in their non-transgenic counterpart, the content of vitamin B2 in transgenic maize was significantly lower than that in non-transgenic maize seeds, the content of total amino acids in transgenic maize seed was higher than that in non-transgenic maize seeds, while...
Tipo: Journal article
Palavras-chave: Transgenic maize; Nutrition; Fatty acids; Essential amino acids; Vitamin; Chitinase gene.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100014

Comparison of organic and conventional farming system in term of energy efficiency
Provedor de dados: 21
Autores: Klimeková, M.; Lehocká, Z.
The aim of this study was to compare the energy use in cereal crop rotation in conventional and organic farming system in terms of additional energy inputs, gross energy production, energy profit and energy efficiency evaluation in years 2003 – 2005 in the stationary field experiment established on degraded Chernozem on loess in a maize – barley growing region in south west Slovakia (near Piešťany town).  Increased energy inputs caused the increase of production in the Conventional Farming System. The Conventional System was more energy demanding (about 52.5%) in comparison with the ecological one. The most energy demanding crops were those amended by farm yard manure: maize for grain (21.31 GJ ha-1in the organic system, 34.18 GJ ha-1in the conventional...
Tipo: Conference paper, poster, etc.
Palavras-chave: Environmental aspects.
Ano: 2007
URL: http://orgprints.org/9841/1/9841_Klimekov%C3%A1_Poster.pdf

Comparison of RAPD, RFLP, AFLP and SSR markers for diversity studies in tropical maize inbred lines
Provedor de dados: 74
Autores: Garcia,Antonio A. F.; Benchimol,Luciana L.; Barbosa,Antônia M. M.; Geraldi,Isaias O.; Souza Jr.,Cláudio L.; Souza,Anete P. de.
In order to compare their relative efficiencies as markers and to find the most suitable marker for maize diversity studies we evaluated 18 inbred tropical maize lines using a number of different loci as markers. The loci used were: 774 amplified fragment length polymorphisms (AFLPs); 262 random amplified polymorphic DNAs (RAPDs); 185 restriction fragment length polymorphisms (RFLPs); and 68 simple sequence repeats (SSR). For estimating genetic distance the AFLP and RFLP markers gave the most correlated results, with a correlation coefficient of r = 0.87. Bootstrap analysis were used to evaluate the number of loci for the markers and the coefficients of variation (CV) revealed a skewed distribution. The dominant markers (AFLP and RAPD) had small CV values...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diversity studies; Genetic distances; Maize; Molecular markers.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400019

Comparison of similarity coefficients used for cluster analysis with dominant markers in maize (Zea mays L)
Provedor de dados: 74
Autores: Meyer,Andréia da Silva; Garcia,Antonio Augusto Franco; Souza,Anete Pereira de; Souza Jr.,Cláudio Lopes de.
The objective of this study was to evaluate whether different similarity coefficients used with dominant markers can influence the results of cluster analysis, using eighteen inbred lines of maize from two different populations, BR-105 and BR-106. These were analyzed by AFLP and RAPD markers and eight similarity coefficients were calculated: Jaccard, Sorensen-Dice, Anderberg, Ochiai, Simple-matching, Rogers and Tanimoto, Ochiai II and Russel and Rao. The similarity matrices obtained were compared by the Spearman correlation, cluster analysis with dendrograms (UPGMA, WPGMA, Single Linkage, Complete Linkage and Neighbour-Joining methods), the consensus fork index between all pairs of dendrograms, groups obtained through the Tocher optimization procedure and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic divergence; Heterotic groups; AFLP; RAPD; Multivariate analysis.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000100014

Comparison of testers in the selection of S3 families obtained from the UENF-14 variety of popcorn
Provedor de dados: 53
Autores: Pena,Guilherme Ferreira; Amaral Júnior,Antonio Teixeira do; Gonçalves,Leandro Simões Azeredo; Vivas,Marcelo; Ribeiro,Rodrigo Moreira; Mafra,Gabrielle Sousa; Santos,Adriano dos; Scapim,Carlos Alberto.
ABSTRACT The use of topcross has proven to be an interesting option for the maize crop; however, for the popcorn, there is little information about the choice of the appropriate tester. In this context, this study aimed to analyze four testers including two open pollinated varieties(BRS Angela and UENF-14), one topcross hybrid (IAC125) and a line (P2), to evaluate the combining ability of 50 S3 families of popcorn, obtained from the UENF-14 variety. Popcorn families were evaluated for grain yield (GY) and popping expansion (PE). The estimates of general and specific combining abilities were obtained and the discrimination of each tester through differentiation index was carried out. The testers BRS Angela (for GY) and IAC 125 (for PE) were the most...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays var. everta; Topcross; Yield; Popping expansion.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200135

Comparison of the efficiency between two sampling plans for aflatoxins analysis in maize
Provedor de dados: 58
Autores: Mallmann,Adriano Olnei; Marchioro,Alexandro; Oliveira,Maurício Schneider; Rauber,Ricardo Hummes; Dilkin,Paulo; Mallmann,Carlos Augusto.
Variance and performance of two sampling plans for aflatoxins quantification in maize were evaluated. Eight lots of maize were sampled using two plans: manual, using sampling spear for kernels; and automatic, using a continuous flow to collect milled maize. Total variance and sampling, preparation, and analysis variance were determined and compared between plans through multifactor analysis of variance. Four theoretical distribution models were used to compare aflatoxins quantification distributions in eight maize lots. The acceptance and rejection probabilities for a lot under certain aflatoxin concentration were determined using variance and the information on the selected distribution model to build the operational characteristic curves (OC). Sampling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycotoxins; Variance; Error; Characteristic operation curve; Zea mays.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100006

Comparison of the Energy and Economic Balance of Crop Production
Provedor de dados: 111
Autores: Voltr, Vaclav.
The article deals with the connection between energy and economic indicators of crop production in the Czech Republic. Herein, a procedure for the determination of energy inputs and outputs from production based on soil-climatic conditions is outlined. For basic arable crops, other possibilities using the production in the energy sector as well as in relation to soil-climatic conditions are evaluated. The article reviews the production and economic parameters of crop production for potential energy use, such as natural production, energy production, electricity and operational profit. The maximum production parameters are achieved by sugar beet and, consequently, maize for silage. Other energy-efficient crops are alfalfa and clover, but with technological...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy; Crops; Operating margin; Soil-climatic condition; Maise; Alfalfa.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5502

Comparison of yield reduction due to water constraints for field corn-Suwan 1 variety
Provedor de dados: 106
Autores: Sujee Chareonying; Yongyot Supasak; Manut Roengchai; Theeraphol Tungsombun; Tasanee Suphathara; Prayoung Nitigatekosol.
Palavras-chave: Corn; Maize; Yields; Water constraint; ข้าวโพด; การขาดน้ำ; ผลผลิต.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4590

Comparisons of organic and conventional maize and tomato cropping systems from a long-term experiment in California
Provedor de dados: 21
Autores: Kaffka, Stephen; Bryant, Dennis; Denison, Ford.
Yield differences and trends, organic matter accumulation, and the loss of nutrients to deeper soil horizons are discussed using data from organic and conventional maize/tomato cropping systems from the Long Term Research on Agricultural Systems Project (LTRAS) at the University of California, Davis.  Compared to the conventional system, higher and increasing yields of tomatoes were observed in organic systems, but lower yields of maize.  Fruit quality, measured as soluble solids, was not significantly different.  Soil organic matter increased in the organic system, but remained stable in the conventional one.  More irrigation water was used in the organic system than in the conventional one due to higher rates of infiltration, but less winter runoff...
Tipo: Conference paper, poster, etc.
Palavras-chave: Specific methods.
Ano: 2005
URL: http://orgprints.org/4384/4/4384%2DKaffka_etal_4p_revised%2Ded.pdf

Competição de cultivares de milho no Pará.
Provedor de dados: 14
Autores: BARRIGA, R. H. M. P.; MOTA, M. G. da C.; SILVA, J. F. da.
bitstream/item/60127/1/CPATU-PA26.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Alenquer; Pará; Brasil; Maize.; Competição de Variedade; Milho.; Amazonia; Yield components.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377579

Competição de cultivares de milho no Território Federal de Roraima.
Provedor de dados: 14
Autores: BARRIGA, R. H. M. P.; RIBEIRO, P. H. E.; ALVES, A. A. C.
bitstream/item/60085/1/CPATU-PA70.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Característica agronômica; Roraima; Brasil; Maize; Agronomic characteristics.; Competição de Variedade; Milho; Produtividade.; Amazonia; Yield components.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380615

Competicao de cultivares de milho precoce em Rondonia.
Provedor de dados: 14
Autores: SAMPAIO, N. F.; VIANA, F. M. P.
bitstream/item/59340/1/PA-1570-0001.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Cultivar; Competicao; Brasil; Rondonia; Maize; Cultivate.; Milho; Zea Mays.; Brazil; Corn.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/698553

Competição de cultivares de milho precoces em Ouro Preto D'Oeste.
Provedor de dados: 14
Autores: VIANA, F. M. P.; OLIVEIRA, M. A. S.; SAMPAIO, N. F.
bitstream/item/56635/1/PA-15430001.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Cultivar; Brasil; Rondonia; Ouro Preto D'Oeste; Maize; Cultivate.; Milho Precoce; Zea Mays.; Brazil; Corn.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/698526

Competição de cultivares, híbridos e compostos de milho precoce em solos de Cerrado: desenvolvimento de novos sistemas de produção e aperfeiçoamento daqueles em uso nos cerrados.
Provedor de dados: 14
Autores: BATISTA, L. A. R.
Oferecimento de opcoes varietais para milho de ciclo curto, na composicao do sistema de producao em condicoes de cerrado ja cultivados anteriormente.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize.; Cereal; Cerrado; Milho; Solo.; Soil.
Ano: 1976
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/42257

Competição de cultivares, níveis de adubação e densidade de milho, em três regiões do Estado de Minas Gerais.
Provedor de dados: 14
Autores: CORREA, L. A.; CRUZ, J. C.; SILVA, J.; OLIVEIRA, A. C. de; VIANA, A. C.; SILVA, A. F. da.
bitstream/item/36061/1/ct-4.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Fertilizacao; Praticas culturais; Densidade; Minas Gerais; Brasil; Maize; Cultural practices; Fertilization.; Milho; Variedade; Zea Mays.; Brazil; Density; Varieties.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476264

COMPETITIVE ABILITY OF MAIZE IN MIXTURE WITH CLIMBING BEAN IN ORGANIC FARMING
Provedor de dados: 21
Autores: Bavec, Franc; Živec, Urška; Grobelnik Mlakar, Silva; Bavec, Martina; Radics, Laszlo.
Intercropped crops represent an important production system in organic farming, especially maize/climbing bean mixture due to its high content of protein in bean seeds for human diet, and producing silage for ruminants. To test this hypothesis, the effects of  maize (Zea mays L.) sown as a sole crop and maize/climbing bean (Phaseolus vulgaris L. cv. Cipro) mixtures on maize plant height, maize leaf area index, bean leaf area index and grain yield were investigated in field experiments on an organic farm following accepted rules of certification. The maize/climbing bean mixture increased maize plant height as well as maize and bean leaf area and reduced maize grain yield in comparison with maize sown as sole crop, but 477.5 kg ha-1seed yield of bean sown in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2005
URL: http://orgprints.org/4214/4/4214%2DBavec_etal_4p_revised%2Ded.pdf

Competitive Ability of Santa-Maria (Parthenium hysterophorus L.) with Spring Maize
Provedor de dados: 87
Autores: REHMAN,A.; QAMAR,R.; FAROOQ,M.; QAMAR,J.; HASSAN,F.
ABSTRACT: In recent decades, allelopathy has gained considerable attention in sustainable agricultural systems. In the current situation, an attempt has been made to investigate the optimal competition period for weed control in maize. Experiments were designed in randomized complete block design and Parthenium hysterophorus was naturally infested in experimental plots during the spring season 2014 to determine the critical competition period for weed control in maize. The relations between grain yield and different competition durations were determined via regression analyses. The experiment comprised seven treatments viz, control treatment, competition for 30, 45, 60, 75, 90 and 105 days after emergence. The results suggested that a weed-free period...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competition; Weeds; Yields.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100252

Competitiveness and revealed comparative advantage in the SADC maize industry
Provedor de dados: 31
Autores: Mutambatsere,   Emelly.
This paper evaluates the production and trade trends for maize and maize products in southern Africa, individual countries’ revealed comparative advantages in producing these products, and the expected implications of freer trade in this sector. The analysis employs mainly annual bilateral trade data for the period 1996-2004, evaluated using comprehensive descriptive measures and the Revealed Comparative Advantage index. Results indicate that at least half of the countries in the SADC region are deficit producers of maize and maize products, and that only South Africa is a net exporter of all products considered. Substantial cross-hauling is observed, and the bulk of locally produced products are traded regionally, with over 90% regional bias for half of...
Tipo: Conference Paper or Presentation
Palavras-chave: Community/Rural/Urban Development; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Industrial Organization; Institutional and Behavioral Economics; International Relations/Trade; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/51996

Competitiveness of Kenyan and Ugandan Maize Production: Challenges for the Future
Provedor de dados: 31
Autores: Nyoro,   James K.; Kirimi,   Lilian; Jayne,   Thomas S.
The purpose of this study is to assess the costs of maize production in Kenya and Uganda, starting from the fact that there is no single “cost of production” for maize. Cost of production varies according to region, the type of technology package employed, farmers’ management practices, and the weather. In light of this, the study disaggregates cost of production into seven region/technology categories, five in Kenya and two in eastern Uganda, in order to compare the relative competitiveness of maize among these regions and technology packages. Variations in cost of production within each region/technology category reflect differences in farmer management practices and micro-variability in soils and rainfall.
Tipo: Working or Discussion Paper
Palavras-chave: Food Security; Food Policy; Kenya; Uganda; Maize Production; Crop Production/Industries; Q18.
Ano: 2004
URL: http://purl.umn.edu/55158

Complementary Financing for Environment in the Context of Accession – Innovative Resources: National Report Croatia. A project for the European Commission (contract 070201/2006/443879/MAR/E3)
Provedor de dados: 21
Autores: Karoglan Todorović, Sonja; Znaor, Darko.
This publication is a part of a five case studies exploring the possibility to establish payment for ecosystem services (PES) schemes for biodiversity conservation in two new EU  Member States and three candidate countries, namely Bulgaria, Croatia, Former Yugoslavian Republic of Macedonia, Romania and Turkey. The report forms a part of a project "Complementary Financing for Environment in the Context of Accession – Innovative Resources" (070201/2006/443879/MAR/E3) that has been carried out by  the WWF Danube-Carpathian Programme and IEEP for the European Commission in 2006-2007.     The report on Croatia assesses the value and discusses possibilities of payments for ecosystem services of the Lonjsko Polje Nature Park - the largest maintained inundation...
Tipo: Report
Palavras-chave: Pasture and forage crops Farm economics Cereals; Pulses and oilseeds Social aspects Biodiversity and ecosystem services Policy environments and social economy Education; Extension and communication Landscape and recreation.
Ano: 2007
URL: http://orgprints.org/26402/7/26402.pdf

Comportamento alimentar da tilápia do Nilo (Oreochromis niloticus) frente a diferentes ingredientes alimentares
Provedor de dados: 3
Autores: Pereira-da-Silva, Elyara Maria; USP; Pezzato, Luiz Edivaldo; UNESP.
Foram avaliadas as respostas comportamentais da tilápia do Nilo (Oreochromis niloticus) frente a 14 ingredientes utilizados na alimentação de peixes: farinhas de carne, de peixe, de crisálidas, de camarão, de girassol, de algodão e de mandioca, ovo integral liofilizado, levedura de cana-de-açúcar, farelos de soja e de trigo, glúten de milho, fubá de milho e raspa de mandioca. O método utilizado foi de dupla escolha, comparando-se cada ingrediente peletizado a uma ração denominada controle. Foram empregados quatro aquários (750 litros), contendo, cada um, três alevinos e dois comedouros instalados nos cantos direito e esquerdo, sendo registradas as respostas dos animais para cada ingrediente, separadamente. Concluiu-se que as respostas comportamentais da...
Palavras-chave: 2.00.00.00-6    Ciências Biológicas comportamento alimentar; Confronto agonístico; Atratividade; Ingredientes; Tilápia do Nilo; Oreochromis niloticus 2.00.00.00-6    Ciências Biológicas.
Ano: 1999
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4436

Comportamento das cultivares de milho recomendadas para o estado de Mato Grosso do Sul, safra 1985/86.
Provedor de dados: 14
Autores: TEIXEIRA, M. do R. de O.
bitstream/item/39164/1/COT-20.-85.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cultivar; Recomendacao; Brasil; Mato Grosso do Sul; Maize.; Cerrado; Milho; Zea Mays.; Brazil; Varieties.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/233358

Comportamento de cultivares de milho em área de várzea do Amapá.
Provedor de dados: 14
Autores: CAVALCANTE, E. da S.
Visando a identificação de cultivares de milho adaptados a área de várzea do Amapá, foram conduzidos 2 ensaios sucessivos (dois cultivos), em solo Gley Pouco Humico hidromorfico, no município de Mazagão. O primeiro foi instalado em julho de 1983 (período seco) e o segundo em dezembro do mesmo ano (período seco) na mesma área. Utilizou-se um delineamento experimental do tipo blocos ao acaso com 16 tratamentos (cultivares estudadas) e 4 repetições. O espaçamento foi de 1m entre linhas e 0,4m entre plantas. Após o desbaste, feito 20 dias depois da semeadura, foram mantidas 2 plantas por cova, os ensaios foram conduzidos sem o uso de fertilizantes e corretivos. Os resultados revelaram que as maiores produtividades foram sempre obtidas na época seca e as...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Brasil; Amapá; Maize.; Milho; Variedade; Zea Mays.; Várzea; Brazil; Varieties.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/341810

Comportamento de cultivares de milho em diferentes épocas de plantio no município de Altamira, PA.
Provedor de dados: 14
Autores: SOUZA, F. R. S. de; MOTA, M. G. da C.
bitstream/item/57275/1/Altamira-BP1.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cultivo; Altamira; Pará; Brasil; Maize; Cultivation; Plantation date.; Época de Plantio; Milho; Zea Mays.; Amazonia.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380517

Comportamento de dois genótipos de milho cultivados em sistema de aléias preestabelecido com diferentes leguminosas arbóreas.
Provedor de dados: 21
Autores: Leite, Andréia Araújo Lima; Junior, Altamiro Souza de Lima Ferraz; Moura, Emanoel Gomes de; Aguiar, Alana das Chagas Ferreira.
O cultivo em aléias tem sido recomendado como alternativa para a substituição da agricultura de corte e queima, no trópico úmido, devido à grande capacidade de produção de matéria orgânica e de reciclagem de nutrientes, mas algumas dúvidas quanto à sustentabilidade e à competição interespecífica são persistentes. O objetivo no trabalho foi avaliar a viabilidade da cultura do milho em um sistema de cultivo em aléias de leguminosas arbóreas. O delineamento experimental utilizado foi em blocos casualisados, com quatro repetições dos tratamentos: aléias de sombreiro (Clitoria fairchildiana), ingá (Inga edulis), guandu (Cajanus cajan) e leucena (Leucaena leucocephala) e uma testemunha sem aléias. Foram avaliadas a remobilização de carbono e nitrogênio, massa de...
Tipo: Journal paper
Palavras-chave: Farming Systems Cereals; Pulses and oilseeds.
Ano: 2008
URL: http://orgprints.org/22635/1/Leite_Comportamento.pdf

Comportamento de dois genótipos de milho sob diferentes doses e formas de nitrogênio e inoculação com Azospirillum amazonense em um ensaio de casa-de-vegetação.
Provedor de dados: 14
Autores: REIS JÚNIOR, F. B.; MACHADO, C. T. T.; MACHADO, A. T.; ROLIM, L.; SODEK, L.
bitstream/CPAC-2009/26798/1/p2005_10.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize.; Bactéria; Inoculação; Microbiologia do Solo; Milho; Zea Mays.; Azospirillum amazonense; Inoculation methods; Microbiology; Soil.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569425

Comportamento de duas variedades de milho sob diferentes níveis de fósforo e inoculação com Azospirillum amazonense em um ensaio de casa-de-vegetação.
Provedor de dados: 14
Autores: REIS JÚNIOR, F. B.; MACHADO, C. T. T.; ROLIM, L.; VILELA, A. L.; SANTOS, A. B. dos; MENDES, I. C.; MACHADO, A. T.
bitstream/CPAC-2009/26887/1/p2005_63.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize.; Bactéria; Inoculação; Milho; Microbiologia do Solo; Zea Mays.; Azospirillum amazonense; Inoculation methods; Microbiology; Soil.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569494

Comportamento de milho normal e precoce na região da Grande Dourados, MS.
Provedor de dados: 14
Autores: PACHECO, C. A. P.; MORAES, A. G. de.
bitstream/item/66156/1/CPAO-PESQ.-AND.-16-83.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Cultivar; Comportamento; Brasil; Mato Grosso do Sul; Grande Dourados; Maize; Verieties; Behaviour.; Cerrado; Milho; Zea Mays.; Brazil.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/232101

Comportamento dos Mercados Grossistas de Grão de Milho Branco Durante o Ano 2000
Provedor de dados: 31
Autores: Abdula,   Danilo Carimo.
Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambique
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Food policy; Mozambique; Food Security and Poverty; Q18.
Ano: 2001
URL: http://purl.umn.edu/56052

Comportamento fisiológico e produtivo do milho (Zea mays L.) em sistema agroflorestal.
Provedor de dados: 14
Autores: MENDES, M. M. de S.; CAVALCANTE, A. C. R.; FERNANDES, F. E. P.; LACERDA, C. F. de; OLIVEIRA, T. S. de.
Os objetivos deste trabalho foram, assim, avaliar a produtividade e o teor de macro e micronutrientes do milho, determinar a zona de absorção de água e verificar a existência de competição entre milho e uma espécie arbórea dominante em um sistema agrosilvipastoril experimental no semiárido cearense.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Variedade catingueiro; Cordia oncocalyx; Pau Branco; Sistema agrossilvipastoril; Raleamento; Rebaixamento; Sistema agroflorestal; SAFs; Produtividade da planta; Shading.; Maize; Nutrição vegetal; Nutriente; Milho; Sombreamento; Zea Mays.; Nutrients; Nutrition; Plant nutrition.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1004583

Comportamiento productivo y reproductivo de ovinos de lana locales en la región de Tlatlauquitepec, Puebla.
Provedor de dados: 32
Autores: Castro González, Numa Pompilio.
El objetivo fue determinar la ganancia diaria de peso (GDP) de corderos de lana locales (criollos) y de pelo, así como, el comportamiento reproductivo de ovejas de lana locales de la región de Tlatlauquitepec, Puebla. Dos experimentos fueron conducidos: en el primero, 40 corderos locales de lana y 40 de pelo, se sometieron a pastoreo y confinamiento. El diseño experimental fue en bloques completamente al azar con arreglo factorial 2 x 2, donde el tipo genético y la alimentación fueron los factores a probar. El factor alimentación fue determinante (P&lt;0.0001) en obtener ganancias de peso diferenciadas. La GDP fue mayor en corderos alimentados en confinamiento. El tipo genético influenció (P&lt;0.01) la GDP donde, los corderos de pelo en pastoreo tuvieron...
Palavras-chave: Ovinos criollos; Ganancia diaria de peso; Sincronización; Creole sheep; Estro; Daily liveweight gain; Synchronization; Estrus; EDAR; Maestría Tecnológica; Desarrollo y Gestión de Sistemas Ganaderos.
Ano: 2010
URL: http://hdl.handle.net/10521/327

Composição bromatológica e digestibilidade in vitro da matéria seca de silagens de milho e sorgo tratadas com inoculantes microbianos
Provedor de dados: 96
Autores: Silva,Almir Vieira; Pereira,Odilon Gomes; Garcia,Rasmo; Valadares Filho,Sebastião de Campos; Cecon,Paulo Roberto; Ferreira,Célia Lúcia de Luces Fortes.
Avaliaram-se a composição bromatológica e a digestibilidade in vitro da matéria seca (DIVMS) de silagens de milho e sorgo, tratadas ou não com inoculantes microbianos, em diferentes períodos de fermentação. Utilizou-se um arranjo fatorial 6 x 2 x 3 (períodos de fermentação x silagens x inoculantes), em delineamento inteiramente casualizado, para avaliação dos teores de matéria seca (MS) e proteína bruta (PB), e um arranjo fatorial 4 x 2 x 3 para avaliação dos constituintes fibrosos e da DIVMS, ambos com três repetições. Observou-se os efeitos da interação período de fermentação &lt;FONT FACE=Symbol&gt;´&lt;/FONT&gt; silagem &lt;FONT FACE=Symbol&gt;´&lt;/FONT&gt; inoculante sobre os teores de MS e da interação inoculante &lt;FONT...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Celulose; Fibra em detergente ácido; Fibra em detergente neutro; Hemicelulose; Matéria seca; Proteína bruta.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982005000600011

Composição química e aminogramas de cultivares de milho em melhoramento genético.
Provedor de dados: 14
Autores: MAZZARI, M. R.; SIQUEIRA, F. A. R.
bitstream/item/118240/1/composicao-quimica-e-aminogramas-milho.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Melhoramento genetico; Maize.; Composição Química; Milho.; Chemical composition; Genetic improvement.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/410565

Compost and manure effects on fertilized corn silage yield and nitrogen uptake under irrigation
Provedor de dados: 18
Autores: Lehrsch, G.A.; Kincaid, D.C.
Dairy manure increases the yields of dry bean (Phaseolus vulgaris L.) and  spring wheat (Triticum aestivum L.) from eroded, furrow-irrigated soils and may  increase corn (Zea mays L.) silage yield from steeper eroded areas under sprinkler irrigation.  In a 2-year field study in southern Idaho on Portneuf silt loam (coarse silty,  mixed, superactive, mesic Durinodic Xeric Haplocalcid), the effects of a one-time,  fall application of 29 or 72 Mg ha-1 of dry manure or 22 or 47 Mg ha21 of dry  compost on subsequent silage yield and nitrogen (N) uptake from previously eroded,  sprinkler-irrigated hill slopes were evaluated. In October 1999, stockpiled or  composted dairy manure was disked to a depth of 0.15 m into plots with slopes from  0.8 to 4.4%. After...
Tipo: Article
Palavras-chave: Corn / maize; Corn; Composted manure; Chemistry; Fertilizer; Mass Import - autoclassified (may be erroneous).
Ano: 2007
URL: http://eprints.nwisrl.ars.usda.gov/66/1/1230.pdf

Composting process from the corn residue for soil improment
Provedor de dados: 106
Autores: Siangjeaw Piriyaprin; Pitayakon Limtong; Wanlada Sununthapongsak.
1 ill., 2 tables
Palavras-chave: Corn; Maize; Corn residue; Composts; Composting process; Soil improvement; ข้าวโพด; ปุ๋ยหมัก; เศษลำต้นข้าวโพด; การปรับปรุงดิน.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4142

Concentrate reduction and sequential roughage offer to dairy cows: effects on milk protein yield, protein efficiency and milk quality
Provedor de dados: 21
Autores: Leiber, Florian; Dorn, Katharina; Probst, Johanna K.; Isensee, Anne; Ackermann, Nick; Kuhn, Anton; Spengler Neff, Anet.
An experiment was conducted during 6 weeks to evaluate effects of a reduced dietary level of protein-rich concentrates in a moderate dairy production system on cows’ performance, protein efficiency and milk quality including fatty acid profiles. Twenty-three lactating cows (Swiss Fleckvieh) were assigned either to a group receiving on average 2·4 kg/d individually fed concentrates (Prot+, n  = 12) or to a group receiving no individually fed concentrates (Prot−, n = 11). All cows had adlibitum  access to a total mixed ration (TMR) mainly based on grass and maize silage, hay and little potatoes and soybean cake. In weeks 4–6 of the experiment, part of the hay was excluded  from the TMR, and fed separately in the morning. Individual feed intake and milk yield...
Tipo: Journal paper
Palavras-chave: Feeding and growth.
Ano: 2015
URL: http://orgprints.org/29214/1/Leiber_etal_JDR_2015.pdf

Concerns of Groundwater Depletion and Irrigation Efficiency in Punjab Agriculture: A Micro-Level Study
Provedor de dados: 31
Autores: Jeevandas,   Anupama; Singh,   R.P.; Kumar,   Ranjit.
The present study, conducted during 2005-06, in two districts, viz. Amritsar and Faridkot of Punjab, (former having pre-dominantly tubewell-irrigated area and the latter having canal + tubewell irrigation facilities) has assessed the extent of water depletion and has measured irrigation efficiency at the farm level. Due to profitability and availability of water at shallow depths during 1970s, paddy and wheat (two of the high water-consuming crops) replaced other crops like maize, groundnut and pulses in the entire state. The area under these two crops increased from 7.22 per cent to 32.92 per cent for paddy and from 37.12 per cent to 43.53 per cent for wheat, from TE 1965 to TE 2005. Consequently, the problem of groundwater depletion has become severe in...
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/47672

Confirmada Baixa Produção de Cereais no Centro e Uma Melhoria no Norte do País Expectativas dos Comerciantes Rurais de Pequena Escala no Norte e Centro de Moçambique.
Provedor de dados: 31
Autores: Weber,   Michael T.
Resultados das Investigações do SIMA-DEst e Departamento de Análise de Políticas MADER-Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Crop Production/Industries; International Relations/Trade; Q18.
Ano: 2002
URL: http://purl.umn.edu/55230

Connaissance des plantes et examen des variétés de pomme de terre, de céréales et maïs, d'oléagineux, de protéagineux et de betterave à sucre
Provedor de dados: 21
L'étude variétale des espèces actuelles ou nouvelles de grandes cultures contribue à l'effort fourni par l'agriculture suisse pour satisfaire la demande en produits agricoles indigènes de qualité. Les variétés doivent répondre à de nombreux critères de productivité et de qualité propres à chaque espèce et avoir des caractéristiques agronomiques permettant de les cultiver efficacement à de faibles niveaux d'intrants compatibles avec une agriculture respectueuse de l'environnement. En application des dispositions prévues par l'ordonnance sur les semences et plants, les Stations sont chargées de l'évaluation de la valeur agronomique et technique (VAT) de nouvelles variétés proposées à l'inscription au catalogue national (CN). Cette procédure est indispensable...
Tipo: Project description
Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2023
URL: http://orgprints.org/5054/1/Pellet%2D2005%2Dgrandes%2Dcultures.pdf

Consecuencias de la agricultura de conservación en la eficiencia del uso de agua bajo condiciones de riego
Provedor de dados: 32
Autores: Kienle, Fabian.
Esta investigación se realizó en un experimento a largo plazo establecido en 1992 para  evaluar el suelo sometido a diferentes prácticas de labranza y manejos de rastrojo del  Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT), en la estación  experimental en el Centro de Investigaciones Agrícola del Noroeste (CIANO) en Ciudad  Obregón, Sonora, México, en el invierno 2008. Se evaluaron cinco diferentes sistemas  agrícolas respecto a su eficiencia en el uso de agua (EUA) en el cultivo de trigo, y un  sistema de riego por tubería con compuerta. Los cinco diferentes sistemas incluyeron  camas convencionales (CAC) con incorporación de paja y camas permanentes (CAP)  con cuatro diferentes manejos de paja (paja incorporada, paja quemada, paja...
Tipo: Tesis
Palavras-chave: Agricultura de conservación; Calidad de suelo; Vertedor de cresta triangular; Riego por surcos; Maestría; Hidrociencias; Conservation agriculture; Soil quality; V-notch weir; Furrow-irrigation.
Ano: 2008
URL: http://hdl.handle.net/10521/1261

Consequences of agro-biofuel production for greenhouse gas emissions
Provedor de dados: 21
Autores: Carter, Mette S.; Hauggaard-Nielsen, Henrik; Johansen, Anders; Ambus, Per.
Currently CO2 from fossil fuel combustion accounts for 57% of the global greenhouse gas emissions, whereas the strong greenhouse gases nitrous oxide (N2O) and methane (CH4) contribute with 8% and 14%, respectively (IPCC, 2007). Agricultural activity is the dominant source of N2O, which is mainly associated with the use of nitrogen based fertilizers in agricultural production. Replacing fossil fuel-derived energy by biomass-derived energy is commonly and with increasing emphasis proposed as a mean to mitigate the CO2 emissions. However, a recent analysis of global emission data proposes that accelerated emissions of N2O associated with the production of biomass for bio-fuel purposes will outweigh the avoided emissions of fossil fuel-derived CO2 (Crutzen et...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover Recycling; Balancing and resource management Air and water emissions Composting and manuring.
Ano: 2009
URL: http://orgprints.org/16179/1/16179.pdf

Consequences of agro-biofuel production for greenhouse gas emissions
Provedor de dados: 21
Autores: Carter, Mette S.; Johansen, Anders; Haugaard-Nielsen, Henrik; Ambus, Per.
The objective of the study was to examine the effect on N2O and CH4 emissions when residues from bio-energy production are recycling as organic fertilizer for a maize energy crop. The study showed that the N2O emission associated with the cultivation of the maize crop offset a considerable faction of the fossil CO2, which was avoided by producing the biofuels.
Tipo: Conference paper, poster, etc.
Palavras-chave: Air and water emissions.
Ano: 2008
URL: http://orgprints.org/15844/1/15844.pdf

Consequences of field N2O emissions for the environmental  sustainability of plant-based biofuels produced within an organic farming system
Provedor de dados: 21
Autores: Carter, Mette S.; Hauggaard-Nielsen, Henrik; Heiske, Stefan; Jensen, Morten; Thomsen, Sune T.; Schmidt, Jens Ejbye; Johansen, Anders; Ambus, Per.
One way of reducing the emissions of fossil fuel-derived carbon dioxide (CO2) is to replace fossil fuels with biofuels produced from agricultural biomasses or residuals. However, cultivation of soils results in emission of other greenhouse gasses (GHGs), especially nitrous oxide (N2O). Previous studies showed that field emissions of N2O may contribute significantly to total GHG emissions during biofuel production. Furthermore, N2O may counterbalance a considerable part of the global warming reduction, which is achieved by fossil fuel displacement. In the present study, we related measured field emissions of N2O to the reduction in fossil fuel-derived CO2, which was obtained when agricultural biomasses were used for biofuel production. The analysis included...
Tipo: Journal paper
Palavras-chave: Pasture and forage crops Cereals; Pulses and oilseeds Nutrient turnover Air and water emissions.
Ano: 2012
URL: http://orgprints.org/20905/10/20905.pdf

CONSEQUENCES OF THE TWO RECORD YEARS OF CEREAL INTERVENTION IN HUNGARY
Provedor de dados: 31
Autores: Rieger,   Laszlo; Szoke,   Gyula.
In this paper, problems connected to the adaptation of EU cereal intervention in Hungary are discussed. Statistical evidence is provided about the two record years of intervention in Hungary proving that farmers did not take part in intervention though the system was sought to be tailored to farmers’ needs. Intervention purchases took place at the wholesale level and traders were the most active participants in both intervention periods. This dynamic intervention activity of traders will significantly alter the Hungarian trade sector by bringing it closer to the physical processes of the cereal chain. As to the size of intervention, the great volume of the purchase of maize has resulted in an exceptionally severe problem considering the large surplus of...
Tipo: Conference Paper or Presentation
Palavras-chave: EU cereal policy; Cereal intervention; Maize intervention; Hungary; Agricultural and Food Policy.
Ano: 2007
URL: http://purl.umn.edu/8516

Conservación y aprovechamiento de poblaciones nativas de frijol común del centro-sur de México, cultivadas en asociación con maíz.
Provedor de dados: 32
Autores: Talamantes Castorena, Saulo.
México es centro de origen, domesticación y diversificación del frijol (Phaseolus vulgaris L.) y maíz (Zea mays L.). Ambas especies han sido importantes desde la época prehispánica, y la diversidad fenotípica y genética de ambos cultivos es conservada en forma de poblaciones nativas cultivadas por los agricultores en la actualidad. En la región centro-sur de México, el sistema de producción “milpa” se practica en la actualidad, con base en una gran diversidad de poblaciones nativas de frijol común de crecimiento indeterminado cultivadas en asociación con maíz en el sistema milpa. La diversidad morfológica y genética ha sido estudiada, resultando amplia variación en formas de planta, vaina y semilla. Sin embargo, el potencial de producción, la calidad...
Palavras-chave: Phaseolus vulgaris; Zea mays; Milpa; Poblaciones nativas; Fibra cruda; Ceniza; Materia seca; Firmeza de ejote; Beanraces; Raw fiber; Ash; Dry matter; Stringbean firmness; Genética; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1887

Conservation Agriculture Practices and Adoption by Smallholder Farmers in Zimbabwe
Provedor de dados: 31
Autores: Mazvimavi,   Kizito; Ndlovu,   Patrick V.; Nyathi,   Putso; Minde,   Isaac J.
This study is based on a panel survey interviewing 416 farmers practising conservation agriculture for at least five cropping seasons. Farmers obtained higher yields on conservation agriculture plots than on nonconservation agriculture ones. The mean maize yield on conservation agriculture was 1546 kg/ha compared to 970 kg/ha for non-conventional draft tillage plots across all 15 districts. However, the contribution of conservation agriculture to total household food security requirements was limited due to small plot sizes. Labor and land still remains a major challenge that limits the expansion of conservation agriculture area. Winter weeding remains a challenge, with 63% of farmers practicing it. Application of residues is still limited (56% of farmers...
Tipo: Conference Paper or Presentation
Palavras-chave: Conservation agriculture; Planting basins; Yield gains; Adoption labor; And fertilizer; Farm Management; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2010
URL: http://purl.umn.edu/96822

Conservation tillage and controlled traffic
Provedor de dados: 31
The following review is an financial assessment of an Australian Centre for International Agricultural Research (ACIAR) conservation tillage and controlled traffic research project which was conducted in China (for the conservation tillage component) and Australia (for the controlled traffic component) during the period 1993–1996, inclusive. The project—No. 9209—was implemented by staff from the Beijing Agricultural and Engineering University and the Shanxi Agricultural Machinery Bureau (in China) and the University of Queensland (in Australia).  The overall aim of the joint project was to develop and evaluate conservation and zone (controlled traffic) tillage techniques for sustainable dryland grain production in China and Australia. Australian dryland...
Tipo: Book
Palavras-chave: Conservation tillage; Controlled traffic; Conservation agriculture; China; Australia; Grain production; Dryland; Crop; Soil conservation; Crop Production/Industries; Farm Management; International Development.
Ano: 1998
URL: http://purl.umn.edu/47502

Conservation tillage in soybean and corn in the South Carolina Coastal Plain
Provedor de dados: 18
Autores: Sojka, R.E.; Busscher, W.J.
Please contact the NWISRL if you have a copy of this publication.
Tipo: Technical Bulletin
Palavras-chave: Bean / dry bean; Corn / maize; Tillage; Mass Import - autoclassified (may be erroneous).
Ano: 1989

Conservation tillage in soybean and corn in the South Carolina Coastal Plain
Provedor de dados: 18
Autores: Sojka, R.E.; Busscher, W.J.
Tipo: Conference or Workshop Item
Palavras-chave: Bean / dry bean; Corn / maize; Tillage; Mass Import - autoclassified (may be erroneous).
Ano: 1989
URL: http://eprints.nwisrl.ars.usda.gov/895/1/701.pdf

Conserving agrobiodiversity amid global change, migration, and nontraditional livelihood networks: the dynamic uses of cultural landscape knowledge
Provedor de dados: 7
Autores: Zimmerer, Karl S.; Department of Geography, Earth and Environmental Systems Institute (EESI), Penn State Institutes for Energy and the Environment (PSIEE); ksz2@psu.edu.
I examined agrobiodiversity in smallholder cultural landscapes with the goal of offering new insights into management and policy options for the resilience-based in situ conservation and social-ecological sustainability of local, food-producing crop types, i.e., landraces. I built a general, integrative approach to focus on both land use and livelihood functions of crop landraces in the context of nontraditional, migration-related livelihoods amid global change. The research involved a multimethod, case-study design focused on a cultural landscape of maize, i.e., corn, growing in the Andes of central Bolivia, which is a global hot spot for this crop&amp;#8217;s agrobiodiversity. Central questions included the following: (1) What are major agroecological...
Tipo: Peer-Reviewed Reports
Palavras-chave: Cultural landscapes; Knowledge systems; Maize; Phenology-based adaptive capacity; Social networks of migration.
Ano: 2014

Considerações técnicas sobre a cultura do milho irrigado.
Provedor de dados: 14
Autores: RESENDE, M.; FRANCA, G. E. de; ALVES, V. M. C.
bitstream/item/37460/1/doc-7.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Maize.; Irrigação; Milho; Zea Mays.; Corn; Irrigation.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/471746

Consorciacao de cultura alimentares em Ouro Preto D'Oeste-RO.
Provedor de dados: 14
Autores: LIMA, J. A. de S.; OLIVEIRA, F. N. S.; RESENDE, J. C. de.
bitstream/item/82876/1/FOL-3764-0001.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Consorciacao; Sativa oyiza; Brasil; Rondonia; Bean; Maize; Association.; Arroz; Feijão; Manihot Esculenta; Mandioca; Milho; Phaseolus Vulgaris; Zea Mays.; Brazil; Corn; Cassava; Rice.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/698601

Consórcio de culturas alimentares com mandioca.
Provedor de dados: 14
Autores: KATO, M. do S. A.; KATO, O. R.; OLIVEIRA, R. P. de.
bitstream/item/61361/1/Altamira-PA7-83.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Rodovia Transamazônica; Altamira; Pará; Brasil; Maize.; Arroz; Consorciação de Cultura; Feijão; Mandioca; Milho.; Amazonia; Cassava; Cropping systems; Kidney beans; Rice.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383425

Consórcio de milho e Brachiaria decumbens em diferentes preparos de solo - DOI: 10.4025/actasciagron.v31i4.915
Provedor de dados: 1
Autores: Cruz, Simério Carlos Silva; UNESP; Pereira, Francisco Rafael da Silva; UNESP; Bicudo, Silvio José; UNESP; Santos, José Robeto; UFAL; Albuquerque, Abel Washingthon de; UFAL; Machado, Carla Gomes; UNESP.
Preparos conservacionistas e sistemas de produção que visam à maximização sustentável do uso do solo e da água têm surgido como alternativas para regiões caracterizadas por períodos chuvosos relativamente curtos e temperaturas elevadas. O objetivo deste trabalho foi avaliar o sistema de consorciação entre milho e Brachiaria decumbens que melhor se adapte às condições edafoclimáticas da região da Zona da Mata do Estado de Alagoas. Os tratamentos consistiram de um híbrido de milho BRS3150, cultivado nos sistemas: Preparo Convencional, Cultivo Mínimo e Semeadura Direta (BRS3150 consorciado com Brachiaria decumbens). O delineamento utilizado foi o de blocos casualisados com parcelas subdivididas. Amostras de solo foram coletadas para análise química. Também...
Palavras-chave: 5.01.03.04-0    Produção de Mudas características químicas do solo; Cultivo consorciado; Produção de milho Preparos de solo chemical characteristics of soil; Intercropping system; Maize production.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/915

Consórcio de milho e feijão sob condicoes irrigadas e de sequeiro.
Provedor de dados: 14
Autores: MAGALHAES, P. C.; PEREIRA FILHO, I. A.; CRUZ, J. C.; RAMALHO, M. A. P.
bitstream/item/30651/1/Pesq.And.-10.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Consorciacao; Maize; Bean.; Feijão; Irrigação; Milho; Phaseolus Vulgaris; Zea Mays.; Irrigation.; Intercropping.
Ano: 1993
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/477085

Consórcio milho-feijão.
Provedor de dados: 14
Autores: PEREIRA FILHO, I. A.; RAMALHO, M. A. P.; CRUZ, J. C.
Avaliacao da produtividade dos sistemas consorciados; Vantagens do consorcio milho-feijao; Produtividade do milho e feijao consorciados; Epocas de plantio e sistemas de consorcio; Cultivares de milho e feijao para o consorcio; Preparo do solo; Arranjos de plantas, densidades de plantio e espacamento; Adubacao no consorcio milho-feijao; Controle de plantas daninhas; Pragas e doencas no consorcio milho-feijao.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Consorciacao; Maize; Bean.; Feijão; Milho; Phaseolus Vulgaris; Zea Mays.; Intercropping.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478845

Construção de um dispositivo para aplicação de inseticidas granulados no sulco de plantio.
Provedor de dados: 14
Autores: FINCH, E. O.; CRUZ, I.; RAMALHO, M. A. P.
bitstream/item/36062/1/ct-3.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Pragas; Controle; Aplicacao; Pest; Maize; Control; Insecticide; Equipament; Granular insecticide.; Inseticida Granulado; Milho; Zea Mays.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478751

Consulting the stakeholders on pro-poor market segmentation of maize seed in Africa
Provedor de dados: 31
Autores: De Groote,   Hugo; Andam,   Kwaw S.; Hall,   Mike; Munyua,   Bernard Gathigi; Ngigi,   Obadiah; Spielman,   David J.
Paper accepted for presentation at the 27th Conference of the International Association of Agricultural Economists (IAAE), Beijing China, August 16-22, 2009,  (Ref 690)
Tipo: Conference Paper or Presentation
Palavras-chave: Maize; Market segmentation; Seed; Agricultural and Food Policy; Crop Production/Industries; International Development.
Ano: 2009
URL: http://purl.umn.edu/51753

Consumer Perception of Sorghum Variety Attributes in the Lake Zone Tanzania
Provedor de dados: 31
Autores: Mafuru,   January M.; Norman,   David W.; Fox,   J.S.
Many sorghum varieties have been developed by research institutes in an effort to address food security problems in the semi-arid areas of Tanzania. Although sorghum is better adapted to drier areas than maize, farmer adoption rates for sorghum varieties are always lower than that of maize. In addition, maize based food is more acceptable to urban consumers than sorghum based food. In this study consumer evaluated quality attributes of sorghum ugali based on different varieties in order to determine marketing potential relating to the different improved sorghum varieties. A total of 231 consumers, randomly selected from urban and rural areas participated in a food panel to evaluate ugali prepared from five sorghum varieties (three improved, two local)....
Tipo: Conference Paper or Presentation
Palavras-chave: Adoption; Consumer perception; Conjoint analysis; Sorghum varieties; Tanzania; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/52079

Consumers’ willingness to pay for food safety: the case of mycotoxins in milk
Provedor de dados: 31
Autores: Sckokai,   Paolo; Moro,   Daniele; Cuomo,   Enrica.
European statistics show that one of the most widespread source of health risks related to food is mycotoxins. The objective of this paper is to evaluate the Italian consumers’ perception of the mycotoxins’ risk and, more specifically, their willingness-to-pay (WTP) for a hypothetical bottle of milk obtained by cows in which the feed ration contains maize certified for the ‘good practices’ that reduce such risk. For this purpose, a web-based stated choice (SC) experiment involving a representative sample of 973 Italian consumers has been carried out and WTP has been measured using the panel data version of a Random Parameters Logit (RPL) model. The results show that Italian consumers are willing to pay a rather high average price premium for...
Tipo: Conference Paper or Presentation
Palavras-chave: Food safety; Mycotoxins; Willingness to pay; Mixed logit; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; C35; D12.
Ano: 2010
URL: http://purl.umn.edu/116411

Consumers' Willingness to Pay for Genetically Modified Foods in Kenya
Provedor de dados: 31
Autores: Kimenju,   Simon Chege; De Groote,   Hugo.
A survey of 600 consumers was conducted in Nairobi to determine attitudes and willingness to pay (WTP) for GM maize meal. WTP was estimated using the double-bounded logit model. Overall, 38% are aware of GM crops. Most consumers believe in the technology's positive impacts, but are concerned about environmental and health risks. Majority (68%) would buy GM maize meal at the price of their favourite maize meal brand. The mean WTP for GM maize meal is KShs 58 for a 2kg packet, a premium of 13.7 % over mean average price of favourite brands. WTP is influenced more by subjective than socioeconomic characteristics.
Tipo: Conference Paper or Presentation
Palavras-chave: GMO; Biotechnology; Consumer; Africa; Maize; Consumer/Household Economics; D12; C25; Q16.
Ano: 2005
URL: http://purl.umn.edu/24504

Consumo hídrico e coeficiente de cultura para o híbrido DKB 390 - DOI: 10.4025/actasciagron.v31i3.379
Provedor de dados: 1
Autores: Detomini, Euro Roberto; USP; Massignan, Luiz Fernando Druzina; USP; Libardi, Paulo Leonel; USP; Dourado Neto, Durval; USP.
O objetivo deste trabalho é caracterizar o consumo hídrico do genótipo DKB 390 em condições adequadas de irrigação, tanto para situações de suprimento suficiente quanto para subótimo de nitrogênio. Valores de coeficiente de cultura são também apresentados para diferentes fases, para o primeiro caso, no intuito de prover subsídios teóricos para orçamento de água à cultura e para o manejo da irrigação durante o ciclo. Um experimento de campo foi conduzido durante a estação principal de cultivo, avaliando-se biomassa, área foliar, umidade do solo, dados climatológicos e transmitância de luz, permitindo derivar o balanço hídrico, o consumo hídrico e a eficiência de uso da água. O genótipo mencionado requer por volta de 600 mm para a obtenção de elevadas...
Palavras-chave: 5.01.00.00-9    Agronomia Zea mays; Evapotranspiração; Nitrogênio; Biomassa; KC; Milho Zea mays; Evapotranspiration; Nitrogen; Biomass; Kc; Maize.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/379

Consumo voluntário e digestibilidade "in vitro" de misturas constituídas parcialmente de subprodutos disponíveis no Estado do Pará.
Provedor de dados: 14
Autores: RODRIGUES FILHO, J. A.; CAMARAO, A. P.; GUIMARÃES, C. M. C.
bitstream/item/59304/1/CPATU-ComTec76.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Consumo voluntário; Milho em grão triturado; Torta de dendê; Tegumento de cacau; Farelo de soja; Maize; Oil cake; Soybean bran; Feed.; Alimentação; Animal; Digestibilidade In Vitro; Nutrição; Sal.; Digestibility; Nutrition.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379112

Contextual Match-making In Waste Biomaterials Management For Peri-urban Agriculture
Provedor de dados: 111
Autores: Jjagwe, Joseph.
Peri-urban agriculture is constrained by inadequate space and insufficient inputs. The objective of this paper was to estimate volumes of peri-urban agriculture waste materials generated and match it with identified users who need them in Kampala City (Uganda) as either animal feeds or manure. The mass of manure from animals and the crop residues generated were determined using the standard manure potential of animals and crop to residue (C:R) ratio methods respectively. The required baseline number of animals and crops grown in Kampala was obtained from secondary data. Of the 263,449 livestock animals in Kampala, a potential of 11,499 Mt of manure can be generated that can sustain 858 farmers each occupying 0.4 ha of land and using 13.33 Mt of manure each...
Tipo: Info:eu-repo/semantics/article
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5923

Continuously measurement of the dry matter content using near-infrared spectroscopy
Provedor de dados: 111
Autores: Mostafa, Ehab; Roesmann, Maren; Maack, Christian; Buescher, Wolfgang.
Near-infrared spectroscopy (NIRS) was used in agriculture and food chemistry in the early 1960s. NIR is located at a wavelength range between 800 nm and 2,500 nm. Although NIRS technology is a rapid, repeatable, highly precision and environmentally friendly technology for recording of spectra without destroying the samples, it is a complex method and the spectrometer calibration with a validated primary reference analysis is required. This study aimed at testing the suitability of NIRS for documenting the dry matter (DM) content of the stored silage in plastic bags. Accordingly NIRS sensors were installed in a commercial silo bagging machine after preliminary experiments in small scale were done. Maize and grass silage DM content was detected continuously...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Near-infrared spectrometer; Maize and grass silage; Dry matter content; Bagging machine.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5455

Contribution of non-exchangeable K in soils from Southern Brazil under potassium fertilization and successive cropping
Provedor de dados: 124
Autores: Steiner,Fábio; Lana,Maria do Carmo.
ABSTRACT Intense cropping of plants in pots was used to assess the contribution of non-exchangeable K to plant uptake in different soils of Paraná State, Brazil. Surface samples from nine soil types were fertilized or not with K fertilizer and subjected to six successive cropping (i.e., soybean, pearl millet, wheat, common beans, soybean and maize) under greenhouse conditions. The crops were grown in 8-L pots for 45 days, and at the end of the sixth cropping, the soil was sampled to determination non-exchangeable and exchangeable K. Shoot dry matter yield, K taken up, non-exchangeable pool contribution to K nutrition of plants were also determined. Soils differ in the ability to K supply to the plants in the short to medium term, due to the wide range of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Successive cropping of plants; Soil potassium budget; Exchangeable K; Potential buffer capacity of K.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400547

Contribution of organic amendments to soil properties and survival of Stenocarpella on maize stalk
Provedor de dados: 63
Autores: Faria,Mírian Rabelo de; Guimarães,Rafaela Araújo; Pinto,Felipe Augusto Moretti Ferreira; Siqueira,Carolina da Silva; Silva,Carlos Alberto; Medeiros,Flávio Henrique Vasconcelos de; Bettiol,Wagner.
ABSTRACT: The incorporation of organic matter to the soil not only improves nutrient content, but also reduces the survival of Stenocarpella, the causal agent of stalk rot, Diplodia ear rot, and grey leaf spot, in maize stubble. We evaluated the effect of organic waste incorporation on Stenocarpella survival in maize stalks, the activity of suppressiveness-related enzymes, and nutrient contents. We conducted the assays in the municipalities of Lavras and Sete Lagoas, Minas Gerais State, Brazil. Maize stalks infested with Stenocarpella were kept in field conditions for three months after poultry litter, swine manure, fish hydrolysate, compost sewage sludge, and urea application. Infested stalks, without residue amendment, were kept on surface or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stenocarpella maydis; Stenocarpella macrospora; Zea mays; Stalk rot; Organic matter.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000601201

CONTRIBUTIONS OF AGRICULTURAL IMPROVED TECHNOLOGIES TO RURAL POVERTY ALLEVIATION IN DEVELOPING COUNTRIES: CASE OF IMAZAPYR-RESISTANT MAIZE IN WESTERN KENYA
Provedor de dados: 31
Autores: Mignouna,   D.B.; Mutabazi,   K.D.S.; Senkondo,   E.M.; Manyong,   Victor M.
Last two decades have been dominated by issues on poverty as major growth area with the adoption by United Nations member countries of the Millennium Development Goals, the first of which calls for halving the incidence of poverty and hunger by 2015, this has underlined the importance of introduction of improved agricultural technologies. Most poor rural households in developing countries usually depend on agriculture and have to cope with poverty stills a rural phenomenon. Agricultural production has continuously decreased, subject to serious limitations such as declining soil fertility, diseases, pests, drought and erosion plaguing crops growing areas. This situation should have encouraged rural households to increasingly consider the use of promising...
Tipo: Conference Paper or Presentation
Palavras-chave: IRM technology; Striga control; Poverty reduction; Kenya.; Research and Development/Tech Change/Emerging Technologies.
Ano: 2011
URL: http://purl.umn.edu/100685

Control of aflatoxin in corn by using a mould inhibitor myco-curb
Provedor de dados: 106
Autores: Udom Pupipat; Prachum Jutawantana; Pansak Pittipornchai; Chaiwat To-anan; Chamaiporn Kittithamkul; Porntip Ucharatana.
1 table
Palavras-chave: Corn; Maize; Aflatoxins; Mould inhibitor; Myco curb; ข้าวโพด; อะฟลาทอกซิน; สารยับยั้งเชื้อรา.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4254

Control of aflatoxins in maize by Luprosil NC
Provedor de dados: 106
Autores: Chalermlarb Chuaiprasit; Chintana Chana; Somsiri Sangchote; Ronnapop Bunjoedchoedchu.
5 tables
Palavras-chave: Corn; Maize; Aflatoxins; Luprosil NC; Fungi; ข้าวโพด; อะฟลาทอกซิน; เชื้อรา.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4583

Control of Aspergillus flavus and aflatoxin contamination in high moisture maize using carbondioxide and nitrogen fumigation
Provedor de dados: 106
Autores: Werawat Nilrattanakoon; Wanpen Srithongchai; Akom Summataya; Amnat Chinchet; Amnuay Tongdee.
2 ill., 10 tables
Palavras-chave: Corn; Maize; Aspergillus flavus; Aflatoxins; Carbondioxide fumigation; Nitrogen fumigation; ข้าวโพด; อะฟลาทอกซิน; แอสเปอร์จิลลัส; ความชื้นของเมล็ด; การรมเมล็ด.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4506

Control of purple nutsedge in corn plantings
Provedor de dados: 106
Autores: Suwunnamek, U.
1 ill., 1 table
Palavras-chave: Corn; Maize; Purple nutsedge; Herbicides; Weed control; Yields; ข้าวโพด; แห้วหมู; สารกำจัดวัชพืช.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3974

Controle bem para colher melhor.
Provedor de dados: 14
Autores: SILVA, J. B. da; SILVA, A. F.
bitstream/item/55172/1/Controle-bem.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Planta daninha; Controle; Maize; Weed; Control.; Milho; Zea Mays.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476297

Controle biológico da lagarta do cartucho do milho (Spodoptera fugiperda J.E. Smith, 1797), com Baculovirus spodoptera, na região do Submédio do Vale do São Francisco.
Provedor de dados: 14
Autores: ALENCAR, J. A. de; HAJI, F. N. P.; HONDA, O. T.
bitstream/item/56377/1/PA-88-1997.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cartucho do milho; Baculovirus spodoptera; Submedio Sao Francisco; Maize.; Controle Biológico; Lagarta; Milho; Praga; Spodoptera Frugiperda.; Biological control; Pests.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131427

Controle da lagarta do cartucho com inseticida granulados aplicados mecanicamente na cultura do milho.
Provedor de dados: 14
Autores: CRUZ, I.; SANTOS, J. P.; WAQUIL, J. M.; BAHIA, F. G. T. F. C.
bitstream/item/30872/1/Pesq.And.-1.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Lagarta do cartucho; Maize; Pest; Insecticide.; Controle Químico; Inseticida; Milho; Mecanização; Praga; Spodoptera Frugiperda; Zea Mays.; Chemical control; Mechanization.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478878

Controle de fungos associados às sementes de milho por actinomicetos.
Provedor de dados: 14
Autores: BRESSAN, W.; ARAUJO, J. M. de.
bitstream/item/30148/1/Ct.33.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Controle; Actinomicetes; Maize; Seed; Treatment.; Fungo; Milho; Semente; Tratamento; Zea Mays.; Actinomycetales; Fungi.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/472300

Controle de plantas daninhas em milho e sorgo: experimentos 1978/79.
Provedor de dados: 14
Autores: SILVA, J. B. da; VIANA, A. C.
bitstream/item/47154/1/Controle-plantas-1.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Planta daninha; Controle; Maize; Weed; Control.; Milho; Sorghum Bicolor; Sorgo; Zea Mays.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478732

Controle do vetor Daubulus maidis (Hemiptera: cicadellidae) através de inseticidas neonicotinóides e seu reflexo na incidência e danos dos enfezamentos do milho em condições de campo.
Provedor de dados: 14
Autores: OLIVEIRA, C. M. de; OLIVEIRA, E. de; CRUZ, I.; LOPES, J. R. S.
bitstream/CPAC-2009/25301/1/p2004_26.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Pests of plants; Maize; Plant diseases.; Cigarrinha; Controle Químico; Enfezamento; Inseticida; Milho; Praga de Planta; Zea Mays.; Chemical control; Insecticides.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568300

Controle químico do percevejo Dichelops (Neodichelops) melacanthus (Dallas) (Heteroptera: Pentatomidae) na cultura do milho safrinha.
Provedor de dados: 14
Autores: GOMEZ, S. A.
bitstream/item/39613/1/Cot44-98.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Pests of plants; Bugs; Maize.; Controle Químico; Cerrado; Heteroptera; Milho; Percevejo; Praga de Planta; Zea Mays.; Dichelops melacanthus; Chemical control.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/242135

CONTROVERSY ABOUT AGRICULTURAL TECHNOLOGY: LESSONS FROM THE GREEN REVOLUTION
Provedor de dados: 31
Autores: Ruttan,   Vernon W.
The development and introduction of transgenically modified organisms to enhance crop and animal production has generated considerable controversy about potential food safety and environmental impacts. The introduction in tropical Latin America and Asia of high yielding varieties of wheat, maize and rice beginning in the late 1960s was also controversial. Critics argued that the new technology was biased against the poor-would make the rich richer and the poor poorer. In this paper I review the equity and productivity impacts of the "green revolution" technology and draw several inferences about evaluation the effects of the new biotechnologies in agricultural production.
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2002
URL: http://purl.umn.edu/13885

Cooperation between public and private sectors
Provedor de dados: 106
Autores: Kriangsak Suwantaradon.
Palavras-chave: Corn; Maize; Sorghum; Plant breeding; Hybrids; Seed; ข้าวโพด; เมล็ดพันธุ์ลูกผสม; แผนการปรับปรุงพันธุ์; การสนับสนุนด้านการเงิน; ความร่วมมือในทางวิชาการ.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4127

Coping with ex ante Regulations and ex post Liability Rules for Planting Bt-maize – The Portuguese Experience
Provedor de dados: 31
Autores: Skevas,   Theodoros; Fevereiro,   P.; Wesseler,   Justus.
This study investigates the attitude and practices of GM and non-GM maize farmers in Portugal. Thirty seven GM maize farmers were interviewed representing 22.5% of the total number of GM maize notifications in the country. Additionally, 66 non-GM maize farmers were surveyed in an attempt to investigate their opinion on the Bt technology, its viability and its future. The most interesting finding is that almost half of all the surveyed maize farmers (GM and non-GM) stated that the ex ante regulations are rigid and difficult to apply. On the contrary, the ex post tort liability rules are very clear and provide the appropriate security for the continuation of the GM maize cultivation.
Tipo: Conference Paper or Presentation
Palavras-chave: Coexistence; Bt-maize; Portugal; Agricultural and Food Policy; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/44189

Copper critical levels and supplying powers of Takhli, Loei and Khorat soils for corn production
Provedor de dados: 106
Autores: Chiranee Vanichkul; Amnat Suwanarit; Preeda Parkpian.
Palavras-chave: Corn; Maize; Copper level; Production; Takli Loei and Korat soil; ข้าวโพด; ทองแดง; ชุดดิน; ธาตุอาหารพืช.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4288

Copper Impacts on Corn, Soil Extractability, and the Soil Bacterial Community
Provedor de dados: 18
Autores: Ippolito, J.A.; Ducey, Tom; Tarkalson, D.D.
Sequestering carbon in soils may be one method to reduce the concentration of carbon dioxide in the atmosphere.  We measured inorganic and organic carbon, bacterial biomass and structural community diversity in southern Idaho soils having long term land use histories that supported native sagebrush vegetation (NSB), irrigated moldboard plowed crops (IMP),  irrigated conservation (chisel) tilled crops (ICT) and irrigated pasture systems (IP). Organic carbon in soil decreased in the order IP&gt;ICT&gt;NSB&gt;IMP. We use our findings to estimate the organic carbon, potentially sequestered if the use of irrigated agriculture were increased.  We also use our findings to estimate inorganic and total carbon, potentially sequestered if the use of irrigated...
Tipo: Article
Palavras-chave: Corn / maize; Amendments.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1406/1/1376.pdf

Copper, nickel and zinc phytoavailability in an oxisol amended with sewage sludge and liming
Provedor de dados: 63
Autores: Martins,Adão Luiz Castanheiro; Bataglia,Ondino Cleante; Camargo,Otávio Antonio de.
Contents of heavy metal on agricultural soils have been raised by land applications of sewage sludge and may constitute a hazard to plants, animals and humans. A field experiment was carried out from 1983 to 1987, to evaluate the long-term effect of sewage sludge application, with and without liming, on heavy metal accumulation and availability in a Rhodic Hapludox soil grown with maize (HMD 7974 hybrid). Trials were set up in a completely randomized blocks design with four replications. Each block was split in two bands, one with and another without liming. The sludge was applied in each band at rates: 0, 20, 40, 60 and 80 Mg ha-1 (dry basis) in a single application; and 40, 60 and 80 Mg ha-1 split in two, three and four equal yearly applications,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DTPA; Mehlich-3; Heavy metals; Extractability; Corn.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000400021

Cordia goeldiana Huber (freijó) em sistema "taungya" na região do Tapajós - Estado do Pará.
Provedor de dados: 14
Autores: BRIENZA JUNIOR, S.
bitstream/item/33802/1/CPATU-CirTec33.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Freijo; Sistema de plantio; Taungya; Agroflorestal; Urua; Tapajos; Pará; Brasil; Brazilian walnut; Plantation system; Maize; Mahogany.; Arroz; Andiroba; Banana; Carapa Guianensis; Cordia Alliodora; Cordia Goeldiana; Mandioca; Milho; Mogno; Swietenia Macrophylla.; Amazonia; Agroforestry; Cassava; Rice.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382252

Corn and mungbean cropping system
Provedor de dados: 106
Autores: Prakob Jan-Aram; Kemchart Chaiyarat; Wiwak Butaku; Pornsak Duangpudtan; Preecha Saengsoda; Amnuay Tongdee; Narongsak Senanarong; Panya Ekmahachai.
1 table
Palavras-chave: Corn; Maize; Mungbeans; Cropping systems; ข้าวโพด; ถั่วเขียว; ระบบการปลูกพืช.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4247

Corn and sorghum agronomic research in 1987
Provedor de dados: 106
Autores: Supot Faungfupong; Rungnapa Tangadulratana; Traisuda Waitruadrok; Wirote Cholwiriyakul; Nopasool Samuttong.
2 ill., 10 tables
Palavras-chave: Corn; Maize; Sorghum; Agronomic research; Baby corn plant density; Grain yield; Forage yield; Top cutting; Intercropping; Mungbeans; Peanuts; Legumes; Yield trial; ข้าวโพด; ข้าวฟ่าง; การเขตกรรม; ข้าวโพดฝักอ่อน; ผลผลิตเมล็ด; ผลผลิตต้นสด; ระบบการปลูกพืช; การตัดยอด; ถั่วเขียว; ถั่วลิสง; การทดสอบผลผลิต.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4245

Corn and sorghum agronomic studies in 1980
Provedor de dados: 106
Autores: Supot Faungfupong; Rachain Thiraporn; Porn Rungchang; Jarong Rungchuang.
38 tables
Palavras-chave: Corn; Maize; Sorghum; Agronomic studies; Seed maturity; Seed moisture; Plant density; Water use; Irrigation; Variety trials; Yields; ข้าวโพด; ข้าวฟ่าง; ลักษณะทางการเกษตร; การเจริญเติบโตของเมล็ด; ความหนาแน่นของพืช; การใช้น้ำ.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4028

Corn and sorghum field test
Provedor de dados: 106
Autores: Nipon Iamsupasit; Vatcharee Lertmongkol; Vichitr Benjasil.
2 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Fertilizers; Yields; ข้าวโพด; ข้าวฟ่าง; การเพาะปลูก; การทดสอบพันธุ์.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4125

Corn and sorghum insect
Provedor de dados: 106
Autores: Boonsom Meksongsee; Panya Poonyathawon; Ocha Prachuabmoh; Auranuj Kongkanjana; Malee Chawanapong; Arunee Wongkobrat; Wachara Wongkamhaeng; Thalearngsak Weerawooth.
1 ill., 5 tables
Palavras-chave: Corn; Maize; Sorghum; Pest insects; Shoot fly; Atherigona soccata; Carbofuran; Seed treatment; Insect control; Corn borers; Ostrinia furnacalis; Natural enemies; Variety trials; Yields; Losses; ข้าวโพด; ข้าวฟ่าง; แมลงศัตรูพืช; หนอนแมลงวันเจาะยอดข้าวฟ่าง; หนอนเจาะลำต้น; หนอนเจาะฝัก; หนอนใย; เพลี้ยอ่อน.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3966

Corn and sorghum insect
Provedor de dados: 106
Autores: Boonsom Meksongsee; Ocha Prachuabmoh; Auranuj Kongkanjana; Malee Chawanapong; Aurunee Wongkobrat; Wachara Wongkamhaeng; Thalearngsak Weerawooth.
4 ill., 10 tables
Palavras-chave: Corn; Maize; Sorghum; Insect pests; Stem borers; Ostrinia furnacalis; Shoot fly; Atherigona soccata; Chemical control; Trapping; Yields; Losses; ข้าวโพด; ข้าวฟ่าง; แมลงศัตรูพืช; ข้าวโพดหวาน; หนอนเจาะลำต้นข้าวโพด; หนอนแมลงวันเจาะยอดข้าวฟ่าง; กับดักปลาป่น; การควบคุมด้วยสารเคมี; ผลผลิต.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4015

Corn and sorghum insects
Provedor de dados: 106
Autores: Boonsom Meksongsee; Ocha Prachuabmoh; Auranuj Kongkanjana; Malee Chawanapong; Aurunee Wongkobrat; Wachara Wongkamhaeng; Thalearngsak Weerawooth.
2 ill., 5 tables
Palavras-chave: Corn; Maize; Sorghum; Pest insects; Shoot fly; Atherigona soccata; Stem borers; Ostrinia furnacalis; Trichogramma australicum; Economic threshold; Natural enemies; Chemical control; Insecticides; Yields; ข้าวโพด; ข้าวฟ่าง; ความคุ้มค่าทางเศรษฐศาสตร์; ไตรโคเดอร์มา; การควบคุมด้วยสารเคมี; หนอนเจาะลำต้น.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4091

Corn and sorghum insects 1976 annual report
Provedor de dados: 106
Autores: Boonsom Meksongsee; Panya Poonyathawon; Ocha Prachuabmoh; Auranuj Kongkanjana; Arunee Wongkobrat; Malee Chawanapong; Uthai Sangkasuwan; Watchara Wongkumhang; Thalearngsak Weerawooth.
2 ill., 19 tables
Palavras-chave: Corn; Maize; Sorghum; Insect pests; Thrips; Aphids; Corn borers; Webworms; Rhopalosiphum maidis; Ostrinia furnacalis; Aphis sacchari; Frankliniella williamsi; Chilo auricilius; Stenachroia elongella; Earwig; Proreus similans; Biology; Striped borer; Life cycle; Adoretus compressus; Mythimna separata; Sitophilus oryzae; Insecticides; Insect control; Pest resistance; ข้าวโพด; ข้าวฟ่าง; แมลงศัตรู; เพลี้ยไฟ; เพลี้ยอ่อน; หนอนเจาะฝัก; หนอนใย.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3878

Corn and sorghum insects 1981 annual report
Provedor de dados: 106
Autores: Boonsom Meksongsee; Ocha Prachuabmoh; Somsak Anekawieng; Auranuj Kongkanjana; Arunee Wongkobrat; Malee Chawanapong; Watchara Wongkumhang; Thalearngsak Weerawooth; Kriengkrai Jumroenma.
5 tables
Palavras-chave: Corn; Maize; Sorghum; Insect pests; Mythimna separata; Armyworms; Shoot fly; Atherigona soccata; Chemical control; Fish meal trap; Infestation; Yields; Losses; ข้าวโพด; ข้าวฟ่าง; แมลงศัตรูพืช; หนอนเจาะลำต้นข้าวโพด; หนอนเจาะฝัก; หนอนแมลงวันเจาะยอดข้าวฟ่าง; การแตกแขนง; กับดักปลาป่น; ฟูราดาน.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4052

Corn and sorghum insects 1983 annual report
Provedor de dados: 106
Autores: Meksongsee, B.; Kongkanjana, M.; Chawanapong, C.; Chunhawang, W.; Jumrernma, K.; Wongkobrat, A.
6 tables
Palavras-chave: Corn; Maize; Sorghum; Insect pests; Stem borers; Ostrinia furnacalis; Shoot fly; Atherigona soccata; Chemical control; Variety trials; Yields; Screening; ข้าวโพด; ข้าวฟ่าง; แมลงศัตรูพืช; การควบคุมด้วยสารเคมี; ไตรโคเดอร์มา; หนอนเจาะลำต้น; หนอนแมลงวันเจาะยอดข้าวฟ่าง.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4144

Corn and sorghum marketing situation
Provedor de dados: 106
Autores: Preecha Tonprasert.
Palavras-chave: Corn; Maize; Sorghum; Marketing; Exports; ข้าวโพด; ข้าวฟ่าง; การตลาด.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3848

Corn and sorghum production research in 1985
Provedor de dados: 106
Autores: Supot Faungfupong; Rachain Thiraporn; Pipat Weerathaworn; Somchai Piyapantavanon; Punnipa Phrachya; Wanich Uamsri; Porn Rungchang.
22 tables
Palavras-chave: Corn; Maize; Sorghum; Production; Legumes; Intercropping; Varietal trial; ข้าวโพด; ข้าวฟ่าง; ผลผลิต; พันธุ์; ระบบการปลูกพืช.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4593

Corn and sorghum production research in 1986
Provedor de dados: 106
Autores: Supot Faungfupong; Rachain Thiraporn; Pipat Weerathaworn; Rungnapa Tangadulratana; Traisuda Waitruadrok; Sodsai Changsaluk; Porn Rungchang.
18 tables
Palavras-chave: Corn; Maize; Sorghum; Corn production; Sorghum production; ข้าวโพด; ข้าวฟ่าง; ผลผลิต; การผลิต.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4392

Corn and sorghum regional trials in Agricultural Colleges
Provedor de dados: 106
Autores: Rachain Thiraporn.
2 ill., 2 tables
Palavras-chave: Corn; Maize; Sorghum; Varietal trials; Regional trials; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; การทดสอบพันธุ์ในหลายสภาพแวดล้อม.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3985

Corn and sorghum seed production
Provedor de dados: 106
Autores: Porn Rungchang.
Palavras-chave: Corn; Maize; Sorghum; Seed production; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; การใส่ปุ๋ย; การควบคุมแมลงศัตรูพืช; การเก็บเกี่ยวเมล็ดพันธุ์.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3994

Corn and sorghum seed production
Provedor de dados: 106
Palavras-chave: Corn; Maize; Sorghum; Seed production; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3770

Corn and sorghum seed production
Provedor de dados: 106
Autores: Porn Rungchang; Manop Subsorn; Jarong Rungchuang; Sutee Rayakaew; Surapol Chowchong.
1 table
Palavras-chave: Corn; Maize; Sorghum; Seed production; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4152

Corn and sorghum seed production
Provedor de dados: 106
Autores: Prasop Depyasuvarn; Boonguer Poosri; Somrak Noradechanon; Prakob Jan-aram; Thongchai Tangpremsri; Wantana Kittipornpaibool; Vatcharee Lertmongkol.
2 tables
Palavras-chave: Corn; Maize; Sorghum; Seed production; Varieties; ข้าวโพด; ข้าวฟ่าง; เมล็ดพันธุ์หลัก; โครงการ; การส่งเสริม; การใช้เมล็ดพันธุ์.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3992

Corn and sorghum seed production
Provedor de dados: 106
Autores: Wantana Tangpremsri; Thongchai Tangpremsri; Boonguer Poosri; Prasop Depyasuvarn; Vatcharee Lertmongkol; Vichitr Benjasil.
1 table
Palavras-chave: Corn; Maize; Sorghum; Seed production; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; เมล็ดพันธุ์หลัก; เมล็ดพันธุ์ส่งเสริม.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4116

Corn and sorghum seed production
Provedor de dados: 106
Autores: Porn Rungchang; Soonthorn Laithong; Boonlum Paysuwan; Jarong Rungchuang; Sutee Rayakaew; Juangjun Duangpatra.
8 tables
Palavras-chave: Corn; Maize; Sorghum; Seed production; Production costs; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; เมล็ดพันธุ์หลัก; ต้นทุนการผลิต.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4073

Corn and sorghum seed production
Provedor de dados: 106
Autores: Lertmongkol, V.; Chan-Aram, P.; Thepayasuwan, P.; Poosri, B.
Palavras-chave: Corn; Maize; Sorghum; Seed production; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; เมล็ดพันธุ์หลัก; เมล็ดพันธุ์ส่งเสริม.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4031

Corn and sorghum seed production (1985)
Provedor de dados: 106
Autores: Porn Rungchang; Manop Subsorn; Jarong Rungchuang; Surapol Chowchong; Somchai Lim-aroon; Sutee Rayakaew; Boonlum Paysuwan; Chirayus Laohawanich; Supranee Suttiprapha.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Seed production; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4604

Corn and sorghum seed production in Thailand
Provedor de dados: 106
Autores: Petcharat Wannapee.
Palavras-chave: Corn; Maize; Sorghum; Seed production; Thailand; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; โครงการผลิตเมล็ดพันธุ์.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3993

Corn and sorghum seed production of The Department of Agricultural Extension
Provedor de dados: 106
Autores: Tawee Pluemsab.
Palavras-chave: Corn; Maize; Sorghum; Seed production; Department of Agricultural Extension; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; เมล็ดพันธุ์หลัก; เมล็ดพันธุ์ขยาย; ศูนย์ขยายพันธุ์พืช.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4030

Corn and sorghum varietal test in farmers fields
Provedor de dados: 106
Autores: Teerasak Manupeerapan; Kitti Khajan; Chawana Boonreung; Thawanwong Promphubet; Somrak Noradechanon.
2 tables
Palavras-chave: Corn; Maize; Sorghum; On farm test; Varietal test; Farmer's fields; Varieties; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; ไร่นาเกษตรกร.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3834

Corn and sorghum variety test in dry season with irrigation
Provedor de dados: 106
Autores: Chalaw Chawanapong; Julee Tippayaruk; Atcharee Rakla; Sirichai Unsrisong; Somsri Thaiwesna; Renu Chaisorn; Pratuan Sawangsri; Sompob Orndee; Chamnan Chutkaew; Vichitr Benjasil.
2 tables
Palavras-chave: Corn; Maize; Sorghum; Variety test; Yields; Agronomic characters; Dry season; Irrigation; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; การให้น้ำชลประทาน.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3982

Corn breeding and genetics
Provedor de dados: 106
Autores: Ampol Senanarong; Chamnan Chutkaew; Nipon Iamsupasit; Narongsak Senanarong; Prakob Jan-aram; Sakol Petchmanee; Vatcharee Lertmongkol; Boonguer Poosri; Pismai Srisukphrasert.
14 tables
Palavras-chave: Corn; Maize; Progeny evaluation; Plant breeding; Genetics; Downy mildew; Disease resistance; Varieties; Yields; Quality; ข้าวโพด; การประเมินรุ่นลูก; โรคราน้ำค้าง; การปรับปรุงพันธุ์.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3861

Corn breeding and genetics
Provedor de dados: 106
Autores: Ampol Senanarong.
28 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Variety trials; Selection; Downy mildew; Disease resistance; Growth; Yields; Quality; ข้าวโพด; การปรับปรุงพันธุ์.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3825

Corn breeding in the Philippines
Provedor de dados: 106
Autores: A.C. Mercado, Jr.; Aquilizan, F.A.; Payson, R.M.; Aday, B.A.
3 tables
Palavras-chave: Corn; Maize; Corn breeding; Philippines; Plant breeding; ข้าวโพด; การปรับปรุงพันธุ์; ฟิลิปปินส์.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3729

Corn cultivation in northeast of Thailand in 1989-1990
Provedor de dados: 106
Autores: Suttinee Sojaiya; Narin Khamphimai.
2 tables
Palavras-chave: Corn; Maize; Production; Northeast region; Varieties; Technology transfer; Rainfall pattern; ข้าวโพด; การปลูก; ภาคตะวันออกเฉียงเหนือ.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4350

Corn diseases in Thailand
Provedor de dados: 106
Autores: Siripong Intrama; Winit Changsri; Udom Pupipat.
Palavras-chave: Corn; Maize; Plant diseases; Curvularia; Helminthosporium; Rhizopus; Physoderma; Aspergillus; Rusts; Diplodia; Penicillium; Gibberella; Pythium; Thailand; ข้าวโพด; โรคพืช; ประเทศไทย.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3737

Corn downy mildew program
Provedor de dados: 106
Autores: Udom Pupipat; Kitti Choonhawongse; Bunpote Tasanasuwan; Niramit Pratoomrat; Ratchanee Tangpong; Renfro, B.L.
5 tables
Palavras-chave: Corn; Maize; Downy mildew; Varieties; Disease resistance; Yields; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3872

Corn downy mildew program
Provedor de dados: 106
Autores: Renfro, B.L.; Narong Singburaudom; Singh, Jaswant; Bhat, S. Shankara.
13 tables
Palavras-chave: Corn; Maize; Downy mildew; Peronosclerospora sorghi; Varieties; Disease resistance; Infection; Plant density; Nitrogen fertilizers; Phosphate fertilizers; Water stress; Yields; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3933

Corn downy mildew project
Provedor de dados: 106
Autores: Narong Singburaudom; Wong Bunserbskul; Bonman, J.M.; Renfro, B.L.
5 tables
Palavras-chave: Corn; Maize; Downy mildew; Peronosclerospora sorghi; Infection; Epidemiology; Disease resistance; Varieties; Yields; ข้าวโพด; โรคราน้ำค้าง; การปรับปรุงพันธุ์; ความต้านทานโรค.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4018

Corn downy mildew research
Provedor de dados: 106
Autores: Tanaka, Hiroshi; Thammasak Sommartya; Udom Pupipat.
9 ill.
Palavras-chave: Corn; Maize; Downy mildew; Peronosclerospora sorghi; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4096

Corn fertilization in Chumphon devastated area
Provedor de dados: 106
Autores: Ring Meesawat; Santi Teeraporn; Pradit Boonampol; Grit Rattanaphatoom; Suthai Vuthara; Ongart Sungtharda.
2 ill., 8 tables
Palavras-chave: Corn; Maize; Fertilizer trials; ข้าวโพด; ปุ๋ย; ผลผลิต.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4504

Corn growing industry in Indonesia and its potential for Indonesian economic development
Provedor de dados: 106
Autores: Bell, F.J.
Palavras-chave: Corn; Maize; Corn production; Corn industry; Indonesian economics; Indonesia; ข้าวโพด; การผลิต; อุตสาหกรรมข้าวโพด; อินโดนีเซีย; เศรษฐกิจ.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3722

Corn improvement for drought resistance program
Provedor de dados: 106
Autores: Kitisri Sukhapinda; Somsri Thaiwesna.
2 tables
Palavras-chave: Corn; Maize; Plant breeding; Drought resistance; Variety trials; Yields; ข้าวโพด; การปรับปรุงพันธุ์; พันธุ์ทนแล้ง.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4086

Corn performance with late sowing in Planalto Catarinense, Brazil, simulated with CERES-maize model
Provedor de dados: 52
Autores: Cardoso,Célio Orli; Soccol,Olívio José.
This work had the objective to investigate the delay effects in the sowing date on corn establishment, cycle duration and yield through the computer simulations using CERES-Maize model, in order to help agrarian producers from the Mountainous Area of Santa Catarina, Brazil to take better decisions on it. The computer simulations showed that: 1)the risks on corn establishment increased due to the delay of sowing during the studied years; 2) in some years, its cycles were drastically affected for the lower temperatures; 3) the cycle durations were longer when confronted with the low temperatures; 4) corn income decreased when the cycles were confronted with the low temperatures, water deficiency and low solar radiation; 5) potential incomes averaged 4944 kg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Simulation; Mathematical Model; Sowing date.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000400002

Corn Price Behavior – Volatility transmission during the boom on futures Markets
Provedor de dados: 31
Autores: Ledebur,   Oliver von; Schmitz,   Jochen.
Since 2000 a number of factors impacted agricultural markets drastically. Among these are structural changes in global demand and repeated supply constraints that supported the observed positive development of agricultural prices. Given the increasingly interdependent global markets, the question arises of in how far an isolated view of a single market, when analysing price volatility, is sufficient? The paper is a contribution to the debate on the recent commodity price bubble and the relationship among commodity futures markets for agricultural raw materials. More particularly, the transmission of price volatility between commodity future markets is analysed. The background question is whether and to what extent the volatility of agricultural commodity...
Tipo: Conference Paper or Presentation
Palavras-chave: Commodity Futures; Corn; Time Series; Price volatility transmission; Multivariate GARCH; Agricultural and Food Policy.
Ano: 2009
URL: http://purl.umn.edu/58136

Corn production improvement of 1992-1993 crop year project
Provedor de dados: 106
Autores: Chawanwutti Chainuwat.
Palavras-chave: Corn; Maize; Production; Improvement; ข้าวโพด; การผลิต.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4514

Corn production in Vietnam
Provedor de dados: 106
Autores: Ahlgren, Vietnam.
Palavras-chave: Corn; Maize; Corn production; Vietnam; ข้าวโพด; การผลิต; เวียดนาม.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3721

Corn production research in 1989
Provedor de dados: 106
Autores: Supot Faungfupong; Juangjun Duangpatra; Surapol Chowchong; Rachain Thiraporn; Porntip Srisurapol.
6 ill., 5 tables
Palavras-chave: Corn; Maize; Plant density; Seed vigor; Sweet corn; Production; N fertilizer rate; ข้าวโพด; ข้าวโพดหวาน; ความหนาแน่น; ความแข็งแรงเมล็ด; อัตราปุ๋ยไนโตรเจน.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4332

Corn production research in 1990
Provedor de dados: 106
Autores: Supot Faungfupong; Juangjun Duangpatra; Surapol Chowchong; Rachain Thiraporn; Gunching Siriwitayawan; Kingkarm Kongjuntuk.
4 tables
Palavras-chave: Corn; Maize; Sweet corn; Yields; Production; Seeding rates; Plant population; Seed vigor; Yield component; ข้าวโพด; ข้าวโพดหวาน; การผลิต; ความหนาแน่น; ความแข็งแรงของเมล็ด; องค์ประกอบผลผลิต.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4321

Corn production under minimum tillage management I. Feasibility for Pak Chong soil
Provedor de dados: 106
Autores: Tongyai, C.; Chandraparnik, S.; Tawonmas, D.
2 ill., 4 tables
Palavras-chave: Corn; Maize; Minimum tillage; Pak Chong soil; Nitrogen fertilizers; Yields; ข้าวโพด; การลดการไถพรวน; ชุดดินปากช่อง.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4026

Corn productivity in function of surface application of lime in differents management systems and cultural preparation
Provedor de dados: 70
Autores: Narimatsu,Karem C. P.; Mello,Luiz M. M. de; Domingues,Luis A. da Silva; Chioderoli,Carlos A.; Lima,Ronaldo C.
The evaluation of technologies employed at the agricultural production system such as crop rotation and soil preparation, both associated with crop-livestock integration, is crucial. Therefore, the aim of the present study was to evaluate the incorporation of lime for three no-tillage systems and cultural managements in system of crop-livestock integration, with emphasis on corn grain yield. The experiment was conducted from January 2003 to April 2005 at Selvíria city, MS, in Dystroferric Red Latosol, clay texture. The experimental design was randomized blocks with split plots consisted of three main treatments, aimed the soil physics conditioning and the incorporation of lime: PD - No-no-tillage; CM - minimum no-tillage, and PC - conventional no-tillage;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No tillage system; Minimum tillage; Conventional tillage; Crop-livestock integration; Crop rotation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000200007

Corn regional test in 1981
Provedor de dados: 106
Autores: Chawanapong, C.; Jan-Aram, P.; Manupirapunt, T.; Petchamanee, S.; Poosri, B.; Unsrisong, S.; Sarakul, J.; Eamsupasit, N.; Noradechanon, S.; Nattripop, P.; Thaiwesana, S.; Eamsupasit, C.; Tangpremsri, T.; Imsamai, A.; Orndee, S.; Sawangsri, P.; Senanarong, N.; Benjasil, V.
13 tables
Palavras-chave: Corn; Maize; Regional test; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; การทดสอบพันธุ์ในหลายท้องที่; การทดสอบพันธุ์; ผลผลิต.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4049

Corn regional yield trial
Provedor de dados: 106
Autores: Prakob Jan-Aram; Wiwak Butaku; Sukapong Vayuparp; Preecha Saengsoda; Reantong Pansaita; Wanit Chomklin; Kritchai Jaiserb; Sujin Vabanlan; Pranom Kaewbutrdee; Sakol Petchmanee.
13 tables
Palavras-chave: Corn; Maize; Regional yield trial; Stability; Adaptability; ข้าวโพด; การทดสอบพันธุ์; ผลผลิต; ความคงตัว; การปรับตัว.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4586

Corn regional yield trials 1983
Provedor de dados: 106
Autores: Chalaw Chawanapong; Prasop Depyasuvarn; Prakob Jan-aram; Sakol Petchmanee; Boonguer Poosri; Nipon Iamsupasit; Teerasak Manupeerapan; Somsri Thaiwesna; Chalaem Romphryk; Thongchai Tangpremsri; Satit Areerak; Kritchai Jaiserb; Prawit Puddhanon; Vichitr Benjasil.
Palavras-chave: Corn; Maize; Variety trials; Regional trials; Yields; ข้าวโพด; การทดสอบพันธุ์; การทดสอบพันธุ์ในหลายท้องที่.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4148

Corn seed production with irrigation
Provedor de dados: 106
Autores: Porn Rungchang; Soonthorn Laithong; Waroon Wongruksath; Boonlum Paysuwan; Jarong Rungchuang; Sripan Wichapan.
2 ill.
Palavras-chave: Corn; Maize; Seed production; Irrigation; ข้าวโพด; การผลิตเมล็ดพันธุ์; การให้น้ำชลประทาน; การเก็บเกี่ยวเมล็ดพันธุ์; ต้นทุนการผลิต.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4032

Corn stalk integrity is improved by fungicide combinations containing carboxamide
Provedor de dados: 64
Autores: Silva,Marina Freitas e; Rezende,Wender Santos; Ferreira Júnior,Domingos da Costa; Bueno,Thays Vieira; Agostinho,Flávia Bastos; Brito,Césio Humberto de.
ABSTRACT Conservation of vegetative organs, as leaves and stalks, is essential to achieve high maize production. The objective of this work was to evaluate the effects of leaf area maintenance due to fungicides spraying on stalk integrity, its chemical composition and grain yield. The experiment was conducted in Uberlândia - MG, during the second season of 2016. The experiment design was a randomized complete block with six replications and six treatments, representing combinations of fungicides belonging to carboxamide, strobilurin, triazole, and dithiocarbamate chemical groups, and the check treatment (without fungicides). The assessed traits were leaf green area, wet and dry stalk density, stalk breaking strength and height, stalk lignin and cellulose...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Foliar area; Lignin and cellulose; Straw.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000500484

Corn standard yield trial
Provedor de dados: 106
Autores: Chalaw Chawanapong; Prakob Jan-aram; Prasop Depyasuvarn; Sakol Petchmanee; Teerasak Manupeerapan; Chanika Patamadilok; Somsri Thaiwesna; Suvit Punsurintr; Kemchart Chaiyarat; Vichitr Benjasil.
5 tables
Palavras-chave: Corn; Maize; Yield trials; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; การทดสอบพันธุ์; ผลผลิตเมล็ด; ลักษณะทางการเกษตร.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4011

Corn standard yield trial
Provedor de dados: 106
Autores: Prakob Jan-Aram; Sakol Petchmanee; Prasop Depyasuvarn; Teerasak Manupeerapan; Chalaem Matsvanna; Pradit Chomvong; Pornsak Duangpudtan; Anuroj Imsmai.
8 tables
Palavras-chave: Corn; Maize; Standard yield trial; Hybrids; Adaptability; Diseases; Insect pest; ข้าวโพด; การทดสอบพันธุ์; ลูกผสม; ผลผลิต; โรคพืช; แมลงศัตรูพืช; การปรับตัว.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4587

Corn stemborer population fluctuation on baby corn
Provedor de dados: 106
Autores: Auranuj Kongkanjana; Wachara Choonhawong.
1 table
Palavras-chave: Corn; Maize; Stem borers; Baby corn; Population fluctuation; ข้าวโพด; ข้าวโพดฝักอ่อน; หนอนเจาะลำต้น; ประชากร.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4312

Corn topping experiment
Provedor de dados: 106
Autores: Ismail, Inu G.
3 tables
Palavras-chave: Corn; Maize; Topping; Yields; Dry matter; ข้าวโพด; ผลผลิต; น้ำหนักแห้ง.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3776

Corn varietal farm trial
Provedor de dados: 106
Autores: Prakob Jan-Aram; Sakol Petchmanee; Sutep Pumiratanajarin; Rungsarit Koakang; Wiwak Butaku; Kritchai Jaiserb; Anuroj Imsmai; Sak Pengphol.
4 tables
Palavras-chave: Corn; Maize; Varietal trial; Composite variety; Hybrids; ข้าวโพด; การทดสอบพันธุ์; ผลผลิต; ลูกผสม; พันธุ์ผสมเปิด.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4588

Corn varietal regional yield test
Provedor de dados: 106
Autores: Chamnan Chutkaew; Narongsak Senanarong; Chalaw Chawanapong; Prakob Jan-aram; Prasop Depyasuvarn; Chawana Boonreung; Sumit Pookawes; Pismai Srisukphrasert; Ampol Senanarong.
1 table
Palavras-chave: Corn; Maize; Variety test; Variety trials; Regional yield test; ข้าวโพด; การทดสอบพันธุ์; การทดสอบผลผลิต.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3754

Corn variety and fertilizer field tests
Provedor de dados: 106
Autores: Lertmongkol, V.; Chan-Aram, P.; Poosri, B.; Patamadilok, C.; Chawanapong, C.; Jaichareon, D.; Benjasil, V.
1 table
Palavras-chave: Corn; Maize; Variety trials; Fertilizers; Yields; ข้าวโพด; การทดสอบพันธุ์; การทดสอบปุ๋ย.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4013

Corn yield loss caused by simulation of leaf-eating insects
Provedor de dados: 106
Autores: Watchara Choonhawong; Auranuj Kongkanjana; Boonsom Meksongsee.
3 tables
Palavras-chave: Corn; Maize; Field corn; Sweet corn; Insect pests; Leaf-eating insect; Armyworms; Patanga; Rose beetle; ข้าวโพด; ผลผลิต; แมลงกินใบ.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4567

Cornflake and its acceptability
Provedor de dados: 106
Autores: Sukoncheun Sringam; Chumsai Silavanich.
5 tables
Palavras-chave: Corn; Maize; Cornflakes; Food processing; Quality; Sensory evaluation; ข้าวโพด; คอร์นเฟลค; การวิเคราะห์คุณภาพทางประสาทสัมผัส.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4080

Corn-its importance and problems in Philippine economy
Provedor de dados: 106
Autores: Palis, R.K.
Palavras-chave: Corn; Maize; Production; Problems; Philippine economy; Philippines; ข้าวโพด; ปัญหาการผลิต; เศรษฐกิจ; ฟิลิปปินส์.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3720

Corpo estranho traqueal em cão
Provedor de dados: 45
Autores: Gouvêa,A.S; Aguiar,J; Mucillo,M; Stedile,R.; Yamazaki,P.H.; Gonzalez,P.C.; Velasque,A.G; Alievi,M.M.; Beck,C.A.C.
The occurrence of a tracheal foreign body in a three-month-old male Poodle referred to a Teaching Veterinary Hospital due to acute coughing, gagging and nausea is reported. A bronchoscopy under general anesthesia was performed in order to obtain a diagnose. During the bronchoscopy a foreign body (maize popcorn) was observed in the intrathoracic trachea. The surgeon attempted to remove it by endoscopy, but no success was achieved. Therefore, an open procedure was performed and the foreign body removed. The patient progressed satisfactorily after the thoracotomy.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dog; Thoracotomy; Bronchoscopy; Cão; Traqueotomia; Broncoscopia.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000300031

Correcao da deficiencia de zinco em lavouras de milho nos solos de cerrado.
Provedor de dados: 14
Autores: GALRAO, E. Z.
bitstream/item/121626/1/gtec-31.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Correcao do solo; Maize; Correção.; Cerrado; Deficiência; Milho; Solo; Zinco.; Zea Mays; Soil amendments; Zinc.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/555045

Correlação entre índice de cone e produtividade de milho utilizando ferramentas da agricultura de precisão.
Provedor de dados: 14
Autores: MACHADO, T. M.; SHIRATSUCHI, L. S.; SÁ, M. A. C. de; CORAZZA, E. J.
bitstream/CPAC-2009/26821/1/p2005_27.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Mapeamento; Maize; Productivity; Precision farming; Soil compactation.; Agricultura de Precisão; Compactação do Solo; Milho; Produtividade; Zea Mays.; Cartography.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569260

Correlation and path analysis of agronomic and morphological traits in maize
Provedor de dados: 124
Autores: Silva,Tallyta Nayara; Moro,Gustavo Vitti; Moro,Fabíola Vitti; Santos,Durvalina Maria Mathias dos; Buzinaro,Rodolfo.
ABSTRACT The efficiency of selection can be broadened for certain traits using estimative of genetic parameters, which are fundamental for plant breeding. The estimative of genetic parameters allows identifying the nature of the action of genes involved in the control of quantitative traits and evaluates the efficiency of different breeding strategies to obtain genetic gains. Therefore, this study aimed to verify the variability and correlation between morphological and agronomic traits in synthetic maize populations, in order to practice indirect selection. Thirteen populations were evaluated in field experiments at Jaboticabal- SP and Campo Alegre de Goiás-GO, using randomized block design, for lodging (LOD), culm breakage (CB), plant height (PH), ear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Phenotypic correlation; Genetic parameters; Direct selection.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200351

Correlation between the infestation level of Sitophilus zeamais Motschulsky, 1855 (Coleoptera, Curculionidae) and the quality factors of stored corn, Zea mays L. (Poaceae)
Provedor de dados: 92
Autores: Caneppele,Maria Aparecida Braga; Caneppele,Carlos; Lázzari,Flávio Antonio; Lázzari,Sonia Maria Noemberg.
This experiment was carried out in order to evaluate the effect of Sitophilus zeamais on physical, physiological and sanitary quality of stored corn. Samples of 500 g of the hybrid OC-705, in three replicates, were conditioned in glasses covered with a screened lid, and kept in chamber at 25±2ºC, 70±5% RH and 12 h of photophase, for 150 days. The infestation levels were 0, 5, 15 and 50 adults/replicate, for the storage periods of 30, 60, 90, 120 and 150 days. The moisture content, classification, weight loss, germination and internal infestation were evaluated monthly. Significant inverse correlations were verified between the number of insects and both the germination and the weight loss; also between the internal infestation and the germination and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize weevil; Quality factors; Stored corn; Commercial grade.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000400015

Correlations between agronomic traits and path analysis for silage production in maize hybrids
Provedor de dados: 53
Autores: Crevelari,Jocarla Ambrosim; Durães,Nayara Norrene Lacerda; Bendia,Laila Cecília Ramos; Vettorazzi,Julio Cesar Fiorio; Entringer,Geovana Cremonini; Ferreira Júnior,José Arantes; Pereira,Messias Gonzaga.
ABSTRACT The aim of the current study is to estimate the correlation coefficients and the consequence of genotypic correlations on direct and indirect effects through path analysis between agronomic traits of maize hybrids used for silage production. Eight (8) topcross hybrids and seven (7) checks were analyzed in completely randomized blocks, with six replications, in two environments: Campos do Goytacazes and Itaocara counties – Rio de Janeiro State, in the crop year 2015/2016. The following agronomic traits were assessed: plant height, first ear height, culm diameter, number of ears, ear yield with straw at silage maturity, ear yield without straw at silage maturity, grain yield at silage maturity, grains ratio in the fresh matter and fresh matter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Topcross; Tester; Multicollinearity.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000200243

Costing the Ex Situ Conservation of Genetic Resources: Maize and Wheat at CIMMYT
Provedor de dados: 31
Autores: Pardey,   Philip G.; Koo,   Bonwoo; Wright,   Brian D.; Van Dusen,   M. Eric; Skovmand,   Bent; Taba,   Suketoshi.
Worldwide, the number of genebanks and the amount of seed stored in them has increased substantially over the past few decades. Most attention is focused on the likely benefits from conservation, but conserving germplasm involves costs whose nature and magnitude are largely unknown. Because more resources spent on conserving germplasm often means less spent on characterizing the collection or using the saved seeds in crop-improvement research, knowledge of the costs of germplasm conservation has important, possibly long run, R&amp;D management, policy, and food-security consequences. Moreover, these costs place a lower bound on the benefits deemed likely to justify the expense of saving this seed. In this paper we compile and use a set of cost data for...
Tipo: Working or Discussion Paper
Palavras-chave: Germplasm conservation; Gene banks; Plant; Maize -- Breeding; Wheat -- Breeding; Rate of return; Resource /Energy Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/97509

Co-transformation of a tropical maize endophytic isolate of Fusarium verticillioides (synonym F. moniliforme) with gusA and nia genes
Provedor de dados: 74
Autores: Pamphile,João A.; Rocha,Carmen Lúcia M.S.C. da; Azevedo,João L.
A tropical endophytic isolate of the fungus Fusarium verticillioides (synonym Fusarium moniliforme) obtained from Zea mays was co-transformed with plasmid pNH24 containing the Fusarium oxysporum nitrate reductase nia gene and plasmid pNOM 102 carrying the Escherichia coli b-glucuronidase gusA gene. Transformation frequency for the nia marker was 75 transformants mg-1 vector DNA and introduction of the gusA gene by co-transformation was 57.2% as indicated by the presence of the GUS+ phenotype on plates. Southern analyses confirmed the integration of both plasmids into the genome of ten GUS+ transformants. All co-transformants showed mitotic stability in respect of the GUS+ phenotype. To assess the potential of transformed endophytic fungi as vectors for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Co-transformation; Gus; Nia; Fusarium verticillioides; Endophyte.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200021

Cotton in Zambia: An Assessment of its Organization, Performance, Current Policy Initiatives, and Challenges for the Future
Provedor de dados: 31
Autores: Tschirley,   David L.; Zulu,   Ballard; Shaffer,   James D.
This paper grows out of earlier work on cotton by the Food Security Research Project.  It is directed towards policy makers and private stakeholders in Zambia’s cotton sector, and  has  four main purposes: (a) To provide a detailed descriptive overview of the organization of the  sector and of the behavior of key public and private participants in the sector; (b) To assess  cotton’s role in smallholder livelihood strategies, and its competitiveness at the farm level  with a key alternative crop–maize; (c) To critically evaluate recent policy initiatives in the  sector and suggest key modifications that might be needed; and (d) To identify the primary  challenges that the sector faces to ensure its future competitiveness in regional and  international...
Tipo: Report
Palavras-chave: Food security; Food policy; Zambia; Cotton; Smallholder livelihood; Crop Production/Industries; Q18.
Ano: 2004
URL: http://purl.umn.edu/54467

Cotton Price Policy and New Cereal Technology in the Malian Cotton Zone
Provedor de dados: 31
Autores: Coulibaly,   Jeanne Y.; Sanders,   John H.; Preckel,   Paul V.; Baker,   Timothy G.
During the last decade, cotton production and area have been declining as a result of depleting soil nutrients and low cotton prices in the cotton zone of Mali. This paper shows that the Malian government’s 2011 policy to increase the farm gate cotton price as a response to world cotton price increase enhances farm income but has less impact on cotton than on maize production. A complementary policy of introducing new sorghum technologies would have an equal impact on farmers’ incomes in the cotton zone of Mali.
Tipo: Conference Paper or Presentation
Palavras-chave: Cotton prices; Improved sorghum technology; Discrete stochastic programming; Mali; Agricultural and Food Policy; Farm Management; International Development; Production Economics; Risk and Uncertainty.
Ano: 2011
URL: http://purl.umn.edu/103755

Country and border effects in the transmission of maize prices in Eastern Africa: evidence from a semi-parametric regression model
Provedor de dados: 31
Autores: Ihle,   Rico; von Cramon-Taubadel,   Stephan; Zorya,   Sergiy.
This study uses a rich dataset of 85 market pairs between January 2000 and October 2008 for Kenya, Tanzanian and Uganda, the three largest member countries of the East Africa Community, to analyze the factors determining national and cross-national maize price transmission. Although the three countries are members of the community’s customs union and they each claim to pursue maize trade without borders, their agricultural trade policies still differ, thus affecting prices and trade flows to different extents. This analysis extends the existing border effects literature in three ways. First, it assesses the magnitude of price transmission, instead of analyzing trade flows or price variability. Second, distance is shown to have a significant impact on price...
Tipo: Journal Article
Palavras-chave: Border effect; Spatial market integration; Cointegration; Semi-parametric regression; Partially linear model; Eastern Africa; Maize; Demand and Price Analysis; C32; Q11; Q13; Q17; Q18.
Ano: 2010
URL: http://purl.umn.edu/96184

Cover crop mulches and no-till maize
Provedor de dados: 21
Autores: Bortolussi, Stefano.
In a Northern Italian context, a field pea cover crop was tested as mulch for the maize crop. The roller crimper effectively terminated the cover crop (15 t per ha of wet biomass). However, the mulch did not last long enough, probably due to a narrow C/N-ratio and biologically active soil. The maize plants did not have enough time to develop and shade the entire soil surface. Weeds started to sprout through the decomposing mulch. For the test conditions, this cover crop has proven unsuitable as a long-lasting mulch to control weeds. No fertilization and no irrigation were applied. The maize yields amounted to about 5 t per ha.    Practical recommendations  • The cover crop needs to be sown as accurately as the main crop. Poor cover crop stands do not...
Tipo: Practice tool
Palavras-chave: Soil quality; Soil tillage; Soil; Weed management.
Ano: 2018
URL: http://orgprints.org/32610/1/PA_020_AIAB_cover_crop_no_till_maize_final.pdf

Cover Crops in the Weed Management in Soybean Culture
Provedor de dados: 87
Autores: SÃO MIGUEL,A.S.D.C.; PACHECO,L.P.; SOUZA,E.D.; SILVA,C.M.R.; CARVALHO,Í.C.
ABSTRACT: The objective of this work was to evaluate the effect of cover crops on weed suppression in no-tillage soybean production systems in Rondonopolis, Mato Grosso. The experiment was carried out in an experimental area and consisted of the evaluation of nine cover treatments and soil management in a randomized complete block design. The treatments were: NT fallow, CT fallow, Crotalaria spectabilis, Crotalaria breviflora, maize + Crotalaria spectabilis, Pennisetum glaucum, Urochloa ruziziensis, Cajanus cajan, sunflower + Urochloa ruziziensis, Stylosanthes, Vigna unguiculata, Urochloa brizantha, maize + Urochloa ruziziensis. The evaluations were carried out before the desiccation for soybean sowing in the crops (10/23/2014) and (09/21/2015), before the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; No-till system; Weed community; Suppression.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100271

Cover Crops to Secure Low Herbicide Weed Control Strategies in Maize Grown with Reduced Tillage
Provedor de dados: 21
Autores: Amossé, Camille; Büchi, Lucie; Wendling, Marina; Jeangros, Bernard; Charles, Raphael.
As a key-element of conservation agriculture, the occasional or systematic suppression of full-inversion ploughing implies an adaptation of the cropping system. To assess the ability of cover crops to control weeds in a subsequent maize crop grown with reduced tillage, three annual experiments were implemented at the research station of Agroscope  Changins,  Nyon, Switzerland. Ten non-wintering cover crop (CC) species were sown in mid-summer and compared to a bare soil treatment in strip-plot experiments including different weeding strategies according to integrated weed management rules. In case of a predictable impasse for weed control, an alternative management option was chosen 1) at the end of winter: total herbicide application instead of no...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Soil tillage Weed management.
Ano: 2018
URL: http://orgprints.org/34564/1/amosse-etal-2018-ESA2018_FinalAbstractBook_p116.pdf

Coverage mobilization in the sowing line and its influence on temperature and water content and on maize emergence
Provedor de dados: 70
Autores: BRANDELERO,EVANDRO M.; ARAÚJO,AUGUSTO G. DE; RALISCH,RICARDO.
Straw on sowing line modifies seed germination environment regarding temperature and water content. Given these considerations, the aim of this study was to evaluate different mechanisms for coverage mobilization on the sowing line and their effect on germination environment of maize seeds, mainly in relation to the dynamics of straw in the seedbed, water content and soil temperature. Treatments consisted on the combination of two mechanisms at front of furrow opener, composed of cutting disc and row cleaners, with three mechanisms behind the seed furrower for returning the soil, consisting of three covering mechanisms, commercial and prototype models. It was found that straw presence on the surface of sowing line contributed to germination of maize seeds,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No-tillage planting; Germination environment; Furrowers; Soil coverage.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000100098

Covered nitrogen levels on the evaluation of maize genotypes in late seeding
Provedor de dados: 22
Autores: Carvalho, Edmar Vinícius de; Afférri, Flávio Sérgio; Peluzio, Joênes Mucci; Leal, Tarcisio Castro Alves Barros; Souza, Clóvis Maurílio de; Naoe, Lucas Koshy.
The aim of this work was to evaluate 12-maize genotypes and the effect of four covered N levels (20; 80; 140; 200 kg ha-1), in the late seeding conditions (01/15/2014 and 02/25/2014) at Gurupi-TO. The experiments were conducted in the randomized blocks design with three repetitions and 12 treatmanets. The statistical analyze was done in each seeding, and the N effect was studied by the regression (orthogonal polynomial). It was shown significant difference among the genotypes in the greater number of evaluated traits and the grain yield of variety V8 and double-cross HD12 was classified in the superior statistical group in the two seeding dates (in average of four levels of nitrogen). These genotypes had shown the highest values of productive efficiency...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adubação; População de polinização aberta; Tocantins; Zea mays.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/15110

Covered nitrogen on study of two maize genotype groups in Gurupi, Brazil
Provedor de dados: 22
Autores: de Carvalho, Edmar Vinícius; Afférri, Flávio Sérgio; Peluzio, Joênes Mucci; Leal, Tarcísio Castro Alves de Barros; Rotili, Eliane Aparecida; Reis, Ana Luísa Lopes Ernesto.
The nitrogen is the most absorbed nutrient by maize, and its supply after seeding is common. However, its available for the plants is associate with soil and weather conditions and with kind of genetic material that is used, due the yield potential and the genetic base. This paper had the aim to evaluate two maize genotype groups at levels of nitrogen in covered, in Gurupi, Tocantins State, Brazil, season 2012/13. The experiments with 30 genotypes had two levels of covered nitrogen (0 and 150 kg ha-1) and they were seeding in two dates. The experiments with 12 genotypes had three levels of covered nitrogen (20; 80; 140 kg ha-1) and they were seeding in four dates. The experimental design was randomized blocks with three replications. For the analysis of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerrado; Populações de polinização aberta; Tocantins; Zea mays.
Ano: 2016
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13480

Crecimiento y rendimiento de frijol chino (Vigna unguiculata (L.) Walp) bajo diferentes condiciones ambientales.
Provedor de dados: 32
Autores: Apáez Barrios, Patricio.
Durante el temporal de 2009, se realizó un estudio de campo en Cocula, Gro. (clima cálido) y Montecillo, Méx. (clima templado) en una variedad de frijol chino (Vigna unguiculata (L.) Walp) de crecimiento indeterminado. Se evaluó el rendimiento de grano, biomasa total, índices de crecimiento, eficiencia en el uso del agua y rentabilidad económica en espaldera convencional (FS), espaldera de maíz (FM) y girasol (FG), con y sin biofertilizantes. Se registró la temperatura máxima y mínima, cantidad de lluvia y evaporación. La producción de vaina verde solo se evaluó en clima cálido en función del tipo de espaldera. El diseño experimental fue de bloques completos al azar con cuatro repeticiones. El ciclo del cultivo se acortó en 25 días en clima cálido (125...
Palavras-chave: Vigna unguiculata; Tipo de espaldera; Biofertilizantes; Rentabilidad económica; Trellises types; Biofertilizer; Economic analysis; Maestría; Botánica; Unidades de calor.
Ano: 2010
URL: http://hdl.handle.net/10521/217

Crecimiento y rendimiento de frijol chino (Vigna unguiculata (L.) Walp) bajo diferentes condiciones ambientales.
Provedor de dados: 32
Autores: Apáez Barrios, Patricio.
Durante el temporal de 2009, se realizó un estudio de campo en Cocula, Gro. (clima cálido) y Montecillo, Méx. (clima templado) en una variedad de frijol chino (Vigna unguiculata (L.) Walp) de crecimiento indeterminado. Se evaluó el rendimiento de grano, biomasa total, índices de crecimiento, eficiencia en el uso del agua y rentabilidad económica en espaldera convencional (FS), espaldera de maíz (FM) y girasol (FG), con y sin biofertilizantes. Se registró la temperatura máxima y mínima, cantidad de lluvia y evaporación. La producción de vaina verde solo se evaluó en clima cálido en función del tipo de espaldera. El diseño experimental fue de bloques completos al azar con cuatro repeticiones. El ciclo del cultivo se acortó en 25 días en clima cálido (125...
Palavras-chave: Vigna unguiculata; Tipo de espaldera; Biofertilizantes; Rentabilidad económica; Trellises types; Biofertilizer; Economic analysis; Maestría; Botánica; Unidades de calor.
Ano: 2010
URL: http://hdl.handle.net/10521/217

Crecimiento y rendimiento del frijol en siembra asociada y prácticas de manejo.
Provedor de dados: 32
Autores: Delgado Martínez, Rafael.
El objetivo de estudio fue determinar si la siembra asociada de frijol, así como las prácticas de manejo limita el crecimiento y rendimiento de frijol. El experimento fue conducido en Montecillo, México, bajo condiciones de temporal, durante los ciclos primavera verano del 2010 y 2011. Se evaluó el rendimiento de ejote y rendimiento de grano (RG) y componentes de frijol, así como rendimiento de grano (RG) y sus componentes en maíz, así mismo se anotaron los días a ocurrencia de las etapas fenológicas del frijol y maíz. Por otra parte, se registraron los índices ambientales y se estimó la eficiencia en el uso del agua radiación y uso de la tierra en ambas especies. Los resultados indican que los días a ocurrencia a las etapas fenológicas en frijol y maíz,...
Palavras-chave: Phaseolus vulgaris L.; Zea mays L.; Fenología; Biomasa; Phenology; Biomass; Botánica; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2181

Crescimento diferencial e eficiência de uso em zinco de cultivares de milho submetidos a doses de zinco em um Latossolo Vermelho - DOI: 10.4025/actasciagron.v29i2.256
Provedor de dados: 1
Autores: Coutinho, Edson Luiz Mendes; UNESP Jaboticabal; Silva, Eberto José da; UNESP Jaboticabal; Silva, Alysson Roberto da; UNESP Ilha Solteira.
Realizou-se este trabalho em casa de vegetaçãoo para avaliar o crescimento e eficiência em Zn de cultivares de milho de diferentes tecnologias submetidos a doses de Zn, relacionando a resposta da cultura com o teor desse micronutriente no solo e na planta. O experimento consistiu de um fatorial 4 x 3 [quatro doses de Zn (0, 1, 2 e 3 mg kg-1) e três cultivares (variedade Al-Manduri, hídrido duplo C 701 e híbrido triplo P 3041, definidos comercialmente como sendo de baixa, média e alta tecnologia, respectivamente)] em delineamento inteiramente casualizado. Os híbridos C 701 e P 3041 necessitaram de doses mais elevadas de Zn do que a variedade Al-Manduri para expressarem a produção maxima de massa seca da parte aérea, o que foi associado à exigência...
Palavras-chave: 5.07.02.02-5    Tecnologia de Produtos de Origem Vegetal Zea mays; Híbrido; Variedade; Zn disponível; Nível crítico; Fracionamento de Zn.
Ano: 2007
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/256

Critical competition period of Parthenium hysterophorus L. in spring maize (Zea mays L.)
Provedor de dados: 87
Autores: Rehman,Abdul; Qamar,Rafi; E. Safdar,Muhammad; ,Atique-ur-Rehman; M.R. Javeed,Hafiz; Maqbool,Rizwan; Farooq,Naila; Shahzad,Muhammad; Ali,Mazhar; H. Tarar,Zahid.
Abstract  Background: Parthenium hysterophorus L., commonly known as parthenium weed, poses severe economic and environmental hazards to the agro-ecosystems of Pakistan.  Objective:  To estimate the yield loss and critical competition period of this weed in the spring sown maize crop.  Method:  Field studies were conducted at an agronomic research area in the College of Agriculture at the University of Sargodha in Punjab-Pakistan during two consecutive year spring seasons (2014 and 2015). Treatments were comprised of viz., control plots (weed free), and parthenium competition durations of 2, 3, 4, 5 and 6 weeks after crop emergence (WAE), as well as weedy check for the full growing season of the crop.  Results:  Study results showed that the prolongation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competition duration; Parthenium; Spring maize; Yield loss; Logistic model.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100327

CROP BIOTECHNOLOGY FOR AFRICA: WHO WILL GAIN FROM BT MAIZE IN KENYA?
Provedor de dados: 31
Autores: Owuor,   George; Smale,   Melinda; De Groote,   Hugo.
Bt maize in Kenya is promising biotechnology innovation for poor households.  Econometric prediction from a trait-based model of variety adoption indicates that the choice of host variety has equity and efficiency implications related to heterogeneity in maize growing environments and pest pressures, as well as the differences among farm households in terms of wealth, income, and market access.
Tipo: Conference Paper or Presentation
Palavras-chave: Maize; Bt; Adoption; Area allocation; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/20379

Crop conceptual model for predicting productivity of bread wheat in semi-arid Kenya
Provedor de dados: 111
Autores: Kimurto, Paul K; Gottschalk, Klaus; Kinyua, M.G.; Ogola, J.B.O.; Towett, B. K.
 P. K. Kimurto1, K. Gottschalk2, M. G. Kinyua3, J. B. O. Ogola4, B. K. Towett 1(1. Department of Crops, Horticulture &amp; Soil Sciences, Egerton University, P.O. Box 536, Njoro, Kenya;2. Leibniz-Institut für Agrartechnik Potsdam-Bornim e.V. ATB, Max-Eyth-Allee 100, 14469 Potsdam, Germany;3. Department of Plant Breeding and Biotechnology, Moi University, P.O. Box 39000, Eldoret, Kenya;4. Department of Plant Production, University of Venda, a, Private bag X5050, South Africa) Abstract: Carrying out field trial-research in dryland areas is usually expensive and costly for most national breeding programmes; hence development of simple crop simulation models for predicting crop performance in actual semi-arid and arid lands (ASALS) would reduce the number of...
Tipo: Info:eu-repo/semantics/article
Ano: 2010
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1578

Crop conceptual model for predicting productivity of bread wheat in semi-arid Kenya
Provedor de dados: 111
Autores: Paul K Kimurto; Egerton University, Njoro; Klaus Gottschalk; Leibniz-Institut fuer Agrartechnik Potsdam-Bornim ATB; M.G. Kinyua; , Moi University, Dept of Plant Breeding and Biotechnology P.O. Box 39000, Eldoret; J.B.O. Ogola; University of Venda, Department of Plant Production, a, Private bag X5050; B. K. Towett; Egerton University, Dept. of Crops, Horticulture &amp; Soil Sciences, P.O. Box 536, Njoro.
&amp;nbsp;P. K. Kimurto1, K. Gottschalk2, M. G. Kinyua3, J. B. O. Ogola4, B. K. Towett 1(1. Department of Crops, Horticulture &amp;amp; Soil Sciences, Egerton University, P.O. Box 536, Njoro, Kenya;2. Leibniz-Institut f&amp;uuml;r Agrartechnik Potsdam-Bornim e.V. ATB, Max-Eyth-Allee 100, 14469 Potsdam, Germany;3. Department of Plant Breeding and Biotechnology, Moi University, P.O. Box 39000, Eldoret, Kenya;4. Department of Plant Production, University of Venda, a, Private bag X5050, South Africa)&amp;nbsp;Abstract: Carrying out field trial-research in dryland areas is usually expensive and costly for most national breeding programmes; hence development of simple crop simulation models for predicting crop performance in actual semi-arid and arid lands...
Ano: 2010
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1578

Crop management systems and maize grain yield under narrow row spacing
Provedor de dados: 63
Autores: Strieder,Mércio Luiz; Silva,Paulo Regis Ferreira da; Rambo,Lisandro; Sangoi,Luís; Silva,Adriano Alves da; Endrigo,Paulo César; Jandrey,Douglas Batista.
Reduction in row spacing provides a more uniform distribution among plants that can increase grain yield. The benefits of narrow row spacing can depend on the plant architecture and on the kind of crop management system. The objective of this study was to assess the effects of narrow row spacing on the grain yield of maize hybrids growing under different management systems. Six experiments were carried out in Eldorado do Sul, State of Rio Grande do Sul, Brazil, during the 2003/04 and 2004/05 growing seasons. Each experiment corresponded to a crop management system. Treatments consisted of two row spacings (0.8 and 0.4 m), two hybrids (Penta and Flash) and two plant densities, which varied with the crop management system and growing season. Besides plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Plant arrangement; Hybrid; Yield components; Fertility and irrigation levels.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400004

Crop production and soil management practices for improving yield of corn
Provedor de dados: 106
Autores: Owaht Jootanon; Supot Faungfupong; Rachain Thiraporn.
18 tables
Palavras-chave: Corn; Maize; Varieties; Plant population; Thinning; Weed control; Tassel removal; Leaf angle; Plant densities; Crop production; Soil management practices; ข้าวโพด; การผลิต; การจัดการดิน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3759

Crop production and soil management practices for improving yield of corn and sorghum
Provedor de dados: 106
3 ill., 5 tables
Palavras-chave: Corn; Maize; Sorghum; Crop production; Soil management; Cultural practices; Nitrogen fertilizers; Leaf removal; Planting date; Atrazine; Dry matter; Yields; ข้าวโพด; ข้าวฟ่าง; การผลิต; การจัดการดิน; การเพาะปลูก.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3795

Crop production and soil management practices for improving yield of corn and sorghum
Provedor de dados: 106
Autores: Supot Faungfupong; Wasana Wongyai; Surapol Chowchong.
12 tables
Palavras-chave: Corn; Maize; Sorghum; Crop production; Soil management; Fertilizers; Cultural practices; Topdressing; Leaf removal; Plant density; Intercropping; Grain yield; Yields; ข้าวโพด; ข้าวฟ่าง; การผลิตพืช; การจัดการดิน; การใส่ปุ๋ย; การเพาะปลูก.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3826

Crop productivity and soil quality after fertilization with liquid swine manure
Provedor de dados: 109
Autores: Rimoldi Tavanti,Renan Francisco; Freddi,Onã da Silva; Tavanti,Tauan Rimoldi; Lorenzon,Kayane; dos Santos,Igor de Morais; Demicheli,Matheus; Costa,Letícia Carolina; Montanari,Rafael; Breda,Carlos Cesar.
Abstract An unresolved question about the use of animal waste in agriculture is its effect on the physical and chemical attributes of soil, especially in commercial grain producing areas that have adopted direct seeding system (DSS). Aiming at contributing to the clarification of this question, we conducted a study in the mid-north region of the Mato Grosso state, Brazil, in a soybean and maize commercial area consolidated in DSS. Different doses of liquid swine manure (LSM) were applied and compared with NPK mineral fertilization. The aim of this study was to evaluate the physical and chemical quality of the soil and the productive potential of the soybean and maize crops under LSM doses and NPK fertilizer. Results indicated an increase in levels of K, P,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max L.; Zea mays L.; Fertilizers; Soil physics; Soil fertility; Direct sowing system.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200303

Crop response to organic fertilization with supplementary mineral nitrogen
Provedor de dados: 90
Autores: Ciancio,Nathalia Riveros; Ceretta,Carlos Alberto; Lourenzi,Cledimar Rogério; Ferreira,Paulo Ademar Avelar; Trentin,Gustavo; Lorensini,Felipe; Tiecher,Tadeu Luis; De Conti,Lessandro; Girotto,Eduardo; Brunetto,Gustavo.
Animal manure is applied to the soil as a nutrient source, especially of nitrogen, to plants. However, manure application rates can be reduced with the use of N fertilizer in topdressing. The aim of this study was to evaluate crop responses to different application rates of animal manure sources, used alone and supplemented with mineral N topdressing, in a no-tillage system. The study was carried out from 2005 to 2008 on a Hapludalf soil. The treatments consisted of rates of 10, 20 and 30 m³ ha-1 of pig slurry (PS), and of 1 and 2 t ha-1 of turkey manure (TM), applied alone and supplemented with topdressed N fertilizer (TNF), as well as two controls, mineral fertilization (NPK) and one control without fertilizer application. Grain yield in common bean and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal manure; Crop rotation; No-tillage cropping system.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300023

Crop sequences in no-tillage system: effects on soil fertility and soybean, maize and rice yield
Provedor de dados: 90
Autores: Marcelo,Adolfo Valente; Corá,José Eduardo; Fernandes,Carolina; Martins,Márcio dos Reis; Jorge,Ricardo Falqueto.
Decomposing crop residues in no-tillage system can alter soil chemical properties, which may consequently influence the productivity of succession crops. The objective of this study was to evaluate soil chemical properties and soybean, maize and rice yield, grown in the summer, after winter crops in a no-tillage system. The experiment was carried out in Jaboticabal, SP, Brazil (21 ° 15 ' 22 '' S; 48 ° 18 ' 58 '' W) on a Red Latosol (Oxisol), in a completely randomized block design, in strip plots with three replications. The treatments consisted of four summer crop sequences (maize monocrop, soybean monocrop, soybean/maize rotation and rice/bean/cotton rotation) combined with seven winter crops (maize, sunflower, oilseed radish, pearl millet, pigeon pea,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Winter crops; Crop rotation; Cover crops; Soil management.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000200019

CROP SUPPLY RESPONSES UNDER UNCERTAINTY IN TWO SENEGALESE REGIONS:  A COMPARATIVE STUDY
Provedor de dados: 31
Autores: Sidibe,   Mamadou.
Farm resource allocation decision, particularly in developing countries, is generally a risky process.  The uncertainty related to yields and farm product prices suggests that farmers behave in risk-averse ways.  This research uses linear programming models under a risk framework to investigate about cropping patterns and technologies most profitable to farmers in two Senegalese zones:  The Center of the Peanut Basin and the Upper Casamance.  Normative supply responses are derived for the two agricultural zones investigated under a food security perspective by making assumptions about farm price levels.  In the Central Peanut Basin, acreage under cultivation does not respond to price increases; supply responses have constant slopes.  In the Upper Casamance...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries.
Ano: 1987
URL: http://purl.umn.edu/11136

Cropping pattern management of corn to avoid losses from enveronmental calamity in central plane of Thailand
Provedor de dados: 106
Autores: Somsak Suriyo; Chutip Chanaseni; Narong Wuttiwan; Amnat Jantrakrut.
4 ill., 1 table
Palavras-chave: Corn; Maize; Rainfall; Cropping systems; Environmental calamity; Central Thailand region; ข้าวโพด; ฝน; ระบบการปลูก; พื้นที่ภาคกลาง; ความเสียหายจากภัยธรรมชาติ; การจัดการ.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4349

Cropping system : A system for minimizing aflatoxin contamination
Provedor de dados: 106
Autores: Supot Faungfupong; Pipat Weerathaworn; Komson Nakornsri.
3 tables
Palavras-chave: Corn; Maize; Aflatoxins; Cropping systems; Sorghum; Castor bean; Soybeans; Mungbeans; Peanuts; Sesame; Sunflower; ข้าวโพด; อะฟลาทอกซิน; ระบบการปลูกพืช.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4594

Cropping system of corn and cotton
Provedor de dados: 106
Autores: Prakob Jan-aram.
2 tables
Palavras-chave: Corn; Maize; Cropping systems; Cotton; Yields; Top cutting; ข้าวโพด; ฝ้าย; ระบบการปลูกพืช; ผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4340

Cropping system of corn and mungbean
Provedor de dados: 106
Autores: Prakob Jan-aram.
5 tables
Palavras-chave: Corn; Maize; Cropping systems; Mungbeans; Yields; ข้าวโพด; ถั่วเขียว; ระบบการปลูกพืช; ผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4337

Cropping system of corn and peanut
Provedor de dados: 106
Autores: Prakob Jan-aram.
1 table
Palavras-chave: Corn; Maize; Cropping systems; Peanuts; Yields; ข้าวโพด; ถั่วลิสง; ระบบการปลูกพืช; ผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4339

Cropping system of corn and soybean
Provedor de dados: 106
Autores: Prakob Jan-aram.
5 tables
Palavras-chave: Corn; Maize; Cropping systems; Soybeans; Yields; ข้าวโพด; ถั่วเหลือง; ระบบการปลูกพืช; ผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4338

Cropping systems on root rot and soybean seed yield
Provedor de dados: 65
Autores: Maier,Maira; Souza,Clovis Arruda; Casa,Ricardo Trezzi.
ABSTRACT:  Root rot (RR), which can occur in different cropping systems, affects soybean seed yield. The aim of this study was to determine the incidence of RR in soybean crop systems and its relationship with soybean yield. The study was carried out for two growing seasons in a no-till system consisting of four soybean crop systems: soybean-oat+soybean-oat, soybean-maize+soybean-maize, soybean-wheat+soybean-wheat and soybean-pasture+soybean-pasture. Data were submitted to Pearson’s correlation. Incidence of RR, mainly charcoal rot and sudden death, was more than 50% in soybean roots for all the soybean crop systems and consequently decreased yield by around 22kg ha-1 of seed for every 1% increase in RR. Root rot led to a decline in seed yield from 20 to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Root diseases; Yield; Root healty; Macrophomina; Fusarium.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000700204

Cultivador a tração animal modificado para a realização da adubação nitrogenada em cobertura e para a semeadura do feijão da seca consorciado com milho.
Provedor de dados: 14
Autores: GUIMARAES SOBRINHO, J. B.; FINCH, E. O.; RAMALHO, M. A. P.
bitstream/item/37491/1/circ-12-1.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Fertilizacao; Consorciacao; Maize; Bean; Agricultural mechanization; Fertilization; Draught animal.; Feijão; Nitrogênio; Mecanização Agrícola; Milho; Phaseolus Vulgaris; Tração Animal; Zea Mays.; Intercropping; Nitrogen.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/482837

Cultivares de milho disponiveis no mercado de sementes do Brasil no ano 2000.
Provedor de dados: 14
Autores: CRUZ, J. C.; PEREIRA FILHO, I. A.; GAMA, E. E. G. e; PEREIRA, F. T. F.; CORREA, L. A.
bitstream/item/37492/1/Doc.4.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Brasil; Maize; Seed; Market.; Mercado; Milho; Semente; Variedade; Zea Mays.; Brazil; Varieties.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484476

Cultivares de milho e população de plantas que afetam a produtividade de espigas verdes - DOI: 10.4025/actasciagron.v32i1.987
Provedor de dados: 1
Autores: Vieira, Marcelo de Andrade; UFPR; Camargo, Mariana Krusquevis; UEPG; Daros, Edelclaiton; UFPR; Zagonel, Jeferson; UEPG; Koehler, Henrique Soares; UFPR.
O produtor de milho verde busca a profissionalização de sua produção, a fim de fornecer produtos de alta qualidade e em quantidade suficiente para suprir os mercados mais exigentes. Para se alcançar esse objetivo, devem ser adotadas técnicas de manejo que proporcionem altas produtividades sem que sejam afetadas negativamente as características comerciais. Com o objetivo de avaliar a aptidão de cultivares e o efeito da população de plantas na produção de milho verde, foi conduzido um experimento em Ponta Grossa, Estado do Paraná. Adotou-se o delineamento de blocos ao acaso, em esquema de parcelas subdivididas, sendo os tratamentos principais as cultivares (Penta, 30P34, DKB 214 e SWB 551) e os secundários as populações de plantas (3,5; 5,0; 6,5; 8,0 e 9,5...
Palavras-chave: 5.01.00.00-9    Agronomia Zea mays L.; Densidade de semeadura; Genótipo; Milho verde Manejo e tratos culturais Zea mays L.; Seedling density; Genotype; Green corn.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/987

Cultivares de milho na região nordeste brasileira no ano de 1994.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; SANTOS, M. X. dos; LEAL, M. de L. da S.; CARDOSO, M. J.; MONTEIRO, A. A. T.; ANTERO NETO, J. F.; LIRA, M. A.; TAVARES FILHO, J. J.; BRANDAO FILHO, A. R. de M.; ALBUQUERQUE, M. M. de; CARVALHO, B. C. L. de; MARQUES, H. da S.
bitstream/item/69444/1/CPATC-COM.-TEC.-08-96.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cultivar; Brasil; Nordeste; Maize.; Milho; Zea Mays.; Corn.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/358084

Cultivares de milho para o Brasil.
Provedor de dados: 14
Autores: VIANNA, R. T.; GAMA, E. E. G. e; NASPOLINI FILHO, V.
bitstream/item/67499/1/Cultivares-milho.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Brasil; Maize.; Milho; Variedade; Zea Mays.; Brazil; Varieties.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476444

Cultivating multi-cultural teams:  lessons learned in the "milpa" of an Agroecology MSc course
Provedor de dados: 21
Autores: Morse, Suzanne R.; Lieblein, Geir; Breland, Tor Arvid; Francis, Charles; Nicolaysen, Anna Marie.
Traditional milpa polycultures of maize-bean-squash consistently have higher yields and are more resilient to stresses than monocultures.  This synergistic outcome builds on species differences in physiology and morphology.  In our agroecology program, the faculty work as milperos, intentionally developing multi-cultural teams that are capable of building upon their differences.
Tipo: Conference paper, poster, etc.
Palavras-chave: Systems research and participatory research Education; Extension and communication.
Ano: 2014
URL: http://orgprints.org/24014/7/24014.pdf

Cultivation Systems, Vegetable Soil Covers and their Influence on the Phytosocyology of Weeds
Provedor de dados: 87
Autores: FORTE,C.T.; GALON,L.; BEUTLER,A.N.; REICHERT JR.,F.W.; MENEGAT,A.D.; PERIN,G.F.; TIRONI,S.P.
ABSTRACT: Phytosociological studies are groups of methods that aim at the identification, composition and distribution of plant species in a community. The objective of this study was to identify and quantify the main weeds found in beans, maize and soybean cultivated in no-tillage and conventional systems. The experimental design was a randomized block one, with four replications. Experiments were conducted during three consecutive years, with summer crop (bean, maize and soybean) treatments, no-tillage system (NTS) composed by the covers, black oat, vetch and forage radish, in addition to their intercrop. In the conventional planting system (CTS), the area was left fallow in the off-season. The shoot dry matter of the covers was evaluated in each crop....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytosociological parameters; Crop systems; Euphorbia heterophylla; Vicia sativa; Avena strigosa; Raphanus sativus.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100292

Cultivo de milho em várzea do Amazonas: variedades BR-5102 e saracura.
Provedor de dados: 14
Autores: BARRETO, J. F.; DIAS, M. C.; XAVIER, J. J. B. N.; MARTINS, G. C.; FIGUEIREDO, E. A.
Visando disponibilizar variedades melhoradas e adaptadas as condicoes ambientais do Amazonas, a Embrapa Amazonia Ocidental em conjunto com a Embrapa Milho e Sorgo, apos varias etapas de selecao, com enfase maior para as varzeas, em solos classificados como gley pouco humido e caracterizados como de alta fertilidade natural e, tambem de maior concentracao de produtores da cultura. Estas variedades selecionadas e adaptadas as condicoes de varzea, se bem exploradas, contribuirao substancialmente para o aumento da producao de milho no Estado.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cultivo; Brasil; Amazonas; Humaita; Maize.; Milho; Variedade; Zea Mays.; Crop management; Varieties.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/670183

Cultivo de milho no sistema de aléias com leguminosas perenes.
Provedor de dados: 21
Autores: Queiroz, Luciano Rodrigues; Coelho, Fábio Cunha; Barroso, Deborah Guerra.
Objetivou-se avaliar a influência de algumas leguminosas perenes no teor foliar de N, P e K e na produtividade da cultura do milho (UENF 506-8), cultivado no sistema de aléias, sem adubação fosfatada. Foram realizados experimentos de campo por dois ciclos de cultivo, no Campo Experimental do CCTA/UENF, em Campos dos Goytacazes RJ. Os tratamentos consistiram no sistema de aléias com Albizia lebbeck (L.) Benth., Peltophorum dubium (Spreng.) Taub., Leucaena leucocephala (Lam.) de Wit.,Cajanus cajan (L.) Millsp., Sesbania virgata (Cav.) Pers., Mimosa caesalpiniaefolia Benth., Gliricidia sepium (Jacq.) Pers. e duas testemunhas com milho solteiro (com e sem NPK). Após oito meses de plantio das leguminosas, essas foram podadas, o material foi incorporado ao solo...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds.
Ano: 2007
URL: http://orgprints.org/20311/1/Queiroz_cultivo.pdf

Cultivo do milho adensado: alternativa para maximizar o rendimento de grãos.
Provedor de dados: 14
Autores: MARCHÃO, R. L.; BRASIL, E. M.
ABSTRACT: The increment on plant density in narrow row spacing resulted in a greater absorption of photosynthetic active radiation particularly in tropical environments as in the Cerrado Biome. This review aims to analyze the main factors that affect plant arrangement definition in maize, the changes in plant arrangement recommendation and, the modification in plant traits that favored such changes. The choice of plant arrangement in the field must take into account cultivar, grower objective, input availability, planting date and disponible farmer structure. The association between better crop management and highly productive hybrids favored the increase in plant density and reduction in row spacing. Most of research results showed that grain yield was...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Maize.; Densidade de Plantio; Espaçamento; Milho; Semeadura; Zea Mays.; Plant density; Row spacing.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570882

Cultivo do milho irrigado.
Provedor de dados: 14
Autores: RESENDE, M.; FRANCA, G. E. de; COUTO, L.
bitstream/item/37493/1/circ-6.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize; Management; Grain.; Grão; Manejo; Irrigação; Milho; Sistema de Produção; Zea Mays.; Irrigation.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/485064

Cultivo intercalar de milho seguido de caupi num plantio de dendê.
Provedor de dados: 14
Autores: WERNIGERODE, A. G. zu S.; ANDRADE, E. B. de.
bitstream/item/40157/1/Circ-Tec-47-CPATU.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Caupi; Consorciacao; Cultivo; Desenvolvimento; Campo Experimental de Capitao Poco; Pará; Brasil; Maize; Cowpea; Oil palm; Consorciation; Cultivation; Yield; Development.; Dendê; Elaeis Guineensis; Milho; Produtividade; Zea Mays.; Vigna Unguiculata; Amazonia.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383381

Cultivos de arroz, milho e caupi adubados com biofertilizante e superfosfato triplo.
Provedor de dados: 14
Autores: OLIVEIRA, R. F. de; CRUZ, E. de S.; ALVES, S. de M.; COSTA, M. P. da; FERREIRA, W. de A.
bitstream/item/42515/1/Boletim-Pesquisa-160-cpatu.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Caupi; Adubação fosfatada; Adubação orgânica; Capitão Poço; Pará; Brasil; Maize; Cowpea; Phosphate fertilizer; Organic fertilizer.; Arroz; Milho; Solo.; Amazonia; Rice; Soil.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374325

Cultivos sucessivos de milho em várzea.
Provedor de dados: 14
Autores: LOPES FILHO, R. P.
Visando obter informações sobre formas de cultivares de milho em várzeas, capazes de manter em uma mesma área elevadas produtividades por um período maior que o verificado atualmente, estao sendo avaliados cultivos sucessivos dessa espécie, através de ações de pesquisa executadas em várzea úmida as margens do rio Mazagão, município de Mazagão, AP.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Amapá; Maize.; Cultivo Continuo; Milho; Zea Mays.; Várzea; Continuous cropping.; Brazil.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/341848

Cultural practice of corn and sorghum, 1976
Provedor de dados: 106
Autores: Ampol Senanarong; Narongsak Senanarong; Jansamoot Sarakul; Sirichai Unsrisong; Somrak Noradechanon; Prakob Jan-aram; Permphul Chomjinda; Teerasak Manupeerapan; Chawana Boonreung.
10 tables
Palavras-chave: Corn; Maize; Sorghum; Cultural practices; Varieties; Downy mildew; Disease resistance; Green manures; Methods of planting; Intercropping; Seeding rates; Yields; ข้าวโพด; ข้าวฟ่าง; การเพาะปลูก.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3854

Cultural practice studies in corn and sorghum during 1976
Provedor de dados: 106
Autores: Supot Faungfupong; Wasana Wongyai; Kittima Montranon; Surapol Chowchong.
17 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Direction of planting; Nitrogen fertilizers; Nitrate reductase; Plant population; Tannin; Yields; ข้าวโพด; ข้าวฟ่าง; ประชากรพืช; แทนนิน; ปริมาณ; เอนไซม์; ไนเตรตรีดัคเตส; ทิศทางการปลูก; การเพาะปลูก.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3853

Cumulative effects of cropping systems involving corn and legumes on the yields of the component crops
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sukum Chotechuangmanirat.
2 tables
Palavras-chave: Corn; Maize; Soybeans; Mungbeans; Peanuts; Cropping systems; Fertilizers; Yields; ข้าวโพด; ถั่วเหลือง; ถั่วเขียว; ถั่วลิสง; ระบบการปลูกพืช; ยูเรีย; ดินสีน้ำตาลแดง.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4104

Cumulative effects of cropping systems involving corn and legumes on the yields of the eight year crops
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sukum Chotechuangmanirat.
2 tables
Palavras-chave: Corn; Maize; Legumes; Soybeans; Mungbeans; Peanuts; Cropping systems; Fertilizers; Yields; ข้าวโพด; พืชตระกูลถั่ว; ระบบการปลูกพืช; ถั่วเหลือง; ถั่วเขียว; ถั่วลิสง; การใส่ปุ๋ย; การปลูกพืชหมุนเวียน; ระบบการปลูกพืชแบบสลับ.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4141

Cumulative effects of cropping systems involving corn and legumes on the yields of the fifteenth-year crops
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Manirat Dechlan.
2 tables
Palavras-chave: Corn; Maize; Cropping systems; Legumes; Yields; Cumulative effect; ข้าวโพด; ระบบการปลูกพืช; พืชตระกูลถั่ว; ผลผลิต.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4287

Cumulative effects of cropping systems involving corn and legumes on the yields of the fourteenth-year crops
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sodsai Changsaluk; Jitima Yathapootanont.
3 tables
Palavras-chave: Corn; Maize; Cropping systems; Legumes; Yields; Cumulative effect; ข้าวโพด; ระบบการปลูกพืช; พืชตระกูลถั่ว; ผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4355

Cumulative effects of cropping systems involving corn and legumes on the yields of the ninth-year crops
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sukum Chotechuangmanirat.
3 tables
Palavras-chave: Corn; Maize; Cropping systems; Legumes; Yields; Cumulative effect; ข้าวโพด; ระบบการปลูกพืช; พืชตระกูลถั่ว.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4597

Cumulative effects of cropping systems involving corn and legumes on the yields of the tenth-year crops
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Jettada Makhasuwanarojn.
3 ill.
Palavras-chave: Corn; Maize; Cropping systems; Legumes; Yields; Cumulative effect; ข้าวโพด; ระบบการปลูกพืช; ผลผลิต; พืชตระกูลถั่ว.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4599

Cumulative effects of cropping systems involving corn and legumes on the yields of the twelvth-year crops
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sodsai Changsaluk.
3 tables
Palavras-chave: Corn; Maize; Legumes; Soybeans; Peanuts; Cropping systems; Corn-legume rotation; Soil productivity; Fertilizers; ข้าวโพด; ถั่ว; ระบบการปลูกพืช; ปุ๋ย; ผลผลิต.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4250

Cumulative effects of urea and ammonium sulfate on corn grown in second year on reddish brown lateritic soil
Provedor de dados: 106
Autores: Amnat Suwanarit; Sodsai Changsaluk.
2 ill.
Palavras-chave: Corn; Maize; Growth; Urea; Ammonium sulphate; Reddish brown lateritic soil; ข้าวโพด; การเจริญเติบโต; ปุ๋ยยูเรีย; อะลูมิเนียมซัลเฟต; ดินชุดปากช่องสีแดง.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4249

Cumulative effects of urea and ammonium sulfate on the fifth-year corn grown on reddish brown lateritic soil
Provedor de dados: 106
Autores: Amnat Suwanarit; Manirat Dechlan.
1 table
Palavras-chave: Corn maize yields urea ammonium sulfate reddish brown lateritic soil; Cumulative effect ข้าวโพด การเจริญเติบโต ปุ๋ยยูเรีย แอมโมเนียมซัลเฟต ดินสีแดงชุดปากช่อง.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4286

Cumulative effects of urea and ammonium sulfate on the fourth-year corn grown on reddish brown lateritic soil
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sodsai Changsaluk.
1 table
Palavras-chave: Corn; Maize; Yields; Urea; Ammonium sulfate; Reddish brown lateritic soil; Cumulative effect; ข้าวโพด; การเจริญเติบโต; ปุ๋ยยูเรีย; แอมโมเนียมซัลเฟต; ดินสีแดงชุดปากช่อง.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4353

Custo de produção de milho em sistemas de cultivo manual e mecanizado, no município de Alenquer, Pará.
Provedor de dados: 14
Autores: SOUZA, F. R. S. de; CARVALHO, R. de A.; FERREIRA, C. A. P.; CORREA, J. R. V.
bitstream/item/40146/1/Cic-Tec-77-CPATU.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Sistema de cultivo mecanizado; Sistema de cultivo manual; Aspecto econômico; Alenquer; Pará; Brasil; Maize; Mechanical methods; Economic situation.; Custo de Produção; Milho.; Amazonia; Cropping systems; Production costs.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376660

Custo de produção de milho, safra 1994/95.
Provedor de dados: 14
Autores: MELO FILHO, G. A. de; RICHETTI, A.; KRUKER, J. M.
bitstream/item/66556/1/N-6-set.94.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize.; Custo de Produção; Cerrado; Milho; Zea Mays.; Production costs.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/240769

Custos de recuperação de pastagem degradada utilizando milho como cultura associada.
Provedor de dados: 14
Autores: DUARTE, J. de O.; ALVARENGA, R. C.
bitstream/item/30680/1/Pesq.And.-15.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Maize; Cost.; Custo; Milho; Pastagem; Zea Mays.; Pastures.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478854

Daily and seasonal patterns of CO2 fluxes and evapotranspiration in maize-grass intercropping
Provedor de dados: 91
Autores: Machado,Cássia B.; Lima,José R. de S.; Antonino,Antonio C. D.; Souza,Eduardo S. de; Souza,Rodolfo M. S.; Alves,Edevaldo M.
ABSTRACT Studies that investigate the relationships between CO2 fluxes and evapotranspiration (ET) are important for predicting how agricultural ecosystems will respond to climate changes. However, none was made on the maize-grass intercropping system in Brazil. The aim of this study was to determine the ET and CO2 fluxes in a signal grass pasture intercropped with maize, in São João, Pernambuco, Brazil, in a drought year. Furthermore, the soil water storage (SWS) and leaf area index (LAI) were determined. The latent heat flux was the main consumer of the available energy and the daily and seasonal ET and CO2 variations were mainly controlled by rainfall, through the changes in soil water content and consequently in SWS. The agroecosystem acted as an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eddy covariance; Carbon; Climate change.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000900777

Data Collection Tools And Good Practices In Ghana
Provedor de dados: 20
Autores: Oku, S.
Ghana with population of 18.4 million (2000), is located on Latitude 4,44’N 11,11’N and longitude 3,11’W, 1,11’E. The country has a total land area of 23,853,900 HA and agricultural land area of 13,628,179 HA. The agricultural sector is the dominant sector in the Ghanaian economy. The total area under cultivation and irrigation are 5,808,600HA and 11,000 HA respectively. Agriculture is predominantly on a small holder basis although there are few large farms and plantations particular for oil palm, coconut, rubber and to a lesser extent rice, maize, and pineapple. Main crops cultivated are the cereals; maize, rice, millet, sorghum and the starchy crops of cassava, yam, cocoyam and plantain. Fruits and vegetables are increasingly being produced and exported...
Tipo: Conference Material
Palavras-chave: Food aid; Food resources; Agriculture; Livestock; Http://aims.fao.org/aos/agrovoc/c_3026; Http://aims.fao.org/aos/agrovoc/c_203; Http://aims.fao.org/aos/agrovoc/c_4397.
Ano: 2001
URL: http://hdl.handle.net/1834/692

DEBUNKING THE MYTHS OF GM CROPS FOR AFRICA: THE CASE OF BT MAIZE IN KENYA
Provedor de dados: 31
Autores: Odhiambo,   Benjamin; Bergvinson,   David; Mugo,   Stephen; De Groote,   Hugo.
Empirical evidence from research on Bt maize in Kenya puts to rest most concerns raised against GMOs (not responding to farmers' needs, expensive, benefiting agro-business, risk of decreased biodiversity), but does indicate that contamination of local varieties is likely and buildup of insect resistance possible, requiring careful monitoring and evaluation.
Tipo: Conference Paper or Presentation
Palavras-chave: GMO; Maize; Kenya; Risk; Environment; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/19918

Décimo ciclo de seleção entre e dentro de famílias de meios-irmãos na variedade de milho BR 5011 - Sertanejo.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; SANTOS, M. X. dos; CARVALHO, P. C. L. de; LEAL, M. de L. da S.
bitstream/item/87827/1/CPATC-PESQ.-AND.-15-96.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Melhoramento genético; Maize; Genetics miprovement; Selection.; Milho; Seleção.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/358689

Decomposição de resíduos vegetais em latossolo sob cultivo de milho e plantas de cobertura (2007).
Provedor de dados: 14
Autores: CARVALHO, A. M.; BUSTAMANTE, M. M. C.; SOUSA JUNIOR, J. G. A.; VIVALDI, L. J.
bitstream/item/78935/1/p2007-15.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Resíduo vegetal; Maize; Green manure.; Solo.; Plant nutrition.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/571021

Degradabilidade in situ da matéria seca e da proteína bruta do  farelo de arroz, farelo de trigo, grão de milho e grão de aveia - DOI: 10.4025/actascianimsci.v29i2.224
Provedor de dados: 2
Autores: Mizubuti, Ivone Yurika; UEL; Moreira, Fernanda Barros; UEL; Ribeiro, Edson Luis de Azambuja; UEL; Pereira, Elzânia Sales; UFC; Rocha, Marco Antônio da; UEL; Silva Filho, Mauro de Freitas; UEL.
O objetivo deste trabalho foi determinar a degradabilidade ruminal da matéria  seca (MS) e da proteína bruta (PB) do milho em grão (MG), aveia em grão (AG), farelo de  trigo (FT) e farelo de arroz (FA). Foi utilizada a técnica ,in situ, com sacos de náilon, sendo  avaliados os tempos 0, 3, 6 12, 18, 24, 48 e 72 horas de permanência no rúmen, utilizandose  quatro bovinos adultos, em um delineamento em quadrado latino 4 x 4. A matéria seca da  AG apresentou maior fração solúvel (36,58%), maior taxa de degradação (12,95% h-1) e  maior degradabilidade efetiva (DE) (79,28%). O FA apresentou menor fração  potencialmente degradável (b) (29,24%) e menor DE da MS (49,16%). O MG apresentou  maior fração solúvel da PB (56,88%). A AG apresentou maior taxa de...
Palavras-chave: 5.04.00.00-2    Zootecnia bovinos; Concentrado; Desaparecimento ruminal; Rúmen; Taxa de degradação 5.04.00.00-2    Zootecnia.
Ano: 2007
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/224

Delivering the Goods: Scaling out Results of Natural Resource Management Research
Provedor de dados: 7
Autores: Harrington, Larry; International Maize and Wheat Improvement Center (CIMMYT); l.harrington@cgiar.org; White, Jeffrey; ; j.white@cgiar.org; Grace, Peter; Sinclair Knight Merz, Brisbane, Australia; pgrace@skm.com.au; Hodson, David; ; d.hodson@cgiar.org; Hartkamp, Agnes Dewi; Product Organisation Grains, Seeds and Pulses, The Hague, Netherlands; d.hartkamp@wisint.org; Vaughan, Christopher; CO MET Directorate of Environmental Affairs, Namibia; kit@africaonline.com.na; Meisner, Craig; ; cmeisner@bttb.net.bd.
To help integrated natural resource management (INRM) research "deliver the goods" for many of the world's poor over a large area and in a timely manner, the authors suggest a problem-solving approach that facilitates the scaling out of relevant agricultural practices. They propose seven ways to foster scaling out: (1) develop more attractive practices and technologies through participatory research (2) balance supply-driven approaches with resource user demands, (3) use feedback to redefine the research agenda, (4) encourage support groups and networks for information sharing, (5) facilitate negotiation among stakeholders, (6) inform policy change and institutional development, and (7) make sensible use of information management tools, including models...
Tipo: Peer-Reviewed Reports
Palavras-chave: Mexico; South Asia; Southern Africa; Conservation tillage; Diffusion of research; Environments; Geographic information systems; Natural resource management; Participatory research; Scaling out; Simulation models; Technology transfer.
Ano: 2001

Demand and Supply of Crop Infraspecific Diversity on Farms: Towards a Policy Framework for On-Farm Conservation
Provedor de dados: 31
Autores: Bellon,   Mauricio R.
Interest is increasing worldwide in on-farm conservation as a component of a strategy to conserve crop genetic resources. On-farm conservation may require outside support to small-scale farmers in areas of crop domestication and diversity. This paper argues that crop infraspecific diversity maintained by farming households in these areas results from the interplay between demand and supply for this diversity (i.e., its loss may be demand- or supply-related). In the first instance, interventions should be aimed at increasing the value of crop diversity for farmers or decreasing the farm-level opportunity costs of maintaining diversity. In the second instance, interventions should decrease the transaction costs of accessing crop diversity. It may be...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/7666

Demand for Drought Tolerance in Africa: Selection of Drought Tolerant Maize Seed using Framed Field Experiments
Provedor de dados: 31
Autores: Dalton,   Timothy J.; Yesuf,   Mahmud; Muhammad,   Lutta.
Recent projections on the impact of climate change argue that eastern and southern Africa will be two regions around the globe that will experience dramatic reductions in maize yields by mid‐century. Absent from these projections is any consideration for farmer adaptation of cropping practices or land reallocation. This research quantifies risk, loss and ambiguity aversion for a sample of smallholder Kenyan farmers using framed field experiments. This behavioral information, directly elicited, is used to condition the selection of maize varieties differentiated by drought tolerance, pest resistance, maturity, and seed price. Overall, the willingness to pay for drought tolerance and other attributes is highly heterogeneous as determined through a Latent...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2011
URL: http://purl.umn.edu/103712

Demand for Maize Hybrids, Seed Subsidies, and Seed Decisionmakers in Zambia.
Provedor de dados: 31
Autores: Smale,   Melinda; Mason,   Nicole M.
The successful development and diffusion of improved maize seed in Zambia during the 1970s–80s was a major achievement of African agriculture but was predicated on a government commitment to parastatal grain and seed marketing, the provision of services to maize growers, and a pan-territorial pricing scheme that was fiscally unsustainable. Declining maize output when this system was dismantled contributed to the reinstatement in 2002 of subsidies for maize seed and fertilizer through the Fertilizer and Farmer Input Support Programs (FISP). In the meantime, seed liberalization has led to an array of new, improved maize varieties, most of which are hybrids. This analysis explores the determinants of demand for first-generation (F1) hybrid maize seed in...
Tipo: Working Paper
Palavras-chave: Zambia; Maize; Seed subsidies; Agricultural and Food Policy; Food Security and Poverty.
Ano: 2012
URL: http://purl.umn.edu/123555

DEMAND PROJECTIONS FOR POULTRY PRODUCTS AND POULTRY FEEDS IN BANGLADESH
Provedor de dados: 31
Autores: Islam,   Nabiul.
The analysis carries out demand projections for poultry products and poultry feeds in Bangladesh over the next 20 years. Using separate rural and urban consumption data and income elasticities of demand, the national consumption of eggs is projected to be 5,866 million for 2020. The corresponding consumption of meat is projected to be 307 thousand tons. The estimated use of grains (wheat and maize) as poultry feeds ranges from 867 to 898 thousand tons for the year 2020, depending on the approach adopted. The requirement of wheat as poultry feed is only 8 per cent of the total domestic production while the requirement of maize as poultry feed is as high as nearly 8 times its domestic production.
Tipo: Working or Discussion Paper
Palavras-chave: Demand and Price Analysis; Livestock Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/16223

Demanda de tortilla de maíz en México, 1996-2008.
Provedor de dados: 32
Autores: Retes Mantilla, Rogel Fernando.
La tortilla de maíz (Zea mays L.) es un alimento fundamental en la dieta de los mexicanos ya que representa el 38.8 % de las proteínas, 45.2 % de las calorías y 49.1 % del calcio de su ingesta diaria. Sin embargo, su demanda disminuyó 36.7 % de 1996 a 2008. Por lo que, el presente trabajo tuvo como objetivo identificar los principales factores económicos que determinan el comportamiento de la demanda de tortilla de maíz en México por estratos de ingreso y medir el orden de magnitud en que dichos factores afectan a la demanda. Para tal efecto se formularon, estimaron, y validaron tres diferentes modelos uniecuacionales del comportamiento de su demanda para dichos estratos, utilizando el consumo per cápita que se derivó de los datos del gasto trimestral de...
Palavras-chave: Alimento básico; Bien inferior; Bien sustituto; Gasto; Precio; Basic food; Inferior good; Substitute goods; Expenditure; Price; Doctorado; Economía.
Ano: 2010
URL: http://hdl.handle.net/10521/241

Demanda de tortilla de maíz en México, 1996-2008.
Provedor de dados: 32
Autores: Retes Mantilla, Rogel Fernando.
La tortilla de maíz (Zea mays L.) es un alimento fundamental en la dieta de los mexicanos ya que representa el 38.8 % de las proteínas, 45.2 % de las calorías y 49.1 % del calcio de su ingesta diaria. Sin embargo, su demanda disminuyó 36.7 % de 1996 a 2008. Por lo que, el presente trabajo tuvo como objetivo identificar los principales factores económicos que determinan el comportamiento de la demanda de tortilla de maíz en México por estratos de ingreso y medir el orden de magnitud en que dichos factores afectan a la demanda. Para tal efecto se formularon, estimaron, y validaron tres diferentes modelos uniecuacionales del comportamiento de su demanda para dichos estratos, utilizando el consumo per cápita que se derivó de los datos del gasto trimestral de...
Palavras-chave: Alimento básico; Bien inferior; Bien sustituto; Gasto; Precio; Basic food; Inferior good; Substitute goods; Expenditure; Price; Doctorado; Economía.
Ano: 2010
URL: http://hdl.handle.net/10521/241

Demonstration of corn production on a large scale planting under mechanization
Provedor de dados: 106
3 tables
Palavras-chave: Corn; Maize; Corn production; Demonstration; Farm machinery; Mechanization; Yields; Production costs; ข้าวโพด; การผลิต; แปลงสาธิต; เครื่องจักรกลเกษตร.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3812

Demonstration of Hoeing Machines in Arable Farming
Provedor de dados: 21
Autores: Alföldi, Thomas.
The video presents different hoeing devices for various conditions; at the demonstration, they are applied in sunflowers and maize.    Organic farming consultant Milo Stoecklin also highlights the importance of machine demonstration events to encourage conventional farmers to convert to organic farming.
Tipo: Practice tool
Palavras-chave: Production systems; Buildings and machinery; Weed management.
Ano: 2011
URL: http://orgprints.org/30997/1/video.php_y%3Dhttps_%252F%252Fwww.youtube.com%252Fwatch_v%3DWm1a1HKHTQQ

Densidade aparente e porosidade do solo no desenvolvimento do milho.
Provedor de dados: 14
Autores: BAENA, A. R. C.; DUTRA, S.
bitstream/item/59280/1/CPATU-ComTec24.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Desenvolvimento; Densidade; Maize; Development; Growth.; Crescimento; Milho; Porosidade; Solo; Zea Mays.; Density; Porosity; Soil.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376654

Department of Agricultural Extension corn and sorghum seed production
Provedor de dados: 106
Autores: Petcharat Wannapee.
Palavras-chave: Corn; Maize; Sorghum; Seed production; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4115

Dependência espacial de plantas daninhas em lavoura de milho cultivado em plantio direto no cerrado.
Provedor de dados: 14
Autores: FONTES, J. R. A.; SHIRATSUCHI, L. S.
bitstream/CPAC-2009/26793/1/p2005_05.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Planta daninha; Distribuição espacial; Maize; Zero tillage; Natural distribution.; Mapa; Milho; Plantio Direto; Zea Mays.; Cartography; Weeds.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569417

Deregulation of Lesotho's maize market
Provedor de dados: 31
Autores: van Schalkwyk,   Herman D.; van Zyl,   Johan; Botha,   P.W.; Bayley,   B.
During the past year, there have been major policy reforms in Lesotho and South Africa with respect to maize pricing and marketing. In Lesotho the impact of deregulation on producers, consumers and government revenues was substantially lower than it should have been, and as a result Lesotho was not able to reap the full benefits of these changes. This is partly because information on the changes to the maize marketing system did not reach the potential beneficiaries of the new system. Free and easily accessible information is an essential element of a free market system. SACU countries must ensure the availability of information if they want to compete internationally.
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy; Crop Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/54723

Deregulation of the Maize Marketing System of Swaziland and Implications for Food Security
Provedor de dados: 31
Autores: Mashinini,   Nkosazana N.; Obi,   Ajuruchukwu; van Schalkwyk,   Herman D.
Recent shortfalls in the supply of maize in the Kingdom of Swaziland have exacerbated the country's growing food insecurity and led to fresh calls for full deregulation of the maize marketing system. The proponents of deregulation believe that it eliminates inefficient production and service units by transferring resources to their best alternative uses. While the theoretical foundations for that position are not questionable, no studies have to date explicitly investigated the effects of the current arrangements and the potential effects of full deregulation. This paper reports on a study that examined the welfare effects of the regulation of the country's maize industry and considered the likely impacts of full deregulation of the industry. Using a...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries; Food Security and Poverty; D6; F13; I3; L5; Q18.
Ano: 2006
URL: http://purl.umn.edu/25511

Desarrollo floral del Cacto de Navidad (Schlumbergera truncata) y deshidratación de sus flores
Provedor de dados: 32
Autores: Martínez Aispuro, Ana Patricia.
Schlumbergera truncata (Worth) Moran, es una cactácea epífita originaria de Brazil, donde se le conoce como flor de Mayo y que debido a la belleza de su flor cigomorfa es ampliamente  utilizada como planta ornamental de maceta en Estados Unidos de Norteamérica y de países de Europa y Asia, donde se le conoce como Cacto de Navidad. En México es poco conocida, pero se considera que tiene amplias perspectivas en la horticultura ornamental del país. Esta investigación tuvo los siguientes objetivos: 1) caracterizar el desarrollo de las yemas florales, 2) determinar la relación entre este desarrollo y la temperatura del aire, 3) deshidratar la flor con el objetivo de prolongar su uso ornamental conservando su forma y color entre otras características, y 4)...
Tipo: Tesis
Palavras-chave: Schlumbergera truncata; Grados día de desarrollo; Deshidratación de la flor; Preservación de la flor; Schlumbergera truncata; Growing degree days; Flowers dehydration; Flowers preservation.
Ano: 2007
URL: http://hdl.handle.net/10521/1572

Desarrollo y validación de marcadores moleculares para identificar genotipos de maíz de calidad proteínica.
Provedor de dados: 32
Autores: Hernández Rodríguez, Martha.
El maíz (Zea mays L.) de calidad proteínica (QPM) es nutricionalmente superior en comparación con el maíz normal, porque produce semillas con casi el doble de los aminoácidos (aa) lisina (Lys) y triptófano (Trp), esenciales para la síntesis endógena de la vitamina B niacina. Actualmente, la conversión de una línea de maíz normal a una QPM, se acelera mediante la selección asistida por marcadores moleculares (MAS) y métodos de detección química. En este estudio se reporta el desarrollo y validación de marcadores basados en polimorfismos de un solo nucleótido (SNPs) para los loci opaque-2 (o2) y Ask-2, involucrados en la genética de los QPM, así como la interacción de ambos loci para el contenido de 11 aa en el endospermo de dos poblaciones F2 de maíz,...
Palavras-chave: Zea mays; Opaque-2; Ask-2; MAS; QPM; SNP; SSCP; Genética; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2319

Desde o começo.
Provedor de dados: 14
Autores: CRUZ, I.
bitstream/item/41580/1/Desde-comeco.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Controle; Maize; Pest; Control.; Milho; Praga; Zea Mays.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/483400

Desempenho agronômico de milho, feijão, soja e abóbora em sistema orgânico de monocultivo e consórcio.
Provedor de dados: 21
Autores: Veiga Silva, Julio Carlos Bittencourt; Comin, Jucinei José.
Comparou-se quatro sistemas de consórcio em relação ao monocultivo em um experimento a campo sob manejo orgânico, na safra 2006/2007, em um Gleissolo Melânico Alumínico típico em Pinhais PR. Os tratamentos foram: i) milho + feijão + abóbora (MFA) ; ii) milho + soja + abóbora (MAS) ; iii) milho + feijão (MF); iv) milho + soja (MS); v) milho (M); vi) feijão (F); vii) soja (S); e viii) abóbora (A). Avaliou-se a produção comercial, a produção de matéria seca (MSS), o uso eficiente da terra (UET), o rendimento em dias/homem/ha na realização de capinas e o retorno monetário relativo à mão de obra utilizada. Os consórcios, em geral, apresentaram melhor desempenho, com destaque para MFA, o qual obteve o maior rendimento das culturas, de MSS, melhor UET e retorno...
Tipo: Journal paper
Palavras-chave: Production systems Farming Systems Cereals; Pulses and oilseeds Crop husbandry.
Ano: 2013
URL: http://orgprints.org/25664/1/Veiga%20Silva_Desempenho%20agron%C3%B4mico%20de%20milho%2C%20feij%C3%A3o%2C%20soja%20e%20ab%C3%B3bora%20em%20sistema%20org%C3%A2nico.pdf

Desempenho agronômico de novos híbridos de milho-pipoca no Noroeste do Estado do Paraná - DOI: 10.4025/actasciagron.v31i1.4142
Provedor de dados: 1
Autores: Vieira, Rafael Augusto; UEM; Rodovalho, Marcos de Araújo; UEM; Scapim, Carlos Alberto; UEM; Tessmann, Dauri José; UEM; Amaral Júnior, Antônio Teixeira do; UENF; Bignotto, Lucas Souto; UEM.
In maize, variations on agronomic performance in distinct environments are common and more evident for one-way hybrids. The objective of this work was to evaluate the performance of new one-way popcorn hybrids developed by the Breeding Program of the State University of Maringá, in northwestern Paraná. The characteristics evaluated were: grain yield, popping expansion, plant height, ear height and the intensity of Southern rust (Puccinia polysora), Northern leaf blight (Exserohilum turcicum), and phaeosphaeria leaf spot (Phaeosphaeria maydis/Pantoea ananas). The assay was carried out into randomized block design with three replications in Maringá, state of Paraná, Brazil, during the 2006/2007 cropping season. The treatments were 27 simple popcorn hybrids...
Palavras-chave: 5.01.03.05-9 Melhoramento Vegetal Zea mays L.; Rendimento de grãos; Capacidade de expansão; Doenças foliares Zea mays L.; Grain yield; Popping expansion; Leaf diseases.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4142

Desempenho agronômico de variedades crioulas e híbridos de milho cultivados em diferentes sistemas de manejo.
Provedor de dados: 21
Autores: Araujo, Alisson Vinicius de; Brandão Junior, Delacyr da Silva; Ferreira, Izabel Cristina Pereira Vaz; Costa, Cândido Alves da; Porto, Bruna Béssel Almeida; Korsgaard, Maren.
Apesar das variedades crioulas favorecerem a autonomia no processo produtivo na agricultura familiar, tem-se observado o seu abandono ao elevar-se o nível tecnológico empregado na lavoura, acreditando-se que apenas os cultivares modernos apresentam retorno econômico. Dessa forma, o objetivo deste trabalho foi verificar a influência de diferentes sistemas tecnológicos de manejo sobre os caracteres agronômicos de milho, provenientes de duas variedades crioulas ('Argentino' e 'BR da Várzea') e de dois híbridos. Os sistemas de manejo foram classificados como baixo, médio e alto nível tecnológico. O experimento foi conduzido em esquema fatorial 4x3 (quatro genótipos de milho e três sistemas tecnológicos de manejo), em delineamento em blocos completos...
Tipo: Journal paper
Palavras-chave: Farm economics; Farming Systems.
Ano: 2013
URL: http://orgprints.org/29034/1/Araujo_desempenho.pdf

Desempenho de leitões da raça Piau alimentados com o milho BR 451.
Provedor de dados: 14
Autores: MOREIRA, H. A.; MONTEIRO, M. A. R.; SACRAMENTO, A. J. R. do; TEIXEIRA, E. W.
bitstream/item/30640/1/Pesq.And.-8.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: BR 451; Maize.; Leitão; Milho; Nutrição Animal; Suíno; Zea Mays.; Animal nutrition; Swine.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478739

Desenvolvimento e acúmulo de macronutrientes em plantas de milho biofertilizadas com manipueira.
Provedor de dados: 21
Autores: Barreto, Marcela T. L.; Magalhães, Adriana G.; Rolim, Mario M.; Pedrosa, Elvira M. R.; Duarte, Anamaria de S.; Tavares, Uilka E.
Objetivou-se, neste estudo, avaliar o desenvolvimento vegetativo e o acúmulo de macronutrientes em plantas de milho submetidas às doses de manipueira. O experimento foi conduzido em ambiente protegido no período de março a maio de 2011. O delineamento experimental foi inteiramente casualizado em esquema fatorial 2 (tipos de solo: franco-arenoso e franco-argiloso) × 4 (doses de manipueira: 0; 11,2; 22,4 e 44,8 m3 ha-1), com oito repetições. As variáveis analisadas foram: altura das plantas, diâmetro de colmos, número de folhas, matéria fresca e matéria seca da parte aérea das plantas e teores de N, P, K, Ca e Mg no tecido foliar. O aumento das doses de manipueira elevou o conteúdo de massa fresca, o teor de nitrogênio e potássio da parte aérea das plantas,...
Tipo: Journal paper
Palavras-chave: Crop husbandry; Soil.
Ano: 2013
URL: http://orgprints.org/29075/1/Barreto_Desenvolvimento.pdf

Desenvolvimento instrumental para determinação direta da perda de água em plantas por meio do monitoramento do fluxo de seiva - DOI: 10.4025/actasciagron.v27i4.1692
Provedor de dados: 1
Autores: Santos, Antonio Odair; IAC; Bigas-Adão, Francisca Maria Rosiki; IAC; Barros, Camila de; IAC; Hernandez, José Luiz; IAC.
O monitoramento das necessidades hídricas é fundamental para o controle minucioso da irrigação. Métodos não-fixos, portáteis e precisos se fazem necessários para a correta determinação do consumo hídrico, em cultivos agrícolas. Um experimento sobre a questão foi conduzido no IAC/Jundiaí, Estado de São Paulo. Um sistema integrado, baseado na marcação de seiva por micro-pulsos regulares de calor, foi desenvolvido para determinação contínua da curva da perda de água. Diferentes configurações na montagem de sensores foram testadas, buscando-se encontrar o melhor perfil para uso a campo, com base em materiais e em processos nacionais. O protótipo foi calibrado em milho envasado e testado a campo. Medições feitas no caule da cultura evidenciaram coerentes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.03.00.00-8    Engenharia Agrícola irrigação; Transpiração; Milho 5.03.00.00-8    Engenharia Agrícola.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1692

Desenvolvimento rural e práticas tradicionais de agricultores familiares: o caso do milho no vale do Capivari, Santa Catarina, Brasil.
Provedor de dados: 21
Autores: Rebollar, Paola Beatriz May; Miller, Paul Richard Momsen; Carmo, Victor Barbosa do.
A diversidade genética do milho é importante para milhões de famílias de agricultores em todo o mundo. A existência de populações de milho crioulo tem forte relação com processos sociais específicos. Este estudo busca compreender estes processos sociais e sua relação com as políticas de desenvolvimento rural brasileiras. Entre junho de 2006 e novembro de 2009, 13 famílias de agricultores em 3 municípios do vale do Capivari foram entrevistados e visitados diversas vezes para a coleta de dados qualitativos. A partir da análise dos resultados, é possível afirmar que políticas de desenvolvimento rural contribuíram para modificar os processos sociais que historicamente promoveram a diversidade genética do milho. Apesar disso, algumas famílias de agricultores...
Tipo: Journal paper
Palavras-chave: Production systems Cereals; Pulses and oilseeds Crop husbandry.
Ano: 2010
URL: http://orgprints.org/24534/1/Rebollar_Desenvolvimento.pdf

Design and development of maize peeler for farmers in Bangladesh
Provedor de dados: 111
Autores: Jahan, Nusrat; Hoque, Muhammad Arshadul; Sheikh, Muhammad Shofiqul Islam; Gulandaz, Muhammad Ashrafuzzaman.
Hand peeling of maize is common practice before shelling in Bangladesh. The main problems of hand peeling are that these require more time and increase labour cost. A maize peeling machine has been designed and fabricated in Farm Machinery and Postharvest Process Engineering Divisional workshop, BARI, Gazipur during 2016-2017 which reduce the human power in peeling operation of maize. This maize peeler can be very helpful for medium and small scale farmer. Two rubber and two spiral rollers were used for peeling of cobs. The functional parts of the machine are hopper, spiral roller and rubber roller. For the peeling operation moisture content of maize cobs were taken 20%- 24% (w b). The peeling capacities of the manual and power peelings were 87 kg/h and...
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5419

Design and fabrication of a locally made motorized multi-grain crop planter
Provedor de dados: 111
Autores: Soyoye, Babatunde Oluwamayokun.
Grain crops have been of great importance in providing food for man, feed for livestock and raw materials for some agro-based industries.  Studies in grain crops production in different parts of Nigeria have shown an increasing importance of the crops amidst growing utilization by food processing industries and livestock feed mills.  The pre-design experimentation was carried out on yellow maize (Zea mays), Ife Brown cowpea (Phaseolus vulgaris), Seed soybean (Glycine max) and groundnut (Arachis hypogaea L). Some of the properties determined include size, geometric mean diameter, surface area and angle of friction. A locally made motorized vertical seed-plate grain crops planter was designed, fabricated and assembled.  Design criteria, calculations and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural and Environmental Engineering; Farm Power and Machinery option grain crop  planter  motorize  design and fabrication.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5633

DESIGN AND FABRICATION OF A SCREW CONVEYOR
Provedor de dados: 111
Autores: Olanrewaju, Taofiq Olayinka.
Grain must be transported from one location to another. Several disadvantages are associated with grain transportation, especially manual loading into trailers and silos. The need for a grain handling equipment became pertinent; hence, this study designed and fabricated a simple and medium size auger aimed at conveying grains upward into a silo. The conveyor was fabricated from pure local materials considering the techno – economic properties. Tests were run on the conveyor using granular materials like maize, sorghum and gari at 13% moisture content. The angles of test were 00, 150, 300, 450, and 600 for each grain. It was found capable of loading an average size silo of 2.68 m3 in 15 minutes. The conveyor has an efficiency of 99.95%, and average output...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grain; Conveyor; Auger; Capacity.
Ano: 2017
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4097

Design and Performance Evaluation of a Geothermal Dryer for Maize Drying
Provedor de dados: 111
Autores: KANJUKI GITU, PATRICK; BOOKER OSODO; WILLIS AMBUSSO.
Exploiting geothermal energy to dry crops needs a properly designed geothermal crop dryer that is sized to meet the drying requirements of the crops to be dried. This study designed and fabricated a geothermal maize dryer that was tested to determine the drying time required to drying maize grains to 13% moisture content at Menengai Geothermal Project site within Nakuru County, Kenya. The main components of the geothermal dryer comprised of a dryer cabinet, heat exchanger, and fan unit. Once the air used for maize drying was heated by the heat exchanger, the sized fan unit blew hot air across the maize grains. Geothermal water from a discharging well within the project site supplied the heat to the sized heat exchanger. The designed geothermal maize dryer...
Tipo: Info:eu-repo/semantics/article
Ano: 2024
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/9095

Design of a multipurpose agricultural vehicle and attachments for developing countries
Provedor de dados: 111
Autores: Lumkes, John H.
Many places in the developing world, particularly in Sub-Saharan Africa (SSA), lack affordable Intermediate Means of Transport (IMTs) and agricultural machinery. Cameroon, located in Central Africa, has only 19 motor vehicles per 1000 people. Available transportation options are often unreliable, have a small load capacity, or are expensive to purchase and maintain. SSA lags behind other developing regions in the use of tractors, a representative indicator of agricultural mechanization. The absence of appropriate agricultural mechanization limits productivity, the income of individual farmers, and economic growth. A Practical Utility Platform (PUP) was developed by Purdue University in partnership with the African Centre for Renewable Energy and...
Tipo: Info:eu-repo/semantics/article
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3067

Design specifications of a human-powered planter
Provedor de dados: 65
Autores: Stefanello,Giusepe; Machado,Antônio Lilles Tavares; Reis,Ângelo Vieira dos; Machado,Roberto Lilles Tavares; Morais,César Silva de.
ABSTRACT: This study aimed to establish the design specifications of a human-powered punch planter for maize and beans through the application of a systematic design methodology. The most important design requirements and their specifications are related to technical performance and production cost.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Machinery design; Manual seeder; Agricultural machinery.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202118

Designing U.S. Corn Grades to Reflect End Use Value
Provedor de dados: 31
Autores: Reimer,   Jeffrey J.; Hill,   Lowell D.
The 1986 U.S. Grain Quality Improvement Act introduced an explicit, economic purpose for grades-that they transmit information about end use value-but provided little guidance about what factors to include in grades.  We determined which quality characteristics best reflect the processed value of U.S. corn in the case of a Japanese wet miller.  Foreign material is the only grade factor closely related to processed value, but a large number of nongrade attributes, many of which reflect the intrinsic properties of corn, are found to vary substantially across shipments and to provide extensive information about value.  Recommendations for U.S. grades are made.
Tipo: Journal Article
Palavras-chave: Commodity marketing; Corn; Grades; Maize; Quality information; L15; Q13.
Ano: 2003
URL: http://purl.umn.edu/37311

Detecção de patógenos causadores de enfezamento no estado do Paraná na safrinha 2019.
Provedor de dados: 14
Autores: COTA, L. V.; SILVA, D. D. da; MEIRELLES, W. F.; SOUZA, I. R. P. de; OLIVEIRA, I. R. de; COSTA, R. V. da; MENDES, S. M.
Entre as doenças que incidem na cultura do milho destacam-se os enfezamentos. Eles têm sido doenças preocupantes nas últimas safras, com perdas severas em diversas regiões do país. Em milho, dois sintomas de enfezamento são conhecidos, enfezamento-pálido e enfezamento-vermelho, ocasionados pelo procarionte Spiroplasma kunkelii Whitcomb (Corn stunt spyroplasma) e por Phytoplasma (Maize bushy stunt phytoplasma), respectivamente. Para o adequado manejo dos enfezamentos são imprescindíveis o diagnóstico correto e a identificação do patógeno. Neste trabalho objetivou-se identificar quais patógenos causam enfezamentos em milho no estado do Paraná. Locais com relato de ocorrência de enfezamentos na cultura do milho na safrinha 2019 no Paraná foram visitados para...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Doença de Planta; Zea Mays; Patógeno.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1121325

Detección de Erwinia  chrysanthemi pv zeae (Sabet 1954) Victoria et al., 1975 en maíz en Morelos, México.
Provedor de dados: 32
Autores: Durán Peralta, Elisa.
La “pudrición del tallo del maíz” causada por Erwinia chrysanthemi pv zeae es una de las principales enfermedades del maíz (Zea mays L.) en los países tropicales y subtropicales. En el presente trabajo se realizó la  extracción  de ADN del patógeno y se realizó PCR  utilizando los iniciadores ADE1 y ADE2, diseñados para E. chrysanthemi (Burkh.) Young et al. 1978,   que amplifican un fragmento de 420pb del gen pelADE. Se demostró que estos también pueden ser utilizados para su detección por PCR en tiempo real con resultados similares a los citados en la literatura; sin embargo no pueden ser empleados para la cuantificación de la bacteria debido a la formación de estructuras secundarias. Mediante la caracterización fisiológica, bioquímica y análisis...
Palavras-chave: Zea mays L.; Erwinia chrysanthemi pv zeae; Pudrición del tallo del maíz; PCR en tiempo real; Gen pe/ADE; Corn stalk rot; Real time PCR; Gene Pe/ADE; Fitopatología; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/555

Detección de Erwinia  chrysanthemi pv zeae (Sabet 1954) Victoria et al., 1975 en maíz en Morelos, México.
Provedor de dados: 32
Autores: Durán Peralta, Elisa.
La “pudrición del tallo del maíz” causada por Erwinia chrysanthemi pv zeae es una de las principales enfermedades del maíz (Zea mays L.) en los países tropicales y subtropicales. En el presente trabajo se realizó la  extracción  de ADN del patógeno y se realizó PCR  utilizando los iniciadores ADE1 y ADE2, diseñados para E. chrysanthemi (Burkh.) Young et al. 1978,   que amplifican un fragmento de 420pb del gen pelADE. Se demostró que estos también pueden ser utilizados para su detección por PCR en tiempo real con resultados similares a los citados en la literatura; sin embargo no pueden ser empleados para la cuantificación de la bacteria debido a la formación de estructuras secundarias. Mediante la caracterización fisiológica, bioquímica y análisis...
Palavras-chave: Zea mays L.; Erwinia chrysanthemi pv zeae; Pudrición del tallo del maíz; PCR en tiempo real; Gen pe/ADE; Corn stalk rot; Real time PCR; Gene Pe/ADE; Fitopatología; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/555

Detección de transgenes en variedades nativas de maíz en dos regiones del estado de Puebla.
Provedor de dados: 32
Autores: Carreón Herrera, Nayelli Itzell.
La presencia de transgenes en variedades nativas de maíz mexicano ha sido motivo de controversia. Se sospecha una posible introducción a través de las tiendas rurales DICONSA (TRD). El objetivo de este estudio fue precisar si plantas provenientes del grano expendido por las TRD al sembrarse llegan a antesis, y si esta coincide con la floración femenina de los maíces nativos de municipios de la Mixteca Baja en el Estado de Puebla. También se buscó  cuantificar secuencias transgénicas, particularmente el promotor  del Virus  Mosaico de la coliflor (CaMV, por sus siglas en inglés) -35S en variedades nativas de maíz y en granos provenientes de TRD. Para el primer objetivo, en 2008 se establecieron dos experimentos en campo evaluando 46 poblaciones nativas y 23...
Palavras-chave: Maíz transgénico; Variedades nativas; Maíces nativos; Dinámica de floración; Promotor CaMV-35S; PCR Tiempo-Real; Flujo génico; Transgenic maize; Maize landraces; CaMV-35S promoter; RT-PCR; Gene flow; Flowering dynamics; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2011
URL: http://hdl.handle.net/10521/439

Detección de transgenes en variedades nativas de maíz en dos regiones del estado de Puebla.
Provedor de dados: 32
Autores: Carreón Herrera, Nayelli Itzell.
La presencia de transgenes en variedades nativas de maíz mexicano ha sido motivo de controversia. Se sospecha una posible introducción a través de las tiendas rurales DICONSA (TRD). El objetivo de este estudio fue precisar si plantas provenientes del grano expendido por las TRD al sembrarse llegan a antesis, y si esta coincide con la floración femenina de los maíces nativos de municipios de la Mixteca Baja en el Estado de Puebla. También se buscó  cuantificar secuencias transgénicas, particularmente el promotor  del Virus  Mosaico de la coliflor (CaMV, por sus siglas en inglés) -35S en variedades nativas de maíz y en granos provenientes de TRD. Para el primer objetivo, en 2008 se establecieron dos experimentos en campo evaluando 46 poblaciones nativas y 23...
Palavras-chave: Maíz transgénico; Variedades nativas; Maíces nativos; Dinámica de floración; Promotor CaMV-35S; PCR Tiempo-Real; Flujo génico; Transgenic maize; Maize landraces; CaMV-35S promoter; RT-PCR; Gene flow; Flowering dynamics; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2011
URL: http://hdl.handle.net/10521/439

Detección e incidencia del fitoplasma Maize Bushy Stunt y su relación con el rendimiento en maíz en el Estado de Veracruz, México
Provedor de dados: 32
Autores: Alcántara Mendoza, Susana.
Una nueva enfermedad del maíz apareció en el estado de Veracruz, México durante 2003-2004. Síntomas de amarillamiento, enrojecimiento y posterior quemado de hojas, proliferación de mazorcas, jilotes raquíticos, falta de fecundación y granos vanos fueron parte del síndrome de la enfermedad. El fitoplasma Maize Bushy Stunt (MBS) se identifico por PCR se detectó en plantas con los síntomas antes descritos, en los municipios de Tlalixcoyan, Cosoleacaque y Paso de Ovejas en 2006 y 2007. Los genotipos CP-562, 30F83, 30F92, Orca, 30F96, Nutria y Asgrow 7573 resultaron positivos a la presencia del MBS, mientras que en 3086, 30F97 y CP-560 no se detectó la presencia del MBS en una plantación experimental en plantas sintomáticas en Tlalixcoyan, Ver. en 2006 y 2007....
Tipo: Tesis
Palavras-chave: Maize Bushy Stunt; PCR; Incidencia; Resistencia genética; Genoma y  homología; Maestría; Fitopatología; Maize Bushy Stunt; Incidence; Genetic resistance; Genome and homology.
Ano: 2009
URL: http://hdl.handle.net/10521/1574

Detección e incidencia del fitoplasma Maize Bushy Stunt y su relación con el rendimiento en maíz en el estado de Veracruz, México
Provedor de dados: 32
Autores: Alcántara Mendoza, Susana.
Una nueva enfermedad del maíz apareció en el estado de Veracruz, México durante 2003-2004. Síntomas de amarillamiento, enrojecimiento y posterior quemado de hojas, proliferación de mazorcas, jilotes raquíticos, falta de fecundación y granos vanos fueron parte del síndrome de la enfermedad. El fitoplasma Maize Bushy Stunt (MBS) se identifico por PCR se detectó en plantas con los síntomas antes descritos, en los municipios de Tlalixcoyan, Cosoleacaque y Paso de Ovejas en 2006 y 2007. Los genotipos CP-562, 30F83, 30F92, Orca, 30F96, Nutria y Asgrow 7573 resultaron positivos a la presencia del MBS, mientras que en 3086, 30F97 y CP-560 no se detectó la presencia del MBS en una plantación experimental en plantas sintomáticas en Tlalixcoyan, Ver. en 2006 y 2007....
Palavras-chave: Maize Bushy Stunt; PCR; Incidencia; Resistencia genética; Genoma; Homología; Incidence; Genetic resistance; Genome; Homology; Maestría en Ciencias; Postgrado en Fitosanidad; Fitopatología.
Ano: 2009
URL: http://hdl.handle.net/10521/53

Detección e incidencia del fitoplasma Maize Bushy Stunt y su relación con el rendimiento en maíz en el estado de Veracruz, México
Provedor de dados: 32
Autores: Alcántara Mendoza, Susana.
Una nueva enfermedad del maíz apareció en el estado de Veracruz, México durante 2003-2004. Síntomas de amarillamiento, enrojecimiento y posterior quemado de hojas, proliferación de mazorcas, jilotes raquíticos, falta de fecundación y granos vanos fueron parte del síndrome de la enfermedad. El fitoplasma Maize Bushy Stunt (MBS) se identifico por PCR se detectó en plantas con los síntomas antes descritos, en los municipios de Tlalixcoyan, Cosoleacaque y Paso de Ovejas en 2006 y 2007. Los genotipos CP-562, 30F83, 30F92, Orca, 30F96, Nutria y Asgrow 7573 resultaron positivos a la presencia del MBS, mientras que en 3086, 30F97 y CP-560 no se detectó la presencia del MBS en una plantación experimental en plantas sintomáticas en Tlalixcoyan, Ver. en 2006 y 2007....
Palavras-chave: Maize Bushy Stunt; PCR; Incidencia; Resistencia genética; Genoma; Homología; Incidence; Genetic resistance; Genome; Homology; Maestría; Postgrado en Fitosanidad; Fitopatología.
Ano: 2009
URL: http://hdl.handle.net/10521/53

Detecting adventitious transgenic events in a maize center of diversity
Provedor de dados: 69
Autores: Gamarra,Luis Fernando Rimachi; Delgado,Jorge Alcántara; Villasante,Yeny Aquino; Ortiz,Rodomiro.
Background: The genetic diversity of maize in Peru includes several landraces (within race clusters) and modern open pollinated and hybrid cultivars that are grown by farmers across various regions, thereby making this country a secondary center of diversity for this crop. A main topic of controversy in recent years refers to the unintended presence of transgenic events in locally grown cultivars at main centers of crop diversity. Peru does not yet have biosafety regulations to control or permit the growing of genetically modified crops. Hence, the aim of this research was to undertake a survey in the valley of Barranca, where there were recent claims of authorized transgenic maize grown in farmers fields as well as in samples taken from feed storage and...
Tipo: Journal article
Palavras-chave: Biosafety; Corn; Sampling; Transgenes; Zea mays.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000400009

Detection of transgenic events in maize using immunochromatographic strip test and conventional PCR
Provedor de dados: 64
Autores: Cantelmo,Narjara Fonseca; Von Pinho,Édila Vilela de Resende; Von Pinho,Renzo Garcia; Von Pinho,Iolanda Vilela; Nascimento,Micaela Sandim.
With the growth in the transgenic market, fast and economically viable methodologies are necessary for undertaking transgene detection tests, both for identification of contamination in seeds and in grain. Seeds from commercial conventional GNZ 2004, and transgenic VT-Pro (MON89034), Roundup Ready (NK603) and Herculex (TC1507) maize cultivars were used. In order to simulate different levels of contamination, the transgenic seeds were mixed with conventional seeds at levels of 0.2%, 0.4%, 1.0% and 1.6% for VT-Pro, and 0.2%, 0.5%, 0.8% and 1.2% for Roundup Ready and Herculex. The lateral flow membrane strip test was performed in the whole seed, endosperm and embryo. For evaluation of the specificity of the technique in detection of the TC1507 event by means...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fast testing; Contamination; Specificity; Transgenesis.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500003

Detection strategies for non-authorized GMO products on the European market
Provedor de dados: 17
Autores: Patrick G&amp;#xfc;rtler; Esther  Meissner; Ulrich  Busch.
Import and planting of biotech crops is strictly regulated in Europe. In order to observe these strict regulations, an efficient surveillance of the European market is required. In Europe, data on authorised biotech crops from foreign countries are on hand, however, only scarce information on non-authorised biotech crops is available. Experience of the last years has shown that non-authorized biotech crops (e.g. biotech-papaya, Bt10-maize, LL601-rice and Bt63-rice) were detected on the European market. The Bavarian Health and Food Safety Authority is responsible for the detection of illegal imports and for labelling control of Food and Feed in Bavaria (Germany). The quantitative real-time PCR is the method of choice for the detection of genetic...
Tipo: Poster
Palavras-chave: Biotechnology; Plant Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4444/version/1

Determinación de las zonas productoras de maíz (Zea mays L.) más competitivos y con mayor potencial productivo en el Estado de México.
Provedor de dados: 32
Autores: Ramírez Jaspeado, Rocío.
El Estado de México presenta un importante déficit en la producción de maíz (Zea mays L.). El 49% de su consumo es abastecido mediante importaciones. El Gobierno a través de programas está tratando de reducir dicho déficit. Con la finalidad de centrar los esfuerzos del Gobierno para aumentar la competitividad de maíz es necesario identificar las zonas de producción más competitivas e incrementar su productividad mediante el uso de semilla mejorada y paquetes tecnológicos. Para identificar dichas regiones se usó un modelo de equilibrio espacial e inter-temporal, el cual permite determinar la competitividad en base a la ganancia neta considerando la producción, el consumo y las importaciones del año promedio 2008/2010, así como la distribución de la...
Palavras-chave: Zea mays L.; Producción; Consumo; Importaciones; Déficit; Modelo de equilibrio espacial e inter-temporal; Production; Consumption; Imports; Deficit; Economía; Doctorado; Deficit model of spatial and inter-temporal equilibrium.
Ano: 2014
URL: http://hdl.handle.net/10521/2253

Determinación e interpretación de la calidad del agua y del suelo en el Distrito de Riego 066 Del Valle de Santo Domingo, Baja California Sur.
Provedor de dados: 32
Autores: Marín Celestino, Ana Elizabeth.
La calidad del agua y del suelo en un área agrícola son factores principales que repercuten en su sustentabilidad, debido a que una baja calidad en estos recursos reduce los rendimientos y causa toxicidad en los cultivos entre otros efectos adversos, afectando la productividad de la actividad y al ambiente. En el Distrito de Riego 066 del Valle de Santo Domingo se han detectado alteraciones notables en estos recursos, por esta razón este estudio planteó como objetivo evaluar e interpretar la calidad del agua del acuífero y suelo en el DR 066 y su relación con la producción agrícola. Se colectaron muestras de agua en 600 pozos de riego y de suelo en 710 parcelas; en cada muestra se determinó los siguientes parámetros: pH, CE, RAS, cationes, aniones, metales...
Palavras-chave: Calidad del agua; Calidad del suelo; Contaminación agrícola; Estándares de calidad; Hidrociencias; Doctorado; Water quality; Soil quality; Agricultural contamination; Quality standards.
Ano: 2012
URL: http://hdl.handle.net/10521/1786

Determinants for Use of Certified Maize Seed and the Relative Importance of Transaction Costs
Provedor de dados: 31
Autores: Bernard,   Munyua; Hellin,   Jonathan; Nyikal,   Rose Adhiambo; Mburu,   John G.
The rising world prices for major tradable staples such as maize have been a concern for sub- Saharan countries such as Kenya which are maize deficit countries. Maize is a major staple food for over 80 percent of Kenya’s population. Kenya relies on maize for up to 40 percent of its dietary energy supply and is accordingly searching for ways to increase maize productivity. Maize productivity has been rising in the last decade manly as a result of the use of improved germplasm and fertilizer. However, the proportion of farmers using these technologies is low and the aggregate productivity in maize is low compared to other countries and its potential. Previous studies on input adoption have often assumed the existence of perfect supply and product markets,...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/96423

Determinants of adoption and intensity of use of balanced nutrient management systems technologies in the northern Guinea savanna of Nigeria
Provedor de dados: 31
Autores: Akinola,   Adebayo A.; Arega,   D.A.; Adeyemo,   Remi; Sanogo,   Diakalia; Olanrewaju,   Adetunji S.; Nwoke,   C.; Nzigaheba,   G.; Diels,   J.
As part of a major effort to address soil fertility decline in West Africa, a project on Balanced Nutrient Management Systems (BNMS) has since 2000 been implemented in the northern Guinea savanna (NGS) of Nigeria. The project has tested and promoted two major technology packages, including a combined application of inorganic fertilizer and manure (BNMS-manure) and a soybean/maize rotation practice referred to as BNMS-rotation.  This study employed Tobit model to examine factors that influence the adoption and intensity of utilization of BNMS technologies in the NGS of Nigeria. Results showed that less than 10% of the sample households adopted at least one of the two components of the technology package by the end of 2002.  However, by 2005 the adoption of...
Tipo: Conference Paper or Presentation
Palavras-chave: Adoption; BNMS-manure; BNMS-rotation; Northern Guinea Savanna (NGS).; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; Institutional and Behavioral Economics; International Relations/Trade; Livestock Production/Industries; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/52007

Determinants of adoption and intensity of use of improved maize varieties in the Central Highlands of Ethiopia: A Tobit analysis
Provedor de dados: 31
Autores: Alene,   Arega D.; Poonyth,   Daneswar; Hassan,   Rashid M.
This study employed a Tobit model to examine factors that influence the adoption and intensity of utilisation of improved maize varieties in the West Shoa Zone in the central highlands of Ethiopia. The estimated results indicate that level of education, household labour, farm size, extension services, farm income, and timely availability of improved maize seeds significantly influence the adoption and intensity of use of improved maize. It also showed that the impact of off-farm income and age of the household head on adoption and intensity of use of improved maize seed was insignificant.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/54223

DETERMINANTS OF CEREAL DIVERSITY IN COMMUNITIES AND ON HOUSEHOLD FARMS OF THE NORTHERN ETHIOPIAN HIGHLANDS
Provedor de dados: 31
Autores: Benin,   Samuel; Gebremedhin,   Berhanu; Smale,   Melinda; Pender,   John L.; Ehui,   Simeon K.
On farm conservation of crop diversity poses obvious policy challenges in terms of the design of appropriate incentive mechanisms and possible trade-offs between conservation and productivity. This paper compares factors explaining the inter-specific diversity (diversity among species) and infra-specific diversity (diversity among varieties within a species) of cereal crops grown in communities and on individual farms in the northern Ethiopian highlands.  Using named varieties and ecological indices of spatial diversity (richness, evenness, and inverse dominance), we find that a combination of factors related to the agro-ecology of a community, its access to markets, and the characteristics of its households and farms significantly affect both the inter-...
Tipo: Working or Discussion Paper
Palavras-chave: Household Farms; Communities; Ethiopia; Agrobiodiversity; On Farm Conservation; Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/16101

Determinants of Fertiliser Use by Smallholder Maize Farmers in the Chinyanja Triangle in Malawi, Mozambique and Zambia
Provedor de dados: 31
Autores: Mapila,   Mariam A.T.J.; Njuki,   Jemimah M.; Delve,   Robert J.; Zingore,   Shamie; Matibini,   Josephine.
Farm surveys in Malawi, Zambia and Mozambique were carried out to assess the determinants of fertiliser use given continued low yields, low organic matter and general poor soil health in Southern African soils. Regression modelling showed that fertiliser use was influenced by household and farm characteristics. In addition, it was also influenced by social and human capital and farmers’ perceptions of the effect of fertilisers on soil fertility. Farmers who perceived fertilisers as bad for their soil were less likely to adopt their use.  This is a key result, as the emerging discussions on a green revolution for Africa, as well as the continued food crisis discussion, are prompting increased fertiliser use as an immediate intervention for increasing...
Tipo: Presentation
Palavras-chave: African green revolution; Farmer perceptions; Fertiliser subsidies; Fertiliser use; Human capital; Social capital; Agricultural and Food Policy; Community/Rural/Urban Development.
Ano: 2012
URL: http://purl.umn.edu/123354

Determinants of fertilizer use on maize in Eastern Ethiopia: A weighted endogenous sampling analysis of the extent and intensity of adoption
Provedor de dados: 31
Autores: Fufa,   B.; Hassan,   Rashid M.
Factors influencing the extent and intensity of fertilizer adoption on maize production in Ethiopia were analyzed. A Weighted Endogenous Sampling Maximum Likelihood estimator was used in the specification of a Probit and Tobit fertilizer adoption models. The results have important implications for the formulation of policies and programs targeted to promotion of fertilizer use in small-scale maize production. Those include improved road infrastructure, consideration of weather related crop failure insurance programs, development of drought tolerant cultivars and targeting particular farmer groups.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/31734

Determinants of Improved Maize Seed and Fertilizer Use in Kenya: Policy Implications
Provedor de dados: 31
Autores: Ouma,   James Okuro; De Groote,   Hugo; Owuor,   George.
Maize is a key food crop in Kenya. While maize yields increased from 1.25 t ha-1 in early 1960s to over 2 tonnes in 1982, they fell below 1.5 t ha-1 in 2000. Given the limited land area, there is no doubt that Kenya will have to rely more on modern technologies for increased yields .Use of improved maize varieties and fertilizers will therefore continue to be critical inputs for improving productivity. To improve production, it is important to understand factors determining adoption and intensity of use of modern technologies. A stratified 2-stage sampling design was used to select 1800 households, subsequently interviewed by means of structured questionnaire. Econometric models were used to explore factors influencing adoption and intensity of use of the...
Tipo: Conference Paper or Presentation
Palavras-chave: Maize; Adoption; Improved seed; Fertilizer; Credit; Extension; Kenya; Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/25433

Determinants of Smallholder Commercialization of Food Crops: Theory and Evidence from Ethiopia
Provedor de dados: 31
Autores: Pender,   John L.; Alemu,   Dawit.
In this paper, we develop a theoretical farm household model of food crop production and marketing decisions, derive testable hypotheses concerning the determinants of these decisions, and test these hypotheses, using data on cereal production and marketing collected from a nationally representative survey of 7,186 farm households in Ethiopia. Focusing on production and marketing decisions for teff and maize, the two most important crops in Ethiopia, we find that most producers of these crops are either autarkic or net buyers (especially for maize) and that net buyers and autarkic households are poorer in many respects than net sellers. This implies that interventions to increase cereal productivity will favorably affect distribution for most producers....
Tipo: Working or Discussion Paper
Palavras-chave: Smallholder production; Commercial behavior; Market participation; Cereal crops; Ethiopia; Agribusiness.
Ano: 2007
URL: http://purl.umn.edu/42354

Determination of aspartate kinase activity in maize tissues
Provedor de dados: 63
Autores: Ferreira,Renato Rodrigues; Vendemiatti,Ariane; Gratão,Priscila Lupino; Lea,Peter John; Azevedo,Ricardo Antunes.
Lysine, threonine, methionine and isoleucine are synthesized from aspartate in a branched pathway in higher plants. Aspartate kinase plays a key role in the control of the aspartate pathway. The enzyme is very sensitive to manipulation and storage and the hydroxamate assay normally used to determine aspartate kinase activity has to be altered according to the plant species and tissue to be analyzed. We have optimized the assay for the determination of aspartate kinase in maize plants callus cell cultures. Among all the assay parameters tested, the concentration of ATP/Mg and temperature were critical for enzyme activity. In the case of temperature, 35°C was shown to be the optimum temperature for aspartate kinase activity.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Aspartate pathway; Maize; Lysine; Threonine; Methionine.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000200015

DETERMINATION OF FAECES PARTICLE PROPORTIONS AS A TOOL FOR THE EVALUATION OF THE INFLUENCE OF FEEDING STRATEGIES ON FIBRE DIGESTION IN DAIRY COWS
Provedor de dados: 21
Autores: Leiber, F.; Ivemeyer, S.; Perler, E.; Krenmayr, I.; Mayer, P.; Walkenhorst, M.
Aim of this study was to test the influence of feeding strategy on faecal particle size distribution as indicator of fibre digestion under on-farm conditions. Seventy-six cows from 11 farms, located in Switzerland and southern Germany were included. Cows were monitored up to eight times during one full lactation. All valid individual test days resulted in a total of 347 datasets. Milk yield and composition were recorded. Diet composition was described in a binary yes/noindication for the presence or non-presence of different roughage components (fresh grass, grass silage, hay, maize silage and straw) and the exact amount of concentrates. Faecal samples were taken at each test day and sieved with a set of four wire‐mesh screens with pore sizes of 4mm, 2mm,...
Tipo: Journal paper
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2015
URL: http://orgprints.org/28217/1/Leiber-etal-2015-JAPS-Vol25-1-p153-159.pdf

Determination of some physical and mechanical properties of soybean and maize in relation to planter design
Provedor de dados: 111
Autores: Soyoye, Babatunde Oluwamayokun; Ademosun, Olugboyega Cornelius; Agbetoye, Leo A. S.
Maize and soybeans are agricultural materials that serve as food to both man and livestock and also serve as by-product used in manufacturing industries. The knowledge of some physical and mechanical properties of these seeds is important tool for designing agricultural machines and equipment for planting, harvesting, processing, packaging and storage. Some of the properties determined include size, geometric mean diameter, surface area, bulk volume, bulk density, true density, porosity, sphericity, angle of repose, coefficient of friction, rupture force and rupture energy. The mean values measured and recorded for the length, width, thickness, geometric mean diameter, surface area, bulk volume, bulk density, true density, porosity and sphericity of maize...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agrultural and Environmental Engineering; Farm Power and Machinery Maize  soybean  physical properties  mechanical properties  planting equipment.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4349

Determination of spatiotemporal stability of corn head smut(Sporisorium reilianum) by SADIE
Provedor de dados: 118
Autores: Ramírez-Dávila,José F; Sánchez-Pale,Jesús R; Porcayo-Camargo,Elvia; de León,Carlos.
Recently, S. reilianum has caused significant ecological and economic damage in the maize-producing areas of Mexico and other countries. Knowledge about the spatiotemporal stability and distribution of the disease is important for the development of integrated management programs. The present study was performed to model the spatial distribution of S. reilianum from 2006 to 2009 using geostatistic techniques and to determine the spatiotemporal stability of corn head smut via a spatial analysis by distance indices (SADIE) and the Cramer-von Mises test. The incidence of the disease was determined in 100 corn parcels located in Santa Magdalena Valle de Bravo Municipality, and the parcel locations were determined with dGPS. The spatial distribution analysis...
Tipo: Journal article
Palavras-chave: Geostatistics; SADIE; Spatial distribution; Spatiotemporal stability; Sphacelotheca; Zea mays.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300006

Determination of the critical period of weed control in corn using a thermal basis
Provedor de dados: 86
Autores: Bedmar,Francisco; Manetti,Pablo; Monterubbianesi,Gloria.
Field studies were conducted over 3 years in southeast Buenos Aires, Argentina, to determine the critical period of weed control in maize (Zea mays L.). The treatments consisted of two different periods of weed interference, a critical weed-free period, and a critical time of weed removal. The Gompertz and logistic equations were fitted to relative yields representing the critical weed-free and the critical time of weed removal, respectively. Accumulated thermal units were used to describe each period of weed-free or weed removal. The critical weed-free period and the critical time of weed removal ranged from 222 to 416 and 128 to 261 accumulated thermal units respectively, to prevent yield losses of 2.5%. Weed biomass proved to be inverse to the crop...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Weed interference; Weed management; Accumulated thermal units; Nonlinear regression.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000200006

Determination of toxicity of insecticides against corn thrips, Frankliniella williamsi Hood.
Provedor de dados: 106
Autores: Sawarng Charoenying; Mallica Kaewwises; Tawil Nilpayak.
1 table
Palavras-chave: Corn; Maize; Thrips; Insecticides; Frankliniella williamsi; Toxicity; ข้าวโพด; เพลี้ยไฟ; สารเคมีฆ่าแมลง; ความเป็นพิษ.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4307

Determining smallholder farmers’ preferences for Push-Pull technology dissemination pathways in western Kenya
Provedor de dados: 31
Autores: Murage,   Alice W.; Amudavi,   David Mulama; Obare,   Gideon A.; Chianu,   Jonas; Khan,   Zeyaur R.
The push-pull technology (PPT) has widely been disseminated to control stemborer (Chilo partellus and Busseola fusca) and Striga weeds (Striga hermonthica and Striga asiatica) in maize fields in Kenya. This study examined farmers’ preferences for various dissemination pathways in order to proffer better targeting of resources in an optimal dissemination strategy. The pathways considered were public meetings (barazas), radio, farmer field schools (FFS), field days (FD), farmer teachers (FT), the fellow farmers (FF) and print materials. Using a weighted score index and ordered probit regression, the different pathways were sequentially ranked as FD, FT, FFS, FF, print materials, Radio, and barazas. Marginal effects from ordered probit showed that farmers had...
Tipo: Journal Article
Palavras-chave: Push-pull technology; Stemborer; Striga; Dissemination pathways; Preference; Research and Development/Tech Change/Emerging Technologies.
Ano: 2010
URL: http://purl.umn.edu/95918

Deutschland – Energie-Corn-Belt Europas?
Provedor de dados: 31
Autores: Gomann,   Horst; Kreins,   Peter; Breuer,   Thomas.
The amendment of the Renewable Energy Sources Act (EEG) in 2004 has established an attractive support of using renewable resources for energy production, which since then has fuelled a rapid expansion of the competitive cropping of energy maize. The regionalised agricultural sector model RAUMIS was applied to calculate expected energy maize production as well as impacts on agricultural land use, production and income. Accordingly, the energy maize acreage rises up to about 1.8 mill hectares in the long run leading to substantial land use changes. The produced energy maize for biogas and power generation respectively is sufficient to provide circa 9% of the current German total electricity generation. In regard to the costs for the current consumer which...
Tipo: Journal Article
Palavras-chave: Renewable Energy Sources Act; Biomass; Energy maize; Agricultural sector model; Land-use; Resource /Energy Economics and Policy; Land Economics/Use.
Ano: 2007
URL: http://purl.umn.edu/96751

Developing an on-farm testing program for Thailand
Provedor de dados: 106
Autores: Izuno, Takumi.
Palavras-chave: Corn; Maize; Sorghum; On farm testing; Variety trials; Weed control; Fertilizers; Plant density; Land preparation trial; Extension service; Adaptive research; Verification trials; Thailand; ข้าวโพด; ข้าวฟ่าง; การทดสอบในไร่นาเกษตรกร; การวิจัยเพื่อการปรับใช้; การทดสอบพันธุ์แบบหลายปัจจัย; การตลาด; ผลผลิต; คุณภาพ.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3849

Development and Evaluation of a Fish Feed Mixer
Provedor de dados: 111
Autores: ADEBUKOLA, ADENIGBA ADEMOLA.
Abstract A Fish feed mixing machine was designed, developed and the effect of speed and retention time on the performance of the mixer was evaluated. The mixing system was tested using three fish feed ingredients; bone meal, groundnut cake and maize grain which was purchased from the market in Akure, Ondo State, Nigeria. The moisture content of the bought ingredients was determined to be 13.1%, 14.7% and 17.5% moisture content dry basis respectively. The mixer was tested using a feed component of three equal measures of 10 kg of ground corn (maize), milled groundnut cake and bone meal which were initially retained on 2 mm, 850 µm and 150 µm sieve respectively. The experiment was replicated thrice at four retention time (5 min, 10 min, 15 min and 20 min)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agriculture; Agric engineering; Post-harvest engineering; Groundnut; Dehulling; Fish feed; Feed production; Performance evaluation; Design of a mixer; Effect of speed on feed mixing; Retention time; Degree of mixing; Coefficient of variation; Feed mixer Bone Meal; Groundnut Cake; Ground Corn; Mixing Machine; Degree of Mixing; Coefficient of Variation.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5420

Development and evaluation of four-wheel tractor-attached multi-crop planter for mechanized seeding of maize in the Philippines
Provedor de dados: 111
Autores: PASCUAL, KRISTINE Samoy; Rafael, Marvelin L; Remocal, Alaissa T; Regalado, Manuel Jose C.
The use of a multi-crop planter (MCP) attached to a compact 4-wheel tractor (4WT) is still not yet fully explored in the Philippines, despite the popularity of 4WT for land preparation in maize areas. A 4WT-attached MCP was developed for row seeding of rice, maize, and mungbean. This study evaluates the MCP adaptive model for maize in a field experiment and on-farm trials at two farmers’ fields during dry season. The MCP with seed metering plate having seven 12-mm diameter holes and 3-mm thickness had a seeding rate of 18.9 kg/ha which is within the targeted design range (15–20 kg/ha), a field capacity of 0.14 ha/h and field efficiency at 78%  in well-tilled-clay soil under controlled condition. In farmer’s fields, the MCP delivered seeding rates within...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Custom-hiring; Field efficiency; Labor productivity; Maize; Multi-crop planter; Seeding rate.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6811

Development and performance evaluation of manual/bullock operated multicrop planter for hilly region
Provedor de dados: 111
Autores: Singh, Sukhbir; Sahoo, D. C.; Bisht, J. K.
In hills, sowing of various crops is generally performed manually by broadcasting of seeds, and that not only consume higher seed rate but also cause uneven distribution of seed at improper depth and moisture, poor germination, unhealthy plants and ultimately lower the yield.  To overcome these problems, a single row manual/bullock multicrop planter was designed and developed for line sowing of wheat, maize, soybean, lentil, pea, mustard, millet etc. for hilly small fields.  The power and pull requirements were 74.6 W and 12 kgf, respectively.  The machine has a nylon made cell type seed metering mechanism with 4 types of cells of different sizes on a roller, and also has a fluted roller for fertilizer metering.  Shovel type and Inverted T-type furrow...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Multicrop planter; Line sowing; Broadcasting; Hills.
Ano: 2017
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3696

DEVELOPMENT AND QUALITY OF SWEET MAIZE INOCULATED WITH DIAZOTROPHIC BACTERIA AND TREATED THIAMINE
Provedor de dados: 196
Autores: Vendruscolo, Eduardo Pradi; Siqueira, Ana Paula Silva; Furtado, João Paulo Marques; Campos, Luiz Fernandes Cardoso; Seleguini, Alexsander.
The insertion of technologies that help to maintain or increase the productivity and quality of agricultural products is highly important in the face of the challenges for the generation of more sustainable farming systems. Thus, the objective of this work was to evaluate the biometric and post-harvest characteristics of sweet maize under inoculation with Azospirillum brasilense and different doses of thiamine applied by seed treatment. The experiment was conducted in a factorial scheme (2 x 4) and the composition of the treatments was the combination of the presence or absence of the Azospirillum brasilense and different doses of thiamine (0, 15, 30 and 45 mg kg-1). Were evaluated the grain yield, ear weight with and without the straw, straw weight, straw...
Tipo: Info:eu-repo/semantics/article
Ano: 2018
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/2766

Development of a Brazilian maize core collection
Provedor de dados: 74
Autores: Coimbra,Ronaldo R.; Miranda,Glauco V.; Cruz,Cosme D.; Silva,Derly J.H.; Vilela,Ramiro A.
The aim of this study was to evaluate methods for developing a Brazilian maize core collection. For an initial survey of the active collection, passport information, as well as characterization and evaluation of accessions, were taken into consideration, these then being divided according to geographic region and kernel-type. Multiple sampling methods were evaluated. The strategy of constant sampling generated extensive alterations in extract accession frequency. The multivariate strategy with dispersion graphs and principal components associated with the Tocher method was considered efficient for identifying the most divergent genotypes. The multivariate strategy generated greater alterations in the variance of traits. The average number of traits...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germplasm collection; Zea mays; Breeding; Landraces; Selection.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000300017

Development of a Manually Operated Vertical Seed-Plate Maize Planter
Provedor de dados: 111
Autores: Soyoye, Babatunde Oluwamayokun; Ademosun, Olugboyega Cornelius; Olu-Ojo, Emmanuel Odunayo.
Maize has been of great importance in providing food for man, feed for livestock and raw materials for some agro-based industries. It constitutes a stable food in many regions of the world. Studies in maize production in different parts of Nigeria have shown an increasing importance of the crop amidst growing utilization by food processing industries and livestock feed mills. A manually operated vertical seed-plate maize planter was designed, fabricated and tested. The research was aimed at developing a planting machine that is simple in operation, easy to maintain and affordable by peasant farmers. Design criteria, calculations and analysis of various components of the machine were critically considered and determined in the cause of the development. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural and Environmental Engineering; Farm Power and Machinery option; Machine Design Maize  planter  laboratory evaluation  field test.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3938

Development of a photovoltaic driven ventilation system to modified traditional Ethiopian gombisa for on-cobs-maize drying
Provedor de dados: 111
Autores: Garbaba, Chemeda Abedeta.
Mycotoxin-producing fungal growth commonly reported from traditional maize storage system in southwestern Ethiopia. Un-safe moisture content at loading and non-climatically controlled nature of gombisa results in mycoflora growth and development on maize in storage system. Therefore, this paper was aimed to develop a photovoltaic driven ventilation system fitted to modified gomibsa for natural air in-bin drying of on-cobs-maize and increase the shelf life of the product. Modified gombisa was constructed from locally available materials for the current experiment. An appropriate fan type and size, humidistat set at &gt;70% and two 20 Wp photovoltaic panels were used for ventilation purpose, fan control and power the fan, respectively. In total 1.76 m3 of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Modified gombisa; Maize in cobs; Temperature; Relative humidity; Ventilation system.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4850

Development of deficit irrigation for maize crop under drip irrigation in samaru-nigeria
Provedor de dados: 111
Autores: Ezekiel, Oiganji.
In the past, outcome of any water management strategy could only be known after field experiment, in recent times, means of evaluating the implications of irrigation schedules without field experiment is fast gaining grounds with the use of models.  This research work present a scenarios studies for different developed irrigation scheduling options for a drip irrigated maize crop at the Institute for Agricultural Research (IAR) irrigation farm Samaru-Nigeria during 2013 and 2014 cropping season using a computer-based model.  Aqua Crop was calibrated and validated with data obtained from the field, it was further used to generate scenario of different irrigation scheduling outcome. Grain and biomass yields, harvest index, seasonal evapotranspiration and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering/ soil and water conservation engineering Aqua Crop model; Calibration; Validation; Irrigation schedulling; Water productivity.
Ano: 2017
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3752

Development of experimental structure and influence of high CO2 concentration in maize cro
Provedor de dados: 70
Autores: Silva,João B. Lopes da; Ferreira,Paulo A.; Pereira,Eduardo G.; Costa,Luís C.; Miranda,Glauco V.
Maize is a C4 plant that shows few or no response to high [CO2]. Thus, this study aimed to analyze the photosynthetic rate and yield of maize under high [CO2] and develop open-top chambers (OTC) to create an atmosphere enriched with CO2. The experiment was conducted between October 2008 and March 2009. The OTCs were developed in modular scheme. Measurement of photosynthetic rates, transpiration, stomata conductance, grain yield and dry matter were performed. The experimental design was randomized blocks with four replications and three treatments: P1 - plants grown in OTC with 700 ppm [CO2], P2 - plants grown in OTC with environmental [CO2], and P3 - control, cultivated in open field. The results were analyzed by ANOVA and Tukey's test (Pr&lt; 0.05). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Open-top chambers; Climate change; Zea mays L.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000200010

Development of four downy mildew resistance and high aluminum acid soils-DMR  maize populations with desirable agronomic characters
Provedor de dados: 106
Autores: Leon, C. De; Granados, G.; Read, M.D.
Palavras-chave: Corn; Maize; Downy mildew; High aluminum acid soil; Maize population; ข้าวโพด; การปรับปรุงพันธุ์; โรคราน้ำค้าง; ดินกรด; ประชากร; ลักษณะทางการเกษตร.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4278

Development of GCP Ontology for Sharing Crop Information
Provedor de dados: 17
Autores: Rosemary Shrestha; Ramil Mauleon; Reinhard Simon; Jayashree  Balaji; Stephanie  Channeli&amp;#xe8;re; Adriana  Alercia; Martin Senger; Kevin Manansala; Thomas Metz; Guy  Davenport; Richard Bruskiewich; Graham McLaren; Elizabeth Arnaud.
The Generation Challenge Programme (GCP &amp;#x2013; &amp;#x22;http://www.generationcp.org&amp;#x22;:http://www.generationcp.org) is a globally distributed crop research consortium directed toward crop improvement through the application of comparative biology and genetic resources characterization to plant breeding. GCP adopted the development paradigm of a &amp;#x2018;model-driven architecture&amp;#x2019; to achieve the interoperability and integration of diverse GCP data types that are available through distributed data sources and consumed by end-user data analysis tools. Its objective is to ensure semantic compatibility across the Consortium that will lead to the creation of robust global public goods from GCP research results....
Tipo: Poster
Palavras-chave: Bioinformatics; Plant Biology.
Ano: 2009
URL: http://precedings.nature.com/documents/3087/version/1

Development of genetic models to breed for mixed cropping systems
Provedor de dados: 21
Autores: Haug, Benedikt; Messmer, Monika; Forst, Emma; Mary-Huard, Tristan; Enjalbert, Jérôme; Goldringer, Isabelle; Hohmann, Pierre.
Introduction  Mixed cropping, i.e. mixing different crops in the same field, provides agronomic advantages as increased productivity under low inputs conditions (e.g. for organic farming: Bedoussac et al. 2015) and higher yield stability (Raseduzzaman and Jensen 2017). In mixed cropping, choosing the right cultivars is critical for the performance of the mixture, as shown for pea-barley mixtures (Hauggaard-Nielsen and Jensen 2001) and maize-bean mixtures (Hoppe 2016). As performance in pure stand can strongly diverge from performance in mixture, estimating the ability of a cultivar to be mixed with another crop is therefore of utmost importance. For this purpose, concepts of General and Specific Combining Ability in hybrid breeding (Griffing 1956) have...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Breeding; Genetics and propagation.
Ano: 2019
URL: http://orgprints.org/36778/1/haug-etal-2019-book-of-abstracts-eccd-p242-243.pdf

Development of maize and palisadegrass plants cultivated in intercrop under water deficit
Provedor de dados: 96
Autores: Araujo,Leandro Coelho de; Santos,Patrícia Menezes; Mendonça,Fernando Campos; Lima,Nino Rodrigo Cabral de Barros.
The objective of this work was to evaluate the development and productive traits of palisadegrass single cultivated or intercropped with corn, in addition to corn intercropped with pasture, under water deficit at different development stages of the plants. It was used a complete block experimental design with split plots and three replicates. Periods of water deficit were placed in the plots and types of cultivation were placed in the subplots. Irrigation was stopped at germination and initial tillering of palisadegrass and at V4 and V15 stages of corn and returned when soil moisture was 40% of available water capacity. Tiller density and palisadegrass height were evaluated weekly. Dry matter (DM) of fractions of herbage mass as well as leaf area of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Integration; Tiller; Zea mays.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700001

Development of maize products
Provedor de dados: 106
Autores: Paichit Chandrawong.
Palavras-chave: Corn; Maize; Corn products; Corn flakes; Corn grits; Corn meal; Corn flour; Food processing; ข้าวโพด; ผลิตภัณฑ์ข้าวโพด; กระบวนการผลิต; วิธีการ.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3988

Development of raw material preparation method and simple equipment for corn chip production
Provedor de dados: 106
Autores: Somyos Chanyavilas; Rasamee Supasri; Sukoncheun Sringam.
Palavras-chave: Corn; Maize; Corn chip; Production; ข้าวโพด; แป้งข้าวโพด; คอร์นชิฟ.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4270

Development of supersweet corn F1 hybrids and composites
Provedor de dados: 106
Autores: Tavat Lavapauraya; Chantravipha Dhanasobhon; Prachum Jutawantana; Kosol Chaimanee.
7 tables
Palavras-chave: Corn; Maize; Super sweet corn; F1 hybrids; Composites; Plant breeding; Varieties; Yields; ข้าวโพด; ข้าวโพดหวานพิเศษ; ข้าวโพดลูกผสม; ข้าวโพดพันธุ์ผสมเปิด; การปรับปรุงพันธุ์.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3956

Development of sweet corn single cross hybrid variety : CMS 1540
Provedor de dados: 106
Autores: Prawit Puddhanon; Sakol Petchmanee; Suvit Punsurintr; Jinda Jan-orn.
6 tables
Palavras-chave: Corn; Maize; Sweet corn; Single cross hybrid; CMS 1540; ข้าวโพด; ข้าวโพดหวาน; ลูกผสมเดี่ยว.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4498

Development of transformation vectors for the production of potentially high oleate transgenic oil palm
Provedor de dados: 69
Autores: Masani,Mat Yunus Abdul; Parveez,Ghulam Kadir Ahmad.
The main target of Malaysian Palm Oil Board (MPOB) genetic engineering programme is to produce high oleate transgenic palms. The availability of effective transformation vector is one of the pre-requisites for genetic manipulation of oil palm through recombinant DNA technology. Here, we describe the construction of a series of transformation vectors that have a maize ubiquitin promoter (UbiPro)-driven bar gene for selection of transformants on herbicide (Basta or Bialaphos), and mesocarp-specific promoter (MSP1) for expression of the transgenes [antisense palmitoyl-ACP-thioesterase (PAT) and sense &amp;#946;-ketoacyl-ACP-synthase II (KASII) and sense &amp;#916;9-stearoyl-ACP-desaturase (SAD)] potentially responsible for high oleate content in oil palm...
Tipo: Journal article
Palavras-chave: Oleate; Transformation vectors; Transgenic oil palm.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000300003

Development options for local seed systems in Mozambique
Provedor de dados: 30
Autores: Rohrbach, D.
Palavras-chave: Pigeonpeas; Retail marketing; Millets; Cowpeas; Sorghum; Grain; Seed quality; Weather hazards; Groundnuts; Maize.
Ano: 2000
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3319

Diagnóstico participativo de agroecossistemas na área de produção coletiva do assentamento Cunha em Cidade Ocidental, GO: agrobiodiversidade e práticas agroecológicas.
Provedor de dados: 14
Autores: MACHADO, C. T. de T.; MACHADO, A. T.; JOSÉ JÚNIOR, G.
RESUMO: O objetivo deste trabalho foi caracterizar, de forma participativa, o agroecossistema local da área do grupo coletivo Carajás do Assentamento Cunha, em Cidade Ocidental, GO, considerando aspectos relacionados à agrobiodiversidade e práticas agroecológicas, características ambientais, socioculturais, econômicas e organizacionais. As atividades produtivas são diversificadas e o grupo coletivo planta culturas anuais, hortaliças, frutas, além de criar gado de leite, galinhas e abelhas. A produção é destinada ao consumo das famílias e o excedente é comercializado. Espécies nativas são encontradas na área, mas não ocorre atividade extrativa. O manejo dado aos sistemas produtivos é considerado como em transição para sistema agroecológico, a partir da...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Agroecologia; Rural settlement.; Agricultura Familiar; Assentamento; Biodiversidade; Cerrado; Ecologia Vegetal; Planejamento Participativo.; Family farms; Plant ecology.; Planning.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/572285

Diallel analysis of maize hybrids for agronomic and bromatological forage traits
Provedor de dados: 1
Autores: Mendes, Matheus Henrique Silveira; Pereira, Carlos Henrique; Souza, João Cândido de.
The aim of this study was to evaluate a diallel of maize hybrids for traits related to forage production and nutritional value. Six commercial hybrids were used as parents. The crosses were made according to a complete diallel design, obtaining the F1 and reciprocal crosses. The evaluations were performed in the main and second crop seasons in the 2010/2011 crop year at the Center for Technological Development in Agriculture of the Federal University of Lavras, located in Lavras, Minas Gerais State, Brazil. The experimental precision indicated by the coefficient of variation was good for all the traits measured. Significant differences were not observed among the crosses for traits related to the nutritional value of the forage. For fresh matter yield and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mating designs; General combining ability; Specific combining ability; Interaction genotypes x environments.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19329

Diallel analysis of maize resistance to Phaeosphaeria maydis
Provedor de dados: 63
Autores: Silva,Herberte Pereira da; Moro,José Roberto.
In breeding programs directed towards genetic resistance against diseases, the estimation of genetic parameters that control resistance allows the introduction of resistance into suscetible germplasm to be clearly focused. The purposes of this study were to estimate heterosis effects, and the general (GCA) and specific (SCA) combining abilities by using two rating methods for resistance to Phaeosphaeria maydis in a diallel analysis of 36 F1 maize hybrids and their nine inbred lines. Trials were conducted in three environments. Disease severity was evaluated in the whole plant (PI) and in the leaf positioned just below the point of insertion of the main ear (AFA). The trials followed a randomized block design with plots represented by a 5 m long rows....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Genetic resistance; Heterotic effects; General and specific combining ability.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100007

Diallel cross among eight Thai supersweet composite 1 DMR inbreds
Provedor de dados: 106
Autores: Chokechai Aekatasanawan; Sansern Jampatong; Chamaiporn Aekatasanawan; Noppong Chulchoho.
6 tables
Palavras-chave: Corn; Maize; Super sweet corn; Inbred line; Diallel cross; Composite variety; ข้าวโพด; ข้าวโพดหวาน; การผสมพันธุ์แบบพบกันหมด; สายพันธุ์แท้; พันธุ์ซูเปอร์สวีทดีเอ็มอาร์.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4495

Diallel cross among ten baby corn inbreds
Provedor de dados: 106
Autores: Chokechai Aekatasanawan; Sansern Jampatong; Chamaiporn Aekatasanawan; Noppong Chulchoho.
4 tables
Palavras-chave: Corn; Maize; Baby corn; Inbred line; Diallel cross; ข้าวโพด; ข้าวโพดฝักอ่อน; การผสมพันธุ์แบบพบกันหมด; สายพันธุ์แท้.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4496

Diallel cross analysis for young plants of brachytic maize (Zea mays L.) varieties
Provedor de dados: 54
Autores: Dantas,Ana C. Vello; Miranda Filho,José B.; Alleoni,Maria R.B.
Six brachytic maize varieties were crossed in a diallel mating scheme. Both varieties and crosses were grown hydroponically in a greenhouse, in randomized complete blocks with three replications in two seasons. Four brachytic double cross hybrids were used as checks. Twenty-eight days after planting, data for eight traits were taken for weights of the total plant (TPW), top plant (TOW), total roots (TRW), seminal roots (SRW), and nodal roots (NRW) and number of total roots (TRN), seminal roots (SRN), and nodal roots (NRN). Ten plants were measured in each plot and all the analyses were accomplished with plot means. In the diallel cross the top plant contributed 57.6% of the total plant weight, for seminal roots 15.4%, and for nodal roots 27.0%. Root number...
Tipo: Info:eu-repo/semantics/article
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000300016

Diallel crosses among maize lines with emphasis on resistance to foliar diseases
Provedor de dados: 74
Autores: Paterniani,Maria Elisa Ayres Guidetti Zagatto; Sawazaki,Eduardo; Dudienas,Christina; Duarte,Aildson Pereira; Gallo,Paulo Boller.
Ten elite maize (Zea mays L.) lines were crossed in a complete diallel scheme and the single-cross hybrids obtained were assessed at four experimental stations of the Agronomic Institute of Campinas, in São Paulo State, Brazil. The experiments were set up in a randomized complete block design with three replications, including four commercial checks. The experimental plots consisted of two 5-m rows spaced at 0.9 m, with a total of 50 plants. The traits assessed included: days to mid-tassel pollen shed (DPS), plant height (PH), ear height (EH), grain yield, corrected for a 50-plant stand and 14% moisture (GY corr.), and resistance to Phaeosphaeria maydis and Puccinia polysora. General and specific combining ability effects (GCA and SCA) were determined....
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000200024

Diallel crossing among maize populations for resistance to fall armyworm
Provedor de dados: 63
Autores: Alvarez,María del Pilar; Miranda Filho,José Branco de.
Among the insects infecting the maize (Zea mays L.) crop in Brazil, the fall armyworm (Spodoptera frugiperda Smith, 1797, Lepdoptera: Noctuidae) is considered one of the most important because it causes the highest damage to yield. Genetic resistance to the fall armyworm has be an effective control strategy. The main objective of this work was to evaluate new germplasm sources for resistance to the fall armyworm, the key pest for the maize crop in Brazil. A partial diallel design between 20 varieties of Brazilian germplasm and nine exotic and semi-exotic varieties of different origin was used. The 180 crosses and 29 parental varieties along with two commercial checks were evaluated in three locations in the State of São Paulo State (Brasil). Fall armyworm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic resistance; Partial diallel; Germplasm.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400017

Diallelic analysis for lysine and oil contents in maize grains
Provedor de dados: 63
Autores: Medici,Leonardo Oliveira; Gaziola,Salete Aparecida; Varisi,Vanderlei Aparecido; Paula,José Antonio Carmezini de; Ferreira,Renato Rodrigues; Azevedo,Ricardo Antunes.
Six S5 lines of maize, with differences for lysine and oil contents in grains, were used to carry out a complete series of diallelic crosses. The resulting 15 hybrids were grown in a field at two nitrogen levels (10 and 130 kg N ha-1). The general combining ability (GCA) and specific combining ability (SCA) were obtained by using the method 4, model I of Griffing for grain yield, and grain lysine and oil contents. Significant (p &lt; 0.001) interaction was observed between GCA and N levels for grain yield, indicating the selection of different lines for each N level. This interaction was not significant for lysine content, but there were significant effects of GCA for this trait at both N levels (p &lt; 0.1). Significant effects were not observed for GCA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cereal; Opaque; Nitrogen; Proteins; Near infrared.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200009

Did the Economic Conditions for Bt-maize in the EU Improve from 1995 to 2004? A MISTICs Perspective.
Provedor de dados: 31
Autores: Scatasta,   Sara; Wesseler,   Justus; Demont,   Matty.
The debate about the "quasi" moratorium on the release of GMOs in the European Union is on going. One of the major arguments that were put forward to delay the release of new traits was the one for more information. In this contribution we compare the situation for Bt-maize from the 1995 and 2004 perspective. The 2004 perspective differentiate between two scenarios: one without the CAP reform and one including the CAP reform. For the comparison we use an ex-ante assessment model based on real option theory that explicitly considers the irreversible costs and benefits of the technology. As empirical information about possible irreversible costs is scarce we identify the maximum incremental social tolerable irreversible costs, MISTICs, for Bt-maize, a...
Tipo: Conference Paper or Presentation
Palavras-chave: Bt-maize; Irreversibility; Real options; Uncertainty; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/25245

Die gute alte Fruchtfolge als Bekämpfungsmethode gegen den  Maiswurzelbohrer (Diabrotica virgifera virgifera LeConte)
Provedor de dados: 21
Autores: Bertossa, M.; Schaub, L.; Colombi, L.
Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae), the western corn rootworm  (WCR), is an immigrant from North America and one of the top ten global agricultural  pest species. Within the last 15 years, WCR invaded Europe at 3 focal points, and has  been steadily extending its domain soon threatening commercial maize production.  After the first detection in Switzerland in 2000 near Lugano, careful observations by  pheromone trap monitoring of this quarantine organism have been realized.  Experiences with WCR whose populations dynamics are incompletely understood,  have also been studied by installing a continuous maize field comparing population  dynamics with rotated maize fields in the immediate surroundings. Our experiences  with WCR...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection.
Ano: 2009
URL: http://orgprints.org/14414/1/Bertossa_14414.pdf

Die Kosten der Koexistenz von gentechnisch veränderten und  biologischen Kulturen: Fallbeispiele aus Frankreich und der  Grenzregion
Provedor de dados: 21
Autores: Oehen, Bernadette; Stolze, Dr. Mathias.
Coexistence issues have been to a large extent focused on technical measures to  avoid the adventitious presence of gm material in non-gm crops. Information about  costs involved in growing GM, conventional and/or organic crops in the same agricultural  system are not available. In this case study, we investigated the coexistence  costs of gm and non-gm grain maize for the gm maize and the non-gm maize producer.  From our simulation results we can conclude that the benefits of gm maize production  can only cover the potential coexistence and management costs in cases of i)  small discard zone distances and ii) in cases with high gm maize adoption rates of  90%.
Tipo: Conference paper, poster, etc.
Palavras-chave: Policy environments and social economy.
Ano: 2009
URL: http://orgprints.org/14501/1/Oehen_14501.pdf

Differences in intracellular localization of corn stunt spiroplasmas in magnesium treated maize
Provedor de dados: 47
Autores: Nome,Claudia; Magalhães,Paulo César; Oliveira,Elizabeth; Nome,Sergio; Laguna,Irma Graciela.
Maize plants infected with Spiroplasma kunkelii show symptoms similar to that of plants in a magnesium-deficient soil, and it has been shown that the spiroplasma alters the plants' magnesium absorption. In the current study we compared changes associated to either spiroplasma infection, two soil magnesium levels and their combinations. Plant symptoms were recorded and correlated with transmission electron microscopy observations. Plants grown on a high magnesium treatment showed no macroscopical alterations nor organelle ultrastructural alterations, while plants on a low magnesium treatment showed macroscopical vein yellowing and, ultrastructurally, they had most chloroplasts and mitochondrial membranes altered. Infected plants on a low magnesium treatment...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Mollicutes; Cytopathology; Plant pathogen; Magnesium deficiency.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452009000200008

Differential detection of transposable elements between Saccharum species
Provedor de dados: 74
Autores: Souza,Marislane Carvalho Paz de; Silva,Jéssica Naiana; Almeida,Cícero.
Cultivars of sugarcane (Saccharum) are hybrids between species S. officinarum (x = 10, 2n = 8x = 80) and S. spontaneum (x=8,2n=5-16x =40-128). These accessions have 100 to 130 chromosomes, 80-85% of which are derived from S. officinarum, 10-15% from S. spontaneum, and 5-10% are possible recombinants between the two genomes. The aim of this study was to analyze the repetition of DNA sequences in S. officinarum and S. spontaneum. For this purpose, genomic DNA from S. officinarum was digested with restriction enzymes and the fragments cloned. Sixty-eight fragments, approximately 500 bp, were cloned, sequenced and had their identity analyzed in NCBI, and in the rice, maize, and sorghum genome databases using BLAST. Twelve clones containing partial transposable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sugarcane; Dot-blot hybridization; LTR retrotransposons; Repetitive DNA.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300016

Differentiation of organically and conventionally produced  milk by stable isotope and fatty acid analysis
Provedor de dados: 21
Autores: Molkentin, Joachim; Giesemann, Anette.
Increasing sales of organic milk mean intensified tests for authenticity are required. In addition to comprehensive documentation, analytical methods to identify organic milk, and thus to differentiate it from conventional milk, are needed for consumer protection. Because the composition of milk is fundamentally dependent on the feeding of the cows, thirty-five samples from both production systems in Germany, including farm and retail milk, were collected within 12 months, to reflect seasonal variation, and appropriate properties were analysed. Fatty acid analysis enabled organic and conventional milk to be completely distinguished, because of the higher α-linolenic acid (C18:3ω3) and eicosapentaenoic acid (C20:5ω3) content of the former. Organic milk fat...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health Consumer issues.
Ano: 2007
URL: http://orgprints.org/17235/1/Molkentin_ABC_388_(2007)_297%2D305.pdf

Diffusion and sorption of allyl isothiocyanate in the process of fumigation of maize
Provedor de dados: 91
Autores: Paes,Juliana L.; Faroni,Lêda R. A.; Martins,Marcio A.; Dhingra,Onkar D.; Silva,Tales A.
The purpose of this work was to evaluate the transport of allyl isothiocyanate (AITC) by means of the sorption mechanism and the diffusion of AITC through maize grains. The experimental procedure to study the sorption mechanism was conducted by injection of AITC in glass flasks containing the grains. Kinetic models of zero, first and second order were fitted to AITC concentration data, with the purpose of determining the sorption rate (k). For the study of diffusion, a prototype was utilized in which the components are a gas chamber and a cylindrical column in which the grains were stored. At the interval of 110 min, samples in the chamber and in the column were collected, which were immediately injected into the gas chromatograph. In order to determine...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fumigant; Effective diffusion coefficient; Sorption rate.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662011000300011

Digestibilidad in vitro de carbohidratos en la langosta espinosa Panulirus  argus (Latreille, 1804)
Provedor de dados: 20
Autores: Casuso, A.; Rodríguez-Viera, L.; Perera, E.
El conocimiento de las capacidades digestivas de determinada especie es un aspecto clave para el establecimiento de dietas y  estrategias de alimentación en cautiverio. Los carbohidratos son un macronutriente importante en la dieta y además, desde el  punto de vista acuícola, son una fuente de energía barata. Sin embargo, existe un desconocimiento total de la digestión de  carbohidratos en la langosta espinosa Panulirus argus. En el presente trabajo se evaluó la digestión  in vitro  de diferentes  fuentes de carbohidratos por las enzimas digestivas de P. argus. El almidón de arroz y los almidones gelatinizados de papa y  de maíz fueron los sustratos que presentaron mayores tasas de hidrólisis entre todas las fuentes probadas, seguidos por la  harina de...
Tipo: Journal Contribution
Palavras-chave: Spiny lobster fisheries; Amylases.
Ano: 2013
URL: http://hdl.handle.net/1834/5251

Digestibility of feeds containing sorghum, with and without tannin, for broiler chickens submitted to three room temperatures
Provedor de dados: 89
Autores: Garcia,RG; Mendes,AA; Sartori,JR; Paz,ICLA; Takahashi,SE; Pelícia,K; Komiyama,CM; Quinteiro,RR.
The traditional method of total excreta collection was applied, using 30 to 40 day old male Ross 308 broiler chickens. One hundred and eight broiler chickens were used, randomly assigned to a 3x3 factorial experimental design. The room temperatures were 14 C (cold), 25 °C (thermoneutral) and 32 °C (hot) and the three diets were 100% maize, 100% sorghum with tannin and 100% sorghum without tannin, with four replicates of each. The digestibility coefficients for the dry matter, crude protein, crude fibre, neutral detergent fibre, acid detergent fibre, ether extract, mineral matter and nitrogen-free extract were determined. It was observed that all the digestibility coefficients were higher in the hot chamber and lower in the cold chamber, and that these...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broiler chickens; Digestibility; Sorghum; Tannin.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000100007

Digestible energy of crude glycerol for pacu and silver catfish
Provedor de dados: 65
Autores: Balen,Rafael Ernesto; Tetu,Patrick Nereu; Bombardelli,Robie Allan; Pozza,Paulo Cesar; Meurer,Fábio.
The increase in global biodiesel production is originating a glycerol surplus, which has no defined destination. An alternative to overcome this problem is its use as energy source in animal feeding. In Brazil, Pacu (Piaractus mesopotamicus) is one of the most farmed native fish species, whereas Silver catfish (Rhamdia quelen) is suitable for production in subtropical region. Considering little knowledge about crude glycerol utilization in feeds for Neotropical fish species, it was evaluated the apparent digestibility coefficients (ADCs) for energy of crude glycerol for P. mesopotamicus and R. quelen. The digestibility and digestible energy content of crude glycerol can be considered excellent even when compared to energy of common ingredients such as...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Byproduct; Glycerin; Non-protein energy; Nutrition.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000801448

Dinâmica populacional de plantas daninhas na cultura do milho em função de adubação e manejo.
Provedor de dados: 21
Autores: Corrêa, Maria Lita Padinha; Galvão, João Carlos Cardoso; Fontanetti, Anastácia; Ferreira, Lino Roberto; Miranda, Glauco Vieira.
O objetivo do trabalho foi avaliar o estabelecimento populacional das comunidades das plantas daninhas, durante seis anos agrícolas consecutivos de milho cultivado no sistema plantio direto orgânico e tradicional, intermediado por um sistema de plantio convencional. Os experimentos foram conduzidos nos anos agrícolas 2003/04 até 2008/09. O delineamento experimental adotado foi o de blocos casualizados com quatro repetições. Os tratamentos avaliados foram: SDT1 (semeadura direta sem adubação e com aplicação de herbicidas no manejo das plantas daninhas); SDT2 (semeadura direta com adubação mineral na dose de 300 kg ha-1 do formulado 8-28-16 + 100 kg ha-1 de nitrogênio em cobertura, e com aplicação de herbicidas); SDT3 (semeadura direta, adubação com composto...
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Weed management.
Ano: 2011
URL: http://orgprints.org/20382/1/Corr%C3%AAa_din%C3%A2mica.pdf

Dinámica y ordenamiento de uso de la tierra en el oriente del municipio de Texcoco, Estado de México
Provedor de dados: 32
Autores: Pérez Miranda, Ramiro.
Se presenta una propuesta de ordenamiento de uso de la tierra que integra diferentes  componentes, siendo los más importantes un análisis de cambios de uso y la proyección de los mismos, además de una evaluación física de la tierra. El análisis de cambio de uso de la tierra se apoyó en una interpretación visual de imágenes capturadas en los años 1993 y 2004. Posteriormente, empleando técnicas de análisis multicriterio espacial, cadenas de Markov y autómatas celulares se proyectaron los cambios al año 2014 en un ambiente de SIG. Mediante una adaptación de la metodología de evaluación de tierras propuesta por la FAO se realizó la evaluación física de la misma en el oriente del municipio de Texcoco. Adicionalmente, se desarrolló una metodología para promover...
Palavras-chave: Ordenamiento territorial; Uso de la tierra; Escenarios futuros; Cambios de uso de la tierra; Evaluación física de la tierra Land use planning; Land use; Future scenarios; Land use change; Physical land assessment.
Ano: 2012
URL: http://hdl.handle.net/10521/847

Dinámica y ordenamiento de uso de la tierra en el oriente del municipio de Texcoco, Estado de México
Provedor de dados: 32
Autores: Pérez Miranda, Ramiro.
Se presenta una propuesta de ordenamiento de uso de la tierra que integra diferentes  componentes, siendo los más importantes un análisis de cambios de uso y la proyección de los mismos, además de una evaluación física de la tierra. El análisis de cambio de uso de la tierra se apoyó en una interpretación visual de imágenes capturadas en los años 1993 y 2004. Posteriormente, empleando técnicas de análisis multicriterio espacial, cadenas de Markov y autómatas celulares se proyectaron los cambios al año 2014 en un ambiente de SIG. Mediante una adaptación de la metodología de evaluación de tierras propuesta por la FAO se realizó la evaluación física de la misma en el oriente del municipio de Texcoco. Adicionalmente, se desarrolló una metodología para promover...
Palavras-chave: Ordenamiento territorial; Uso de la tierra; Escenarios futuros; Cambios de uso de la tierra; Evaluación física de la tierra Land use planning; Land use; Future scenarios; Land use change; Physical land assessment.
Ano: 2012
URL: http://hdl.handle.net/10521/920

Dinámica y ordenamiento de uso de la tierra en el oriente del municipio de Texcoco, Estado de México
Provedor de dados: 32
Autores: Pérez Miranda, Ramiro.
Se presenta una propuesta de ordenamiento de uso de la tierra que integra diferentes componentes, siendo los más importantes un análisis de cambios de uso y la proyección de los mismos, además de una evaluación física de la tierra. El análisis de cambio de uso de la tierra se apoyó en una interpretación visual de imágenes capturadas en los años 1993 y 2004. Posteriormente, empleando técnicas de análisis multicriterio espacial, cadenas de Markov y autómatas celulares se proyectaron los cambios al año 2014 en un ambiente de SIG. Mediante una adaptación de la metodología de evaluación de tierras propuesta por la FAO se realizó la evaluación física de la misma en el oriente del municipio de Texcoco. Adicionalmente, se desarrolló una metodología para promover...
Tipo: Tesis
Palavras-chave: Ordenamiento territorial; Uso de la tierra; Escenarios futuros; Cambios de uso de la tierra; Evaluación física de la tierra; Doctorado; Forestal; Land use planning; Land use; Future scenarios; Land use change; Physical land assessment.
Ano: 2008
URL: http://hdl.handle.net/10521/1583

Diplodia macrospora em milho.
Provedor de dados: 14
Autores: FERNANDES, F. T.; OLIVEIRA, E. de.
bitstream/item/53453/1/ct-17.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize; Diplodia macrospora; Disease; Fungus; Control.; Doença; Fungo; Milho; Zea Mays.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484064

Direct Sowing of Maize
Provedor de dados: 21
Autores: Alföldi, Thomas; Böhler, Daniel; Dierauer, Hansueli; Hegglin, Django; Böhler, Josef; Breiter, Hanspeter.
In organic farming, the plough is generally used in maize cultivation because it provides a simple way to control weed.  Unfortunately, regarding soil erosion, compaction and runoff, ploughing is especially harmful in maize cultivation.   Direct sowing of maize could largely solve these problems.   The video presents the technique of direct sowing of maize, for example in a field of rolled field pea.  In the last years, FiBL tests have shown that under optimal conditions, the direct sowing of maize in organic farming is possible without significant yield losses.
Tipo: Practice tool
Palavras-chave: Production systems Cereals; Pulses and oilseeds Weed management.
Ano: 2015
URL: http://orgprints.org/30998/1/video.php_y%3Dhttps_%252F%252Fwww.youtube.com%252Fwatch_v%3DTFxNdCZes60%26index%3D64%26list%3DPL1dOum9RiVPiVw2Acuc7vg9MfPdEtqM1i

Direkt- und Spätsaat von Silomais nach Wintererbsenvorfrucht – Erfahrungen aus Forschung und Praxis
Provedor de dados: 21
Autores: Graß, Rüdiger; Scheffer, Konrad.
Herkömmliche Maisanbausysteme führen häufig zu vielfachen Anbauproblemen und umweltgefährdungen: Nitratauswaschung, Bodenerosion und ein hoher Aufwand für die Unkrautregulierung. Aufgrund dieser Probleme ist der Maisanbau im Ökologischen Landbau nicht stark verbreitet. Zugleich besteht dort ein großer Bedarf an einem energiereichen Grundfutter, so dass der Mais gut in den Ökologischen Landbau passen würde. Viele Strategien zur Lösung dieser Probleme führen oft zu neuen Problemen, sind häufig wirkungslos und meistens mit zusätzlichen Kosten verbunden. Das Zweikulturnutungssystem für Mais vermeidet diese Probleme. Als Erstkultur wird Ende September eine Wintererbse ausgesät. Nach der Ernte als Ganzpflanze Ende Mai wird der Mais im Direktsaatverfahren ohne...
Tipo: Conference paper, poster, etc.
Palavras-chave: Root crops.
Ano: 2003
URL: http://orgprints.org/1231/1/grass%2D2003%2Dspaetsaat%2Dsilomais.pdf

Discovery of witchweed (Striga lutea Lour.), a root parasite of corn in Thailand II. Studies on witchweed control
Provedor de dados: 106
Autores: Maneesa Teerawatsakul; Somchart Kanjanajirawong; Eusupe Chaimanid; Chanpen Prakongvongs; Permsak Supaponhemin.
8 ill.
Palavras-chave: Corn; Maize; Witchweed; Striga lutea; Root parasite; Weed control; ข้าวโพด; วัชพืช; หญ้าแม่มด; สไตรก้า; ปรสิตที่เกาะรากพืช.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3831

Discrimination of maize inbreds for kernel quality traits and fatty acid composition by a multivariate technique - doi: 10.4025/actasciagron.v33i4.11031
Provedor de dados: 1
Autores: Egesel, Cem Ömer; Çanakkale Onsekiz Mart University; Kahrıman, Fatih; Çanakkale Onsekiz Mart University; Gül, Muhammet Kemal; K+S Nitrogen GmbH, Maslak-Şişli.
Quality is considered to be mainly related to protein and oil concentration in maize kernel. Great effort has been made through the elevation of oil and protein concentrations; however, studies to enhance the composition quality of oil have been limited. Maize genotypes with special fatty acid composition may confer different end uses and added value. We investigated eight maize inbreds for kernel quality and fatty acid composition. Kernel samples from a two-year experiment were analyzed for oil, protein, moisture and ash, as well as several fatty acids, including oleic, linoleic, and linolenic acids. Results indicated differences among the genotypes for all traits, except for behenic acid. A680 appeared to be a promising parent to elevate oleic acid,...
Tipo: Field work and laboratory analysis
Palavras-chave: Field Crops Zea mays; Oil; Protein; Multivariate analysis Cereals Field Crops Zea mays; Oil; Protein; Multivariate analysis Cereals.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/11031

DISCUSSANT'S COMMENTS FOR AMERICAN AGRICULTURAL ECONOMICS ASSOCIATION ANNUAL MEETING, SELECTED PAPERS SESSION SP-3S, "PRICE ANALYSIS OF FOREIGN MARKETS"
Provedor de dados: 31
Autores: Haigh,   Michael S.
This is a potpourri of price analyses involving developed, developing and transition economies.  Papers included in this session: Dynamics of Polish Wheat Prices in Comparison to Selected World Prices in a Period of Economic Transformation, Szczepan Figiel, Olsztyn University of Agriculture and Technology. Economic and Environmental Impacts of the Post-1992 CAP Reforms on Alentejo Economy of Portugal, Amilcar Serrao, Universidade de Evora. Effects of Dutch Mineral Policies on Land Prices: A Micro Economic Simulation Approach, Maroeska Boots, Alfons Oude Lansink, and Jack Peerlings. Maize Markets and Rural Storage in Mozambique: A Spatial and Temporal Analysis,                                                 Channing Arndt, Purdue University; Rico Schiller...
Tipo: Conference Paper or Presentation
Palavras-chave: Demand and Price Analysis; International Development.
Ano: 1998
URL: http://purl.umn.edu/20949

DISCUSSANT'S COMMENTS FOR AMERICAN AGRICULTURAL ECONOMICS ASSOCIATION ANNUAL MEETING, SELECTED PAPERS SESSION SP-6R: "ADOPTION OF TECHNOLOGY IN DEVELOPING COUNTRIES"
Provedor de dados: 31
Autores: Renkow,   Mitch.
These papers move beyond the questions of who adopts technologies to ask how preferences for characteristics (of maize in Mexico or cattle in Burkina Faso) affect adoption and how technical change differentially affects semi-subsistence farmers and how it affects productivity and yield variability.  Papers include: Modeling Impacts of Soil Conservation on Productivity and Yield Variability: Evidence From a Heteroskedastic Switching Regression Gerald Shively, Purdue University.   Selecting Genetic Traits for Cattle Improvement: Preservation of Disease Resistant Cattle in Africa Kouadio Tano, Merle Faminow, Mulumba Kamuanga, Brent Swallow.   Variety Characteristics and the Land Allocation Decisions of Farmers in a Center of Maize Diversity Melinda Smale,...
Tipo: Conference Paper or Presentation
Palavras-chave: International Development; Research and Development/Tech Change/Emerging Technologies.
Ano: 1998
URL: http://purl.umn.edu/20856

Disponibilidad de Pb, Cd y Ni por la adición de fósforo y azufre en suelos regados con agua residual, en el Valle del Mezquital, Hidalgo.
Provedor de dados: 32
Autores: Solís Martínez, Martín.
Se evaluó el efecto de la adición de azufre y fósforo sobre la extractabilidad de Pb, Cd y Ni, y en la biodisponibilidad para maíz y alfalfa en el valle del Mezquital, Hidalgo. Se muestrearon los suelos de 13 sitios, se caracterizaron física y químicamente y se determinaron los elementos potencialmente tóxicos totales y extractables. De estos suelos se seleccionaron tres (Atitalaquia, Tlahuelilpan y Tepatepec) para establecer experimentos de equilibrio en el laboratorio. Los suelos se incubaron con dosis crecientes de azufre (0, 2, 4 y 6 t ha-1) y fósforo (0, 250, 500, 1000 y 2000 mg L-1), durante cinco y dos semanas, respectivamente. Se cuantificó la concentración de Pb, Cd y Ni, unidos a las diferentes fracciones del suelo (soluble, FI; intercambiable,...
Palavras-chave: Elementos potencialmente tóxicos; Extracción secuencial; Alfalfa; Maíz; Difracción de rayos x; Potentially toxic elements; Sequential extraction; Corn; X-ray diffraction; Edafología; Doctorado.
Ano: 2014
URL: http://hdl.handle.net/10521/2268

Disponibilização de fósforo, correção do solo, teores foliares e rendimento de milho após a incorporação de fosfatos e lodo de curtume natural e compostado - doi: 10.4025/actasciagron.v33i2.1021
Provedor de dados: 1
Autores: Araujo, Fabio Fernando de; UNOESTE.
O objetivo deste trabalho foi avaliar o efeito do lodo de curtume associado à fosforita (fosfato natural) sobre a disponibilização de fósforo e correção do solo, teores foliares e rendimento de milho. O experimento foi conduzido em campo durante 12 meses (outubro de 2005 a outubro de 2006) com a incorporação de 2,5 e 5,0 Mg ha-1 de lodo de curtume (natural e compostado) e 100 kg de P2O5 ha-1 na forma de fosfato solúvel e natural (fosforita) no início do experimento. Durante a safra de verão (2005/2006) foi cultivado milho na área experimental. O tratamento com lodo de curtume natural, na dose de 5,0 Mg ha-1 associado à fosforita, elevou os teores de fósforo, cálcio e saturação por bases no solo avaliados aos 360 dias da sua aplicação. Este tratamento...
Palavras-chave: 5.07.02.05-0 fósforo no solo; Zea mays; Resíduo industrial Aproveitamento de subprodutos phosphorus in soil; Zea mays; Industrial waste.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1021

Disrupting Demand for Commercial Seed: Input Subsidies in Malawi and Zambia
Provedor de dados: 31
Autores: Mason,   Nicole M.; Ricker-Gilbert,   Jacob.
Input subsidy programs that provide inorganic fertilizer and improved maize seed to small farmers below market rates are currently receiving a great deal of support as a sustainable strategy to foster an African Green Revolution. In recent years numerous countries in Sub-Saharan Africa (SSA) including Ghana, Kenya, Malawi, Mali, Senegal, Tanzania, and Zambia have implemented such programs at substantial cost to government and donor budgets. For example, in 2008 Malawi spent roughly 70% of the Ministry of Agriculture’s budget or just over 16% of the government’s total budget subsidizing fertilizer and seed. In Zambia between 2004 and 2011, an average of 40% of the government’s agricultural sector budget was devoted to fertilizer and maize seed subsidies...
Tipo: Working Paper
Palavras-chave: Malawi; Zambia; Seed; Input subsidies; Agricultural and Food Policy; Food Security and Poverty.
Ano: 2012
URL: http://purl.umn.edu/123554

Dissecting the Opaque-2 regulatory network using transcriptome and proteome approaches along with enzyme activity measurements
Provedor de dados: 63
Autores: Lefèvre,Agnès; Consoli,Luciano; Gaziola,Salete A.; Pellegrino,Ana Paula; Azevedo,Ricardo A.; Damerval,Catherine.
The Opaque-2 (O2) gene encodes a transcriptional activator specifically expressed for grain development of maize. o2 mutants have an opaque and chalky kernel, with a decrease in zein storage protein content, and an increase in the proportions of lysine and tryptophan. In this review, we present recent results investigating genetic properties of the O2 network, using transcriptome and proteome approaches, associated with measurements of activities of enzymes of the aspartate pathway and lysine degradation. The structural polymorphism at the O2 locus was investigated by RFLP in a collection of 51 maize inbred lines. Most polymorphic sites were found outside the coding regions. We then searched for relationships between RFLP polymorphism and (i) mRNA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zein; Aspartate kinase; Lysine oxoglutarate reductase/saccharopine dehydrogenase; Polymorphism.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200031

Distinct sporulation dynamics of arbuscular mycorrhizal fungal communities from different agroecosystems in long-term microcosms
Provedor de dados: 21
Autores: Oehl, Fritz; Sieverding, Ewald; Ineichen, Kurt; Mäder, Paul; Wiemken, Andres; Boller, Thomas.
The aim of this study was to investigate sporulation dynamics of arbuscular mycorrhizal fungal (AMF) communities from agroecosystems differing in land use intensity in long-term experimental microcosms. These were set up with characteristic grassland plants (Lolium perenne, Trifolium pratense, Plantago lanceolata), and inoculated with soils from several grasslands and arable lands subjected to crop rotation or continuous monocropping. The microcosms were maintained under ambient light and temperature conditions over 3 years. A novel, localized sampling scheme was applied for attaining exclusively the newly formed spores at bimonthly intervals. Overall, 39 AMF species were detected by morphological spore identification. Some species were recovered from all...
Tipo: Journal paper
Palavras-chave: Soil.
Ano: 2009
URL: http://orgprints.org/26382/1/Oehl_etal_2009_AEE134.pdf

DISTORTED PRICES AND PRODUCER EFFICIENCY - ROMANIAN MAIZE
Provedor de dados: 31
Autores: Balint,   Borbala; Sauer,   Johannes.
This research aims at shedding empirical light on the relative efficiency of small-scale maize producers in Romania. Farmers in transition countries still face heavily distorted price systems resulting from imperfect market conditions and socioeconomic and institutional constraints. To capture such distortions we formulate a stochastic shadow-cost frontier model to investigate the systematic input-specific allocative inefficiency. We further adjust the underlying cost frontier by incorporating shadow price corrections and subsequently reveal evidence on farm specific technical inefficiency. Different models are estimated due to the imposition of curvature correctness and the effects on the individual efficiency estimates are shown. The empirical results...
Tipo: Conference Paper or Presentation
Palavras-chave: Efficiency; Shadow Cost Frontier; Functional Consistency; Maize; Romania; Crop Production/Industries; C40; D24; O33.
Ano: 2006
URL: http://purl.umn.edu/14958

Distribuição do crédito agrícola para o milho e sorgo nas regiões brasileiras.
Provedor de dados: 14
Autores: RUAS, D. G. G.; GARCIA, J. C.
O presente trabalho procura fornecer uma visao de como tem sido a distribuicao de credito para as culturas de milho e sorgo no Brasil. A primeira parte, referente ao milho, apresenta os montantes destinados a custeios e comercializacao e o numero de contratos para cada uma desta modalidades. Estes dados sao apresentados a nivel nacional e tambem subdivididos entre as regioes. Discute-se ainda, a relacao entre valor da producao e o total de credito de custeios, o que permite uma visao preliminar do comportamento do credito como instrumento de incentivo a producao. A segunda parte, referente ao sorgo, comtempla os mesmos aspectos da primeira. No final sao apresentados algumas consideracoes sobre a funcao do credito nas culturas de milho e sorgo.
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Distribuicao; Maize.; Crédito Agrícola; Milho; Sorghum Bicolor; Sorgo; Zea Mays.; Agricultural credit.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476051

Distribution of linker histone variants during plant cell differentiation in the developmental zones of the maize root, dedifferentiation in callus culture after auxin treatment
Provedor de dados: 48
Autores: ALATZAS,ANASTASIOS; SREBREVA,LJUBA; FOUNDOULI,ATHINA.
Although several linker histone variants have been studied in both animal and plant organisms, little is known about their distribution during processes that involve alterations in chromatin function, such as differentiation, dedifferentiation and hormone treatment. In this study, we identified linker histone variants by using specific anti-histone Hl antibodies. Each variant's ratio to total Hl in the three developmental zones of maize (Zea mays L.) root and in callus cultures derived from them was estimated in order to define possible alterations either during plant cell differentiation or during their dedifferentiation. We also evaluated linker histone variants' ratios in the developmental zones of maize roots treated with auxin in order to examine the...
Tipo: Journal article
Palavras-chave: Callus culture; Linker histone; Plant cell differentiation; Plant hormone; Zea mays.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000200010

DISTRIBUTION OF MAIZE SEED IN A SEEDING LINE PROTOTYPE USING MICROCONTROLLED DATA ACQUISITION SYSTEMS
Provedor de dados: 70
Autores: Reis,Elton F. dos; Borges Neto,Antônio C.; Couto,Ródney F.
ABSTRACT: The aim of this study was evaluate the longitudinal distribution of maize seeds using a seeding line prototype, whit a microcontroller data acquisition system, at different speeds and types of horizontal feeder discs. Initially it was constructed a prototype simulator of seeding line, in the laboratory, and mounted two systems of microcontroller data acquisitions with infrared sensors for maize seeds counting. A test was conducted in a completely randomized design in split plots with factorial scheme of treatments 5 x 2 x 2, being the parcel two types of microcontroller data acquisition systems (infrared sensors in parallel and an diffuse infrared sensor), the factors were two feeder discs of maize seeds (inclined and normal) and five sowing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sensor; Microcontroller; Horizontal disc.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601148

Distribution of soluble amino acids in maize endosperm mutants
Provedor de dados: 63
Autores: Toro,Alejandro Alberto; Medici,Leonardo Oliveira; Sodek,Ladaslav; Lea,Peter John; Azevedo,Ricardo Antunes.
For human nutrition the main source of vegetable proteins are cereal and legume seeds. The content of total soluble amino acids in mature endosperm of wild-type, opaque and floury maize (Zea mays L.) mutants were determined by HPLC. The total absolute concentration of soluble amino acids among the mutants varied depending on the mutant. The o11 and o13 mutants exhibited the highest average content, whereas o10, fl3 and fl1 exhibited the lowest average content. In general, the mutants exhibited similar concentrations of total soluble amino acids when compared to the wild-type lines, with the clear exception of mutants o11 and fl1, with the o11 mutant exhibiting a higher concentration of total soluble amino acids when compared to its wild-type counterpart...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Lysine; Threonine; Methionine.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100014

Distribution pattern of the corn army worm, Mythimna separata Walker
Provedor de dados: 106
Autores: Sawarng Charoenying; Sunisa Jatuporn; Surachate Jamornmarn.
1 table
Palavras-chave: Corn; Maize; Armyworms; Mythimna separata; Distribution pattern; ข้าวโพด; หนอนกระทู้.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4569

Diversidad de especies de aves en el cultivo de maíz asociado al bosque secundario, en el centro del Estado de Veracruz
Provedor de dados: 32
Autores: Alducin Chávez, Gerson Daniel.
Las áreas naturales han sufrido cambios por las actividades productivas en la mayor parte de los territorios donde el hombre se ha establecido. No obstante, en algunos lugares parte de la superficie forestal mantiene su estructura y función, siendo estos últimos sitios relevantes para la conservación de la biodiversidad. La presente tesis tuvo como objetivo evaluar la diversidad de especies de aves residentes y migratorias en un paisaje agrícola con parches de bosque secundario. Para ello se realizaron muestreos, uno por cada estación del año, utilizando conjuntamente observaciones y redes, tomando como sitios de muestreo tres parcelas de cultivo de maíz rodeadas de bosque secundario y un parche del mismo tipo de bosque. Esto permitió probar la hipótesis...
Palavras-chave: Agoecosistemas; Paisaje rural; Biodiversidad; Agroecosystems; Countryside; Biodiversity; Agroecosistemas Tropicales; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2338

Diversidad de maíces nativos de tres nichos ecológicos del altiplano poblano-tlaxcalteca.
Provedor de dados: 32
Autores: Alvarado Beltrán, Gregorio.
Con la finalidad de evaluar el nivel de diversidad morfológica y genética de maíces nativos de los nichos ecológicos de Libres, Mazapiltepec y Huamantla, correspondientes a los estados de Puebla y Tlaxcala, se desarrolló la presente investigación, la cual se dividió en dos etapas. La primera comprendió una caracterización morfológica, evaluando 134 poblaciones nativas de la región de estudio, siete testigos raciales y tres testigos comerciales, en un diseño experimental látice simple 12 x 12 con dos repeticiones en tres localidades, registrándose 21 caracteres morfológicos. La segunda consistió en un análisis isoenzimático en 49 poblaciones nativas representativas y cinco testigos raciales, explorando diez sistemas enzimáticos que codifican para 19 loci....
Palavras-chave: Zea mays L.; Poblaciones nativas; Recursos fitogenéticos; Variabilidad genética; Landraces; Plant genetic resources; Genetic variability; Doctorado; Genética.
Ano: 2010
URL: http://hdl.handle.net/10521/182

Diversidad de maíces nativos de tres nichos ecológicos del altiplano poblano-tlaxcalteca.
Provedor de dados: 32
Autores: Alvarado Beltrán, Gregorio.
Con la finalidad de evaluar el nivel de diversidad morfológica y genética de maíces nativos de los nichos ecológicos de Libres, Mazapiltepec y Huamantla, correspondientes a los estados de Puebla y Tlaxcala, se desarrolló la presente investigación, la cual se dividió en dos etapas. La primera comprendió una caracterización morfológica, evaluando 134 poblaciones nativas de la región de estudio, siete testigos raciales y tres testigos comerciales, en un diseño experimental látice simple 12 x 12 con dos repeticiones en tres localidades, registrándose 21 caracteres morfológicos. La segunda consistió en un análisis isoenzimático en 49 poblaciones nativas representativas y cinco testigos raciales, explorando diez sistemas enzimáticos que codifican para 19 loci....
Palavras-chave: Zea mays L.; Poblaciones nativas; Recursos fitogenéticos; Variabilidad genética; Landraces; Plant genetic resources; Genetic variability; Doctorado; Genética.
Ano: 2010
URL: http://hdl.handle.net/10521/182

Diversidad de maíz potencial agronómico y perspectivas para su conservación y desarrollo in situ, en el sureste del estado de México
Provedor de dados: 32
Autores: González González, Miguel.
Para diseñar estrategias de conservación in situ de la diversidad genética del maíz, se requiere de valorar tanto a la diversidad como al potencial para incrementar la producción bajo el esquema de la agricultura tradicional como punto de referencia. Dado que el intercambio de semilla se da principalmente dentro de las comunidades rurales, se consideró al municipio de Ayapango, Edo. de Méx., para colectar las poblaciones de maíz que se manejan en aproximadamente el 20% de los hogares. Se colectaron 97 poblaciones de la raza Chalqueño, y dos de Cacahuacintle. Dentro de Chalqueño hubo poblaciones del tipo de grano cremoso (49), del conocido localmente como Palomo (19), del azul (24), del rojo (4) denominado localmente como “xitocle”, y una población de...
Tipo: Tesis
Palavras-chave: Diversidad genética; Maíz; Chalqueño; Conservación in situ; Isoenzimas; Doctorado; Genética; Genetic diversity; Maize; Chalqueño; In situ conservation; Isozymes.
Ano: 2007
URL: http://hdl.handle.net/10521/1585

Diversidad genética del maíz, perspectivas para su conservación y desarrollo en una comunidad mixteca de oaxaca: Santa María Tataltepec.
Provedor de dados: 32
Autores: Muñozcano Ruiz, Máximo.
Valorar la diversidad genética y evaluar el potencial agronómico de las poblaciones de maíz nativas de Santa María Tataltepec, Oaxaca, fueron los principales objetivos de esta investigación, como una vía para fomentar el desarrollo regional. Se colectaron 69 poblaciones de maíz nativo (criollo), 65 de Tataltepec y 4 de otras comunidades de la Mixteca; de las 65 poblaciones locales (en 75% de los hogares), 44 fueron de grano blanco, 11 de azul y 10 de amarillo. En el verano del 2010 se establecieron experimentos de campo con repeticiones, en condiciones de temporal. Para valorar la diversidad se caracterizaron las poblaciones mediante siete, diez y cinco variables morfológicas de planta, mazorca y grano, respectivamente y se aplicaron análisis de...
Palavras-chave: Zea mays L.; Bolita; Diversidad genética; Maíces nativos; Pepitilla; Potencial agronómico; Genetic diversity; Native populations (Landraces); Genética; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/596

Diversidad genética en el patosistema maíz-fusarium en el Altiplano de México.
Provedor de dados: 32
Autores: Briones Reyes, Dolores.
Las variantes de maíz (Zea mays L.) nativas (criollos) preservadas por los agricultores a través de generaciones, constituyen más de 80% del área sembrada con maíz en México; la pudrición de mazorca por Fusarium spp. provoca pérdidas de hasta 30%. El estudio de las poblaciones de maíz y sus patógenos como patosistema tiene sentido, pues en la variación genética del maíz nativo se puede encontrar resistencia/tolerancia a enfermedades; el conocimiento de la estructura de las poblaciones de maíz y del patógeno de manera integral ayudaría a resolver el problema de pudrición, aumentar la producción de grano y conservar la diversidad del maíz. En 2010 se colectaron 56 poblaciones de maíz nativo con y sin síntomas de pudrición de mazorca en cinco estados en...
Palavras-chave: Diversidad; Patosistema; Fusarium spp.; Maíz nativo; Pudrición de mazorca; Virulencia; Diversity; Pathosystem; Native maize; Ear rot; Virulence; Genética; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2163

Diversidad genética, potencial agronómico y de calidad en maíces pigmentados de Valles Altos de México.
Provedor de dados: 32
Autores: García Perea, Marco Antonio.
México cuenta con una gran diversidad genética de maíz que es manejada y conservada por pequeños productores que cultivan tradicionalmente un mosaico de variantes, entré estas se encuentran maíces con granos de color azul y rojo, a los que se les han conferido características nutracéuticas por su contenido de antocianinas y calidad de proteína, además de su sabor. Las estrategias de conservación y aprovechamiento in situ de la diversidad genética del maíz requieren valorar tanto la diversidad como al potencial para incrementar la producción y calidad bajo el esquema de la agricultura tradicional, como punto de referencia. Se consideró estudiar la diversidad genética particularizando en las variantes de maíz nativo con granos de color azul y rojo de los...
Palavras-chave: Zea mays; Diversidad genética; Maíces nativos pigmentados; Potencial agronómico; Calidad de proteína; Valles Altos; Genetic diversity; Pigmented native maize; Agronomic potential; Protein quality; High valleys; Genética; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/1842

Diversidad genética y potencial de poblaciones criollas de maíz del centro - sur de Tamaulipas, México
Provedor de dados: 32
Autores: Pecina Martínez, José Agapito.
Se ha demostrado el potencial que tienen las poblaciones criollas de maíz de Tamaulipas;  sin embargo, éstas no se han aprovechado eficientemente, debido al escaso trabajo de  investigación, especialmente en mejoramiento genético realizado en el Estado. Por lo tanto,  es necesario preservar y explorar aún más la diversidad genética y seguir generando  conocimiento que permita definir estrategias y acciones para evitar su erosión y su posible  contaminación con maíces transgénicos que se introduzcan al país. Con base en lo anterior,  desde el 2001, en la Unidad Académica Multidisciplinaria de Agronomía y Ciencias de la  Universidad Autónoma de Tamaulipas se implementó un programa de rescate, conservación  y manejo de germoplasma criollo de maíz. De más de...
Palavras-chave: Maíz criollo de Tamaulipas; Diversidad genética; Aprovechamiento de la diversidad; Mejoramiento de maíz; Indicadores de respuesta ambiental. landraces of maize from Tamaulipas; Genetic diversity; Use of the diversity; Maize breeding; Environmental response indicators.
Ano: 2012
URL: http://hdl.handle.net/10521/876

Diversidad genética y potencial de poblaciones criollas de maíz del centro - sur de Tamaulipas, México
Provedor de dados: 32
Autores: Pecina Martínez, José Agapito.
Se ha demostrado el potencial que tienen las poblaciones criollas de maíz de Tamaulipas;  sin embargo, éstas no se han aprovechado eficientemente, debido al escaso trabajo de  investigación, especialmente en mejoramiento genético realizado en el Estado. Por lo tanto,  es necesario preservar y explorar aún más la diversidad genética y seguir generando  conocimiento que permita definir estrategias y acciones para evitar su erosión y su posible  contaminación con maíces transgénicos que se introduzcan al país. Con base en lo anterior,  desde el 2001, en la Unidad Académica Multidisciplinaria de Agronomía y Ciencias de la  Universidad Autónoma de Tamaulipas se implementó un programa de rescate, conservación  y manejo de germoplasma criollo de maíz. De más de...
Palavras-chave: Maíz criollo de Tamaulipas; Diversidad genética; Aprovechamiento de la diversidad; Mejoramiento de maíz; Indicadores de respuesta ambiental. landraces of maize from Tamaulipas; Genetic diversity; Use of the diversity; Maize breeding; Environmental response indicators.
Ano: 2012
URL: http://hdl.handle.net/10521/823

Diversidad genética y potencial de poblaciones criollas de maíz del centro - sur de Tamaulipas, México
Provedor de dados: 32
Autores: Pecina Martínez, José Agapito.
Se ha demostrado el potencial que tienen las poblaciones criollas de maíz de Tamaulipas;  sin embargo, éstas no se han aprovechado eficientemente, debido al escaso trabajo de  investigación, especialmente en mejoramiento genético realizado en el Estado. Por lo tanto,  es necesario preservar y explorar aún más la diversidad genética y seguir generando  conocimiento que permita definir estrategias y acciones para evitar su erosión y su posible  contaminación con maíces transgénicos que se introduzcan al país. Con base en lo anterior,  desde el 2001, en la Unidad Académica Multidisciplinaria de Agronomía y Ciencias de la  Universidad Autónoma de Tamaulipas se implementó un programa de rescate, conservación  y manejo de germoplasma criollo de maíz. De más de...
Tipo: Tesis
Palavras-chave: Maíz criollo de Tamaulipas; Diversidad genética; Aprovechamiento de la diversidad; Mejoramiento de maíz; Indicadores de respuesta ambiental.; Landraces of maize from Tamaulipas; Genetic diversity; Use of the diversity; Maize breeding; Environmental response indicators.
Ano: 2008
URL: http://hdl.handle.net/10521/1192

Diversidad morfológica de maíces nativos (Zea mays L.) en el trópico húmedo poblano: magnitud y usos.
Provedor de dados: 32
Autores: López Morales, Fernando.
La diversidad del maíz es tal que en cada región de México existen variedades locales adaptadas a las condiciones climáticas, edáficas, altitudinales y de manejo, bajo las cuales se está produciendo este cultivo. Por esta razón se ha planteado que la actual diversidad genética presente en las poblaciones locales de maíz, ha sido el producto de la interacción entre las diferentes culturas étnicas y las diversas condiciones ambientales que crean los agroecosistemas en las regiones de temporal. Por lo tanto, este estudio tuvo por objetivo general el estudiar la diversidad morfológica y de usos de los maíces nativos cultivados en cuatro municipios del trópico húmedo de Puebla: Tenampulco, Ayotoxco de Guerrero, Hueytamalco y San José Acateno. Para ello, durante...
Palavras-chave: Características agronómicas; Caracterización morfológica; Correspondencia racial; Poblaciones nativas; Usos; Agronomic traits; Landraces; Morphological characterization; Racial correspondence; Uses; EDAR; Estrategias para el Desarrollo Agrícola Regional; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1721

Diversidad morfológica y agronómica de poblaciones nativas de frijol común cultivadas en asociación con maíz
Provedor de dados: 32
Autores: Rocandio Rodríguez, Mario.
México es centro de origen, domesticación y diversificación del frijol (Phaseolus vulgaris L.)  y maíz (Zea mays L.). Ambas especies han sido importantes desde la época prehispánica, y la  diversidad fenotípica y genética de ambos cultivos es conservada en forma de poblaciones  nativas cultivadas por los agricultores en la actualidad. En la región suroriental del estado de  México, el sistema de producción “milpa” se practica en la actualidad, con base en una gran  diversidad de poblaciones nativas de frijol común de crecimiento indeterminado cultivadas en  asociación con maíz. La diversidad morfológica y genética han sido estudiadas, mostrando   amplia variación en formas de planta y semilla. Sin embargo, el potencial de producción de  estas poblaciones...
Tipo: Tesis
Palavras-chave: Phaseolus vulgaris; Zea mayz; Milpa; Poblaciones nativas; Maestría; Genética; Landrace.
Ano: 2008
URL: http://hdl.handle.net/10521/1270

Diversidad morfológica y bromatológica de 75 variedades nativas de frijol común del Centro-Sur de México, cultivadas en asociación con maíz.
Provedor de dados: 32
Autores: Espinosa Pérez, Esteli Nilovna.
México es el principal centro de origen, domesticación y diversificación del frijol común, que junto con el maíz, han sido importantes desde la época prehispánica por su valor económico, social, biológico y alimenticio. Además, su grano es un alimento básico por su notable aporte protéico a la dieta humana, sobre todo en poblaciones de bajos recursos, además de que su uso está asociado a factores culturales debido a preferencias locales o regionales específicas. En la actualidad la amplia diversidad fenotípica y genética de estos cultivos se conserva en poblaciones nativas y por los agricultores. Su cultivo se realiza en casi todas las condiciones agroecológicas del país y sistemas de producción, resaltando la asociación maíz-frijol, debido a sus...
Palavras-chave: Phaseolus vulgaris L.; Poblaciones Nativas; Caracterización Morfológica; Parámetros Fitoquímicos; Native Populations; Morphological Characterization; Phytochemical Parameters; Genética; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2229

Diversidad morfológica y genética de maíz cacahuacintle en una región de los valles altos de Puebla.
Provedor de dados: 32
Autores: Hernández Galeno, César del Ángel.
La raza de maíz Cacahuacintle cuenta con un área propicia para su cultivo en los valles altos del Estado de Puebla, México. Esta raza, en virtud de sus usos especiales, tiene un nicho de mercado favorable en comparación con el maíz de otras razas; sin embargo, existen pocos trabajos que aborden aspectos relacionados con su cultivo y diversidad. Con la finalidad de caracterizar la diversidad genética y la aptitud para preparar pozole de poblaciones criollas de maíz Cacahuacintle de los Valles Altos de Puebla se realizó un estudio utilizando variables morfológicas, polimorfismo de isoenzimas, y de caracteres físicos, químicos y variables tecnológicas asociadas con la calidad pozolera. El análisis de varianza arrojó diferencias altamente significativas entre...
Palavras-chave: Zea mays L.; Calidad pozolera; Isoenzimas; Recursos fitogenéticos; Variables tecnológicas; Pozole quality; Isozymes; Plant genetic resources; Technological variables; Maestría; Genética.
Ano: 2010
URL: http://hdl.handle.net/10521/203

Diversidad morfológica y genética de maíz cacahuacintle en una región de los valles altos de Puebla.
Provedor de dados: 32
Autores: Hernández Galeno, César del Ángel.
La raza de maíz Cacahuacintle cuenta con un área propicia para su cultivo en los valles altos del Estado de Puebla, México. Esta raza, en virtud de sus usos especiales, tiene un nicho de mercado favorable en comparación con el maíz de otras razas; sin embargo, existen pocos trabajos que aborden aspectos relacionados con su cultivo y diversidad. Con la finalidad de caracterizar la diversidad genética y la aptitud para preparar pozole de poblaciones criollas de maíz Cacahuacintle de los Valles Altos de Puebla se realizó un estudio utilizando variables morfológicas, polimorfismo de isoenzimas, y de caracteres físicos, químicos y variables tecnológicas asociadas con la calidad pozolera. El análisis de varianza arrojó diferencias altamente significativas entre...
Palavras-chave: Zea mays L.; Calidad pozolera; Isoenzimas; Recursos fitogenéticos; Variables tecnológicas; Pozole quality; Isozymes; Plant genetic resources; Technological variables; Maestría; Genética.
Ano: 2010
URL: http://hdl.handle.net/10521/203

Diversidad morfológica y variación isoenzimática de maíces nativos del altiplano centro-oriente del estado de Puebla.
Provedor de dados: 32
Autores: Hortelano Santa Rosa, René.
La presente investigación tuvo por objetivo cuantificar y analizar la diversidad genética (a nivel morfológico e isoenzimático) presente actualmente entre poblaciones nativas de maíz (Zea mays L.), cultivadas en la región Centro-Oriente del Altiplano del estado de Puebla, así como establecer las relaciones de similitud que aquellas presentan con las razas reportadas para el área. El trabajo se desarrolló en dos etapas: la primera consistió en la evaluación, en tres localidades, de 134 poblaciones nativas, seis accesiones „tipo‟ de las razas Cónico, Cónico Norteño, Palomero Toluqueño, Chalqueño y sus variantes Chalqueño Crema y Chalqueño Palomo y cuatro variedades comerciales recomendadas para la zona. El diseño empleado fue un látice simple 12x12. Durante...
Palavras-chave: Zea mays L.; Isoenzimas; Poblaciones nativas; Diversidad fenotípica; Valles Altos; Raza Chalqueño; Isozymes; Native populations; Phenotypic diversity; Highlands; Chalqueño race; Doctorado; Genética.
Ano: 2010
URL: http://hdl.handle.net/10521/183

Diversidad morfológica y variación isoenzimática de maíces nativos del altiplano centro-oriente del estado de Puebla.
Provedor de dados: 32
Autores: Hortelano Santa Rosa, René.
La presente investigación tuvo por objetivo cuantificar y analizar la diversidad genética (a nivel morfológico e isoenzimático) presente actualmente entre poblaciones nativas de maíz (Zea mays L.), cultivadas en la región Centro-Oriente del Altiplano del estado de Puebla, así como establecer las relaciones de similitud que aquellas presentan con las razas reportadas para el área. El trabajo se desarrolló en dos etapas: la primera consistió en la evaluación, en tres localidades, de 134 poblaciones nativas, seis accesiones „tipo‟ de las razas Cónico, Cónico Norteño, Palomero Toluqueño, Chalqueño y sus variantes Chalqueño Crema y Chalqueño Palomo y cuatro variedades comerciales recomendadas para la zona. El diseño empleado fue un látice simple 12x12. Durante...
Palavras-chave: Zea mays L.; Isoenzimas; Poblaciones nativas; Diversidad fenotípica; Valles Altos; Raza Chalqueño; Isozymes; Native populations; Phenotypic diversity; Highlands; Chalqueño race; Doctorado; Genética.
Ano: 2010
URL: http://hdl.handle.net/10521/183

Diversidad y caracterización de poblaciones bacterianas asociadas a esclerocios de Claviceps gigantea Fuentes et al. en maíz (Zea mays L.) con potencial antagonista, en el Estado de México.
Provedor de dados: 32
Autores: Ayala Torres, Ana María.
Un total de 129 aislamientos bacterianos obtenidos de la micósfera de esclerocios de Claviceps gigantea se evaluaron in vitro para determinar su capacidad de inhibir el crecimiento de Fusarium graminearum, F. subglutinans y F. verticillioides patógenos a maíz. Ensayos cualitativos en confrontación dual, resultaron en la selección de 22 aislamientos bacterianos con el mayor potencial antagónico hacia una, dos o las tres especies de Fusarium. Los aislamientos se identificaron molecularmente mediante secuenciación parcial del gen 16s ADNr. Las cepas con mayor grado de antagonismo pertenecen a los géneros Bacillus y Pseudomonas. La caracterización en la producción de metabolitos potencialmente involucrados en la actividad antagónica, mostró que el 100% de las...
Palavras-chave: Bacillus; Pseudomonas; Biocontrol; Metabolitos secundarios; Caracterización; Secondary metabolites; Characterization; Fitopatología; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2299

Diversidad y estructura genética de poblaciones de hongos patógenos infectando larvas de gallina ciega en Guanajuato, México.
Provedor de dados: 32
Autores: Carrillo Benitez, María Guadalupe.
Los hongos entomopatógenos se encuentran  comúnmente en el suelo, por lo que el estudio y determinación de poblaciones nativas de estos microorganismos, previos es importante, previos a la introducción de aislamientos exóticos, es importante. Las larvas de gallina ciega causan daños a cultivos importantes como el maíz en Guanajuato y otras regiones de México. La principal estrategia de manejo de esta plaga es el control químico; sin embargo, su efecto no ha sido suficiente por lo que se requiere de otras alternativas. El control microbiano es una de las estrategias más importantes para plagas de suelo, y especies dentro de los géneros Beauveria y Metarhizium estánson consideradosconsideradas entre los candidatos más prometedores. Esta investigación reporta...
Palavras-chave: Beauveria pseudobassiana; Metarhizium anisopliae; Metarhizium pingshaense; Metarhizium robertsii; Taxonomía molecular; Microsatélites; ERIC; Phyllophaga polyphylla; Entomología y Acarología; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/1695

Diversidade genética em populações de Daubulus maidis (DeLong &amp; Wolcott) (Hemiptera: cicadellidae) do Brasil através de marcadores RAPD-PCR.
Provedor de dados: 14
Autores: OLIVEIRA, C. M. de; LOPES, J. R. S.; CAMARGO, L. E. A.; FUNGARO, M. H. P.; NAULT, L. R.
bitstream/CPAC-2009/25344/1/p2004_50.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: RAPD; Pests of plants; Maize.; Cigarrinha; Marcador Molecular; Milho; Praga de Planta; Variação Genética; Zea Mays.; Genetic variation.; Genetic markers.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568343

Diversifizierung des Silomaisanbaus
Provedor de dados: 21
Autores: Schumann, Caroline; Müller-Lindenlauf, Maria; Gayer, Christoph; Stolzenburg, Kerstin; Wurth, Wilhelm.
Dieses Forschungsvorhaben hat drei Schwerpunkte. Erstens wird die Attraktivität von Mais (Zea mays L.), angebaut im Gemenge mit Stangenbohnen (Phaseolus vulgaris L.), für verschiedene Artengruppen, z.B. Laufkäfer (Carabidae LATREILLE), untersucht. Zweitens wird die Futterqualität von Mais-Bohnen-Silagen für Milchkühe getestet. Drittens werden weitere Gemengepartner für den Mais geprüft. Erste Ergebnisse werden in 2019 erwartet.
Tipo: Conference paper, poster, etc.
Palavras-chave: Pasture and forage crops; Dairy cattle; Biodiversity and ecosystem services.
Ano: 2019
URL: http://orgprints.org/36173/1/Beitrag_246_final_a.pdf

Diversity and capacity to promote maize growth of bacteria isolated from the Amazon region
Provedor de dados: 36
Autores: SILVA,Krisle da; PERIN,Liamara; GOMES,Maria de Lourdes; BARAÚNA,Alexandre Cardoso; PEREIRA,Gilmara Maria Duarte; MOSQUEIRA,Cátia Aparecida; COSTA,Ismaele Breckenfeld da; O'HARA,Graham; ZILLI,Jerri Édson.
ABSTRACT Maize plants can establish beneficial associations with plant growth-promoting bacteria. However, few studies have been conducted on the characterization and inoculation of these bacteria in the Amazon region. This study aimed to characterize endophytic bacteria isolated from maize in the Amazon region and to assess their capacity to promote plant growth. Fifty-five bacterial isolates were obtained from maize grown in two types of ecosystems, i.e., a cerrado (savanna) and a forest area. The isolates were characterized by the presence of the nifH gene, their ability to synthesize indole-3-acetic acid (IAA) and solubilize calcium phosphate (CaHPO4), and 16S rRNA partial gene sequencing. Twenty-four bacteria contained the nifH gene, of which seven...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological nitrogen fixation; Zea mays L.; 16S rRNA.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000200111

Do Farmers Really Benefit from High Food Prices? Balancing Rural Interest in Kenya's Maize Pricing and Marketing Policy
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Yamano,   Takashi; Nyoro,   James K.; Awuor,   Tom.
This paper uses information from rural household surveys in 24 districts in Kenya to inform current debate on maize pricing policy. Specifically, it sheds light on how rural farm households are being affected by governmental efforts to support maize price levels. Using information on landed import costs of white maize from South Africa with and without the import tariff, it simulates the effects of eliminating the tariff on rural smallholder farmers, large-scale farmers, and urban consumers. It then examines the implications of these findings for the design of strategies to promote agricultural productivity and rural income growth.
Tipo: Working or Discussion Paper
Palavras-chave: Food Security; Food Policy; Kenya; Maize; Marketing; Demand and Price Analysis; Marketing; Q18.
Ano: 2001
URL: http://purl.umn.edu/55149

Do Farmers Really Benefit from High Food Prices? Balancing Rural Interests in Kenya's Maize Pricing and Marketing Policy
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Yamano,   Takashi; Nyoro,   James K.; Awuor,   Tom.
Published by Tegemeo Institute for Agricultural Policy and Development
Tipo: Report
Palavras-chave: Food security; Food policy; Kenya; Maize; Crop Production/Industries; Marketing; Q18.
Ano: 2000
URL: http://purl.umn.edu/54641

Do Fertilizer Subsidies Affect the Demand for Commercial Fertilizer? An Example from Malawi
Provedor de dados: 31
Autores: Ricker-Gilbert,   Jacob; Jayne,   Thomas S.
Replaced with revised version of paper 07/24/09.
Tipo: Conference Paper or Presentation
Palavras-chave: Africa; Fertilizer subsidies; Panel data; Double hurdle model; Endogeneity; Agricultural and Food Policy.
Ano: 2009
URL: http://purl.umn.edu/51606

DOA-Maize research and development
Provedor de dados: 106
Autores: Pichet Grudloyma; Somrak Noradechanon; Surapong Prasitwattanaseree; Kalaya papintu; Manoon Pumklom.
9 tables
Palavras-chave: Corn; Maize; Population improvement; Hybrids; Cooperative program; Biotechnology; AMBIONET; Plant breeding; ข้าวโพด; การปรับปรุงประชากร; พันธุ์ลูกผสม; โครงการความร่วมมือ; เทคโนโลยีชีวภาพ; แอมไบโอเนท.
Ano: 2001
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4159

Does Adoption of Improved Maize Varieties Reduce Poverty? Evidence from Kenya
Provedor de dados: 31
Autores: Mwangi,   Wilfred; Mwabu,   Germano; Nyangito,   Hezron Omare.
Adoption of technologies that increase farm yields is a prerequisite for poverty alleviation in agrarian societies. However, the link between adoption of improved agricultural technologies and poverty reduction is not well understood or documented. This relationship is explored with an example of improved maize seed adoption in Laikipia and Suba - two rural districts in Kenya. We show that adopters of improved maize varieties have higher yields per acre and that poverty is negatively correlated with technology adoption. Policies for increasing diffusion of these technologies include improving access roads to market centers to enhance maize profitability and extension of information about improved maize varieties to farmers.
Tipo: Conference Paper or Presentation
Palavras-chave: Maize adoption; Technologies; Poverty; Policies; Kenya; Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/25376

Does Bt maize cultivation affect the non-target insect community in the agro ecosystem?
Provedor de dados: 92
Autores: Resende,Daniela Chaves; Mendes,Simone Martins; Marucci,Rosangela C.; Silva,Alessandra de Carvalho; Campanha,Mônica Matoso; Waquil,José Magid.
ABSTRACT The cultivation of genetically modified crops in Brazil has led to the need to assess the impacts of this technology on non-target species. Under field conditions, the potential effect on insect biodiversity was evaluated by comparing a homogeneous corn field with conventional and transgenic maize, expressing different Bt proteins in seven counties of Minas Gerais, Brazil. The richness pattern of non-target insect species, secondary pests and natural enemies were observed. The results do not support the hypothesis that Bt protein affects insect biodiversity. The richness and diversity data of insects studied were dependent on the location and other factors, such as the use of insecticides, which may be a major factor where they are used.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosafety; GM maize; Tri-trophic interactions; Integrated pest management.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000100082

Does Cereal crops asymmetrically affect Agriculture gross domestic product in Pakistan? Using NARDL model approach
Provedor de dados: 65
Autores: Ali,Imad; Khan,Imran; Ali,Hashmat; Baz,Khan; Zhang,Qiangqiang; Khan,Ajab; Huo,Xuexi.
ABSTRACT: This study contributes to the extant literature on the nexus among rice, maize and wheat production with agriculture gross domestic product (AGDP) of Pakistan. We use time series data from 1970 to 2017 and employ the Non-linear Autoregressive Distributed Lag (NARDL) model. Short run and long run shocks between the selected variables and result’s is checked through the co-integration and nonlinear error correction model.Autoregressive distributed lag bound testing approach for co-integration and to find the relationship between variables Granger causality test is applied.Our results confirm co-integration, positive shocks results show that rice, maize and wheat production have significantly influence on AGDP. The asymmetrically positive shocks of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: NARDL model; Asymmetric causality; Symmetric causality; Cereal crops; Pakistan AGDP.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000500403

Does Household Headship Affect Demand for Hybrid Maize Seed in Kenya? An Exploratory Analysis Based on 2010 Survey Data
Provedor de dados: 31
Autores: Smale,   Melinda.
Women are central to food production and maize is a dominant food staple in Sub-Saharan Africa, but published gender analyses of hybrid seed use in Sub-Saharan Africa are uncommon. Building on previous work, this paper tests the effects of headship definitions on hybrid seed use and explores the variation between male- and female-headed households and among female-headed households in Kenya. Analysis is based on survey data collected by Tegemeo Institute of Egerton College during the 2009-10 cropping season.
Tipo: Working Paper
Palavras-chave: Maize; Seed; Kenya; Household headship; Agricultural and Food Policy; Consumer/Household Economics; Crop Production/Industries; Food Security and Poverty.
Ano: 2011
URL: http://purl.umn.edu/118475

Does Land Use Patterns Matter for Bt-Maize: The Case of Maize Farming System in Kenya
Provedor de dados: 31
Autores: Muhammad,   Lutta; Owuor,   George; De Groote,   Hugo; Kimenju,   Simon Chege.
Population pressures and the need to optimize the use of limited available land has led to increasing cropping affluence levels within the maize agro-ecologies in Kenya, and a shift from large to smallholder intensification and multiple cropping patterns. Using a geographic information system, this study relates cropping patterns, by area share, maize productivity and household incomes across maize agro-ecologies, with the purpose to establish a decision support system for optimizing land allocation and in priority setting for introduction of new technologies such as Bt maize varieties. Results show that land use patterns and maize productivity in maize farming systems differ between agroecological zones. The high potential areas experience high maize...
Tipo: Conference Paper or Presentation
Palavras-chave: Land use; Smallholders; Maize production; Food security; Kenya; Crop Production/Industries; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/25609

Does Subsidizing Fertilizer Increase Yields? Evidence from Malawi
Provedor de dados: 31
Autores: Ricker-Gilbert,   Jacob; Jayne,   Thomas S.; Black,   J. Roy.
Despite their strain on government and donor budgets, fertilizer subsidies have once again become popular policy tools in several Sub-Saharan Africa countries as a potential way to increase yields in staple crops like maize. Policy makers often assume that farmers who receive the subsidy will achieve yield responses that are similar to those obtained by farmers who pay commercial prices for the input. This notion has not been verified empirically. Our study uses panel data from Malawi, a country that recently implemented a fertilizer subsidy program, to compare maize yield response to fertilizer from farmers who received subsidized fertilizer with yield responses from those who paid commercial prices for the input. Descriptive results indicate that maize...
Tipo: Conference Paper or Presentation
Palavras-chave: Malawi; Fertilizer Subsidies; Production Function; Crop Production/Industries.
Ano: 2009
URL: http://purl.umn.edu/49532

Dois ciclos de seleção entre e dentro de famílias de meios-irmãos na variedade de milho BR 5028 São Francisco.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; SANTOS, M. X. dos.
bitstream/item/87369/1/CPATC-PESQ.-AND.-9-96.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Melhoramento genético; Maize; Genetics improvement.; Milho; Seleção.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/359374

Dominos in the dairy: An analysis of transgenic maize in Dutch dairy farming
Provedor de dados: 31
Autores: Groeneveld,   Rolf A.; Wesseler,   Justus; Berentsen,   Paul B.M.
Isolation distances to limit the risk of cross-pollination from transgenic to nontransgenic crops can severely limit the potential use of transgenic crops through a so-called 'domino effect' where a field of non-transgenic crops limits adoption of transgenic crops not only on plots in its direct vicinity, but also in plots further away as its neighbors are forced to grow the non-transgenic varieties, forcing their neighbors to grow the non-transgenic variety, and so on. The extent to which this effect takes place, however, may depend crucially on the type of farm. For example, dairy farms can use grassland as a buffer between transgenic and conventional maize plots. This article assesses the effects of isolation distances for transgenic maize in dairy...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries; Livestock Production/Industries.
Ano: 2011
URL: http://purl.umn.edu/114595

Dosagens de fósforo para cultivares de milho em terra roxa estruturada de Roraima.
Provedor de dados: 14
Autores: COUTO, W. S.; RIBEIRO, P. H. E.; ALVES, A. A. C.
bitstream/item/60090/1/CPATU-PA68.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Roraima; Brasil; Maize; Phosphate fertilizers.; Fertilizante Fosfatado; Milho; Produtividade; Superfosfato.; Amazonia; Superphosphate; Yields.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380614

Doses and forms of Azospirillum brasilense inoculation on maize crop
Provedor de dados: 91
Autores: Santini,José M. K.; Buzetti,Salatiér; Teixeira Filho,Marcelo C. M.; Galindo,Fernando S.; Coaguila,Daniel N.; Boleta,Eduardo H. M.
ABSTRACT In search of a more sustainable agriculture, the use of beneficial microorganisms has been highlighted, because they are low-cost and can reduce the use of fertilizers and increase grain yield. The present study aimed to evaluate the efficiency of A. brasilense inoculation and the best form and dose of inoculation in maize, measuring the impact on some physical characteristics and on its nutrition. The experiment was conducted in a greenhouse, in Ilha Solteira, SP, Brazil, in a completely randomized design, with four replicates and eight treatments: 1) control; 2) Seed 1x; 3) Seed 2x; 4) Soil 1x; 5) Soil 2x; 6) Leaf 1x; 7) Leaf 2x; 8) Seed 1x + Leaf 1x, respectively representing in each treatment the site and dose of application (1x, dose...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diazotrophic bacteria; Plant growth promoters; Plant nutrition; Zea mays L.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000600373

Downregulation of caffeoyl-CoA O-methyltransferase (CCoAOMT) by RNA interference leads to reduced lignin production in maize straw
Provedor de dados: 74
Autores: Li,Xiaoyu; Chen,Wenjuan; Zhao,Yang; Xiang,Yan; Jiang,Haiyang; Zhu,Suwen; Cheng,Beijiu.
Lignin is a major cell wall component of vascular plants that provides mechanical strength and hydrophobicity to vascular vessels. However, the presence of lignin limits the effective use of crop straw in many agroindustrial processes. Here, we generated transgenic maize plants in which the expression of a lignin biosynthetic gene encoding CCoAOMT , a key enzyme involved in the lignin biosynthesis pathway was downregulated by RNA interference (RNAi). RNAi of CCoAOMT led to significantly downregulated expression of this gene in transgenic maize compared with WT plants. These transgenic plants exhibited a 22.4% decrease in Klason lignin content and a 23.3% increase in cellulose content compared with WT plants, which may reflect compensatory regulation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CCoAOMT; Lignin biosynthesis; Lignin and cellulose content; Maize.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000400013

Downy mildew screening on S2 lines of Puerto Rico S1 lines of Thai composite white
Provedor de dados: 106
Autores: Virtucio, Robert H.
1 table
Palavras-chave: Corn; Maize; S1 lines; Puerto Rico; S2 lines; Thai composite white; Downy mildew; Screening; Disease resistance; ข้าวโพด; โรคราน้ำค้าง; ลูกเอส 1; เปอร์โตริโก; พันธุ์ผสมเปิดสีขาว.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3785

Dry matter accumulation in tropical flint corn
Provedor de dados: 106
Autores: Virtucio, Robert H.
2 table
Palavras-chave: Corn; Maize; Dry matter; Tropical flint corn; ข้าวโพด; น้ำหนักแห้ง; ข้าวโพดหัวแข็ง.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3789

Dry matter accumulation study
Provedor de dados: 106
Autores: Wiroreno, Otjo W.
1 table
Palavras-chave: Corn; Maize; Dry matter; ข้าวโพด; น้ำหนักแห้ง.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3788

Dry matter production and partitioning of maize hybrids and dwarf unes at four plant populations
Provedor de dados: 65
Autores: Sangoi,Luis; Salvador,Ricardo.
This experiment was conducted in Ames, Iowa, USA, to compare dry matter accumulation patterns of maize genotypes contrasting in height and leafiness, and to test whether reduction in plant height an leaf number through the use of dwarfing genes or earliness can improve grain dry matter allocation. Five plant genotypes were tested: a full season hybrid adapted to central lowa (NK 4525), a short season hybrid adapted to northern Minnesota (C1070), and three dwarf lines (156-A, 302-E and I17- A). The dwarves contained, respectively, the homozygous, independent, recessive dwarfing genes d3, d1 and br2. Each genotype was sown at four plant populations: 25, 50, 75 and 100.000 plants. ha-1. Hybrids had the greatest rates of decrease in total biomass and grain dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Plant height; Density; Harvest index.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781997000100001

Drying and quality features of selected maize varieties dried in commercial processing complexes
Provedor de dados: 111
Autores: Jony, Akhtaruzzaman.
The drying status and quality aspects in terms of physical, nutritional, functional properties and microbial status of three common maize varieties (900M gold, Pioneer 92 and Kavri) dried in different drying complexes in Dinajpur district of Bangladesh are presented in this paper. Total drying varied from18-20 h for drying of freshly harvested maize varieties in the complexes where sun drying method was used. The overall calculation reveled that drying cost in different mills ranged from US$12.12 to US$14.75 per ton of fresh maize (@1US$ equals Tk.80).  The dimensions of the maize varieties as length, width and thickness were found to be ranged from 12.62±0.34 to 14.54±0.32, 10.60±0.35 to 10.24±0.21, 6.38±0.28 to 6.74±0.28 mm, respectively. The 900M gold...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food Engineering and Technology Maize drying; Drying cost; Physical properties; Nutritional quality; Moisture content; Microbial load.
Ano: 2017
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3984

Düngung mit Sprossmasse von Futterleguminosen: Lachgasemissionen und Nitratverluste
Provedor de dados: 21
Autores: Stumm, Christoph; Köpke, Ulrich.
High nitrous oxide emissions are reported in literature when grass-clover is mulched in stockless farming systems. In our study, we measured similar emission rates especially after intensive rainfall when shoot biomass of grass-clover is transferred to maize and celeriac as a source of plant available nitrogen. Inefficient use of nitrogen bound in this mulch may furthermore result in nitrate leaching, especially if harvest is late and bare fallow over winter unavoidable.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality Cereals; Pulses and oilseeds Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31875/1/D%C3%BCngung%20mit%20Sprossmasse%20von%20Futterleguminosen.pdf

Dust in the wind &amp;#x2013; drift of dust containing insecticides &amp;#x2013; a risk for honey bees (_Apis mellifera_ L.)?
Provedor de dados: 17
Autores: Pablo T. Georgiadis; Jens Pistorius; Udo Heimbach.
In late April 2008, dust drift containing insecticide resulted in the largest bee poisoning in Germany for 30 years. The reason for these incidents was the contamination of flowering bee forage plants with dust particles abraded from maize seeds treated with Clothianidin recorded in the Upper Rhine Valley, Baden-Wuerttemberg and in parts of Bavaria during sowing of maize.&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;Clothianidin, an insecticidal active substance from the group of neonicotinoids, works as agonist at the nicotinic acetylcholine receptors with broad spectrum of efficacy. Clothianidin is also used as a seed dressing of maize (agent for seed treatment &amp;#x201c;Poncho Pro&amp;#xae;&amp;#x201d;; 1,.25 mg a.i. Clothianidin./kernel) for the control of the...
Tipo: Presentation
Palavras-chave: Chemistry; Plant Biology.
Ano: 2011
URL: http://precedings.nature.com/documents/5738/version/1

Dynamics in trade streams in international food supply networks. The case of fresh produce, meat, and cereals
Provedor de dados: 31
Autores: Deiters,   Jivka; Fritz,   Melanie.
The identification of the most relevant agri-food trade streams serves as the foundation and shows the trading volume in selected countries on which the later research of project e-Trust is based, with particular consideration of the specific role of trust in these transactions and its transfer in e-commerce afterwards. For the elaboration of the data collection, mainly the international statistical database of Food and Agriculture Organization of the United Nations (FAOSTAT) is used as a common basis of the comparison. The procedure has been applied to six European traders in agricultural products (Germany, Austria, Italy, Slovenia, Greece and Spain) and three non-European countries (USA, Brazil and Turkey). According to the statistical sources mentioned...
Tipo: Conference Paper or Presentation
Palavras-chave: Trade streams; Dynamics; E-commerce; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Food Consumption/Nutrition/Food Safety; Labor and Human Capital.
Ano: 2010
URL: http://purl.umn.edu/95022

Early colonization pattern of maize (Zea mays L. Poales, Poaceae) roots by Herbaspirillum seropedicae (Burkholderiales, Oxalobacteraceae)
Provedor de dados: 74
Autores: Monteiro,Rose A.; Schmidt,Maria A.; Baura,Valter A. de; Balsanelli,Eduardo; Wassem,Roseli; Yates,Marshall G.; Randi,Marco A.F.; Pedrosa,Fábio O.; Souza,Emanuel M. de.
The bacterium Herbaspirillum seropedicae is an endophytic diazotroph found in several plants, including economically important poaceous species. However, the mechanisms involved in the interaction between H. seropedicae and these plants are not completely characterized. We investigated the attachment of Herbaspirillum to maize roots and the invasion of the roots by this bacterium using H. seropedicae strain SMR1 transformed with the suicide plasmid pUTKandsRed, which carries a mini-Tn5 transposon containing the gene for the Discosoma red fluorescent protein (Dsred) constitutively expressed together with the kanamycin resistance gene. Integration of the mini-Tn5 into the bacterial chromosome yielded the mutant H. seropedicae strain RAM4 which was capable of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Confocal microscopy; Diazotroph; Endophytic; Herbaspirillum seropedicae.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500021

Early indirect selection for nitrogen use efficiency in maize1
Provedor de dados: 124
Autores: Caixeta,Débora Santos; Fritsche-Neto,Roberto; Granato,Ítalo Stefanine Correia; Oliveira,Lucimar Rodrigues de; Galvão,João Carlos Cardoso.
Several studies to evaluate nitrogen use efficiency (NUE) have been carried out using early growth stages. However, there are no scientific reports on the ideal stage for evaluation and on which characteristics have the highest correlation with the NUE at that stage. The aim therefore was to identify the phenological stages and secondary characteristics which maximize accuracy in early indirect selection for NUE in maize. To do this, three endogamic maize strains were evaluated in a completely randomised design with five replications, in a triple factorial scheme (strains x N levels x phenological stage), at two contrasting nitrogen levels: low and high nitrogen. The plants were evaluated at five growth stages: stage nine (V9), with 14 fully-developed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Path analysis; Abiotic stress; Plant breeding.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200369

Early maize root and phosphorus uptake responses to localised application of sewage sludge derived fertilisers
Provedor de dados: 21
Autores: Lemming, Camilla; Oberson, Astrid; Hund, Andreas; Stoumann Jensen, Lars; Magid, Jakob.
Background: Phosphorus recycling from waste and localised placement of fertilisers can be means to improve sustainable P management in agriculture. However, knowledge about root and plant P uptake responses to placement of complex waste- derived fertilisers is lacking.  Methods: Sewage sludge (SS) and sewage sludge ash (ASH) were tested against triple superphosphate (TSP) in a rhizobox setup where shoot and root growth of maize was followed for 30 days. The three P sources were either mixed homogenously into the soil (labelled with 33P) or localised in a patch close to the seed.  Results: While localised TSP and SS both increased root length density around the fertiliser patch, it was at the expense of the remaining root system and soil P uptake for SS....
Tipo: Journal paper
Palavras-chave: Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/29273/7/29273.pdf

Economic analysis of adopting new technology of corn production, first planting season, 1976
Provedor de dados: 106
Autores: Supranee Wang; Worathep Nakapraving; Chana Chantchaimongkol.
19 tables
Palavras-chave: Corn; Maize; Economic analysis; Production technology; Yields; Production costs; ข้าวโพด; การวิเคราะห์ทางเศรษฐศาสตร์; เทคโนโลยีการผลิต.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3884

Economic Analysis of Alternative Maize Storage Technologies in Kenya
Provedor de dados: 31
Autores: Kimenju,   Simon Chege; De Groote,   Hugo.
Upcoming technologies for maize storage have sometimes been promoted without being subjected to trials and economic analysis. In the recent past, new storage technologies, actellic super, super grain bag and the metal silo have been developed. In this paper, the results of crop loss trials are combined with measures of project worth to determine the attractiveness of investing in new storage technologies. Determination of the benefit was based on the amount of loss the new technology could abate. A one ton metal silo, with negligible % crop loss abated USD 100 in 12 months. These benefits were found to increase with time meaning that a farmer benefits by storing longer. Measures of project worth, the NPV and BCR were used to analyze the attractiveness of...
Tipo: Journal Article
Palavras-chave: Storage; LGB; Economic analysis; Kenya; Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/96419

Economic analysis of corn production under agribusiness integration project in 1989-90 crop year
Provedor de dados: 106
Autores: Sanit Kao-ian; Sarun Wattanutchariya.
10 tables
Palavras-chave: Corn; Maize; Production; Economic analysis; Agribusiness integration project; Farm input and return; ข้าวโพด; การผลิต; ธุรกิจเกษตร; การวิเคราะห์ทางเศรษฐศาสตร์.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4381

Economic analysis of corn production under agribusiness integration project in Prachinburi Province in 1989/90 crop year
Provedor de dados: 106
Autores: Sarun Wattanutchariya; Sanit Kao-ian; Vanlapa Vichachai.
12 tables
Palavras-chave: Corn; Maize; Production; Economic analysis; Agribusiness integration project; Farm input and return; ข้าวโพด; การผลิต; ธุรกิจเกษตร; การวิเคราะห์ทางเศรษฐศาสตร์.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4314

Economic analysis of corn production under different cultural practices
Provedor de dados: 106
Autores: Sarun Wattanutchariya; Sanit Kao-ian.
8 tables
Palavras-chave: Corn; Maize; Economic analysis; Costs; Profitability; Cultural practices; Corn production; Seed; Land preparation; Planting methods; Fertilizers; Herbicides; Insecticides; Thinning; Labor requirement; ข้าวโพด; การวิเคราะห์เศรษฐกิจ; การเพาะปลูก; การผลิต.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4154

Economic analysis of corn seed production in Thailand
Provedor de dados: 106
Autores: Sarun Wattanutchariya.
5 tables
Palavras-chave: Corn; Maize; Seed production; Economic analysis; ข้าวโพด; เมล็ดพันธุ์; การผลิต; การวิเคราะห์ทางเศรษฐศาสตร์.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4272

Economic analysis of hybrid and open pollinated corn production
Provedor de dados: 106
Autores: Sarun Wattanutchariya; Sanit Kao-ian; Mana Vonyordpun.
10 tables
Palavras-chave: Corn; Maize; Corn production; Corn hybrids; Open pollinated variety; Economic analysis; ข้าวโพด; ลูกผสม; ผลผลิต; การวิเคราะห์ทางเศรษฐศาสตร์.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4438

Economic analysis of maize production in Chiang Rai Province 1991/92 crop year
Provedor de dados: 106
Autores: Sarun Wattanutchariya; Sanit Kao-ian; Somsak Kitirattarkarn.
8 tables
Palavras-chave: Corn; Maize; Production; Economic analysis; ข้าวโพด; การผลิต; การวิเคราะห์ทางเศรษฐศาสตร์.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4511

Economic Analysis of Phosphorus Applications under Variable and Single-Rate Applications in the Bothaville District
Provedor de dados: 31
Autores: Maine,   Ntsikane; Nell,   Wilhelm T.; Lowenberg-DeBoer,   James; Alemu,   Zerihun Gudeta.
Variable-rate (VR) application of inputs in South African cash crop production is mainly concerned with fertilizer and lime, and this indicates the importance of these inputs in cash crop production. However, the profitability of VR application of inputs has not yet been investigated under South African conditions. This paper studies the maize yield response to variable-rate application of phosphorus (P) and the profitability thereof in South Africa, on the basis of data collected on a 104-hectare experimental field on a farm in the Bothaville district. The strip-plot design of 180 strips was used for this on-farm research experiment. This design involved treatments that run in the same direction across the field as planting and harvesting. The objective...
Tipo: Journal Article
Palavras-chave: Precision agriculture; Precision farming; Site-specific phosphorus management; Variable-rate application; Fertilizer; Yield response; South Africa; Crop Production/Industries.
Ano: 2007
URL: http://purl.umn.edu/7047

Economic analysis of seed application of corn and sorghum at farm level
Provedor de dados: 106
Autores: Sarun Wattanutchariya; Amnart Teeravanich.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Economic analysis; Varieties; Plant production; ข้าวโพด; ข้าวฟ่าง; การวิเคราะห์ทางเศรษฐกิจ; การผลิตพืช; การปฏิบัติของเกษตรกร.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4078

Economic analysis of young ear corn production in Thailand
Provedor de dados: 106
Autores: Sarun Wattanutchariya; Sanit Kao-ian.
11 tables
Palavras-chave: Corn; Maize; Young ear corn production; Economic analysis; ข้าวโพด; ข้าวโพดฝักอ่อน; การผลิต; การวิเคราะห์ทางเศรษฐศาสตร์.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4273

Economic and livelihood impacts of maize research in hill regions in Mexico and Nepal: Including a method for collecting and analyzing spatial data using Google Earth
Provedor de dados: 31
Autores: La Rovere,   Roberto; Mathema,   Sudarshan; Dixon,   John; Aquino-Mercado,   Pedro; Gurung,   Kamala; Hodson,   Dave P.; Flores Velasquez,   Dagoberto.
Tipo: Report
Palavras-chave: Economic impact; Livelihood Impacts; Maize; Hill Regions; Mexico; Nepal; Spatial Analysis; Google EarthTM; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009
URL: http://purl.umn.edu/56090

ECONOMIC ASPECTS OF SOYBEAN PRODUCTION AND MARKETING IN INDONESIA
Provedor de dados: 31
Autores: Pakasi,   Piet Petrus.
Indonesia is a great archipelago, consisting of five main islands and about 13,000 smaller ones.  Topographical features and soil types can be classified into three major groupings:  1) mountainous land area, 2) level or undulating to hilly land, and 3) low swampy lands.   Indonesia is the fifth most populous country in the world after China, India, Russia, and the United States of America.  It is predominantly a rural society, as well as an agricultural country.  Agricultural policy has emphasized intensification, extensification, diversification and rehabilitation.  This policy has been supported by the development of better irrigation schemes, improved on-farm water management, implementation of special intensification packages and increased labor...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries.
Ano: 1988
URL: http://purl.umn.edu/11041

ECONOMIC EFFECTS OF CO-EXISTENCE MEASURES IN MAIZE CROP AND SEED PRODUCTION - A CASE STUDY OF FRANCE
Provedor de dados: 31
Autores: Reitmeier,   Daniela; Menrad,   Klaus; Gomez-Barbero,   Manuel; Angevin,   F.; Messean,   A.; Rodriguez-Cerezo,   Emilio.
Paper prepared for presentation at the Second International Conference on Coexistence between Genetically Modified (GM) and non-GM based Agricultural Supply Chains (GMCC) Montpellier (France), 14th and 15th November 2005
Tipo: Conference Paper or Presentation
Palavras-chave: Genetic engineering; GMO; Maize; Co-existence; Agricultural and Food Policy; L51; O32.
Ano: 2005
URL: http://purl.umn.edu/91124

Economic Evaluation of Organic and Inorganic Resources for Recapitalizing Soil Fertility in Smallholder Maize-based Cropping Systems of Central Kenya
Provedor de dados: 31
Autores: Ramisch,   J.; Nyikal,   Rose Adhiambo; Kimenye,   L.N.; Kimani,   Stephen K.; Macharia,   Jm.
Structural adjustments programs (SAPs) in the last two decades have eliminated all farm-support programs leading to low usage of fertilizers by Kenyan smallholders. One way of addressing this problem is use of organic nutrient resources. This paper examines their cost-effectiveness as capital investments in replenishment of Nitrogen (N), Phosphorus (P), Potassium (K) and soil organic matter (SOM) in smallholder, Maize-based cropping systems. On-farm trials were established in Maragwa and Kirinyaga Districts in 2003/04. Maize was planted in 3 replicates in randomised complete block design (RCBD) using different levels of organic and inorganic fertilizer resources. A blanket rate of 40kg P/ha was applied in all treatment except the control to increase...
Tipo: Conference Paper or Presentation
Palavras-chave: Natural resource capital; Net present values (NPV); Nutrient budgets; Smallholder farmers; Soil organic matter (SOM); Structural adjustment programs (SAPs); Crop Production/Industries; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/25780

Economic gains from crop-livestock integration in relation to conventional systems
Provedor de dados: 96
Autores: Mendonça,Gabriela Geraldi; Simili,Flávia Fernanda; Augusto,Jeferson Garcia; Bonacim,Pedro Mielli; Menegatto,Leonardo Sartori; Gameiro,Augusto Hauber.
ABSTRACT The objective with this study was to calculate the total cost of maize production and beef cattle in permanent pasture activities in separate production systems (conventional) and integrated systems (maize production plus beef cattle), as well as to verify economic gains explained by the economy of scope. The first step for the development of the research was to obtain field experimental data. Six experimental treatments were studied: corn grain production, beef cattle in permanent pasture, and four integrated systems based on different crop and pasture sowings. The second step consisted in the collection, calculation, and allocation of variable and fixed costs to estimate costs of production in the systems. The crop-livestock integration showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Economic analysis; Economy of scope; Integrated systems.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982020000100101

Economic impacts of soil fertility management research in West Africa
Provedor de dados: 31
Autores: Akinola,   Adebayo A.; Alene,   Arega D.; Adeyemo,   Remi; Sanogo,   Diakalia; Olanrewaju,   Adetunji S.
This paper assesses the potential economic impacts of balanced nutrient management systems technology options: BNMS-manure, which combines inorganic fertilizer and organic manure, and BNMS-rotation, which is maize–soybean rotation, in maize-based systems in the northern Guinea savanna areas of Nigeria, Ghana, Togo and Benin. The economic surplus analysis suggested that BNMS-manure research and extension could achieve returns ranging from 17 to 25% and a maximum adoption of 24 to 48%, for the conservative and base scenario respectively; and that BNMS-rotation research and extension could achieve returns ranging from 35 to 43% and a maximum adoption of 20 to 40%, for the conservative and base scenario respectively. Our results were consistent with earlier...
Tipo: Journal Article
Palavras-chave: Balanced nutrient management systems; BNMS-manure; BNMS-rotation; Economic surplus; Northern Guinea savanna; West Africa; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009
URL: http://purl.umn.edu/56932

Economic Parameter of Maize Sheller for Custom Hire Service in Bangladesh
Provedor de dados: 111
Autores: Milufarzana, Milufarzana; Rahman, Anisur; Alam, Md. Monjurul; Ahmed, Md. Raju.
The main purpose of the study was to determine the economic parameters for developing a maize sheller custom hire entrepreneur and effective schedules for maize sheller operation. Secondary data from various sources and some essential data were collected from primary sources through survey were used in this study. Operating costs were calculated and project financial profitability was determined by farm financial measurement techniques namely, benefit-cost ratio (BCR) and break even use. The operating cost of maize sheller for shelling was found US$ 3.4 per hour or US$ 1.41 per ton. Based on the operating cost, annual savings for replacement and a profit margin for the entrepreneur, the rent-out charge of the maize sheller is estimated as US$ 8.15 per hour...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Farm Machinery maize sheller operating cost; Economic parameter; Maize sheller entrepreneur; Bangladesh.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3205

Economic profitability of crop rotation systems in the Caiuá sandstone area
Provedor de dados: 65
Autores: Volsi,Bruno; Bordin,Ivan; Higashi,Gabriel Eiji; Telles,Tiago Santos.
ABSTRACT: Even in areas of predominance of Caiuá sandstone, with soils of low natural fertility that are highly susceptible to erosion and degradation processes, farmers have adopted systems with little diversification, because they believe that they provide a greater economic return. However, agricultural practices such as crop rotation can bring agronomic benefits in terms of conservation agriculture, in addition to economic gains, circumventing edaphoclimatic difficulties in the region. In this context, the objective of this study is to verify whether no-till crop rotation systems are economically profitable, in a Caiuá sandstone area in the northwest region of the Brazilian state of Paraná. To this end, an experiment was conducted in the municipality...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cost analysis; Agricultural production; Agricultural economy; Rural administration; Conservation agriculture.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000200931

Economics of Co-Existence Measures of GM and Conventional Maize in Spain and Germany
Provedor de dados: 31
Autores: Petzoldt,   Marina; Menrad,   Klaus; Reitmeier,   Daniela.
Paper prepared for presentation at the Third International Conference on Coexistence between Genetically Modified (GM) and non-GM based Agricultural Supply Chains (GMCC) Seville (Spain), 20th and 21st November 2007
Tipo: Conference Paper or Presentation
Palavras-chave: Genetically Modified Organisms; Agriculture; Co-Existence; Agricultural and Food Policy; Farm Management; Land Economics/Use.
Ano: 2007
URL: http://purl.umn.edu/62002

Economics of Insecticide use and Potential for Bt Maize Varieties in the Control of Stalkborer in Kenya.
Provedor de dados: 31
Autores: Wanyama,   Joseph M.; De Groote,   Hugo; Mose,   Lawrence Obae; Odendo,   Martins; Ouma,   James Okuro; Owuor,   George; Lutta,   M.; Ndung'U,   J.; Mutoko,   M.C.
Maize is the staple food crop and source of income for majority of the Kenyan population and many sub-Saharan African countries.  The increasing Kenyan population demands an increase in maize production if intermittent food deficits have to be averted.  Since the introduction of improved maize varieties in mid-1960, the start of Green Revolution period, maize yields increased drastically up to 1970s and started declining from 1980’s to-date. The key contributory factors are nutrient mining, sub-optimal input use and insect pest damage. Of the insect pests, stalk borer is of economic importance.  Currently, KARI and CIMMYT are developing maize varieties that are tolerant to stalk borer damage. In order to evaluate the potential impact of these interventions...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2004
URL: http://purl.umn.edu/9526

ECONOMICS OF MAIZE PRODUCTION UNDER DIFFERENT COWPEA-BASED GREEN MANURE PRACTICES IN DERIVED SAVANNA ZONE OF NIGERIA
Provedor de dados: 21
Autores: Fabunmi, Thomas. O.; Agbonlahor, Mure. U.
There is a challenge in Nigeria of how to sustainably increase land productivity in the face of land pressures, un-availability and/or high cost of fertilizers, and reduced fallow periods. The present study analyzed the economic potential of producing maize under different regimes of cowpea green manure cropping.
Tipo: Journal paper
Palavras-chave: Composting and manuring; Africa.
Ano: 2012
URL: http://orgprints.org/21788/7/21788.pdf

ECONOMIES OF SCALE AND SCOPE, AND THE ECONOMIC EFFICIENCY OF CHINA'S AGRICULTURAL RESEARCH SYSTEM
Provedor de dados: 31
Autores: Jin,   Songqing; Alston,   Julian M.; Rozelle,   Scott; Huang,   Jikun.
Faced with the task of reorganizing the largest agricultural research system in the world, officials in China are developing a strategy for reform.  This paper investigates economies of scale and scope and other potential sources of improvements in the economic efficiency of crop breeding, an industry at the heart of the nation's food economy.  Using a panel data set covering 46 wheat and maize breeding institutes from 1981 to 2000, we estimate both single output and multiple output cost functions for the production of new varieties at China's wheat and maize breeding institutes.  Our descriptive and analytical results indicate strong economies of scale, along with small to moderate economies of scope related to the joint production of new wheat and maize...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural and Food Policy; Industrial Organization.
Ano: 2003
URL: http://purl.umn.edu/22088

Ecosystem service trade-offs, perceived drivers, and sustainability in contrasting agroecosystems in central Mexico
Provedor de dados: 7
The ability of agroecosystems to provide food ultimately depends on the regulating and supporting ecosystem services that underpin their functioning, such as the regulation of soil quality, water quality, soil erosion, pests, and pollinators. However, there are trade-offs between provisioning and regulating or supporting services, whose nature at the farm and plot scales is poorly understood. We analyzed data at the farm level for two agroecosystems with contrasting objectives in central Mexico: one aimed at staple crop production for self-subsistence and local markets, the other directed to a cash crop for export markets. Bivariate and multivariate trade-offs were analyzed for different crop management strategies (conventional, organic, traditional, crop...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agroecosystems; Avocado; Ecosystem services; Maize; Mexico; Trade-offs.
Ano: 2015

Ecotoxicological risk assessment of agriculture intensification in Argentinean cropping lands using a fuzzy-logic based model
Provedor de dados: 17
Autores: Diego Ferraro.
Current agricultural models have an increasing dependence on non-renewable resources that have significant implications for the ecosystem health. Pesticides are considered one main impact force that affects both the structure and functions of agroecosystems. In this work we presented results from the application of an environmental pesticide risk assessment of a large database of cropping systems in the Inland Pampa (Argentina) where, since 1990, the traditional mixed grazing&amp;#x2013;cropping systems were being replaced by permanent agriculture and the intensification of pesticide use has increased significantly. However, there is no clear awareness of the ecotoxicological risk associated with these land use changes. The ecotoxicological risk on both...
Tipo: Poster
Palavras-chave: Ecology.
Ano: 2010
URL: http://precedings.nature.com/documents/5215/version/1

Edafofauna como indicador de calidad en un suelo cumulic phaozem sometido a diferentes sistemas de manejos en un experimento de larga duración.
Provedor de dados: 32
Autores: Chocobar Guerra, Eneyda Andrea.
Los organismos del suelo contribuyen en la formación y los cambios de la estructura física del suelo e influyen en la dinámica de los nutrientes por sus efectos sobre la inmovilización y humificación de la materia orgánica. Por lo anterior, es importante estudiar la edafofauna en sistemas de larga duración (15 años) porque repercute de manera directa en el rendimiento de los cultivos y en el mejoramiento del suelo. Estas cualidades además pueden ser empleadas para crear indicadores biológicos de calidad del suelo, con el objeto de potenciar manejos agrícolas con tendencias sustentables. La investigación se enfocó en clasificar (grupo taxonómico), cuantificar (Nº individuos m-2) medir biomasa (gramos m-2) y evaluar la variación poblacional de la edafofauna...
Palavras-chave: Indicadores biológicos; Labranza; Rotación; Residuos; Biological indicator; Tillage; Crop rotation; Residues; Maestría; Edafología.
Ano: 2010
URL: http://hdl.handle.net/10521/317

Efecto ambiental y económico-social por la aplicación de biosólidos de origen urbano como mejoradores de suelos agrícolas.
Provedor de dados: 32
Autores: González Flores, Eduardo.
La generación y disposición final de los biosólidos producidos en las plantas de tratamiento de aguas residuales, es un grave problema ambiental. La aplicación en suelos agrícolas es una opción viable por su contenido de materia orgánica, N, P y micronutrimentos. La principal restricción es su contenido de metales pesados. En la ciudad de Puebla de Zaragoza, México, los biosólidos generados se aplican en suelos agrícolas de comunidades rurales cercanas. Los suelos son delgados y de baja productividad y se cultiva principalmente maíz. El objetivo del presente trabajo fue evaluar los efectos ambientales, económicos y sociales producidos por la aplicación de biosólidos en los agroecosistemas de la comunidad La Paz Tlaxcolpan, Puebla. Se tomaron muestras de...
Palavras-chave: Metabolismo social; Biodisponibilidad; Biosólidos; Metales pesados; Agroecosistema; Social metabolism; Bioavailability; Biosolids; Heavy metals; Agroecosystem; Doctorado; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2011
URL: http://hdl.handle.net/10521/531

Efecto ambiental y económico-social por la aplicación de biosólidos de origen urbano como mejoradores de suelos agrícolas.
Provedor de dados: 32
Autores: González Flores, Eduardo.
La generación y disposición final de los biosólidos producidos en las plantas de tratamiento de aguas residuales, es un grave problema ambiental. La aplicación en suelos agrícolas es una opción viable por su contenido de materia orgánica, N, P y micronutrimentos. La principal restricción es su contenido de metales pesados. En la ciudad de Puebla de Zaragoza, México, los biosólidos generados se aplican en suelos agrícolas de comunidades rurales cercanas. Los suelos son delgados y de baja productividad y se cultiva principalmente maíz. El objetivo del presente trabajo fue evaluar los efectos ambientales, económicos y sociales producidos por la aplicación de biosólidos en los agroecosistemas de la comunidad La Paz Tlaxcolpan, Puebla. Se tomaron muestras de...
Palavras-chave: Metabolismo social; Biodisponibilidad; Biosólidos; Metales pesados; Agroecosistema; Social metabolism; Bioavailability; Biosolids; Heavy metals; Agroecosystem; Doctorado; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2011
URL: http://hdl.handle.net/10521/531

Efecto de la aplicación de compost de cachaza y fertilizante químico en suelos calcáreos en la corrección de clorosis férrica y rendimiento de sorgo.
Provedor de dados: 32
Autores: Cortez Hernández, Graciano.
En la Mixteca Poblana, predominan suelos calcáreos que por su pH alcalino impiden que las plantas puedan absorber los nutrimentos como hierro y zinc, ocasionando la clorosis férrica, afectando los cultivos de esta región, tales como: caña de azúcar, sorgo, maíz, frijol e incluso los árboles frutales, repercutiendo en el desarrollo, rendimiento y en casos severos la muerte de la planta. En esta región está ubicado el ingenio azucarero de Atencingo que genera anualmente 45 mil toneladas de desechos orgánicos (cachaza). El objetivo de esta investigación fue evaluar el efecto de la incorporación de compost de cachaza al suelo en la corrección de clorosis férrica y rendimiento de sorgo. Se incorporó compost de cachaza a razón de cero, cinco y diez t ha-1 en...
Palavras-chave: Dosis de fertilización; Compost de cachaza; Deficiencia; Nutrimentos; Fertilización orgánica; Dose of fertilization; Compost; Filter cake; Deficiency; Nutrients; Organic fertilizer; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/335

Efecto de la aplicación de vermicomposta en la mitigación del estrés hídrico en plantas tipo C3 y C4.
Provedor de dados: 32
Autores: Aguilar Benítez, Gisela.
Se ha evidenciado que la vermicomposta puede mejorar la germinación y el crecimiento y productividad de las plantas; sin embargo, su efecto combinado con déficit de humedad ha sido escasamente documentado. El objetivo de esta investigación fue evaluar el efecto de la vermicomposta en la germinación, crecimiento inicial y rendimiento en plantas C3 y C4, con déficit de humedad en el suelo. En laboratorio se evaluó la germinación de dos cultivares de frijol y dos de maíz, con respuesta contrastante a sequía, en suelo sin y con 1.5, 3, 6 y 9 % de vermicomposta, y con potenciales de agua (ΨA) de -0.03 y -2 MPa; en invernadero se cuantificó el intercambio de gases y crecimiento de maíz, así como algunos componentes del rendimiento de frijol, en suelo sin y con...
Palavras-chave: Estrés; Floración; Semilla; Germinación; Uso eficiente del agua; Stress; Flowering; Seeds; Germination; Water use efficiency; Doctorado; Botánica.
Ano: 2011
URL: http://hdl.handle.net/10521/452

Efecto de la aplicación de vermicomposta en la mitigación del estrés hídrico en plantas tipo C3 y C4.
Provedor de dados: 32
Autores: Aguilar Benítez, Gisela.
Se ha evidenciado que la vermicomposta puede mejorar la germinación y el crecimiento y productividad de las plantas; sin embargo, su efecto combinado con déficit de humedad ha sido escasamente documentado. El objetivo de esta investigación fue evaluar el efecto de la vermicomposta en la germinación, crecimiento inicial y rendimiento en plantas C3 y C4, con déficit de humedad en el suelo. En laboratorio se evaluó la germinación de dos cultivares de frijol y dos de maíz, con respuesta contrastante a sequía, en suelo sin y con 1.5, 3, 6 y 9 % de vermicomposta, y con potenciales de agua (ΨA) de -0.03 y -2 MPa; en invernadero se cuantificó el intercambio de gases y crecimiento de maíz, así como algunos componentes del rendimiento de frijol, en suelo sin y con...
Palavras-chave: Estrés; Floración; Semilla; Germinación; Uso eficiente del agua; Stress; Flowering; Seeds; Germination; Water use efficiency; Doctorado; Botánica.
Ano: 2011
URL: http://hdl.handle.net/10521/452

Efecto de la biota edáfica en la fertilidad del suelo en el sistema milpa intercalada con árboles frutales (MIAF).
Provedor de dados: 32
Autores: Juárez Ramón, Dionicio.
En el sistema de cultivo Milpa Intercalada con Árboles Frutales (MIAF) más pobre en organismos del suelo y de menores contenidos de nutrientes para los cultivos, seleccionado mediante caracterización biológica y fisicoquímica de 8 MIAF ubicados en Huejotzingo-Chiautzingo, Pue. y en San Jerónimo Tecoatl, Oaxaca, se realizó un experimento de campo en Chiautzingo, empleando técnicas de bioestimulación (aplicación de enmiendas orgánicas: alfalfa cortada de la misma parcela, chícharo cultivado in situ y estiércol de vacuno) y de bioaumentación (inoculación de las lombrices de tierra: Lumbricus rubellus Hoffmeister, 1843 y Aporrectodea trapezoides Dugès, 1828, epigea y endógea, respectivamente), sobre el suelo cultivado con árboles de durazno, para evaluar sus...
Palavras-chave: Alley cropping; Inoculation; Soil biodiversity; Soil fertility; Sustainable agriculture; Agricultura sostenible; Biodiversidad del suelo; Fertilidad del suelo; Inoculación; MIAF; Estrategias para el Desarrollo Agrícola Regional; EDAR; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/1829

Efecto de la cobertura vegetal y raíces en la erosión del suelo
Provedor de dados: 32
Autores: Huerta Olague, José de Jesús.
Se avaluó el efecto de la cobertura vegetal y de las raíces, de maíz (Zea mays L.), frijol (Phaseolus vulgaris L.), calabacita (Cucurbita pepo L.) y avena (Avena sativa L.), sobre el escurrimiento superficial y la perdida del suelo. El trabajo se realizo en un campo experimental de la Universidad Autónoma Chapingo y se utilizaron 8 tratamientos, 2 para cada cultivo (4 fueros subparcelas con cobertura vegetal y 4 subparcelas sin cobertura y solo con raíces, mismas que resultaron de cortar al ras del suelo los cultivos estudiados. La cobertura vegetal se midió en porcentajes y el sistema radical en densidad longitudinal de raíces (DLR). Se aplicó lluvia simulada a los 15, 30, 50 y 65 días de desarrollo sobre lotes de escurrimiento de 1 metro cuadrado y 10%...
Tipo: Tesis
Palavras-chave: Escurrimiento superficial; Pérdida de suelo; Cobertura vegetal; Raíces; Maestría; Hidrociencias; Surface runoff; Soil loss; Vegetative cover; Roots.
Ano: 2007
URL: http://hdl.handle.net/10521/1271

Efecto de labranza, manejo de rastrojo y fertilización de nitrógeno sobre el contenido de humedad y desarrollo del cultivo de trigo.
Provedor de dados: 32
Autores: Osorio Hernández, Victorino.
Se estudió la influencia que ejercen los residuos, el efecto de los diferentes tipos de labranza y la fertilización, sobre el contenido de humedad, desarrollo y rendimiento de trigo. Se incluyen resultados de dos ensayos, localizados en la parte noroeste de México, en el Centro Experimental Norman E. Borlaug en un suelo Chromic Haplotorrert (Hyposodic Vertisol (Calcaric, Chromic)), bajo en materia orgánica (&lt;1%), en condiciones semi-áridas. Se comparan prácticas agronómicas que difieren en tipo de labranza (camas permanentes y camas convencionales), manejo de rastrojo (dejar, empacar o quemar), dosis de fertilización de N bajo diferentes regímenes de riego y con rotación maíz-trigo. Se midieron el contenido de humedad en el perfil (0-60 cm) antes y...
Palavras-chave: Agricultura de conservación; Cama permanente; Manejo de residuos; Conservation agriculture; Permanent beds; Straw management; Maestría; Hidrociencias.
Ano: 2011
URL: http://hdl.handle.net/10521/355

Efecto de procampo sobre la producción y las importaciones de granos forrajeros en México.
Provedor de dados: 32
Autores: Molina Gómez, Jorge Nery.
Para medir los efectos PROCAMPO sobre la producción e importaciones de maíz (Zea mays L.) y sorgo (Sorghum bicolor L. Moench) se estimaron dos funciones de oferta usando series de 1980 a 2009, y se construyó un sistema de ecuaciones en el año 2007/2009.  Los resultados indican que el maíz y el sorgo tienen una respuesta inelástica ante el pago de PROCAMPO con elasticidades de 0.24 y 0.22 para maíz y sorgo. Si PROCAMPO no hubiera existido, la producción de maíz y sorgo hubiera sido menor en 17 y 9.1%, respecto al nivel observado en 2007/2009. Un aumento de 50% en el pago de PROCAMPO aumentaría la producción de maíz y sorgo en 1,924 y 286 mil toneladas, y disminuiría las importaciones en esa cantidad. La evolución de los precios internacionales del sorgo y...
Palavras-chave: Modelo de ecuaciones simultáneas; TLCAN; Importaciones; Simultaneous equation model; NAFTA; Imports; Economía; Maestría; Zea mays; Sorghum bicolor.
Ano: 2012
URL: http://hdl.handle.net/10521/671

Efecto del cambio climático en los mercados de maíz (Zea mays L.) y sorgo (Sorghum vulgare) en México.
Provedor de dados: 32
Autores: Caamal Pat, Zulia Helena.
La incertidumbre del cambio climático y sus efectos en la agricultura llevan a los productores de granos forrajeros a buscar cultivos con mayor tolerancia a las condiciones climáticas observadas. El objetivo de este estudio fue medir el efecto del cambio climático en los mercados de maíz y sorgo en México, para lo cual se construyó un modelo Armington para el periodo 2008/2010. Los resultados obtenidos mostraron que un cambio en el rendimiento de maíz; a causa de los cambios en la temperatura y precipitación en México durante el cultivar de maíz, incrementará las importaciones de maíz y sorgo, y los precios de importación aumentarán aproximadamente en la misma proporción para ambos cultivos. Si los rendimientos de sorgo disminuyeran debido al cambio...
Palavras-chave: Importación; Modelo Armington; Precio; Rendimiento; Valor comercial; Imports; Armington model; Yield; Price; Commercial value; Economía; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2365

Efecto del clorhidrato de ractopamina en el comportamiento productivo y características de carne de ovinos en finalización.
Provedor de dados: 32
Autores: Romero Maya, Angel Martín.
Se realizó un estudio con el objetivo de evaluar el comportamiento productivo y características de la canal de ovinos Suffolk x Hampshire y Pelibuey al adicionar clorhidrato de ractopamina (RAC) en la dieta de corderos en la etapa de finalización. Se realizaron dos experimentos, en el primero se utilizaron 20 corderos machos Suffolk x Hampshire (S x H) con un peso inicial promedio de 37.01 ± 1.04 kg, y en el segundo 28 corderos machos Pelibuey (PB) con un peso inicial promedio 28.37 ± 0.66 kg. La prueba de engorda en corral fue de 45 días con un periodo de finalización de 30 días. Los corderos se alojaron en corraletas con comedero y bebedero individual, el alimento se ofreció a las 08:00 y 16:00 horas y el agua a libre acceso. El RAC se administró en la...
Palavras-chave: Ovinos; Ractopamine; Pelibuey; Suffolk x Hampshire; Lambs; Ganadería; Doctorado.
Ano: 2011
URL: http://hdl.handle.net/10521/600

Efecto del Nim (Azadirachta indica) (A. Juss) en el desarrollo biológico y el metabolismo del gusano cogollero (Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) en maíz
Provedor de dados: 32
Autores: Gutiérrez García, Socorro del Carmen.
En el gusano cogollero Spodoptera frugiperda  (Smith) está documentado que los efectos subletales que Azadirachta indica ocasiona en poblaciones de este insecto ha sido la inhibición de la alimentación, efectos en el metabolismo del insecto y alteraciones en el desarrollo biológico; sin embargo,  no está cuantificado en qué magnitud ocurren estas alteraciones (Li, et al. 2003). Con el presente estudio se planteó  dar respuesta a estas interrogantes, a partir de los siguientes objetivos: 1) Analizar las alteraciones en el desarrollo biológico de larvas y pupas de Spodoptera frugiperda (Smith) causadas por el consumo de A. indica, 2) Determinar y cuantificar el efecto del consumo de A. indica en el metabolismo de S. frugiperda (Smith) y 3) Medir el control...
Palavras-chave: Efectos subletales; Costo metabólico; Azadirachta indica extractos acuosos; Daño foliar en maíz; A. indica aceite; Foliar damage in maize; Lethal effects; Metabolic cost; Azadirachta indica watery extracts; A. indica oil; Entomología; Acarología; Doctorado.
Ano: 2010
URL: http://hdl.handle.net/10521/74

Efecto del Nim (Azadirachta indica) (A. Juss) en el desarrollo biológico y el metabolismo del gusano cogollero (Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) en maíz
Provedor de dados: 32
Autores: Gutiérrez García, Socorro del Carmen.
En el gusano cogollero Spodoptera frugiperda  (Smith) está documentado que los efectos subletales que Azadirachta indica ocasiona en poblaciones de este insecto ha sido la inhibición de la alimentación, efectos en el metabolismo del insecto y alteraciones en el desarrollo biológico; sin embargo,  no está cuantificado en qué magnitud ocurren estas alteraciones (Li, et al. 2003). Con el presente estudio se planteó  dar respuesta a estas interrogantes, a partir de los siguientes objetivos: 1) Analizar las alteraciones en el desarrollo biológico de larvas y pupas de Spodoptera frugiperda (Smith) causadas por el consumo de A. indica, 2) Determinar y cuantificar el efecto del consumo de A. indica en el metabolismo de S. frugiperda (Smith) y 3) Medir el control...
Palavras-chave: Efectos subletales; Costo metabólico; Azadirachta indica extractos acuosos; Daño foliar en maíz; A. indica aceite; Foliar damage in maize; Lethal effects; Metabolic cost; Azadirachta indica watery extracts; A. indica oil; Entomología; Acarología; Doctorado.
Ano: 2010
URL: http://hdl.handle.net/10521/74

Efectos de aptitud combinatoria y de interacción genotipo x ambiente en maíz para provitamina A y rendimiento.
Provedor de dados: 32
Autores: Mingramm Yarza, Germán.
Con la finalidad de evaluar la aptitud combinatoria y los efectos entre genotipo y medio ambiente en maíz, en relación con la provitamina A y rendimiento, la presente investigación se realizó utilizando las cruzas de 38 líneas (22 pertenecientes al grupo heterótico A y 16 al grupo heterótico B) con tres probadores cada una. Los híbridos formados se evaluaron en cuatro ensayos (tres del grupo heterótico A y uno del grupo heterótico B) bajo un diseño de bloques incompletos al azar. Cada ensayo se sembró en cuatro ambientes dentro de dos localidades (Tlaltizapán, Morelos– condiciones normales y labranza de conservación; y Agua Fría, Puebla– condiciones normales y de estrés hídrico). Los híbridos se evaluaron para rendimiento, días a floración y altura de...
Palavras-chave: Zea mays; Carotenos; Heredabilidad; Aditividad; Carotenes; Heritability; Additivity; Producción de Semillas; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/777

Efeito da adubação nitrogenada nas propriedades químicas de um Latossolo, cultivado com milho em sucessão à aveia-preta, na implantação do sistema plantio direto - DOI: 10.4025/actasciagron.v29i5.741
Provedor de dados: 1
Autores: Fernandes, Flávia Carvalho Silva; ESALQ - USP; Libardi, Paulo Leonel; ESAEQ-USP; Silva, Monica Martins da; ESAEQ-USP.
Avaliou-se o efeito de doses e do parcelamento do nitrogênio, aplicado como sulfato de amônio, nas características químicas do solo cultivado com milho em sucessão à aveia preta, na implantação do sistema plantio direto. O experimento foi conduzido num Latossolo Vermelho Amarelo (Hapludox), com 14% de argila na camada de 0-0,20 m. O trabalho consistiu de dois cultivos de milho conduzidos na safra de 2003/04 e 2004/05 e um cultivo de aveia preta como planta de cobertura na entressafra de 2004. O delineamento experimental foi o de blocos casualizados em um esquema fatorial incompleto, com quatro repetições. Os tratamentos consistiram de doses de nitrogênio de 60, 120 e 180 kg ha-1 de N, e uma testemunha sem nitrogênio, além dos parcelamentos com 30 ou 60 kg...
Palavras-chave: 5.01.03.00-8    Fitotecnia sucessão de culturas; Doses; Parcelamentos; Acidez do solo 5.01.03.00-8    Fitotecnia.
Ano: 2007
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/741

Efeito da aplicação de zinco em sementes sobre a nutrição e a produção de massa seca de plantas de milho - DOI: 10.4025/actasciagron.v29i4.410
Provedor de dados: 1
Autores: Leal, Renata Moreira; UNESP Jaboticabal; Franco, Claudemir Facincani; UNESP Jaboticabal; Barghirolli, Luiz Fernando; UNESP Jaboticabal; Artur, Adriana Guirado; UNESP Jaboticabal; Sabonaro, Debora Zumkeller; UNESP Jaboticabal; Bettini, Marcos; UNESP Jaboticabal; Prado, Renato de Melo; UNESP Jaboticabal.
O objetivo do trabalho foi o de avaliar o efeito do tratamento de sementes à aplicação de zinco sobre a nutrição e a produção de massa seca de plantas de milho. O experimento foi conduzido em casa de vegetação, utilizando o delineamento experimental inteiramente casualizado, em esquema fatorial 2 x 5, com três repetições. Os tratamentos foram constituídos de híbridos de milho (BRS 1001 e PZ 677), e cinco doses de zinco (0, 25, 50, 100 e 200 g de Zn por 20 kg de sementes), aplicados na forma de sulfato de zinco. Foi avaliado o efeito dos tratamentos sobre o índice de velocidade de emergência das plântulas e, após 28 dias da semeadura, avaliou-se a produção de massa seca e o teor de zinco na parte aérea e nas raízes. O aumento das doses promoveu elevação do...
Palavras-chave: 5.01.00.00-9    Agronomia Zea mays L.; Zn  tratamento de semente.
Ano: 2007
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/410

Efeito da deriva de herbicidas no desenvolvimento e na produção de milho.
Provedor de dados: 14
Autores: MAGALHAES, P. C.; DURAES, F. O. M.; KARAM, D.; RIBEIRO, L. de S.
bitstream/item/58834/1/ct-21-1.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Deriva; Desenvolvimento; Maize; Herbicide; Production.; Herbicida; Milho; Produção; Zea Mays.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484427

Efeito da Gliricidia sepium sobre nutrientes do solo, microclima e produtividade do milho em sistema agroflorestal no Agreste Paraibano.
Provedor de dados: 21
Autores: Marin, Aldrin Martin Pérez; Menezes, Rômulo Simões César; Silva, Emanuel Dias; Sampaio, Everardo Valadares de Sá Barreto.
Gliricidia sepium é uma leguminosa arbórea que tem sido utilizada em sistemas em aléias no semi-árido nordestino por apresentar bom desenvolvimento em condições de estresse hídrico. Entretanto, há pouca informação disponível sobre o efeito da introdução dessa espécie nos agroecossistemas da região. No presente estudo, objetivou-se avaliar a influência da distância de plantas de Gliricidia sepium sobre características da cultura do milho e do solo e microclima no Agreste Paraibano. O estudo foi realizado no município de Esperança (PB), em área de 0,5 ha, onde, em 1996, foram plantadas fileiras de G. sepium espaçadas 6 m entre si e com 1 m entre as árvores. Nesta área, em 2002, foram delimitadas quatro parcelas de 6 x 8 m e, em cada parcela, foi estabelecido...
Tipo: Journal paper
Palavras-chave: Soil biology; Soil.
Ano: 2006
URL: http://orgprints.org/22657/1/Marin_Efeito.pdf

Efeito de diferentes sistemas de preparo de solo na producao de soja e milho em um latossolo vermelho-escuro argiloso I. Comparacao de dois metodos de avaliacao de raizes.
Provedor de dados: 14
Autores: AMABILE, R. F.; RESCK, D. V. S.
bitstream/item/102141/1/pesq-31.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Latossolo vermelho-escuro; Avaliacao; Cultivar; C-606; Doko; Maize; Dark-red latosol; Production; Evaluation.; Cerrado; Glycine Max; Manejo do Solo; Milho; Produção; Raiz; Soja; Zea Mays.; Varieties.; Soybeans; Soil management; Roots.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549371

Efeito de diferentes sistemas de preparo de solo na producao de soja e milho em um latossolo vermelho-escuro argiloso II. Producao de graos e dados fenologicos.
Provedor de dados: 14
Autores: AMABILE, R. F.; RESCK, D. V. S.
bitstream/item/102143/1/pesq-32.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Latossolo vermelho-escuro; Cultivar; C-606; Doko; Maize; Production; Dark-red latosol.; Cerrado; Fenologia; Grão; Glycine Max; Manejo do Solo; Milho; Produção; Soja; Zea Mays.; Grain crops; Phenology; Soybeans; Soil management; Varieties.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549372

Efeito de diferentes teores de fósforo no solo sobre o rendimento de grãos do milho.
Provedor de dados: 14
Autores: NAKAYAMA, L. H. I.; SANTOS, R. F.
bitstream/item/39158/1/COT-14.83.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Mato Grosso do Sul; Maize; Fertilization.; Adubação; Cerrado; Fósforo; Milho; Zea Mays.; Brazil; Phosphorus.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/233145

Efeito do composto de lixo orgânico urbano de Barcarena na produção de matéria seca de milho em casa de vegetação.
Provedor de dados: 14
Autores: OLIVEIRA, R. F. de; CRUZ, E. de S.; TEIXEIRA, L. B.
bitstream/item/40519/1/Boletim-Pesquisa-26-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Lixo urbano; Produção de matéria seca; Belém; Pará; Brasil; Maize; Dry mather content.; Adubo Orgânico; Adubação; Milho.; Amazonia; Fertilizer application; Organic fertilizers.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382723

Efeito residual e reaplicação do lodo de esgoto em milho no Distrito Federal (2007).
Provedor de dados: 14
Autores: SILVA, J. E.; LEMAINSKI, J.; PEREIRA, C. E. B.
bitstream/item/78932/1/p2007-12.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Reaplicação; Maize; Sewage mud; Fertilization.; Lodo Residual.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570215

Efeitos da inclusão do extrato oleoso de urucum em rações de poedeiras com substituição total ou parcial do milho pelo sorgo de baixo tanino - DOI: 10.4025/actascianimsci.v28i4.603
Provedor de dados: 2
Autores: Costa, Fernando Guilherme Perazzo; UFPB; Gomes, Carlos Alan Vieira; UFPB; Silva, José Humberto Vilar da; UFPB; Carneiro, Maria Vitória Dias; UEPB; Goulart, Cláudia de Castro; UFPB; Dourado, Leilane Rocha Barros; UNESP Jaboticabal.
Este trabalho foi conduzido com o objetivo de avaliar o efeito da adição do extrato oleoso de urucum na s rações de poedeiras com substituição do milho pelo sorgo de baixo tanino. Foram utilizadas 324 aves em um delineament o inteiramente casualizado, com nove tratamentos, sendo uma ração controle e um fatorial 2 x 4 (dois níveis de sorgo e quatro níveis de extrato oleoso de urucum), com seis repetições de seis aves por unidade experimental. A substituição do milho pelo sorgo não alterou o desempenho das aves (P&gt;0,05), porém a inclusão do sorgo reduziu o peso do albúmen e aumentou o peso e a porcentagem da casca (P
Palavras-chave: 5.04.00.00-2    Zootecnia avicultura; Pigmentação da gema; Produção de ovos.
Ano: 2006
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/603

Efeitos da permanência do milho no campo após a sua maturação, nas condições climáticas do Acre.
Provedor de dados: 14
Autores: COSTA, J. G. da; CAMPOS, I. S.
bitstream/CPAF-AC/935/1/pesquisa73.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Maize; Harvest; Damages; Pest.; Armazenamento; Colheita; Inseto; Milho; Perda; Praga.; Insects; Storage.
Ano: 1994
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/492181

Efeitos da toxicidade de duas espécies químicas de alumínio (Al) sobre o crescimento de plantas de milho cultivadas em solução nutritiva
Provedor de dados: 1
Autores: Pintro, Jose Carlos; UEM.
Os efeitos da toxicidade de duas espécies químicas de alumínio (Al) - monomérica e polimérica - sobre o crescimento de plantas de milho, Zea mays L. (Poaceae), foram estudados em solução nutritiva de baixo valor de força iônica. Com o aumento da atividade de Al em solução nutritiva, houve redução da produção de massa seca da parte aérea e do comprimento da raiz principal. Os efeitos da toxicidade de Al foram mais intensos nas raízes do que na parte aérea. As raízes laterais também foram sensíveis ao Al. Com o aumento da atividade de Al, houve redução nos valores de comprimento. A redução do comprimento foi de 80% nos 2 cm iniciais no sentido da base para o ápice da raiz principal na atividade de 3,9 &amp;micro;M de Al em relação ao tratamento sem Al. As...
Palavras-chave: 5.00.00.00-4    Ciências Agrárias Alumínio; Toxicidade; Espécies químicas; Solução nutritiva; Crescimento; Zea mays 5.00.00.00-4    Ciências Agrárias.
Ano: 2002
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2267

Efeitos de densidade e época de emergência de Brachiaria brizantha em competição com plantas de milho - DOI: 10.4025/actasciagron.v28i3.958
Provedor de dados: 1
Autores: Jakelaitis, Adriano; UFV; Silva, Alexandre Ferreira da; UFV; Pereira, Jardel Lopes; UFV; Silva, Antonio Alberto da; UFV; Ferreira, Lino Roberto; UFV; Vivian, Rafael; UFV.
O objetivo deste trabalho foi avaliar os efeitos de densidades e épocas de emergência de Brachiaria brizantha em relação ao milho sobre a produção de ambas as espécies cultivadas em conjunto. O delineamento utilizado foi o de blocos casualizados, dispostos em arranjo fatorial, sendo que para o milho adotou-se o esquema 4x5+1, constituído de quatro densidades de B. brizantha por vaso (1, 2, 4 e 8 plantas), e cinco épocas de emergência de B. brizantha (7 dias antes, no mesmo dia e aos 7, 14 e 28 dias após a emergência do milho), mais um tratamento adicional correspondente ao milho solteiro. Na forrageira adotou-se o arranjo 4x5x2, constituídos pelas mesmas densidades e épocas de emergência e pela B. brizantha na presença e na ausência do milho. Utilizou-se...
Palavras-chave: 5.01.03.00-8    Fitotecnia períodos de convivência; Interferência; Zea mays L.; Brachiaria 5.01.03.00-8    Fitotecnia.
Ano: 2006
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/958

Effect meerjarige toepassing groenbemester en organische mest op bodemkwaliteit bij continuteelt maïs : 2e rapport project Zorg voor Zand
Provedor de dados: 21
Autores: van Schooten, H.A.; van Eekeren, N.; Hanegraaf, M.C.; van der Burgt, G.J.; de Visser, M.
In 2005 is onderzoek gedaan naar het effect van meerjarige toepassing van groenbemester en organische bemesting op diverse bodemkwaliteitskenmerken bij continuteelt van snijmaïs op zandgrond. De conclusie is dat het effect op de bodemkwaliteit en gewasopbrengst van organische bemesting wat groter was dan van groenbemester. De biologische activiteit werd nauwelijks beïnvloed door beide behandelingen.
Tipo: Report
Palavras-chave: Soil biology.
Ano: 2006
URL: http://orgprints.org/9692/1/01_Rapport.pdf

Effect of 15n-labeled hairy vetch and nitrogen fertilization on maize nutrition and yield under no-tillage¹
Provedor de dados: 90
Autores: Almeida Acosta,José Alan de; Amado,Telmo Jorge Carneiro; Neergaard,Andreas de; Vinther,Mads; Silva,Leandro Souza da; Silveira Nicoloso,Rodrigo da.
This study evaluated the effect of hairy vetch (Vicia villosa Roth) as cover crop on maize nutrition and yield under no tillage using isotope techniques. For this purpose, three experiments were carried out: 1) quantification of biological nitrogen fixation (BNF) in hairy vetch; 2) estimation of the N release rate from hairy vetch residues on the soil surface; 3) quantification of 15N recovery by maize from labeled hairy vetch under three rates of mineral N fertilization. This two-year field experiment was conducted on a sandy Acrisol (FAO soil classification) or Argissolo Vermelho distrófico arênico (Brazilian Soil Classification), at a mean annual temperature of 18 ºC and mean annual rainfall of 1686 mm. The experiment was arranged in a double split-plot...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; 15N recovery; Cover crops; N uptake.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400028

Effect of Accelerated Compost on Soil Physical and  Chemical Properties of an Alfisol
Provedor de dados: 21
Autores: AyanfeOluwa, O.E.; AdeOluwa, O.O.; Oshunsanya, S.O.; Aduramigba-Modupe, V.O.
Accelerated compost (AC) is a newly developed commercial compost from market organic wastes and animal manure with composting accelerated within twenty one (21) days using a specific microorganism. However, information on effect of AC on soil properties is scarce. Therefore a field experiment was conducted in Ibadan to assess the effect of an AC on the properties of an Alfisol using maize (Zea mays L.) as a test crop. The experiment was laid out in a randomized complete block design with three replications. The treatments were AC at the rates of 60, 90, 120, 150 and 180 kgN/ha; while NPK 15-15-15 mineral fertilizer and conventional compost (CC) at 60 kgN/ha and an absolute control (no soil additive) were used as checks. Data collected on post cropping soil...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil.
Ano: 2015
URL: http://orgprints.org/28654/5/AyanfeOluwa%20et%20al.%20AOC3%20%28b7%29%20Published%20version.docx

Effect of Accelerated Compost on Soil Physical and  Chemical Properties of an Alfisol
Provedor de dados: 21
Autores: AyanfeOluwa, O. E; AdeOluwa, O. O.; Oshunsanya, S. O.; Aduramigba-Modupe, V. O.
Accelerated compost (AC) is a newly developed commercial compost from market organic wastes and animal manure with composting accelerated within twenty one (21) days using a specific microorganism. However, information on effect of AC on soil properties is scarce. Therefore the field experiment was conducted in Ibadan to assess the effect of an AC on the properties of an Alfisol using maize (Zea mays L.) as a test crop. The experiment was laid out in a randomized complete block design with three replications. The AC treatments rates were 60, 90, 120, 150 and 180 kg N/ha; while NPK 15-15-15 mineral fertilizer and conventional compost (CC) at 60 kg N/ha and an absolute control (no soil additive) were used as checks. Data collected on post cropping soil...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover.
Ano: 2015
URL: http://orgprints.org/28896/1/AyanfeOluwa%20et%20al%20full%20paper%20edited.docx

Effect of administering a diet contamined with fumonisins on the kidneys of wistar rats
Provedor de dados: 3
Autores: Venancio, Jade Cabestre; Universidade Estadual de Maringá; Emerich, Samara Siqueira; Universidade Estadual de Maringá; Branquinho, Nayra Thaís Delatorre; Universidade Estadual de Maringá; Sousa, Fernando Carlos de; Universidade Estadual de Maringá; Natali, Maria Raquel Marçal; Universidade Estadual de Maringá; Baroni, Edmara Aparecida; Universidade Estadual de Maringá.
Fumonisins (FBs) are mycotoxins produced by Fusarium molds. Several works have shown contamination of maize by this toxin. Fumonisin B1 (FB-1) is found in greatest proportion (about 70%), resistant to several industrialization processes. In that context, the objective of this work was to analyze the effect of administering a diet contaminated with FB-1 on the morphophysiology of the kidneys of 21-day old male Wistar rats. The animals were divided into 2 groups: G0 (with animals receiving feed free of FBs) and G6 (6mg of FB1 kg-1 of feed). The diet was administered during 42 days. After that period, the animals were placed in metabolic cages for urine collection, blood was collected for analysis of plasma creatinine, and the kidneys were fixed and stained...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.07.02.04-3 nephrotoxicity; Tubulointerstitial changes; Morphophysiology of the kidneys Fisiologia Renal.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19791

Effect of annual self-reseeding legumes on subsequent crops in organic rotation programme
Provedor de dados: 21
Autores: Al-Bitar, Lina.
Soil fertility management is a critical issue in organic agriculture, and nitrogen supply is the most important aspect, especially in the Mediterranean region. Biological nitrogen fixation by legumes seems to be a successful strategy in that nitrogen-fixing legumes can provide most of the nitrogen used in Mediterranean agriculture in a form not readily leached. According to Pimentel et al., 1992, in the U.S., an estimated $50 billion worth of nitrogen is provided by biological N fixation. Thus, the inputs of nitrogen into Mediterranean agricultural systems by biological fixation in nodulated legumes are fundamental to obtain sustainable and economic production.  This study aimed at evaluating the impact of annual self-reseeding legumes on subsequent crops...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2005
URL: http://orgprints.org/4213/4/Albitar_etal_4p_revised%2Ded.doc

Effect of atrazine on controlling Euphorbia geniculata in corn
Provedor de dados: 106
Autores: Somchart Kanjanajirawong; Jaran Pratoomwong; Maneesa Teerawatsakul.
2 tables
Palavras-chave: Corn; Maize; Weeds; Milkweed; Euphorbia geniculata; Atrazine; Weed control; ข้าวโพด; วัชพืช; อาทราซีน; ยูโฟร์เบีย.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4061

Effect of citric acid on the proteolytic activity of Zea mays L.
Provedor de dados: 64
Autores: Martinez-Pacheco,Mauro Manuel; Flores-Garcia,Alberto; Venegas-Gonzalez,Eulalio; Cepeda-Villegas,Mario Alberto.
Hybrids of Zea mays L. (Buffalo, Falcon, H360 y HV313) were treated with citric acid (2000 ppm). Grain yield, soluble protein and proteolytic activity were monitored when the crop reached physiological maturity. Citric acid was applied before the appearance of the flag leaf, and induced an increase in the grain yield from 4222 to 5780 kg/ha, in the soluble protein from 6.34 to 7.91 mg/mg and into the proteolytic activity from 14.3 to 65.7 µU mg prot-1. This is an increase of 2 to 12 times in the Falcon, H360 and HV313 hybrids, while the Buffalo hybrid responded with less intensity to the treatment with citric acid. In the H360 hybrid treated with citric acid, an increase in the proteolytic activity of aspartyl serine proteases was observed. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Citric acid; Proteolytic activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000500007

EFFECT OF COB SIZE AND MOISTURE CONTENT ON SHELLING PERFORMANCE OF LEVER OPERATED MAIZE COB SHELLER
Provedor de dados: 111
Autores: Bashir, Basharat; DIXIT, JAGVIR; DIXIT, JAGVIR.
The operating factors were studied for different maize shelling methods (lever operated maize sheller, octagonal tubular maize sheller and conventional beating method) that affected losses and capacity of shelling methods. The factors comprised two levels of moisture content (16-20 % and 12-16 %) and three levels of cob size (&amp;lt; 30mm, 30-40 mm, and &amp;gt; 40 mm).  The results of this study indicated that the shelling force required to detach maize grains from the unshelled cob was dependent on the grain moisture content and cob size. Highest shelling force of 173.5 N was found at moisture content of 16-20% w.b. and cob diameter &amp;gt; 40 mm while the lowest shelling force of (133 N) was found at cob diameter &amp;lt;30 mm and moisture content of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cob moisture content; Cob size; Lever operated maize cob sheller; Shelling   capacity; Shelling efficiency; Grain breakage.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5879

Effect of Compost versus Animal Manure Fertilization on Crop Development, Yield and Nitrogen Residue in the Organic Cultivation of Potatoes
Provedor de dados: 21
Autores: Willekens, Koen; De Vliegher, Alex; Vandecasteele, Bart; Carlier, Lucien.
Organic farmers in Flanders use manure from extensive conventional livestock systems due to a lack of animal manure from organic producers. The research question was if on-farm prepared compost mainly consisting of vegetal residues can be a good alternative. A long-term fertilization trial with a 4-year crop rotation of maize - potatoes - spring barley - red clover is carried out on two fields with a time difference of one year. The fertilization treatments are on-farm prepared compost, applied as a single dose and a double dose, farmyard manure, slurry and slurry combined with composted municipal waste. This paper concerns the experimental results of the potato crop in 2006 and 2007. The nitrate content of the plant juice was monitored and the potato...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Soil quality Soil tillage.
Ano: 2008
URL: http://orgprints.org/12573/1/Willekens_12573_ed.doc

Effect of copper carbonate and zinc oxide applied to seeds on copper and zinc uptake by maize seedlings
Provedor de dados: 53
Autores: Dias,Marcos Altomani Neves; Cicero,Silvio Moure.
ABSTRACT Seed treatment is an interesting alternative to deliver micronutrients to field crops. The aim of this study was to investigate the uptake of Cu and Zn by maize seedlings, with the application of the water-insoluble sources copper carbonate and zinc oxide as seed treatment. Treatments were composed of a control (untreated seeds), five doses of copper (0.14, 0.28, 0.56, 1.12 and 2.24 mg Cu∙seed–1) and zinc (0.55, 1.10, 2.20, 4.40 and 8.80 mg Zn∙seed–1) as well as five doses of copper and zinc combined (0.14, 0.28, 0.56, 1.12 and 2.24 mg Cu∙seed–1; 0.55, 1.10, 2.20, 4.40 and 8.80 mg Zn∙seed–1). Plants were cultivated in sand, under greenhouse conditions and, at the two-leaf stage (15 days), the root and shoot tissues dry mass and concentration of Cu...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Corn; Seed treatment; Micronutrients.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300286

Effect of Corn, Sugarbeets, and Fallow on Zinc Availability to Subsequent Crops
Provedor de dados: 18
Autores: Leggett, G.E.; Westermann, D.T.
Tipo: Article
Palavras-chave: Corn / maize; Sugarbeet; Mass Import - autoclassified (may be erroneous).
Ano: 1986
URL: http://eprints.nwisrl.ars.usda.gov/462/1/580.pdf

Effect of dairy management on quality characteristics of milk
Provedor de dados: 21
Autores: Slots, Tina; Leifert, Carlo; Butler, Gillian; Kristensen, Troels; Nielsen, Jacob Holm.
The objective of the study was (i) to compare the nutritional composition of milk produced in organic and conventional production systems taking into consideration: different proportions of grass or grass silage, maize silage and different amount of concentrate (cereals), and (ii) to define the variation in content of pro- and antioxidants in milk in relation to regional variation, feeding and season. The feeding regime from 25 farms from Denmark, 20 farms from Sweden and 25 farms from United Kingdom was reg-istered and milk samples were collected and analysed for the content of antioxidants and fatty acid compo-sition. The daily milk production was significantly higher in the conventional milk production systems in the two Scandinavian countries compared...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Farm nutrient management Health and welfare.
Ano: 2006
URL: http://orgprints.org/7631/1/Tina%2DSlots.doc

Effect of detasseling on baby corn, green ear and grain yield of two maize hybrids
Provedor de dados: 75
Autores: Moreira,Joserlan N; Silva,Paulo Sérgio L; Silva,Kathia MB; Dombroski,Jeferson LD; Castro,Renato S.
Three experiments (E1, E2, and E3) were carried out in Mossoró, Brazil, to evaluate baby corn yield, green ear yield, and grain yield, respectively, of two corn hybrids (AG 1051 and BRS 2020), in response to detasseling (with or without tassel). A randomized split-plot block design (with hybrids defined as plots) and ten replicates was used. The three experiments were planted on the same day and in neighboring areas. In the three experiments, the hybrids did not differ from each other on the dry matter mass and number of tassel branches. In E1 (baby corn production at 180 thousand plants ha-1), for both hybrids, the following effects were observed due to detasseling: a) an increase in ear total number, in ear total weight, in marketable unhusked ears...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Cultivars; Tassel.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362010000400005

Effect of Different Herbicides, Plant Extracts and Mulches on Yield and Yield Components of Maize
Provedor de dados: 87
Autores: KHAN,I.A.; REHMAN,O.U.; KHAN,S.A.; HAMEED ALSAMADANY,; YAHYA ALZAHRANI,.
ABSTRACT: To examine the effect of pre emergence herbicides, plant extracts and mulches on yield and yield components of maize, a field experiment was carried out at New Developmental Farm, The University of Agriculture Peshawar-Pakistan during summer crop season 2016. Maize variety “Azam” was sown in Randomized Complete Block (RCB) design having four replications and ten treatments i.e. hand weeding, Dual Gold 960 EC (S-metolachlor 1 L ha-1), Stomp 330 EC (pendimethaline 2.5 L ha-1), atrazine 1.25 L ha-1, Eucalyptus camaldulensis L. extract (125 g L-1), Ammi visnaga L. extract (125 g L-1), black plastic mulch, wheat straw mulch, saw dust mulch and weedy check. The data revealed that hand weeding and herbicides significantly affected the weed density...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopthy; Zea mays L.; Chemical control; Soil cover; Weeds; Crop production.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100228

EFFECT OF DIFFERENT LEVELS OF NPK AND MICRONUTRIENT ON YIELD AND DISTRIBUTION OF NUTRIENTS IN MAIZE UNDER IRRIGATED AGRICULTURE
Provedor de dados: 111
Autores: El-Fouly, Mohamed Mostafa; Shaaban, Samir Hosni.
A field experiment was carried out in Kafer El Kadera village at El–Monofia Governorate, during 5 consecutive years, 2010–2014, to test the effects of NPK and balanced fertilization on the yield and its components, and distribution of nutrients in different parts of maize (var.30K8).There was a significant increase of the number of leaves/plant, the length of cob, the number of rows in the cob and the number of grains in the row as a result of treated plants with NPK according to soil testing plus foliar application of micronutrients by 34.18, 27.94, 32.182, and 33.43%, respectively.There was also a significant increase in the chilling % rate, weight of 100 grains and yield of grain / plant, yield /ton/ha by 16.52, 35.39, 68.40, and 72.92%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; NPK fertilization; Nutrients distribution; Irrigated agriculture.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5463

Effect of different plant populations and combinations of N P K on the grain yield of improved maize under late sown condition in the Kathmandu valley, Nepal
Provedor de dados: 106
Autores: Deo, G.P.
1 ill., 4 tables
Palavras-chave: Corn; Maize; Plant population; NPK fertilizers; Grain yield; Yields; Late sown condition; Nepal; Kathmandu valley; ข้าวโพด; ประชากร; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสฟอรัส; ปุ๋ยโปแตสเซียม; ผลผลิต; เนปาล; การปลูกปลายฤดู.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3888

Effect of Drying on Soil Strength and Corn Emergence
Provedor de dados: 18
Autores: Fapohunda, H.O.; Kemper, W.D.; Heerman, D.F.
Tipo: Article
Palavras-chave: Corn / maize; Soil; Mass Import - autoclassified (may be erroneous).
Ano: 1985
URL: http://eprints.nwisrl.ars.usda.gov/442/1/559.pdf

Effect of endomycorrhiza on growth and nutrient absorption ability of corn
Provedor de dados: 106
Autores: Omsub Nopamornbodi.
6 tables
Palavras-chave: Corn; Maize; Endomycorrhiza; Growth; Nutrient absorption; ข้าวโพด; เอนโดไมคอร์ไรซา; การเจริญเติบโต; การดูดซึมธาตุอาหาร.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3983

Effect of environment on photosynthesis by corn
Provedor de dados: 106
Autores: Musgrave, R.B.
6 ill.
Palavras-chave: Corn; Maize; Photosynthesis; Environment; Growth rate; ข้าวโพด; การสังเคราะห์แสง; อัตราการเจริญเติบโต.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3743

Effect of extended field drying on quality of Thai maize
Provedor de dados: 106
Autores: Supot Faungfupong; Nagler, Martin J.; Pipat Weerathaworn; Rungnapa Tangadulratana; Nagler, C.; Wong-Urai, A.; Tonboon-Ek, P.; Buangsuwan, D.
2 tables
Palavras-chave: Corn; Maize; Corn quality; Corn drying period; ข้าวโพด; การเก็บเกี่ยว; ผลผลิต; คุณภาพ.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4393

Effect of fertilizer application and planting method on yield of two corn varieties
Provedor de dados: 106
2 tables
Palavras-chave: Corn; Maize; Fertilizers; Planting methods; Varieties; Yields; ข้าวโพด; การใส่ปุ๋ย; วิธีการปลูก.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3811

Effect of five year application of NPK on corn-mungbean grown on Kamphaeng Saen soil
Provedor de dados: 106
Autores: Santi Teeraporn; Ring Meesawat; Pradit Boonampol; Sathaporn Janthasith.
Palavras-chave: Corn; Maize; Mungbeans; Cropping systems; NPK fertilizers; Kamphaeng Saen soil; ข้าวโพด; ถั่วเขียว; การใช้ปุ๋ย; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสฟอรัส; ปุ๋ยโปแตสเซียม; ดินชุดกำแพงแสน.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4359

Effect of foliar fungicide and plant spacing on the expression of lipoxygenase enzyme and grain rot in maize hybrids
Provedor de dados: 1
Autores: Kluge, Elizandro Ricardo; Mendes, Marcelo Cruz; Faria, Marcos Ventura; Santos, Leandro Alvarenga; Santos, Heloisa Oliveira dos; Szeuczuk, Kathia.
This study was carried out with the objective of evaluating the effect of fungicide application on grain rot in commercial maize hybrids and the relation between grain rot and the expression of lipoxygenase enzyme in grain in conventional row spacing of 0.70 m and reduced row spacing of 0.45 m. Treatments were made in a 3 x 8 factorial scheme, using three forms of management with fungicide (Trifloxystrobin + Prothioconazole) and eight maize hybrids divided into two groups (tolerant and susceptible) with three repetitions, totaling 72 plots in each environment (conventional and reduced spacing) in the 2013/2014 crop. The following characteristics were evaluated: grain rot percentage and lipoxygenase enzyme expression (LOX) in the grain. The hybrid and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.01-6; LOX; Spindle rot; Chemical control; Reduced spacing; Zea mays Produção Vegetal.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/33003

Effect of frying conditions on storage stability of fried maize snack (kokoro)
Provedor de dados: 111
Autores: Akinoso, Rahman; Akinoso, Rahman.
Snacks can be produced from maize and other cereals and legumes. Kokoro is a popular traditional fried maize snack widely consumed among adults and children in South Western states of Nigeria. Short shelf life is associated with fried products including kokoro. Improving its shelf life therefore entails understanding the frying process, optimizing the frying condition and studying the storage stability of the fried product. This work was designed to study the storage stability of kokoro (produced at the recommended optimum processing condition) enriched with African yam bean (AYB) and evaluate its storage life. The kokoro was produced and packaged in polyethylene bags (100μm) and stored at ambient conditions (24°C±3°C temperature and 61%±3% relative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food processing and preservation; Functional food product development African yam bean seed flour; Fried maize snack (kokoro); Free fatty acid value; Moisture adsorption isotherm characteristics; Nigeria.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3376

Effect of Fusarium graminearum and infection index on germination and vigor of maize seeds
Provedor de dados: 102
Autores: Galli,Juliana A; Fessel,Simone A; Panizzi,Rita C.
Pathogens in maize (Zea mays) seeds cause serious problems, such as the loss of their capacity to germinative. The objectives of this study were to identify the optimal period for infection of maize seeds on agar colonized by Fusarium graminearum, when incubated for 4, 8, 16 and 32 h, and to evaluate the effect of the fungus on the germination and vigor of seeds with different infection levels. After the respective incubation periods, the seeds were removed from the culture medium and submitted to the blotter test for 3 min with and without superficial disinfection with 1% solution of sodium hypochlorite. Once the optimal period for seed incubation was identified, seeds from the same sample were again placed on the colonized agar for infection. Germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Seed pathology.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000500002

Effect of grain type on grain aflatoxin contamination in field corn
Provedor de dados: 106
Autores: Supot Faungfupong; Rungnapa Tangadulratana; Prawat Tonboon-Ek; Kanjana Bhudhasamai; Dara Buangsuwon.
2 tables
Palavras-chave: Corn; Maize; Grain type; Fungi; Aflatoxins; ข้าวโพด; ข้าวโพดเลี้ยงสัตว์; ลักษณะเมล็ด; เชื้อรา; อะฟลาทอกซิน; พันธุ์.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4258

Effect of grazing fresh legumes or feeding silage on enzymes involved in the synthesis of milk fat in dairy cows
Provedor de dados: 21
Autores: Wiking, L.; Theil, Peter K.; Nielsen, Jacob H.; Sørensen, Martin T.
The impact of fresh legume types or silage on the composition of milk fatty acids and transcription of enzymes involved in the synthesis of milk fat in cows was studied. Three groups of cows grazed white clover, red clover and lucerne, respectively. A fourth group of cows was fed maize/grass silage. The cows grazing high proportions of legumes produced significantly more C18:1 trans-11, C18:2 cis9-trans11, C18:2 trans10-cis12 and C18:3 fatty acids than cows fed silage. White clover and lucerne grazing resulted in significantly less output of C18:1 trans9 in milk than red clover grazing and maize/grass silages. The transcription of Stearoyl-CoA desaturase (SCD) in mammary tissue was significantly increased by grassing high proportions legume whereas fatty...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health Feeding and growth.
Ano: 2009
URL: http://orgprints.org/16596/1/16596.doc

Effect of green manure on weeds and soil fertility in two organic experimental agroecosystems of different ages. Results from 2 years.
Provedor de dados: 21
Autores: Migliorini, Dr Paola; Vazzana, Prof Concetta; Moschini, Dott Valentina.
In order to acquire more information about green manure practices in the Mediterranean environment, green-manure crops from two seasons (2003/2004 and 2004/2005) were compared and evaluated in two agroecosystems (“Old Organic” and “Young Organic”) of the Montepaldi Long Term Organic Experiment in Tuscany. Data collection included green manure crop (biomass, weeds competition capacity, N and C content), weed biodiversity on maize, and soil fertility characteristics over three periods (in October before sowing the green manure, in April before the incorporation of the green-manure in the soil, and in September at the maize harvest). The different green manure species produced no significant effects on the weeds and N% and C% in the soil. Weeds...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farm nutrient management.
Ano: 2008
URL: http://orgprints.org/12367/1/Migliorini_12367_ed.doc

Effect of Herbicides on Yield and Yield Components of Hybrid Maize (Zea mays)
Provedor de dados: 87
Autores: KHAN,I.A.; HASSAN,G.; MALIK,N.; KHAN,R.; KHAN,H.; KHAN,S.A.
ABSTRACT Maize crop (Zea mays) is facing lots of problems from different pests throughout Asia, including Pakistan. Weed infestation is one of the serious pests that remarkably decrease the grain yield in maize. In Khyber Pakhtunkhwa province of Pakistan, the trend of maize hybrid cultivation is gaining the attention of the farmers due to its higher production. Therefore, in this research we tested herbicides (Stomp 330 E, Dual gold 960 EC, 2,4-D, ester) in maize hybrids (P-3025, P-32T78, P-3203). The experiment was done in RCB design with split plots arrangement, where maize hybrids were kept in main plots, while herbicides were assigned to the subplots. Each treatment was repeated three times at the New Developmental Farm (NDF), at the Peshawar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicides; Leaf area; Maize hybrids; Weeds.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400729

Effect of liquid poultry manure and injection depth on growth and yield of maize
Provedor de dados: 111
Autores: Manuwa, Seth Idowu; Ademosun, Olugboyega Cornelius; Akande, Lamidi Olawale.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural engineering; Farm power and machinery; Land application of biosolids Injection  liquid poultry manure  maize (Zea mays)  growth  yield.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2784

Effect of local design machine , clearance and grain moisture on corn shelling
Provedor de dados: 111
Autores: Alwan, salih kadhim.
The effect of local thresher machine on maize cultivar Rabie was observed based on some technical indicators, under two clearance of threshing cylinders (0.7 and 0.9mm) and three grain moisture content .The experiments were conducted in a factorial experiment under complete randomized design with three replications. The 0.9mm clearance  was significantly better than 0.7mm clearance  while the moisture content of grain at range of 13-15% was significantly superior to the other ranges of 15-17% and17%-19% in all studied parameters. For local THM the machine productivity, power consumption, threshing efficiency, grains damage ,broken corn, grain cleaning, were 1.251 th-1, 9.358 kW, 88.717; 1.529; 3.272;  and 1.318 percent respectively. The interaction among ...
Tipo: Info:eu-repo/semantics/article
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6225

Effect of management practices on mycorrhizal infection, growth and dry matter partitioning in field-grown bean
Provedor de dados: 86
Autores: Oliveira,Antonio Alberto Rocha; Sanders,Francis Edward.
The experiment was carried out on unsterilized field soil with low phosphorus availability with the objective of examining the effect of cultural practices on mycorrhizal colonization and growth of common bean. The treatments were: three pre-crops (maize, wheat and fallow) followed by three soil management practices ("ploughing", mulching and bare fallow without "ploughing" during the winter months). After the cultural practices, Phaseolus vulgaris cv. Canadian Wonder was grown in this soil. Fallowing and soil disturbance reduced natural soil infectivity. Mycorrhizal infection of the bean roots occurred more rapidly in the recently cropped soil than in the fallow soil. Prior cropping with a strongly mycorrhizal plant (maize) increased infectivity even...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Arbuscular mycorrhizal fungi; Soil management practices; Crop rotation.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000700018

Effect of management systems and cover crops on organic matter dynamics of soil under vegetables
Provedor de dados: 90
Autores: Souza,Rodrigo Fernandes de; Figueiredo,Cícero Célio de; Madeira,Nuno Rodrigo; Alcântara,Flávia Aparecida de.
Vegetable production in conservation tillage has increased in Brazil, with positive effects on the soil quality. Since management systems alter the quantity and quality of organic matter, this study evaluated the influence of different management systems and cover crops on the organic matter dynamics of a dystrophic Red Latosol under vegetables. The treatments consisted of the combination of three soil tillage systems: no-tillage (NT), reduced tillage (RT) and conventional tillage (CT) and of two cover crops: maize monoculture and maize-mucuna intercrop. Vegetables were grown in the winter and the cover crops in the summer for straw production. The experiment was arranged in a randomized block design with four replications. Soil samples were collected...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic carbon; Oxidizable fractions; Microbial biomass; Humic fractions.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300024

Effect of mulching and manuring on corn cultivation
Provedor de dados: 106
Autores: Samnao Phetchawee; Nonglak Vibulsukh.
1 ill., 3 tables
Palavras-chave: Corn; Maize; Mulching; Manuring; Cultural practices; Fertilizers; Composts; Yields; Nutrient uptake; Soil chemical properties; ข้าวโพด; การคลุมดิน; การใช้ปุ๋ยคอก; การเพาะปลูก.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4107

Effect of mulching on soil fertility and growth of upland crops
Provedor de dados: 106
Autores: Samnao Phetchawee; Nonglak Vibulsukh; Prapai Chairoj; Igarashi, T.; Ishida, H.
2 ill., 7 tables
Palavras-chave: Corn; Maize; Mungbeans; Upland crops; Mulching; Soil moisture content; Soil fertility; ข้าวโพด; ถั่วเขียว; ความอุดมสมบูรณ์ของดิน; การคลุมดิน.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3981

EFFECT OF NITROGEN FERTILIZER AND MAIZE STRAW INCORPORATION ON NH4+15N AND N0(3) -15N ACCUMULATION IN BLACK SOIL OF NORTHEAST CHINA AMONG THREE CONSECUTIVE CROPPING CYCLES
Provedor de dados: 126
Autores: Lu,Caiyan; Ma,Jian; Chen,Xin; Zhang,Xudong; Shi,Yi; Huang,Bin.
A pot experiment was conducted to evaluate the effect of nitrogen (N) fertilizer and maize straw incorporation on the accumulation of NH4+-15N and N0(3)--15N in soil inorganic N pool among three consecutive cropping cycles, aimed to search for an effective N management practice to decrease superfluous accumulation of soil inorganic N and fertilizer N losses. The results showed that the amounts of soil NH4+-15N, N0(3)-15N and inorganic 15N, and their percent to applied 15N-labeled fertilizer declined significantly with sampling time (p &amp;#8804; 0.001).Compared to low N application rate (44.64 mg N kg-1 soil), high N application rate (89.28 mg N kg-1 soil) enhanced significantly the amounts of soil NH4+-15N, N0(3)--15N and inorganic 15N by 238.6%, 132.9%...
Tipo: Journal article
Palavras-chave: N fertilizer; Maize straw; NH4+-15N; N0(3)--15N accumulation; Black soil.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000200005

Effect of organic and conventional farming systems on nitrogen use efficiency of potato, maize and vegetables in the Central highlands of Kenya
Provedor de dados: 21
Autores: Musyoka, Martha W.; Adamty, Noah; Muriuki, Anne W.; Cadisch, Georg.
Increased per capita food production in the tropics is closely tied to soil organic matter and water management, timely nitrogen (N) supply and crop N use efficiency (NUE) which are influenced by farmingsystems. However, there is lack of data on the effect of organic farming systems on NUE and how thiscompares to conventional farming systems under tropical conditions. Therefore, the objectives of thisstudy were to determine the effect of conventional and organic farming systems at low and high management intensities on N uptake and N use efficiency of potato (Solanum tuberosum L.), maize (Zea mays L.),cabbage (Brassica oleracea var. Capitata), kale (Brassica oleracea var. Acephala) and Swiss chard (Beta vul-garis sub sp. Cicla). The organic high input...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Vegetables; Africa; Root crops.
Ano: 2017
URL: http://orgprints.org/31473/1/musyoka-etal-2017-EuropeanJourAgri-Vol86-p24-36.pdf

Effect of pipes installation by modified machine for subsurface drip irrigation system on maize crop yield costs
Provedor de dados: 111
Autores: Mansour, Hani A; Hu, Jiandong; Pibars, Sabreen; Bao, Hong Feng; Liang, Changmei.
The machine of pipes installation of subsurface drip irrigation systems was tested and studied at the Abu-Ghalib farms production (private farm), El-Giza Governorate, Egypt, in growing summer season 2017.  The goal of this research was to study the technical and economical evaluation of the installation subsurface pipes for drip irrigation system by Manual method (M) as control, Semi-Mechanical method (SM), and Quad-Raw Machine method (QRM) using different lateral spacing.  The QRM method of installation is powered by tractor, the SM method consists of three steps: firstly, the drill plow is drilled under the soil using the tractor, then the pipes are extended in the holes by the labors, and the M method of installation is by labors only for all steps for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Subsurface; Drip; Irrigation; Semi Mechanical; QRM; Machine; Installation; Lateral.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5424

Effect of plant densities and planting dates on some agronomic characteristics and grain yield of field corn varieties
Provedor de dados: 106
Autores: Prakob Jan-aram.
2 tables
Palavras-chave: Corn; Maize; Plant density; Planting date; Grain yield; Varieties; ข้าวโพด; ข้าวโพดไร่; ลักษณะทางการเกษตร; ผลผลิต; ความหนาแน่น; วันปลูก; พันธุ์.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4334

Effect of planting density on green ear yield of maize cultivars bred in different periods
Provedor de dados: 75
Autores: Silva,Paulo Sérgio L e; Duarte,Severino R; Oliveira,Fábio Henrique T de; Silva,Júlio César do V.
Corn cultivation in the Northeast region of Brazil is characterized by a great diversity of production systems, ranging from large companies (modern cultivars and relatively high planting densities) to small farms (family agriculture, traditional cultivars, and low planting densities). In the present work we evaluated the effects of planting density (30; 40; 50; 60; or 70 thousand plants ha-1 - TPH) on green ear yield of cultivars Centralmex (traditional) and AG 510 (hybrid). Different densities were achieved by maintaining 1.0 m between rows and varying the spacing between pits, within the row. Cultivars and planting densities were combined in a factorial scheme, arranged in a random block design with four replicates and four 6 m long row plots. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Green corn; Plant populations; Plant height; Root biomass.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362007000200005

Effect of potassium on the leaching of chemical species in a soil treated with sewage sludge
Provedor de dados: 52
Autores: Paglia,Edmilson Cezar; Serrat,Beatriz Monte; Freire,Clarice Azevedo de Luna; Sirtoli,Ana Rosa dos Anjos; Veiga,Andrea Mayer.
The objective of this research was to evaluate the potassium interference, used as supplementary fertilization, in the ions leaching, in a soil that was treated with alkalinized sewage sludge and cultivated, with maize. The experimental set with sewage sludge results showed an increase of the potassium concentration and chloride concentration in the leached solution, as well as the reduction of the Al3+ concentration, as the doses of potassium fertilizer applied to the soil were increased, for the four leachings. The presence of sewage sludge treated with lime increased the concentration of NO3 -, Cl-, Ca2+, Mg2+ and Al3+ in the solutions in the majority of leachings. Values of Al3+ were higher than 0.1 mg L-1, than in all leachings when sewage sludge was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosoli; Ionic leaching; Water contamination; Environmental pollution.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400004

Effect of priming and seed-coating when associated with Bacillus subtilis in maize seeds
Provedor de dados: 124
Autores: Junges,Emanuele; Toebe,Marcos; Santos,Ricardo Feliciano dos; Finger,Geísa; Muniz,Marlove Fátima Brião.
The aim of this study was to evaluate the effect on the physiological performance of maize seeds (Zea mays L.) of micro-priming with Bacillus subtilis associated with techniques of water restriction and seed-coating. The micro-priming of the seeds, without any additional techniques, was carried out using a commercial product, Rhizoliptus ® (Bacillus subtilis). Water restriction was carried out using a PDA medium (Potato - Dextrose - Agar) with mannitol (-0.7 MPa), upon which the culture was grown for 48hours. One hundred sterilized corn seeds were placed in each dish. Once root protrusion occurred in one seed, the rest were removed and kept in a laboratory environment for 48 hours. The coating was carried out by the addition of Seed Polymer Color HE (50 ml...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polymer; Priming; Initial growth and development; Zea mays L.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300014

Effect of rate and time of application of phosphorus and nitrogen on corn
Provedor de dados: 106
Autores: Sibawihi.
1 table
Palavras-chave: Corn; Maize; Phosphorus fertilizers; Nitrogen fertilizers; Application rates; Timing; Growth; Yields; ข้าวโพด; ปุ๋ยฟอสฟอรัส; ปุ๋ยไนโตรเจน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3779

Effect of rotary blade design modification on residue retention into conservation agriculture practice
Provedor de dados: 111
Autores: Mahmud, Md Talash; Rahman, Md Towfiqur; Hossain, Md Mosharraf; Rabbani, Muhammad Ashik-E-.
Conservation Agriculture (CA) has been a promising technique for better crop production. Manual seeding with conventional tillage practice is laborious and time consuming. However, Strip tillage (ST) method incorporating seeding machines minimizes human drudgery and optimizes the crop yield. Many problems associated with ST have been rectified e.g. tiny furrow backfill, inaccuracy of seed and fertilizer placement, leading to poor germination and curtailed outcomes. This article focused on the effects of residue retention for the rotary blades design on a versatile multi-crop planter (VMP). Four types of rotary blades of VMP differed by 15o increment of tip angles were designed, fabricated, and experimented with a constant speed 350 RPM for ST operation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Strip tillage; Rotary blade; Tip angle; Residue height.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6181

Effect of row spacing upon yield of two corn varieties under weeded and unweeded condition
Provedor de dados: 106
Autores: Ismail, Inu G.
1 table
Palavras-chave: Corn; Maize; Row spacing; Varieties; Weed control; Yields; ข้าวโพด; ระยะปลูก; การควบคุมวัชพืช.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3777

Effect of seed inoculation with Azospirillum brasilense and nitrogen fertilization rates on maize plant yield and silage quality
Provedor de dados: 96
Autores: Skonieski,Fernando Reimann; Viégas,Julio; Martin,Thomas Newton; Nörnberg,José Laerte; Meinerz,Gilmar Roberto; Tonin,Tiago João; Bernhard,Priscila; Frata,Marcela Tostes.
ABSTRACT The objective of this study was to determine the effect of Azospirillum brasilense inoculation and different nitrogen (N) rates applied as topdressing on the productivity of a maize crop and the nutritional value of maize silage. Two experiments were conducted in the 2012/2013 and 2013/2014 harvests. Treatments were distributed in a randomized block design in a factorial arrangement, which consisted of two maize hybrids (AS 1572 and Defender) coupled with nitrogen rates (0, 60, 120, 240, and 480 kg ha-1), inoculated or uninoculated with A. brasilense. Inoculated seeds were treated with the A. brasilense strains Ab-V5 and Ab-V6. Inoculation with A. brasilense showed interaction with the hybrids, agricultural years, and nitrogen rates for the maize...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diazotrophic bacteria; Morphological composition; Nitrogen fertilization; Nutritional value; Silage yield.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000900722

Effect of Seed treatment, Panchagavya application, Growth and yield of Maize
Provedor de dados: 21
Autores: Shubha, S.
An experiment was conducted to study the effect of seed treatment,Panchagavya application and organic farming systems on growth and yield of Maize. grain yield of maize varied significantly due to different organic farming systems, seed treatment and panchagavya spray.Maximum grain yield of 19.3 q per ha was recorded in organic farming system II and minimum maize grain yield was recorded in system I (17.1q/ha).The grain yield of 19.6 q per ha and 16.90 q per ha was recorded with panchagavya(3%)and with out panchagavya spray respectively.Maximum yield of 19.90 q per ha was recorded in seed treatment with Panchagavya followed by beejamrutha(17.99q/ha) and minimum grain yield of 16.90q per ha was recorded in control.higher microbial population was observed in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2014
URL: http://orgprints.org/23483/1/23483%20Shubha_OWC_research%20track%20Maize%20Beejamrutha_MM.pdf

EFFECT OF SOIL TILLAGE AND PLANT RESIDUE ON SURFACE ROUGHNESS OF AN OXISOL UNDER SIMULATED RAIN
Provedor de dados: 90
Autores: Panachuki,Elói; Bertol,Ildegardis; Alves Sobrinho,Teodorico; Oliveira,Paulo Tarso Sanches de; Rodrigues,Dulce Buchala Bicca.
Surface roughness of the soil is formed by mechanical tillage and is also influenced by the kind and amount of plant residue, among other factors. Its persistence over time mainly depends on the fundamental characteristics of rain and soil type. However, few studies have been developed to evaluate these factors in Latossolos (Oxisols). In this study, we evaluated the effect of soil tillage and of amounts of plant residue on surface roughness of an Oxisol under simulated rain. Treatments consisted of the combination of the tillage systems of no-tillage (NT), conventional tillage (CT), and minimum tillage (MT) with rates of plant residue of 0, 1, and 2 Mg ha-1 of oats (Avena strigosa Schreb) and 0, 3, and 6 Mg ha-1 of maize (Zea mays L.). Seven simulated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil cover; Soil surface microrelief; Soil conservation systems.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100268

Effect of stalk rot on yield
Provedor de dados: 106
Autores: Shah, Ashok.
1 table
Palavras-chave: Corn; Maize; Stalk rot; Plant diseases; Yields; ข้าวโพด; โรคลำต้นเน่า; ผลผลิต.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3775

Effect of the aqueous extracts of the seeds of Talisia esculenta and Sapindus saponaria on fall armyworm
Provedor de dados: 52
Autores: Santos,Wander Laizo dos; Freire,Maria das Graças M.; Bogorni,Paulo Cesar; Vendramim,José Djair; Macedo,Maria Lígia R.
The effect of aqueous extracts of Talisia esculenta (T.E.) and Sapindus saponaria (S.S.), were evaluated on the development and mortality of 8-14th day-life Spodoptera frugiperda, an important pest of maize. Corn leaves were dipped in the aqueous extracts (1% w/v) and offered as food to the caterpillars. The treated corn leaves with the extracts caused larval mortality (26.71%/T.E.; 63.3%/S.S.) and also showed effect on the larval weight (237.50 mg/T.E.; 86.65 mg/S.S.) when compared with the control (11.3% and 293.45 mg), mortality and larval weight, respectively. The electrophoresis with gelatin (0.1%) showed two very clear white areas (trypsin activity) in the caterpillars midgut of all the treatments. Only the caterpillar treated with S. saponaria...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Talisia esculenta; Sapindus saponaria; Sapindaceae; Spodoptera frugiperda; Natural insecticide.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200018

Effect of the flavonoid rutin on the biology of Spodoptera frugiperda (Lepidoptera: Noctuidae)
Provedor de dados: 1
Autores: Silva, Talita Roberta Ferreira Borges; Almeida, André Cirilo de Sousa; Moura, Tony de Lima; Silva, Anderson Rodrigo da; Freitas, Silvia de Sousa; Jesus, Flávio Gonçalves.
The fall armyworm Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) is a major pest of maize crops in Brazil. The effects of plant metabolites on the biology and behavior of insects is little studied. The aim of the study was to evaluate the activity of rutin on the biology of the S. frugiperda by using artificial diets containing rutin. The study evaluated four treatments: regular diet (control group) and diets containing 1.0, 2.0 and 3.0 mg g-1 of rutin. The following biological variables parameters of the larvae were evaluated daily: development time (days), larval and pupal weight (g) and viability (%), adult longevity and total life cycle (days). A completely randomized experimental design was used with 25 replication. The rutin flavonoid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fall armyworm; Insecticide plant; Secondary metabolite; Flavonoid Fitossanidade.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27956

Effect of toasting field beans and of grass-clover: Maize silage ratio on milk production, milk composition and sensory quality of milk
Provedor de dados: 21
Autores: Mogensen, L.; Vestergaard, J.S.; Frette, X.; Lund, P.; Weisbjerg, M.R.; Kristensen, T.
The effect of toasting field beans and of grass-clover: maize silage ratio on milk production, milk composition and sensory quality of the milk was investigated in a 2*2 factorial experiment. Toasting of field beans resulted in lower contents in milk of both fat (44.2 versus 46.1 g/kg, P = 0.02) and protein (33.5 versus 34.2 g/kg, P = 0.008), whereas milk production and urea and somatic cell contents were unaffected compared with untreated field beans. Increasing the proportion of maize silage (from 2 to 5 kg DM/cow/day) in the ration decreased the content of urea in milk (P=0.002), whereas milk production and fat and protein contents were unaffected. Milk from cows fed the high proportion of maize silage had a lower (P=0.04) content of the long chain...
Tipo: Journal paper
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2009
URL: http://orgprints.org/16340/1/16340.pdf

Effect of water and citrate solubility on agronomic effectiveness of acidulated phosphates in three consecutive corn crops
Provedor de dados: 90
Autores: Prochnow,L. I.; van Raij,B.; Kiehl,J. C.
In the process of phosphate rock acidulation, several impure P compounds may be formed along with the desirable Ca and NH4 phosphates. Such compounds normally reduce the content of water-soluble P and thus the agronomic effectiveness of commercial fertilizers. In order to study this problem, a greenhouse experiment consisting of three consecutive corn crops was conducted in samples of a Red-Yellow Latosol (Typical Hapludox) in a completely randomized design (6 x 2 x 2), with four replicates. Six commercial fertilizers were added to 2 kg of soil at a rate of 70 mg kg-1 P, based on the content of soluble P in neutral ammonium citrate plus water (NAC + H2O) of the fertilizers. Fertilizer application occurred either in the original form or leached to remove...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Water-soluble P; Water-insoluble P; Acidulated P fertilizers; Maize.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832002000300018

Effect of water supplied to Bogor no.2 corn and Hegari no.13 at Mae Klong Yai Irrigation Experiment Station, 1974 dry season
Provedor de dados: 106
Autores: Pradit Ritruengdet.
6 tables
Palavras-chave: Corn; Maize; Sorghum; Water supply; Bogor no.2; Hegari no.13; Varieties; Mae Klong Yai irrigation; Dry season; Yields; ข้าวโพด; ข้าวฟ่าง; การใช้น้ำ; พันธุ์โบกอร์ 2; พันธุ์เฮกการี่ 13.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3840

Effect of weather on organic cropping systems in Kenya
Provedor de dados: 21
Autores: Birech, Mrs Rhoda; Freyer, Prof. Bernhard; Friedel, Prof. Juergen; Leonhartsberger, Mr. Philipp.
Rainfall is the single most important factor affecting yield and biomass accumulation by crops as well as residue decomposition in the tropics. The ability to capture this resource in organic systems calls for appropriate techniques. Kenya experiences bimodal type of rainfall with two rainfall peaks; the long (730 mm) and the short (376 mm) rains. Rainfall fluctuations in both seasons are becoming more common in the recent years with a likelihood of crop failure in one out of five years. The question addressed was how to utilize the short rains for food and biomass production. Lablab (Dolichos lablab), a N-fixing legume was sown in the short rains and the seeds harvested. The effect of lablab biomass incorporation on organic maize and potatoes planted in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems.
Ano: 2008
URL: http://orgprints.org/11974/2/Isofar_Paper_Birech_Freyer_Friedel_Leonhartsberger_2008.pdf

Effectiveness of Bacillus thuringiensis strains against Spodoptera frugiperda (lepidoptera: noctuidae)
Provedor de dados: 58
Autores: Polanczyk,Ricardo Antonio; Silva,Rogério Fernando Pires da; Fiuza,Lidia Mariana.
The fall armyworm (Spodoptera frugiperda) is one of the most important pests of maize, causing up to 20% production losses when defoliation occurs near to flowering, or even complete destruction of plants. Among the alternatives to control this pest, the use of Bacillus thuringiensis (Bt) has gained attention due to its efficiency and low impact on natural enemies. Strains Bt dendrolimus HD 37, Bt aizawai HD 68, Bt kurstaki HD 73, Bt darmstadiensis HD 146, and Bt thuringiensis 4412 were tested against second instar larvae in in vivo assays. Suspensions of Bt aizawai HD 68 and Bt thuringiensis 4412, containing 3 x 10(8) cells/ml, induced mortality of 100% and 80.4%, respectively. To test virulence, cell concentrations of 8 x 10(5) to 3 x 10(8) cells/ml of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacillus thuringiensis; Spodoptera frugiperda; Biological control; Bioassays; Fall armyworm.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000300003

Effectiveness of certain chemicals against downy mildew of corn
Provedor de dados: 106
Autores: Sawai Nuangpai; Somkiat Titatarn; Diloke Unchalisangkas; Niyom Chew-Chin.
1 table
Palavras-chave: Corn; Maize; Downy mildew; Fungicides; Glutinous corn; Seed treatment; Benalaxyl; Metalaxyl; ข้าวโพด; โรคราน้ำค้าง; สารป้องกันโรคราน้ำค้าง; การคลุกเมล็ด; ข้าวโพดข้าวเหนียว.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4579

Effectiveness of Mexican oregano essential oil from the Dominican Republic (Lippia graveolens) against maize pests (Sitophilus zeamais and Fusarium verticillioides)
Provedor de dados: 114
Autores: Peschiutta,M.L; Arena,J.S; Ramirez Sanchez,A; Gomez Torres,E; Pizzolitto,R.P; Merlo,C; Zunino,M.P; Omarini,A.B; Dambolena,J. S; Zygadlo,J. A.
The insecticidal and antifungal properties of Mexican oregano (Lippia graveolens) essential oil from the Dominican Republic were investigated under laboratory conditions against two main pests of stored grains: Sitophilus zeamais and Fusarium verticillioides. Although oregano essential oil at 600 &amp;#956;l/l air did not result in a significant mortality of S. zeamais after 24 hours of exposure by fumigation, this essential oil was a powerful acetylcholinesterase (AChE) inhibitor in vitro. One of the main components of oregano essential oil, p-cymene, presented fumigant toxicity and AChE inhibition activity against the maize weevil. The L. graveolens essential oil antifungal activity against F. verticillioides was evaluated at 50, 100 and 200 µl/l, and it...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acetylcholinesterase inhibition; Fungal pathogen; Lippia graveolens; Maize pest control; Maize weevil.
Ano: 2016
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2016000200003

Effects of 2,4-D and its combinations with triclopyr on control of purple nutsedge in corn
Provedor de dados: 106
Autores: Ngarmprasith, A.; Suwunnamek, U.
3 tables
Palavras-chave: Corn maize weed purple nutsedge 2; 4-D triclopyr weed control ข้าวโพด วัชพืช สารกำจัดวัชพืช แห้วหมู ทูโฟร์ดี ไตรโคลเพอร์.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4394

Effects of Agricultural Commercialization on Land Tenure, Household Resource Allocation, and Nutrition in the Philippines
Provedor de dados: 31
Autores: Bouis,   Howarth E.; Haddad,   Lawrence James.
Over the past several years IFPRI has undertaken research on the production, consumption, and nutrition effects of agricultural commercialization in The Gambia, Guatemala, Kenya, the Philippines, and Rwanda. While it is widely recognized that the commercialization of agriculture is essential to overall economic development, various rural population groups adapt differently to the process of commercialization, depending on the resources available to them, economic and social conditions, and government policies. Many households benefit in the form of higher incomes; others may suffer a decline in income. A particular concern of policymakers has been the effect of commercialization on nutrition. The purpose of these studies has been to analyze the process of...
Tipo: Report
Palavras-chave: Agriculture; Economic aspects; Philippines; Produce trade; Land tenure; Household; Nutrition; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Land Economics/Use.
Ano: 1990
URL: http://purl.umn.edu/42164

Effects of aluminum on the elongation and external morphology of root tips in two maize genotypes
Provedor de dados: 53
Autores: Souza,Leandro Torres de; Cambraia,José; Ribeiro,Cleberson; Oliveira,Juraci Alves de; Silva,Luzimar Campos da.
ABSTRACT The objective of this study was to evaluate the effects of toxic levels of aluminum (Al) on the growth and external morphology of root tips in two maize genotypes with differential Al tolerance. The maize genotypes UFVM-100 (Al-sensitive) and UFVM-200 (Al-tolerant) were treated with 0 and 50 mM Al in a 0.5 mM CaCl2 solution at pH 4.5; root elongation, Al content and the external morphology of the root tips were evaluated. Chemical analysis, hematoxylin staining and energy dispersive X-ray spectrometry (EDS) showed greater Al accumulation in the root tips of the UFVM-200 genotype. The inhibition of root elongation in the UFVM-100 genotype, however, was much stronger than in the UFVM-200 genotype. Both maize genotypes exhibited visible and intense...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aluminum tolerance; Root growth; Root morphology; Zea mays.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000100019

Effects of Arbuscular Mycorrhiza on Osmotic Adjustment and Photosynthetic Physiology of Maize Seedlings in Black Soils Region of Northeast China
Provedor de dados: 52
Autores: Xu,Hongwen; Lu,Yan; Zhu,Xiancan.
ABSTRACT To investigate the effect of arbuscular mycorrhiza fungi on maize growth, osmoregulation substances and photosynthetic physiology, a popular maize variety ZD 958 was measured under potted condition. Arbuscular mycorrhiza (AM) symbiosis promoted plant growth, and enhanced plant height, leaf length, mean leaf width and dry weight. Higher soluble sugar and protein, but lower proline concentrations were detected in AM seedlings than corresponding non-AM seedlings. Quantum yield of PSII photochemistry and potential photochemical efficiency increased by arbuscular mycorrhiza fungi, meanwhile, AM plants had lower primary fluorescence but higher maximal fluorescence and variable fluorescence than non-AM plants. AM enhanced apparent quantum efficiency,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arbuscular mycorrhiza; Maize; Osmotic adjustment; Light response curve.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100435

Effects of certain herbicides on field corn
Provedor de dados: 106
Autores: Umporn Suwunnamek; Surapol Chowchong.
1 table
Palavras-chave: Corn; Maize; Herbicides; Atrazine; Alachlor; Cyanazine; Weed control; ข้าวโพด; สารกำจัดวัชพืช; อาทราซีน; อะลาคลอร์; ไซยานาซีน.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3856

Effects of compost and digestate on environment and plant production – results of two research projects
Provedor de dados: 21
Autores: Fuchs, Jacques G.; Berner, Alfred; Mayer, Jochen; Schleiss, Konrad; Kupper, Thomas.
A yearly amount of 9.3x106t compost and digestate derived from separately collected organic waste is produced in the 25 European Union member states. The improvement of soil properties is a major benefit of compost application. However, little is known about the occurrence of organic pollutants in compost. In order to estimate the potential of Swiss composts and digestates to influence soil fertility and plant health, one hundred products representative for the different composting systems and qualities available on the Swiss market were analyzed in two research projects. In the first study, polycyclic aromatic hydrocarbons (PAHs), ortho substituted and dioxin-like polychlorinated biphenyls (PCBs, DL PCBs), polychlorinated dibenzo-p-dioxins and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology Composting and manuring Crop health; Quality; Protection.
Ano: 2008
URL: http://orgprints.org/17982/1/fuchs%2Detal%2D2008%2Dorbit.pdf

Effects of compost on corn charcoal stalk rot disease and its causal organism, Macrophomina phaseolina
Provedor de dados: 106
Autores: Vanlada Sunanthapongsuk; Pitayakon Limtong; Siangjeaw Piriyaprin; Prachaya Thunyadee; Prachum Jutawantana; Udom Pupipat.
7 ill.
Palavras-chave: Corn; Maize; Diseases; Charcoal stalk rot; Fungi; Composts; Macrophomina phaseolina; Growth; Yields; ข้าวโพด; ปุ๋ยหมัก; โรคลำต้นเน่า; คุณสมบัติทางเคมีและกายภาพของดิน; การเจริญเติบโต; ผลผลิต.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4260

Effects of Compost on Soil Fertility Parameters in Short-, Mid- and Long-Term Field Experiments
Provedor de dados: 21
Autores: Fuchs, J. G.; Fliessbach, A.; Mäder, Paul; Weibel, F.P.; Tamm, L.; Mayer, J.; Schleiss, K.
To evaluate the influence of compost on soil fertility and plant growth, several medium term and long term field experiments with composts were conducted in different crops.  In two maize experiments, one in a sandy and one in a loamy soil, the influence of different composts and digestates on soil parameters and plant growth were investigated. All products increased pH of the soil and improved the biological soil activity (e.g., enzymatic activities). Immature compost immobilized nitrogen and reduced plant growth. Organic nitrogen fertilizer added during cultivation, could compensate the growth depression.  A full factorial experiment in a 2-years-old organic apple orchard was conducted from 2001-2007. The factors tested in all 9 possible combinations...
Tipo: Journal paper
Palavras-chave: Soil quality; Composting and manuring; Fruit and berries.
Ano: 2014
URL: http://orgprints.org/36387/1/fuchs-etal-2014-ActaHort-1018-p39-46.pdf

Effects of conventionally bred and Bacillus thuringiensis (Bt) maize varieties on soil microbial biomass and activity
Provedor de dados: 21
Autores: Fließbach, Andreas; Messmer, Monika; Nietlispach, Bruno; Infante, Valentina; Mäder, Paul.
Genetically modified (GM) maize containing genes from the soil bacterium Bacillus thuringiensis (Bt) was cultivated on 29% of the total maize production area worldwide in 2009. Most studies to date compare Bt- maize varieties with their near isogenic lines; however, there is little information on the variability of conventional maize breeding lines and how the effects of Bt varieties are ranked within. In our study on the potential risks of Bt- maize varieties, we analyzed tissue quality and compared the effects of ten conventional and GM maize varieties on soil microbiological properties in a replicated climate chamber experiment. All maize varieties were cultivated twice in the same soil microcosm. Shoot yields and soluble C in leaf tissue of Bt...
Tipo: Journal paper
Palavras-chave: Soil; Environmental aspects.
Ano: 2012
URL: http://orgprints.org/21619/1/Fliessbach_2011_BFS.pdf

Effects of conventionally bred and Bacillus thuringiensis  (Bt) maize varieties on soil microbial biomass and activity
Provedor de dados: 21
Autores: Fliessbach, Andreas; Messmer, Monika; Nietlispach, Bruno; Infante, Valentina; Mäder, Paul.
Abstract  Genetically modified (GM) maize containing genes from the soil bacterium Bacillus thuringiensis (Bt) was cultivated on 29% of the total maize production area worldwide in 2009. Most studies to date compare Bt-maize varieties with their near isogenic lines; however, there is little information on the variability of conventional maize breeding lines and how the effects of Bt varieties are ranked within. In our study on the potential risks of Bt-maize varieties, we analyzed tissue quality and compared the effects of ten conventional and GM maize varieties on soil microbiological properties in a replicated climate chamber experiment. All maize varieties were cultivated twice in the same soil microcosm. Shoot yields and soluble C in leaf tissue of Bt...
Tipo: Journal paper
Palavras-chave: Soil biology Cereals; Pulses and oilseeds Breeding; Genetics and propagation.
Ano: 2011
URL: http://orgprints.org/19991/1/Fliessbach_2011_BFS.pdf

Effects of decoupling on land use: an EU wide, regionally differentiated analysis
Provedor de dados: 31
Autores: Britz,   Wolfgang; Heckelei,   Thomas; Perez Dominguez,   Ignacio.
This paper presents a quantitative analysis of the impacts of the „Luxembourg Compromise” as compared to a continuation of Agenda 2000 to the year 2010. The employed new version of the CAPRI model allows us to represent the different member states’ implementations of the CAP reform and to reflect endogenous world market prices based upon a spatial global trade model. The specific contribution of the analysis is a detailed look at the impacts of national differences in the CAP implementation and regional production structures with respect to changes in land allocation. At EU level, cereal areas decrease by about 5% and oilseeds by about 3%. This is paralleled by increases in the set-aside acreage and extensive fodder production. However, significant...
Tipo: Journal Article
Palavras-chave: Decoupling; Agricultural sector modelling; Luxembourg Agreement; Land allocation; Agricultural and Food Policy; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/97188

Effects of detasselling on corn yield
Provedor de dados: 106
Autores: Auranuj Kongkanjana; Watchara Choonhawong; Boonsom Meksongsee.
1 table
Palavras-chave: Corn; Maize; Yields; De-tassel; Stem borers; Ostrinia furnacalis; ข้าวโพด; การถอดยอด; ผลผลิต.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4570

Effects of different management systems on porosity of oxisols in Paraná, Brazil
Provedor de dados: 90
Autores: Tavares Filho,João; Tessier,Daniel.
Soils play a fundamental role in the production of human foods. The Oxisols in the state of Paraná are among the richest and most productive soils in Brazil, but degradation and low porosity are frequently documented, due to intensive farming involving various management strategies and the application of high-tech solutions. This study aims to investigate changes in the porosity of two Red Oxisols (Latossolos Vermelhos), denoted LVef (eutroferric) and LVdf (dystroferric) under conventional and no-tillage soil management, with a succession of annual crops of soybean, maize and wheat over a continuous period of more than 20 years. After describing the soil profiles under native forest, no-tillage management and conventional tillage using the crop profile...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil structure; Crop profile method; No-tillage; Conventional tillage.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300031

Effects of different sources of nitrogenous fertilizer on Guatemala corn yields
Provedor de dados: 106
Autores: Phaderm Titatan; Samnao Phetchawee.
1 table
Palavras-chave: Corn; Maize; Guatemala corn; Nitrogen fertilizers; Nitrogen source; Yields; ข้าวโพด; พันธุ์กัวเตมาลา; ผลผลิต; ปุ๋ยไนโตรเจน; แหล่งไนโตรเจน.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3733

Effects of digestate from anaerobic digested cattle slurry and plant materials on soil microbiota and fertility
Provedor de dados: 21
Autores: Johansen, Anders; Carter, Mette S.; Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Ambus, Per.
Anaerobic digestion of animal manure and crop residues may be employed to produce biogas as a climate-neutral source of energy to provide fertilizers which allow recycling of plant nutrients on the farm. However, compared to fertilizing with the pristine input materials (e.g. raw animal slurry or plant residues), the effect on soil microbiota and soil fertility may be impacted due to the increased content of mineral nitrogen (N) and decreased amount of organic carbon (C); an issue of concern in especially organic farming systems.  An incubation study was performed where 1) water, 2) raw cattle slurry, 3) anaerobically digested cattle slurry + maize, 4) anaerobically digested cattle slurry + grass-clover, or 5) fresh grass-clover was applied to soil at...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/20446/4/20446.pdf

Effects of digestate from anaerobic fermented cattle slurry and plant materials on soil microbiota and fertility
Provedor de dados: 21
Autores: Johansen, Anders; Carter, Mette S.; Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Ambus, Per.
Soil from the Højbakkegård experimental (BioConcens) field  was amended with nothing (control), each of two anaerobic digested (AD) materials (mixture of AD cattle manure and maize, mixture of AD cattle manure and cut off grass-clover material), raw cattle manure, and grass-clover in five individual treat-ments. The materials were incorporated homogeneously into the soil and sampled destructively at 0, 1, 3 and 9 days after incorporation. Besides, experiments were performed to follow the turnover of these materials, measured as accumulated respiration over a longer period. Measures included available organic soil carbon (cold- and hot-water extractable), soil mineral nitrogen concentration, soil pH, accumulated respiration over a two-week period, emission...
Tipo: Journal paper
Palavras-chave: Soil quality; Nutrient turnover; Air and water emissions; Biodiversity and ecosystem services; Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/18894/7/18894.pdf

Effects of easy soluble carbohydrate and bacterial inoculant supplementations on silage quality of frosted maize
Provedor de dados: 2
Autores: Konca, Yusuf; Beyzi, Selma Buyukkilic; Paffetti, Maria Asuncion Gallardo; Ulger, Ismail; Sohel, Mohammad Mahmodul Hasan.
The present experiments were conducted to assess the effects of barley, Lactobacillus bacteria and lactic acid bacteria (LAB) and enzyme mixture supplementations on chemical composition and some quality parameters of naturally frosted maize silage. The treatments were as follows; T1: Control (no supplementation, C); T2: barley 20 g kg-1, B20; T3: barley 40 g kg-1, B40; T4: 1.5 g ton-1, a mixture of LAB; and T5: 2 g ton1, a mixture LAB+enzyme, LEN. Barley supplementation to frosted maize increased dry matter (DM) (p &lt; 0.01). The pH value was higher in LAB group (p &lt; 0.01). Treatments supplemented LAB and LEN significantly reduced crude protein contents (p &lt; 0.001). Lactic acid contents decreased in all treatments as compared to control group and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal Science  Feed Science cold; Plant killing; Silage additives; Organic acids; Fleig point.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/39513

Effects of ensiling density on nutritive value of maize and sorghum silages
Provedor de dados: 96
Autores: Sucu,Ekin; Kalkan,Hatice; Canbolat,Onder; Filya,Ismail.
ABSTRACT Studies were conducted to determine the effects of different ensiling densities on fermentation, aerobic stability, and nutritive value of maize and sorghum silages. Maize and sorghum were harvested at dough (363 g/kg) and milk stages (275 g/kg), respectively. Herbages were chopped approximately 1.5 cm after harvest and then ensiled in mini silos at high and low-bulk densities for 8.5 weeks. Different bulk densities were achieved by ensiling different weights of herbage in the fixed-volume mini silos (1.5-L anaerobic jars, Weck, Germany). The obtained dry matter (DM) densities were 168 and 216 kg of DM/m3 for maize forage and 132 and 178 kg of DM/m3 for sorghum forage. Fermentation kinetics, the rate of aerobic deterioration upon aerobic exposure,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cereals; Nutritional profile; Packing density; Silage.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001000596

Effects of full-scale substrate pretreatment with a cross-flow grinder on biogas production
Provedor de dados: 111
Autores: Mönch-Tegeder, Matthias; Lemmer, Andreas; Jungbluth, Thomas; Oechsner, Hans.
The enhancement of the degradation rate of energy crops, agricultural residues and manure by different lab scale pretreatment pathways is shown in previous studies.  In general, the pretreatments resulted in higher degradation efficiencies and an increase in methane yield for lignocellulosic and fibrous biomass.  The major drawback of most of the different pretreatment methods is that either they are not feasible for application in practice or the high energy demand makes them economically inefficient.  The aim of this study was to evaluate the effects of a full-scale mechanical pretreatment with a cross-flow grinder on commonly used energy crops (maize silage, grass silage and rye grain silage) and horse manure. Furthermore, the optimal treatment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaerobic digestion; Biogas production; Mechanical pretreatment; Lignocellulosic materials; Horse manure.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2927

Effects of Government Maize Marketing and Trade Policies on Maize Market Prices in Kenya
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Meyers,   Robert J.; Nyoro,   James K.
The objectives of this paper are to determine the effects of NCPB maize trading activity and the maize import tariff on wholesale maize market price levels and volatility. The analysis uses monthly maize price and trade data covering the period January 1990 to September 2004. Results are based on a vector autoregression (VAR) approach that allows estimation of a counterfactual set of maize prices that would have occurred over the 1990-2004 period had the NCPB not existed and trade restrictions been removed. Assessed are the separate impacts of policy on wholesale prices in Kitale, a major surplus-producing area, and Nairobi, the major urban demand center in the country.
Tipo: Working or Discussion Paper
Palavras-chave: Food Security; Food Policy; Maize Marketing Trade Policies; Kenya; Crop Production/Industries; Marketing; Q18.
Ano: 2005
URL: http://purl.umn.edu/55162

Effects of green-manure and organic fertiliser on organic maize (Zea Mays L.) in south Tuscany
Provedor de dados: 21
Autores: Mazzoncini, Marco; Migliorini, Paola; Antichi, Daniele; Vazzana, Concetta.
Green-manure in Mediterranean stockless organic farms is a useful tool to improve nitrogen availability, reduce production cost and conserve soil fertility. A 2-year on farm research was carried out in Tuscany (Italy) to evaluate the effect of 3 different green manures (Hordeum v. + Avena s. mixture, Trifolium s. + Avena s. mixture, Vicia faba var. minor) and 2 levels of organic N fertilization (0 and 120 Kg N ha-1) on maize in 2004 and 2005. Green manures were ploughed into the soil in April 2004 and organic fertiliser was applied before sowing; neither green manure nor fertilizers were applied in 2005 to evaluate the residual effect of the treatments. The effect of the distribution of organic fertilizer was not efficient in comparison to green-manure....
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Composting and manuring.
Ano: 2008
URL: http://orgprints.org/12010/1/Mazzonchini_12010_ed.doc

Effects of ground cover from branches of arboreal species on weed growth and maize yield
Provedor de dados: 124
Autores: Silva,Paulo Sérgio Lima e; Oliveira,Vianney Reinaldo de; Silva,Paulo Igor Barbosa e; Chicas,Larissa da Silva; Tomaz,Francisco Linco de Souza.
ABSTRACTCultivating maize under systems of alley cropping results in improvements to the soil, a reduction in weeds and an increase in yield. Studies using ground cover from tree shoots produce similar results. The aim of this study was to evaluate the effects on weed growth and maize yield of ground cover made up of 30 t ha-1 (fresh matter) of branches from the tree species: neem (Azadirachta indica A. Juss), gliricidia [Gliricidia sepium(Jacq.) Kunth ex Walp.], leucaena [Leucaena leucocephala (Lam.) de Wit.] and sabiá (Mimosa caesalpiniifolia Benth.). Two treatment groups (cultivars and weed control) were evaluated. The cultivars AG 1041 and AL Bandeirantes were subjected to the following treatments: no hoeing, double hoeing, and ground a cover of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Azadirachta indica; Gliricidia sepium; Leucaena leucocephala; Mimosa caesalpiniifolia; Hoeing; Green corn.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000400809

Effects of groundnut shells on soil properties, growth and yield of maize
Provedor de dados: 111
Autores: BAKO, TANKO; MAMAI, EZEKIEL AMBO; ISTIFANUS, AKILA BARDEY.
The aim of the study was to assess the effects of groundnut shells on soil properties, growth and yield of maize. The study was carried out in Jalingo, Taraba State, North-Eastern Nigeria in July, 2019. Treatments in the study were four doses of groundnut shells (0.0, 2.5, 5.0 and 7.5 t ha-1); arranged in a randomized complete block design, replicated four times. Each plot was 2.0 m × 2.0 m with 0.5 m gap between the plots and replicates. Crushed groundnut shells were applied on a dry matter basis at the rates of 0, 2.5, 5.0 and 7.5 t ha-1 28 days before planting maize. Seeds were planted on prepared land treated with crushed groundnut shells. Soil properties were determined at harvest, maize growth parameters were determined at 50% flowering and maize...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Groundnut shell; Incorporation Rates; Maize; Organic.
Ano: 2022
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7211

Effects of herbicides on field corn (Suwan 1)
Provedor de dados: 106
Autores: Umporn Suwunnamek.
1 table
Palavras-chave: Corn; Maize; Herbicides; Suwan 1; Weed control; Yields; ข้าวโพด; สารกำจัดวัชพืช; พันธุ์สุวรรณ 1.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3830

Effects of increasing fertilization in organic farming fodder cultivation and market crop systems
Provedor de dados: 21
Autores: Kolbe, Hartmut.
In 1992, on experimental stations of the Saxony State Institute of Agriculture, two organic field trials were set up on loamy sand and a loess loam in western Saxony, eastern Germany. In these long-term field trials questions of fodder cultivation and market crop systems, crop rotations with legume-grass, wheat and maize, different organic fertilizer regimes and nutrient cycling were analyzed regarding their effects on soil fertility, yield and quality of the plant products. The main results and conclusions of the first nine years of these organic field trials are introduced and summarized here.
Tipo: Report
Palavras-chave: Nutrient turnover Cereals; Pulses and oilseeds Crop combinations and interactions Education; Extension and communication Root crops Soil quality Composting and manuring.
Ano: 2007
URL: http://orgprints.org/11139/1/kolbe%2D2007%2Dlong%2Dterm.pdf

Effects of increasing the farm produced content in organic feeds on pig performances
Provedor de dados: 21
Autores: Royer, E.; Cazaux, J.G.; Maupertuis, F.; Crepon, K.; Albar, J.
In three experimental facilities (Exp.1, 2 and 3), two organic diets, one complex including processed feedstuffs as wheat bran and heat-treated soya beans (control), the other simplified and containing over 80 % of cereal and pulses (CP), were compared for growing-finishing pigs. The base components of the CP diets were moist maize grain, wheat and faba beans in Exp.1, triticale plus coloured-flowered peas in Exp.2, and triticale, oats, white-flowered peas and faba beans in Exp.3. The diets were formulated with similar energetic values and a lysine content (0.70 g ileal digestible lysine /MJ NE) 20 % lower than the conventional mean requirement for growing pigs. However, the CP diet had a lysine proportion 30% lower than requirement in Exp.1 and did not...
Tipo: Conference paper, poster, etc.
Palavras-chave: Feeding and growth.
Ano: 2009
URL: http://orgprints.org/16609/4/Royer_2009_orgprint.pdf

Effects of Maize Marketing and Trade Policy on Price Unpredictability in Zambia
Provedor de dados: 31
Autores: Chapoto,   Antony; Jayne,   Thomas S.
As events in the 2008/09 season have amply demonstrated, instability in staple food market                         remains a major problem in Zambia. A rise in world food price levels and instability, which is                                      projected to occur in the near future according to several international institutes, will make it                                      all more important for developing countries to consider the strengths and weaknesses of                                      alternative approaches for buffering their domestic food systems from potential high volatility                                      in world markets.                                       These findings suggest that promoting more “rules based” approaches to...
Tipo: Report
Palavras-chave: Zambia; Maize; Trade; Price; Crop Production/Industries; Marketing; Q11.
Ano: 2009
URL: http://purl.umn.edu/54499

Effects of Market Reform on Access to Food by Low-Income Households: Evidence from Four Countries in Eastern and Southern Africa
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Rubey,   Lawrence; Tschirley,   David L.; Mukumbu,   Mulinge; Chisvo,   Munhamo; Santos,   Ana Paula; Weber,   Michael T.; Diskin,   Patrick K.
This report analyzes the effects of grain market reform and food subsidy elimination in Eastern and Southern Africa on access to food for low-income consumers. The report also assesses the potential to use "self-targeted commodities" to improve vulnerable groups access to food though market development strategies and food aid programs. While much research has been devoted to understanding how producers and traders would respond to reform of staple food markets, relatively little is known about the potential or actual responses by consumers. The report presents recent findings from six household-level surveys in urban areas of Zimbabwe, Kenya, Zambia, and Mozambique between 1991 and 1994. Secondary data from South Africa and Malawi are also presented where...
Tipo: Report
Palavras-chave: Food Security and Poverty; Marketing; Downloads July 2008 - June 2009: 12.
Ano: 1995
URL: http://purl.umn.edu/54052

Effects of mixing red clover and maize silages on milk production and whole-body N partitioning in dairy cows
Provedor de dados: 21
Autores: Moorby, Dr J. M.; Ellis, Miss N. M.; Fisher, Mr W. J.; Davies, Mr D. W. R.; Davies, Dr D. R.
Twenty-four multiparous Holstein-Friesian dairy cows in mid lactation were used in a 33 Latin square changeover experiment with three 4-week periods to investigate the effect of altering the ratios of red clover (RC) silage and maize silage in the forage component of their diet.  Ratios (in the dry matter (DM)) were: RC10, 0.1 RC:0.9 maize; RC50, 0.5 RC:0.5 maize; RC90, 0.9 RC:0.1 maize.  All cows received ad libitum access to their allocated forage with 4 kg of a standard concentrate per day.  Whole-body N partitioning and whole-tract diet digestibility measurements were carried out using a subset of cows (n=9).  Results are presented in order of RC10, RC50 and RC90 respectively.  Feed DM intakes (19.6, 20.5, 19.5 kg DM d-1, s.e.d. 0.32, P&lt;0.01) and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Feeding and growth.
Ano: 2008
URL: http://orgprints.org/11756/1/Moorby_11756_ed.doc

Effects of N and P fertilizers on the behaviour of baby corn
Provedor de dados: 106
Autores: Amnat Suwanarit; Sodsai Changsaluk.
10 ill.
Palavras-chave: Corn; Maize; Baby corn; NP fertilizers; Corn growth; ข้าวโพดฝักอ่อน; การเจริญเติบโต; ผลผลิต; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสฟอรัส.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4251

Effects of N fertilizer applied at different times and by different methods at different soil fertility levels and application rates on maize
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sukum Chotechuangmanirat.
Palavras-chave: Corn; Maize; N fertilizers; Soil fertility; Fertilizer application rate; Fertilizer application time; ข้าวโพด; ปุ๋ยไนโตรเจน; ความอุดมสมบูรณ์ของดิน; อัตราปุ๋ย; ระยะเวลาใส่ปุ๋ย; ผลผลิต.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4401

Effects of Pig Slurry Application and Crops on Phosphorus Content in Soil and the Chemical Species in Solution
Provedor de dados: 90
Autores: De Conti,Lessandro; Ceretta,Carlos Alberto; Ferreira,Paulo Ademar Avelar; Lorensini,Felipe; Lourenzi,Cledimar Rogério; Vidal,Renan Fagan; Tassinari,Adriele; Brunetto,Gustavo.
The application of pig slurry rates and plant cultivation can modify the soil phosphorus (P) content and distribution of chemical species in solution. The purpose of this study was to evaluate the total P, available P and P in solution, and the distribution of chemical P species in solution, in a soil under longstanding pig slurry applications and crop cultivation. The study was carried out in soil columns with undisturbed structure, collected in an experiment conducted for eight years in the experimental unit of the Universidade Federal de Santa Maria (UFSM), Santa Maria (RS). The soil was an Argissolo Vermelho distrófico arênico (Typic Hapludalf), subjected to applications of 0, 20, 40, and 80 m3 ha-1 pig slurry. Soil samples were collected from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic wastes; Soil solution; Chemical speciation; Visual Minteq.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000300774

Effects of plant densities and planting dates on some agronomic characteristics and grain yield of field corn varieties
Provedor de dados: 106
Autores: Prakob Jan-Aram; Prasop Depyasuvarn; Kemchart Chaiyarat; Amnuay Tongdee; Narongsak Senanarong.
1 table
Palavras-chave: Corn; Maize; Plant density; Planting date; Grain yield; Yield trial; ข้าวโพด; ระยะปลูก; วันปลูก; ผลผลิตเมล็ด; การทดสอบผลผลิต.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4246

Effects of plant population and nitrogen fertilizer on yield and efficiency of maize-bean intercropping
Provedor de dados: 86
Autores: Morgado,Luiz Balbino; Willey,Robert William.
Nitrogen supply and plant population are basic parameters for cereal-legume intercropping. In order to study plant population and nitrogen fertilizer effects on yield and yield efficiency of maize-bean intercropping, a field experiment was established. Three bean plant populations and three nitrogen levels were used. Maize dry matter accumulation decreased with increases in bean plant population. Competitive effect of intercrop beans on maize yields was high at higher plant populations, being decreased by nitrogen fertilizer; application of 50 kg ha-1 N was very efficient in increasing maize cob yield. Intercropping significantly decreased harvest index of beans in all plant population and nitrogen fertilizer situations. The efficiency of intercropping,...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Zea mays; Phaseolus vulgaris; Mixed cropping; Land use.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003001100002

Effects of plant spacing and N-fertilizer on crop yields, N2-Fixation, N-Transferred to corn, and carry-over effects of corn-groundnut intercrops
Provedor de dados: 106
Autores: Amnat Suwanarit; Jitima Yathapootanont; Sodsai Changsaluk; Chairerk Suwannarat.
7 tables
Palavras-chave: Corn; Maize; Groundnuts; Plant spacing; N fertilizers; Yields; N2 fixation; N transfer; Cropping systems; Carry-over effect; ข้าวโพด; ถั่วลิสง; ระบบการปลูกพืช; ระยะปลูก; ปุ๋ยไนโตรเจน; ผลผลิต; การตรึงไนโตรเจน; การเคลื่อนย้ายไนโตรเจน.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4354

Effects of preplant herbicides applied for control of purple nutsedge (Cyperus rotundus) on growth and yield of corn (Zea mays)
Provedor de dados: 106
Autores: Umporn Suwunnamek; Suthep Thongma.
10 tables
Palavras-chave: Corn; Maize; Weeds; Pre-plant herbicides; Yields; Growth; Purple nutsedge; Cyperus rotundus; ข้าวโพด; แห้วหมู; การเจริญเติบโต; สารกำจัดวัชพืชแบบก่อนปลูก.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4299

Effects of red clover and maize silages on the carriage of gut pathogens in steers
Provedor de dados: 21
Autores: Marley, Dr C.L.; Scott, M.B.; Bakewell, E.L.; Leemans, D.K.; Sanderson, R.; Davies, Dr D.R.
An experiment investigated the effects of increasing proportions of red clover (RC) (Trifolium pratense) silage relative to maize (M) (Zea mays) silage in the diet of steers on the pathogenic microflora of gut digesta and faecal samples. The experiment consisted of 3 periods of 21 d. Eight Hereford x Friesian steers were used, with 4 maintained on a 90 % maize: 10 % red clover (90M:10RC) silage diet throughout and 4 receiving 90M:10RC silage in period 1 then 50M:50RC, 10M:90RC in periods 2-3, respectively. Populations of Listeria monocytogenes and E. coli were enumerated at time points in each period. L. monocytogenes data showed disparity between periods. In the latter part of period 2, L. monocytogenes populations were higher in the rumen, duodenum and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Feeding and growth.
Ano: 2008
URL: http://orgprints.org/12615/1/Marley_12615_ed.doc

Effects of salt stress on plant growth, stomatal response and solute accumulation of different maize genotypes
Provedor de dados: 61
Autores: Azevedo Neto,André Dias de; Prisco,José Tarquinio; Enéas-Filho,Joaquim; Lacerda,Claudivan Feitosa de; Silva,José Vieira; Costa,Paulo Henrique Alves da; Gomes-Filho,Enéas.
Seeds from eight different maize genotypes (BR3123, BR5004, BR5011, BR5026, BR5033, CMS50, D766 and ICI8447) were sown in vermiculite, and after germination they were transplanted into nutrient solution or nutrient solution containing 100 mmol.L-1 of NaCl and placed in a greenhouse. During the experimental period plant growth (dry matter, shoot to root dry mass ratio, leaf area, relative growth rate, and net assimilation rate), leaf temperature, stomatal conductance, transpiration, predawn water potential, sodium, potassium, soluble amino acids and soluble carbohydrate contents were determined in both control and salt stressed plants of all genotypes studied. Salt stress reduced plant growth of all genotypes but the genotypes BR5033 and BR5011 were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth analysis; Osmoregulation; Salinity; Transpiration; Zea mays; Water relations.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202004000100005

Effects of silage or probiotics on performance and gut microbial composition of organic growing-finishing pigs
Provedor de dados: 21
Autores: Nagel, MSc Philipp; Domig, PhD Konrad J.; Hagmüller, PhD Werner; Pfalz, MSc Silvia; Kronsteiner, MSc Sophie; Ortner, Birgit; Sundrum, PhD Albert; Zollitsch, PhD Werner.
This paper will deal with the effects of the oral application of a probiotic preparation (Bifidobacterium animalis) and of the provision of forage (maize and grass silage) to growing-finishing pigs on the composition of the intestinal microbial population and faecal microflora as an important determining factor for pork safety. 76 pigs were reared in 4 different dietary treatments. Clinical health and immune status plus faeces samples and samples of the gut content from the duodenum, ileum, caecum and colon were collected from each animal. Since the second round of the feeding experiment was only finished in March, the datasets are still incomplete because analyses are ongoing, but preliminary results are already available. Microbial analysis showed that...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Health and welfare Feeding and growth.
Ano: 2008
URL: http://orgprints.org/11787/1/Nagel_11787_ed.doc

EFFECTS OF SILICON ON ALLEVIATING ARSENIC TOXICITY IN MAIZE PLANTS
Provedor de dados: 90
Autores: Silva,Airon José da; Nascimento,Clístenes Williams; Gouveia Neto,Artur da Silva; Silva Junior,Elias Arcanjo.
Arsenic is a metalloid highly toxic to plants and animals, causing reduced plant growth and various health problems for humans and animals. Silicon, however, has excelled in alleviating stress caused by toxic elements in plants. The aim of this study was to investigate the effects of Si in alleviating As stress in maize plants grown in a nutrient solution and evaluate the potential of the spectral emission parameters and the red fluorescence (Fr) and far-red fluorescence (FFr) ratio obtained in analysis of chlorophyll fluorescence in determination of this interaction. An experiment was carried out in a nutrient solution containing a toxic rate of As (68 μmol L-1) and six increasing rates of Si (0, 0.25, 0.5, 1.0, 1.5, and 2.0 mmol L-1). Dry matter...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heavy metals; Metalloids; Photosynthetic pigments; Trace element.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100289

Effects of soil fertility on comparative yields and nutritional characteristics of corn and sorghum cultivars
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Jettada Makhasuwanarojn.
Palavras-chave: Corn; Maize; Sorghum; Soil fertility; Yields; Nutritive value; ข้าวโพด; ข้าวฟ่าง; ผลผลิต; ความอุดมสมบูรณ์ของดิน; ธาตุอาหารในดิน.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4598

Effects of some insecticides on the egg parasites of the corn borer in laboratory
Provedor de dados: 106
Autores: Auranuj Kongkanjana; Watchara Choonhawong; Boonsom Meksongsee.
1 table
Palavras-chave: Corn; Maize; Borers; Insecticides; Egg parasite; ข้าวโพด; หนอนเจาะลำต้น; แมลงศัตรูธรรมชาติ.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4571

Effects of some soil managements on soil moisture retention and on the growth of corn and mungbeans
Provedor de dados: 106
Autores: Kubota, Toru; Prateep Verapattananirund; Thirapong Piyasiranond; Pongpit Piyapongse.
Palavras-chave: Corn; Maize; Mungbeans; Mulching; Tillage; Soil moisture content; Soil management; Growth; Yields; ข้าวโพด; ถั่วเขียว; ความชื้นในดิน; การจัดการดิน.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3929

Effects of surface application of dolomitic limestone and calcium-magnesium silicate on soybean and maize in rotation with green manure in a tropical region
Provedor de dados: 53
Autores: Castro,Gustavo Spadotti Amaral; Crusciol,Carlos Alexandre Costa.
Although lime is currently the material most frequently used to ameliorate soil acidity in Brazil, silicate could efficiently replace this source because of its greater solubility and its greater silicon content, which are beneficial for plant development. This study aimed to evaluate the effects of superficial lime and silicate application on soil chemical attributes as well as on soybean and maize nutrition and grain yields when these crops are grown in rotation with green manure. The experimental design was a complete randomized block with sixteen replicates. Plots were treated with one of two materials for acidity correction (dolomitic lime and calcium/magnesium silicate) or with no soil correction, as a control. Silicate corrected soil acidity and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil acidity correction; Crop yield; Silicon; Mineral nutrition; No tillage.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000300311

Effects of the application of sewage sludge and fowl manure on soils of Paraná state in maize plants (Zea mays L.) as a macro-nutrients source
Provedor de dados: 52
Autores: Gobbi,Marlene A.; Pigozzo,Ana T. Jordão; Lenzi,Ervim; Luchese,Eduardo B.
The potential of two organic residues as sources of macro-nutrients in three types of soils of the third plateau of Paraná state was studied. Treatment consisted of a dose (38 t.ha-1) of fowl manure and sewage sludge neutralized by a 3:1 (CaO+MgO) mixture. Fowl manure was kept in natura. Maize (Zea mays L.)was reference plant. After 30 days of seeding, the aerial parts of the plants were cut. They were dried at 70 0C till constant weight was obtained, then weighted and ground. Analyses were undertaken after nitric-perchloric digestion of the samples. Macro-nutrient levels in soils and in plants were determined by atomic absorption spectrometry, flame technique. Results showed that production of dry matter was higher when fowl manure was used. Levels of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sewage sludge; Macro-nutrients; Maize culture; Soil fertility.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200003

Effects of the application of sewage sludge and petrochemical residue in maize culture as source of micro-nutrients on soils of Paraná state
Provedor de dados: 52
Autores: Pigozzo,Ana T. Jordão; Gobbi,Marlene A.; Lenzi,Ervim; Luchese,Eduardo B.
An evaluation of the potential of two organic residues as source of micro-nutrients in three soils of Paraná state was studied. Treatments consisted of one dose (38 t.ha-1) of sewage sludge and residue of purified used motor oil both neutralized with CaO+MgO mixture in 3:1 rate. Maize (Zea mays L.) was used as reference plant. After 30 days of seeding, the aerial parts of the plants were cut. They were dried at 70ºC till constant weight and ground. Analysis was undertaken after nitric-perchloric digestion. Micro-nutrients levels in the soils and in the aerial parts of the plants were determined by atomic absorption spectrometry. The results showed a production of the aerial parts of the plants treated with sewage sludge higher than those in other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sewage sludge; Oil residue; Environmental pollution; Micro-nutrients.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000200002

Effects of the decoupling of the subsidies on agricultural water productivity
Provedor de dados: 31
Autores: Lorite,   I.J.; Arriaza Balmón,   Manuel.
In this work several performance indicators such as the Annual Relative Irrigation Supply (ARIS) and the Irrigation Water Productivity (IWP), have been considered to evaluate the changes in the cotton irrigation management due to the decoupling of the European Union Subsidies. For this purpose, a modern irrigation scheme, the Genil–Cabra Irrigation Scheme (GCIS) located in Southern Spain, has been selected. The total irrigated area is 6,900 ha with wheat, olive and cotton as the main crops. The irrigation season 2004/05 was the period when the crop pattern and water management trend changed dramatically. From this year to the present the area cultivated with crops with high water requirements like cotton, sugar beet and maize has been reduced almost by...
Tipo: Conference Paper or Presentation
Palavras-chave: CAP Subsidies; Irrigation; Arable Crops; Spain; Agricultural and Food Policy; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/44017

Effects of tillage methods and nitrogen fertilizers on soil water use by corn and corn yields
Provedor de dados: 106
Autores: Seri Sookhakich; Pornprom Chairittichai; Prasong Banthao.
2 ill., 3 tables
Palavras-chave: Corn; Maize; Tillage methods; Nitrogen fertilizers; Soil water use; Yields; ข้าวโพด; วิธีการไถพรวน; ปุ๋ยไนโตรเจน; การใช้น้ำในดิน.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4027

Effects of times and methods of N-fertilizer placement on yields and fertilizer utilization of corn-mung bean intercrops as indicated by 15N
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Sukum Chotechuangmanirat.
1 ill., 3 tables
Palavras-chave: Corn; Maize; Mungbeans; Nitrogen fertilizers; N15; Yields; Fertilizer utilization; Intercropping; ข้าวโพด; ปุ๋ยไนโตรเจน; ไนโตรเจน 15; ถั่วเขียว; ระบบการปลูกพืช; ระบบการปลูกพืชแบบสลับ.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4105

Effects of Trade Liberalization on Agriculture in China: Commodity Aspects
Provedor de dados: 31
Autores: Huang,   Jikun; Chen,   Chunlai.
This book analyzes commodity aspects of the effects of trade liberalization on agriculture in China. The study describes the effects of trade liberalization on selected commodities namely rice, wheat, maize, soybean, sweet potato, potato, other grains, pork, beef, mutton, poultry, egg, milk and fish at the national level and farm level. The analysis included ex-ante and ex-post welfare gain and loss at the national level and profitability at the farm level.
Tipo: Report
Palavras-chave: Trade liberalization; Agricultural products; Production; Consumption; International Relations/Trade.
Ano: 1999
URL: http://purl.umn.edu/32665

Effects of Trade Liberalization on Agriculture in China: Institutional and Structural Aspects
Provedor de dados: 31
Autores: Huang,   Jikun; Chen,   Chunlai.
This book analyzes institutional and structural aspects of the effects of trade liberalization on agriculture in China. The study stresses the analysis of trade-related policies, physical infrastructure, institutions and performance in international trade. It discusses such commodities as rice, maize, soybean, peanuts, frozen pork, canned food, raw silk, wheat, vegetable oils, sugar and raw wool. This book gives readers a general view of trade liberalization in China.
Tipo: Report
Palavras-chave: Trade policies; Trade; Trade liberalization; International Relations/Trade.
Ano: 1999
URL: http://purl.umn.edu/32722

Effects of Trade Liberalization on Agriculture in India: Commodity Aspects
Provedor de dados: 31
Autores: Chand,   Ramesh.
This book analyzes commodity aspects of the effects of trade liberalization on agriculture in India. The study describes the effects of trade liberalization on selected commodities namely rice, maize, rapeseed-mustard and chickpea at the national level and farm level. The analysis included ex-ante and ex-post welfare gain and loss at the national level and profitability at the farm level.
Tipo: Report
Palavras-chave: Trade liberalization; Production; Marketing; Trade policies; Agricultural products; International Relations/Trade.
Ano: 1999
URL: http://purl.umn.edu/32688

Effects of Trade Liberalization on Agriculture in Indonesia: Commodity Aspects
Provedor de dados: 31
Autores: Erwidodo; Hadi,   Prajogo U.
This book analyzes commodity aspects of the effects of trade liberalization on agriculture in Indonesia. The study describes the effects of trade liberalization on selected commodities namely rice, soybean, maize, cassava and potato at the national level and farm level. The analysis included ex-ante and ex-post welfare gain and loss at the national level and profitability at the farm level.
Tipo: Report
Palavras-chave: Production; Marketing; Trade policies; Trade liberalization; Agricultural products; International Relations/Trade.
Ano: 1999
URL: http://purl.umn.edu/32685

Effects of Trade Liberalization on Agriculture in Malaysia: Institutional and Structural Aspects
Provedor de dados: 31
Autores: Tengku Ahmad,   Tengku Mohd Ariff.
This book analyzes institutional and structural aspects of the effects of trade liberalization on agriculture in Malaysia. The study stresses the analysis of trade-related policies, physical infrastructure, performance in international trade. It discusses such commodities as rice, maize, soybean, wheat, tobacco, palm oil, rubber, cocoa, pepper, saw logs and sawn timber. This book gives readers a general view of trade liberalization in Malaysia.
Tipo: Report
Palavras-chave: Trade policies; Trade; Trade liberalization; International Relations/Trade.
Ano: 1998
URL: http://purl.umn.edu/32709

Effects of Trade Liberalization on Agriculture in Pakistan: Commodity Aspects
Provedor de dados: 31
Autores: Akhtar,   Muhammad Ramzan.
This book analyzes commodity aspects of the effects of trade liberalization on agriculture in Pakistan. The study describes the effects of trade liberalization on selected commodities namely wheat, rice and maize at the national level and farm level. The analysis included ex-ante and ex-post welfare gain and loss at the national level and profitability at the farm level.
Tipo: Working or Discussion Paper
Palavras-chave: Trade liberalization; Trade policies; Agricultural products; International Relations/Trade.
Ano: 1999
URL: http://purl.umn.edu/32697

Effects of Trade Liberalization on Agriculture in Thailand: Commodity Aspects
Provedor de dados: 31
Autores: Itharattana,   Kajonwan.
This book analyzes commodity aspects of the effects of trade liberalization on agriculture in Thailand. The study describes the effects of trade liberalization on selected commodities namely rice, maize, soybean, milk and milk products, at the national level and the farm level. The analysis includes ex-ante and ex-post welfare gain and loss at the national level and profitability at the farm level.
Tipo: Report
Palavras-chave: Trade liberalization; Agricultural products; Production; Marketing; Demand; International Relations/Trade.
Ano: 1999
URL: http://purl.umn.edu/32686

Effects of Trade Liberalization on Agriculture in Thailand: Institutional and Structural Aspects
Provedor de dados: 31
Autores: Itharattana,   Kajonwan.
This book analyzes institutional and structural aspects of the effects of trade liberalization on agriculture in Thailand. The study stresses the analysis of trade-related policies, physical infrastructure, institutions in the public sector and various economic indicators. It discusses such commodities as rice, maize, rubber, cassava, shrimp, chicken, soybean products, dairy products and fertilizers. This book gives readers a general view of trade liberalization in Thailand.
Tipo: Report
Palavras-chave: Trade; Trade policies; Trade liberalization; Infrastructure; International Relations/Trade.
Ano: 1999
URL: http://purl.umn.edu/32710

Effects of Trade Liberalization on Agriculture in the Philippines: Institutional and Structural Aspects
Provedor de dados: 31
Autores: Mangabat,   Minda C.
This book analyzes institutional and structural aspects of the effects of trade liberalization on agriculture in the Philippines. The study stresses the analysis of trade-related policies, physical infrastructure, institutional-support services and performance in international trade. It discusses such commodities as rice, maize, soybean, cassava, potato, coconut, and livestock products. This book gives readers a general view of trade liberalization in the Philippines.Key Words: trade policies, trade, trade liberalization, agricultural products
Tipo: Report
Palavras-chave: Trade policies; Trade; Trade liberalization; Agricultural products; International Relations/Trade.
Ano: 1998
URL: http://purl.umn.edu/32680

Effects of using different host plants on the detected biodiversity of arbuscular mycorrhizal fungi from an agroecosystem
Provedor de dados: 88
Autores: CARRENHO,ROSILAINE; TRUFEM,SANDRA F.B.; BONONI,VERA L.R.
The influence of peanut (Arachis hypogaea L.), sorghum (Sorghum bicolor (L.) Moench) and maize (Zea mays L.) on the development and diversity of arbuscular mycorrhizal fungi (AMF) from an agrosystem was investigated. Soil collected from an agricultural field where maize had been grown was inserted into sowing holes, under the seeds of peanut, sorghum and maize those were subsequently grown in sterilised quartz sand separately in plastic boxes for five months. After this period, collections of roots and rhizospheric soil were made to evaluate the percentages of root colonization (RC), number of spores (NS) and species of AMF. Peanut showed the highest average values for RC and NS: 24.5% and 547.8/100 g of soil, respectively. Maize had an average RC of 19.7%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Peanut; Sorghum; Maize; Diversity of species.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002000100012

Effects of vitamin pre-sowing treatment on sweet maize seedlings irrigated with saline water
Provedor de dados: 109
Autores: Pradi-Vendruscolo,Eduardo; Seleguini,Alexander.
Abstract Salinity stress represents an obstacle for the production of plants of commercial interest, including sweet maize. Among the techniques used to suppress the effects caused by excess salts in the soil is the exogenous application of vitamins. Thus, the objective of this study was to evaluate the effect of the pre-sowing treatment of sweet maize seeds in solutions of thiamine, niacin and these two vitamins combined on the development of the plants irrigated with saline water. The treatments were composed by the 24 h pre-sowing treatment with water, thiamine solution (thiamine 100 mg L-1), niacin solution (niacin 100 mg L-1) and a combined solution with these two vitamins (thiamine 50 mg L-1 + niacin 50 mg L-1) irrigated with saline water. A control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Defense mechanism; Vitamin B1; Vitamin B3; Zea mays L. saccharata Strut.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000100020

Effects of weed control through cowpea intercropping on mayze morphology and yield
Provedor de dados: 87
Autores: Gomes,J.K.O.; Silva,P.S.L.; Silva,K.M.B.; Rodrigues Filho,F.F.; Santos,V.G.
Intercropping combined with competitive maize cultivars can reduce the use of herbicides to control weeds. The objective of this work was to evaluate the effects of intercropping cowpea and maize, as well as hand-weeding on maize morphology and yield. The experimental design was in randomized complete blocks, with treatments arranged in split-plots and five replications. The plots consisted of four maize cultivars (BA 8512, BA 9012, EX 4001, EX 6004) and the split-plots consisted of the following treatments: no-weeding; twice hand-weeding (20 and 40 days after sowing); and intercropping with cowpea ('Sempre Verde' cultivar), both maize and cowpea sown at the same time. The variables evaluated were: maize fresh green ears and grain yield; characteristics of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Green ears; Grain yield; Competition; Vigna unguiculata (L) Walp.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582007000300001

Efficacy of five insecticides against Frankliniella  williamsi Hood. Nezara viridula F. and Heliothis armigera HBN.
Provedor de dados: 106
Autores: Sawarng Charoenying.
1 table
Palavras-chave: Corn; Maize; Insect pests; Insecticides; Frankliniella williamsi; Nezara viridula; Heliothis armigera; ข้าวโพด; สารเคมีฆ่าแมลง; เพลี้ยไฟ; มวนเขียว; หนอนเจาะฝัก.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4370

Efficacy of insecticides against the corn thrips, Frankliella williamsi Hood. on super sweet corn, KU 27-127
Provedor de dados: 106
Autores: Sawarng Charoenying; Isichaikul, S.; Amornsak, W.
Palavras-chave: Corn; Maize; Corn thrips; Frankliniella williamsi; Sweet corn; Insect pests; ข้าวโพดหวาน; สารกำจัดแมลงศัตรู; เพลี้ยไฟ.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4415

Efficacy of insecticides in controlling the corn borer, Ostrinia furnacalis (Guenee) and their effects on natural enemies
Provedor de dados: 106
Autores: Watchara Choonhawong; Auranuj Kongkanjana; Boonsom Meksongsee.
2 tables
Palavras-chave: Corn; Maize; Borers; Insecticides; Ostrinia furnacalis; Natural enemies; Sweet corn; Triflumuron; Carbofuran; Kumiphor; Teflubenzuron; Chlorfluazuron; Cypermethrin; Trichogramma; Hatchability; ข้าวโพด; หนอนเจาะลำต้น; สารฆ่าแมลง; แมลงศัตรูธรรมชาติ.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4573

Efficacy of medicinal herbs and botanical insecticides against the egg laying of the corn stalk borer, Ostrinia furnacalis Guen
Provedor de dados: 106
Autores: Somchai Isichaikul; Sawarng Charoenying; Weerawan Amornsak.
1 table
Palavras-chave: Corn; Maize; Sweet corn hybrid; Corn borers; Ostrinia furnacalis; Medicinal herbs; Botanical insecticides; ข้าวโพด; หนอนเจาะลำต้น; พืชสมุนไพร; สารกำจัดแมลงจากพืช.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4263

Efficacy of microencapsulated nucleopolyhedroviruses from Colombia as biological insecticides against Spodoptera frugiperda (Lepidoptera: Noctuidae)
Provedor de dados: 109
Autores: Barrera-Cubillos,Gloria Patricia; Gómez-Valderrama,Juliana Andrea; Rivero,Laura Fernanda Villamizar.
Abstract: Wettable powder formulations by microencapsulation of viral occlusion bodies (OBs) of both Spodoptera frugiperda multiple nucleopolyhedrovirus from Colombia (SfCOL) and a genotypic variant (SfCOL-A) were evaluated for controlling the fall armyworm S. frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) in maize crops. Microencapsulation preserved OBs activity after three months of storage at 35ºC, where insecticidal activity loss was not greater than 12%. Additionally, the formulation protected the OBs against inactivation caused by UV-B radiation, retaining its insecticidal activity after 6 hours of UV laboratory exposure, in contrast to unformulated viral suspensions, which presented an Original Activity Remaining (OAR) between 12.1 and 50%. Under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microencapsulation; Baculovirus; Spodoptera frugiperda; Biological control; Maize.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000200267

Efficacy of modified atmosphere packaging to control Sitophilus spp. in organic maize grain
Provedor de dados: 52
Autores: Carli,Marcelo De; Bresolin,Bruna; Noreña,Caciano Pelayo Zapata; Lorini,Irineu; Brandelli,Adriano.
The effect of modified atmosphere packaging on the mortality of Sitophilus spp. in organic maize grain was studied. Maize grains were packed with five different atmospheres consisting of 20% O2, or 20, 40, 60, 80% CO2 with remaining N2. The packages were stored for 30 days at 26°C. CO2 and O2 concentrations were monitored inside the packages during the storage. The moisture content, titratable acidity and pH were analysed on the first and thirtieth day. At 5, 15 and 30 days of storage no significant differences were observed in the percentages of dead insects when CO2 was used. The results of progeny indicated that from the fifth day the number of emerging insects was low at 20, 60 and 80% CO2. Complete inhibition of the insects was achieved with 30 days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon dioxide; Modified atmosphere; Insect mortality.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600024

Efficacy of some insecticides in controlling ground weevil, Calomycterus sp. on corn
Provedor de dados: 106
Autores: Watchara Choonhawong; Oranutch Kongkanchana.
5 tables
Palavras-chave: Corn; Maize; Insecticides; Ground weevil; Calomycterus sp.; ข้าวโพด; มอดดิน; สารเคมีฆ่าแมลง.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4507

Efficacy of Trichogrammatidae Species (Hymenoptera) Submitted to the Herbicide Glyphosate
Provedor de dados: 87
Autores: LEITE,G.L.D.; PAULO,P.D.; TUFFI-SANTOS,L.D.; ALVARENGA,A.C.; SOARES,M.A.; DOURADO,L.R.; BISPO,E.P.R.
ABSTRACT: Information on selective herbicide, including glyphosate that does not affect non-target organisms such as natural enemies, are important in integrated pest management programs in maize. The dose 13.94 L ha-1 of glyphosate was evaluated in females on 10 Trichogrammatidae species. A female of each Trichogrammatidae species was individually positioned per test tube with a card containing approximately 45 Anagasta kuehniella Zeller, 1879 (Lepidoptera: Pyralidae) eggs. For 48 h parasitism was allowed, and later the cartons were sprayed with the herbicide or with distilled water, for the control treatment. The glyphosate showed variable effects for parasitoids. The emergence of T. acacioi females was lower but that of T. atopovilia, T. demoraesi, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biological control; Herbicide Roundup; Trichogramma; Zea mays; Parasitoid.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100153

Efficiency of maize cultivars for zinc uptake and use
Provedor de dados: 63
Autores: Furlani,Ângela Maria Cangiani; Furlani,Pedro Roberto; Meda,Anderson Rotter; Duarte,Aildson Pereira.
Zinc deficiency usually occurs in maize grown in Brazilian acidic soils. The aim of this study was to evaluate commercial maize cultivars for their Zn uptake and utilization efficiency. A greenhouse experiment using nutrient solution with young plants was carried out at Campinas, State of São Paulo, Brazil, in 2002. Treatments consisted of: 0.0; 0.1; 0.2; 0.4 and 0.8 mg L-1 Zn in the main plots and 24 commercial maize cultivars in the subplots, in a randomized complete block design. Zn concentration in shoot dry matter (SDM) ranged from 28.4 to 41.6 mg kg-1 among cultivars, clearly indicating a dilution effect, since a negative relation between SDM and plant height was shown. Total Zn-shoot content was a good parameter to discriminate cultivars, once...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Zn-efficiency; Zn uptake; Zn-deficiency; Commercial cultivars.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000300010

Efficiency of the controlled mass selection method on the improvement of Guatemala corn
Provedor de dados: 106
Autores: Klom Sombatsiri; Chalaw Chawanapong; Ampol Senanarong; Jinda Jan-orn.
1 table
Palavras-chave: Corn; Maize; Mass selection; Corn improvement; Guatemala corn; Plant breeding; ข้าวโพด; การคัดเลือกแบบคัดรวม; การปรับปรุงพันธุ์; พันธุ์กัวเตมาลา.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3727

Efficiency use of fertilizer for maize
Provedor de dados: 106
Autores: Ring Meesawat; Pradit Boonampol; Mongkol Panichkul; Withaya Marsangsan; Santi Teeraporn; Thianchai Arayangkoon; Montol Savatanon; Ho, C.T.
3 tables
Palavras-chave: Corn; Maize; Fertilizers; Yields; Nutrient requirement; ข้าวโพด; การใส่ปุ๋ย; ผลผลิตของเมล็ด.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4143

Efficient use of fertilizer on fresh ear corn followed by cotton grown on Pak Chong soil
Provedor de dados: 106
Autores: Ring Meesawat; Pradit Boonampol; Withaya Marsangsan.
1 table
Palavras-chave: Corn; Maize; Cotton; Fertilizers; Fresh ear corn; Yields; Quality; Pak Chong soil; ข้าวโพด; ฝ้าย; ข้าวโพดฝักสด; ชุดดินปากช่อง.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4022

Eficiência comparativa de inseticidas no controle das pragas do arroz armazenado no Estado do Acre.
Provedor de dados: 14
Autores: FAZOLIN, M.
No Brasil, as perdas de grãos durante o armazenamento têm atingido níveis médios de 20%. No Acre, devido as precárias condições de armazenamento e os fatores climáticos favoráveis ao desenvolvimento das pragas, os níveis de perdas são superiores a 30%. Os insetos têm sido os agentes responsáveis por essas perdas, causando prejuízos quantitativos determinados pela perda de peso e prejuízos qualitativos causados pela depreciação do produto devido a presença de ovos, larvas, pupas, adultos e alterações na composição química do produto, além de facilitar o desenvolvimento de micro-organismos. Nas condições locais, 35% do arroz armazenado é atacado pelo gorgulho (Sitophilus zeamais) e 65% pela traça (Sitotroga cereealella). No controle dessas pragas alguns...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize weevil; Angoumois grain moth; Embrapa Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Oriza sativa; Plagas de plantas; Control químico; Malatión; Plaguicidas.; Arroz; Praga de planta; Gorgulho dos cereais; Sitophilus zeamais; Traça dos cereais; Sitotroga cerealella; Controle químico; Inseticida; Campo Experimental.; Rice; Plant pests; Chemical control; Pesticides; Malathion.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/492345

Eficiência do modelo ceres-maize na predição da produtividade de milho em áreas com presença de variabilidade espacial
Provedor de dados: 64
Autores: Hurtado,Sandro Manuel Carmelino; Paglis,Carlos Maurício; Von Pinho,Renzo Garcia.
Modelos são utilizados para a simulação do crescimento de plantas como ferramentas na otimização das práticas de manejo, bem como para estimar produtividades. Com este estudo objetivou-se testar a eficiência do modelo CERES-maize na estimação da produtividade de milho, em função da variabilidade espacial presente na área. Foram instaladas no Campus da UFLA parcelas experimentais em áreas variáveis segundo o teor de saturação por bases (V%), ao ter-se mostrado decisivo nas observações realizadas. Também foram obtidos dados de temperaturas máxima e mínima, precipitação e radiação solar; dados de solo nas camadas de 0-27, 27-45, 45-68 68-80 e 80-100 cm; dados de manejo da cultura do milho, e estimados os parâmetros genéticos do híbrido utilizado. Os...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Modelagem; DSSAT; Zea mays L.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542005000600008

Eficiencia nutricional do milho em resposta a fontes e modos de aplicacao de fosforo.
Provedor de dados: 14
Autores: RESENDE, A. V.; FURTINI NETO, A. E.; ARAUJO, I. B.; ALVES, V. M. C.; SANTOS, J. Z. L.; VILELA, L. S.
bitstream/CPAC-2009/24151/1/p2002_36.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Phosphate fertilizers; Maize.; Fertilidade do Solo; Fertilizante Fosfatado; Fósforo; Milho; Zea Mays.; Phosphorus; Soil fertility.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567458

Eignung verschiedener Stangen- und Feuerbohnensorten für  den Mais-Bohnen-Gemengeanbau und Optimierung der  Bestandeszusammensetzung
Provedor de dados: 21
Autores: Fischer, Jenny; Höppner, Frank; Böhm, Herwart.
Traditional intercropping systems with maize and climbing beans have the potential to improve the protein- and energy supply from locally grown roughage. As previous field  experiments at the Thünen Institute of Organic Farming have shown, the crude protein content of maize silage can be enhanced by intercropping with climbing Phaseolus  beans. Since 2014 further field experiments are conducted, that aim to optimize bean yield and fodder quality in intercropping with maize. Therefore four cultivars of  Phaseolus vulgaris (Pv) and two cultivars of P. coccineus (Pc) are evaluated for their intercropping potential. Furthermore, the influence of varied seed densities on bean  yield and crude nutrients are evaluated for two selected bean cultivars. The...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Root crops.
Ano: 2017
URL: http://orgprints.org/31839/1/Eignung%20verschiedener%20Stangen-%20und%20Feuerbohnensorten.pdf

Eignung verschiedener Zwischenfrüchte als Vorfrüchte für die Ertrags- und Qualitätsleistung von Mais und Kartoffeln
Provedor de dados: 21
Autores: Kolbe, Dr. Hartmut.
Zur Verbesserung des Nährstoffmanagements und zur Ausnutzung von Vorfruchteffekten wurden verschiedene Zwischenfrüchte zur Gründüngung unter den kontinentaleren Bedingungen des Öko-Feldes in Roda (Sachsen) geprüft. Ergebnisse von 2 dreijährigen Feldversuchen werden in diesem Poster vorgestellt.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Crop combinations and interactions; Root crops.
Ano: 2006
URL: http://orgprints.org/8878/1/20060524_Poster_FeldtagRoda_ZFruechte.pdf

Einfluss der Bewirtschaftungsform, der Vorfrucht und der Düngung auf den Befall von Winterweizenkörnern mit Pilzkrankheiten im DOK-Versuch
Provedor de dados: 21
Autores: Gunst, Lucie; Krebs, Heinz; Dubois, D.; Forrer, H.-R.
In the DOK long-term field trial in Switzerland comparing bio-dynamic, bio-organic, and conventional farming systems, the occurrence of Fusarium species and Microdochium nivale on grains of wheat was investigated from 1997 to 2003. Although no differences between the farming systems were found, the previous crop, the fertilisation level, and the year significantly influenced the disease incidence. In 2003, the effect of the pre-crops potatoes versus silage-maize on fusaria was compared. As expected, the incidence of fusaria was significantly higher after maize compared with potatoes. However, the main responsible species was not F. graminearum but F. poae. This species is known for the production of hazardous toxins. A greater input of fertiliser resulted...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Cereals; Pulses and oilseeds Composting and manuring.
Ano: 2005
URL: http://orgprints.org/3781/1/3781.pdf

Einfluss der Düngung mit Gärrückständen aus der Biogaserzeugung auf den Ertrag von Silomais und auf die bodenmikrobielle Aktivität
Provedor de dados: 21
Autores: Kautz, Timo; Rauber, Rolf.
Organic manuring with slurry from biogas plants may contribute to plant nutrition and maintenance of soil fertility in organic farming. However, the chemical properties of biogas slurry depend markedly on substrate input and process technology. The aim of this study was to gain more insights into the relationship between the quality of biogas slurry and its influences on plant and soil parameters when applied as organic ma-nure. We studied the effects of slurries from two different biogas plants on yield of maize and soil microbial activity in a two-year field experiment. The investigation took place on a loam-clay soil near Göttingen, Lower Saxony. Biogas slurry A was obtained from a biogas plant with liquid pig manure as main input, slurry B originated...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology; Composting and manuring.
Ano: 2007
URL: http://orgprints.org/9854/1/9854_Kautz_Vortrag.pdf

Einfluss der Fütterung auf die Milchfettzusammensetzung: Naturwiesenfutter  im Vergleich zu Kunstwiesenfutter
Provedor de dados: 21
Autores: Wyss, Ueli; Collomb, Marius.
A trial was carried out to investigate the influence of forage from temporary or from  permanent grassland as well as permanent grassland supplemented with maize silage  on the milk fat composition. The trial lasted seven weeks: two weeks of adaptation  period and five weeks of experimental period. The forage was offered ad libitum in the  stable. None of the cows received concentrates, only a mineral supplement was added.  Both feed intake as well as milk production were recorded daily. Before the trial  and three times during the trial milk samples were taken and in addition to the fat,  protein and lactose content different fatty acids in the milk fat were analysed.  The variant with the forage from the permanent grassland had, in comparison with the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Feeding and growth.
Ano: 2009
URL: http://orgprints.org/14054/1/Wyss_14054.pdf

Einfluss des Anbausystems auf Ertrag und Gesundheit von  Winterweizen
Provedor de dados: 21
Autores: Krebs, H.; Zanetti, S.; Jenny, E.; Forrer, H.-R.; Zihlmann, U.; Tschachtli, R.
In a long-term trial in central Switzerland, yield and health of winter wheat was  examined under organic, extensive and intensive management.  In the organic cropping system, soil was ploughed and fertilised with cattle dung. In  the extensive system, soil was cultivated ploughless and dung was supplemented by  mineral fertiliser. Herbicides were used, but no growth regulators or fungicides. In the  intensive system, soil was ploughed and manure was based on cattle dung and  mineral fertiliser with 20 % more nitrogen than in the extensive system. For plant  protection, herbicides, growth regulators and fungicides were used.  In the period from 2004 to 2007, average winter wheat yields of the intensive and the  extensive crop management system exceeded...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions.
Ano: 2009
URL: http://orgprints.org/9544/1/Krebs_9544.pdf

Einfluss des Kraftfutterniveaus in der ökologischen Milchviehhaltung
Provedor de dados: 21
Autores: Schiborra, Frau Anne; Spiekers, Herr Hubert; Verhoeven, Frau Anne; Pries, Herr Martin; Kempkens, Herr Karl.
A feeding trail was carried out in the Organic Dairy Farm of “Haus Riswick“, Kleve, Germany between 1st August 2002 and 31st October 2003 in order to a) investigate the frequently asked question after the “optimal” concentrate-level in Organic Farming and b) relate the concentrate amount to potential health problems of herds associated to the change into Organic Farming. The herd was split into 2 groups of 18 cows. A high quality forage ration was fed to both groups which allowed maintenance plus 19 kg of ECM production on average, which was composed of grass and maize silage in winter, and additional pasture in summer time. The Control-Group (C) received concentrates according to their milk yield, but was not given more than 8 kg/d. The Experimental-Group...
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2004
URL: http://orgprints.org/3584/1/3584.pdf

Einfluss verschiedener Zwischenfrüchte als Vorfrüchte für die Ertrags- und Qualitätsleistung von Silomais und Kartoffeln
Provedor de dados: 21
Autores: Schliesser, Ingeborg; Schuster, Martina; Kolbe, Hartmut.
Mehrjährige Gefäß- und Feldversuche des Landesamtes für Umwelt, Landwirtschaft und Geologie in Sachsen zeigen, dass Zwischenfrüchte zu höheren Erträgen bei Silomais oder Kartoffeln führen können. Zudem konnte bei bestimmten Zwischenfrüchten eine deutliche Verringerung des Nitratgehalts im Boden nachgewiesen werden.  Insbesondere der Anbau von Weißem Senf, Sommerraps, Phacelia und Welschem Weidelgras verringerte den Nitratgehalt um bis zu 75 Prozent des Bodenausgangsgehaltes. Ähnliche Wirkung zeigten das Landsberger Gemenge und ein Gemenge aus Phacelia, Buchweizen und Platterbse. Damit können Zwischenfrüchte gut zur Verringerung des Nitrateintrags ins Grundwasser beitragen.    Bei reinen Leguminosen ist die Nitrataufnahme aus dem Boden aufgrund ihrer...
Tipo: Journal paper
Palavras-chave: Crop combinations and interactions; Composting and manuring; Nutrient turnover; Root crops.
Ano: 2010
URL: http://orgprints.org/19351/1/Z%2DFruechte_Oekolandbau10.pdf

Einflüsse des Klimawandels auf landwirtschaftliche Schädlinge  im Biologischen Landbau Ostösterreichs
Provedor de dados: 21
Autores: Frauenschuh, Mag Eva Maria; Kromp, Dr Bernhard.
From the year 2000 onwards, organic farmers in Eastern Austria have been  complaining about damages in arable crops by former inconspicuous or recently  immigrated insect pests. In our project, the recent obvious changes in occurrence of  arable pests were investigated with respect to climate change. The literature was  evaluated focussing on Austria and the adjacent Eastern Middle European countries.  Further on, conspicuously, weather-related pest outbreaks in Austria in the last years  were documented by interrogating plant protection experts. For a number of species  from cereals, root crops, oil-, protein- and fodder crops, in recent years an increasing  pest pressure was stated, caused rather by changes in cultivation systems (crop  rotation, reduced...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection.
Ano: 2009
URL: http://orgprints.org/14432/1/Frauenschuh_14432.pdf

Einsatz konventionell erzeugter Kosubstrate zur Biogasgewinnung im Öko-Landbau
Provedor de dados: 21
Autores: Siegmeier, Torsten; Möller, Detlev; Anspach, Victor.
This article determines type and amount of non-organic substrates used for biogas production on organic farms in Germany. Furthermore, it discusses determinants and problems of non-organic substrate use. Conventional substrate – mainly maize – is extensively used in larger biogas plants on farms without sufficient land area and/or low stocking rates per kWel. These overcapacities of organic biogas plants may represent maladjustment to external preconditions as a result of bad planning as well as carefully considered exploitations of business opportunities on the basis of external inputs. In order to reduce non-organic substrate use due to bad planning, on one hand biogas consulting services which account for the particular conditions of organic agriculture...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Farming Systems.
Ano: 2011
URL: http://orgprints.org/17448/3/Siegmeier_17448.pdf

Einsatz von Maisprodukten als Futtermittel in den Praxisbetrieben des Projekts „Gesundheit und Leistung in der ökologischen Milchviehhaltung“
Provedor de dados: 21
Autores: Rauch, Petra; Spiekers, Hubert.
Während des Projekts "Gesundheit und Leistungsfähigkeit von Milchkühen im Ökologischen Landbau interdisziplinär betrachtet" wurden Daten zum Grobfuttereinsatz und -management erfasst. Durch diese Daten ist es möglich, Rückschlüsse auf die Qualität und Menge des Maiseinsatzes auf den Projektbetriebe zu schließen. Ca. 50% der Betriebe setzen Maissilage in den Milchviehrationen ein. Die Qualität der Silagen sind vergleichbar mit konventionellen Proben. Werden die speziellen Bedingungen für den Anbau von Mais im ökologischen Anbau betrachtet, kann die Fütterung von Mais das Energieniveau von Rationen anheben.
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2011
URL: http://orgprints.org/17305/3/Rauch_17305.pdf

El mercado de semillas y las posibilidades competitivas para una pequeña empresa productora de semilla certificada de maíz.
Provedor de dados: 32
Autores: Luna Mena, Bethel Marina.
El maíz es el cultivo más importante en México, sin embargo, no se produce lo suficiente para satisfacer la demanda nacional. Las semillas de variedades mejoradas constituyen el puente de transferencia de tecnología entre el mejoramiento genético y el productor, para alcanzar niveles competitivos en la producción. Sin embargo, en México su uso se estima en sólo 30 % de la superficie agrícola. La industria de semillas, se encuentra concentrada en pocas empresas transnacionales, que atienden a la agricultura comercial, dejando a segmentos de mercado que no son de su interés. Así, se percibe que se puede promover la participación de pequeñas empresas productoras de semilla a nivel local y regional, que atiendan a productores de pequeña escala en regiones...
Palavras-chave: Mercado de semillas; Competitividad; Producción de semilla certificada de maíz; Pequeñas empresas productoras de semilla; Seed marke; Competitiveness; Certified maize seed production; Small seed companies; Maestría; Producción de semillas.
Ano: 2011
URL: http://hdl.handle.net/10521/605

El sistema de producción y clasificación fenotípica de las cabras de la mixteca poblana.
Provedor de dados: 32
Autores: Abrego Hernández, Rafael.
El objetivo del trabajo fue analizar el sistema de producción y las poblaciones de cabras criollas para definir el morfotipo existente de la Mixteca Poblana. El trabajo se realizó en los municipios de Tecomatlán, Tehuitzingo, Piaxtla, Chinantla, Tulcingo de Valle y Acatlán de Osorio, Puebla. Para la caracterización del sistema de producción caprino se aplicó una encuesta a 100 productores para registrar información del perfil del productor, rebaño, infraestructura, alimentación, mejora genética, sanidad y comercialización. A una población de 1290 cabras, se les registró información faneróptica y zoométrica. La información se analizó para obtener estadísticos descriptivos, discriminantes canónicos y componentes principales. La edad de los productores fue de...
Palavras-chave: Cabra colorada; Manejo de cabras; Medidas zoométricas; Perfil del productor; Peso vivo; Body traits; Goat farmer's profile; Live weight; Management practices; Reddish goats; Desarrollo y Gestión de Sistemas Ganaderos; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/2204

Elaboracao de farinha de milho instantanea por extrusao termoplastica.
Provedor de dados: 14
Autores: ASCHERI, R. L. R.; CARVALHO, C. W. P.
bitstream/item/156848/1/cp210001.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Farinha de milho instantanea; Extrusao termoplastica; Instant maize flour; Thermoplastic extrusion.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/410306

ELABORACIÓN DE MEZCLAS DE FERTILIZANTES PARA PAPA Y MAÍZ EN ELVALLE DE TOLUCA, ESTADO DE MÉXICO
Provedor de dados: 31
Autores: Millan,   Jose Nefthalli Martinez; Rebollar Rebollar,   Samuel; Salazar,   Jose Alberto Garcia; Jimenez,   Daniel Cardoso; Hernandez Martinez,   Juvencio; Rojo Rubio,   Rolando; Portillo,   Benito Albarran; Gonzalez Razo,   Felipe de Jesus; Ramirez Abarca,   Orsohe.
Project evaluation allows to resources optimisation, improving business's productivity and viable investments. The aim of this research was to provide technical and economic elements, to support decisions about the feasibility or not to run an agribusiness oriented to fertilizer's formulas production, used for potato and maize crops during establishment and maintenance in Toluca Valley, Estate of Mexico. The methodology used was project formulation and evaluation. The main markets were Toluca, Zinacantepec, Sultepec, Valle de Bravo and Temascaltepec municipalities. The discount rate was 13.1 %, with an estimated Net Current Value of $ 2 981 061, the Internal Return Rate (IRR) was 78.36 %, and the Modified Internal Return Rate (MIRR) was 181.44 %. The...
Tipo: Journal Article
Palavras-chave: Fertilizer's formulas production; Net current value; Internal return rate; Modified internal return rate; Agro mezclas; Valor presente neto; Tasa interna de retorno; Tasa interna de retorno modificada.; Agribusiness; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/45846

Elección de un portafolio de inversión agrícola bajo la metodología de media-varianza y media-semivarianza.
Provedor de dados: 32
Autores: León Herrera, Albert.
El objetivo de esta investigación fue comparar el método propuesto por Harry Markowitz (media y varianza) y el método propuesto por Javier Estrada (media-semivarianza), en la elección de un portafolio de inversión, conformado por una mezcla diversificada de cultivos agrícolas. Los datos trabajados fueron rentabilidades de cinco productos agrícolas, mismos que fueron deflactados y de ellos se obtuvieron las ganancias del periodo 1979-2009. Ganancias que nos permitieron calcular la matriz de covarianzas de los productos agrícolas por ambos métodos. Posteriormente se realizo una simulación de 100 repeticiones de tamaño n=30, para obtener las rendimientos de cada producto mediante ambos métodos de solución, para presentar un histograma de frecuencias de cada...
Palavras-chave: Portafolio de inversión; Diversificación; Rentabilidad; Ganancia; Portfolio investment; Diversification; Profitability; Profit; Desarrollo rural; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/664

Electrical properties of maize kernels contaminated with aflatoxin
Provedor de dados: 111
Autores: Muga, Francis Collins; Workneh, Tilahun Seyoum; Marenya, Moses.
The purpose of this study was to investigate the effect of aflatoxin contamination on the dielectric constant of maize kernels. A factorial experiment comprising of three levels of moisture content (13.3, 15.3, and 16.4%), three frequencies (25, 50, and 100 kHz), and nine levels of aflatoxin contamination (0, 1.5, 2.6, 10, 50, 100, 150, 172, and 230 μg/kg) was used. The maize kernels were poured into a custom-built sample holder comprising a shielded parallel plate capacitor. An ISO-TECH LCR-821 meter was used to measure the capacitance, from which the dielectric constant was computed. The results indicated that moisture content and frequency significantly (p ≤ 0.05) affected the dielectric constant. The dielectric constant increased with increase in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food Engineering; Postharvest technology Aflatoxin; Capacitance; Dielectric constant; Maize kernels.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4582

Elementary study for corn flour production from Opaque-2
Provedor de dados: 106
Autores: Udom Kanchanapakornchai; Somchai Prabhavat.
1 ill., 1 table
Palavras-chave: Corn; Maize; Opaque-2; Corn flour; Production; Processing; ข้าวโพด; โอเพค 2; แป้งข้าวโพด.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3882

Elimination of the Effect of Some Herbicides on the Growth of Zea mays and Accumulation in the Soil Using Urea
Provedor de dados: 87
Autores: ELHAKEM,A.H.; ABD EL-SALAM,M.M.
ABSTRACT: This study evaluates the effect of urea on growth of herbicide-treated maize and its accumulation in the soil. When the seedlings were 15 days old, the plots were divided into five groups. One group served as control, two received treatments with metolachlor and isoproturon at the dose of 1.5 kg ha-1 and 2.5 L ha-1, respectively. The two remaining groups received the same dose of herbicide along with urea added at a rate of 129 kg ha-1. The application of the two herbicides appeared to cause a significant decrease in shoot dry weight, photosynthetic pigments, d-aminolevulinate dehydratase enzyme [ALA-D, EC 4.2.1.24] and total soluble carbohydrates of the maize plants. The application of urea appeared to alleviate the effects of both herbicides on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Soil accumulation; Nitrogen fertilizer.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100308

Emergence of Silage Maize as Affected by Conservational Tillage, Ridge and Direct Planting Systems
Provedor de dados: 111
Autores: Ebubekír Altuntaş; Associate Professor; Serkan Dede; Ministry of Agriculture.
In this study, the effects of tillage and planting systems on physical properties of soil and plant characteristics of second crop silage maize (seedling emergence) grown in a Transition Climate Belt of Turkey were investigated. Experiment was conducted on a sandy clay loam soil at Erbaa Karayaka Plain. The tillage systems evaluated were conventional with a mouldboard plough+cultivator+toothed harrow and conservational with chisel and toothed harrow. The three planting systems studied were flat with no-ridging, ridge planting, and direct planting system with no tilling. Soil moisture content, bulk density, penetration resistance, maize mean emergence dates, emerged rate index and percentage of emerged seedlings were measured to assess the effect of...
Ano: 2009
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1363

Emerging Structural Maize Deficits in Eastern and Southern Africa: Implications for National Agricultural Strategies
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Chapoto,   Antony.
This note summarizes analysis of trends in net maize exports over the 1960-2005 period  and examines whether these trends are being reflected in changing maize price levels in the  region. The implications are highlighted of the findings for countries’ agricultural development  strategies.
Tipo: Report
Palavras-chave: Food security; Food policy; Zambia maize; Crop Production/Industries; Q18.
Ano: 2006
URL: http://purl.umn.edu/54620

Emergy evaluation of tillage systems in maize production in the agreste of sergipe state.
Provedor de dados: 14
Autores: BARROS, I. de; PACHECO, E. P.; CARVALHO, H. W. L. de.
bitstream/item/142336/1/BP-95.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Semeadura direta; Preparo convencional; Preservação ambiental; Indicadores ambientais.; Cultivo Mínimo.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1039848

Emission of nitrous oxide and carbon dioxide from semi-arid tropical soils in Chiapas México
Provedor de dados: 90
Autores: Ponce-Mendoza,Alejandro; Ceballos-Ramírez,Juan Manuel; Gutierrez-Micelli,Federico; Dendooven,Luc.
The semi-arid region of Chiapas is dominated by N2 -fixing shrubs, e.g., Acacia angustissima. Urea-fertilized soil samples under maize were collected from areas covered and uncovered by A. angustissima in different seasons and N2O and CO2 emissions were monitored. The objective of this study was to determine the effects of urea and of the rainy and dry season on gas emissions from semi-arid soil under laboratory conditions. Urea and soil use had no effect on CO2 production. Nitrons oxide emission from soil was three times higher in the dry than in the rainy season, while urea fertilization doubled emissions. Emissions were twice as high from soil sampled under A. angustissima canopy than from arable land, but 1.2 lower than from soil sampled outside the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acacia angustissima; Denitrification; Nitrification; Soil water content; Urea.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000500015

Emission und Aufnahme von Lachgas und Methan durch Ackerböden in der Fruchtfolgesequenz Kunstwiese – Silomais unter konventioneller und biologischer Bewirtschaftung
Provedor de dados: 21
Autores: Skinner, Colin; Krauss, Maike; Conen, Franz; Hansen, Sissel; Mayer, Jochen; Neftel, Albrecht; Mäder, Paul; Gattinger, Andreas.
Organic farming systems provide multiple environmental benefits. Concerning climate change they have a substantial mitigation potential. Skinner et al. (2014) evaluated with Meta-Analysis the global dataset on comparative field measurements of soil greenhouse gas (GHG) fluxes under organic and non-organic agricultural management that have been published by the end of 2012. They showed that for arable land-use under organic management compared to non-organic 1) the cumulated area-scaled N2O emissions are about 15 % lower, 2) yield-scaled N2O emissions are slightly higher and 3) CH4 uptake is higher. However, this database is thin and further field measurements covering whole crop rotations are needed to close knowledge gaps. Therefore soil GHG fluxes are...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil.
Ano: 2015
URL: http://orgprints.org/26920/2/26920_skinner.pdf

Enabling Small-Scale Maize Marketing and Processing to Assure Supplies of Low-Cost Staples
Provedor de dados: 31
Autores: Mwiinga,   Billy; Nijhoff,   Jan J.; Tschirley,   David L.; Weber,   Michael T.; Jayne,   Thomas S.; Arlindo,   Pedro; Tembo,   Gelson; Shaffer,   James D.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Downloads December 2008 - July 2009: 6.
Ano: 2003
URL: http://purl.umn.edu/11296

Encapsulation of Lactobacillus acidophilus and different prebiotic agents by external ionic gelation followed by freeze-drying
Provedor de dados: 65
Autores: Poletto,Gabriela; Fonseca,Bruna de Souza; Raddatz,Greice Carine; Wagner,Roger; Lopes,Eduardo Jacob; Barin,Juliano Smanioto; Flores,Erico Marlon de Moraes; Menezes,Cristiano Ragagnin de.
ABSTRACT:  The aim of this study was to investigate the influence of the addition of prebiotics rice bran, inulin and hi-maize, on the survival of Lactobacillus acidophilus in alginate microparticles obtained by external ionic gelation followed by freeze-drying. The microparticles size ranged from 127.5μm to 234.6μm. Microparticles added from the different prebiotics demonstrated an increase in the protection of the microorganism, which presented greater viability against the gastrointestinal simulation. As for storage under different conditions, rice bran treatment at 25ºC kept probiotics viable for 30 days. Under storage conditions -18°C and 7°C, treatments containing prebiotics hi-maize and rice bran maintained viable probiotic microorganisms for a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microencapsulation; Probiotics; Rice bran; Inulin; Hi-maize.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000200751

Endomycorrhizal effects on phosphorus uptake and yield increasing in corn
Provedor de dados: 106
Autores: Omsub Nopamornbodi; Yenchai Vasuvat.
4 tables
Palavras-chave: Corn; Maize; Endomycorrhiza; Phosphate fertilizers; Phosphorus uptake; Growth; ข้าวโพด; เอนโดไมคอร์ไรซา; การเจริญเติบโต; การดูดใช้ฟอสฟอรัส.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4020

Endosperm genotyping as a strategy to differentiate the allele source in maize heterozygous progeny
Provedor de dados: 86
Autores: Martins,Francielle Alline; Carneiro,Pedro Crescêncio Souza; Cruz,Cosme Damião; Carneiro,José Eustáquio de Souza; Guimarães,Claudia Teixeira.
The objective of this work was to distinguish the parental source of alleles in heterozygous progeny using semiquantitative polymerase chain reaction (PCR) in maize endosperm. Endosperms derived from direct and reciprocal single-cross hybrids between maize inbred lines L3 and L1113-01 were genotyped by semiquantitative PCR methodology (SQ-PCR) using fluorescent microsatellite primers. The amplification products were evaluated by the ratios of fluorescence intensity (RFI), calculated between the peaks corresponding to the alleles derived from each parental line. Based on the statistically significant contrast between RFI mean values of direct and reciprocal single-cross hybrids, it was possible to distinguish the number of alleles received from each...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Allelic origin; Heterozygote; Natural populations; Polygenes; Semiquantitative PCR.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001000012

Energetic and nutrient metabolizability values of corn obtained with nutritional corrections for broilers
Provedor de dados: 96
Autores: Makiyama,Letícia; Alvarenga,Renata Ribeiro; Rodrigues,Paulo Borges; Zangeronimo,Márcio Gilberto; Oliveira,Evelyn Cristina de; Bernardino,Verônica Maria Pereira; Garcia Júnior,Antônio Amandio Pinto; Bertechini,Antônio Gilberto.
The experiment was carried out to evaluate the influence of nutritional correction on the partial diet replacement or pure-food methodology to determine the energy values (apparent metabolizable energy - AME and nitrogen-correct apparent metabolizable energy - AMEn) and coefficient of metabolizability of nutrients of maize. The method of total excreta collection was used, with 120 female Cobb 500® broilers weighing 1,339±3 g and at 28 days of age distributed in a completely randomized design with five replicates and four birds per experimental unit. The treatments were pure maize with three levels of nutritional correction (0, 50 and 100%) and a maize-replaced basal diet (400 g/kg) with two levels of correction (0 and 100%). The corrections were made in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metabolism; Metabolizable energy; Replacement methodology; Total collection.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500031

Energiepflanzenanbau für die Biogaserzeugung im  Ökologischen Landbau
Provedor de dados: 21
Autores: Graß, R.; Stülpnagel, R.; Kuschnereit, S.; Wachendorf, M.
The interest in the cultivation of energy plants for the biogas production is increasing  in organic agriculture. But this cropping has to be designed according to the principles  of organic farming and sustainable agriculture. Therefore in the research project  ÖKOVERS different energy crops as a part of a standard crop rotation are compared  in two different cropping systems. Cropping system 1 is a double cropping system with  a mixture of grass/clover harvested in spring as first crop and a following second crop  like sunflowers, maize, sorghum, amaranth, buckwheat and others. The second  system is a mixture of grass/clover with several cuts during one year. The highest  yield was obtained with the mixture of grass/clover in the second system with 18,5...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions.
Ano: 2009
URL: http://orgprints.org/13785/1/Grass_13785.pdf

Energiepflanzenanbau zur Biogaserzeugung im Ökologischen Landbau – Ergebnisse aus dem Versuch ÖKOVERS
Provedor de dados: 21
Autores: Klingebiel, Lars; Stülpnagel, R.; Graß, Rüdiger; Wachendorf, Michael.
In the research project ÖKOVERS different crops for fermentation were cultivated in a double cropping system at five locations in Germany. The crop yields after half a year and after one and half a year mixture of clover/grass were compared. The second crops were maize, sorghum, sunflowers, buckwheat and others, which have been fertilised with solid and liquid digestate. In one and half a year a yield over 20 t DM  ha-1 of clover/grass was realised. The yields of the second crops after a one and half a year clover/grass were clearly higher than after half a year clover/grass. The highest yield of the second crops in the mean of all locations was realised by maize with 11,5 t DM ha-1. The yield of sorghum and sunflowers and a mixture with maize and...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general.
Ano: 2011
URL: http://orgprints.org/17569/3/Klingebiel_17569.pdf

Energiepflanzenproduktion in biologischen Marktfruchtbetrieben
Provedor de dados: 21
Autores: Walla, DI Christoph; Schneeberger, Prof.Dr.DI Walter.
On organic crop farms mobile nitrogen sources are scarce. One possible source can be degassed biomass from fermented energy crops produced on organic farms. This study analyses the effects of an investment in a cooperative biogas plant on the production program and the net farm income using a linear planning model. The production of green electricity from biogas yields in a higher net farm income. Alfalfa grass is a more efficient energy crop than maize in organic farms. Fewer legumes and more cash crops are produced. The yearly labour requirement rises due to the production of energy crops, operation of the biogas plant and spreading the degassed biomass.
Tipo: Conference paper, poster, etc.
Palavras-chave: Farm economics.
Ano: 2005
URL: http://orgprints.org/3538/1/3538.pdf

Energy and emergy evaluation of potentials for energy self-sufficiency in Danish organic dairy farms by production of biogas and bioethanol
Provedor de dados: 21
Autores: Markussen, Mads Ville; Østergård, Hanne; Oleskowicz-Popiel, Piotr; Schmidt, Jens Ejby; Pugesgaard, Siri.
One obvious way to enhance agricultural resilience is for farms to increase self-sufficiency with necessities such as fuel, fodder and fertilizer. Our research seeks to uncover these potentials for Danish organic dairy farming.  The setting is a theoretical model of a farm-cooperation of 10 farms of 100 ha each producing only milk and animals for slaughtering and being self-sufficient with fodder and fertilizer. The question is if they can be self-sufficient with energy by means of shared biogas and/ or bioethanol production facilities. The method is mapping of energy, emergy (embodied energy measured in solar energy joules) and mass flows in different scenarios, that are based on empirical data from Danish dairy farms concerning mix of crops, crop yields,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems Recycling; Balancing and resource management Technology assessment.
Ano: 2009
URL: http://orgprints.org/15842/1/15842_Abstract.pdf

Energy and Water Use Related to the Cultivation of Energy Crops: a Case Study in the Tuscany Region
Provedor de dados: 7
Autores: Dalla Marta, Anna; DIPSA-University of Firenze; anna.dallamarta@unifi.it; Natali, Francesca; DIPSA-University of Firenze;; Mancini, Marco; DIPSA-University of Firenze;; Ferrise, Roberto; DIPSA-University of Firenze;; Bindi, Marco; DIPSA-University of Firenze;; Orlandini, Simone; DIPSA-University of Firenze;.
The contribution of agrobiomasses, as a source of energy, to the reduction of greenhouse gas emissions was confirmed by several studies. Biomass from agriculture represents one of the larger and more diverse sources to exploit and in particular  ethanol and diesel have the potential to be a sustainable replacement for fossil fuels, mainly for transport purposes. However, the cultivation of energy crops dedicated to the production of biofuels presents some potential problems, e.g., competitiveness with food crops, water needs, use of fertilizers, etc., and the economic, energy, and environmental convenience of such activity depends on accurate evaluations about the global efficiency of the production system. In this study, the processes related to the...
Tipo: Peer-Reviewed Insight
Palavras-chave: Agroenergy; Bioethanol; Energy balance; Pure vegetable oil; Water balance.
Ano: 2011

Energy balance methodology and modeling of supplementary forage production for cattle in Brazil
Provedor de dados: 63
Autores: Romanelli,Thiago Libório; Milan,Marcos.
Cattle is the main protein source in Brazil and cattle production depends on preserving forage in order to decrease the influence of dry periods on grass production. To minimize such problems, some new techniques have been created to increase the yield which also leads to energy demand increase. Energy balance is a vital tool to evaluate the efficiency of energy consumption in production systems. There is no standard methodology established for this determination. It is also difficult to analyze different management options because of the complexity of the production systems and the interactions among variables. Therefore the purpose of this study is to develop a methodology that supports the development of a model, using a spreadsheet, and to use it to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental management; Production systems; Sustainability; Silage; Haylage.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000100001

Energy balance of irrigated maize silage
Provedor de dados: 65
Autores: Ferreira,Tomás de Aquino; Ferreira,Sílvia Costa; Barbosa,Jackson Antônio; Volpato,Carlos Eduardo Silva; Ferreira,Rute Costa; Silva,Marielle Jordane da; Barbosa,Leonardo Maia.
ABSTRACT: The aim of the present study is to evaluate the energy balance and energy efficiency of the silage maize crop in the Center for Research, Development and Technology Transfer of the Universidade Federal de Lavras (CDTT-UFLA). The crop was irrigated by center pivot and the stages of maize cultivation and energy inputs were monitored for the 1st and 2nd crops of the 2014/2015 harvest. Results from the energy analysis showed the crop had a total energy input of 45,643.85 MJ ha-1 and 47,303.60 MJ ha-1 for the 1st and 2nd crops and a significant predominance of direct energy type (about 92% of the matrix). Regarding direct energy inputs, the diesel oil was the most representative, contributing with approximately 38% of the total energy demand....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy efficiency; Energy in agriculture; Center pivot; Sustainability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000500351

Energy Demand in Agricultural Biomass Production in Parana state, Brazil
Provedor de dados: 111
Autores: Andrea, M. C. S.; Tieppo, R. C.; Gimenez, L. M.; Povh, F. P.; Katsman, T. J.; Romanelli, T. L.
Energy flow analysis is an interesting approach to assess and to improve sustainability of agricultural production systems, represented by the economy of energy resources and other inputs translated into energy terms. This type of analysis can complement the economic view contributing to more efficient production systems. Moreover, assessing crops with traditional food use may play an important role in energy provision. Energy efficiency tools were applied in order to determine the energy demand as well as the efficiency of the biomass production of several forage crops in mechanized systems conducted at Paraná state, Brazil. Material flow, input and output energy, energy balance, energy return over investment and embodied energy were used and identified...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergy; Energy indicators; Sustainability; Embodied energy.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2916

Energy demand in soybean seeding on maize straw intercropped with forage
Provedor de dados: 91
Autores: Chioderoli,Carlos A.; Silva,Vicente F. A.; Furlani,Carlos E. A.; Bertonha,Rafael S.; Cavichioli,Fabio A.
The sustainability of no-tillage system is fully linked to the soil use and management, in order to use technologies that promote the accumulation of dry vegetation in the soil, but it may affect the performance of agricultural machinery. Therefore, the objective of this study was to evaluate in soybean seeding the operational performance of tractor-seeder on maize straws intercropped with Urochloas in different treatments. The study was conducted in a randomized block design in factorial scheme 2 x 4 + 1, with four replications, formed by two intercropped forage species and five cropping systems. The dry maize straw, Urochloas dry mass and total straw dry mass were determined in treatments to verify the operational performance of the machines. The results...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No tillage system; Slippage of wheels; Crop-livestock integration.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014000800015

Energy input–output analysis and mechanization status for cultivation of rice and maize crops in Sikkim
Provedor de dados: 111
Autores: Yadav, S. N.; Chandra, R.; Khura, T. K.; Chauhan, N. S.
Rice and maize are main cereal crops cultivated in Sikkim.  In this paper energy input–output and the level of agricultural mechanization for cultivation of rice and maize in Sikkim state of India has been presented.  The data were collected on area under rice and maize crops, sources of power and agricultural tools/implements used total production through village survey.  It has been observed that the traditional practices of cultivation of rice and maize crops consumed an average energy input of 3338.984 MJ ha-1 and 4386.435 MJ ha-1 respectively.  Data analysis showed that about 60% of the total input energy in the present cultivation practices comes from human and animal power sources.  The output–to–input energy ratio was observed to be 7.66 and 5.86...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy in Agriculture Agricultural mechanization in Sikkim; Energy input and output; Rice and maize crops; Grain productivity.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2394

Energy potential of residual maize biomass at different spacings and nitrogen doses
Provedor de dados: 64
Autores: Ambrosio,Rodrigo; Pauletti,Volnei; Barth,Gabriel; Povh,Fabrício Pinheiro; Silva,Dimas Agostinho da; Blum,Hilbert.
ABSTRACT Agricultural residual biomass is an important source of energy, and its production and quality vary according to the crop management. This study aimed to assess the effects of plant distribution and nitrogen fertilization on the energy production potential of the biomass of maize cultivated under no tillage. The field experiment was installed in southeast Brazil using five nitrogen rates (0, 60, 120, 180, and 240 kg ha-1) and two inter-row spacings (0.4 and 0.8 m). Grain yield, residual biomass productivity, and bioenergy potential in different parts of the plant (grain, stalk+leaf, husk, and cob) were assessed. No change in grain yield was observed using narrow row spacing. Stalk+leaf and husk productivity was higher using 0.8 m than using 0.4 m...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Renewable energy; Zea Mays (L.); Calorific value; Electricity; Macronutrients.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600626

Energy supplementation in goats under a silvopastoral system of tropical grasses and leucaena
Provedor de dados: 124
Autores: Carvalho,Wanderson Fiares de; Oliveira,Maria Elizabete de; Alves,Arnaud Azevêdo; Moura,Raniel Lustosa de; Moura,Rosianne Mendes de Andrade da Silva.
ABSTRACT The effect was evaluated of energy supplementation with ground maize grain on the performance and behaviour of Anglo-Nubian goats under a silvopastoral system of leucena and tropical grasses. The experiment was carried out in an area of Leucaena (Leucaena leucocephala (Lam.) De Wit.) intercropped with a herbaceous layer having a predominance of tropical grasses (Tifton 85, Andropogon and Guinea). A completely randomised design with four treatments and five replications was adopted. Growing goats were used; the control group being fed only on pasture, and the other groups supplemented with ground maize at 0.5, 0.9 and 1.3% of live weight. Supplementation reduced grazing time and increased rumination and idle time; although the goats spent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing behaviour; Weight gain; Leucaena leucocephala; Maize.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100199

Enhancing Sustainable Development of Diverse Agriculture in India
Provedor de dados: 31
Autores: Singh,   R.P.; Singh,   N.P.; Kumar,   Ranjit.
Agriculture in India occupies an important place as it contributes nearly 25 per cent of GDP and two-thirds of the population depend upon it. Agricultural growth in the past has been sufficient to move from severe food crisis to aggregate food surplus today. The rainfed regions are diverse in terms of resource base, varying from resource rich regions harnessing substantial production to resource poor regions with restricted potential. These resource poor regions are mostly dominated by secondary crops. Barring maize and potato, secondary crops are loosing ground against the finer cereals, cash and commercial crops. Therefore, there is an urgent need to provide a leverage to these crops by providing support in terms of technological advancement and policy...
Tipo: Report
Palavras-chave: Diversification; Food crops; Agriculture; Crop Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/32702

Enhancing sustainable development of diverse agriculture in Indonesia
Provedor de dados: 31
Autores: Siregar,   Masdjidin; Suryadi,   Muhammad.
This report is the outcome of the first phase of the AGRIDIV project (Identification of pulling factors for enhancing the sustainable development of diverse agriculture in selected Asian countries), which was carried out in 2003-2004. Based on the availability of secondary data, five major CGPRT crops grown in Indonesia are studied in detail to examine the sustainable development of diverse agriculture. The crops include maize, soybean, groundnut, cassava, potato and sweet potato. In addition, rice, as the major staple food in Indonesia, is included and rice-related policies affect resource allocation and therefore affect the development of CGPRT crops.
Tipo: Working or Discussion Paper
Palavras-chave: International Development.
Ano: 2006
URL: http://purl.umn.edu/7304

Enhancing Sustainable Development of Diverse Agriculture in Thailand
Provedor de dados: 31
Autores: Roonnaphai,   Nareenat.
The objective of Phase I Thailand country study are to review and analyses past trends in the production, marketing, consumption, processing and related policies of major CGPRT crops, of which maize, cassava and soybean are selected. In addition, analysis of trade liberalization, agro-industries using the three selected crops, production, marketing and processing potentials and threats are conducted in an attempt to seek policy recommendations for the development of sustainable, diversified agriculture for poverty alleviation.
Tipo: Report
Palavras-chave: Crop Production/Industries; Food Security and Poverty.
Ano: 2006
URL: http://purl.umn.edu/32705

Enriching Impact Assessment at CIMMYT
Provedor de dados: 31
Autores: La Rovere,   Roberto; Dixon,   John; Hellin,   Jonathan.
The International Center for Maize and Wheat Improvement (CIMMYT) is a CGIAR centre with a long tradition of impact assessment (IA). Until recently, such work had focused on the rates of adoption of improved germplasm and returns on investment. Limited attention was directed at measuring impacts in terms of livelihood security or poverty reduction. In 2005, therefore, CIMMYT's Impacts Targeting and Assessment Unit (ITAU) began to develop and promote more wide-ranging types of IA. In order to enhance its IA culture and institutionalize IA within the Center, ITAU organized a series of workshops that brought together different players amongst CIMMYT's staff and partners. Coupled with follow-up activities, these have made it possible for social and biophysical...
Tipo: Report
Palavras-chave: Impact; Assessment; CIMMYT; ILAC; CGIAR; Agricultural and Food Policy; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/52528

Ensaio de competição regional de milho no Territorio Federal do Amapá.
Provedor de dados: 14
Autores: CAVALCANTE, E. da S.; BARRIGA, R. H. M. P.; MONTEIRO FILHO, E. dos S.
Analisar o comportamento de cultivares de milho adaptados as condições ecologicas do Territorio. Através de comparação dos genotipos introduzidos com as cultivares locais, foi conduzido, em 1982, o ensaio de competição regional de cultivares de milho com vistas a identificação de materiais geneticos capazes de serem utilizados nos diversos sistemas de produção local.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Comportamento; Brasil; Amapá; Maize.; Cerrado; Milho; Variedade; Zea Mays.; Varieties; Savannas; Yields.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/341736

Ensaio ecológica para adaptação de variedades e compostos de milho do CIMMYT. In: Desenvolvimento de novos sistemas de produção e aperfeiçoamento daqueles em uso nos Cerrados.
Provedor de dados: 14
Autores: BATISTA, L. A. R.
Definição de complexos de germoplasma para as diferentes regiões, baseando-se na variabilidade de condições ecológicas existentes.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Sistemas de produção; Maize; Production of systems.; Cereal; Milho.
Ano: 1976
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/42263

Ensaio regional e campos de observação de milho.
Provedor de dados: 14
Autores: BARRIGA, R. H. M. P.; MOTA, M. G. da C.; SILVA, J. F. da; SARMANHO, F. R.; GIANLUPPI, V.; FERNANDES, A. A. C.; STEVAN, P. H.
bitstream/item/57629/1/CPATU-PA41.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Melhoramento genético; Maize; Plant introduction.; Competição de Variedade; Introdução de Planta; Milho; Produtividade.; Plant breeding; Variety trials; Yields.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378087

Ensiling - Wet-storage method for lignocellulosic biomass  for bioethanol production
Provedor de dados: 21
Autores: Oleskowicz-Popiel, Piotr; Thomsen , Anne Belinda; Schmidt, Jens Ejbye.
Ensiling of humid biomass samples wrapped in plastic bales has been investigated as a wet-storage for bioethanol production from three lignocellulosic biomass samples i.e. maize, rye, and clover grass. During the silage process, lactic acid bacteria fermented free sugars to lactic acid, and consequently by lowing pH, inhibiting other microbes to degrade the polysaccharides. Following silage treatment, enzymatic convertibility tests showed that 51.5%, 36.5%, and 41.9% of the cellulose was converted by cellulytic enzymes in ensiled maize, rye, and clover grass, respectively. In addition, tests of SSF (simultaneous saccharification and fermentation) were carried out using combined enzymatic hydrolysis and fermentation with two different microorganisms...
Tipo: Journal paper
Palavras-chave: Post harvest management and techniques.
Ano: 2011
URL: http://orgprints.org/19013/4/19013.pdf

Enteropathogenic bacterial contamination of a latosol following application of organic fertilizer
Provedor de dados: 1
Autores: Escosteguy, Pedro Alexandre; Tissot, Bernardo da Silva; Cherubini, Rafael Mariath; Pauletto, Cristiano; Scheffer-Basso, Simone Meredith.
Poultry manure is used as fertilizer in natura, but little is known about whether it contaminates the soil with pathogenic organisms. The aim of this study was to assess the effects of organic, organomineral and mineral fertilizers on soil contamination by enteric pathogens, using poultry manure as the organic fertilizer. Manure was applied in field experiments at rates of 7.0 ton. ha-1 (maize crop, 2008/2009), 8.0 ton. ha-1 (wheat crop, 2009) and 14 ton. ha-1 (maize crop, 2010/2011). Organomineral fertilizer was applied at the same rates but was comprised of 50% manure and 50% mineral fertilizer. At 30 and 70 days after fertilization, the organic fertilizer and the upper 0-5 cm layer of the soil were tested for the presence of helminth eggs and larvae and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 50101005 soil contamination; Soil quality; Triticum aestivum; Zea mays.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19387

Entomological research during 1974
Provedor de dados: 106
15 ill., 15 tables
Palavras-chave: Corn; Maize; Sorghum; Insect pests; Entomology; Shoot fly; Varieties; Pest resistance; Population dynamics; Yields; Losses; ข้าวโพด; ข้าวฟ่าง; แมลงศัตรูพืช; กีฏวิทยา.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3803

Entomological research during 1975
Provedor de dados: 106
Autores: Somnuk Wongthong; Somporn Patanakamjorn; Young, W.R.; Anuchit Chinajariyawong; Pramual Chaitooptong; Surachate Jamornmarn.
8 ill., 6 tables
Palavras-chave: Corn; Maize; Sorghum; Entomology research; Insect pests; Shoot fly; Stem borers; Varieties; Pest resistance; Population dynamics; Yields; ข้าวโพด; ข้าวฟ่าง; กีฏวิทยา; แมลงศัตรูพืช.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3843

Entomological research during 1976
Provedor de dados: 106
Autores: Somnuk Wongthong; Anuchit Chinajariyawong; Young, W.R.; Pramual Chaitooptong.
9 tables
Palavras-chave: Corn; Maize; Sorghum; Entomological research; Shoot fly; Armyworms; Webworms; Thrips; Patanga; Rose beetle; Corn earworm; Grain weevils; Pest insects; Economic injury thresholds; Selection; Varieties; Pest resistance; Insecticides; Insect control; Atherigona soccata; Mythimna separata; Stenachroia elongella; Adoretus compressus; ข้าวโพด; ข้าวฟ่าง; งานวิจัยด้านกีฏวิทยา; หนอนแมลงวันเจาะยอดข้าวฟ่าง; หนอนเจาะฝัก; หนอนใย; เพลี้ยไฟ; ตั๊กแตนปาทังก้า; ด้วงกุหลาบ; หนอนเจาะฝัก; มอด.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3877

Entomological research in corn and sorghum
Provedor de dados: 106
Autores: Yoovadee Rangdang; Surachate Jamornmarn; Reynaud, Gonzalo Granados.
3 ill., 11 tables
Palavras-chave: Corn; Maize; Sorghum; Shoot fly; Corn stem borer; Entomological research; ข้าวโพด; ข้าวฟ่าง; หนอนแมลงวันเจาะยอดข้าวฟ่าง; หนอนเจาะลำต้นข้าวโพด.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3766

Entwicklung von Maissorten für den Ökologischen Anbau
Provedor de dados: 21
Autores: Jung, Rüdiger; Becker, Heiko; Stever, Mareile.
Mais wird im ökologischen Landbau bisher wenig angebaut, obwohl er sowohl als Futterpflanze als auch als Marktfrucht von großem Nutzen sein könnte. Ein Grund hierfür ist, dass der Anbau unter ökologischen Bedingungen höhere und teilweise andere Ansprüche an dem Mais stellt als der unter konventionellen Bedingungen. Die Konkurrenzfähigkeit gegenüber Unkraut ist dabei das am stärksten ökospezifische Merkmal. Dazu wurden pflanzenbauliche und pflanzenzüchterische Untersuchungen durchgeführt.   In dreijährigen pflanzenbaulichen Versuchen an zwei ökologisch bewirtschafteten Standorten im südlichen Niedersachsen (Reinshof, Wiebrechtshausen) wurden bei verschiedenen Maissorten acht Untersaat-Varianten geprüft. Mit allen UntersaatVarianten konnte die Sprossmasse...
Tipo: Report
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2015
URL: http://orgprints.org/30720/1/30720-10OE108-uni-goettinge-jung-2015-oekomais-AP1.pdf

Entwicklung von Maissorten für den Ökologischen Anbau - Teilprojekt KWS Saat AG
Provedor de dados: 21
Das hier beschriebene Projekt ist Teil eines Verbundvorhabens, das folgende Teilprojekte umfasst: FKZ 10OE107, FKZ 10OE108, FKZ 10OE074.   Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/cgi/saved_search?savedsearchid=1332.   Mais spielt bisher im ökologischen Anbau eine weit geringere Rolle als in der konventionellen Landwirtschaft. Gerade für den ökologischen Landbau wären aber sowohl Körner- als auch Silomais als auf dem Hof erzeugtes Futter von großem Interesse. Mais bietet als energiereiche Pflanze eine ideale Ergänzung zum proteinreichen Futter aus Kleegras. Unter ökologischen Bedingungen ist der Anbau von Mais jedoch besonders...
Tipo: Project description
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2023
URL: http://orgprints.org/18855/1/Projekt_10OE107_dt.doc

Entwicklung von Maissorten mit spezieller Anpassung an die Bedingungen des Ökologischen Landbaus
Provedor de dados: 21
Autores: Burger, H.; Schloen, M.; Schmidt, W.; Geiger, H.H.
Organic farming has gained in importance in Germany during the past years. Therefore an increasing demand exists for varieties with specific adaptation to this farming system. Hence it becomes necessary for plant breeders to optimize their selection strategy for varieties which meet the requirements of organic farming. For this purpose a research project was conducted at the University of Hohenheim, Institute of Plant Breeding, Seed Science, and Population Genetics in cooperation with the KWS SAAT AG. It was supported by the “Bundesprogramm Ökologischer Landbau” and lasted from April 2004 to December 2006. In the present contribution the results of comparative  trials with maize  under organic and conventional farming conditions in 2004 and 2005 are...
Tipo: Conference paper, poster, etc.
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2007
URL: http://orgprints.org/9669/1/9669_Burger_Vortrag.pdf

Entwicklung von Populationen bei Mais (Zea mays L.)  Selektionseffizienz und Leistungsfähigkeit
Provedor de dados: 21
Autores: Eder, B.; Büttner, B.; Schweizer, G.; Mohler, V.; Albrecht, T.; Eder, Joachim.
Maize is one of the most important crops around the world. Global players in seed production offer more than hundreds of different varieties. All of them are hybrids whereas open pollinated varieties (OPVs) are rare or extinct. In Germany (and many other European countries) no new OPVs are registered; efforts to do so failed in the past. The main advantage of OPVs is their phenotypic and genetic heterogeneity and thus their ability to adapt to different environmental conditions. This could be of utmost  interest facing the complex challenge of climate change. Populations based on new breeding material were developed and tested in comparison to actual hybrids and  landraces. While the new populations achieved about 80 % of the hybrid yield, landraces failed...
Tipo: Conference paper, poster, etc.
Palavras-chave: Root crops.
Ano: 2017
URL: http://orgprints.org/31831/1/Windows%207%20printed%20document-4.pdf

Environmental impact and macro-economic feasibility of organic agriculture in the Danube River Basin
Provedor de dados: 21
Autores: Znaor, Darko; Kieft, Henk.
Several studies from the mid-nineties pointed to agriculture as the single biggest nutrient polluter of the surface water in the Danube River Basin (Haskoning, 1994). Following these findings, the EU Phare programme awarded in 1995 a four-year education and research project aimed at introducing and assessing feasibility of organic agriculture in three Danube River countries: Bulgaria, Hungary and Romania. So far it is the biggest and most elaborate project on organic agriculture ever implemented in these three countries. The project consisted of a spectrum of training, on-farm demonstration and research/study activities, and prepared strategy papers for policy redesigning. The studies and research performed assessed the impact of organic agriculture on (i)...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farm economics; Farming Systems; Crop husbandry; Social aspects; Air and water emissions; Soil; Biodiversity and ecosystem services; Policy environments and social economy; Environmental aspects; Farm nutrient management; Knowledge management.
Ano: 2000
URL: http://orgprints.org/26413/1/books.jpg

Environmental regulation and international trade patterns for agro-industrial under a South-North Perspective
Provedor de dados: 31
Autores: Feix,   Rodrigo Daniel; Miranda,   Silvia Helena Galvao de; Barros,   Geraldo Sant'Ana de Camargo.
This paper aims at examining the relation between the international trade and the environment, particularly focused on sensitive agribusiness sectors. It consists on an empirical test to the conflicting positions supported by economists, some following the traditional approach (trade-off or neoclassical), while others supporting the Porter’s hypothesis, which considers that impacts of the stricter environmental regulation can benefit the trade competitiveness. A Heckscher-Ohlin- Vanek model was applied to net exports as the dependent variable. The agricultural products analyzed were total agriculture, rice, maize, soybean, wheat, dairy and swine; run for 97 countries, divided as developing and developed, in a cross-section approach. This modeling allows...
Tipo: Conference Paper or Presentation
Palavras-chave: Trade; Environmental regulation; Agribusiness; Environmental Economics and Policy; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/44329

Enzymatic antioxidant responses to biostimulants in maize and soybean subjected to drought
Provedor de dados: 63
Autores: Vasconcelos,Ana Carolina Feitosa de; Zhang,Xunzhong; Ervin,Erik H.; Kiehl,Jorge de Castro.
Water stress is one of the most important environmental factors inducing physiological changes in plants, such as decrease in the water potential of the cells, the stomatal closure; and the development of oxidative processes mediated by reactive oxygen species (ROS). Antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) are efficient scavengers of ROS. The aim of this research was to examine how the application of biostimulant based on humic substances and aminoacids may affect activity levels of SOD, CAT, and APX of maize and soybean plants under well-watered or drought stress conditions. Pots (4.5 L) were filled with a Typic Hapludult soil where the biostimulants doses were applied. It was taken leaf samples in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Superoxide dismutase; Catalase; Ascorbate peroxidase; Water status.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300015

Enzyme Polymorphism in Sitophilus oryzae (Linnaeus, 1763) and Sitophilus zeamais (Motschulsky, 1855) (Coleoptera, Curculionidae) in southern Brazil
Provedor de dados: 3
Autores: Bespalhok, Danielle das Neves; Renesto, Erasmo; Signorini, Tiago.
Beetles of the species Sitophilus oryzae and S. zeamais are pests of great economic importance since they attack not only rice and maize but also several other cereals. In fact, these beetles are one of the most visible threats to sustainable food production. Current study estimated the genetic variability of S. oryzae in two samples, one from the State of Paraná (PR), Brazil, and another from the state of Rio Grande do Sul (RS), Brazil, and a sample of S. zeamais from the State of Santa Catarina (SC), Brazil. Isozyme electrophoresis in starch gel technique was employed to analyze eight enzyme systems (AAT, ACP, GDH, GPI, IDH, MDH, PGM and ME). Average heterozygosity rates were 0.0091, 0.0100 and 0.0000 and expected heterozygosity rates were 0.0419, 0.0452...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências Biológicas  Genética. pest insect; Stored grains; Starch gel; Electrophoresis; Heterozygosity Genética.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/25143

Equations for calculating N-fertilizer rates for maize from soil analysis
Provedor de dados: 106
Autores: Amnat Suwanarit; Piya Chalermlin; Jarong Rungchuang.
8 ill., 3 tables
Palavras-chave: Corn; Maize; Soil analysis; N fertilizers; ข้าวโพด; การวิเคราะห์ดิน; อัตราปุ๋ย; ปุ๋ยไนโตรเจน.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4503

Equilíbrio de bases no solo e produção de matéria seca de milho (Zea mays L.) em solos tratados com lodo de esgoto, carbonato de cálcio e cal virgem - DOI: 10.4025/actasciagron.v29i5.752
Provedor de dados: 1
Autores: Brabosa, Graziela Moraes de Cesara; UEL; Tavares Filho, João; UEL; Brito, Osmar Rodrigues; UEL; Fonseca, Inês Cristina de Batista; UEL.
O lodo de esgoto pode ter diferentes disposições finais, dentre os quais o uso agronômico. Nesse caso, é necessário conhecer as características do lodo, do solo, da planta e suas interações, bem como o clima e o local a ser aplicado. Este trabalho teve o objetivo de verificar a influência do lodo de esgoto, com e sem adição de cal, no equilíbrio do solo e na produção de matéria seca do milho. O experimento foi conduzido em vasos e em ambiente de casa de vegetação, utilizando-se terra da camada superficial (0-15 cm) de dois solos: a primeira amostra (S1), com textura argilosa, foi coletada em um Latossolo Vermelho eutroférrico sob plantio direto, e a segunda amostra (S2), com textura arenosa, foi coletada em um Latossolo Vermelho distrófico sob pastagem....
Palavras-chave: 5.00.00.00-4    Ciências Agrárias biossólidos; Saturação de bases; Calagem; Lodo de esgoto 5.00.00.00-4    Ciências Agrárias.
Ano: 2007
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/752

Equilibrium sorption isotherm studies of Cd(II), Pb(II) and Zn(II) ions detoxification from waste water using unmodified and EDTA-modified maize husk
Provedor de dados: 69
Autores: Igwe,Jude C; Abia,Augustin A.
The mobilization of heavy metals in the environment due to industrial activities is of serious concern due to the toxicity of these metals in humans and other forms of life. The equilibrium adsorption isotherms of Cd(II), Pb(II) and Zn(II) ions, detoxification from waste water using unmodified and EDTA-modified maize husk have been studied. Maize husk was found to be an excellent adsorbent for the removal of these metal ions. The amount of these metal ions adsorbed increased as the initial concentration increased. Also, EDTA-modification enhanced the adsorption capacity of maize husk due to the chelating ability of ethylenediamine tetra acetic acid (EDTA). Among the three adsorption isotherms tested, Dubinin-Radushkevich isotherm gave the best fit with R²...
Tipo: Journal article
Palavras-chave: Adsorption isotherm; EDTA; Heavy metals; Maize husk; Waste water.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582007000400007

Erhebung zur Ausbildung von Wurzelknöllchen an Stangen- und  Feuerbohnen im Gemengeanbau mit Silomais
Provedor de dados: 21
Autores: Fischer, Jenny; Böhm, Herwart.
Since maize bean intercropping is not a common system in Germany, the nodulation of four cultivars of Phaseolus vulgaris and two cultivars of P. coccineus in intercropping with silage maize was evaluated at the end of bean flowering. The root samples were taken in 2015 from a randomized field trial with four replications at the  Thünen Institute of Organic Farming with six samples per plot. The number of root nodules, dry matter weight of nodules and nodule activity were assessed. The statistical analysis, which was conducted with the SAS-program for nonparametric ANOVA, showed significant differences for dry matter weight and number of root nodules between the bean cultivars.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Crop husbandry Root crops.
Ano: 2017
URL: http://orgprints.org/31745/1/Erhebung%20zur%20Ausbildung%20von%20Wurzelkn%C3%B6llchen%20an%20Stangenund.pdf

Ertrag und Futterqualität sowie Fruchtfolgewirkung von Mais und Getreide/ Getreideleguminosengemenge in Öko-Betrieben
Provedor de dados: 21
Autores: Leisen, Edmund.
Zwischen 1996 und 1999 wurden in Westfalen-Lippe auf 8 Flächen Mais und Getreide (Sommergerste oder Sommerweizen, in Reinsaat oder in Gemenge mit Erbsen) hinsichtlich Ertragsleistung und Futterqualität miteinander verglichen. Die Versuche waren jeweils mit 2 Wiederholungen als Streifenversuch (12 m Streifen) angelegt. Auf 7 Flächen wurde zusätzlich die Fruchtfolgewirkung festgehalten, je nach Fläche mittlerweile bis zur 5. Folgefrucht.  Silomais lieferte mit 67.000 bis 119.000 MJ NEL/ha teilweise doppelt so hohe Erträge wie Getreide gewonnen als Ganzpflanzensilage. Dabei wurden die Erträge von Zwischenfrüchten schon mit berücksichtigt: Landsberger Gemenge vor Mais, Zwischenfrucht nach Getreide. Maissilage war darüber hinaus deutlich energiereicher als...
Tipo: Conference paper, poster, etc.
Palavras-chave: Pasture and forage crops Cereals; Pulses and oilseeds Crop combinations and interactions Feeding and growth.
Ano: 2003
URL: http://orgprints.org/1080/1/1080%2Dleisen%2De%2D2003%2Dfruchtfolgewirkung%2Dmais.pdf

Ertrag und Futterwert von Mais-Bohnen Gemengen als Ganzpflanzensilage in der Milchviehfütterung
Provedor de dados: 21
Autores: Fischer, Jenny; Böhm, Herwart.
Silage maize is a valuable forage crop for dairy cows in Organic Farming due to its high energy concentration and the high yield potential. One limitation to maize silage as a feed for dairy cows is the low crude protein concentration (Armstrong et al. 2008). To improve the protein content of maize silage a field experiment of maize-bean intercropping was carried out at the Institute for Organic Farming (Schleswig-Holstein, sL, 740 mm, 8.7°C). In the experiment different bean varieties (Phaseolus vulgaris, Phaseolus coccineus, Vicia faba) and -species are evaluated. Especially the climbing Phaseolus beans have the potential to increase the protein content due to their high biomass production. The aim of the field experiment is to detect maize-bean...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Feeding and growth Germany.
Ano: 2013
URL: http://orgprints.org/21482/1/21482_Fischer.pdf

Ertrag von Mais und Sojabohnen im biologischen und konventionellen Anbausystem des DOK-Versuchs
Provedor de dados: 21
Autores: Mäder, Paul; Fliessbach, Andreas; Niggli, Urs; Gunst, Lucie; Mayer, Jochen.
Sustainable food and feed production is becoming a major issue with regard to the growing world’s population and the scarcity of non-renewable resources such as energy and fertilizers. Long-term trials offer the unique opportunity to assess the performance of cropping systems over decades, providing meaningful data. While many studies have proven, that organic farming generally increases soil fertility and biodiversity, long-term productivity of organic systems is questioned. Here we show that across all crops of a seven year rotation, yields of the organic system were approx. 81% of those of the conventional system in the fifth rotation period of the DOK trial (2006-2012), but with much lower input of nutrients and pesticides. Two major food and feed...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Crop husbandry Soil Root crops.
Ano: 2013
URL: http://orgprints.org/21600/1/21600_Maeder.pdf

Ertragsbildung von unterschiedlichen Kulturarten für die  Biogaserzeugung im ökologischen Landbau
Provedor de dados: 21
Autores: Lyson, D. F.; Rinnofner, T.; Hrbek, R.; Leonhartsberger, C.; Amon, T.; Hein, W.; Friedel, J. K.
Energy crops for biogas production need to be integrated into sustainable and site  adapted crop rotation systems, minimising the competition with food production.  Luzerne/clover (-grass), sun flower, maize, green-rye + maize and vetch-rye + maize  were compared at two sites in Austria with semi-arid (Raasdorf) and humid (Lambach)  conditions with and without biogas slurry application. The yield of legumes and  fertilised non-legumes at the humid site were 9 % to 56 % higher then at the semi-arid  site. The 2-crop system maize following vetch-rye achieved the highest yields at both  sites. Slurry from the biogas plant increased the yield only at the humid site.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Crop husbandry; Composting and manuring.
Ano: 2009
URL: http://orgprints.org/14409/1/Lyson_14409.pdf

Espaçamento e adubação nitrogenada e potássica em cobertura na cultura do milho - DOI: 10.4025/actasciagron.v29i4.414
Provedor de dados: 1
Autores: Deparis, Gelavir Antonio; coopavel; Lana, Maria do Carmo; UNIOESTE Ml. Candido Rondon; Frandosolo, Jucenei Fernando; UNIOESTE Ml. Cândido do Rondon.
Objetivou-se com este trabalho avaliar o efeito da redução de espaçamento entrelinhas e da adubação nitrogenada e potássica em cobertura, na eficiência de absorção de nutrientes, no rendimento de grãos, componentes da produção e outras características agronômicas de híbrido simples de milho. O experimento foi instalado em Cascavel, Estado do Paraná, no ano agrícola de 2004/05. Foram estudados três espaçamentos entrelinhas (0,45; 0,67 e 0,90 m), com uma população de 55000 plantas ha-1. O delineamento experimental utilizado foi de blocos ao acaso com quatro repetições, em esquema de parcela subdividida. Utilizaram-se 13 combinações de sete doses de nitrogênio (8; 20; 40; 80; 120; 140 e 152 kg ha-1 de N) com sete doses de potássio (3; 7,5; 15; 30; 45; 52,5 e...
Palavras-chave: 5.01.00.00-9    Agronomia Zea mays L.; Arranjo de plantas; Nitrogênio; Potássio.
Ano: 2007
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/414

Esquema de acceso al financiamiento en la red de innovación asteca-maíz. Caso: Región Norte del Estado de Guerrero.
Provedor de dados: 32
Autores: Bertrand Martínez, Tonatiuh.
Una situación de las familias rurales del Estado de Guerrero es su déficit promedio de 631 kg/año de maíz para consumo. Dada la importancia de este grano para las familias, se implementó en el 2007 la Red de Innovación ASTECA-MAÍZ en municipios de alta y muy alta marginación para mejorar el rendimiento en la producción de maíz a través de innovaciones. Se ha logrado incrementar el rendimiento promedio en 730.09 kg/ha al pasar de 3,465.3 kg/ha de las parcela testigo a 4,196.09 kg/ha en las Parcelas de Innovación. Las innovaciones se están adoptando, sin embargo, hay un alto porcentaje de productores con rendimientos promedio de 2,600 kg/ha que al querer innovar tienen la limitante de falta de recursos económicos. Se propone un Esquema de Acceso al...
Palavras-chave: Maíz; Innovación; Financiamiento; Corn; Innovation; Financing; Economía; Doctorado.
Ano: 2011
URL: http://hdl.handle.net/10521/595

Essential oils on the control of stem and ear rot in maize
Provedor de dados: 65
Autores: Teixeira,Glauco Antonio; Alves,Eduardo; Amaral,Douglas Carvalho; Machado,José da Cruz; Perina,Fabiano José.
Stem and ear rot caused by Stenocarpella maydis are responsible for severe losses in maize production. Treatment of seeds with fungicides may induce environmental damage. Hence, this study aimed to evaluate the effects of essential oils extracted from Cymbopogon winterianus, Thymus vulgaris, Cymbopogon citratus, Corymbia citriodora, Cinnamomum zeylanicum, and Syzygium aromaticum on the development of in vitro S. maydis. In addition, maize seeds were treated with these essential oils to determine their possible mode of action and effects. The oils from S. aromaticum, C. zeylanicum, and T. vulgaris inhibited fungal development at concentrations higher than 0.025%. The oils from S. aromaticum and C. zeylanicum showed seed germination rates of 89.0% and 84.5%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stenocarpella maydis; Zea mays; Alternative control; Electron microscopy.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001100004

Estimación de parámetros genéticos en cruzas intervarietales de maíz para la región semicálida de Guerrero.
Provedor de dados: 32
Autores: Palemón Alberto, Francisco.
La orografía y agroecología del estado de Guerrero es muy diversa. En las áreas de altitud intermedia (1200 a 1700 m) prácticamente no se siembran con variedades mejoradas de maíz, debido a su limitada adaptación a las condiciones climáticas y edáficas; por lo que, prevalece la siembra de poblaciones nativas. En las áreas semicálidas se ha seleccionado germoplasma subtropical local; paralelamente, en Valles Altos se aplicó selección para adaptación en cuatro poblaciones tropicales durante 10 años. Con estas siete poblaciones progenitoras se generaron 12 cruzas intervarietales (CI) en arreglo factorial, con el propósito de valorar los avances del mejoramiento genético y detectar alguna CI de valor comercial. Las CI, sus progenitores y testigos se evaluaron...
Palavras-chave: Zea mays L.; Variedades tropicales y subtropicales; Aptitud combinatoria general y específica; Heterosis; Estabilidad; Rendimiento de grano; Tropical and subtropical varieties; General and specific combining ability; Stability; Grain yield; Genética; Doctorado.
Ano: 2010
URL: http://hdl.handle.net/10521/284

Estimates of genetic parameter in maize commercial variety IPR 114 at Paraná State, Brazil - doi: 10.4025/actasciagron.v33i4.8367
Provedor de dados: 1
Autores: Rovaris, Sara Regina Silvestrin; Universidade Estadual de Londrina; Araújo, Pedro Mário de; Instituto Agronômico do Paraná; Garbuglio, Deoclécio Domingos; Instituto Agronômico do Paraná; Prete, Cássio Egídio Cavenaghi; Universidade Estadual de Londrina; Zago, Valquíria Sheila; Universidade Estadual de Londrina; Silva, Lucas José Ferreira da; Universidade Estadual de Londrina.
The objective of this study was to estimate the genetic parameters of the IPR 114 maize commercial variety for breeding purpose and the efficiency of the method. It was perfomed two cycles of half-sib progenie, between 2004 and 2007. The progenies were evaluated in a randomized complete block desing with two replications per environments and the plots were composed of one 4 m length row spaced on 0.8 m, and five plants per meter. The trials were carried out in Londrina and Ponta Grossa, Paraná State, Brazil. There were evaluated 173 and 154 progenies for selection cycles 1 and 2, respectively, analyzing the following traits: plant height, ear height, days to flower, prolificacy and predict grain yield. In both cycles verified  significant genetic...
Tipo: Pesquisa empírica de campo
Palavras-chave: Melhoramento Genético de plantas; Milho Zea mays L.; Progeny of maize; Genetic gain; Intrapopulacional selection Melhoramento genético Zea mays L.; Progeny of maize; Genetic gain; Intrapopulacional selection.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/8367

Estimates of the increase in milk production due to the introduction of maize silage to a dairy farm in KwaZulu-Natal: A time series approach
Provedor de dados: 31
Autores: Mkhabela,   Thulasizwe S.
A method involving time series modelling is provided for evaluating the effects of an abrupt intervention, such as the adoption of a new technology, when no control is available for comparative evaluation. The new technology was the introduction of maize silage into the feeding programme of a dairy farm in the midlands of KwaZulu-Natal. A model was developed using historical milk data from a nine-year period. The model was used to forecast subsequent milk production on the dairy farm had maize silage not been introduced, and these forecasts were compared with actual production after the introduction of maize silage. Milk production was more than 320,000 litres greater than forecast in ten seasons over a four-year period after the introduction of silage....
Tipo: Journal Article
Palavras-chave: Livestock Production/Industries.
Ano: 2004
URL: http://purl.umn.edu/9492

ESTIMATING COST EFFICIENCY AMONG MAIZE PRODUCERS IN KENYA AND UGANDA
Provedor de dados: 31
Autores: Kirimi,   Lilian; Swinton,   Scott M.
A translog stochastic cost frontier is estimated to calculate cost efficiency index (CEI) of 203 Kenyan and Ugandan maize producers using survey data from 2003. Results show a mean CEI of 1.95, with greater inefficiency among farms in Kenya of medium-large size. Key sources of inefficiency are late planting and use of recycled seed.
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2004
URL: http://purl.umn.edu/20396

Estimating the Benefits from Improved Market Information
Provedor de dados: 31
Autores: Kizito,   Andrew M.
Using a partial equilibrium model, the benefits of providing improved agricultural market information to farmers and small-scale traders of maize, millet, sorghum and paddy rice in Mali are estimated.  The value of information is estimated as the reduction in dead-weight loss when farmers and small-scale traders with rational expectations respond to improved price forecasts from Market Information Systems.  The study finds that benefits from improved information, which can also be viewed as a reduction of the cost of being off the equilibrium price and quantity, are great when there is high uncertainty about future prices, high own-price elasticity of supply, low own-price elasticity of demand, and high value of crop output.  The study suggests that...
Tipo: Thesis or Dissertation
Palavras-chave: Marketing.
Ano: 2009
URL: http://purl.umn.edu/48844

Estimating the development of landrace and improved maize cultivars as a function of air temperature
Provedor de dados: 65
Autores: Langner,Josana Andreia; Streck,Nereu Augusto; Dalmago,Genei Antonio; Reiniger,Lia Rejane Silveira; Durigon,Angelica; Silva,Stefanía Dalmolin da; Lago,Isabel; Scheffel,Lúcio Gabriel; Poersch,Anderson Haas.
ABSTRACT: The objective of this study was to determine the maximum development rates for the phases of emergence, vegetative and reproductive, and to test the performance of the Wang and Engel (WE) model for simulating the development of landrace and improved maize cultivars sown on different dates. Model calibration was with data collected from a field experiment with a sowing date on December 13, 2014, and the model was tested with independent data from experiments with five sowing dates (August 20 and November 4, 2013, February 3 and August 15, 2014, and January 7, 2015) in Santa Maria, RS. The experiment was a complete randomized block design with four replicates. The dates of emergence (EM), silking (R1), and physiological maturity (R6) of two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L; Modeling; Phenology; Developmental stages.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001737

Estimation of irrigation water requirement of maize (Zea-mays) plants using Pan-Evapouration method in Maiduguri, N.E Nigeria
Provedor de dados: 111
Autores: Ijasini John Tekwa; Lecturer; Emmanuel Kefas Bwade; Lecturer.
ABSTRACT Estimation of irrigation water requirement of maize (Zea-mays) was conducted based on a ten (10) year rainfall data (1986-1995) of Maiduguri, Borno state using pan evaporation method. Climatic parameters including potential evapotranspiration (ETo), maize crop evapotranspiration (ETm), effective rainfall (Pe), and maize crop irrigation water requirement (IWRm) were estimated using prescribed procedures. The result showed that the Pe for Maiduguri was lowest in June (1.09mm/day) and highest in August (3.91mm/day). Both ETo(8.70mm/day) and ETm(4.35mm/day) recorded highest estimates in June and declined sharply in the months of August and October, respectively. The IWRm for Maiduguri was estimated at 3.26, 0.11, 0.05, 1.81 and 1.24mm per day for the...
Ano: 2011
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1552

ESTIMATION OF MAIZE BIOMASS USING UNMANNED AERIAL VEHICLES
Provedor de dados: 70
Autores: Calou,Vinícius B. C.; Teixeira,Adunias dos S.; Moreira,Luis C. J.; Rocha Neto,Odílio C. da; Silva,José A. da.
ABSTRACT Unmanned aerial vehicles (UAVs) are a promising tool for technology development and transfer and for the economic success of the agricultural sector. The objective of this study is to assess the validity of biomass estimation in a commercial maize plantation using aerial images obtained by a UAV. The proposed methodology involved analyzing images acquired in scheduled flights, processing orthophoto (georeferenced image) data, evaluating digital terrain elevation models, and assessing the quality of dense point clouds. Data were collected using two cameras, one with a 16-megapixel flat lens and the other with a 12-megapixel fish-eye lens coupled to a UAV, at two flight altitudes (30 and 60 meters) over hybrid maize (AG1051) crop irrigated by center...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Precision agriculture; Structure from Motion; Unmanned aerial vehicles; Zea mays L.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600744

Estimation of post-harvest losses of corn products in farmers fields
Provedor de dados: 106
Autores: Vesaurai, S.; Watanasan, A.; Boonchuduang, P.; Jitathai, V.; Duangratana, S.
12 tables
Palavras-chave: Corn; Maize; Post-harvest losses; Yields; Economic losses; ข้าวโพด; วิทยาการหลังการเก็บเกี่ยว; ความอุดมสมบูรณ์ของดิน; การขาดน้ำ; วัชพืช; การหักล้ม; แมลงศัตรูพืช; โรคพืช.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3995

Estimation of the nitrogen fertilizer requirement of corn on a clay loam soil
Provedor de dados: 106
Autores: Samonte, Henry P.; Aglibut, Teresita E.
3 ill., 4 tables
Palavras-chave: Corn; Maize; Nitrogen fertilizers; Clay loam soil; Yields; ข้าวโพด; ปุ๋ยไนโตรเจน; ดินเหนียวปนทราย.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3889

Estimation of weed dry biomass and grain yield as a function of growth and yield traits under allelopathic weed management in maize
Provedor de dados: 87
Autores: MAHMOOD,A.; KHALIQ,A.; IHSAN,M.Z.; NAEEM,M.; DAUR,I.; MATLOOB,A.; EL-NAKHLAWY,F.S.
Growing concerns about toxicity and development of resistance against synthetic herbicides have demanded looking for alternative weed management approaches. Allelopathy has gained sufficient support and potential for sustainable weed management. Aqueous extracts of six plant species (sunflower, rice, mulberry, maize, brassica and sorghum) in different combinations alone or in mixture with 75% reduced dose of herbicides were evaluated for two consecutive years under field conditions. A weedy check and S-metolachlor with atrazine (pre emergence) and atrazine alone (post emergence) at recommended rates was included for comparison. Weed dynamics, maize growth indices and yield estimation were done by following standard procedures. All aqueous plant extract...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Allelopathy; Crop growth indices; Mulberry; Plant combinations.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100023

Estimativa de custo de produção de milho 1ª safra, 2001/02, em Mato Grosso.
Provedor de dados: 14
Autores: MELO FILHO, G. A. de; RICHETTI, A.
bitstream/item/69337/1/CPAO-COM.-TEC.-43-01.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Mato Grosso; Maize.; Custo de Produção; Cerrado; Milho; Zea Mays.; Brazil; Production costs.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/244414

Estimativa de custo de produção de milho 1ª safra, 2001/02, em Mato Grosso do Sul.
Provedor de dados: 14
Autores: MELO FILHO, G. A. de; RICHETTI, A.
bitstream/item/38647/1/COT200142.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Mato Grosso do Sul; Maize.; Custo de Produção; Cerrado; Milho; Zea Mays.; Brazil; Production costs.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/244413

Estimativa de custo de produção de milho 2ª safra de 2002, no sistema plantio direto.
Provedor de dados: 14
Autores: RICHETTI, A.; MELO FILHO, G. A. de.
bitstream/item/24866/1/COT200251.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Milho safrinha; Maize; Direct sowing.; Custo de Produção; Cerrado; Plantio Direto; Zea Mays.; Production costs.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/244418

Estimativa de custo de produção de milho, no sistema plantio direto e no plantio convencional, safra 1998/99.
Provedor de dados: 14
Autores: RICHETTI, A.; MELO FILHO, G. A. de.
bitstream/item/39455/1/Cot34-98.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize; Direct sowing.; Custo de Produção; Cerrado; Milho; Plantio Direto; Zea Mays.; Production costs.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/241555

Estimativa de custo de produção de milho, nos sistemas plantio direto e convencional, safra 1999/2000.
Provedor de dados: 14
Autores: MELO FILHO, G. A. de; MENDES, D. S.
bitstream/item/24906/1/COT199903.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize; Direct sowing.; Custo de Produção; Cerrado; Milho; Plantio Direto; Zea Mays.; Production costs.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/241927

Estimativa de custo de produção de milho, safra 1996/97.
Provedor de dados: 14
Autores: RICHETTI, A.; MELO FILHO, G. A. de; PARIZOTO, A. M.
bitstream/item/65969/1/CPAO-COM.-TEC.-14-96.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize; Production; Costs.; Custo; Estimativa; Milho; Produção; Zea Mays.; Corn.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/240249

Estimativa de custo de produção de milho, safra 1997/98.
Provedor de dados: 14
Autores: RICHETTI, A.; MELO FILHO, G. A. de.
bitstream/item/39436/1/Cot21-97.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize.; Custo de Produção; Cerrado; Estimativa; Milho; Zea Mays.; Production costs.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/240755

Estimativa de custo de produção de milho, safra 2000/2001, em Mato Grosso.
Provedor de dados: 14
Autores: MELO FILHO, G. A. de; LEMES, M. M. R.
bitstream/item/65582/1/Cot19-2000.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Mato Grosso; Maize.; Custo de Produção; Cerrado; Milho; Zea Mays.; Brazil; Production costs.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/243126

Estimativa de custo de produção de milho, safra 2000/2001, em Mato Grosso do Sul.
Provedor de dados: 14
Autores: MELO FILHO, G. A. de; LEMES, M. M. R.
bitstream/item/24900/1/COT200015.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Mato Grosso do Sul; Maize.; Custo de Produção; Cerrado; Milho; Zea Mays.; Brazil; Production costs.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/243209

Estimativa de custo de sistema de produção de arroz, milho e mandioca no município de Igarape-Açu, Pará.
Provedor de dados: 14
Autores: FERREIRA, C. A. P.; CARVALHO, R. de A.
bitstream/item/57474/1/CPATU-ComTec83.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Igarapé-Açu; Pará; Brasil; Cultural methods; Maize; Costs.; Arroz; Custo; Mandioca; Milho; Produtividade.; Pratica Cultural; Amazonia; Cassava; Rice; Yields.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375261

Estimativa do número de inserções de transgenes em milho por PCR quantitativo (qPCR).
Provedor de dados: 14
Autores: BARROS, B. de A.; GUIMARAES, C. T.; LANA, U. G. de P.; PÔSSA, K. F.; ANDRADE, L. C. S. S.; SILVA, V. L. da; LOPES, F. A.; CARNEIRO, A. A.; CARNEIRO, N. P.; MAGALHAES, J. V. de.
bitstream/item/52981/1/circ-164.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize.; Milho; Melhoramento genético vegetal; Plant breeding.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/905723

Estoques de carbono e nitrogênio do solo após 17 anos sob preparo convencional e plantio direto em dois sistemas de rotação de culturas em Cruz Alta, RS.
Provedor de dados: 14
Autores: JANTALIA, C. P.; PETRERE, C.; AITA, C.; GIACOMINI, S.; URQUIAGA, S.; ALVES, B. J. R.; BODDEY, R. M.
Descrição e caracterização da área experimental. Amostragem e preparo das amostras de solo. Cálculos do estoque de carbono e nitrogênio no perfil do solo sob os tratamentos. Estimativa da proporção de carbono do solo derivado da vegetação nativa original. Análise estatística. Fertilidade e densidade do solo na área sob vegetação nativa e sob os tratamentos de manejo do solo e rotação de culturas. Teores de carbono orgânico total e nitrogênio total do solo. Estoques de carbono e nitrogênio no solo sob diferentes tratamentos de preparo e rotação de culturas. Abundância natural de 13C no perfil do solo. Estimativa da proporção de carbono da matéria orgânica do solo derivada da vegetação nativa. O sistema plantio direto (PD), utilizado inicialmente para...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Ciclagem de carbono; Pasture; Green manure; Carbon turnover.; Adubação Verde; Manejo do Solo; Latossolo Vermelho; Pastagem; Sistema de Produção.; Soil management.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/623023

Estrategias campesinas generadas en el maíz (cultivo de subsistencia) y aplicadas en el cultivo comercial de la tuna [Opuntia ficus-indica (L.) Miller] en la comunidad de Santa Ursula Chiconquiac, Mpio. General Felipe Angeles, Puebla, México.
Provedor de dados: 32
Autores: Avila Rivera, María Guadalupe.
La población de Santa Úrsula Chiconquiac del Estado de Puebla, se origina en la época prehispánica, es de filiación nahua y los registros históricos mencionan que en sus tierras se cultivaba maíz (Zea maiz L.), chile (Capsicum sp.), frijol (Phaseolus sp.) y calabaza (Cucurbita sp.). Cultivos que se practican actualmente, los cuales si bien es cierto que satisfacen las necesidades básicas de alimentación no generan excedentes para cubrir otros gastos familiares, ya que son cultivos de subsistencia con precios bajos. Por lo que, los ursuleños optaron por el cultivo comercial de la tuna (Opuntia ficus-indica (L.) Miller), el cual está adaptado a las condiciones ecológicas y a que la comunidad se localiza en la “Región Sur” productora de tuna del estado de...
Palavras-chave: Estrategias campesinas Cultivo de subsistencia maíz Cultivo comercial de tuna Santa Ursula Chiconquiac; Puebla Peasant strategies Subsistence maize crop Commercial cultivation of prickly pear EDAR Estrategias para el Desarrollo Agrícola Regional Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1720

Estrategias de las familias campesinas en Pueblo Nuevo, Acambay, Estado de México.
Provedor de dados: 32
Autores: Magdaleno Hernández, Edgar.
Las familias campesinas trabajan buscando en primera instancia su autoabasto y complementan su ingreso con otras actividades. En este trabajo se analizan las estrategias; multi actividad y autoabasto a través de los resultados obtenidos mediante entrevistas y la aplicación de una encuesta a 35 jefes de familia de la comunidad de Pueblo Nuevo, ubicada en el municipio de Acambay en el estado de México. Se practica una agricultura tradicional, se fusiona el sistema de cultivo de maíz blanco (criollo) y el sistema de crianza de ganado menor (borregos, vacas, porcinos, aves). En la fertilización, predomina el uso de fertilizantes nitrogenados. También se utiliza estiércol del ganado o aves como complemento, debido a que es fuente de nutrientes y materia...
Palavras-chave: Autoabasto; Multiactividad; Agricultura tradicional; Desarrollo Rural; Maestría; Self-supply; Multi-activity; Traditional agriculture.
Ano: 2012
URL: http://hdl.handle.net/10521/1775

Estrategias para reducao dos efeitos do veranico em culturas de milho e soja, na regiao dos cerrados.
Provedor de dados: 14
Autores: CARVALHO, L. J. C. B. de; GOMIDE, R. L.; LUCHIARI JUNIOR, A.; RODRIGUES, G. C.
bitstream/item/99291/1/comtec-42.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cultivo; Maize; Cultivation; Brasil; Rainfall; Savanna.; Balanço Hídrico; Climatologia; Cerrado; Deficiência Hídrica; Estiagem; Glycine Max; Milho; Produção; Produtividade; Redução; Soja; Zea Mays.; Veranico; Corn; Soybeans.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549331

Estrutura de produção de malva no Nordeste paraense.
Provedor de dados: 14
Autores: HOMMA, A. K. O.
bitstream/item/33762/1/CPATU-CirTec8.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Sistema; Consorciacao; Rotacao; Tipificacao; Pará; Capitao-poco; Irituia; Ourem; Sao Domingos do Capim; Mallow; Production; Maize; Bean; Rotation; Economy; Tipification.; Algodão; Arroz; Economia; Feijão; Mandioca; Malva; Milho; Pequeno Produtor; Produção.; Cotton; Cassava; Intercropping; Small farms.; Rice.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376814

ESTs analysis in maize developing kernels exposed to single and combined water and heat stresses
Provedor de dados: 63
Autores: Andjelković,Violeta; Ignjatović-Micić,Dragana.
Molecular and metabolic response of plants to a combination of two abiotic stresses is unique and cannot be directly extrapolated from the response of plants to each of the stresses individually. cDNA macroarray has become a useful tool to analyze expression profiles and compare the similarities and differences of various expression patterns. A macroarray of approximately 2,500 maize (Zea mays L.) cDNAs was used for transcriptome profiling in response to single and simultaneous application of water and high temperature stress of maize developing kernels at 15 days after pollination. All stress treatments (water stress-WS, heat stress-HS and their combined application-CS) induced changes in expression of 106 transcripts with 54 up-regulated and 52...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Down-regulation; Macroarray; Up-regulation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000300013

Estudio de la dinámica de aprovechamiento del maíz en las unidades de producción familiar en el Valle de Puebla, México.
Provedor de dados: 32
Autores: Viveros Flores, Cresencia Emma.
El maíz en Puebla concentra el 62% de la superficie cultivada; tres características importantes de su producción son que el 70% se desarrolla bajo temporal, que el 80% se siembra con materiales criollos, y que su cultivo está a cargo fundamentalmente de unidades de producción familiar (UPF). Este panorama se reproduce en el Valle de Puebla. Investigaciones previas en dicha región avanzaron en la identificación de algunas características asociadas al empleo preferente de maíces criollos en la alimentación, pero no precisaron la dinámica de utilización del grano y la planta al interior de la UPF, ni su aporte económico o la medida en la cual satisface las necesidades de consumo de dicha UPF. Estos aspectos constituyeron el problema de investigación del...
Palavras-chave: Agricultura tradicional; Agricultura campesina; Zea mays L.; Traditional agriculture; Peasant agriculture; Doctorado; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/370

Estudio multiescalar del recurso hídrico como factor de cambio en distritos del noreste de Tamaulipas
Provedor de dados: 32
Autores: Gutiérrez Castorena, Edgar Vladimir.
A partir de 1994, la Tercera Unidad de Asistencia Técnica del Distrito de Riego No. 026,  región noreste del estado de Tamaulipas, fue modificado por un déficit de humedad colocando a  la región en una situación de alta vulnerabilidad social, económica, política, cultural y  agroecológica. Debido a la complejidad del problema se llevó a cabo una investigación  multiescalar desde, el nivel mega-macro hasta el microscópico empleando diferentes  metodologías: interpretación de imágenes de satélite, uso de sistemas de información geográfica,  creación de bases de datos (90,500 piezas), encuestas directas con productores, análisis físicos,  químicos, mineralógicos y micromorfológicos de suelos. Los objetivos que se plantearon fueron:  1) Evaluar el uso de la...
Tipo: Tesis
Palavras-chave: Patrón de cultivo; Maíz; Sorgo; SIG; Cambio de uso de suelo; Clasificación de Suelos; Suelos semi-áridos; Déficit de agua; Percepción remota; Doctorado; Edafología; Maize; Sorghum; GIS; Land use change; Environment adaptation; Crop patterns; Irrigation Districts; Remote sensing.
Ano: 2009
URL: http://hdl.handle.net/10521/1284

Estudos experimentais sôbre a origem do milho
Provedor de dados: 43
Autores: Brieger,F. G.
1) It may seem rather strange that, in spite of the efforts of a considerable number of scientists, the problem of the origin of indian corn or maize still has remained an open question. There are no fossil remains or archaeological relics except those which are quite identical with types still existing. (Fig. 1). The main difficulty in finding the wild ancestor- which may still exist - results from the fact that it has been somewhat difficult to decide what it should be like and also where to look for it. 2) There is no need to discuss the literature since an excellent review has recently been published by MANGELSDORF and REEVES (1939). It may be sufficient to state that there are basically two hypotheses, that of ST. HILAIRE (1829) who considered...
Tipo: Info:eu-repo/semantics/article
Ano: 1944
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761944000100011

Estudos sôbre a inflorescência de milho com referência especial aos problemas filogenéticos
Provedor de dados: 53
Autores: Brieger,F. G.
1) The present paper deals with variations in the structure of the inflorescences of the Maydeae Americanae, especially of the ear of Zea Mays, which came under observation during our genetical studies during the last 10 years. Care was tauken to include only such structures which were observed frequently and had in general an aspect which could not be described as a pathological abnormality, but rather as a reversion to a phylogenetically primitive type or as a new form. The aberrations may be summarized as follows: a) Individual flowers. Eeversion to the hermaphrodite state of the usually unisexual flowers in Maydeae were described. Such flowers are however already so well known that no details need to be given. b) Many flowered spikelets. The spikelet...
Tipo: Info:eu-repo/semantics/article
Ano: 1945
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051945001100001

Etablierung von Untersaaten zur Reduzierung des Unkrautdruckes im Mais-Bohnen-Gemengeanbau
Provedor de dados: 21
Autores: Fischer, Jenny; Böhm, Herwart.
Da eine mechanische Unkrautbekämpfung nach dem Auflaufen der Bohnen nur schwer möglich ist, haben wir untersucht, ob es möglich ist Untersaaten in Mais-Bohnen-Gemengen zu etablieren. Dazu wurden zwei Untersaatmischungen, sowohl in Mais-Reinsaat als auch in zwei Gemengevarianten mit Feuerbohnen (Phaseolus coccineus, cv. Preisgewinner) bzw. Stangenbohnen (Phaseolus vulgaris, cv. Tarbais) getestet. Als Kontrollvarianten wurden Parzellen ohne Untersaat geprüft. Die Untersaatmischungen bestanden aus Welschem Weidelgras (cv. Gersimi, Aussaatdichte: 15 kg ha-1), in Kombination mit Erdklee (cv. Seaton Park, Aussaatdichte: 30 kg ha-1) in US1 und Futterchicoree (cv. Puna II, Aussaatdichte 7,5 kg ha-1) in US2. Zum Zeitpunkt der Maisblüte (BBCH65) wurden der...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Crop combinations and interactions Weed management.
Ano: 2019
URL: http://orgprints.org/36203/1/Beitrag_276_final_a.pdf

Etiología y manejo de la mancha de asfalto (Phyllachora maydis Maubl.) del maíz en Guerrero, México
Provedor de dados: 115
Autores: Pereyda-Hernández,Juan; Hernández-Morales,Javier; Sandoval-Islas,J. Sergio; Aranda-Ocampo,Sergio; de León,Carlos; Gómez-Montiel,Noel.
La mancha de asfalto del maíz es importante en el trópico de México por su impacto en el rendimiento. Se detectaron los agentes causales Phyllachora maydis Maubl., Monographella maydis Müller &amp;amp; Samuels y Coniothyrium phyllachorae Maubl., en el Valle de Mochitlán y otros Municipios del Estado de Guerrero. La enfermedad causó pérdidas del 55.1 % de la producción. Ochenta y un híbridos y 25 variedades de polinización libre de maíz evaluadas en esta zona contra este complejo de fitopatógenos no escaparon a la infección; sin embargo, los híbridos H-513×CML47, HEIixH-H-513 y H-513×CM374 exhibieron 7.29, 7.35 y 7.95 % de severidad, y fueron los más tolerantes. H-513 fue consistente en sus atributos de tolerancia, y su progenie representó 77 % de los 22...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coniothyrium phyllachorae; Monographella maydis; Phyllachora maydis; Genetic and chemical control; Maize.
Ano: 2009
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952009000500006

Etnobotánica comparativa de plantas comestibles recolectadas en sistemas de agricultura tradicional de México y Zimbabwe
Provedor de dados: 32
Autores: Manduna, Idah Tichaidza.
La recolección de plantas comestibles es un componente importante en sistemas de  agricultura tradicional. Estas plantas forman parte de las dietas locales. El objetivo de esta  investigación fue comparar el conocimiento y uso de plantas comestibles recolectadas que  complementan la dieta basada en maíz en comunidades rurales, con el fin de identificar  patrones generales en dos poblaciones con condiciones similares, pero sin contactos directos  en el pasado. Se recopiló información en Santa Catarina Roatina y Villa Talea de Castro de  Oaxaca, México y Chipupuri y Maradzika de Honde Valley, Zimbabwe mediante entrevistas  grupales e individuales, diarios de alimentos y observación participante. También se  muestrearon los arvenses de cultivos de maíz para...
Tipo: Tesis
Palavras-chave: Conocimiento etnobotánico; Arvenses; Origen biogeográfica; Doctorado; Botánica; Doctorado; Botánica; Ethnobotanical knowledge; Weeds; Biogeographical origins.
Ano: 2008
URL: http://hdl.handle.net/10521/1521

Etnobotánica del chile quipín (Capsucum annuum var. Glabriusculum) en la sierra gorda y semidesierto de Querétaro
Provedor de dados: 32
Autores: Martínez Torres, Héctor Leonardo.
El chile silvestre, comúnmente denominado piquín (C. annuum var. glabriusculum (Dunal) Heiser &amp; Pickersgill) ha sido identificado como el progenitor y pariente silvestre de las formas domesticadas. En México las poblaciones naturales de este taxón se encuentran ampliamente distribuidas y son aprovechadas por los habitantes del medio rural, a través de la recolección. Las poblaciones silvestres también pueden ser la mejor reserva de germoplasma útil ya que conservan los procesos evolutivos naturales que se presentan en sus poblaciones. A pesar de ello se cuenta con poca información a nivel general sobre su diversidad y formas de utilización tradicional. Esta planta se encuentra presente en el estado de Querétaro en dos regiones, la Sierra Gorda y el...
Tipo: Tesis
Palavras-chave: Recurso fitogenético; Chile silvestre; Producto forestal no maderable; Recolección; Capsicum annuum var. Aviculare; Maestría; Botánica; Wild chili pepper; Plant genetic resources; Non-timber forest product; Collecting; Capsicum annuum var. Aviculare.
Ano: 2007
URL: http://hdl.handle.net/10521/1608

Etude sur la transmission des fluctuations et le calcul des prix de parité à l’importation: cas pratique du riz et du maïs au Sénégal
Provedor de dados: 31
Autores: Ndiaye,   Mouhamadou; Niang,   Moussa.
Calculation of maize and rice parity prices in Senegal.
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Senegal; Markets; Parity prices; Agricultural and Food Policy; Community/Rural/Urban Development; Food Security and Poverty; International Development; Marketing; Q11; Q18.
Ano: 2010
URL: http://purl.umn.edu/62166

Etude sur la transmission des fluctuations et les prix de parité du riz et du maïs au Mali
Provedor de dados: 31
Autores: Traore,   Pierre; Diarra,   Salifou Bakary.
Calculation of maize and rice parity prices in Mali.
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Mali; Food policy; Markets; Prices; Agricultural and Food Policy; Community/Rural/Urban Development; Food Security and Poverty; International Development; Marketing; Q11; Q18.
Ano: 2010
URL: http://purl.umn.edu/62165

Eucalyptus ESTs involved in the production of 9-cis epoxycarotenoid dioxygenase, a regulatory enzyme of abscisic acid production
Provedor de dados: 74
Autores: Guerrini,Iraê A.; Trigueiro,Rodrigo M.; Leite,Regina M.; Wilcken,Carlos F.; Velini,Edivaldo D.; Mori,Edson S.; Furtado,Edson L.; Marino,Celso L.; Maia,Ivan G.
Abscisic acid (ABA) regulates stress responses in plants, and genomic tools can help us to understand the mechanisms involved in that process. FAPESP, a Brazilian research foundation, in association with four private forestry companies, has established the FORESTs database (&lt;A HREF="https://forests.esalq.usp.br"&gt;https://forests.esalq.usp.br&lt;/A&gt;). A search was carried out in the Eucalyptus expressed sequence tag database to find ESTs involved with 9-cis epoxycarotenoid dioxygenase (NCED), the regulatory enzyme for ABA biosynthesis, using the basic local BLAST alignment tool. We found four clusters (EGEZLV2206B11.g, EGJMWD2252H08.g, EGBFRT3107F10.g, and EGEQFB1200H10.g), which represent similar sequences of the gene that produces NCED. Data...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Eucalyptus EST; Abscisic acid; Water deficit; Drought resistance; NCED.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400020

Euplectrus furnius parasitizing Spodoptera frugiperda in maize in Brazil
Provedor de dados: 65
Autores: Sturza,Vinícius Soares; Dequech,Sônia Thereza Bastos; Tavares,Marcelo Teixeira; Guths,Candice; Walker,Michel Pires; Bolzan,Anderson.
Brazil is among the world's biggest maize producers and fall armyworm, Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae), is the main insect pest on this crop in the country. Despite the importance of its natural enemies, there still is a lack of information about parasitoids species that attack this insect-pest, such as larval parasitoids. This research reports Euplectrus furnius Walker (Hymenoptera: Eulophidae) parasitizing S. fugiperda larvae on maize crop in Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Larval parasitoid; Fall armyworm; Zea mays L.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001100006

Evaluación agronómica e interacción genotipo-ambiente en poblaciones de maíz de la raza Jala.
Provedor de dados: 32
Autores: López Guzmán, Jesús Asunción.
La raza Jala de maíz (Zea mays L.) es una de las más importantes de México. Ésta ha sido cultivada durante siglos en el Valle de Jala, Nayarit, y su mazorca se reconoce mundialmente como la de mayor tamaño; no obstante, esta raza ha sufrido “erosión genética” grave que le ha provocado una reducción en longitud de mazorca y producción de grano. Para contribuir a su conservación y mejoramiento genético, en este trabajo se estudiaron su potencial productivo (RGp) y atributos agronómicos, en especial la longitud de mazorca (LMZ). Por otro lado, los productores citan con frecuencia la confianza que tienen en los maíces criollos por ser opciones resistentes y predecibles en su comportamiento agronómico, en comparación con las variedades “modernas” producto del...
Palavras-chave: Zea mays L.; Interacción genotipo por ambiente; Poblaciones; Raza Jala; Rendimiento; Longitud de mazorca; Biplot; Genotype x environment interaction; Populations; Jala race; Grain yield; Ear length; Genética; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2194

Evaluación de biofertilizantes y factores para su innovación con productores de maíz en San Felipe Teotlalcingo, Puebla.
Provedor de dados: 32
Autores: Zagoya Martínez, Joaquín.
El abuso de tecnologías en la agricultura convencional (fertilizantes químicos, herbicidas, insecticidas, fungicidas), ha provocado daños en el medio ambiente y los recursos naturales, generando crisis ecológica y social, afectando en mayor medida a los pequeños agricultores. El uso de fertilizantes sintéticos en la agricultura ha sido la fuente principal de nutrientes para las plantas, sin embargo es importante buscar alternativas más sustentables en la nutrición de cultivos. Una opción viable son los biofertilizantes. El presente trabajo se realizó en el municipio de San Felipe Teotlalcingo, estado de Puebla, donde se evaluó los rendimientos y costos de producción de los biofertilizantes de preparación local, aplicados al cultivo de maíz, así como los...
Palavras-chave: Abono líquido fermentado; Agricultura alternativa; Percepción; Zea mays; Alternative agriculture; Fermented liquid manure; Perception; Estrategias para el Desarrollo Agrícola Regional; EDAR; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2206

Evaluación de la degradación efectiva y el comportamiento productivo de ovinos de pelo alimentados con sacchamaiz.
Provedor de dados: 32
Autores: Godínez Juárez, Beatriz.
El objetivo de este trabajo fue el evaluar el efecto de inclusión de maíz (0, 10, 20, 30 y 40%) en alimentos a base de caña de azúcar fermentada en la degradación efectiva (DE) y el peso de ovinos de pelo corto. Las dietas, Saccharina, Saccharina +10, 20, 30, y 40% de maíz, fueron evaluadas. La DE e in situ de la material seca (MS) y la fibra detergente neutra (FDN) fueron evaluadas de acuerdo a un diseño completamente al azar con arreglo factorial. Se evaluó el consumo voluntario y la ganancia de peso en 24 ovinos (Kathadin x Pelibuey), de un peso promedio de 17 ±3 kg, con un arreglo completamente al azar. Con excepción de DE de MS y la tasa de degradación, el tratamiento al 10% presentó los niveles más altos de degradación in situ (MS=75.90%,...
Palavras-chave: Alimentación de ovinos; Degradación; Crecimiento animal; Ingestión voluntaria; Sheep feeding; Degradation; Animal growth; Voluntary intake; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2244

Evaluación de la interacción genotipo por práctica de labranza (G x T) del cultivo de trigo.
Provedor de dados: 32
Autores: Ponce Cruz, Ruy.
Esta investigación es parte de los esfuerzos del Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) para evaluar la interacción entre genotipo y práctica de labranza en cuanto a desarrollo de trigo y su rendimiento bajo diferentes niveles de estrés hídrico, con el propósito de optimizar el proceso de mejoramiento de trigo para distintos sistemas agronómicos.El experimento se realizó en el Campo Experimental Norman E. Borlaug (CENEB), localizado en la parte noroeste de México, en un suelo Chromic Haplotorrert (Hyposodic Vertisol, Calcaric, Chromic), bajo en materia orgánica (&lt; 1%), en condiciones áridas.Los tratamientos fueron: Camas Convencionales (CC) y Camas Permanentes (CP) y el régimen de riego, Completo (RC) y Reducido (RR). Para...
Palavras-chave: Interacción; Genotipo; Práctica de labranza; Porcentaje de cobertura; NDVI; Interaction; Genotype; Tillage practice; Percent cover; Hidrociencias; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2102

Evaluación de la sustentabilidad del agroecosistema maíz en la región de Huamantla, Tlaxcala.
Provedor de dados: 32
Autores: Sánchez Morales, Primo.
Los sistemas de producción agrícola a nivel mundial en los últimos dos y medio siglos han tenido cambios radicales. Para incrementar la productividad, gradualmente se han empleado insumos externos producidos por la industria (mecánica, química y biológica). Sin embargo, esos elementos en años recientes han deteriorado, contaminado y erosionado los recursos de los que depende la agricultura. El caso del maíz viene de un arraigo cultural muy fuerte, en México dependemos de este grano para la alimentación básica, y se torna de mucho interés conocer el estado de la sustentabilidad desde una perspectiva tridimensional (ámbitos social, ambiental y económico). Por eso, el objeto fue evaluar la sustentabilidad del agroecosistema maíz y conocer los aportes para la...
Palavras-chave: Agroecosistema; Evaluación de sustentabilidad; MESMIS; Zea mays; Agroecosystem; Sustainability evaluation; Estrategias para el Desarrollo Agrícola Regional; EDAR; Doctorado.
Ano: 2012
URL: http://hdl.handle.net/10521/1834

Evaluación de mezclas de harina de malanga y maíz para elaborar tortillas.
Provedor de dados: 32
Autores: Vázquez López, Leticia del Carmen.
Las tortillas son el principal producto alimenticio en México y forma parte de la dieta de todos los estratos sociales.Actualmente se puede elaborar tortillas a base de mezclas con otros alimentos; como por ejemplo: tortillas con frijol, amaranto, nopal o tritical. En algunos casos se usan otros ingredientes para agregarle valor, ya sea como alimento funcional o introducción de sabores. El objetivo de esta investigación fue estudiar las características físicas, químicas y sensoriales de tortillas elaboradas con mezclas de malanga y maíz para determinar en qué proporción la malanga puede ser sustituida sin afectar la calidad de la tortilla. Se elaboró harina de maíz y malanga. Las harinas de maíz y malanga fueron mezcladas para obtener los siguientes 5...
Palavras-chave: Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1894

Evaluación de una inversión irreversible en un escenario de incertidumbre, caso integración vertical de los trece ejidos S.P.R. de R. L.
Provedor de dados: 32
Autores: Salomón Guzmán, Hiram.
Los Trece Ejidos de Jocotitlán S.P.R. de R.L. es una empresa de productores de maíz de la región de Atlacomulco, Estado de México, que tienen el problema de incertidumbre en los precios de maíz y bajos ingresos por su actividad económica. Se plantea un crecimiento vertical con la incorporación de la actividad de acopio a través de un centro de acopio de los productores, además de tomar en sus manos la comercialización de maíz utilizando mecanismos como contratos de compra-venta, compra de coberturas de precios y créditos para sus socios, todo con la finalidad de reducir la incertidumbre y mejorar sus ingresos. Los objetivos son dos, a) Evaluar la inversión de la empresa Los Trece Ejidos con criterio de opciones reales en escenarios de incertidumbre...
Palavras-chave: Maíz; Evaluación de proyectos; Opciones reales; Proceso de Wiener; Corn; Project evaluation; Real options; Wiener process; Maestría; Economía.
Ano: 2010
URL: http://hdl.handle.net/10521/144

Evaluación de una inversión irreversible en un escenario de incertidumbre, caso integración vertical de los trece ejidos S.P.R. de R. L.
Provedor de dados: 32
Autores: Salomón Guzmán, Hiram.
Los Trece Ejidos de Jocotitlán S.P.R. de R.L. es una empresa de productores de maíz de la región de Atlacomulco, Estado de México, que tienen el problema de incertidumbre en los precios de maíz y bajos ingresos por su actividad económica. Se plantea un crecimiento vertical con la incorporación de la actividad de acopio a través de un centro de acopio de los productores, además de tomar en sus manos la comercialización de maíz utilizando mecanismos como contratos de compra-venta, compra de coberturas de precios y créditos para sus socios, todo con la finalidad de reducir la incertidumbre y mejorar sus ingresos. Los objetivos son dos, a) Evaluar la inversión de la empresa Los Trece Ejidos con criterio de opciones reales en escenarios de incertidumbre...
Palavras-chave: Maíz; Evaluación de proyectos; Opciones reales; Proceso de Wiener; Corn; Project evaluation; Real options; Wiener process; Maestría; Economía.
Ano: 2010
URL: http://hdl.handle.net/10521/144

Evaluación de variedades nativas de maíz expuestas a helada natural y artificial en Valles Altos de Puebla, México.
Provedor de dados: 32
Autores: Pérez de la Luz, Ricardo.
El maíz es el cultivo mas importante en México, por su superficie sembrada y por ser parte de la dieta básica de la población mexicana; sin embargo, el rendimiento por ha es bajo debido a factores adversos como las heladas. En México la superficie sembrada con maíz es de 8 millones de ha, de las cuales  el 1.2 % es siniestrada por helada, porcentaje que en Puebla es de 1.1 y de 1.6 en sus Valles Altos, lo cual afecta la producción de grano de maíz. A pesar de lo anterior, los estudios enfocados a un mejor entendimiento de los efectos de las heladas en la producción de maíz son escasos. El objetivo de este estudio fue evaluar el efecto de las heladas en el rendimiento de grano de maíz y en la germinación y vigor de la semilla expuesta a helada natural y...
Palavras-chave: Factores adversos; Maíz; Conductividad eléctrica; Germinación estándar; Adverse factors; Maize; Electrical conductivity; Standard germination; EDAR; Maestría; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/276

Evaluación de variedades pigmentadas de maíz para la producción de atole.
Provedor de dados: 32
Autores: Aparicio Martínez, Celestino.
El atole es la bebida más representativa y tradicional de México, comúnmente está elaborada a base de maíz pigmentado (Zea mays L.), que además de tener un color atractivo y un sabor diferente es más nutritivo que otras variedades de maíz. El objetivo de este trabajo fue caracterizar las propiedades del grano de maíz rojo, azul y blanco, así como sus respectivas harinas en los tratamientos tostado y sin tostar, y el testigo harina comercial (MAIZENA®). Los maíces pigmentados presentan pericarpio delgado y mayor contenido de endospermo suave, esta característica obtenida de acuerdo al índice de flotación, de 99.8% para maíces pigmentados, mientras que el maíz blanco presentó 93.65%; la densidad absoluta de la variedad rojo fue de 1.05 g/mL, la azul 1.12...
Palavras-chave: Zea mays L.; Propiedades funcionales de harinas; Atole; Functional properties flour; Agroindustria; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/2003

Evaluación del contenido de antocianinas en maíces de color cultivados en temporal y fertirrigación como una estrategia de desarrollo agrícola para la Región Oriente de Morelos.
Provedor de dados: 32
Autores: Broa Rojas, Elizabeth.
Con el propósito de cuantificar las antocianinas totales en maíces de color y caracterizar a los genotipos seleccionados para encontrar los más promisorios en cuanto al rendimiento de grano, se colectaron 40 maíces nativos de la Región Oriente del Estado de Morelos, de los cuales se seleccionaron 15 específicos y se evaluaron igual número de ellos bajo condiciones de temporal y fertirrigación en el campo experimental del Instituto Profesional de la Región Oriente (IPRO) en Xalostoc, Morelos durante el año 2011. El diseño experimental utilizado fue el de bloques completos al azar con 15 tratamientos y 3 repeticiones, la unidad experimental consistió en 4 surcos de 1 m de ancho y 6 m de largo. La separación entre matas fue de 0.3 m, depositando dos semillas;...
Palavras-chave: Antocianinas; Fertirrigación; Maíces nativos; Rendimiento de grano; Estrategias para el Desarrollo Agrícola Regional; EDAR; Maestría; Anthocyanins; Fertirrigation; Native maize; Grain Yield.
Ano: 2012
URL: http://hdl.handle.net/10521/1774

Evaluating influence of organic amendments and legume integration on soil chemical properties and crop performance in Central Kenya
Provedor de dados: 21
Autores: Ndukhu, Haggai Onyango.
Demand for organic foods, especially vegetables has increased tremendously due to reasons such as safety, environmental concerns, flavour and freshness, health benefits and nutritional value. In the current agricultural production environment, conventional farming methods pose the greatest risks in terms of reduced crop yields due to soil degradation. In the face of climate change and variability (CCV), field experiments are limited and without appropriate modelling techniques future crop production scenarios can’t be predicted leading to food insecurity. A survey and field experiment were done to assess crop productivity under organic based cropping systems and impact of CCV on soil nutrients and maize yields during the short and long rains seasons of...
Tipo: Thesis
Palavras-chave: Soil Crop health; Quality; Protection Environmental aspects.
Ano: 2015
URL: http://orgprints.org/33474/1/Haggai%20Ndhuku%20PhD%20Final%20Thesis.pdf

Evaluating the Impact of Biofortification: A Meta-analysis of Community-level Studies on Quality Protein Maize (QPM)
Provedor de dados: 31
Autores: Gunaratna,   Nilupa S.; De Groote,   Hugo; McCabe,   G.P.
Biofortification, or the genetic improvement of the nutritional quality of food crops, is a promising strategy to combat undernutrition, particularly among the rural poor in developing countries. However, traditional methods of impact assessment do not apply to biofortified crops as little or no yield increases are expected. Significant progress has been made to develop maize varieties with improved protein quality, collectively known as quality protein maize (QPM). Evidence for the impact of QPM at the community level, as demonstrated by randomized, controlled studies, was evaluated using meta-analysis. A new and generalizable effect size was proposed to quantify the impact of QPM on a key outcome, child growth. The results indicated that consumption of...
Tipo: Conference Paper or Presentation
Palavras-chave: Impact assessment; Biofortification; Meta-analysis; Crop Production/Industries; Food Security and Poverty.
Ano: 2008
URL: http://purl.umn.edu/44166

Evaluation of corn varieties for corn earworm (Heliothis armigera Hubner) resistance
Provedor de dados: 106
Autores: Amara Traisiri; Charas Kitbamroong; Samruay Prook-ngam.
1 table
Palavras-chave: Corn; Maize; Corn earworm; Heliothis armigera; ข้าวโพด; หนอนเจาะฝัก; พันธุ์ต้านทาน.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4375

Evaluation of corn yield response of corn varieties of different levels of downy mildew resistance with different planting times
Provedor de dados: 106
Autores: Nimitr Vorasoot.
1 table
Palavras-chave: Corn; Maize; Varieties; Downy mildew; Planting time; Disease resistance; Variety trials; Yields; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3814

Evaluation of downy mildew reaction on different germplasm of corn in 1988
Provedor de dados: 106
Autores: Prachum Jutawantana; Udom Pupipat; Chamaiporn Kittithamkul; Jiranan Yamsoongnern.
3 tables
Palavras-chave: Corn; Maize; Downy mildew; Germplasm; ข้าวโพด; โรคราน้ำค้าง; พันธุ์; ความต้านทานโรค.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4300

Evaluation of downy mildew reaction on different germplasm of corn in 1989
Provedor de dados: 106
Autores: Prachum Jutawantana; Udom Pupipat; Chamaiporn Kittithamkul.
3 tables
Palavras-chave: Corn; Maize; Downy mildew; Corn germplasm; ข้าวโพด; โรคราน้ำค้าง; พันธุ์.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4366

EVALUATION OF EFFECTIVE MICROORGANISMS (EM) TECHNOLOGY IN  MAIZE (Zea mays L.) GROWTH, DEVELOPMENT AND YIELD IN MOROGORO TANZANIA
Provedor de dados: 21
Autores: SAIDIA, PAUL SABAS; CHILAGANE, DAUDI AMOS; WOSTRY, ALEXANDER; MARO, JANET FARES.
The field experiment was conducted at Tushikamane Centre  Kilakala, Morogoro Tanzania to investigate the effect of EM technology on maize (Zea mays L.) growth, development and yield. Maize is a major cereal consumed; over 80% of population depends on maize for food in Tanzania. Low soil fertility, insect pests and diseases are among the primary constraints in maize production. This is due to continuous cultivation without fertilizing the soil, poor and lack of proper measures to control pest and diseases. Most farmers in both rural and urban areas of Tanzania are not aware with the use of organic fertilizers especially the EM (Effective Microorganism) technology in agriculture to increase crop yield without the use of agricultural chemicals or artificial...
Tipo: Report
Palavras-chave: Composting and manuring Recycling; Balancing and resource management Crop health; Quality; Protection Africa Farm nutrient management.
Ano: 2010
URL: http://orgprints.org/19472/1/EFFECTIVE_MICROORGANISMS_IN_AGRIC_Saidia_et_al_2010.pdf

EVALUATION OF FIVE EMERGING BIOTECHNOLOGIES FOR MAIZE
Provedor de dados: 31
Autores: Menz,   Kenneth M.; Neumeyer,   Catherine F.
Scientists were surveyed as part of as assessment of five emerging biotechnologies which are potentially applicable to commercial U.S. maize production by the year 2000. The largest gains expected by scientists were from plant growth regulators, followed by photosynthetic enhancement, cell or tissue culture and biological nitrogen fixation.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1981
URL: http://purl.umn.edu/14120

Evaluation of grain sorghum hybrids for aluminum tolerance in nutrient solution
Provedor de dados: 1
Autores: Menezes, Cicero Beserra de; Lima, Geisiane Matos; Marucci, Rosangela Cristina; Bernardino, Karine Costa; Santos, Crislene Vieira dos; Julio, Marcos Paulo Mingote; Schaffert, Robert Eugene.
 Sorghum (Sorghum bicolor L. Moench) is one of the most important cereal crops in the world. In Brazil, the acreage of grain sorghum during off-season is quite expansive. Most of this area is the Cerrado, a Brazilian biome that is similar to a Savannah and is characterized by high acidity and soluble aluminum at toxic levels for plants. The aluminum acts as a limiting factor in achieving high yields. The purpose of this work was to phenotype sorghum hybrids for aluminum tolerance. Eighteen hybrids were evaluated in a nutrient solution containing {0} or {27} µM Al3+. The work was carried out in a growth chamber at the Embrapa Maize and Sorghum, from April 4 to May 30, 2014. The lines ATF 13B (susceptible) and ATF 14B (tolerant) were used as check cultivars....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum bicolor; Abiotic stress; Soil acidity; Plant breeding.; Melhoramento Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35304

Evaluation of grain sorghum hybrids for aluminum tolerance in nutrient solution
Provedor de dados: 1
Autores: Menezes, Cicero Beserra de; Lima, Geisiane Matos; Marucci, Rosangela Cristina; Bernardino, Karine Costa; Santos, Crislene Vieira dos; Julio, Marcos Paulo Mingote; Schaffert, Robert Eugene.
 Sorghum (Sorghum bicolor L. Moench) is one of the most important cereal crops in the world. In Brazil, the acreage of grain sorghum during off-season is quite expansive. Most of this area is the Cerrado, a Brazilian biome that is similar to a Savannah and is characterized by high acidity and soluble aluminum at toxic levels for plants. The aluminum acts as a limiting factor in achieving high yields. The purpose of this work was to phenotype sorghum hybrids for aluminum tolerance. Eighteen hybrids were evaluated in a nutrient solution containing {0} or {27} µM Al3+. The work was carried out in a growth chamber at the Embrapa Maize and Sorghum, from April 4 to May 30, 2014. The lines ATF 13B (susceptible) and ATF 14B (tolerant) were used as check cultivars....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.05-9 Sorghum bicolor; Abiotic stress; Soil acidity; Plant breeding. Melhoramento Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35304

Evaluation of maize and hemp cultivars as bioenergy crop
Provedor de dados: 21
Autores: Santanen, Arja; Kenedy, Epie; Mäkelä, Pirjo; Stoddard, Frederick.
We are cultivating annual and perennial crops as monoculture and as mixed culture to investigate plant biomass use for production of renewable energy sources in northern latitudes.    We have grown different hemp (Cannabis sativa L.) and bioenergy maize (Zea mays L.) cultivars in 2007-2009 at Viikki Experimental Farm, University of Helsinki.
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop husbandry.
Ano: 2010
URL: http://orgprints.org/17955/1/sympjo3.pdf

Evaluation of maize top crosses under two nitrogen levels
Provedor de dados: 64
Autores: Guedes,Fernando Lisboa; Souza,João Cândido de; Costa,Emiliano Fernandes Nassau; Reis,Matheus Costa dos; Cardoso,Gustavo Andrade; Ematné,Hugo Junqueira.
Maize crops in Brazil have a wide diversity of management systems. There is a large contingent of family agriculture, which uses little or no agricultural inputs, compared to the rural enterprise which uses the most modern production systems. This difference in the management systems is particularly noticeable in relation to consumption of fertilizers, especially nitrogenous ones. Therefore it is necessary to obtain plants with efficient nitrogen (N) use that also respond to applied nitrogen. Thus, the aim of the study was to evaluate the performance of S0:1 progenies, in top crosses, under two nitrogen levels and select the best ones based on responsiveness and efficiency. Sixty seven S0:1 progenies from populations of single cross hybrids were crossed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic breeding; Zea mays; S0:1 progenies; Tester; Abiotic stress.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600011

Evaluation of morphological characteristics in Venezuelan maize (Zea mays L.) genotypes under drought stress
Provedor de dados: 63
Autores: Camacho,R.G.; Caraballo,D.F.
A greenhouse experiment was carried out to evaluate the responses among 10 maize (Zea mays L.) genotypes under drought stress. Seeds were planted in washed sand in plastic pots. The research was established in a completely random design with ten treatments and three replicate pots. The plants were harvested four weeks after sowning, and leaf area per plant (LA), root volume (RV), longest root length (LRL), plant height (PH), fresh (RFW) and dry weight (ROW) of roots, shoot dry weight (SOW), RDW/SDW ratio, and total dry matter production (TDM) were determined. Significant varietal differences for all characters were found, except for LRL. The data obtained allowed to identify Cargill-163 as a poor genotype at low water supply. Danac-3006, FM-6,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Leaf area; Root volume; Root length; Plant height; Root weight; Shoot weight; Total dry matter; Drought resistance.
Ano: 1994
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000300012

Evaluation of nutritional characteristics of corn stored in metallic silos
Provedor de dados: 111
Autores: Adekola, Kehinde Adedeji; Okolo, Callistus A.; A. Adekola, Kehinde.
This study assessed the nutritional quality attributes of maize (Zea mays) stored in metallic silos for a period of eight months in the humid tropics of Nigeria. The nutritional properties (NP) evaluated are percentage ash content (AC), crude fibre (CF), crude protein (CP), carbohydrate content (CHO), fat content (FC), and energy value (EV). The initial or control values were compared with the values obtained during storage. Statistical package for social sciences (SPSS 20) was used to determine the significant levels of data while the Multiple Analysis of Variance (MANOVA) and Duncan’s multivariate test were used to determine the trend of deterioration (P&lt;0.05) for all the values. The minimum and maximum average temperatures during storage were 29oC in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Silo; Corn bulk; Storage; Nutritional value.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3522

Evaluation of Organic and Inorganic Mulching as an Integrated Weed Management Strategy in Maize Under Rainfed Conditions
Provedor de dados: 87
Autores: MEHMOOD,T.; KHAN,S.U.; QAYYUM,A.; GURMANI,A.R.; AHMED,W.; LIAQUAT,M.; FARID,A.
ABSTRACT: Weeds affect crop growth, health and yield by competing for resources, and they serve as refuge for insect pests. Mulches of different materials have been found to control weeds and insect pests. A field study was conducted at the village of Mang, Haripur, Khyber Pakhtunkhwa, Pakistan, to explore the effect of various mulch materials on weed suppression in maize fields under rain-fed conditions in 2013. Eight mulch materials treatments were used: control (no mulching), wheat straw mulch, dry leaves of eucalyptus, rice straw mulch, grass clippings, living mulch (soybean crop), black plastic mulch and the herbicide Primextra were investigated under a randomized complete block design with four replications. Statistical analysis of data showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Mulch materials; Net benefits; Weed density; Weed biomass.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100347

Evaluation of resistance in wheat against Rhopalosiphumpadi (L.) (Homoptera:Aphididae) Under laboratory Conditions
Provedor de dados: 17
Autores: Naheed Akhtar; Noreen Moin; Ghulam Jilani; Ata  U. Mohsin; Shaheena  Yasmin; Afzala Afzala; Munir Goraya; Atif A. Baig.
Aims and introduction&amp;#xd;&amp;#xa;All over the world aphids are pests of economic importance, affecting all varieties of plants like cereal crops, vegetables, ornamental plants and fruits. Aphids damage plants either directly or indirectly. Aphids are one of the major agricultural pests. There are only a few plants that are not susceptible to infestation by this destructive pest. They cause direct damage by sucking the sap of leaves, blocking photosynthesis which results in leaf distortion, gall production, discoloration, stunting, leaf curling, wilting, twisting and premature leaf falls. They are directly involved in transmission of plant viruses and indirectly by depositing honey dew that reduces photosynthetic activity and induces sooty mold...
Tipo: Presentation
Palavras-chave: Plant Biology.
Ano: 2011
URL: http://precedings.nature.com/documents/5947/version/1

Evaluation of Resource Management Options for Smallholder Farms Using an Integrated Modelling Approach
Provedor de dados: 31
Autores: Zingore,   Shamie; Gonzalez-Estrada,   E.; Delve,   Robert J.; Dimes,   J.P.; Herrero,   Mario; Murwira,   H.K.; Giller,   Ken E.
Farm-level analysis of trade-offs between soil fertility management alternatives is required to improve understanding of complex biophysical and socio-economic factors influencing decision making in smallholder farming systems and to identify opportunities for improving resource use efficiency. A farm characterization tool (IMPACT) linked to a generic optimization model (Household) was used to evaluate resource use on farms in contrasting wealth categories. The Household model optimized the net cash income for the farms (accounting for all on-farm and off-farm income, costs of production and expenditure for the households). Alternatives for management of nutrient resource were simulated using other models; APSIM for the crop production and RUMINANT for the...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/25697

Evaluation of strip intercropping concept with grass-clover and maize strips to produce biomass for bioenergy
Provedor de dados: 21
Autores: Hauggaard-Nielsen, Henrik; Johansen, Anders; Carter, Mette S.; Ambus, Per; Jensen, Erik Steen.
To enhance integrity of organic farming it is important not only to deliver high quality food products to a growing market but also to include strategies to reduce the reliance on fossil fuels and decrease total greenhouse gas emissions. In this context, the increased use of perennials within traditionally more annual-based rotations may gain significant importance. The objective of this study was to determine the effect of a strip cropping strategy combining intercropping of a grass-clover based perennial forage crop mixture (soil fertility building (SFB) crop) and maize in strips on the biomass productivity per land area and to determine interactions between strip border rows and associated mechanisms responsible for a potentially improved resource use...
Tipo: Journal paper
Palavras-chave: "Organics" in general Crop combinations and interactions Composting and manuring Recycling; Balancing and resource management Farm nutrient management.
Ano: 2011
URL: http://orgprints.org/19008/4/19008.pdf

Evaluation of the Aspergillus flavus resistance of open pollinated corn
Provedor de dados: 106
Autores: Udom Pupipat; Prachum Jutawantana; Chamaiporn Kittithamkul; Duanrat Choludomkul; Jiranan Yamsoongnern.
1 table
Palavras-chave: Corn; Maize; Open pollinated variety; Fungi; Aspergillus flavus; ข้าวโพด; พันธุ์ผสมเปิด; พันธุ์ต้านทาน; แอสเปอร์จิลลัส.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4301

Evaluation of the charcoal stalk rot resistance cause by Macrophomina phaseolina in corn
Provedor de dados: 106
Autores: Prachum Jutawantana; Udom Pupipat; Jiranan Yamsoongnern.
1 table
Palavras-chave: Corn; Maize; Diseases; Charcoal stalk rot; Macrophomina phaseolina; Varieties; Disease resistance; ข้าวโพด; พันธุ์; โรคลำต้นเน่า; มาโครโฟมินา; ความต้านทานโรค.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4302

Evaluation of the genetic diversity among maize lines (Zea mays L.) by DNA fingerprinting analysis
Provedor de dados: 65
Autores: Echeverrigaray,Sergio; Delamare,Ana Paula Longaray; Tosello,Geraldo; Gal,Orit; Hillel,Jossi; Lavi,Uri.
Informativo DNA fingerprint profiles of eight homozygotic maize lines were obtained by the electrophoretic separation of DNA restriction fragments and the ir hybridization with the minisatellite probe R18.1. The analysis of the bandsharing frequencies allowed to identify all the lines and to estimate the genetic distances between them. The relationship obtained by DNA fingerprinting analysis of the eight inbreed lines was highly consistem with the ir genetical origin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Molecular identification; Genetic distances; Zea mays.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781996000300028

Evaluation of viability of Aspergillus flavus and aflatoxins degradation in irradiated samples of maize
Provedor de dados: 58
Autores: Aquino,Simone; Ferreira,Fabiane; Ribeiro,Deise Helena Baggio; Corrêa,Benedito; Greiner,Ralf; Villavicencio,Anna Lucia Casañas Haasis.
One of the currently most important fungi in stored grains is Aspergillus flavus, which produce aflatoxins. This fungus can grow on diverse substrates and represents a serious public health and animal nutritional problem. Therefore, the study of techniques that can be applied to the control of aflatoxins is of great importance. The objective of the present study was to determine the effects of gamma radiation on the growth of Aspergillus flavus Link and on degradation of aflatoxin B1 and B2 (AFB1 and AFB2) at a relative humidity of 97 99% and a water activity (Aw) of 0.88-0.94. Samples of corn grains were irradiated using a cobalt 60 source emitting gamma rays at doses of 2, 5 and 10 kGy. Irradiation was found to be effective in reducing the number...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gamma radiation; Aspergillus flavus; Fluorescent viability test; Water activity; Maize.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000400009

Evapotranspiração em plantio de milho no cerrado.
Provedor de dados: 14
Autores: MEIRELLES, M. L.; FARIAS, S. E. M. de; GUERRA, A. F.; FRANCO, A. C.
RESUMO: O milho (Zea mays L.) é uma cultura de destaque no Cerrado e a disponibilidade de água é considerada um fator ambiental determinante na produtividade dessa cultura. Este trabalho teve como objetivo fornecer as taxas de evapotranspiração, relacionando-as com fatores ambientais em dias sem precipitação durante a estação chuvosa, de um plantio de millho irrigado localizado em Planaltina-DF, na latitude 15º35' e altitude de 1007 m. A cultura apresentava no estágio de maturação com índice de área foliar de 4,5. Foram quantificadas as densidades dos fluxos dos principais componentes do balanço de energia: saldo de radiação (Rn), calor sensível do solo (G) e os fluxos turbulentos de calor sensível (H) e latente (LE). Rn e G foram medidas por aparelhos...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Método de correlação de turbilhões; Maize; Eddy correlation method.; Cerrado; Evapotranspiração; Milho; Transpiração Vegetal; Zea Mays.; Evapotranspiration; Transpiration.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568109

Evapotranspiration mapping of commercial corn fields in Brazil using SAFER algorithm
Provedor de dados: 63
Autores: Venancio,Luan Peroni; Mantovani,Everardo Chartuni; Amaral,Cibele Hummel do; Neale,Christopher Michael Usher; Filgueiras,Roberto; Gonçalves,Ivo Zution; Cunha,Fernando França da.
ABSTRACT SAFER (Simple Algorithm for Evapotranspiration Retrieving) is a relatively new algorithm applied successfully to estimate actual crop evapotranspiration (ET) at different spatial scales of different crops in Brazil. However, its use for monitoring irrigated crops is scarce and needs further investigation. This study assessed the performance of SAFER to estimate ET of irrigated corn in a Brazilian semiarid region. The study was conducted in São Desidério, Bahia State, Brazil, in corn-cropped areas in no-tillage systems and irrigated by central pivots. SAFER algorithm with original regression coefficients (a = 1.8 and b = –0.008) was initially tested during the growing seasons of 2014, 2015, and 2016. SAFER performed very poorly for estimating corn...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Landsat; Water consumption; Maize; Remote sensing.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000400102

Even-sowing pattern strategies for a low-input organic system in forage maize
Provedor de dados: 111
Autores: Blas Morente, Alejandro; Barreiro Elorza, Pilar; Hernández Díaz-Ambrona, Carlos Gregorio; Dias Da Costa, Gabriel; Griepentrog, Hans Wermer.
The objective of this study was to verify the effectiveness of new patterns of sowing and to achieve a low-input organic system in two different environments (northern and southern Europe).  The study was motivated by the hypothesis that more even sowing patterns (triangular and square) would significantly enhance the growth and yield of forage maize under widely varying conditions, compared with traditional mechanised rectangular seed patterns.  An experiment was conducted in Madrid and duplicated in Copenhagen during 2010.  A random block design was used with a 2 × 2 factorial arrangement based on two seed-sowing patterns: traditional (rectangular) and new (even) and two weed-management conditions (herbicide use and a low-input system).  In both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: (Agronomy; Plant science; Machinery; Environment) weed-control strategies  alternative seed patterns  precision agriculture  environmental management.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2442

Evidence of nitrogen and potassium losses in soil columns cultivated with maize under salt stress
Provedor de dados: 91
Autores: Lacerda,Claudivan F. de; Ferreira,Jorge F. da S.; Suarez,Donald L.; Freitas,Emanuel D.; Liu,Xuan; Ribeiro,Aureliano de A.
ABSTRACT The aim of this study was to evaluate the accumulation of salts in the soil from irrigation water and of N and K from fertilization. The experiment was conducted in PVC columns (20 cm in diameter and 100 cm in height), filled with non-saline soil, and cultivated with maize. A completely randomized block design in a 4 x 4 factorial was used, with four levels of salinity (0.5, 2.5, 5.0 and 7.5 dS m-1), four N rates, and five replicates. Nitrogen was applied as urea and potassium nitrate at the following rates: N1: N recommendation for maize (2.6 g column-1); N2: 0.3 times (0.78 g column-1) the recommended N1 dose; N3 and N4 with N based on N1 and N2 doses, respectively, reduced proportionally based on the evapotranspiration reduction caused by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salinity; Nitrate; Nutrients leaching.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000800553

Evidence of non-linear price transmission between maize markets in Mexico and the US
Provedor de dados: 31
Autores: Araujo-Enciso,   Sergio Rene.
The present work provides evidence that non linear co-integration between Mexico and the US maize prices exists, at country and regional level. The models suggest that Mexican prices adjust at changes in US prices. Despite asymmetry was statistically rejected, it is likely that it might occur for thriving parameters different that zero in the error correction term. The results suggest on which way the research might be improved in order to assess such co-integration relationship accurately.
Tipo: Conference Paper or Presentation
Palavras-chave: Co-integration; Asymmetric price transmission; Vector error correction model; Error      correction term; Loading parameter; Mexico; US; Maize; Agricultural and Food Policy; Food Security and Poverty; Research Methods/ Statistical Methods; C32; Q11; Q13.
Ano: 2009
URL: http://purl.umn.edu/51366

Evolucao agropecuaria da regiao nuclear dos cerrados 1970-1980.
Provedor de dados: 14
Autores: SANTOS, N. A. dos; AGUIAR, J. L. P. de.
O desenvolvimento economico do pais no decenio de 1970 a 1980, a melhoria da renda "per capita", o crescimento populacional e o aumento das exportacoes foram alguns dos fatores que determinaram a crescente producao de alimentos. Esse incremento na disponibilidade de produtos agricolas, decidiu-se a epoca, teria que ser feito via aumento da produtividade nas areas agricolas tradicionais e da abertura de novas areas de producao. A regiao dos cerrados, com 238,6 milhoes de hectares, apresenta-se com excelente potencial para a segunda opcao. Dispoe de razoavel infra-estrutura viaria e esta proxima dos grandes centros consumidores. Estes centros recebem, constantemente, significativo fluxo migratorio rural-rural, oriundo, sobretudo, do sul do Pais e dispoe de...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Desenvolvimento regional; Brasil; Regional development; Maize; Wheats.; Algodão; Bovino; Arroz; Cerrado; Feijão; Glycine Max; Manihot Esculenta; Mandioca; Milho; Oryza Sativa; Phaseolus Vulgaris; População Urbana; População Rural; Soja; Trigo; Zea Mays.; Gossypium; Brazil; Cassava; Cattle; Cotton; Soybeans; Urban population.; Rice; Rural population.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/547618

EVOLUÇÃO RECENTE DO MERCADO DE TRABALHO DA CANA-DE-AÇÚCAR NO BRASIL (1995-2006)
Provedor de dados: 31
Autores: Toneto Junior,   Rudinei; Liboni,   Lara Bartocci.
The recent expansion of the sugar and ethanol industries has raised some concerns regarding a number of issues. One major concern is with the quality of employment, the level of remuneration, the presence of child labor, the low qualification of the workers, informality and the high presence of temporary workers, among others. The objective of this study is to analyze the main employment characteristics in this sector to establish whether, in fact, its expansion will cause a deterioration of employment quality in the country. The work is based on information obtained from government databases (RAIS and PNAD). In the case of agricultural activities, the sugar cane labor market is compared to that of other cultures: soybean, maize, rice, meat, etc. And in...
Tipo: Journal Article
Palavras-chave: Employment; Sugar and ethanol industry; Perspectives.; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2008
URL: http://purl.umn.edu/61746

Evolution of Kenya's Maize Marketing Systems in the Post-liberalization Era
Provedor de dados: 31
Autores: Nyoro,   James K.; Kiiru,   M.W.; Jayne,   Thomas S.
The objectives of this paper are to: (1) identify the pattern of private sector investment in the maize marketing system since the reforms were initiated and evaluate the extent of private sector response to the reforms; (2) assess how maize prices and marketing margins have changed in response to the market reforms; (3) identify market-oriented mechanisms that have evolved in the current environment to reduce vulnerability of farmers, traders and consumers to price and expenditure instability; and (4) identify strategies that the government and private sector could implement to effectively promote the development of the evolving market oriented food systems.
Tipo: Working or Discussion Paper
Palavras-chave: Food Security; Food Policy; Kenya; Maize; Crop Production/Industries; Marketing.
Ano: 1999
URL: http://purl.umn.edu/55148

Evolution of Ryegrass Seed Banks Depending on Soil Tillage and Crops
Provedor de dados: 87
Autores: Galvan,J.; Rizzardi,M.A.; Peruzzo,S.T.; Ovejero,R.F.
The seed bank is characterized by the amount of seeds and other viable reproductive structures in the soil and it is changed by the input and output of seeds, being classified by its permanence in the soil as transient or permanent. The tillage and crops used decisively influence this dynamic and more disturbed areas tend to have richer seed banks. The purpose of this study was to test different soil tillage and crop systems, aiming to reduce or eliminate the ryegrass in the area. The experiment was conducted from 2010 to 2012. In the first year, the effect of chemical tillage was assessed, compared to the area without tillage. From the second year on, in the area that received chemical tillage, the second experiment was installed, where it was assessed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seed dormancy; Chiseling; Seeds viability; Weeds.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000200183

Evolution récente de la végétation intertidale du Delta de l'Eyre
Provedor de dados: 5
Autores: Labourg, Pierre Jean; Soriano-sierra, Eduardo-jean; Auby, Isabelle.
Maritime salt-marshes of the Eyre's delta located in Arcachon Bay (South-West Atlantic coast of France) were studied following to a recent work of Soriano-Sierra (1992). In the se tidal areas salt marshes develop at the top of mud-flats covered by Zostera noltii beds, and in the vicinity of fish ponds who are lagoonal impoundments of the 18th century. Along the Eyre's estuary where salinity is reduced by seepage of fresh water from the land, Spartina maritima and other halophilic plants tend to be replaced by a taU marsh of Phragmites communis, Scirpus maritimus and Juncus gerardii. The number of species or species richness is varying: S = 21 in the area l ("La Boucle") S = 26 ("Malprat") and S = 24 ("Comprian"). Rare species are present like Spartina...
Tipo: Text
Palavras-chave: Végétation; Zone intertidale; Delta; Vegetation; Delta; Schorre.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00152/26284/24367.pdf

Evolutionary relationships in the genus Zea: analysis of repetitive sequences used as cytological FISH and GISH markers
Provedor de dados: 74
Autores: Poggio,Lidia; Confalonieri,Viviana; Comas,Cecilia; Gonzalez,Graciela; Naranjo,Carlos A.
The present study is a revision of our work on evolutionary cytogenetics of the genus Zea, including several new experiments which give a deeper insight into the nature of the DNA sequences involved in telomeric regions of Zea luxurians. These new experiments, based on the Southern blotting technique and in situ hybridization, have demonstrated the following: 1) in situ hybridization (FISH) demonstrated the presence of the 180-bp repeat maize-knob-repeat-sequence in DAPI-positive terminal heterochromatic blocks of Z. luxurians (ZL-THB region); 2) Southern blot analysis confirmed that the 180-bp repeat present in maize is also present in Z. diploperennis, Z. luxurians and Tripsacum dactyloides, but not in Z. perennis; 3) another sequence with targeted sites...
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400048

Exchange Rate Sensitivity of Mexican Maize Imports from the United States
Provedor de dados: 31
Autores: Sarker,   Rakhal; Jaramillo-Villanueva,   Jose Luis.
Since the implementation of NAFTA in 1994 agri-food trade between Mexico and the United States grew substantially. While some analysts argue that NAFTA has contributed the most, others have emphasized the role played by exchange rate in this process. An attempt is made in this paper to address this issue by determining the extent to which NAFTA, expansion of the livestock sector, exchange rate and exchange rate variability have contributed to the expansion of Mexican maize imports from the United States from January 1989 to December 2004.
Tipo: Conference Paper or Presentation
Palavras-chave: Maize trade; Exchange rate; Volatility of exchange rate; Livestock inventory; Cointegration analysis; Error-correction model; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/9864

Experiment on foundation seed production on corn and sorghum
Provedor de dados: 106
Autores: Rachain Thiraporn; Somchai Lim-aroon; Thomya Thongluang.
5 tables
Palavras-chave: Corn; Maize; Sorghum; Seed production; Foundation seed; Hybrid seed; Rainfed condition; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; เมล็ดพันธุ์หลัก.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4363

Experimental data confirm the importance of appropriate selection environments for breeding maize adapted to organic farming systems
Provedor de dados: 21
Autores: Messmer, Monika; Burger, Henriette; Schmidt, Walter; Geiger, Hartwig H.
Organic farming systems, characterized by special attention to soil fertility, recycling techniques and low external inputs, gained increased significance in recent years. As a consequence, there is a growing demand for varieties adapted to organic and/or low input farming. In several studies modern varieties as well as landraces have been tested for their suitability for organic farming (OF), whereas special breeding programs aiming at genotypes optimized for this farming system are scarce. Comparing the testcross performance of unselected recombinant inbred lines derived from the widely used US hybrid B73 x Mo17 under conventional (CF) and organic farming systems, Lorenzana and Bernardo (2008) concluded that high yielding maize hybrids for OF can be...
Tipo: Conference paper, poster, etc.
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2009
URL: http://orgprints.org/19993/1/IFOAM_Messmer_paper__13_05_2009_NEW.pdf

Experimental evaluation of the performance of a wireless sensor network in agricultural environments
Provedor de dados: 70
Autores: Roccia,Clerivaldo; Teruel,Bárbara; Alves,Elaine C. de S.; Arnold,Francisco; Bravo-Roger,Leonardo; Moretti,Angelo; Gonçalves,Marcos S.
The aim of this study was to perform an experimental study to evaluate the proper operation distance between the nodes of a wireless sensor network available on the market for different agricultural crops (maize, physic nut, eucalyptus). The experimental data of the network performance offers to farmers and researchers information that might be useful to the sizing and project of the wireless sensor networks in similar situations to those studied. The evaluation showed that the separation of the nodes depends on the type of culture and it is a critical factor to ensure the feasibility of using WSN. In the configuration used, sending packets every 2 seconds, the battery life was about four days. Therefore, the autonomy may be increased with a longer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize (Zea mays L); Physic nut (Jatropha curcas); Eucalyptus (Eucalyptus grandis); Precision agriculture; Zigbee technology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000600018

Experimental squash kabocha produtivity grown in intercropping and monocrop
Provedor de dados: 22
Autores: Santos, Lucas Jorge dos; Gléria, Alexandra Almeida; Custódio, Aldo Max; Paim, Tiago do Prado; Santos, Leonardo de Castro; Alves, Estenio Moreira.
Evaluated the productivity of experimental squash kabocha "HC02 IF Goiano" intercropped with different green manures and annual crops. The experimental design was randomized blocks with eight treatments and three replications. The treatments were: (1) Squash hybrid HC02 IFGoiano (monocrop); (2) Squash kabocha HC02 IFGoiano intercropped with maize cv. "BM 3061"; (3) Squash kabocha HC02 IFGoiano intercropped with sunflower cv. "BRS 321"; (4) Squash kabocha HC02 IF Goiano intercropped with peanut cv. "common"; (5) Squash kabocha HC02 IF Goiano intercropped with pigeon pea dwarf cv. "IAPAR 43"; (6) Squash kabocha HC02 IF Goiano intercropped with pigeon pea shrub cv. "Super N"; (7) Squash kabocha HC02 IF Goiano intercropped with Crotalaria spectabilis cv....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adubação verde; Amendoim; C. spectabilis; Milho; Girassol.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/15246

Experimentation on consumptive water use for corn and sorghum
Provedor de dados: 106
Autores: Manut Roengchai; Sajee Charoenying.
3 tables
Palavras-chave: Corn; Maize; Sorghum; Consumptive water use; Evapotranspiration; ข้าวโพด; ข้าวฟ่าง; การใช้น้ำ; ผลผลิตของเมล็ด.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4114

Experimentation on suitability of water requirements for sweet corn, super sweet variety
Provedor de dados: 106
Autores: Yongyot Supasak; Suwit Chourdumrongkul; Tanuchai Voralittanond; Sajee Charoenying.
Palavras-chave: Corn; Maize; Sweet corn; Water requirements; Irrigation; Yields; ข้าวโพด; ข้าวโพดหวาน; การใช้น้ำ; การให้น้ำ.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4136

Experimento de fertilidade com milho nos campos cerrados do Território Federal do Amapá.
Provedor de dados: 14
Autores: MEDEIROS, J. B. S. de.
bitstream/item/154156/1/Bol-inf125.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Região de Cerrado; Amapá; Brasil; Maize.; Adubação; Análise Estatística; Milho.; Método Estatístico; Amazonia; Fertilizer application; Statistical analysis.
Ano: 1967
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383457

Experimento nacional do milho.
Provedor de dados: 14
Autores: NAKAJIMA, R.
bitstream/item/154172/1/Bol-inf118.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Manaus; Amazonas; Brasil; Maize.; Análise Estatística; Milho.; Amazonia; Statistical analysis.
Ano: 1967
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382511

EXPLAINING THE ADOPTION AND DISADOPTION OF SUSTAINABLE AGRICULTURE: THE CASE OF COVER CROPS IN NORTHERN HONDURAS
Provedor de dados: 31
Autores: Neill,   Sean P.; Lee,   David R.
Although technology adoption has been the subject of a great deal of economic research, that focused on the economics of adoption of low-input "sustainable" systems has been much more limited and recent. This paper attempts to explain the recent decline in the use of cover crops using in maize farming in the Department of Atlantida, Honduras. In the early 1970's, farmers in the region began rotating maize with the velvetbean (mucuna ssp.), a system learned from Guatemalan immigrants. Tohe mucuna-maize system decreased the labor required for maize farming even as it increased yields, prevented erosion, and conferred a variety of other agronomic benefits. By 1992, estimates show that the system had diffused among more than 60% of farmers in the Department....
Tipo: Working or Discussion Paper
Palavras-chave: International development; Sustainable agriculture; Adoption; Disadoption; Farmer management; Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/14756

EXPLAINING THE CLIMATE-DEPENDENT DISTRIBUTION OF CROPS IN SPACE –THE EXAMPLE OF CORN AND CORN-COB-MIX IN BADEN-WÜRTTEMBERG
Provedor de dados: 31
Autores: Lippert,   Christian; Chatzopoulos,   Thomas; Schmidtner,   Eva; Aurbacher,   Joachim.
This article analyses the current climate-dependent spatial distribution of corn and corn-cob-mix in Baden-Württemberg using 2007 data at the county and community level. We use OLS and spatial econometric models to estimate the effects of different climate and non-climate variables on the share of grain maize in UAA. Whereas the temperature effect is missed by means of OLS regression, the adequate spatial error model at the county level yields a highly significant positive effect of mean annual temperature. Additionally, it displays a temperature cut-off point after which corn share is less likely to rise due to temperature increase. These effects are supported by a non-spatial multinomial logit model at the community level. The latter further indicates...
Tipo: Conference Paper or Presentation
Palavras-chave: Spatial distribution of corn; Spatial econometrics; Multinomial logit; Climate change; Agribusiness; Crop Production/Industries.
Ano: 2011
URL: http://purl.umn.edu/114504

Exploring the Herbicidal and Hormetic Potential of Allelopathic Crops Against Fenoxaprop-Resistant Phalaris minor
Provedor de dados: 87
Autores: ABBAS,T.; NADEEM,M.A.; TANVEER,A.; ALI,H.H.; SAFDAR,M.E.; ZOHAIB,A.; FAROOQ,N.
ABSTRACT: Recent increases in the development of herbicide resistance in Phalaris minor worldwide demand alternative non-chemical strategies to control this weed. A series of experiments were conducted under laboratory and greenhouse conditions to explore the herbicidal potential of four allelopathic crops, including maize, rice, sorghum and sunflower, at different concentrations of aqueous extracts (2.5% and 5%), residues (1%, 2% and 4%) and mulches (4, 8, and 12 ton ha-1) against fenoxaprop-resistant P. minor. Aqueous extracts, residues and mulches provided 86-100%, 73-100% and 16-40% control of this resistant weed biotype, respectively. The dry biomass reduction due to aqueous extracts, residues and mulches was 48-100%, 48-100% and 20-54%, respectively....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Alternative weed management; Hormesis; Littleseed canarygrass; Natural herbicides.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100257

Exportaçã de Milho: Ameaça Contra a Segurança Alimentar Rural? Resultados de Um Inquérito às Famílias Rurais do Norte de Moçambique
Provedor de dados: 31
Autores: SIMA, Research Team.
Resultados das investigações do SIMA-Dest e Departamento de Análise de Políticas MADER-Direcção de Economía
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Maize; Food Security and Poverty; International Relations/Trade; Q18.
Ano: 2002
URL: http://purl.umn.edu/55226

Expresión de proteínas y determinación de carbohidratos en maíz (Zea mays L.) en condiciones de estrés hídrico.
Provedor de dados: 32
Autores: Velázquez Márquez, Sabina.
La sequía es uno de los factores abióticos limitantes que causa reducción en el crecimiento, en la producción de biomasa y en el rendimiento de cultivos. Las variedades de maíz con cierta tolerancia a la sequía responden con cambios en su fisiología y metabolismo. Algunas de estas respuestas son disminución en el contenido relativo de agua, disminución del potencial osmótico, acumulación de solutos como la prolina y varios azúcares, así como también alteraciones en el contenido de proteínas. Las plantas de maíz tienen la capacidad de generar ajustes que les permite adaptarse y sobrevivir a ciertos niveles de déficit de agua. El objetivo del trabajo fue analizar el efecto del déficit de agua en la acumulación de solutos y en los cambios de proteínas en dos...
Palavras-chave: Relaciones hídricas; Acumulación de solutos; Maíz; RUBISCO; Proteínas solubles; Water relationships; Solutes accumulation; Soluble proteins; Botánica; Doctorado.
Ano: 2014
URL: http://hdl.handle.net/10521/2309

Expression and characterization of an N-truncated form of the NifA protein of Azospirillum brasilense
Provedor de dados: 56
Autores: Nishikawa,C.Y.; Araújo,L.M.; Kadowaki,M.A.S.; Monteiro,R.A.; Steffens,M.B.R.; Pedrosa,F.O.; Souza,E.M.; Chubatsu,L.S.
Azospirillum brasilense is a nitrogen-fixing bacterium associated with important agricultural crops such as rice, wheat and maize. The expression of genes responsible for nitrogen fixation (nif genes) in this bacterium is dependent on the transcriptional activator NifA. This protein contains three structural domains: the N-terminal domain is responsible for the negative control by fixed nitrogen; the central domain interacts with the RNA polymerase σ54 co-factor and the C-terminal domain is involved in DNA binding. The central and C-terminal domains are linked by the interdomain linker (IDL). A conserved four-cysteine motif encompassing the end of the central domain and the IDL is probably involved in the oxygen-sensitivity of NifA. In the present study,...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Biological nitrogen fixation; Azospirillum brasilense; NifA protein.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000200004

Expression of ZmLEA3, AOX2 and ZmPP2C genes in maize lines associated with tolerance to water deficit
Provedor de dados: 64
Autores: Marques,Thaís Lima; Von Pinho,Renzo Garcia; Von Pinho,Édila Vilela de Resende; Santos,Heloisa Oliveira dos.
ABSTRACT Knowing genes related to water deficit is a valuable tool to assist and accelerate the selection process of maize genotypes more adapted to drought conditions. Therefore, this work aimed to evaluate genes expression related to tolerance to water deficit in maize lines, using proteomic and transcriptomic analyses. Two lines previously classified as tolerant (91-T) and non-tolerant (57-NT) to low water availability were used. Dried seeds, ears tips, and seedlings (collected at three, five, and seven days after sowing) of the two maize lines (91-T and 57-NT) were used in proteomic analyses. Seedlings were subject to two contrasting water-availability conditions (70% and 10% of the water retention capacity). The expression of catalase, peroxidase, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; Electrophoresis; QRT-PCR.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100233

Extension and adoption of biofortified crops: Quality protein maize in East Africa
Provedor de dados: 31
Autores: De Groote,   Hugo; Gunaratna,   Nilupa S.; Ergano,   Kebebe; Friesen,   Dennis.
Biofortified crops, bred for improved nutritional quality, can alleviate nutritional deficiencies if they are produced and consumed in sufficient quantities. These varieties can be promoted based on their agronomic performance or based on their nutritional qualities. Quality protein maize (QPM) was the first biofortified crop and has been disseminated in Africa using both approaches. To study their effectiveness, a survey of rural households was conducted in the maize-growing areas of East Africa, comparing communities with access to QPM extension activities to control communities. The results show that a third to one half of the farmers in project communities participated in extension activities in all countries except Kenya. In these communities,...
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 2010
URL: http://purl.umn.edu/96429

Extracción y caracterización fisicoquímica y funcional del almidón de semilla de huauzontle (Chenopodium berlandieri Moq.).
Provedor de dados: 32
Autores: García Pérez, Lourdes Raquel.
El Huauzontle es un pseudocereal que se consume en México y puede ser una alternativa de producción de almidón. El objetivo de la presente investigación fue evaluar el rendimiento de almidón del huauzontle y sus características fisicoquímicas y funcionales, para determinar su posible uso industrial. El rendimiento utilizando NaOH fue muy bajo, 0.8%, con H2O al 50% v/p fue de 50%,  mientras que para papa fue de 68.81% y 67.58% en maíz. El contenido de humedad fue de 17.00 %, cenizas 1.90%, materia grasa 0.06%, proteína 9.95% y carbohidratos 71.09 %. La capacidad de retención de agua (CRA) disminuyó al aumentar la temperatura, a 50oC fue 4.38 y a 80oC de 1.93 g de agua/g de muestra; similar comportamiento mostró el factor de hinchamiento (FH), al incrementar...
Palavras-chave: Chenopodium berlandieri; Fisicoquímica del almidón; Propiedades funcionales del almidón; Starch physicochemical; Functional properties of starch; Maestría Tecnológica; Agroindustria.
Ano: 2013
URL: http://hdl.handle.net/10521/2005

Extractants to assess zinc phytoavailability in mineral fertilizer and industrial by-products
Provedor de dados: 90
Autores: Souza,Camila Prado Cenciani de; Abreu,Cleide Aparecida de; Andrade,Cristiano Alberto de; Abreu,Mônica Ferreira de.
Efficient analytical methods for the quantification of plant-available Zn contained in mineral fertilizers and industrial by-products are fundamental for the control and marketing of these inputs. In this sense, there are some doubts on the part of the scientific community as well as of the fertilizer production sector, whether the extractor requested by the government (Normative Instruction No. 28, called 2nd extractor), which is citric acid 2 % (2 % CA) (Brasil, 2007b), is effective in predicting the plant availability of Zn via mineral fertilizers and about the agronomic significance of the required minimal solubility of 60 % compared to the total content (HCl) (Brasil, 2007a). The purpose of this study was to evaluate the alternative extractors DTPA,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Micronutrients; Industrial waste; Solubility; Zea mays.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400018

Extraction, characterization and microencapsulation of isoflavones from soybean molasses
Provedor de dados: 65
Autores: Batista,Vanessa Sabrina Fagundes; Nunes,Graciele Lorenzoni; Viegas,Gabriela Ilha; Lucas,Bruna Nichelle; Bochi,Vivian Caetano; Emanuelli,Tatiana; Barin,Juliano Smanioto; Menezes,Cristiano Ragagnin de; Rosa,Claudia Severo da.
ABSTRACT: This study aimed to extract isoflavones from soybean molasses with different solvents, furthermore, the selected extract, which showed overall desirable characteristics was selected to evaluate the potentials of different encapsulating agents. The encapsulating agents employed for the study included 18% Maltodextrin DE20 (T1), 18% Hi-maize (T2), and a mixture of equal proportions of 9% Maltodextrin DE20 and 9% of Hi-maize (T3). Solvents such as 80% ethanol and methanol, and grain alcohol in varying different concentrations of 50 and 80% were used for the studies. The best solvent for the extraction of phenolics and total isoflavones was 50% cereal alcohol, this extract also presented higher antioxidant activity. Evaluation of the encapsulating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spray-drying; Antioxidant; Phenolics; Isoflavones.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000300751

Faba beans (Vicia faba L.) and field peas (Pisum sativum L.) as feedstuffs for broiler chicken: Precaecal protein and amino acid digestibility
Provedor de dados: 21
Autores: Witten, Stephanie; Grashorn, Michael; Aulrich, Karen.
Especially in areas with suboptimal conditions for the cultivation of soybeans, homegrown grain legumes, like faba beans and field peas, are very important protein feedstuffs for monogastric animals, like swine and poultry, in organic farming. Homegrown grain legumes contribute to the circular ecology of organic farms and add to the supply of essential amino acids to the diet.  However, their value is not only determined by the crude protein content and amino acid profile but also by the bioavailability of crude protein and amino acids. Since only precaecally absorbed amino acids are potentially available in the metabolism, the precaecal digestibility of the crude protein and the amino acids can give a hint on their bioavailability.   The aim of the study...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Feeding and growth Poultry.
Ano: 2019
URL: http://orgprints.org/35571/1/Wittenetal2019_ILS3.pdf

Factor analysis and SREG GGE biplot for the genotype × environment interaction stratification in maize
Provedor de dados: 65
Autores: Fritsche-Neto,Roberto; Miranda,Glauco Vieira; DeLima,Rodrigo Oliveira; Souza,Heraldo Namorato de.
The objective of this study was to evaluate the use of SREG GGE biplot methodology and factor analysis to stratify the genotype×environment interaction in maize. Forty-nine early maize hybrids were evaluated in nine environments. The experimental design used was a 7×7 square lattice with two replicates. Each plot consisted of two 5m long rows spaced 0.90m apart. Grain yield data were used to perform the analysis. The results indicated the existence of two mega-environments in the State of Minas Gerais, Brazil, for early maize hybrids. The stratification of the environment by factor analysis was more selective to join the similarity the according with cultivar performance. However, this approach did not identify specific genotype x environment interactions,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Adaptability; Stability.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000500007

FACTORS AFFECTING ADOPTION OF IMPROVED MAIZE SEEDS AND USE OF INORGANIC FERTILIZER FOR MAIZE PRODUCTION IN THE INTERMEDIATE AND LOWLAND ZONES OF TANZANIA
Provedor de dados: 31
Autores: Kaliba,   Aloyce R.; Verkuijl,   Hugo; Mwangi,   Wilfred.
This paper examines factors influencing the adoption of improved maize seeds and the use of inorganic fertilizer for maize production by farmers in the intermediate and lowland zones of Tanzania. The results indicate that availability of extension services, on-farm field trials, variety characteristics and rainfall were the most important factors that influenced the extent of adopting improved maize seeds and the use of inorganic fertilizer for maize production. Farmers preferred those varieties which minimize field loss rather than maximizing yields. Future research and extension policies should emphasize farmer participation in the research process and on-farm trials for varietal evaluation and demonstration purposes.
Tipo: Journal Article
Palavras-chave: Adoption; Agroecological zones; Improved maize seeds; New technology; Tanzania; Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/15392

Factors Affecting Maize Producers Adoption of Forward Pricing in Price Risk Management: The Case of Vaalharts
Provedor de dados: 31
Autores: Jordaan,   Henry; Grove,   Bennie.
Logistic regression is employed to analyse the factors which influence the decision of whether or not the respondent used forward pricing methods during the 2004/05 maize production season.  Forward pricing methods include cash forward contracting and hedging with futures contracts and/or options, through the South African Futures Exchange (SAFEX).  Based on the results, the use of forward pricing is associated with lower levels of risk aversion and higher levels of human capital.  Factor analysis is employed to reduce the dimensionality of the personal reasons which help to interpret the underlying, common factor of the personal reasons why farmers are reluctant to use forward pricing methods.   Three factors were extracted and were labelled “Lack of...
Tipo: Journal Article
Palavras-chave: Forward pricing; Logit; Factor analysis; Agricultural Finance; Risk and Uncertainty.
Ano: 2007
URL: http://purl.umn.edu/7049

Factors affecting the use of forward pricing methods in price risk management with special reference to the influence of risk aversion
Provedor de dados: 31
Autores: Jordaan,   Henry; Grove,   Bennie.
Risk aversion is the primary reason for farmers to use forward pricing methods to hedge against price risk. Previous international research on farmers’ forward pricing behaviour found inconsistent results with respect to the relationship between risk aversion and the use of forward pricing methods. Ordinary Least Squares (OLS) regression is used in this research to investigate the relationship between the proportion of maize Vaalharts maize producers are willing to forward price and risk aversion. The quantity decision is modelled conditional on the adoption decision to ensure that the modelling procedure does not force the same variables to influence the two decisions in the same way. Regression results showed that more risk averse farmers are forward...
Tipo: Journal Article
Palavras-chave: Forward pricing; Risk aversion; Farm characteristics; Linear regression; Crop Production/Industries; Marketing; Risk and Uncertainty.
Ano: 2008
URL: http://purl.umn.edu/5970

Factors Contributing to Zambia’s 2010 Maize Bumper Harvest
Provedor de dados: 31
Autores: Burke,   William J.; Jayne,   Thomas S.; Chapoto,   Antony.
Key Points • Zambia’s maize crop grew by 48% between the 2009 and 2010 harvests, leading to the largest crop recorded in recent history. • Yield growth accounted for 59% of the maize production growth between 2009 and 2010. Expansion of area planted to maize explains an additional 23%, while the remaining 18% can be attributed to a rise in the ratio of harvested to planted land. • Favourable weather conditions contributed 47% of the maize yield growth between 2009 and 2010, whilst, 25% came from increased fertilizer use from both the private and public sectors, and 23% from area expansion. The remaining 5% can be attributed to hybrid seed use and improved management. • Due to favorable weather conditions in both 2008/09 and 2009/10 growing seasons, maize...
Tipo: Report
Palavras-chave: Agricultural and Food Policy; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Food Security and Poverty.
Ano: 2010
URL: http://purl.umn.edu/97034

Factors Contributing to Zambia's 2010 Maize Bumper Harvest
Provedor de dados: 31
Autores: Burke,   William J.; Jayne,   Thomas S.; Chapoto,   Antony.
Zambia’s maize crop grew by roughly 48% between the 2009 and 2010 harvests, leading to the largest crop recorded in recent history. The 2009 maize harvest was also very good, making the 48% rise in 2010 even more remarkable. The forces driving that increase, however, remain widely debated. Many in government and media have attributed the recent production increase to the government’s fertilizer subsidy program as well as to the state’s recent efforts to raise maize prices through the operations of the Food Reserve Agency. Others have argued that the bumper harvest is partially due to the adoption of conservation farming techniques by farmers. Still others attribute the maize production growth mainly to favorable weather. Unfortunately, none of these claims...
Tipo: Report
Palavras-chave: Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Productivity Analysis.
Ano: 2010
URL: http://purl.umn.edu/97036

FACTORS EXPLAINING THE DIFFUSION OF HYBRID MAIZE: EVIDENCE FROM LATIN AMERICA AND THE CARIBBEAN IN SUPPORT OF THE LIFE CYCLE THEORY OF SEED INDUSTRY DEVELOPMENT
Provedor de dados: 31
Autores: Kosarek,   Jennifer; Morris,   Michael L.; Garcia,   Philip.
Factors affecting the diffusion of hybrid maize are explored using a unique data set from 18 countries in Latin America and the Caribbean. Our findings not only validate the conventional profitability-based explanations of farmer adoption behavior, but also confirm the importance of supply-side factors, providing empirical support for the life cycle theory of seed industry development.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/21596

Factors Influencing the Profitability of Fertilizer Use on Maize in Zambia
Provedor de dados: 31
Autores: Xu,   Z.; Guan,   Zhengfei; Jayne,   Thomas S.; Black,   J. Roy.
Major Findings: The additional maize produced from a given amount of fertilizer applied varied widely across households even after largely controlling for soil and rainfall conditions. The median estimated response rate was 15.9kgs of maize per kg nitrogen applied; Under the range of conditions and smallholder management practices, average maize fertilizer response rates declined as the application rate increased beyond 2 bags of urea and 2 bags of D compound; Factors raising the response rate and profitability of fertilizer use included timely availability, application rates less than the MOA 4x4 recommendation, use of animal draft power in land preparation, and use of hybrid seed. In remote areas, and given current management practices, fertilizer use...
Tipo: Report
Palavras-chave: Agriculture; Africa; Zambia; Fertilizer; Crop Production/Industries; Q12.
Ano: 2009
URL: http://purl.umn.edu/54639

Factors Influencing the Profitability of Fertilizer Use on Maize in Zambia.
Provedor de dados: 31
Autores: Xu,   Zhiying; Guan,   Zhengfei; Jayne,   Thomas S.; Black,   J. Roy.
Fertilizer use remains very low in most of Africa despite widespread agreement that much higher use rates are required for sustained agricultural productivity growth. This study estimates maize yield response functions in agro-ecological Zone IIA, a relatively high potential zone of Zambia, to determine the profitability of fertilizer use under a range of small farm conditions found within this zone. The theoretical framework used in this study incorporates agronomic principles of the crop growth process. The model distinguishes different roles of inputs and non-input factors in crop production. We estimate the effects of conventional production inputs as well as household characteristics and government programs on maize yield for households in the...
Tipo: Report
Palavras-chave: Zambia; Maize; Fertilizer; Profitability; Crop Production/Industries; Q12.
Ano: 2009
URL: http://purl.umn.edu/54500

Farm demonstration
Provedor de dados: 106
5 tables
Palavras-chave: Corn; Maize; Sorghum; Farm demonstration; Varieties; Variety trials; Yields; ข้าวโพด; ข้าวฟ่าง; แปลงสาธิต.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3810

Farm demonstration
Provedor de dados: 106
Autores: Teerasak Manupeerapan; Kitti Khajan; Chawana Boonreung.
2 tables
Palavras-chave: Corn; Maize; Sorghum; Farm demonstration; Varieties; Fertilizers; Yields; ข้าวโพด; ข้าวฟ่าง; แปลงสาธิต.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3836

Farm level cost of reducing nitrate leaching by economic instruments in Croatian farming systems
Provedor de dados: 31
Autores: Sumelius,   John; Grgic,   Zoran; Mesic,   Milan; Franic,   Ramona.
Croatian farming systems have become more intensive in recent years. There is some evidence of rising NO3-N-levels in ground water. The aim of the paper is to find pos-sible ways of preventing NO3-levels to rise in Croatian farming systems and their im-plications from the viewpoint of the manager. More specifically the purpose is to 1. Determine whether Croatian farmers exceed profit maximising levels of N-fertiliser use in maize cultivation and possible influence on NO3-N-levels. 2. To estimate the marginal abatement cost (MAC) at farm level of reducing NO3-N leaching through following economic instruments: a tax on optimal N-doses, a product tax and a N-fertiliser quota, all instruments corresponding to the same abatement level. Based on N-response...
Tipo: Working or Discussion Paper
Palavras-chave: Farm Management.
Ano: 2002
URL: http://purl.umn.edu/18884

Farmer Management of Maize Diversity in the Central Valleys of Oaxaca, Mexico: CIMMYT/INIFAP 1998 Baseline Socioeconomic Survey
Provedor de dados: 31
Autores: Smale,   Melinda; Aguirre,   Alfonso; Bellon,   Mauricio R.; Mendoza,   Jorge; Rosas,   Irma Manuel.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/7689

Farmer Organization, Collective Action and Market Access in Meso-America
Provedor de dados: 31
Autores: Hellin,   Jonathan; Lundy,   Mark; Meijer,   Madelon.
The global agricultural economy is changing. Commodity prices are declining, and producers increasingly supply complex value chains. There is growing interest in how farmers can benefit from emerging market opportunities. Farmers are encouraged to produce high value crops and engage in value-adding activities such as agro-processing. Farmer organization and collective action are often seen as key factors in enhancing farmers’ access to markets. Often too little attention is directed at a) the most appropriate types of organization, b) whether the public and/or private sector is best placed to support their formation, and c) the conditions necessary for ensuring their economic viability. This paper reports on research in Mexico and Central America that...
Tipo: Journal Article
Palavras-chave: Smallholder farmers; Maize; High value agricultural products; Mexico; Central America; Business development services; Value chains; Pro-poor growth; Agribusiness.
Ano: 2007
URL: http://purl.umn.edu/47907

Farmer Preferences for Milpa Diversity and Genetically Modified Maize in Mexico:  A Latent Class Approach
Provedor de dados: 31
Autores: Birol,   Ekin; Villalba,   Eric Rayn; Smale,   Melinda.
Maize, the second most globally important staple crop after wheat, originated in Mexico, where it is typically grown as part of a set of associated crops and practices called the milpa system. This ancient mode of production is practiced today in ways that vary by cultural context and agro-environment. Milpas generate private economic value, in terms of food security, diet quality and livelihoods, for the two-million farm households who manage them. Furthermore, milpas generate public economic value by conserving agrobiodiversity, especially that of maize landraces, which have the potential to contribute unique traits needed by plant breeders for future crop improvement. In this way, milpas contribute to global food security in maize. However, the...
Tipo: Working or Discussion Paper
Palavras-chave: Mexico; Maize; Genetically modified crops; Conservation; Crop Production/Industries.
Ano: 2007
URL: http://purl.umn.edu/42373

Farmers' Coverage under Market Intervention Scheme in Karnataka
Provedor de dados: 31
Autores: Rajkumar,   P.K.; Mahajanashetti,   S.B.; Basavaraja,   H.; Vijayakumar,   H.S.; Havaldar,   Y.N.
The coverage of onion and maize growers has been analyzed under Market Intervention Scheme (MIS) in Karnataka by selecting two northern districts of the state, viz. Dharwad and Gadag. The study has used simple tabular analysis along with discriminant analysis. The coverage of farmers under the scheme has not been found satisfactory. The main problems being faced by the farmers in availing MIS benefits have been identified to include procedural complexities of the scheme, delayed payments and the requirement of meeting Fair Average Quality (FAQ) stipulations for the crops. It has also been revealed that farther are the procurement centres, more is the likelihood of the farmers to go in for open market sales. The study has suggested to cover a larger number...
Tipo: Journal Article
Palavras-chave: Marketing.
Ano: 2008
URL: http://purl.umn.edu/47362

Farmers’ perceptions on cassava cultivation in Cambodia
Provedor de dados: 106
Autores: Sopheap, U.; Aran Patanothai; Aye,T.M.
Cassava is one of the most important upland crops of Cambodia. While improved technologies are needed for sustainable production of the crop, their adoption depends on how farmers view cassava against other crops. The objective of this study was to assess the perception of Cambodian farmers on growing cassava, relative to other upland crops. The study was conducted in Kampong Cham province in Northeast Cambodia which has the largest cassava production area in the country. Secondary data on production and price of cassava and other crops were collected, and 45 households in four cassava production zones were interviewed to obtain information on farmer’s perceptions on cassava and other crops. The results showed that production of cassava and other upland...
Tipo: Collection
Palavras-chave: Cassava production; Upland crops; Farmers’ preference; Farmers’ attitude; Technology adoption; Combodia; มันสำปะหลัง; ทัศนคติ; เกษตรกร; การตลาด; การผลิต; เทคโนโลยีการผลิต; กัมพูชา.
Ano: 2011
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5122

Farmers' Seed Selection Practices and Maize Variety Characteristics in a Traditionally-Based Mexican Community
Provedor de dados: 31
Autores: Louette,   Dominique; Smale,   Melinda.
Experimental results and farmer surveys in a Mexican community indicate that farmers’ seed selection practices protect the phenological integrity of their maize varieties as they define them, despite numerous factors contributing to genetic instability. Analysis of morphological and genetic data suggests that when subjected to significant gene flow through cross-pollination, ear characteristics are maintained through farmers’ selection even though other characteristics may continue to evolve genetically. Because the effects of farmers’ selection practices are confined largely to ear characteristics and plant characteristics that are linked to them, their practices appear to offer only limited scope for improving varieties. Farmers’ expectations of what...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/7667

Farmers' Subjective Valuation of Subsistence Crops: The Case of Traditional Maize in Mexico
Provedor de dados: 31
Autores: Arslan,   Aslihan; Taylor,   J. Edward.
Shadow prices guide farmers' resource allocations, but for subsistence farmers growing traditional crops, shadow prices may bear little relationship with market prices. We econometrically estimate shadow prices of maize using data from a nationally representative survey of rural households in Mexico. Shadow prices are significantly higher than the market price for traditional but not improved maize varieties. They are particularly high in the indigenous areas of southern and southeastern Mexico, indicating large de facto incentives to maintain traditional maize there.
Tipo: Working or Discussion Paper
Palavras-chave: Shadow prices; Non-market values; Supply response; Traditional crops; Onfarm conservation; Mexico; Agricultural and Food Policy; Community/Rural/Urban Development; International Development; O12; O13; Q12; Q39.
Ano: 2008
URL: http://purl.umn.edu/44488

Farmers' Taxonomies as a Participatory Diagnostic Tool: Soil Fertility Management in Chihota, Zimbabwe
Provedor de dados: 31
Autores: Bellon,   Mauricio R.; Gambara,   Peter; Gatsi,   Tendai; MacHemedze,   Timothy E.; Maminimini,   Obert; Waddington,   Stephen R.
Soil infertility is a major constraint to food production in the communal areas of Zimbabwe. Smallholders in the region recognize the problems of low soil fertility and have devised ways of coping with them. This study describes the use of farmers’ taxonomies of themselves and their soils to identify and understand the options they have, and the constraints they face in managing poor soil fertility in Chihota, a sub-humid communal area of north central Zimbabwe. It is part of an effort by a group of agricultural researchers and extensionists working on improved soil fertility technologies, to better integrate their work with farmers in order to expose the latter to promising technologies, get feedback on the technologies merits and feasibility, and help...
Tipo: Working or Discussion Paper
Palavras-chave: Participatory methods; Soil fertility; Local taxonomies; Smallholders; Zimbabwe; Farm Management; Land Economics/Use.
Ano: 1999
URL: http://purl.umn.edu/7677

Farmers' Use of Improved Seed Selection Practices in Mexican Maize: Evidence and Issues from the Sierra de Santa Marta
Provedor de dados: 31
Autores: Rice,   Elizabeth; Smale,   Melinda; Blanco,   Jose-Luis.
The principal advantage of in situ conservation is that it allows adaptive evolutionary processes to continue in the species that are being conserved. For a cultivated crop species, in situ conservation involves farmers' management of their own genetic resources even as the farmers themselves adapt to a changing environment. Improved seed selection practices and other on-farm breeding strategies have been proposed as a means of providing economic incentives for farmers to continue growing traditional varieties or landraces identified as important for conservation. This paper describes a pilot study among a group of indigenous farmers in the Sierra de Santa Marta, Veracruz, Mexico, who have collaborated in such efforts. The findings raise key issues about...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/7690

FARMING IN THE EASTERN AMAZON-POOR BUT ALLOCATIVELY EFFICIENT
Provedor de dados: 31
Autores: Sauer,   Johannes; Mendoza-Escalante,   Arisbe.
This  research  empirically  investigates  the  well  known  'poor-but-efficient'  hypothesis formulated by Schultz  (1964) assuming  that small scale  farmers  in developing countries are reasonably  efficient  in  allocating  their  scarce  resources  by  responding  positively  to  price incentives. Deviating from Schultz it is assumed here that scale effects explain a considerable proportion  of  small  scale  farmers' relative  efficiency. The  theoretical  underpinnings of the scale efficiency concept are briefly reviewed before a normalized generalized Leontief profit function is modeled by using its output supply and input demand system to capture the joint production of cassava  flour and maize by a sample of small scale farmers in the Bragantina...
Tipo: Conference Paper or Presentation
Palavras-chave: Efficiency; Joint Production; Small Scale Farming; Schultz Hypothesis; Farm Management.
Ano: 2007
URL: http://purl.umn.edu/7573

Farming System Approach for Sustainable Development of Agriculture in Mountain Regions — A Case of Himachal Pradesh
Provedor de dados: 31
Autores: Sharma,   K.D.; Pathania,   M.S.; Lal,   Harbans.
This paper has examined the emerging issues, extent of transitions and their implications for the sustainable and balanced development of agriculture in the mountain areas of the country. The study undertaken in low and mid-hill regions of Himachal Pradesh is based upon the data collected during the period 2002-03 from 200 sample households selected from 10 villages, representing five major mountain farming systems (MFS), viz. maize-based, paddy-based, vegetable-based, fruit-based and livestock-based. It has been found that over a period of time lot of changes have taken place in the socio-economic milieu and agricultural practices in mountains. The cropping pattern, extent of diversification and commercialization have been found to vary considerably...
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy.
Ano: 2006
URL: http://purl.umn.edu/57781

FARM-LEVEL INCENTIVES FOR FERTILIZER USE IN RWANDA'S KIGALI RURAL PROVINCE: A FINANCIAL ANALYSIS
Provedor de dados: 31
Autores: Mugabo,   Josaphat R.
The objective of this study was to evaluate the profitability of the main food crops in the context of the current government policy of promoting the use by farmers of improved inputs. This study tried to estimate the magnitudes of costs associated with the use of chemical fertilizer on climbing beans, maize, sorghum and soybeans grown in the province of Kigali rural and the benefits farmers would get by investing their labor and money in these crops. In less detail, this study analyzed some recent survey data seeking to put crop production in a wider perspective of the household's limitations and/or opportunities when dealing with the issue of improving crop yields on its land. Data analysis was done at the agroecological zone level and considered the...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/11109

Fasevoeding met maïsmeel bij biologisch melkvee
Provedor de dados: 21
Autores: Klop, A.; Zonderland, J.L.; Van Riel, J.W.
Fasevoeding met maïsmeel in de biologische veehouderij betekende voor de koeien in het begin van de lactatie een positieve energiebalans, maar een tegenvallende melkproductie. In de proef werd maïsmeel gebruikt om koeien in het begin van de lactatie extra energie te geven in vergelijking met een rantsoen met snijmaïs. De voeropname van de maïsmeel koeien was hoger, maar de melkgift lager. Daarmee hadden deze koeien een positieve energiebalans. De koeien die snijmaïs kregen, gaven meer melk en zij realiseerden een hoger saldo. Krachtvoeradvisering met DLM gaf een extra besparing op krachtvoer. Het systeem biedt kansen om zelf (of regionaal) geteelde granen op maat te voeren aan koeien.
Tipo: Report
Palavras-chave: Dairy cattle; Feeding and growth; Netherlands.
Ano: 2010
URL: http://orgprints.org/19136/1/Fasevoeding_met_maismeel_bij_biologisch_melkvee.pdf

Fatores de perdas em cultivares de milho safrinha - DOI: 10.4025/actasciagron.v26i2.1891
Provedor de dados: 1
Autores: Picanço, Marcelo Coutinho; UFV, Centro de Ciências Biológicas e da Saúde; Semeão, Altair Arlindo; UFV; Galvão, João Carlos Cardoso; UFV; Silva, Ézio Marques da; UFV; Barros, Emerson Cristi de; UFV.
Este trabalho objetivou estudar os fatores de perdas incluindo insetos-praga e seus inimigos naturais, em 49 cultivares de milho em cultivo na época da safrinha de 5/02 a 11/09/1999, em Coimbra, MG. Para estudo das perdas, utilizou-se tabela de vida de cultura. A produtividade média foi alta (3386,59kg/ha). As cultivares mais produtivas foram: CO 34, Mitla 9742, XB 7012, HTEP 22, P 30F80, Hata 2025 e XB 7070. A perda acumulativa total, considerando a média de todas as cultivares, foi de 33,92%. O componente de produção no qual ocorreu maior perda foi o grão, seguido pelo óvulo, plantas e espigas. O componente crítico de perdas foi o grão. O fator-chave de perdas foi o ataque de Sitophilus zeamais (Coleoptera: Curculionidae) aos grãos seguido pelo ataque de...
Palavras-chave: 5.00.00.00-4    Ciências Agrárias tabela de vida; Sitophilus zeamais; Helicoverpa zea; Dalbulus maidis; Doru luteipes 5.00.00.00-4    Ciências Agrárias.
Ano: 2004
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1891

Feed composition and strategies to improve poly-unsaturated fatty acid levels in organic cow milk
Provedor de dados: 21
Autores: de Wit, Jan; de Vries, Anneke.
Like in various other countries, organic milk in the Netherlands has higher levels of poly-unsaturated fatty acids, particularly CLA and omega-3, than conventional milk.  Monitoring results from a total of 25 farms between 2004 till 2007 are presented. Regression analysis indicates a negative effect of maize silage and positive effects of feeding fresh grass, grass pellets, red clover and addition of oil on CLA levels in milk fat. Results with omega-3 are similar, but omega-3 levels in milk fat seem less related to feed characteristics: the model with feed composition, seasonal effects and farm effects as major parameters, explains a smaller part of the variation, while farm influence is much larger with omega-3 compared to CLA.   Farm influence might be...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Feeding and growth.
Ano: 2008
URL: http://orgprints.org/11663/1/DeWit_11663_ed.doc

Feeding value of hard endosperm Opaque-2 corn, high lysine sorghum and various varieties of low tannin sorghum for broiler
Provedor de dados: 106
Autores: Prateap Rachapaetayakom; Ankana Hanbranchong; Suporn Sukhupanyaraxa.
9 tables
Palavras-chave: Broiler chickens; Corn; Maize; Sorghum; Opaque-2; Hard endosperm; Feeding value; Lysine; Tannin; Rations; Feeding; Feeds; Ingredients; Growth; ข้าวโพด; ข้าวฟ่าง; โอเพค 2; แป้งแข็ง; คุณค่าทางอาหารสัตว์; ไลซีน; แทนนิน; สูตรอาหาร; ไก่กระทง.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3879

Feedlot performance and carcass yield of Hararghe Highland (Bos indicus) bulls using different concentrate feeds
Provedor de dados: 2
Autores: Gebremariam, Tsegay Teklebrhan.
A study was conducted to evaluate the feedlot performance and carcass yield of Hararghe Highland bull using different types of concentrate feeds fed grass hay as a basal diet in eastern Ethiopia. Thirty Hararghe Highland bulls were blocked by weight and randomly allocated to one of the following six treatments. T1 = Hay ad libitum + 4kg dried cafeteria leftover; T2 = Hay ad libitum + 4kg wheat bran; T3 = Hay ad libitum + 4 kg d-1 maize grain; T4 = Hay ad libitum + 4kg d-1 mix (1:1, wheat bran to maize grain, respectively); T5 = Hay ad libitum + 4kg scrambled whole groundnut; T6 = Hay ad libitum + 4kg d-1 mix (equal proportion of maize grain, wheat bran, dried cafeteria leftover and scrambled whole groundnut. Bulls were fed for 90 days and slaughtered for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Concentrate; Carcass yield; Feedlot; Hararghe Highland bull.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/42557

Fermentation characteristics and nutritive values of sorghum silages
Provedor de dados: 2
Autores: Veriato, Florence Taciana; Pires, Daniel Ananias De Assis; Tolentino, Daniela Cangussú; Alves, Dorismar David; Jayme, Diogo Conzaga; Moura, Marielly Maria Almeida.
The objective of this study was to select sorghum genotypes for silage production. The study was carried out at Embrapa Maize &amp; Sorghum’s experimental field. Planting was performed in randomized blocks, with three replicates and the Scott-Knott test at a 5% probability level. The material was ensilaged in laboratory silos opened after 56 days for analysis concerning fermentation and bromatological composition. Only crude protein showed no significant difference (p &gt; 0.05), with an overall mean of 8.88%. The other variables presented significant differences (p &lt; 0.05): pH (3.34 to 3.94); Aw (0.93 to 0.98); N-NH 3/TN (1.61 to 6.56%); green matter yield (12.05 to 34.14 t ha-1); dry matter yield (6.19 to 11.42 t ha-1); dry matter (26.89 to 49.95%);...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: ZOOTECNIA:FORRAGICULTURA digestibility; Genotypes; Productivity.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/34458

Fermentation characteristics in hay from Cynodon and crop stubble treated with exogenous enzymes
Provedor de dados: 124
Autores: Santana,Yânez André Gomes; Vasconcelos,Vânia Rodrigues; Alves,Arnaud Azevêdo; Silva,Suzana Coimbra de Moura Lustosa e; Garcez,Bruno Spindola.
ABSTRACT The effect of treatment with xylanase and β-glucanase was evaluated for gas production and the ruminal degradation of nutrients from the hay of Tifton 85 grass and the stubble of maize, sorghum, peanut, sunflower and sesame crops. Two commercial fibrolytic enzymes were used (Dyadic xylanase PLUS - Xylanase; BrewZyme LP-β-glucanase), added to the hay at doses of 7.5 units of endoglucanase and 0.46 units of xylanase per 500 mg/gDM, for the cellulase and xylanase products respectively. The chemical composition of the hay was determined for no enzyme application and 24 hours after enzyme treatment, and the in vitro gas production and in situ microbial degradation was estimated for dry matter, organic matter, neutral detergent fibre and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis hypogaea; Β-glucanase; Helianthus annuus; Sesamum indicum; Sorghum bicolor; Xylanase.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100167

Fertilizer experiments on corn in Vietnam
Provedor de dados: 106
Autores: Tran Van Nao; Bui Huu Tri.
1 ill., 11 tables
Palavras-chave: Corn; Maize; Fertilizers; Yields; Vietnam; ข้าวโพด; เวียดนาม; ปุ๋ย.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3734

FERTILIZER MARKET REFORM AND THE DETERMINANTS OF FERTILIZER USE IN BENIN AND MALAWI
Provedor de dados: 31
Autores: Minot,   Nicholas; Kherallah,   Mylene; Berry,   Philippe.
Most countries in sub-Saharan Africa have reduced or eliminated fertilizer subsidies and liberalized input marketing as part of the reform process that began in the early 1980s. The effect on fertilizer prices and use is one of the most frequently mentioned criticisms of liberalization. The effect of these reforms, however, has varied widely across countries. For example, in Benin fertilizer use has increased ten-fold since 1982, while in Malawi it has risen just 30 percent, less than population growth over the period. This paper explores the factors behind these widely different experiences with input market reform. It relies in part on household survey data collected by IFPRI and collaborating institutions in 1998. The two surveys used nationally...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/16127

Fertilizer profitability in East Africa: A Spatially Explicit Policy Analysis
Provedor de dados: 31
Autores: Guo,   Zhe; Koo,   Jawoo; Wood,   Stanley.
Even though it is clear that Substantial growth in inorganic fertilizer use is a prerequisite for sustained agricultural growth in Africa, fertilizer use is still one of the factors explaining lagging agricultural productivity growth in SSA. High transport costs and less policy support pose a significant barrier to make fertilizer application profitable in Africa. This paper is aimed to identify organizational and institutional changes that could reduce fertilizer transport costs and their impacts on profitability of fertilizer application. A model is constructed to simulated transport costs from ports to farm-gate at pixel level based on the knowledge of road network condition, surface land cover type, slope, imported fertilizer price at the port, storing...
Tipo: Conference Paper or Presentation
Palavras-chave: Fertilizer profitability; Value cost ratio; Transport cost; East Africa; Agribusiness; Agricultural and Food Policy; International Development; Marketing.
Ano: 2009
URL: http://purl.umn.edu/51710

Fertilizer responses on new early maturity corn varieties
Provedor de dados: 106
Autores: Boon-Ampol, P.; Meesawat, R.; Masarngsan, V.
Palavras-chave: Corn; Maize; Varieties; Fertilizers; Variety trials; Yields; ข้าวโพด; การทดสอบปุ๋ย; ผลผลิต.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4108

Fertilizer responses on new late maturity corn varieties
Provedor de dados: 106
Autores: Boon-Ampol, P.; Meesawat, R.; Masarngsan, V.; Chuntarapunic, S.
Palavras-chave: Corn; Maize; Varieties; Fertilizers; Variety trials; Yields; ข้าวโพด; การทดสอบปุ๋ย; ผลผลิต.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4109

Fertilizer trial on corn and sorghum
Provedor de dados: 106
Autores: Ring Meesawat; Dumri Thawornmas; Tianchai Suvanvej; Pradit Boonampol; Mongkol Panichkul.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizer trials; Nitrogen fertilizers; Rock phosphate; Livestock manures; Soil chemicophysical properties; Nitrogen uptake; Soil types; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบปุ๋ย.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3926

Fertilizer Use and Maize Production in Sub-Saharan Africa
Provedor de dados: 31
Autores: Heisey,   Paul W.; Mwangi,   Wilfred.
In sub-Saharan Africa, greater use of mineral fertilizers is crucial to increasing food production and slowing the rate of environmental degradation. Regional growth rates in fertilizer consumption have never been particularly high, in part because the real price of fertilizer is higher in Africa than in many other developing regions. As subsidies have been removed and exchange-rate distortions corrected over the past decade or more, relative prices paid by farmers have risen to reflect more closely the economic cost of fertilizer. Consumption growth has thus slowed even more.  Nonetheless, during the period of declining growth in consumption, fertilizer use on cereals, particularly maize, has become relatively more important than use on cash crops....
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1996
URL: http://purl.umn.edu/7688

Fertilizer use and soil management for corn production
Provedor de dados: 106
Palavras-chave: Corn; Maize; Fertilizers; Soil management; ข้าวโพด; การใส่ปุ๋ย; ความอุดมสมบูรณ์ของดิน; การจัดการดิน.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4025

Fertilizer use on Smallholder Farm in Eastern Province, Zambia
Provedor de dados: 31
Autores: Dayanatha,   Jha; Behjat,   Hojjati.
IN Sub-Sahara Africa, Which so far has benefited little from the green revolution. the adoption of high-yielding maize had great potential for closing the gap between food demand and supply. To bring about this transformation, fertilizer is essential for realizing the yield potential of hybrid maize  while sustaining the fertility of Africa's fragile land. This study of Eastern Province, Zambia, shows that use of fertilizer on traditional varieties can also be a catalyst for agricultural growth. This work is part of an extensive body of research on adoption of new agricultural technology carried  out by IFPRi in Asia and Africa. The study was undertaken in collaboration with several Zambia institutions, including the Rural Development Studies...
Tipo: Report
Palavras-chave: Fertilizers; Zambia; Eastern province; Small Farms; Crop Production/Industries.
Ano: 1993
URL: http://purl.umn.edu/37967

Fertilizing Agricultural Land with Rainbow Trout Manure for Growing Silage Corn
Provedor de dados: 18
Autores: Smith, J.H.
Tipo: Article
Palavras-chave: Corn / maize; Corn; Mass Import - autoclassified (may be erroneous).
Ano: 1985
URL: http://eprints.nwisrl.ars.usda.gov/431/1/542.pdf

Fettsäurenmuster von österreichischer Vollweide-, Alm- und Trinkmilch sowie von Milch aus Maissilage-Ration
Provedor de dados: 21
Autores: Velik, Margit; Breitfuss, Sabine; Urdl, Marc; Hackl, Andrea; Steinwidder, Andreas.
Fatty acids have a major impact on nutritional and health issues in humans and can be used as a criteria to access the feeding intensity of livestock production systems. The purpose of the present study was to examine the fatty acid profile of dairy cow milk of different production systems: rations based on (1) maize silage and concentrates, (2) hay and concentrates, (3) continuous grazing on short grass and hay, (4) Alpine pasture systems, (5) milk from Austrian retail markets. About 250 milk samples were analysed. Regarding SFA und n-6 fatty acids, differences between milk origins were at about 10 % moderate. However, n-3 fatty acids and CLA were strongly influenced by production system. Milk from the continuous grazing system had at 1.4 g n-3 and 1.3 g...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Feeding and growth.
Ano: 2013
URL: http://orgprints.org/21294/1/21294_velik.pdf

Field comparison between selection methods at the maize seedling stage in relation to aluminum tolerance
Provedor de dados: 63
Autores: Giaveno,Carlos Daniel; Miranda Filho,José Branco de.
Selection and breeding for aluminum tolerance is a useful approach to increase maize (Zea mays L.) grain yield in acid soils. The objective of this work was the comparison between two screening approaches for the development of Al tolerant maize populations. One cycle of divergent selection for aluminum tolerance, using both nutrient solution and pots with acid soil, were completed in the maize population SIKALQ. The four sub-populations selected through both selection procedures were compared with the original population and checks in field trials repeated over locations. Eight environments stratified into four groups varying from non acid to high aluminum saturation were used. Three variables were analyzed for comparisons of methodologies: grain yield,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Acid soils; Seedling; Divergent selection.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200029

Field corn response to nitrogen as affected by previous winter crop
Provedor de dados: 18
Autores: Mayland, H.F.; Brown, B.D.; Murray, G.A.
Tipo: Conference or Workshop Item
Palavras-chave: Corn / maize; Mass Import - autoclassified (may be erroneous).
Ano: 1986
URL: http://eprints.nwisrl.ars.usda.gov/1042/1/624.pdf

Field corn testing program
Provedor de dados: 106
Autores: Pichet Grudloyma; Kritchai Jaiserb; Charas Kitbamroong; Yodsaporn Chantachum; Sanit Choowa; Amnuay Tongdee.
4 tables
Palavras-chave: Corn; Maize; Yield trial; ข้าวโพด; การทดสอบผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4362

Field corn variety for young ear corn production
Provedor de dados: 106
Autores: Thip Lekagul; Sithichoak Pernmamkhong; Chamnan Chutkaew; Vichitr Benjasil.
2 tables
Palavras-chave: Corn; Maize; Young ear corn; Varieties; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; ข้าวโพดฝักอ่อน; การผลิต.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4062

Field Insect Pests and Crop Damage Assessment of Pigeon Pea (Cajanus cajan [L.] Huth) grown under Ratoon and in Mixture with Maize
Provedor de dados: 117
Autores: Dasbak,Madang A; Echezona,Bonaventure C; Asiegbu,Jerry E.
The widespread adoption of cropping systems that are sustainable and environmentally friendly is vital for the macroeconomic survival of civilization. Intercropping could ensure stability of insect populations in a system. A 3-yr (2005-2007) field trial was therefore carried out in Nigeria under regular and ratoon crops to evaluate five recently developed pigeon pea (Cajanus cajan [L.] Huth) genotypes (ICPL 87, ICPL 161, ICPL 85063, ICP 7120, and ICPL 87119) from the International Crops Research Institute for Semi-Arid Tropics (ICRISAT) and one local variety for their relative performance and susceptibility to insect pests. The pigeon pea genotypes were in a mixture with two maize genotypes (Zea mays L., open-pollinated and hybrid) in regular crops for 2...
Tipo: Journal article
Palavras-chave: Cropping system; Ratoon crops; Regular crop.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100008

Field persistence of Bacillus thuringiensis on maize leaves (Zea mays L.)
Provedor de dados: 58
Autores: Haddad,Marinéia de Lara; Polanczyk,Ricardo Antonio; Alves,Sergio Batista; Garcia,Marcelo de Oliveira.
The persistence slope of Bacillus thuringiensis (Bt) based products in the field is an important parameter to evaluate their efficacy. The half-life, estimated based on persistence slope parameters, is one of the most effective tools to select microbial pesticides. The aim of this research was to study the relationship between viability loss of Bt spores on maize leaves and their concentration, comparing it with field persistence. The experimental design was split-plot on time, composed by maize plants, in which three concentrations (half, normal and double doses) of a Dipel commercial formulation were applied. In each plot three leaves in the upper part of three plants where randomly selected. Samples of these leaves were collected 3 to 72 hours after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Entomopathogen; Dipel; Maize leaves; Bacillus thuringiensis; Field persistence.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000400001

Field Simulation of Transgenic Seed Admixture Dispersion in Maize with a Blue Kernel Color Marker
Provedor de dados: 21
Autores: Dietiker, Dominique; Oehen, Bernadette; Ochsenbein, Christian; Westgate, Mark E.; Stamp, Peter.
Seed purity in maize (Zea mays L.) has been almost neglected in coexistence studies. In this study, the impact of initial seed admixture was assessed in 20 fields (17 integrated pest management [IPM] and three organics) in the Swiss Midlands in 2007 and 2008 and a seed admixture threshold was proposed. The bluekernelled French hybrid Adonis was used as a color-marker admixture. In 2009, its pollen production was assessed relative to those of two commercial hybrids (LG 32.12 and DKC 2960) that released 41 and 62%, respectively, less pollen than Adonis. Adonis was added to commercial yellow hybrid seeds at a proportion of 1:99. On average, the seed admixture at harvest was 2.8 times greater than the seed admixture at sowing. The greater pollen production of...
Tipo: Journal paper
Palavras-chave: Breeding; Genetics and propagation Environmental aspects Root crops.
Ano: 2011
URL: http://orgprints.org/25740/1/Dietiker_et_al_2011.pdf

Field test for corn varieties and fertilizers
Provedor de dados: 106
Autores: Vatcharee Lertmongkol; Chanika Patamadilok; Dusit Jaichareon; Vichitr Benjasil.
1 table
Palavras-chave: Corn; Maize; Varieties; Fertilizers; Yields; ข้าวโพด; พันธุ์; การทดสอบปุ๋ย; ผลผลิต.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3979

FIELD TRIALS AS AN EXTENSION TECHNIQUE: THE CASE OF SWAZILAND
Provedor de dados: 31
Autores: Abler,   David G.; Rauniyar,   Ganesh P.; Goode,   Frank M.
One potentially serious problem in evaluating the effectiveness of extension programs is that participants are not picked at random.  Self-selection can be a problem, and it can be compounded if extension officials concentrate on the most progressive farms.  This study explores the relationships between adoption of maize high-yielding varieties (HYVs) and participation in field trials intended to foster HYV usage, drawing on data from Swaziland.  Results indicate that it is impossible to say if field trials had any effect on adoption.  Participating farms used more HYVs, but this could have been due to self-selection or the government's selection process.
Tipo: Journal Article
Palavras-chave: Teaching/Communication/Extension/Profession.
Ano: 1992
URL: http://purl.umn.edu/28854

Fighting Poverty Together: The Gambia
Provedor de dados: 20
ActionAid began operating in The Gambia in 1979. We work mainly with subsistence farmers in over 600 villages in three rural areas, shown on the map below. Groundnuts provide 85 per cent of the country’s export earnings. The main food crops are maize and rice, but poor people living in rural areas cannot produce enough food for themselves. This is due to inappropriate farming techniques, environmental degradation and natural disasters, such as drought and floods. The removal of agricultural subsidies and liberalisation of the groundnut trade in the 1980s caused increased hardship for farmers. Low levels of literacy, leading to lack of skills and slow technological progress, also cause poverty.
Tipo: Other
Palavras-chave: Rural development; Poverty; Groundnuts; Http://aims.fao.org/aos/agrovoc/c_6151; Http://aims.fao.org/aos/agrovoc/c_11368.
Ano: 2002
URL: http://hdl.handle.net/1834/687

Filtrate seaweed extract as biostimulant in nursery organic horticulture
Provedor de dados: 21
Autores: Alessandra, Trinchera; Andrea, Marcucci; Marco, Renzaglia; Elvira, Rea.
Many naturally-derived products are used as growth promoters or biostimulants on vegetables, even if their mechanisms of action are not still now completely clarified. Among them, seaweeds and seaweed products are inserted as admissible organic fertilizers in the Annex I of the Reg. (EC) No. 889/2008, even if their biostimulant properties are not recognized in organic farming.   After a previous bioassay on maize germination for defining the optimal water dilution ratios of the filtrate seaweed extract (FSE), in the present research we applied the FSE at two diluted doses to a greenhouse organic lettuce, for assessing its biostimulant effect on vegetable growth and nutrient uptake.  The greenhouse pot trials were conducted on Lactuca sativa L., by applying...
Tipo: Conference paper, poster, etc.
Palavras-chave: Vegetables.
Ano: 2014
URL: http://orgprints.org/23328/1/23328_MM.pdf

FINANCIAL AND RISK ANALYSIS OF MAIZE TECHNOLOGY IN ETHIOPIA, BASED ON CERES-MAIZE MODEL RESULTS
Provedor de dados: 31
Autores: Crawford,   Eric W.; Howard,   Julie A.; Kelly,   Valerie A.
This paper presents a financial and risk analysis of improved versus traditional maize production technology in Ethiopia, based on yields simulated with the CERES-Maize crop growth model (Schulthess and Ward, 2000). The purpose is to analyze the potential performance of the SG2000/Ministry of Agriculture program technology under less favorable meteorological conditions (rainfall level and distribution), and in areas with lower agroecological potential than those covered by the SG2000/MOA program through 1998. At the time of this study, expansion of the MOA program into lower potential zones seemed likely. Results show that use of fertilizer and improved seed is highly profitable under a variety of assumptions about crop growth conditions, maize prices, and...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2000
URL: http://purl.umn.edu/11799

FINANCIAL PROFITABILITY OF MALI-SUD BAS-FOND RICE PRODUCTION SYSTEMS
Provedor de dados: 31
Autores: Dimithe,   Georges; Bernsten,   Richard H.; Staatz,   John M.; Coulibaly,   B.S.; Mariko,   Dramane; Kergna,   Alpha O.
The high costs of rehabilitating and/or expanding government-managed irrigated schemes in Mali (Office du Niger) has prompted policy-makers and researchers to explore the potential for the underdeveloped farmer-managed bas-fond  to contribute to ensure an adequate rice supply and increase rural households' incomes.  Because little is known about nas-fond rice production in Mali, this paper analyzes its financial profitability based on data collected from a random sample of 221 farmers.  Data analysis revealed that there are numerous rice production systems in the bas-fond.  Budget analysis showed that the four most common bas-fond production systems yield higher returns than the opportunity cost of labor and they are more profitable than the main upland...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural Finance; Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/11704

Financing agricultural inputs in Northern Togo through an inventory credit system: an economic analysis of institutional response
Provedor de dados: 31
Autores: Konlambigue,   Abdou.
Agricultural intensification is widely seen as a condition sine-qua-non for enhanced food security and as a major driver for overall economic growth in sub-Saharan Africa (SSA). In this process, the financial system has an important role to play, especially to finance agricultural inputs. However in SSA, the financial institutions initiated by governments and donors have in general not lived up to the expectations, in particular not for the agricultural sector, because of inappropriate design and weaknesses in implementation. Even the microfinance institutions which were supposed to support the small-scale farmers have deflected for their goals due to the risks that the agricultural sector represents. To date, the economic research tends to concentrate on...
Tipo: Conference Paper or Presentation
Palavras-chave: Financing; Agricultural inputs; Inventory credit; Togo; Agricultural and Food Policy; Crop Production/Industries; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Livestock Production/Industries; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/52100

Firm Size Distribution and Performance of Maize and Fertilizer Traders After Market Liberalisation: Evidence from Kenya
Provedor de dados: 31
Autores: Mose,   Lawrence Obae; Burger,   Kees.
Improvement in the performance of agricultural markets was the ultimate goal of market liberalisation. In this paper, firm (trader) size distribution as a factor influencing market performance is analyzed using maize and fertilizer traders from Kenya. Firm size distribution was assessed by analyzing the normality of the distribution on volume traded. Performance was assessed by the level of competition (using Hirschman-Herfindahl index), marketing margins and marketing costs. Results show that firm size distribution for both commodities is log-normally distributed but positively skewed indicating a tendency towards smaller than larger firms. A plausible explanation is that faced with inadequate financial resources and inadequate business experience, new...
Tipo: Conference Paper or Presentation
Palavras-chave: Liberalisation; Firm size distribution; Costs; Margins; Agribusiness; International Relations/Trade; D4; L1; Q12; Q13; Q18.
Ano: 2006
URL: http://purl.umn.edu/25533

First record of Chrysoperla asoralis and C. argentina (Neuroptera: Chrysopidae) in horticultural felds of La Plata associated with the sweet pepper (Capsicum annuum L.)
Provedor de dados: 99
Autores: Haramboure,Marina; Reguilón,Carmen; Alzogaray,Raúl A.; Schneider,Marcela Inés.
Chrisopids are economically significant predators of several agricultural pests. In Argentina, the species recorded of Chrysoperla Steinmann, 1964 are C. externa (Hagen, 1861), C. asoralis (Banks, 1915), C. argentina (González Olazo &amp;amp; Reguilón, 2002) and C. defreitasi (Brooks, 1994). Chrysoperla asoralis and C. argentina have been associated with citric, olive, maize and cotton crops. In the present note, we record for the first time these two species in La Plata and neighboring areas within the Buenos Aires province, in association with the sweet pepper, Capsicum annuum L.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Chrysoperla asoralis; Chrysoperla argentina; Chrysoperla externa; Sweet pepper.
Ano: 2014
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802014000200013

First record of the genus Typhlocybella (Hemiptera: Auchenorrhyncha: Typhlocybinae: Dikraneurini) from Argentina
Provedor de dados: 99
Autores: Catalano,María I.; Paradell,Susana L.; Remes Lenicov,Ana M. M. de.
The genus Typhlocybella Baker is quoted for first time for Argentina from specimens collected on maize crops in Buenos Aires, Mendoza, Córdoba and Tucumán provinces. This contribution adds taxonomic and bioecologic knowledge about the genus as well as observations about the leaf damage produced on this crop.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cicadellidae; Typhlocybella; Maize; Argentina.
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802008000200014

FIRST REPORT OF Chalepus dorni (Coleóptera: Chrysomelidae: Cassidinae) IN MAIZE CROPS OF MINAS GERAIS, BRAZIL
Provedor de dados: 37
Autores: MARUCCI,Rosangela Cristina; Guimarães MOREIRA,Silvino; MENDES,Simone Martins.
ABSTRACT Chalepus dorni larvae were observed in commercial maize crops in the central region of the state of Minas Gerais, Brazil, during 20062007, 2008-2009 and 2010-2011 harvests. Early symptom of attack was characterized first by mines in the lower leaves of maize plants and later by the formation of necrotic areas. Although, there are reports of genus Chalepus in maize, this is the first record on the presence of C. dorni in maize in Minas Gerais, Brazil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf-mining beetle; Necrotic leaf; Zea mays.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2017000200015

First season maize performance in a long-term farming systems comparison trial at KARI-Thika, Kenya
Provedor de dados: 21
Autores: Muriuki, Anne; Musyoka, Martha; Zundel, Christine; Schulthess, F; Mwangi, K.
Kenya’s smallholder farmers contribute 65% to total agricultural output in a predominantly mixed farming system where application of inorganic fertilizers and pesticides is minimal. By contrast, agriculture in developed temperate countries is dominated by large-scale farming and heavy reliance on fertilizers and pesticides to sustain high yields. Research conducted in temperate developed countries has shown that organic farming is superior to conventional farming in resource use efficiency, ecosystem functioning, soil fertility conservation and economic performance but results cannot be transferred directly to the tropics because of disparities in climate, soils and socio-economic environments. A long-term farming systems comparisons experiment was...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2009
URL: http://orgprints.org/18374/1/muriuki%2Detal%2D2009%2Dresearch%2Dweek%2Dinternational%2Dconference.pdf

Fisiologia da planta de milho.
Provedor de dados: 14
Autores: MAGALHAES, P. C.; DURAES, F. O. M.; PAIVA, E.
bitstream/item/37497/1/circ-20.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize.; Fisiologia; Milho; Zea Mays.; Physiology.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/475778

Flooding tolerance and cell wall alterations in maize mesocotyl during hypoxia
Provedor de dados: 86
Autores: Vitorino,Patrícia Goulart; Alves,José Donizeti; Magalhães,Paulo César; Magalhães,Marcelo Murad; Lima,Luíz Carlos Oliveira; Oliveira,Luiz Edson Mota de.
This research aimed to characterize the tolerance to flooding and alterations in pectic and hemicellulose fractions from mesocotyl of maize tolerant to flooding when submitted to hypoxia. In order to characterize tolerance seeds from maize cultivars Saracura BRS-4154 and BR 107 tolerant and sensitive to low oxygen levels, respectively, were set to germinate. Plantlet survival was evaluated during five days after having been submitted to hypoxia. After fractionation with ammonium oxalate 0.5% (w/v) and KOH 2M and 4M, Saracura BRS-4154 cell wall was obtained from mesocotyl segments with different damage intensities caused by oxygen deficiency exposure. The cell wall fractions were analyzed by gel filtration and gas chromatography, and also by Infrared...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pectic substances; Hemicellulose.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000800004

FOLIAR APPLICATION OF Azospirillum brasilense AND BROADCAST NITROGEN RATES ON MAIZE OFF-SEASON
Provedor de dados: 22
Autores: Kappes, Claudinei; Silva, Rayane Gabriel da; Ferreira, Vinícius Eduardo Nunes.
The aim of this study was to evaluate the agronomic performance of maize off-season with foliar application of A. brasilense and broadcast application of N rates. The research was conducted at the Experimental Station of the MT Foundation (17° 09' S, 54° 45' W and altitude of 490 m) in Itiquira, MT, in the off-season of 2013, on a clayey Rhodic Haplustox. The experimental design was in randomized blocks with treatments in a 2 x 5 factorial arrangement (with and without the application of A. brasilense x broadcast application of N rates: 0, 30, 60, 90 and 120 kg ha-1, via urea). The applications of inoculant and N were done in the V5 stage. The sowing of hybrid DOW 2B587 Hx was held on 02/22/2013. Final plant population, prolificacy, stem diameter, plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adubação nitrogenada; Fixação biológica; Produtividade de grãos; Zea mays.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14550

Foliar copper uptake by maize plants: effects on growth and yield
Provedor de dados: 65
Autores: Barbosa,Rogério Hidalgo; Tabaldi,Luciane Almeri; Miyazaki,Fábio Rodrigo; Pilecco,Márcio; Kassab,Samir Oliveira; Bigaton,Daísa.
A slight increase in the levels of a certain nutrient can cause a significant increase in crop yield or can cause phytotoxicity symptoms. Thus, the aim of this study was to evaluate the effect of foliar application of copper (Cu) on the growth and yield of DG-501 maize. The experiment was carried out between December 2009 and April 2010 in conventional tillage. When plants were with six to eight leaves, Cu (0, 100, 200, 300, 400, 500 and 600g ha-1) was applied to the leaves. Treatments were arranged in randomized complete block with five replications. When 50% of the plants were in flowering, it was evaluated the plant height, culm diameter, height of the first ear insertion, leaf area, and chlorophyll content. At harvest, it was evaluated diameter and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilization; Micronutrient; Toxicity; Zea mays.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000900005

Foliar macronutrient levels and production of maize (Zea mays L.) after gypsum application in an Oxisol
Provedor de dados: 22
Autores: Minato, Evandro Antonio; Esper Neto, Michel; Sakurada, Rodrigo Lima; Inoue, Tadeu Takeyoshi; Batista, Marcelo Augusto.
The application of gypsum to the soil provides a favorable environment for the development of the root system, supplying the subsurface layers with elements such as calcium and sulfur and reduce the toxic aluminum activity. The objective of this study was to evaluate the influence of gypsum doses application on the maize (Zea mays L.) yield and the nutrients levels in the leaves. The study was conducted in the municipality of Terra Roxa - PR in an Oxisol using experimental design of randomized blocks with four replications. The treatment were composed of different doses of gypsum (0, 3.0, 6.0 and 9.0 t ha-1) applied after sowing corn. When the plants were in the R1 stage leaves were collected and analyzed the levels of N, P, K, Ca, Mg and S. After...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Sulfur; Plant nutrition; Yield.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14208

Follow-up of stable isotope analysis of organic  versus conventional milk
Provedor de dados: 21
Autores: Molkentin, Joachim; Giesemann, Anette.
Analysis of the stable isotope ratio of carbon (δ13C) and α-linolenic acid (C18:3ω3) content in milk fat is a useful indicator of organic milk production. Referring to corresponding measurements, further analyses of stable isotope ratios were performed in 120 samples of conventionally and organically produced whole milk collected from German retailers during a period of 18 months.  Conventional milk predominantly exhibited higher δ15N values than organic milk, the latter of which never exceeded a maximum δ15N threshold value of 5.50‰. Measurements of δ34S did not differ significantly between organic and conventional milk. Because δ13C, in general, is related to maize consumption, δ13C in milk protein and δ13C in milk fat were equally suited for...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health Consumer issues.
Ano: 2010
URL: http://orgprints.org/17760/1/Molkentin_Giesemann_ABC_398_(2010)_1493%2D1500.pdf

Fontes de crescimento da agricultura paraense - 1970/80.
Provedor de dados: 14
Autores: HOMMA, A. K. O.
bitstream/item/31891/1/CPATU-BP27.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Pará; Brasil; Economy; Mathematical model; Production; Frijol; Maize; Mallow.; Arroz; Agricultura; Economia; Feijão; Juta; Mandioca; Malva; Modelo Matemático; Milho; Produção.; Amazonia; Agriculture; Cassava; Black pepper; Jute; Rice.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380315

Fontes e modos de aplicacao de fosforo na producao e nutricao mineral do milho em primeiro cultivo.
Provedor de dados: 14
Autores: RESENDE, A. V.; FURTINI NETO, A. E.; ARAUJO, I. B.; ALVES, V. M. C.; SANTOS, J. Z. L.; VILELA, L. S.
bitstream/CPAC-2009/24157/1/p2002_42.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Phosphate fertilizers; Maize.; Adubação; Fertilizante Fosfatado; Milho; Nutriente; Zea Mays.; Fertilizer application; Nutrients.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567465

Food Aid and Biofuels: The Effects of Biofuel Policies on Procurement and Delivery
Provedor de dados: 31
Autores: Cardwell,   Ryan T.; Kerr,   William A.
The food-aid community almost unanimously condemns policies that encourage crop production for fuel.  Both food-aid donors and recipients are concerned that biofuels will increase foodgrain prices and leave donors unable to meet commitments.  The effects of biofuel-induced higher cereal prices on food-aid recipients are complicated functions of several factors, each of which must be considered in an analysis of the effects of biofuel policies.  These factors include the level of biofuel-induced price increases, changes in relative commodity prices, donor-recipient relationships and the sources from which food aid is procured.  This article analyses the effects of biofuel policies on the food-aid supply chain and concludes that the more reliant a recipient...
Tipo: Conference Paper or Presentation
Palavras-chave: Food aid; Biofuels; Development economics; Agricultural and Food Policy; Food Security and Poverty; International Development; O13; Q18; Q42.
Ano: 2009
URL: http://purl.umn.edu/51705

Food Calorie Intake and Food Security under Grain Price Inflation: Evidence from Malawi
Provedor de dados: 31
Autores: Pan,   Suwen; Fang,   Cheng; Sanogo,   Issa; Mutuc,   Maria Erlinda M.
A comprehensive analysis of food demand and nutrient consumption using recent, representative household survey data from Malawi is presented. Expenditure and price elasticities have been estimated for 20 food groups using a quadratic almost ideal demand system based on 4 income groups identified by the Goldfeld-Quandt tests. Although the current boom of maize price provides an opportunity to rethink development strategies that diversify the commodity sectors, developing countries will not necessarily benefit from this change absent significant improvements in production capacities and trade infrastructures. Malawi is likely to suffer from higher commodity prices in the short-run.
Tipo: Conference Paper or Presentation
Palavras-chave: Goldfeld-Quandt tests; A quadratic almost ideal demand system; Malawi; Agricultural and Food Policy; Consumer/Household Economics; Food Security and Poverty; D12; O13; R21; R31; Q11; Q12.
Ano: 2011
URL: http://purl.umn.edu/103266

FOOD CONSUMPTION PATTERNS IN TWO COMMUNITIES
Provedor de dados: 31
Autores: Mmakola,   D.J.; Kirsten,   Johann F.; Groenewald,   Jan A.
A survey on food consumption patterns was conducted in an urban black community and a rural black community. Urban consumers tend to consume more bread, and less maize meal than rural consumers. Urban consumers consume more meat than poverty-stricken rural dwellers. The same is true with respect to fruit and ready-made foods. Both quality and price are important considerations for consumers' food purchases, particularly rural consumers. Price appears to be less important to the higher income (&gt; R2000 per month) consumers in purchases of bread and meat, but rather important in vegetable purchases. Almost 60 per cent never consume food at away from home food establishments.
Tipo: Journal Article
Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 1997
URL: http://purl.umn.edu/54950

Food Drying/ Production Plant
Provedor de dados: 31
Autores: Kasozi,   Maria; Mwegombi,   William.
Tropical Horticulture Enterprises (T.H.E) is a Ugandan initiative that works to add value to fruits, bananas and vegetables. The main out put of this initiative are processed dried fruits, fresh fruits, banana flour and fresh vegetables. T.H.E taps the 22% of banana and fruit loss at farm gate due to failure to access markets timely, besides poor handling knowledge and poor storage facilities in rural agricultural producing areas in the country. The initiative boasts of linkage with farmers and it has a bottom up network through which farmers have benefited in various trainings. The main objective of this initiative is to improve farmer’s incomes through providing an alternative avenue and market access to foods produced and ferried to markets without any...
Tipo: Conference Paper or Presentation
Palavras-chave: Farmer; Horticulture; Markets; Uganda; Agricultural and Food Policy; Consumer/Household Economics; Food Security and Poverty; Marketing.
Ano: 2008
URL: http://purl.umn.edu/52162

FOOD INFLATION IN MALAWI: IMPLICATIONS FOR THE ECONOMY
Provedor de dados: 31
Autores: Ularo,   Khonje Makaiko Gonapanyanja.
Despite consecutive years of good harvest, Malawi has experienced continuous price escalation of staple food commodities unsolved over the time. The real price of maize in Malawi has increased by 141 percent between 1998 and 2008, and has been rising along with the food prices of many other commodities over this period. This study therefore investigates the determinants of food inflation rate in Malawi and its effect on the economy. Monthly and annual data were collected from National Statistical Office and Reserve Bank of Malawi from 1978 to 2008. Data were analyzed by estimating an error correction model (ECM). The results show that fertilizer prices, crop diversification index, maize prices, diesel prices, real exchange rates and real interest rates...
Tipo: Thesis or Dissertation
Palavras-chave: Food inflation; ECM; Crop diversification; GDP; Economy; Malawi; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.
Ano: 2010
URL: http://purl.umn.edu/117802

Food Pricing Policy and Rural Poverty: Insights from Maize in Kenya
Provedor de dados: 31
Autores: Mghenyi,   Elliot W.; Jayne,   Thomas S.
This study estimates the effects on poverty resulting from maize price changes associated with the operations of the maize marketing board in Kenya. We consider both supply and demand responses and the accompanying adjustments in rural labor markets in estimating a second order approximation to equilibrium income changes. We then use stochastic dominance techniques to generate poverty rankings between the distribution of income with the effects of the government marketing operations and the distribution of counterfactual incomes. This approach effectively addresses concerns regarding the sensitivity of poverty estimates to the type of poverty measure used. Results indicate that the price-elevating effects of government maize marketing operations have...
Tipo: Conference Paper or Presentation
Palavras-chave: Kenya; Income transfers; Maize policy; Crop Production/Industries; Food Security and Poverty; C22; O2; Q13; Q18.
Ano: 2006
URL: http://purl.umn.edu/25466

FOOD-GRAIN MARKET EVALUATION IN NICARAGUA:  THE RICE CASE
Provedor de dados: 31
Autores: Navarro,   Luis A.
Like most of the Latin American countries, Nicaragua bases its economy largely within the agricultural sector.  Throughout history, the agricultural sector of Nicaragua has followed a tortuous path, which explains in part the pattern of a slow development process and the final relationship between GDP growth and the export activity.  Long before Nicaragua's independence, maize, tobacco, sugar, and cacao represented the most important crops, in the production of which almost the entire rural population was engaged.  The period between the independence from Spain in 1821 and 1857 was characterized by a political transition, in which Nicaragua left the Central American Federation and went into the struggle between the two existing political parties, Liberals...
Tipo: Thesis or Dissertation
Palavras-chave: Agribusiness; Marketing.
Ano: 1972
URL: http://purl.umn.edu/10985

FORAGE PLANTS AND WEEDS THAT ARE SENSITIVE TO ATMOSPHERIC CLOMAZONE RESIDUALS
Provedor de dados: 87
Autores: SILVA,M.M.; SANTOS,J.B.; FERREIRA,E.A.; BRITO,O.G.; DONATO,L.M.S.; SANTOS,M.V.
ABSTRACT The use of indicator plants can be an effective alternative in monitoring the presence of toxic molecules in the air, such as herbicides. Thus, in the goal of this study is to assess the sensitivity of forage plants and weeds to atmospheric residual concentrations of clomazone. The treatments were arranged in a 6x5 factorial scheme, with the first factor corresponding to the plant species triticale (Triticosecale rimpaui), maize (Zea mays), sorghum (Sorghum bicolor), palisade grass (Urochloa brizantha), purslane (Portulaca oleracea) and signal grass (Urochloa decumbens), and the second factor to doses of 0, 90, 180, 270 and 360 g ha-1 clomazone doses (equivalent to atmospheric concentrations of 0.0, 0.05, 0.10, 0.15 and 0, 20 mg L-1). Twelve days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticosecale rimpaui Wittm.; Zea mays L.; Sorghum bicolor L.; Urochloa brizantha A. Rich; Portulaca oleracea L.; Urochloa decumbens Stapf.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100257

Förderung von arbuskulären Mykorrhizapilzen in einer Chenopodiaceae - Mais Fruchtfolge durch Untersaaten
Provedor de dados: 21
Autores: Berset, Estelle; Kaiser, Franziska; Messmer, Monika; Mäder, Paul.
Crops of the families Brassicaceae or Chenopodiaceae are non-host plants for symbiotic arbuscular mycorrhiza fungi (AMF), and thus the AMF infection potential of the soils decreases after cultivation of these crops similar to a fallow. This study aims to sustain the survival of AMF in a fodder beet (non-host) - maize cropping sequence through undersowing of different host and non-host green manure plant species (GMS). Maize served as indicator plant for potential after-effects of the GMS. As expected the AMF green manure hosts were well colonized by AMF (19 to 36%), while AMF structures in roots of the non-host GMS and beet roots were negligible. The fodder beet yield was not affected by the GMS compared to a GMS free control. Forty days after sowing of...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Crop husbandry; Soil.
Ano: 2011
URL: http://orgprints.org/17532/3/Berset_17532.pdf

Forecasting the market outlook for the South African maize and sorghum sector using econometric modeling
Provedor de dados: 31
Autores: Poonyth,   Daneswar; van Zyl,   Johan; Meyer,   Ferdinand H.
In this study, an econometric model of the South African maize and sorghum sector is estimated. Using the developed model, a market outlook for the two major grain sectors – maize and sorghum - for 1999/00 to 2006/07, is generated under the specified assumptions. Results indicate that for both maize and sorghum, consumption will gradually increase over time. In spite of varying areas of maize and sorghum being harvested, total production will also gradually increase over time due to increases in particularly yields.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries; Marketing.
Ano: 2000
URL: http://purl.umn.edu/54221

FORECASTING YIELD AND PROFITABILITY OF MAIZE CROPPING SYSTEM USING SIMULATION MODELS IN UASIN GISHU, KENYA
Provedor de dados: 31
Autores: Odwori,   P.O.; Mapelu,   M.Z.; Odhiambo,   Mark O.; Nyangweso,   P.M.
Simulation models have been used successfully to forecast productivity of cropping systems under various weather, management and policy scenarios. These models have helped farmers make efficient resource allocation decisions. However, in Kenya simulation models have not been used extensively and more specifically in modeling maize cropping system. The study aimed at forecasting productivity and profitability of maize cropping system in Uasin Gishu district, Kenya. Both primary and secondary data were used. Both time series and cross-sectional data for variables of interest were collected and complemented by a survey of 20 maize farmers who were systematically selected to verify information obtained from secondary sources. Cropping Systems simulation model...
Tipo: Conference Paper or Presentation
Palavras-chave: Forecasting; Yields; Profits; Maize cropping system; Simulation models; Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/97080

Forest fragments' contribution to the natural biological control of Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) in Maize
Provedor de dados: 52
Autores: Sousa,Eduardo Henrique Santana; Matos,Michela Costa Batista; Almeida,Ruanno Silva; Teodoro,Adenir Vieira.
The present work evaluated the influence of forest distance on predatory solitary wasps' abundance and richness and its relation to the natural biological control of the fall armyworm (Spodoptera frugiperda Smith - Lepidoptera: Noctuidae) in maize. The study consisted of two parallel lines of six experimental maize plots located at an increasing distance from a forest edge. Four trap-nests were placed in the vertices of each plot of the first line to evaluate the abundance and species richness of predatory solitary wasps. The larvae of the fall armyworm were sampled weekly by inspecting ten randomly chosen plants per plot. Predatory solitary wasp abundance (but not species richness) decreased whilst the fall armyworm abundance increased with the distance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Predatory solitary wasps; Fall armyworm; Ecosystem services; Natural biological control.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400015

Formas de fósforo em latossolo sob cultivo de milho e plantas de cobertura (2007).
Provedor de dados: 14
Autores: CARVALHO, A. M.; BUSTAMANTE, M. M. C.; PRADO, Z. A.
bitstream/item/78936/1/p2007-16.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize; Green manure.; Adubação; Solo.; Plant nutrition.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570938

Forms and accumulation of copper and zinc in a sandy typic hapludalf soil after long-term application of pig slurry and deep litter
Provedor de dados: 90
Autores: Tiecher,Tadeu Luis; Ceretta,Carlos Alberto; Comin,Jucinei José; Girotto,Eduardo; Miotto,Alcione; Moraes,Marcel Pires de; Benedet,Lucas; Ferreira,Paulo Ademar Avelar; Lorenzi,Cledimar Rogério; Couto,Rafael da Rosa; Brunetto,Gustavo.
Successive applications of pig slurry and pig deep litter may lead to an accumulation of copper (Cu) and zinc (Zn) fractions in the soil profile. The objective of this study was to evaluate the Cu and Zn forms and accumulation in a Sandy Typic Hapludalf soil after long-term application of pig slurry and deep litter. In March 2010, eight years after initiating an experiment in Braço do Norte, Santa Catarina (SC), Brazil, on a Sandy Typic Hapludalf soil, soil samples were collected from the 0-2.5, 2.5-5.0, 5-10 and 10-15 cm layers in treatments consisting of no manure application (control) and with applications of pig slurry and deep litter at two levels: the single and double rate of N requirement for maize and black oat succession. The soil was dried,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Manure; Trace elements; Chemical fractionation; Environmental contamination.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300028

Forms of phosphorus in an oxisol under different soil tillage systems and cover plants in rotation with maize
Provedor de dados: 90
Autores: Carvalho,Arminda Moreira de; Bustamante,Mercedes Maria da Cunha; Almondes,Zayra Azeredo do Prado; Figueiredo,Cícero Célio de.
Phosphorus fractions play a key role in sustaining the productivity of acid-savanna Oxisols and are influenced by tillage practices. The aim of this study was to quantify different P forms in an Oxisol (Latossolo Vermelho-Amarelo) from the central savanna region of Brazil under management systems with cover crops in maize rotation. Three cover crops (Canavalia brasiliensis, Cajanus cajan (L.), and Raphanus sativus L.) were investigated in maize rotation systems. These cover crops were compared to spontaneous vegetation. The inorganic forms NaHCO3-iP and NaOH-iP represented more than half of the total P in the samples collected at the depth of 5-10 cm during the rainy season when the maize was grown. The concentration of inorganic P of greater availability...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic matter; Available phosphorus; Phosphorus sequential fractionation; Organic phosphorus; Inorganic phosphorus.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300029

Fósforo para o milho?
Provedor de dados: 14
Autores: VASCONCELLOS, C. A.; PITTA, G. V. E.; FRANCA, G. E. de; ALVES, V. M. C.
bitstream/item/41579/1/Fosforo-milho.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Maize.; Fósforo; Milho; Nutrição; Zea Mays.; Phosphorus.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/483399

Fostering Agricultural Market Development in Zambia.
Provedor de dados: 31
Autores: Tembo,   Gelson; Chapoto,   Antony; Jayne,   Thomas S.; Weber,   Michael T.
The availability, access and affordability of food is a highly politicized issue throughout the world. In much of southern Africa, there is a widespread view that governments are responsible for ensuring that their populations have reliable access to food. Zambia, like most countries in Southern Africa, is vigorously pursuing continued direct public sector involvement and protectionist measures in the maize marketing sector. Since 1995, the Food Reserve Agency (FRA) and more recently, subsidies through the Fertilizer Support Program (FSP), have been the major instruments of government policy. While in some respects current operations undertaken by the government are similar to those adopted at independence, there are some noteworthy changes. Specifically,...
Tipo: Report
Palavras-chave: Zambia; Food security; Agriculture; Market development; Marketing; Q13.
Ano: 2009
URL: http://purl.umn.edu/54501

Framework and Initial Analyses of Fertilizer Profitability in Maize and Cotton in Zambia
Provedor de dados: 31
Autores: Donovan,   Cynthia; Damaseke,   M.; Govereh,   Jones; Simumba,   D.
Inorganic fertilizers will play a role in government programs, but whether or not a  single policy is valuable for all farmers depends upon the net gain for the farmers. The research  here seeks to demonstrate how to answer the question “Is fertilizer profitable in Zambia for  maize and cotton in the smallholder sector?” This study identifies the key components determining  profitability and then sets up a framework to evaluate the probability of farmers to obtain  profitable results with fertilizer use on maize and cotton. Several cases are selected and the  results are evaluated. Private profitability for the farmer at market prices is discussed,  leaving social profitability to other researchers. A simple method for farmers and extensionists  to use to...
Tipo: Report
Palavras-chave: Food security; Food policy; Zambia; Maize; Cotton; Fertilizer; Agribusiness; Q18.
Ano: 2002
URL: http://purl.umn.edu/54606

Framework and Initial Analyses of Fertilizer Profitability in Maize and Cotton in Zambia
Provedor de dados: 31
Autores: Donovan,   Cynthia; Damaseke,   M.; Govereh,   Jones; Simumba,   D.
The main question which this research originally sought to answer was whether or not inorganic fertilizers are generally profitable used alone on maize, or with pesticides on cotton, for small farmers in Zambia. Rather than give a definitive answer for each Zambian farmer, the authors developed a framework for analysis and applied that framework to locations with sufficient information. Using simple value/cost ratios, researchers estimated the potential profit of fertilizer for those sites. Then, using the distributions of response rates of the crops (incremental yields) found in the trials and output prices based on regional price series, the probabilities are estimated for VCRs, using a minimum of VCR of 2.0 for profitability. The results for selected...
Tipo: Report
Palavras-chave: Food security; Food policy; Maize; Cotton; Zambia; Fertilizer profitability; Crop Production/Industries; Q18.
Ano: 2000
URL: http://purl.umn.edu/54460

Free-living diazotrophs drive castor bean nitrogen input in tropical semiarid soils
Provedor de dados: 65
Autores: Fracetto,Felipe José Cury; Fracetto,Giselle Gomes Monteiro; Barros,Felipe Martins do Rêgo; Lira Junior,Mario de Andrade; Siqueira Neto,Marcos.
ABSTRACT:  There are few studies of microbial diversity in castor bean soils in tropical semiarid environmental. Castor bean products have been widely used around the world justifying the commercial importance of ricinoculture in Brazil’ northeastern semiarid. There is no fertilization or maintenance of litter on the soils from the present study, so we hypothesized that the free-living diazotrophs microorganisms drive the nitrogen (N) input into these soils. We evaluated the communities’ structure and diversity of diazotrophs in tropical semiarid soils with i-Castor bean 50 years of cultivation intercropping with maize (CB-50); ii-Only Castor bean 10 years of cultivation (CB-10) and iii-soil under Caatinga vegetation (CAA). Nitrogenase enzyme activity was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: NifH; Microorganism diversity; Ricinoculture; Caatinga dry forest.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001200252

Freijó em sistemas agroflorestais.
Provedor de dados: 14
Autores: BRIENZA JUNIOR, S.
bitstream/item/35057/1/CircTec38.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Freijo; Sistema agroflorestal; Taungya; Codia alliodora; Brasil; Brazilian walnut; Plantation; Agroforestry system; Maize; Mahogany; Growth; Crab tree.; Banana; Andiroba; Arroz; Crescimento; Cordia Goeldiana; Mandioca; Milho; Mogno; Plantio; Swietenia Macrophylla.; Amazonia; Cassava; Rice.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381965

From “May Contain” to “Does Contain”:  The price and trade effects of strict information requirements for GM maize under the Cartagena Protocol on Biosafety
Provedor de dados: 31
Autores: Bouet,   Antoine; Gruere,   Guillaume P.; Leroy,   Laetitia.
Replaced with revised version of paper 07/22/10.
Tipo: Conference Paper or Presentation
Palavras-chave: Genetically modified food; International Trade; Cartagena Protocol on Biosafety.; Agricultural and Food Policy; Environmental Economics and Policy; International Relations/Trade; Political Economy; Research and Development/Tech Change/Emerging Technologies; Q17; Q18; F18.
Ano: 2010
URL: http://purl.umn.edu/61533

From QTLs to genes controlling root traits in maize
Provedor de dados: 26
Autores: Tuberosa, R.; Salvi, S.
In maize, two major quantitative-trait loci (QTLs) on chromosome bins 1.06 and 2.04 have been shown to affect root architecture and a number of agronomic traits, including grain yield. The QTL on bin 2.04 (root-ABA1) also affects root lodging and ABA concentration in the leaf. To evaluate the effects of root-ABA1 better, near-isogenic lines (NILs) have been produced and evaluated per se and in testcross combinations under different water regimes. Additionally, the NILs have been crossed to obtain large mapping populations suitable for the fine-mapping of root-ABA1 and, eventually, its map-based cloning. The identification of the sequence responsible for a target QTL can be facilitated by the candidate-gene approach coupled with a comparative in silico...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1292

Fuel and Food Tradeoffs: A Preliminary Analysis of South African Food Consumption Patterns
Provedor de dados: 31
Autores: Mabiso,   Athur; Weatherspoon,   Dave D.
As oil prices continue to skyrocket and food riots surface across the globe, there are growing concerns that food-fuel tradeoffs are beginning to present serious challenges for food security across the world. In South Africa, where the government is embarking on a biofuels expansion strategy, understanding the nature of food-fuels tradeoffs is imperative for effective policy making and ultimately safeguarding consumers' welfare. Using time series monthly data constructed from various sources, this preliminary study makes a step toward explaining the nature of food-fuel tradeoffs in South Africa. By including fuel prices in the estimation of single-equation and seemingly unrelated regression (SUR) estimates of demands for maize meal (the South African...
Tipo: Conference Paper or Presentation
Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2008
URL: http://purl.umn.edu/6126

Função de produção da cultura do milho e do feijão para diferentes lâminas e uniformidade de aplicação de água - DOI: 10.4025/actasciagron.v26i4.1814
Provedor de dados: 1
Autores: Rezende, Roberto; UEM; Freitas, Paulo Sergio Lourenço de; UEM - Maringá; Mantovani, Everardo Chartuni; UFV; Frizzone, José Antonio; USP.
O presente trabalho teve como objetivo avaliar o efeito da uniformidade de aplicação de água na produtividade das culturas do milho e do feijão. Para a cultura do milho, os tratamentos constaram de cinco lâminas de irrigação e duas uniformidades de aplicação, uma alta (CUC &gt; 82%) e outra baixa (CUC &lt; 67%); e na do feijão, de quatro uniformidades de aplicação de água (cenário 1 CUC igual 94,1%, cenário 2 CUC igual 85,6%, cenário 3 CUC igual 65,6% e cenário 4 CUC igual 57,9%). Ajustou-se uma equação de regressão para os valores da produtividade da cultura do milho, em função da lâmina de água, para os tratamentos com alta uniformidade, enquanto para os de baixa uniformidade e para a cultura do feijão não foi possível ajuste, pois os dados de...
Palavras-chave: 5.00.00.00-4    Ciências Agrárias lâmina aplicada; Uniformidade de aplicação; Cultura do milho e do feijão 5.00.00.00-4    Ciências Agrárias.
Ano: 2004
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1814

Functional characterization of sugarcane mustang domesticated transposases and comparative diversity in sugarcane, rice, maize and sorghum
Provedor de dados: 74
Autores: Kajihara,Daniela; Godoy,Fabiana de; Hamaji,Thais Alves; Blanco,Silvia Regina; Van Sluys,Marie-Anne; Rossi,Magdalena.
Transposable elements (TEs) account for a large portion of plant genomes, particularly in grasses, in which they correspond to 50%-80% of the genomic content. TEs have recently been shown to be a source of new genes and new regulatory networks. The most striking contribution of TEs is referred as “molecular domestication”, by which the element coding sequence loses its movement capacity and acquires cellular function. Recently, domesticated transposases known as mustang and derived from the Mutator element have been described in sugarcane. In order to improve our understanding of the function of these proteins, we identified mustang genes from Sorghum bicolor and Zea mays and performed a phenetic analysis to assess the diversity and evolutionary history of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Domesticated tranposases; Saccharum sp.; Sorghum bicolor; Transposable elements; Zea mays.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000400014

Fungal population and diversity in organically amended agricultural soils of Meghalaya, India
Provedor de dados: 21
Autores: Swer, H; Dkhar, MS; Kayang, H.
The effect of different organic fertilisers (farm yard manure [FYM]; vermicompost [VC]; plant compost [PC] and integrated compost [INT], i.e. a combination of FYM, VC and PC in a 1:1:1 ratio) on the population and diversity of soil fungi was investigated in a maize-French bean trial. Fungal populations were much higher in organically fertilised plots as compared to the control (CTRL) and showed a decreasing trend in the order FYM&gt;PC&gt;INT&gt;VC&gt;CTRL. Altogether, 122 fungal species and two sterile mycelia were isolated from all the plots of which 25 fungal genera belonged to Deuteromycotina, seven to Ascomycotina, four to Zygomycotina and one to Mastigomycotina. The most common genera isolated from all the plots include Penicillium, Aspergillus,...
Tipo: Journal paper
Palavras-chave: Soil biology; Composting and manuring.
Ano: 2011
URL: http://orgprints.org/19269/4/19269.pdf

Fusarium species and fumonisins associated with maize kernels produced in Rio Grande do Sul State for the 2008/09 and 2009/10 growing seasons
Provedor de dados: 58
Autores: Stumpf,R.; Santos,J. dos; Gomes,L.B.; Silva,C.N.; Tessmann,D.J.; Ferreira,F.D.; Machinski Junior,M.; Del Ponte,E.M.
Ear rots caused by Fusarium spp. are among the main fungal diseases that contribute to poor quality and the contamination of maize grains with mycotoxins. This study aimed to determine the visual incidence of fungal-damaged kernels (FDKs), the incidence of two main Gibberella (a teleomorph of Fusarium) complexes (G. fujikuroi and G. zeae) associated with maize using a seed health blotter test, and the fumonisin levels, using high performance liquid chromatography, in samples of maize grains grown across 23 municipalities during the 2008/09 and 2009/10 growing seasons. Additionally, 104 strains that were representative of all of the analysed samples were identified to species using PCR assays. The mean FDK was seven per cent, and only six of the samples had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium graminearum; Fusarium verticillioides; Fumonisins; Zea mays L.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100012

Fusarium wilt incidence and common bean yield according to the preceding crop and the soil tillage system
Provedor de dados: 86
Autores: Toledo‑Souza,Eliane Divina de; Silveira,Pedro Marques da; Café‑Filho,Adalberto Corrêa; Lobo Junior,Murillo.
The objective of this work was to evaluate the effects of preceding crops and tillage systems on the incidence of Fusarium wilt (Fusarium oxysporum f. sp. phaseoli) and common bean (Phaseolus vulgaris) yield. The cultivar BRS Valente was cultivated under center‑pivot irrigation in the winter seasons of 2003, 2004 and 2005, after several preceding crops established in the summer seasons. Preceding crops included the legumes Cajanus cajan (pigeon pea), Stylosanthes guianensis, and Crotalaria spectabilis; the grasses Pennisetum glaucum (millet), Sorghum bicolor (forage sorghum), Panicum maximum, and Urochloa brizantha; and a consortium of maize (Zea mays) and U. brizantha (Santa Fé system). Experiments followed a strip‑plot design, with four replicates....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium oxysporum; Phaseolus vulgaris; Crop‑livestock integration; Crop rotation; No‑tillage; Soilborne pathogen.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000800002

Futterwert von Mais-Bohnen-Silagen: Stangen- und  Feuerbohnen im Vergleich
Provedor de dados: 21
Autores: Aulrich, Karen; Meyer, Ulrike; Fischer, Jenny; Böhm, Herwart.
Maize for silage is a major forage source for dairy cows with its high energy density, but the protein concentration is low. Therefore intercropping systems with maize and  climbing beans, which have the potential to improve the protein- and energy supply from regional grown roughage, were investigated since 2014 in field experiments. Four cultivars of Phaseolus vulgaris and two cultivars of P. coccineus were evaluated for their potential in  intercropping with maize and their crude nutrient contents were evaluated in comparison with maize. Furthermore defined mixtures of two cultivars of P. vulgaris and two cultivars of P. coccineus with maize were produced to assess their  digestibility in sheep. All intercrop silages (IS) had higher crude protein values...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Root crops.
Ano: 2017
URL: http://orgprints.org/31840/1/Futterwert%20von%20Mais-Bohnen-Silagen%20Stangen-%20und.pdf

Futuras fuentes de crecimiento de la productividad del trigo en la region del Bajío (Guanajuato, Mexico)
Provedor de dados: 31
Autores: Aquino-Mercado,   Pedro.
El objetivo de esta investigación es determinar la perspectiva de la producción de trigo en la región del Bajío (Guanajuato, México), como una zona estratégica para proveer la materia prima que requiere la industria molinera de la zona centro del país. Se determinó el comportamiento de los componentes de la producción mediante el cálculo de las tasas de crecimiento. Asimismo, se elaboró un diagnóstico de la situación actual de la productividad, para lo cual se realizó una encuesta en una muestra representativa de los productores de la región. Para determinar las fuentes de inestabilidad del ingreso del productor, se utilizó el análisis de medidas de variación (coeficientes de variación, varianzas y covarianzas). Se modeló una función de producción del tipo...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/7681

Future prospects of corn and sorghum production in Thailand
Provedor de dados: 106
Autores: Somnuk Sriplung.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Production; Yields; Marketing; Prices; Exports; ข้าวโพด; ข้าวฟ่าง; การผลิต; ประเทศไทย.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3815

Gaps and Opportunities for Agricultural Sector Development in Mozambique
Provedor de dados: 31
Autores: Bias,   Calisto; Donovan,   Cynthia.
Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambique
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Food policy; Mozambique; Agricultural development; Food Security and Poverty; Q18.
Ano: 2003
URL: http://purl.umn.edu/56058

Gas exchanges and growth of maize as affected by aeration porosity and soil compaction
Provedor de dados: 124
Autores: Silva,Francisca Gleiciane da; Assis Junior,Raimundo Nonato de; Mesquita,Rosilene Oliveira; Marques,Edilaine da Silva; Mota,Jaedson Cláudio Anunciato.
ABSTRACT Based on the hypothesis that less than 10% aeration porosity is sufficient to ensure plant development, the objective of this study was to evaluate the effect of levels of aeration porosity and soil density on the gas exchange and growth of maize plants. The experiment was conducted in a greenhouse, in randomized blocks in a 2 × 5 factorial arrangement: two densities (1.6 and 1.7 Mg m-3) and five aeration porosities (0.07, 0.08, 0.09, 0.10 and 0.12 m3 m-3), with five replicates. The interaction between the factors did not have an effect on the analyzed variables. Aeration porosity had a significant effect on photosynthesis, stomatal conductance, relative chlorophyll index (SPAD), plant height and biomass production, whose data were fitted by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil aeration; Physical quality; Ecophysiology; Zea mays L.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300403

Gemengeanbau von Mais mit Phaseolus-Bohnen: Einfluss von Sorte und Saatdichte der Bohnen auf die Bestandszusammensetzung
Provedor de dados: 21
Autores: Fischer, Jenny; Höppner, Frank; Böhm, Herwart.
Vor dem Hintergrund, dass eine nachhaltige Proteinversorgung landwirtschaftlicher Nutztiere zukünftig verstärkt mit betrieblich oder regional erzeugten Futtermitteln erfolgen soll, bietet der Mais-Bohnen-Gemengeanbau, insbesondere für den Ökologischen Landbau, einige Vorteile. Während Silomais, aufgrund der hohen Energiedichte und der guten Silierfähigkeit ein wichtiges Grundfuttermittel darstellt, müssen die geringen Proteingehalte in der Maissilage, durch eiweißreiche Futterkomponenten ergänzt werden. Durch den Gemengeanbau von Silomais mit rankenden Phaseolus-Bohnen besteht dagegen die Möglichkeit, ein silierfähiges und energiereiches Futtermittel zu gewinnen, das gegenüber der reinen Maissilage einen höheren Proteingehalt aufweist und in einem...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds.
Ano: 2015
URL: http://orgprints.org/29591/1/Fischer-etal_2015_PflaTag-Poster_Mais-Bohne-Ertrag.pdf

Gene stacking as a strategy to confer characteristics of agronomic importance in plants by genetic engineering
Provedor de dados: 65
Autores: Ceccon,Cássia Canzi; Caverzan,Andréia; Margis,Rogerio; Salvadori,José Roberto; Grando,Magali Ferrari.
ABSTRACT: Gene stacking refers to the introduction of two or more transgenes of agronomic interest in the same plant. The main methods for genetically engineering plants with gene stacking involve (i) the simultaneous introduction, by the co-transformation process, and (ii) the sequential introduction of genes using the re-transformation processes or the sexual crossing between separate transgenic events. In general, the choice of the best method varies according to the species of interest and the availability of genetic constructions and preexisting transgenic events. We also present here the use of minichromosome technology as a potential future gene stacking technology. The purpose of this review was to discuss aspects related to the methodology for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Co-transformation; Re-transformation; Sexual crossing; Transgene; Minichromosomes.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000600401

General Equilibrium Effects in the South African Maize Market: International Trade Simulations
Provedor de dados: 31
Autores: van Schoor,   Melt.
Following deregulation in the 1990's the South African maize producing industry has been suffering a gradual decline. Current low prices suggest that this trend may continue or worsen. This paper discusses the results from a static general equilibrium model for the South African economy to evaluate the effects on the economy. The analysis covers summer cereals producing agricultural regions, production in other sectors in the economy, commodity markets and the economy at large. Additionally, the effects on factors, households and the government are analysed. The first set of experiments is aimed to evaluate the effects of an increase in import tariffs on summer cereals. The results indicate that under normal conditions South Africa will experience little...
Tipo: Working or Discussion Paper
Palavras-chave: International Relations/Trade.
Ano: 2005
URL: http://purl.umn.edu/15632

Generating Global Crop Distribution Maps: From Census to Grid
Provedor de dados: 31
Autores: You,   Liangzhi; Wood,   Stanley; Wood-Sichra,   Ulrike.
In order to evaluate food security, technology potential and the environmental impacts of production in a strategic and regional context, it is critical to have reliable information on the spatial distribution and coincidence of people, agricultural production, and environmental services. This paper proposes a spatial allocation model for generating highly disaggregated, crop-specific production data by a triangulation of any and all relevant background and partial information. This includes national or sub-national crop production statistics, satellite data on land cover, maps of irrigated areas, biophysical crop suitability assessments, population density, secondary data on irrigation and rainfed production systems, cropping intensity, and crop prices....
Tipo: Conference Paper or Presentation
Palavras-chave: Global; Cross entropy; Satellite image; Spatial allocation; Agricultural production; Crop suitability; Crop Production/Industries; C6; Q15; Q24.
Ano: 2006
URL: http://purl.umn.edu/25737

Generating global crop distribution maps: from census to grid
Provedor de dados: 31
Autores: You,   Liangzhi; Wood,   Stanley; Wood-Sichra,   Ulrike.
In order to evaluate food security, technology potential and the environmental impacts of production in a strategic and regional context, it is critical to have reliable information on the spatial distribution and coincidence of people, agricultural production, and environmental services. This paper proposes a spatial allocation model for generating highly disaggregated, crop-specific production data by a triangulation of any and all relevant background and partial information. This includes national or sub-national crop production statistics, satellite data on land cover, maps of irrigated areas, biophysical crop suitability assessments, population density, secondary data on irrigation and rainfed production systems, cropping intensity, and crop prices....
Tipo: Conference Paper or Presentation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2006
URL: http://purl.umn.edu/21299

Generating Plausible Crop Distribution and Performance Maps for Sub-Saharan Africa Using a Spatially Disaggregated Data Fusion and Optimization Approach
Provedor de dados: 31
Autores: You,   Liangzhi; Wood,   Stanley; Wood-Sichra,   Ulrike.
Agricultural production statistics reported at country or sub-national geopolitical scales are used in a wide range of economic analyses, and spatially explicit (geo-referenced) production data are increasingly needed to support improved approaches to the planning and implementation of agricultural development. However, it is extremely challenging to compile and maintain collections of sub-national crop production data, particularly for poorer regions of the world. Large gaps exist in our knowledge of the current geographic distribution and spatial patterns of crop performance, and these gaps are unlikely to be filled in the near future. Regardless, the spatial scale of many sub-national statistical reporting units remains too coarse to capture the...
Tipo: Working or Discussion Paper
Palavras-chave: Sub-Saharan Africa; Cross-entropy; Satellite image; Spatial allocation; Agricultural production; Crop suitability; Crop Production/Industries.
Ano: 2007
URL: http://purl.umn.edu/42374

GENERATING PLAUSIBLE CROP DISTRIBUTION MAPS FOR SUB-SAHARA AFRICA USING SPATIAL ALLOCATION MODEL
Provedor de dados: 31
Autores: You,   Liangzhi; Wood,   Stanley; Wood-Sichra,   Ulrike.
Spatial data, which are data that include the coordinates (either by latitude/longitude or by other addressing methods) on the surface of the earth, are essential for agricultural development. As fundamental parameters for agriculture policy research agricultural production statistics by geopolitical units such as country or sub-national entities have been used in many econometric analyses. However, collecting sub-national data is quite difficult in particular for developing countries. Even with great effort and only on regional scales, enormous data gaps exist and are unlikely to be filled. On the other hand, the spatial scale of even the subnational unit is relatively large for detailed spatial analysis. To fill these spatial data gaps we proposed a...
Tipo: Conference Paper or Presentation
Palavras-chave: Sub-Sahara Africa; Cross entropy; Satellite image; Spatial allocation; Agricultural production; Crop suitability; Crop Production/Industries; C60; Q15; Q24.
Ano: 2004
URL: http://purl.umn.edu/19965

Genetic analysis of adult-plant resistance to leaf rust in a double haploid wheat (Triticum aestivum L. em Thell) population
Provedor de dados: 74
Autores: Brammer,Sandra Patussi; Fernandes,Maria Irene Baggio de Moraes; Barcellos,Amarilis Labes; Milach,Sandra Cristina Kothe.
A genetic analysis of adult plant resistance to leaf rust (Puccinia triticina) was performed in in vitro obtained double haploid progenies from a cross between the Brazilian wheat cultivar Trigo BR 35, which, under the high inoculum pressure of the southern region, has been resistant to leaf rust for more than 12 years, and the susceptible cultivar IAC 13-Lorena. Haplodiploidization via in vitro gimnogenesis was done by somatic elimination of the pollen donor genome after maize pollination of the F1 plants. The advantages and usefulness of double haploids (DH) for genetic analysis of complex inherited traits like durable adult-plant resistance to wheat leaf rust were evident: it was possible to analyze inheritance patterns in this cross by using only the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Puccinia triticina; Resistant genes; Haplodiploidization.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000300020

Genetic analysis of grain yield of maize as manifested in diverse varietal populations and their crosses
Provedor de dados: 106
Autores: Shehata, A.H.; Dhawan, N.L.; Salama, S.I.
5 tables
Palavras-chave: Corn; Maize; Genetic analysis; Grain yield; Varieties; ข้าวโพด; การวิเคราะห์ทางพันธุกรรม; ผลผลิต; ประชากร.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3898

Genetic and metabolic diversity of pink-pigmented facultative methylotrophs in phyllosphere of tropical plants
Provedor de dados: 58
Autores: Balachandar,D.; Raja,P.; Sundaram,SP.
Diversity of Pink-Pigmented Facultative Methylotrophs (PPFMs) in phyllosphere of cotton, maize and sunflower was determined based on differential carbon-substrate utilization profile and Random Amplified Polymorphic DNA data. Results indicate that six diversified groups of PPFMs are found in these crops. Sunflower and maize phyllosphere harbor four different groups of methylobacteria while cotton has only two groups.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diversity; Methylobacterium; Phyllosphere; PPFM; RAPD.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000100017

Genetic Change in Farmer-Recycled Maize Seed: A Review of the Evidence
Provedor de dados: 31
Autores: Morris,   Michael L.; Risopoulos,   Jean; Beck,   David.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1999
URL: http://purl.umn.edu/7683

Genetic control of aluminum tolerance in tropical maize germplasm
Provedor de dados: 53
Autores: Coelho,Caroline de Jesus; Bombardelli,Renato Gustavo Hoffmann; Schulze,Guilherme Stalchmidt; Caires,Eduardo Fávero; Matiello,Rodrigo Rodrigues.
ABSTRACT Aluminum (Al) toxicity is the most limiting factor to maize crop productivity in acid soils. Therefore, the understanding of inheritance of Al tolerance in maize is important for the developmentof more adequate procedures for Al tolerant genotypes selection. In this sense, the objectives of this study were to determine the inheritance, and the general (GCA) and specific combining ability (SCA) for Al tolerance in tropical maize. First, we evaluated diallel crosses of maize from landrace and hybrid germplasms for Al tolerance through the minimal solution methodology. The DIF data (root growth difference) were analyzed by Griffing diallel model. Later the additive-dominant genetic model proposed by Mather and Jinks (1971) was used to estimate the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Combining ability; Heritability; Inheritance; Zea mays L.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000100071

Genetic control of disease resistance in corn
Provedor de dados: 106
Autores: Renfro, B.L.
Palavras-chave: Corn; Maize; Genetic control; Plant breeding; Disease resistance; Seedling diseases; Stalk rot; Ear rots; Foliar diseases; Rusts; Smuts; Downy mildew; Bacterial diseases; Viruses; Mycoplasma-like diseases; ข้าวโพด; การถ่ายทอดสู่รุ่นลูก; เชื้อโรค; โรคราน้ำค้าง; โรคใบไหม้; โรคราสนิม; ไวรัส; โรคลำต้นเน่า; แบคทีเรีย; โรคราเขม่าดำ; โรคที่ติดมากับเมล็ด; โรคลำต้นเน่า; โรคฝักเน่า; โรคทางใบ.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3952

Genetic control of grain yield and nitrogen use efficiency in tropical maize
Provedor de dados: 86
Autores: Souza,Leandro Vagno de; Miranda,Glauco Vieira; Galvão,João Carlos Cardoso; Eckert,Fernando Roberto; Mantovani,Éder Eduardo; Lima,Rodrigo Oliveira; Guimarães,Lauro José Moreira.
The objectives of this work were to study the genetic control of grain yield (GY) and nitrogen (N) use efficiency (NUE, grain yield/N applied) and its primary components, N uptake efficiency (NUpE, N uptake/N applied) and N utilization efficiency (NUtE, grain yield/N uptake), in maize grown in environments with high and low N availability. Experiments with 31 maize genotypes (28 hybrid crosses and three controls) were carried out in soils with high and low N rates, in the southeast of the state of Minas Gerais, Brazil. There was a reduction of 23.2% in average GY for maize grown in soil with low N, in comparison to that obtained with high N. There were 26.5, 199 and 400% increases in NUtE, NUpE, and NUE, respectively, for maize grown with low N. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Abiotic stress; Absorption efficiency; Combining ability; Commercial hybrids; Utilization efficiency.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008001100010

Genetic control of traits associated with phosphorus use efficiency in maize by REML/BLUP
Provedor de dados: 124
Autores: DoVale,Júlio César; Fritsche-Neto,Roberto.
The improvement phosphorus use efficiency (PUE) allows to reach satisfactory yields with lower costs. A breeding strategy for PUE is to increase its components, the phosphorus acquisiton efficiency (PAE) and phosphorus utilization efficiency (PUtE). Thus, this study aimed to identify: i) the relative importance of the components of PUE, in high and low phosphorus; ii) the relationship of root system length and shoot dry mass (SDM) with PUE and its components and; iii) the genetic control of traits associated with the PUE. Forty-one hybrid combinations were evaluated in two experimental environments representing contrasting conditions of availability of phosphorus: low (LP) and high (HP). A randomized block design with two replications were used in simple...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Genic effect; Abiotic stress; Mixed Models.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000300018

Genetic correlation between traits in the ESALQ-PB1 maize population divergently selected for tassel size and ear height
Provedor de dados: 63
Autores: Farias Neto,Austeclínio Lopes; Miranda Filho,José Branco de.
Full-sib and selfed (S1) progenies were obtained from sub-populations of ESALQ-PB1, divergently selected for tassel size (T+ and T-) and ear height (E+ and E-), and used for estimating genetic and phenotypic correlation coefficients between traits. The analyzed traits were: EW- total ear weight (g/plant), PH- plant height (cm), EH- ear height (cm), TB- tassel branch number and TL- tassel length. The highest genetic (rG) and phenotypic (rF) correlation was observed for the combination PH x EH, as expected, with average of 0.800 and 0.778, respectively over sub-populations and locations. It is apparent that divergent selection for tassel size did not affect greatly the correlation between PH and EH in the full sib progenies, but in the inbred progenies the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Genetic correlation; Divergent selection; Tassel size; Ear height.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000100018

Genetic distance estimated by RAPD markers and its relationship with hybrid performance in maize
Provedor de dados: 86
Autores: Bruel,Daniela Cristina; Carpentieri-Pípolo,Valéria; Gerage,Antonio Carlos; Fonseca Júnior,Nelson da Silva; Prete,Cássio Egídio Cavenaghi; Ruas,Claudete de Fátima; Ruas,Paulo Maurício; Souza,Silvia Graciele Hülse de; Garbuglio,Deoclécio Domingos.
The objective of this work was to evaluate the genetic diversity of 16 maize inbred lines, and to determine the correlation between genetic distance and hybrid performance, using random amplified polymorphic DNA (RAPD) molecular markers. Twenty-two different random primers were used, which resulted in the amplification of 265 fragments, 237 (84.44%) of them being polymorphic. A genetic similarity matrix was created from the RAPD data, using Jaccard coefficient, and a dendrogram was constructed. Hybrid analyses were carried out using random block design and Griffing method VI for diallel crossings. The genetic associations showed five distinct heterotic groups. Correlations between genetic divergences detected by RAPD, as well as the means observed in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Diallel; Heterotic patterns; Molecular markers.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006001000006

Genetic divergence among maize hybrids and correlations with heterosis and combining ability - doi: 10.4025/actasciagron.v34i1.11979
Provedor de dados: 1
Autores: Oliboni, Rodrigo; Universidade Estadual do Centro Oeste - UNICENTRO; Faria, Marcos Ventura; Universidade Estadual do Centro Oeste - UNICENTRO; Neumann, Mikael; Universidade Estadual do Centro Oeste - UNICENTRO; Battistelli, Guilherme Mendes; Universidade Estadual do Centro Oeste - UNICENTRO; Tegoni, Rafael Gallo; Universidade Estadual do Centro Oeste - UNICENTRO; Resende, Juliano Tadeu Vilela de; Universidade Estadual do Centro Oeste - UNICENTRO.
Twelve corn hybrids recommended for cropping in the south-central region of the Paraná State and 66 crossings obtained among these hybrids were evaluated for agronomic and morphological traits. These genotypes were evaluated in three experiments performed in Laranjeiras do Sul, Guarapuava and Cantagalo, Paraná State, Brazil. Heterosis and specific combining ability (SCA) were estimated for yield of husked ears. Data from measuring 22 morphological/agronomical traits of the parents were subjected to a multivariate joint analysis of variance and cluster analysis to group the parental hybrids via the neighbor method, using the generalized Mahalanobis distance. Pearson correlation coefficients between heterosis, SCA, D2 and yield of husked ears were obtained....
Tipo: Fieldwork
Palavras-chave: 5.01.03.05-9 Zea mays; Specific combining ability; Mahalanobis distance; Plant breeding Melhoramento Vegetal Zea mays; Specific combining ability; Mahalanobis distance; Plant breeding Melhoramento Vegetal.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/11979

Genetic divergence among maize hybrids by morphological descriptors
Provedor de dados: 53
Autores: Rigon,João Paulo Gonsiorkiewicz; Capuani,Silvia; Rigon,Carlos Alberto Gonsiorkiewicz.
Two experiments with 25 maize commercial hybrids were carried out in a direct sowing system in Southern Brazil in the harvests of 2009/2010 and 2010/2011. Quantitative descriptors were used with the objective of determining the genetic divergence and the relative contributions of traits among hybrids for extraction of inbred lines. This study was carried out in Oxisol soil using a randomized block design with four replicates. Data were subjected to combined analysis of variance, and based on the multivariate analyses, Tocher and average linkage (UPGMA) cluster analyses, based on generalized distance of Mahalanobis, to quantify divergence in addition to Singh criterion to validate trait with the most contribution. The multivariate methods were consistent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Divergence quantitative descriptors; Multivariate analyses; Zea mays.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000200156

Genetic diversity among maize (Zea mays L.) landraces assessed by RAPD markers
Provedor de dados: 74
Autores: Carvalho,Valdemar P.; Ruas,Claudete F.; Ferreira,Josué M.; Moreira,Rosângela M.P.; Ruas,Paulo M.
The genetic relationships among 81 maize accessions consisting 79 landraces and two improved varieties, maintained by farmers in southern Brazil were investigated using Random Amplified Polymorphic DNA (RAPD). Thirty-two highly informative primers amplified 255 markers of which 184 (72.2%) were polymorphics. Based on the RAPD markers, a dendrogram was constructed using the UPGMA method. The range of genetic similarity was from 0.78 to 0.91. The molecular data grouped the accessions into two main clusters, which were correlated according to kernel colors. Small clusters were seen associated to characteristics, such as kernel morphology. The analysis of the molecular data revealed that maize management adopted by small-scale farmers has contributed to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn landrace; Genetic variability; Molecular genetic markers; RAPD.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000200017

Genetic diversity and structure of native maize races from Northwestern Mexico
Provedor de dados: 86
Autores: Vega-Alvarez,Isrrael; Santacruz-Varela,Amalio; Rocandio-Rodríguez,Mario; Córdova-Téllez,Leobigildo; López-Sánchez,Higinio; Muñoz-Orozco,Abel; Hernández-Bautista,Aurelio.
Abstract: The objective of this work was to evaluate the genetic diversity of nine maize races (Zea mays ssp. mays) from Northwestern Mexico and one population of teosinte of the Balsas race (Zea mays ssp. parviglumis). A total of 649 alleles were identified, with an average of 20.9 alleles per locus using 31 microsatellite loci; 84.3% of them were polymorphic loci with a 0.49 expected heterozygosity. Graphic representation of principal coordinate analysis (PCoA) showed broad variation and population distribution. The highest probabilistic value obtained with the ΔK criterion confirmed the existence of five population groups clustered by the Bayesian model. This grouping coincided with the population distribution observed in the PCoA graph. Maize races...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Conservation strategies; Landraces; Microsatellites; Plant breeding.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101023

Genetic diversity assessed by microsatellite markers in sweet corn cultivars
Provedor de dados: 63
Autores: Lopes,Ana Daniela; Scapim,Carlos Alberto; Machado,Maria de Fátima Pires da Silva; Mangolin,Claudete Aparecida; Silva,Tereza Aparecida; Cantagali,Liriana Belizário; Teixeira,Flávia França; Mora,Freddy.
Information on genetic diversity is essential to the characterization and utilization of germplasm. The genetic diversity of twenty-two sweet corn cultivars (seventeen open-pollinated varieties, OPV, and five hybrids, H) was investigated by applying simple sequence repeat markers. A total of 257 primers were tested, of which 160 were found to be usable in terms of high reproducibility for all the samples tested; 45 were polymorphic loci, of which 30 were used to assess the genetic diversity of sweet corn cultivars. We detected a total of 86 alleles using 30 microsatellite primers. The mean polymorphism was 82 %. The highest heterozygosity values (Ho = 0.20) were found in the PR030-Doce Flor da Serra and BR427 III OPVs, whereas the lowest values (0.14) were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Simple sequence repeats; Neighbor-joining; Maize germplasm.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000600513

Genetic diversity, population structure and AFLP markers associated with maize reaction to southern rust
Provedor de dados: 53
Autores: Giordani,Willian; Scapim,Carlos Alberto; Ruas,Paulo Maurício; Ruas,Claudete de Fátima; Contreras-Soto,Rodrigo; Coan,Marlon; Fonseca,Inês Cristina de Batista; Gonçalves,Leandro Simões Azeredo.
ABSTRACT Maize is one of the species with greater genetic diversity among cereals and possibly the most diverse crop species known. Accessing this variability is essential for maize breeding, allowing breeders to achieve progress of yield increasing, overcome environmental challenges or deal with pests and diseases. Among the maize diseases, southern rust is one of the most important, causing significant losses in yield and presenting severe epidemics worldwide. In the present study, the AFLP technique was applied to analyze population structure and genetic diversity among 145 tropical maize inbred lines, and to test for preliminary evidence of association between AFLP markers and the reaction to southern rust. Disease severity was evaluated in two crop...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Gwas; Association studies; Cluster analysis; Genetic distance; Puccinia polysora.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200183

Genetic effects for maize traits in acid and non-acid soils
Provedor de dados: 74
Autores: Pérez Velásquez,Juan C.; Souza Jr.,Cláudio Lopes de; Narro,Luis A.; Pandey,Shivaji; De León,Carlos.
Breeding programs for acid-soil tolerance are desirable as a relatively inexpensive and permanent way for increasing maize (Zea mays L.) yield on these soils. Our objective was to compare the genetic effects controlling the expression of maize traits in acid and non-acid soils. Seven related and one unrelated inbred lines, with different levels of tolerance to acid soil, and their F1, F2, BC1, and BC2 generations were evaluated in four acid and two non-acid soils. Estimates of additive, dominance, and epistatic effects were computed for grain yield, plant height, days to mid-silk, and prolificacy, using the generation means analysis procedure. For all traits the major part of the variation was accounted for by additive and dominance effects, with dominance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acid soils; Additive; Dominant; Epistatic effects; Generation analysis.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100017

GENETIC ENGINEERING AND TRADE: PANACEA OR DILEMMA FOR DEVELOPING COUNTRIES?
Provedor de dados: 31
Autores: Nielsen,   Chantal Pohl; Robinson,   Sherman; Thierfelder,   Karen.
Advocates of the use of genetic engineering techniques in agriculture contend that this new biotechnology promises increased productivity, better use of natural resources and more nutritious foods. Opponents, on the other hand, are concerned about potentially adverse implications for the environment and food safety. In response to consumer reactions against genetically modified (GM) foods in some countries - particularly in Western Europe - crop production is being segregated into GM and non-GM varieties. This paper investigates how such changes in the maize and soybean sectors may affect international trade patterns, with particular attention given to different groups of developing countries.
Tipo: Working or Discussion Paper
Palavras-chave: International Relations/Trade; Research and Development/Tech Change/Emerging Technologies.
Ano: 2000
URL: http://purl.umn.edu/16272

Genetic improvement of silage maize: predicting genetic gain using selection indexes and best linear unbiased prediction
Provedor de dados: 124
Autores: Crevelari,Jocarla Ambrosim; Pereira,Messias Gonzaga; Azevedo,Flávio Henrique Vidal; Vieira,Ricardo Augusto Mendonça.
ABSTRACT The objective of this study was to evaluate four selection indexes and best linear unbiased prediction (BLUP) for predicting genetic gain in maize hybrids used for silage. The genetic gain was compared between four selection indexes and BLUP. Nineteen topcross hybrids and five controls were evaluated using a completely randomized block design with four replicates in two areas located in Campos dos Goytacazes and Itaocara, Rio de Janeiro, Brazil, in the growing season 2013-2014. Plant height, first ear height, average stem diameter, grain yield at the silage stage, and green mass yield were evaluated. The genetic gain was predicted using the selection indexes proposed by Pesek and Baker, Smith and Hazel, Mulamba and Mock, Willians, and BLUP. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Topcrosses; Tester; Hybrids; Yield.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200197

Genetic parameter estimates and identification of superior white maize populations
Provedor de dados: 1
Autores: Rovaris, Sara Regina Silvestrin; Oliveira, André Luís Bombonato de; Sawazaki, Eduardo; Gallo, Paulo Boller; Paterniani, Maria Elisa Ayres Guidetti Zagatto.
In Brazil, there is a shortage of white maize cultivars and genetic studies for special maize breeding programs. This study aimed to identify populations and promising hybrid white maize for main agronomic traits and grits processing and to estimate the genetic parameters of parents and heterosis. In the 2012/13 growing season, fifteen hybrids were obtained by complete diallel crosses, and six parental and commercial check varieties were evaluated for: female flowering (FF), ear height (EH), grain yield (GY), ear length (EL), volumetric mass (VM) and grits processing (GP) in two locations in São Paulo State, Campinas and Mococa, using a randomized block design. Analyses of variance were carried out, and diallel crosses were performed using the Gardner and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Complete diallel; Gardner and Eberhart; Grits production. Melhoramento genético de plantas.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32517

Genetic Parameters and Predictive Genetic Gain in Maize with Modified Recurrent Selection Method
Provedor de dados: 117
Autores: Afonso Doná,Anderson; Vieira Miranda,Glauco; Oliveira DeLima,Rodrigo; Gonçalves Chaves,Luciana; Gomes e Gama,Elto Eugênio.
The modified recurrent selection method suggests a less productive population to test the other population more productive and itself aiming to have more genetic gains than tradition recurrent selection method that uses one population to test the other one. The objectives of this work were to estimate the genetic components, to predict and to evaluate the genetic gains of the SynFlint and Syndent populations of maize (Zea mays L.), applying a modified recurrent selection method. Two recombination cycles were carried out, with 144 Si progeny per cycle. These progenies were test crossed with SynFlint, generating a SynFlint x Syndent inter-population and a SynFlint x SynFlint intra-population. The progenies were evaluated in five environments in the first...
Tipo: Journal article
Palavras-chave: Breeding methods; Genetic variability.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100006

Genetic progress, adaptability and stability of maize cultivars for value of cultivation and use trials
Provedor de dados: 1
Autores: Uate, Joaquim Vicente; Nunvuga, Joel Jorge; Silva, Carlos Pereira da; Guimarães, Lauro Jose Moreira; Pinho, Renzo Garcia Von; Balestre, Marcio.
Maize breeding programs conduct multi-environment trials every year to assess the performance of new cultivars in pre-releasing tests. The data are combined across sites and seasons to perform a joint analysis in order to obtain information that will help breeders to select the best cultivars for different environments. Beyond this, it is essential to understand the different factors that can hamper the selection and genetic progress (i.e., genetic variability, selection intensity and genotype-by-environment interactions). In this study, the genetic progress (GP) was estimated and the adaptability and stability of 81 maize genotypes were evaluated in a series of trials for the value of cultivation and use (VCU) between the 2010/11 and 2014/15 growing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mixed model; Genetic gain; Biplot.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42624

Genetic progress, adaptability and stability of maize cultivars for value of cultivation and use trials
Provedor de dados: 1
Autores: Uate, Joaquim Vicente; Nunvuga, Joel Jorge; Silva, Carlos Pereira da; Guimarães, Lauro Jose Moreira; Pinho, Renzo Garcia Von; Balestre, Marcio.
Maize breeding programs conduct multi-environment trials every year to assess the performance of new cultivars in pre-releasing tests. The data are combined across sites and seasons to perform a joint analysis in order to obtain information that will help breeders to select the best cultivars for different environments. Beyond this, it is essential to understand the different factors that can hamper the selection and genetic progress (i.e., genetic variability, selection intensity and genotype-by-environment interactions). In this study, the genetic progress (GP) was estimated and the adaptability and stability of 81 maize genotypes were evaluated in a series of trials for the value of cultivation and use (VCU) between the 2010/11 and 2014/15 growing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mixed model; Genetic gain; Biplot.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42624

Genetic purity certificate in seeds of hybrid maize using molecular markers
Provedor de dados: 95
Autores: Salgado,Kalinka Carla Padovani de Carvalho; Vieira,das Graças Guimarães Carvalho; Von Pinho,Édila Vilela de Resende; Guimarães,Cláudia Teixeira; Von Pinho,Renzo Garcia; Souza,Lourenço Viana de.
One of the main features that confer high quality to the seed is its genetic purity, in which one of the major causes of contamination is the self-pollination of the female parent. Up to date, there is no accurate and fast methods for detecting such contamination. Thus, this work was carried out to certify the genetic purity in seeds of hybrid maize using different biochemical and DNA-based markers. Two single-cross hybrids and their parental lines derived from the maize breeding program at UFLA were evaluated by isoenzymatic pattern of alcohol dehydrogenase (ADH), esterase (EST), acid phosphatase (ACP), glutamate-oxaloacetate transaminase (GOT), malate dehydrogenase (MDH), isocitrate dehydrogenase (IDH), phosphoglucomutase (PGM), 6-phosphoglucomate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Microsatellites markers; Isoenzymatic markers.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222006000100024

Genetic responses of traits relationship to components of nitrogen and phosphorus use efficiency in maize - doi: 10.4025/actasciagron.v35i1.15237
Provedor de dados: 1
Autores: DoVale, Júlio César; Universidade Federal de Viçosa; Maia, Ciro; Universidade Federal de Viçosa; Fritsche-Neto, Roberto; Universidade Federal de Viçosa; Miranda, Glauco Vieira; Universidade Federal de Viçosa; Cavatte, Paulo Cézar; Universidade Federal de Viçosa.
This study had three objectives: i) to observe maize inbred lines response to nitrogen (N) and phosphorus (P) acquisition as well as their utilization efficiencies and traits of root morphology in contrasting levels of these nutrients, ii) to study the relationship between root morphology and nutrient use efficiencies for both nutrients, and iii) to identify contrasting parents with components N and P use efficiency for an inheritance study. We evaluated 15 inbred lines in two experiments conducted in contrasting conditions of N and P. We evaluated the shoot, root traits and nutritional efficiencies and observed the genetic variability for most traits. Selection can be practiced for most of these traits in specific environments. Under conditions of...
Tipo: Pesquisa
Palavras-chave: Agronomia; Melhoramento Vegetal Zea mays; Acquisition and utilization efficiencies; Root morphology; Abiotic stress; REML/BLUP Genética e melhoramento de plantas Zea mays; Acquisition and utilization efficiencies; Root morphology; Abioticstress; REML/BLUP.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15237

Genetic transformation of Brachiaria brizantha cv. Marandu by biolistics
Provedor de dados: 42
Autores: CABRAL,GLAUCIA B.; CARNEIRO,VERA T.C.; GOMES,ANA CRISTINA M.M.; LACERDA,ANA LUIZA; MARTINELLI,ADRIANA P.; DUSI,DIVA M.A.
ABSTRACT Brachiaria brizantha is a forage grass well adapted to tropical areas and cultivated in millions of hectares in Brazil. The apomictic mode of reproduction in this species, in addition to differences in ploidy between sexual and apomictic plants, impairs crossbreeding. The development of a methodology to transform apomictic cultivars will provide an option to introduce agronomic important traits to B. brizantha cv. Marandu. In addition, it will open the possibility to study in vivo the function of candidate genes involved in the apomictic reproduction. The objective of this work was to evaluate peeled seeds, isolated embryo from mature seeds, embryogenic calluses and embryogenic cell suspensions, as target explant for genetic transformation via...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage; Gus; HptII; Hygromycin.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401789

Genetic transformation of the Brazilian BR 451 maize variety by the Agrobacterium tumefaciens method
Provedor de dados: 65
Autores: Silva,Marilia Rodrigues de; Didoné,Dielli Aparecida; Ceccon,Cássia Canzi; Almeida,Vinícius de Oliveira; Grando,Magali Ferrari.
ABSTRACT: The asexually gene introduction by genetic engineering has brought enormous possibilities to innovate plant breeding. However, principally because of the low in vitro response, genetic transformation has been restricted to only certain genotypes of agronomically significant species. With the objective of establishing a protocol for genetically transforming the Brazilian BR 451 maize variety through Agrobacterium tumefaciens, it was studied the capacity of plant regeneration in vitro from embryogenic calli cultivated in three regeneration media, each having different growth regulators. It was also evaluated the temperature stress effect on the transformation of the immature embryos with A. tumefaciens EHA 101 containing the plasmid pTF102 with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: In vitro regeneration; Temperature stress; EHA 101; PTF102; Zea mays.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001100151

Genetic variability and inheritance to aluminum tolerance in nutrient solution in triticale
Provedor de dados: 53
Autores: Silva,Allan Henrique; Paterniani,Maria Elisa Ayres Guidetti Zagatto; Camargo,Carlos Eduardo de Oliveira.
Triticale has shown different behavior to aluminum toxicity (A1(3+)) when applied nutrient solution. This study had the objective of evaluating 19 triticale lines inserted at International Maize and Wheat Improvement Center (CIMMYT), IAC-5 cultivar and two control cultivars of wheat in the presence of 0, 3, 6, 9, 12 and 15 mg L- 1 of Al3+. Afterwards, four genotypes being two tolerant and two sensitive were chosen to obtain the F1's, F2's, RC1's and RC2's generations, in all possible crossing. The seedlings were submitted to 6 mg L- 1 of Al3+ and analyzed later on (tolerant and sensitive) by the chi-square method. The root growth was also obtained to estimate the genetic parameters involved in the character control. The trials were carried out in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: X triticosecale Wittmack; Genotypes; Genetic inheritance and genetic parameters.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000100002

Genetic variability for carotenoid content of grains in a composite maize population
Provedor de dados: 63
Autores: Kist,Volmir; Albino,Vanessa Stainbach; Maraschin,Marcelo; Ogliari,Juliana Bernardi.
Local maize (Zea mays L.) varieties are cultivated by small-scale farmers in western Santa Catarina (SC) State, in southern Brazil. These small areas frequently present many problems related to biotic and non-biotic stresses, which have limited the economic output and income of the farmers. Production from local varieties for human consumption would be an alternative way of improving income and stimulating on farm conservation. The genetic variability of the total carotenoid content (TCC) of kernels in a local maize population was evaluated for their economic exploitation potential as biofortified food. Two independent samples of 96 half-sib families (HSF) plus four checks were evaluated in two groups of experiments in western SC and each one was carried...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofortified food; Convergent-divergent selection; Genetic-statistical parameters; Genotype by environment interaction.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000600006

Genetic variability in maize and teosinte populations estimated by microsatellites markers
Provedor de dados: 65
Autores: Terra,Tatiana de Freitas; Wiethölter,Paula; Almeida,Cícero Carlos de Souza; Silva,Sérgio Delmar dos Anjos e; Bered,Fernanda; Sereno,Maria Jane Cruz de Melo; Barbosa Neto,José Fernandes.
Wild species are important sources of genetic variability and may be exploited by breeding programs. Crosses between teosinte and maize occur freely and teosinte serves as genetic source of agronomic traits for introduction in maize. The objective of this study was to estimate genetic variability among and within maize and teosinte populations (Zea mays mexicana). Two sweet maize populations (BR400 and BR402), two common maize populations (Suwan and Pampa) and one teosinte population were analyzed using microsatellites markers. Results indicated that 64,5% of the variation was detected within the populations, suggesting the possibility of obtaining genetic progress by selection within each population. The analysis with 25 microsatellites loci enabled the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays mays; Zea mays mexicana; Genetic diversity; Flooding tolerance; Molecular markers.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000200003

Genetic variability of Brazilian phytoplasma and spiroplasma isolated from maize plants
Provedor de dados: 86
Autores: Gomes,Eliane Aparecida; Jardim,Sílvia Neto; Guimarães,Claudia Teixeira; Souza,Isabel Regina Prazeres de; Oliveira,Elizabeth de.
The objective of this work was to characterize the genetic variability of phytoplasma and Spiroplasma kunkelii isolated from maize plants showing symptoms of stunt collected from different Brazilian geographic regions. A DNA fragment of 500 base pairs (bp) was amplified from the spiralin gene in S. kunkelii and one fragment of 1,200 bp was generated from 16S rDNA gene in phytoplasma. The partial sequences of the spiralin gene showed similarity of 98% among the isolates of S. kunkelii analyzed. These sequences were compared with the sequence of the spiralin gene from other Spiroplasma species deposited in the GenBank, resulting in a similarity varying from 76.9% to 88.1%. The 16S rDNA sequence from the phytoplasma were completely similar within the...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Zea mays; Microorganisms; Spiralin; Mollicutes; Genetic polymorphism; Gene sequence.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000100009

Genetic variance and covariance components  related to intra- and interpopulation  recurrent selection in maize (Zea mays L.)
Provedor de dados: 74
Autores: Arias,Carlos Alberto Arrabal; Souza Júnior,Cláudio Lopes de.
New genetic variance and covariance components related to intra- and interpopulational recurrent selection methods have been theoretically developed by Souza Jr. (Rev. Bras. Genet. 16: 91-105, 1993) to explain the failure of these methods to concomitantly develop hybrid and per se populations. Intra- and interpopulation half-sib progenies of 100 genotypes were sampled from maize (Zea mays L.) populations BR-106 and BR-105 to estimate variance and covariance components and to compare the expected responses to reciprocal (RRS), intrapopulational (HSS), and modified (MRS) recurrent selection in interpopulation hybrid, populations per se, and to determine heterosis. Four sets of 100 progenies, two intra- and two interpopulational, were evaluated in partially...
Tipo: Info:eu-repo/semantics/article
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571998000400022

Genetic variation among pathogens causing "Helminthosporium" diseases of rice, maize and wheat
Provedor de dados: 102
Autores: WEIKERT-OLIVEIRA,RITA C. B.; RESENDE,M. APARECIDA DE; VALÉRIO,HENRIQUE M.; CALIGIORNE,RACHEL B.; PAIVA,EDILSON.
Twenty isolates of four fungal species, agents of "Helminthosporium" diseases in cereals, were collected from different regions: nine Bipolarisoryzae isolated from rice (Oryza sativa), seven B.sorokiniana from wheat (Triticum aestivum), two B. maydis, and two Exserohilumturcicum from maize (Zea mays). The strains were compared by PCR-RFLP and RAPD analysis. Size polymorphism among the isolates in the ITS region comprising the 5.8 S rDNA indicated genetic differences among the isolates, while a UPGMA phenogram constructed after the digestion of this region with restriction enzymes showed inter- and intra-specific polymorphism. The RAPD profiles indicated an expressive level of polymorphism among different species, compared with a low level of polymorphism...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bipolaris sorokiniana; Bipolaris oryzae; Bipolaris maydis; Exserohilum turcicum; PCR-RFLP; RAPD.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000600015

Genetic variation for nutrient use efficiency in maize under different tillage and fertilization regimes with special emphasis to plant microbe interaction
Provedor de dados: 21
Autores: Messmer, M.; Berner, A.; Krauss, M.; Jansa, J.; Presterl, Th.; Schmidt, W.; Mäder, P.
Conservation tillage (no-till and reduced tillage) brings many benefits with respect to soil fertility and energy use, but it also has drawbacks regarding the need for synthetic fertilizers and herbicides. To promote conversation tillage in organic farming systems, crop rotation, fertilization and weed control have to be optimized. In addition, crop varieties are needed with improved nutrient use efficiency (NUE) and high weed competitiveness or tolerance.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Soil tillage; Weed management.
Ano: 2010
URL: http://orgprints.org/18931/1/Messmer-etal-2011-NUE-AMF-Eucarpia-printed.pdf

Genetic variation of acid phosphatase-1 activity in maize
Provedor de dados: 106
Autores: Efron, Yoel.
4 tables
Palavras-chave: Corn; Maize; Genetic variation; Acid phosphatase-1; ข้าวโพด; ความแปรปรวนทางพันธุกรรม.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3897

Genética de la resistencia al complejo Phyllachora maydis Maubl., Monographella maydis Müller &amp; Samuels y Coniothyrium phyllachorae Maubl., en diversos genotipos de maíz (Zea mays L.).
Provedor de dados: 32
Autores: Hernández Ramos, Lervin.
El complejo de la mancha de asfalto del maíz, inducido por los hongos Phyllachora maydis y Monographella maydis, es una enfermedad de importancia económica en México y Centroamérica, debido a que provoca severas pérdidas en el rendimiento y deteriora la calidad del forraje. El mejoramiento genético de la resistencia del hospedante a través de la generación de genotipos resistentes representa la medida de control más eficiente para el control de la enfermedad. Se conoce poco respecto a la base genética de la resistencia al CMA, por lo cual se determinó la Aptitud Combinatoria General (ACG) y Aptitud Combinatoria Especifica (ACE) de 18 líneas endogámicas S7 mediante el Modelo I de frecuencias fijas de Griffing, bajo el Método II que incluyó las 18 líneas más...
Palavras-chave: Phyllachora maydis; Zea mays L.; Resistencia a enfermedades; Herencia de la resistencia; Análisis dialélico; ACG; ACE; Disease resistance; Inheritance of resistance; Diallel analysis; GCA; SCA; Fitopatología; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2318

Genetically Modified Food and International Trade: The Case of India, Bangladesh, Indonesia, and the Philippines
Provedor de dados: 31
Autores: Gruere,   Guillaume P.; Bouet,   Antoine; Mevel,   Simon.
Genetically modified (GM) food crops have the potential to raise agricultural productivity in Asian countries, but they are also associated with the risk of market access losses in sensitive importing countries. We study the potential effects of introducing GM food crops in Bangladesh, India, Indonesia, and the Philippines in the presence of trade-related regulations of GM food in major importers. We focus on GM field crops (rice, wheat, maize, soybeans, and cotton) resistant to biotic and abiotic stresses, such as drought-resistant rice, and use a multi-country, multi-sector computable general equilibrium model. We build on previous international simulation models by improving the representation of the productivity shocks associated with GM crops, and by...
Tipo: Working or Discussion Paper
Palavras-chave: Genetically modified food; International trade; Segregation; Asia; International Relations/Trade.
Ano: 2007
URL: http://purl.umn.edu/42359

Genetically Modified Food and International Trade: The Case of India, Bangladesh, Indonesia and the Philippines
Provedor de dados: 31
Autores: Gruere,   Guillaume P.; Bouet,   Antoine; Mevel,   Simon.
Replaced with revised version of paper 07/27/07.
Tipo: Conference Paper or Presentation
Palavras-chave: International Relations/Trade; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007
URL: http://purl.umn.edu/9917

Genetically modified maize: exploring consumer acceptance
Provedor de dados: 31
Autores: Batrinou,   Anthimia M.; Sinanoglou,   Vasilia; Gogkou,   Antigoni; Sakellaris,   George.
Recent EU regulations have imposed mandatory labelling of all food products that consist of or contain genetically modified organisms (GMOs). Labelling should state that "this product contains genetically modified organisms". This study examines how different label messages may affect the attitude of consumers in tasting a specific food product (corn chip) derived from maize presented with five different labels ("organic corn", "conventional corn", "product that contains genetically modified corn", "product that contains genetically modified corn approved by EU", "non- classified corn"). Results of 100 Greek young students show that the label claiming that the product contains genetically modified corn, evokes a deeply rooted negative attitude as more than...
Tipo: Conference Paper or Presentation
Palavras-chave: Consumer/Household Economics; Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/10055

Genetics and breeding for the improvement of yield and quality of corn
Provedor de dados: 106
Autores: Tawatchai Prasatsrisupab; Prapa Sripichitt; Weerasak Duangchantra; Anek Silapapun; Manop Subsorn; Sansern Jampatong; Patcharee Konghiran.
70 tables
Palavras-chave: Corn; Maize; Plant breeding; Genetics; Hybrids; Variety trials; Yields; Quality; Agronomic characters; Downy mildew; Disease resistance; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4044

Genetics and statistical association between lethal alleles and quantitative yield factors in maize (Zea mays l.)
Provedor de dados: 46
Autores: Salerno,Juan Carlos; Kandus,Mariana; Boggio Ronceros,R.; Sorarrain,O.; González,Cecilia; Almorza,David.
The objective of this work is to study the genetic process related to the hybrid vigour (heterosis) and the identification of quantitative trait loci (QTL) in maize. A biometric model was built using the mathematical formalism relating to the discrete absorbent Markov chain in canonical form, in order to analyse the evolution of chromosome segments, with recessive lethal genes linked with grain yield factors through generations. The grain yield obtained from an inbred maize line regulated by a balanced lethal system, and other lines without this system as control, were evaluated during five inbreeding generations. The use of the Markov chain theory for the study of evolution during these generations was a different approach of the classical mathematical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Lethal alleles; Heterosis; Markov Chains; QTL.
Ano: 2007
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332007000100003

Genome dynamics, genetic complexity and macroevolution
Provedor de dados: 97
Autores: GALLARDO,MILTON.
Genome data analysis indicates that the major evolutionary transitions have been driven by substantial increases in genomic complexity. These increases, accounting for novelty in evolution, have proceeded mainly by gene duplication. This idea, advanced by &lt;A HREF="#OHNO"&gt;Ohno (1968)&lt;/A&gt;, remains current in the study of several organisms whose genomes have been sequenced. Maize, yeast, and humans contain more paralogons than would be expected to occur by chance, and this supports the contention that gene families were not formed de novo, but by large-scale DNA duplications. Lineage hybridization emerges as an efficient and widespread mechanism to create evolutionary novelty by recruiting redundant genes to new roles. Lateral gene transfer...
Tipo: Journal article
Palavras-chave: Gene duplication; Genome; Genetics; Evolution; Macroevolution; Evolutionary theory.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000400013

Genome-Wide Selection for tropical maize root traits under conditions of nitrogen and phosphorus stress - doi: 10.4025/actasciagron.v34i4.15884
Provedor de dados: 1
Autores: Fritsche-Neto, Roberto; Universidade Federal de Viçosa; DoVale, Júlio César; Universidade Federal de Viçosa; Lanes, Éder Cristian Malta de; Universidade Federal de Viçosa; Resende, Marcos Deon Vilela de; Embrapa Florestas; Miranda, Glauco Vieira; Universidade Federal de Viçosa.
The objective of this study was to verify the accuracy of the Genome-Wide Selection (GWS) method in tropical maize breeding for root traits under conditions of nitrogen and phosphorus stress. Forty-one single-crosses were evaluated in two experiments. The first experiment considered low nitrogen availability, and the second experiment considered low phosphorus availability. A randomized block design with two replicates was used. The lateral and axial root lengths were measured using WinRhizo software. The analysis of deviance was calculated using the Restricted Maximum Likelihood/Best Linear Unbiased Prediction (REML/BLUP) method. Eighty microsatellite markers were used to genotype the estimation population. The Random Regression method was used to analyze...
Tipo: Pesquisa Empírica de Campo
Palavras-chave: 5.01.03.05-9 marker-assisted selection; Recurrent selection; Abiotic stresses Melhoramento vegetal marker-assisted selection; Recurrent selection; Abiotic stresses.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15884

Genotype x management interaction for nutrient use efficiency (NUE) of maize varieties tested under different tillage and fertilization regimes
Provedor de dados: 21
Autores: Messmer, Monika; Uehlinger, Noemi; Berner, Alfred; Scholberg, Johannes; Mäder, Paul.
Most varieties have been selected under high input conditions, including seed treatment, herbicide applications, as well as optimal levels of fast releasing fertilizers. Under organic farming nutrient release is dependent on the temperature and biological activity of the soil and its interaction with the declining residues from previous crops and applied quantity of farmyard manure. As a consequence it is not always possible to match nutrient release with crop demand over time. This effect is even more severe under conservation tillage. To promote conservation tillage in organic farming, it is necessary to identify cultivars that show high nutrient use efficiency (NUE) under these conditions. While there is substantial evidence that breeding for low N...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil tillage Soil Breeding; Genetics and propagation Root crops.
Ano: 2013
URL: http://orgprints.org/26561/7/messmer-etal-2013-Eucarpia-Conference-GenotypeXmanagement_interaction_for_NUE_of_maize.pdf

Geostatistical analysis of crop yield maps in a long term no tillage system
Provedor de dados: 53
Autores: Guedes Filho,Osvaldo; Vieira,Sidney Rosa; Chiba,Marcio Koiti; Grego,Célia Regina.
It is known, for a long time, that crop yields are not uniform at the field. In some places, it is possible to distinguish sites with both low and high yields even within the same area. This work aimed to evaluate the spatial and temporal variability of some crop yields and to identify potential zones for site specific management in an area under no-tillage system for 23 years. Data were analyzed from a 3.42 ha long term experimental area at the Centro Experimental Central of the Instituto Agronômico, located in Campinas, Sao Paulo State, Brazil. The crop yield data evaluated included the following crops: soybean, maize, lablab and triticale, and all of them were cultivated since 1985 and sampled at a regular grid of 302 points. Data were normalized and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spatial variability; Cross semivariogram; Management zones.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500003

Geração de mapas de produtividade para experimentos com milho no âmbito de fazenda.
Provedor de dados: 14
Autores: SHIRATSUCHI, L. S.
ABSTRACT: Many farmers do not use precision agriculture tools due to high equipment costs and lack of knowledge about this new approach. A number of farmers have, however, conducted on-farm experiments without the help of these new and still expensive tools. One of most important equipments for precision agriculture practices is the crop yield monitor. It can also be used for on-farm experiments to collect yield data, reducing costs and paybacks. The aim of this paper is to evaluate the effects of combine header distance on corn harvest accuracy of yield maps. Conventional yield map was statistically compared with five maps generated by removing 2, 4, 6, 8 e 10 combine header width generated by a GIS-based software package. Two interpolations were made, i....
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Interpolação; Precision farming; Maize; Interpolation; Productivity.; Agricultura de Precisão; Mapa; Milho; Produtividade; Zea Mays.; Cartography.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568680

Germinación de esclerocios y formación de ascosporas de Claviceps gigantea.
Provedor de dados: 32
Autores: Moreno Manzano, Celeste Elizabeth.
La germinación de esclerocios de C. gigantea se evaluó en diferentes sustratos (avena, carbón comercial, carbón residual y tierra) bajo condiciones de laboratorio. Se compararon las condiciones, el tiempo de germinación y formación de estructuras sexuales con las de campo. La variación en tamaño y profundidad de colocación de los esclerocios colectados en el periódo noviembre-diciembre 2012, no mostraron diferencia en la germinación. Los resultados mostraron que existen diferencias altamente significativas (p &lt;.0001) cuando los esclerocios se colocaron sobre carbón residual en el que se obtuvo 55% de germinación de esclerocios, mientras que en los otros substratos no hubo germinación. En laboratorio, la germinación inició seis meses después de...
Palavras-chave: Fitopatología; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2273

Getting More “Bang for the Buck”: Diversifying Subsidies Beyond Fertilizer and Policy Beyond Subsidies
Provedor de dados: 31
Autores: Burke,   William J.; Jayne,   Thomas S.; Black,   J. Roy.
Input subsidies are the single greatest expenditure under poverty reduction programs in Zambia. Yet maize yields continue to fall well short of international standards. One major reason appears to be the yield limiting effects of acidity, which is highly common on Zambian soils. We suggest a diversification of the input subsidy scheme beyond fertilizer to include inputs that reduce acidity and raise the yield response to fertilizer application. We further discuss specific recommendations for diversifying productivity investments to put more emphasis on extension and agronomic research.
Tipo: Technical Report
Palavras-chave: Food Security; Food Policy; Marketing; Agribusiness; Agricultural and Food Policy; Food Security and Poverty; Marketing.
Ano: 2012
URL: http://purl.umn.edu/123209

GETTING TECHNOLOGY AND THE TECHNOLOGY ENVIRONMENT RIGHT: LESSONS FROM MAIZE DEVELOPMENT IN SOUTHERN AFRICA
Provedor de dados: 31
Autores: Howard,   Julie A.; Rubey,   Lawrence; Crawford,   Eric W.
This paper examines two questions: (1) what were the most important factors that led to differential rates of adoption of maize technology by farmers in Zimbabwe, Zambia, and Malawi from 1910 to 1995? and (2) what do these experiences suggest about strategic investments in institutions and organizations needed to create a sustainable environment for technology development and adoption in the future?  The analysis suggests that productivity increases are facilitated by (a) technology innovations throughout the agricultural system, (b) integration of technological innovations with changes in policies, organizations, human capital and infrastructure related to extension, input and output markets and processing services, and (c) coordination of these...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2000
URL: http://purl.umn.edu/11558

GHG Trading Framework for the U.S. Biofuels Sector
Provedor de dados: 31
Autores: Kumarappan,   Subbu; Joshi,   Satish V.
Substitution of petroleum fuels with biofuels such as ethanol and biodiesel has been shown to reduce greenhouse gas (GHG) emissions. These GHG reductions can be traded in the emerging carbon markets, and methodologies for quantifying and trading are still being developed. The main challenges in developing such GHG trading framework are analyzed. An outline of such a framework is presented that depends on the life cycle assessment of GHG reductions, along with a combination of project specific and regional standard performance measures. The advantages of assigning GHG property and trading rights to biofuel producers are discussed. At carbon prices of $10 per metric ton, estimated additional revenues to biofuel producers range from $ 17 to 64 million dollars...
Tipo: Conference Paper or Presentation
Palavras-chave: Biofuels; Ethanol; Biodiesel; Carbon trading; GHG emissions trading; Methodology; CCX; CDM; Maize; Lignocellulosics; Well to wheel; Life cycle analysis; Environmental Economics and Policy; Q42; D23; D4.
Ano: 2008
URL: http://purl.umn.edu/54530

GLI ANTICHI MAIS DEL PIEMONTE
Provedor de dados: 21
Autores: PINNA, MASSIMO; VERONA, MARZIA; BALDI, CLAUDIO; FURFARI, GIUSEPPINA; GAMBA, URSULA; SPAGNOLO, SANDRA; ZEPPA, GIUSEPPE; ROLLE, LUCA.
Il libro descrive le caratteristiche agronomiche ma anche culturali della coltivazione del mais effettuata in Piemonte nel secolo scorso, nonchè le possibilità di valorizzazione e di miglioramento delle cultivar tradizionali destinate all'alimentazione umana ed il loro ruolo nella tutela della biodiversità rurale. Nel libro si descrive inoltre il lavoro attuato dal CRAB (Centro di riferimento per l'Agricoltura Biologica, Provincia di Torino) per il recupero e la caratterizzazione delle cultivar locali di mais, che ha portato alla costituzione di un associazione di produttori e alla formazione di un gruppo di "agricoltori custodi" per la coltivazione in purezza delle sementi di queste antiche varietà maidicole.
Tipo: Book
Palavras-chave: Cereals; Pulses and oilseeds Biodiversity and ecosystem services Social aspects.
Ano: 2004
URL: http://orgprints.org/6821/1/pubblic_mais_piemontesi.pdf

Gliricidia sepium: leguminosa promissora para regiões semi-áridas.
Provedor de dados: 14
Autores: CARVALHO FILHO, O. M. de; DRUMOND, M. A.; LANGUIDEY, P. H.
Requerimentos de clima e solo; estabelecimento; usos; consorcio palma x gliricidia x milho/feijao; bancos de proteina; cercas vivas forrageiras; conservacao de forragem; palatabilidade; valor nutritivo.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Consorciação; Palma; Maize; Bean; Hedges.; Pastagem; Feijão; Forragem; Gliricidia; Milho; Palmae; Planta Para Cerca Viva.; Gliricidia sepium; Forage; Intercropping.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131682

Glucose mineralization in soils of contrasting textures under application of S-metolachlor, terbuthylazine, and mesotrione, alone and in a mixture
Provedor de dados: 53
Autores: Mendes,Kassio Ferreira; Collegari,Stella Andressa; Pimpinato,Rodrigo Floriano; Tornisielo,Valdemar Luiz.
ABSTRACT Microbial adaptation may occur in surface soils under agricultural uses exposed to herbicides. However, little is known about herbicide mixture effects in the soil, especially in tropical regions like Brazil. The aim of this study was to evaluate glucose mineralization in soils of contrasting textures (sandy clay and sandy loam) from areas cultivated with maize under application of S-metolachlor, terbuthylazine and mesotrione, alone and in a mixture. The methodology was established according to the soil microorganisms: carbon transformation test with 14C-glucose solution (D-[U-14C] glucose) in biometric flasks. After the addition of 14C-glucose, the amount of 14C in cumulative CO2 of microbial respiration was measured several times during the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial respiration; Tropical condition; Herbicides.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000100152

Glycerol inclusion levels in corn and sunflower silages
Provedor de dados: 64
Autores: Martins,Adriana de Souza; Oliveira,Juliane Ribeiro de; Lederer,Marili Lopes; Moletta,José Luís; Galetto,Shivelly Los; Pedrosa,Victor Breno.
Due to the seasonal cycle of forage, the use of silage to feed animals provides nutrients throughout the year. However, its quality can be improved with the inclusion of additives and other products. Glycerol is a rich source of energy and present a high efficiency of utilization by animals. The purpose of this work was to evaluate the effect of glycerol inclusion on the chemical and fermentation characteristics of corn and sunflower silages. Two silage sources (maize and sunflower) were used and four levels of glycerol inclusion (0, 15, 30 and 45%) based on dry matter were carried out. The experimental design was completely randomized in a 2 x 4 factorial arrangement with five replications. The pH values and chemical composition of corn and sunflower...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crude glycerin; Biofuels; Dry matter; Fermentation quality; Conserved forage.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000500009

Glyphosate Herbicide Use in Urochloa brizantha Management in Intercropping With Herbicide-Resistant Maize
Provedor de dados: 87
Autores: SILVA,D.V.; FREITAS,M.A.M.; SOUZA,M.F.; QUEIROZ,G.P.; MELO,C.A.D.; SILVA,A.A.; FERREIRA,L.R.; REIS,M.R.
The success of the intercropping among cultivated species depends on the adoption of practices that provide, in due course, greater competitive ability of a species over another. The objective of this study was to evaluate the use of glyphosate herbicide in the suppression of Brachiaria (signalgrass) intercropped with maize. The experiment was conducted in a randomized complete block design with four replications. The treatments were arranged in a 5 x 2 + 2 factorial arrangement, the first factor corresponding to the doses of glyphosate (48, 96, 144, 240, 480 g ha-1 of the acid equivalent (a.e)) and the second one to the vegetative stages of the signalgrass at the time of application (2 and 4 tillers). Two controls were added to the treatment list,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Urochloa brizantha; Crop-livestock integration.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100133

Glyphosate Mineralization: Effect of Temperature and Soybean and Corn Crop Residues
Provedor de dados: 117
Autores: Rampoldi,Ariel; Hang,Susana; Barriuso,Enrique.
Mineralization is the main mechanism of dissipation of glyphosate herbicide (N-[phosphonomethyl] glycine) in soil. However, there is scarce information about the mineralization process in strata formed by stubbles in no-tillage systems. The kinetics and rate of mineralization of herbicide in stubbles of soybean (Glycine max L. Merr.) and corn (Zea mays L.) were investigated. To evaluate the effect of age of crop residues, samples of soybean stubbles were collected immediately after harvest (Soja 1) and four months after harvest (Soja 2). Corn crop residues were collected three months after harvest. Glyphosate evolution and total microbial activity (TMA) were monitored by release of 14C-CO2 and C-CO2 under laboratory conditions with two temperatures, 15 and...
Tipo: Journal article
Palavras-chave: Glyphosate; Stubbles; Mineralization; Non-tillage system; Total microbial activity.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100002

GOVERNMENT MARKET INTERVENTION: AN ECONOMETRIC STUDY OF TANZANIAN FOOD GRAIN MARKETS
Provedor de dados: 31
Autores: Gerrard,   Chris; Roe,   Terry L.
The paper is organized into six major sections. Background and trends in agricultural production and trade are presented in Section II. The extent of government intervention in food grain production and trade is described in Section III. This provides a foundation for Section IV where the behavioral equations for defining government intervention in food grain markets are specified. These equations, along with the retail demand and farm level supply equations, yield six equations in six endogenous variables for each of the food grain crops, maize, wheat and rice. It is shown in Section V that the model provides a good fit to the data. In the concluding sections, simulations are performed to obtain insights into the effect on and motivation for government...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy.
Ano: 1981
URL: http://purl.umn.edu/13813

GRAAL: Growth, Architecture, ALlocation: a functional-structural model to analyse the interactions between growth and assimilates allocation integrating processes from organ to whole plant
Provedor de dados: 26
Autores: Drouet, J.L.; Pagès, L.
An integrated functional-structural model, called GRAAL, has been developed to simulate and analyse the interactions between morphogenetic processes and assimilate partitioning during the vegetative development of individual plants. GRAAL associates models of plant morphogenesis and models simulating the growth of plant compartments as related to assimilate availability. Using objectoriented methods, knowledge is formalized at the organ level (i.e., local rules of development and functioning). The behaviour of the plant arises from interactions between the organs and the integration of the processes within the whole plant. Shoot and root organs are initiated as a function of temperature. Using the source–sink concept, organ growth is calculated from its...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1380

Gradiente de concentração de nutrientes no perfil e acidez em subsuperfície do solo sob sistema plantio direto consolidado: o que fazer?
Provedor de dados: 14
Autores: DE BONA, F. D.
Resumo: O surgimento de alterações químicas como o gradiente de concentração de nutrientes e a acidez em subsuperfície de solos manejados a médio ou longo tempo sob sistema plantio direto tem causado preocupação aos técnicos e produtores rurais. O presente trabalho objetivou avaliar a ação de práticas químicas e mecânicas visando homogeneizar a distribuição de macronutrientes e a correção da acidez no perfil do solo conduzido sob sistema plantio direto consolidado. Os tratamentos experimentais foram constituídos por uma combinação de práticas de natureza mecânica (aração, gradagem e escarificação) e química (calagem, adubação fosfatada e gessagem) em área de lavoura que estava sob sistema plantio direto há 24 anos. Os gradientes de acidez e de concentração...
Tipo: Folhetos
Palavras-chave: Sistema plantio direto; No-tillage system; Fertilizing; Maize.; Fertilidade do Solo; Adubação; Manejo do Solo; Soja.; Milho; Trigo; Soil fertility; Soil management; No-tillage; Soybeans; Wheat.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1139941

Grain crops and forage yield resulting from the use of phosphates in integrated production system
Provedor de dados: 124
Autores: Galetto,Shivelly Los; Fonseca,Adriel Ferreira da; Harkatin,Silvano; Reifur,Hendrik Ivan; Carvalho,Igor Quirrenbach de.
The aim of this study was to assess the effects of the sources and levels of surface-applied (broadcast) phosphorus (P) when sowing the winter annual forages on phosphorus accumulation and yields of maize, soybean, black oat and annual ryegrass crops in a crop-livestock integration system over three years. The experiment was established in April 2009, in the municipality of Castro, Parana, Brazil. The treatments consisted of the broadcast application when sowing the winter forages of four doses (0, 60, 120 and 180 kg ha-1 year-1) of total P2O5 as triple superphosphate (TSP), rock phosphate (RP-Arad) and magnesium termophosphate (MTP). The dry matter yields of black oat (2009 and 2011), annual ryegrass (2010), maize (2009/10 and 2011/12) and soybean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L; Glycine max (L.) Merril; Black oat; Annual ryegrass; Crop-livestock integration.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000500009

Grain Distribution in Ghana under Imperfectly Competitive Market Conditions
Provedor de dados: 31
Autores: Langyintuo,   Augustine S.
Interspatial and intertemporal grain distribution in Ghana is a private sector activity carried out mainly by traders. These traders sometimes collude to maximize their joint profits. By so doing they influence the conduct of the grains market. To examine the effect of their actions on the informal maize market in Ghana, a spatial equilibrium model was estimated under three scenarios: (1) Perfect competition, (2) Cournot-Narsh conjectures, and (3) Collusion. The results indicate that imperfect competition distorts grain flows, reduces consumer welfare and depresses traders’ sales revenue. Collusive behavior of traders, on the other hand, causes the greatest distortion of grain flows as well as trader and consumer welfare. These results draw attention to...
Tipo: Journal Article
Palavras-chave: Spatial equilibrium; Monopoly; Imperfect competition; Interspatial; Cournot- Narsh conjectures; Crop Production/Industries; D4; L1.
Ano: 2010
URL: http://purl.umn.edu/96166

Grain legumes – their role in European agriculture
Provedor de dados: 21
Autores: Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Jørnsgaard, Bjarne.
Grain legumes are valuable protein and energy sources in animal feeds and in human diets low in meat. However, there is a considerable gap between demand and production of feed protein in the European Union and it is expected to encourage the production and use of European produced grain legume crops in the future. Thus, there is a need to gain knowledge about choice of grain legume species and cropping strategies to secure a sufficient protein supply under different environmental conditions.
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2002
URL: http://orgprints.org/1854/1/Pimasa%2DESJ.pdf

GRAIN MARKETING POLICY CHANGES AND SPATIAL EFFICIENCY OF MAIZE AND WHEAT MARKETS IN ETHIOPIA
Provedor de dados: 31
Autores: Negassa,   Asfaw; Myers,   Robert J.; Gabre-Madhin,   Eleni Z.
In the context of on-going market reform in developing countries, there is a need for an improvement in the existing methods of spatial market efficiency analysis in order to better inform the debate toward designing and implementing new grain marketing policies, institutions, and infrastructure that facilitate the emergence of a well developed and competitive grain marketing system. The standard parity bounds model (PBM), while it overcomes many weaknesses of the conventional methods of spatial market efficiency analysis, it does not allow for the test of structural changes in spatial market efficiency as a result of policy changes. In this paper, building on the standard PBM, we develop an extended parity bounds model (EPBM). The EPBM is a stochastic...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Marketing.
Ano: 2003
URL: http://purl.umn.edu/16133

Grain Quality, Nutrient use Efficiency, and Bioeconomics of Maize under Different Sowing Methods and NPK Levels
Provedor de dados: 117
Autores: Rehman,Abdul; Farrukh Saleem,M; Ehsan Safdar,Muhammad; Hussain,Safdar; Akhtar,Naeem.
Finding more efficient ways to fertilize crops will reduce N losses and increase nutrient uptake. A field experiment was conducted at the Agronomic Research Farm, University of Agriculture, Faisalabad, Pakistan, during 2006 and repeated in 2007. The crop was planted in three different geometrical arrangements, viz. flat sowing (rows spaced 75 cm), ridge sowing (ridges spaced 75 cm), and strip planting (double row strips spaced 120 cm with 30 cm between rows in a strip); NPK was applied in four different combinations (0-0-0 control, 200-100-100 low dose,250-125-125 medium dose, and 300-150-150 high dose kg ha-1). Both fertilizer use efficiency (FUE) and N use efficiency (NUE) were significantly lower with the high fertilizer dose (300-150-150 kg NPK ha-1)...
Tipo: Journal article
Palavras-chave: Nutrient; NPK; Efficiency; Economics; Planting methods; Maize.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400014

Grain yield and kernel crude protein content increases of maize hybrids with late nitrogen side-dressing
Provedor de dados: 63
Autores: Silva,Paulo Regis Ferreira da; Strieder,Mércio Luiz; Coser,Rúbia Patrícia da Silva; Rambo,Lisandro; Sangoi,Luís; Argenta,Gilber; Forsthofer,Everton Leonardo; Silva,Adriano Alves da.
Physiological changes incorporated into current maize hybrids suggest the occurrence of modifications in the nitrogen uptake dynamics, improving plant ability to uptake N during grain filling. This may justify late N side-dressing whenever environmental constraints prevent adequate nitrogen supply during crops vegetative development. This study evaluates effects of nitrogen fertilization at booting and silking on grain yield and kernel crude protein contents of commercial maize hybrids. Two experiments were set up in Eldorado do Sul, RS, during the 2001/2002 and 2002/2003 growing seasons. In 2001/2002, treatments were composed of two hybrids (Agroceres 303 and Pioneer 32R21), three nitrogen rates applied during maize vegetative development (30, 80 and 130...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Nitrogen; Fertilization timing; Productivity.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500014

Grain-supply response in Ethiopia: An error-correction approach
Provedor de dados: 31
Autores: Alemu,   Zerihun Gudeta; Oosterhuizen,   K.; van Schalkwyk,   Herman D.
This paper quantifies the responsiveness of producers of teff, wheat, maize and sorghum to incentives using an error-correction model (ECM). It is found that planned supply of these crops is positively affected by own price, negatively by prices of substitute crops and variously by structural breaks related to policy changes and the occurrence of natural calamities. It has found significant long-run price elasticities for all crop types and insignificant short-run price elasticities for all crops but maize. Higher and significant long-run price elasticities as compared to lower and insignificant short-run price elasticities are attributable to various factors, namely structural constraints, the theory of supply and the conviction that farmers respond when...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/9497

GRANULOMETRY AND ENERGY CONSUMPTION AS INDICATORS OF DISINTEGRATION EFFICIENCY IN A HAMMER MILL ADAPTED TO EXTRACTING ARROWROOT STARCH (Maranta arundinacea) IN COMPARISON TO STARCH EXTRACTION FROM CASSAVA
Provedor de dados: 70
Autores: Branco,Fabiano P.; Naka,Marco H.; Cereda,Marney P.
ABSTRACT The commercial sector of starch extraction has fully automated plants with a minimum scale of 200 ton.day–1, which extracts starch from maize and cassava in Brazil. Although these starches are commodities, the market demands starches with special properties obtained without chemical modifications. A higher-priced starch can compensate for small-scale extraction, as in the case of arrowroot starch, which would correspond to an alternative income for the producer. As a small-scale equipment was not available in Brazil, it was necessary to adapt a hammer mill for arrowroot starch extraction, which should have a performance similar to that obtained from cassava roots using industrial grinders. The degree of disintegration and energy consumption were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Appropriate Technology; Small producers; Mechanization; Agribusiness.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000300341

Grãos e oleaginosas no cerrado do nordeste.
Provedor de dados: 14
Autores: AGUIAR, J. L. P.
ABSTRACT: The Brazilian savana covers a quarter of the national Brazilian territory. About that, 127 millions he are possible for agricultural managerial, 48% were already absorved by productive process. So, the remainder is constituted by frontiers waiting for exploration, part of that was geographicaly placed in areas of North and Northeast regions of country. The area covered with Brazilian savanas, in Northeast region, is abour 361.858,8 km2, and refer to four state (Bahia, Piauí, Ceará and Maranhão). From 1.980 to 2.000, the grain and the oleaginous production, in that region, ocuped about 1.859,4 thousands ha. Roice was the main production, followed by corn and soy. The cultivated area evolution with that grains and with that oleaginous show a tip...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Socioeconomia; Estudo regional; Região Nordeste; Brasil; Socioeconomic; Regional study; Grain; Maize.; Algodão; Arroz; Cerrado; Feijão; Grão; Milho; Soja.; Brazil; Beans; Cotton; Soybeans.; Rice.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/562791

Grassland management with emphasis on nitrogen flows
Provedor de dados: 26
Autores: Peyraud, J.L.; Delaby, L.
This chapter deals with the challenge to reduce nitrogen (N) excretion and the amount of N able to leach under pasture. N inputs need to be adjusted while limiting adverse effects on animal nutrition and milk production per cow and per hectare. The chapter starts with discussing the origin and variation of N flow in dairy cows. N intake is divided into N exported in milk and N excreted in faeces and urine. Variation in N excretion is mainly due to urinary N and can be influenced by fertilization and nutrition management. At the animal level, lowering N fertilization improves the N utilization and N balance without greatly affecting the nutritive value of grasses. Only when the grass crude-protein content falls below 120 g kg-1 dry matter (DM), dry-matter...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1248

Grazing systems and feed supplementation
Provedor de dados: 26
Autores: Van Vuuren, A.M.; Van den Pol-van Dasselaar, A.
Dairy farmers may choose one of four grazing management and feeding systems: unrestricted stocking, restricted stocking during the day, zero-grazing using fresh grass or zero-grazing using ensiled grass. In their choice, farmers may incorporate their opinion towards economics, animal welfare, society and environment. When fed on grass only, a maximum dry-matter intake of 110 to 120 g (kg body weight)-0.75 can be expected. This will cover energy and protein requirements for maintenance and 22 to 28 kg of milk. For higher production levels, supplements are required. For well managed grasslands, supplements with a high proportion of rumen-available carbohydrates are preferred, such as maize silage and sugar-beet pulp. To control energy and protein intake,...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1247

Green and brown bridges between weeds and crops reveal novel Diaporthe species in Australia
Provedor de dados: 16
Autores: Thompson, S.M.; Tan, Y.P.; Shivas, R.G.; Neate, S.M.; Morin, L.; Bissett, A.; Aitken, E.A.B.
Diaporthe (syn. Phomopsis) species are well-known saprobes, endophytes or pathogens on a range of plants. Several species have wide host ranges and multiple species may sometimes colonise the same host species. This study describes eight novel Diaporthe species isolated from live and/or dead tissue from the broad acre crops lupin, maize, mungbean, soybean and sunflower, and associated weed species in Queensland and New South Wales, as well as the environmental weed bitou bush (Chrysanthemoides monilifera subsp. rotundata) in eastern Australia. The new taxa are differentiated on the basis of morphology and DNA sequence analyses based on the nuclear ribosomal internal transcribed spacer region, and part of the translation elongation factor-1α and ß-tubulin...
Tipo: Article / Letter to the editor
Palavras-chave: Alternate weed hosts; Multi-locus; Phomopsis; Phylogeny; Taxonomy.
Ano: 2015
URL: http://www.repository.naturalis.nl/record/588699

Green ear yield and grain yield of maize after harvest of the first ear as baby corn
Provedor de dados: 75
Autores: Silva,Paulo Sérgio L e; Silva,Paulo Igor B e; Sousa,Ana Karenina F de; Gurgel,Kamila M; Pereira Filho,Israel A.
Baby corn (BC) consists of the corn ear harvested two or three days after silk emergence. BC is a profitable crop, making possible a diversification of production, aggregation of value and increased income. Removing the first female inflorescence induces corn to produce others, making possible to produce several BC ears or, alternatively, BC (by harvesting the first ear) and green ears or grain. The objective of this work was to evaluate green ear yield and grain yield, after harvesting the first ear as BC. Corn cultivar AG 1051 was submitted to the following treatments, in a random block design with ten replicates (52 plants per plot): BC harvesting; green ear harvesting (grain moisture content between 60 and 70%); mature ear harvesting; BC harvesting and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Green corn; Flowering.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362006000200005

Green ear yield and grain yield of maize cultivars in competition with weeds
Provedor de dados: 87
Autores: Silva,P.S.L.; Silva,K.M.B.; Silva,P.I.B.; Oliveira,V.R.; Ferreira,J.L.B.
The reduction in herbicide use is one of the greatest interests for modern agriculture and several alternatives are being investigated with this objective, including the adoption of cultivars that suppress weeds. The objective of this study was to verify if maize cultivars develop differently, in competition with weeds, to produce green ears and grain. Randomized complete block design was used, with split-plots and five replications. Cultivars DKB 390, DKB 466, DKB 350, AG 7000, AG 7575 and Master, were evaluated in the plots, without weeding and two weedings (at 22 and 41 days after sowing) in sub plots. Twenty-one species were identified in the experimental area, the most frequent being Gramineae (Poaceae), Euphorbiaceae, Leguminosae (Fabaceae) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Green corn; Leaf; Root; Tolerance to weeds.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000100010

Green manure and nitrogen fertilizer effect on grain yield of corn and sorghum
Provedor de dados: 106
Autores: Ring Meesawat; Yunus Neiro; Prasarn Promsoongwong; Manoch Donsey; Bunlu Dechsorngchun; Charay Chalermnopakun; Karun Jitvichote.
2 ill., 11 tables
Palavras-chave: Corn; Maize; Sorghum; Grain yield; Green manures; N fertilizers; ข้าวโพด; ข้าวฟ่าง; ปุ๋ยพืชสด; ปุ๋ยไนโตรเจน; ผลผลิต; คุณภาพ.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4290

Green manuring for tropical organic cropping – A comparative analysis
Provedor de dados: 21
Autores: Sangakkara, Dr. Ravi; Weerasekera, Mr. Danesh; Freyer, Prof.Dr. Bernhard.
Green manuring is an essential component of tropical organic farming. Field studies evaluated the use of three legumes as in situ or ex situ green manures, along with a nonlegume green manure and a control to ascertain their impacts on soil properties and yields of maize and mung bean grown in major (wet) and minor (dry) seasons.  In situ green manuring, especially with legumes, had the most beneficial impact on soil properties, while with ex situ methods, the use of leaves alone improved soil properties. Yields were increased to a greater extent by green manuring in the minor season, and the in situ system proved to be more beneficial. In ex situ green manuring, greater benefits were obtained by the application of leaves alone.  The impact of different...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management.
Ano: 2008
URL: http://orgprints.org/12524/1/12524.pdf

Greenhouse screening for MDMV resistance of corn
Provedor de dados: 106
Autores: Wichai Kositratana; Suchada Kutium; Thira Sutabutra; Kitti Choonhawongse.
1 ill., 1 table
Palavras-chave: Corn; Maize; Maize dwarf mosaic virus; Variety trials; Selection; Disease resistance; Infection; ข้าวโพด; โรคไวรัสเอมดีเอมวี.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3964

Ground weevil (Coleoptera : Curculionidae) : Corn insect pest
Provedor de dados: 106
Autores: Watchara Choonhawong; Auranuj Kongkanjana; Ocha Prachuabmoh.
1 ill., 2 tables
Palavras-chave: Corn; Maize; Insect pest; Ground weevil; Coleoptera; Biology; ข้าวโพด; มอดดิน.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4265

Group discussion on plant protection
Provedor de dados: 106
Palavras-chave: Corn; Maize; Plant protection; Pathology; Entomology; ข้าวโพด; การอารักขาพืช; โรคพืช; กีฏวิทยา.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3911

Growing corn in southern Thailand
Provedor de dados: 106
Autores: Bunjerd Boonsue.
Palavras-chave: Corn; Maize; Production; Demand; Southern; Thailand; ข้าวโพด; อุปสงค์; การผลิต; ข้อจำกัด.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4003

Growth and Accumulation of Nutrients by Weeds, in Maize and Legumes Intercrops
Provedor de dados: 87
Autores: NOLLA,A.; JUCKSH,I.; CASTALDO,J.H.; ALVARENGA,R.C.; ALBRECHT,L.P.
ABSTRACT: The presence of weeds on fields is a concern for farmers, due to competition with the commercial crops, reducing yields. The intercropping of maize with legumes provides weed control; after senescence, the nutrients accumulated by plants are released, recycling nutrients. The study of plant species and their diversity is called phytosociology. This study aimed at evaluating the accumulation of dry phytomass by maize intercropped with legumes and weeds species, and at evaluating nutrient cycling and the phytosociology of weeds. The experiment consisted of maize intercropped with legumes cover crops: jack-beans, Brazilian jack-beans, velvet bean, lablab-beans, and pigeon pea, and the control treatment (maize without intercrop), all without chemical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Green manure; Phytosociology; Jack beans; Modified importance value index; Velvet bean.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100290

Growth and metabolic activity of the extramatrical mycelium of endomycorrhizal maize plants
Provedor de dados: 90
Autores: Cardoso Filho,J. A.; Pacovsky,R. S.; Cardoso,E. J. B. N.
The objective of this experiment was to quantify the extramatrical mycelium of the arbuscular mycorrhizal (AM) fungus Glomus etunicatum (Becker &amp;amp; Gerdemann) grown on maize (Zea mays L. var. Piranão) provided with various levels of phosphate fertilizer and harvested at 30, 60 and 90 days after planting (DAP). Total extramatrical mycelium (TEM) was extracted from soil using a modified membrane filtration method, followed by quantification using a grid intersection technique. Active extramatrical mycelium (AEM) proportion was determined using an enzymatic method which measured dehydrogenase activity by following iodonitrotetrazolium reduction. At low levels of added P, there was relatively less TEM than at high levels of added P, but the AEM...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arbuscular mycorrhizae; Glomus etunicatum; Extramatrical hyphae; Metabolically active mycelium.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06831999000400007

Growth and mycorrhizal colonization of maize plants treated with aqueous extracts from nonmycorrhizal weeds
Provedor de dados: 86
Autores: Melo,Karla Andréia de; Carrenho,Rosilaine.
Abstract: The objective of this work was to evaluate the influence of aqueous extracts of nonmycorrhizal weedy species on dry matter accumulation and assimilate partitioning of maize plants, with or without Cetraspora pellucida inoculation. The experiment was carried out in pots, in a completely randomized design, in a 5x2 factorial arrangement consisting of four plant extracts (purple nutsedge, guinea-hen weed, slender amaranth, and knotweed), a control irrigated with water, and two conditions (mycorrhizal and nonmycorrhizal maize plants), with four replicates of each treatment. Plants were irrigated with aqueous extracts diluted at 15%. Root colonization (RC), shoot dry matter (SDM), root dry matter (RDM), and RDM/SDM were evaluated. Root colonization...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Amaranthus viridis; Cyperus rotundus; Petiveria alliacea; Polygonum ferrugineum; Allelopathy.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001101042

Growth and physiology of maize under water salinity and nitrogen fertilization in two soils
Provedor de dados: 91
Autores: Braz,Régis dos S.; Lacerda,Claudivan F. de; Assis Júnior,Raimundo N. de; Ferreira,Jorge F. da S.; Oliveira,Adriana C. de; Ribeiro,Aureliano de A.
ABSTRACT The nitrogen fertilization, in general, minimizes the effects of salinity on plants, but the mitigating action depends on plant species, cultivar, soil texture and plant age, among other factors. The objective of this study was to evaluate the effects of irrigation water salinity and nitrogen fertilization on maize physiology and growth (Zea mays) in soils with different textures. The experiment was carried out in a greenhouse in Fortaleza City, CE, Brazil, in PVC soil columns (100 x 20 cm). The design was completely randomized using the factorial 2 x 2 x 4, referring to two soils, an Ultisol and a Quartzipsamment, nitrogen doses of 105 and 210 kg ha-1, under irrigation with saline water of 0.5, 2.0, 4.0 and 6.0 dS m-1, with four repetitions. With...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Leaf gas exchange; Soil texture.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200907

Growth and water use of corn as affected by tillage practices and irrigation frequencies
Provedor de dados: 106
Autores: Tawatchai Na Nagara; Chakranopakhun Tongyai; Paiboon Rattanaprateep.
2 ill., 2 tables
Palavras-chave: Corn; Maize; Tillage; Irrigation; Growth; Yields; Water use; Soil water content; ข้าวโพด; การไถพรวน; การใช้น้ำชลประทาน; อัตราการเจริญเติบโต.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4135

Growth and yield of corn irrigated with saline water
Provedor de dados: 63
Autores: Blanco,Flávio Favaro; Folegatti,Marcos Vinícius; Gheyi,Hans Raj; Fernandes,Pedro Dantas.
Corn (Zea mays L.) is an important crop in Brazil and is cultivated in all regions, including the semi-arid area of Brazil, where the occurrence of irrigation water with high concentration of salts is common. Evaluating the growth and yield of the maize hybrid 'AG 6690' irrigated with water of different salinity levels was the objective of this experiment. Sowing was performed in pots with 12 seeds on May 23, 2003, and seedlings were thinned to two plants per pot. Irrigation was accomplished when the mean soil matric potential of each treatment was approximately -30 kPa using water with seven different electrical conductivities (ECi), varying from 0.3 to 4.5 dS m-1, which were obtained by addition of NaCl and CaCl2 in the equivalent proportion of 1:1. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Tolerance to salinity; Soil solution; Leaf area; Evapotranspiration.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000600002

GROWTH AND YIELD RESPONSE OF MAIZE (Zea mays) TO INTER AND INTRA-ROW WEED COMPETITION UNDER DIFFERENT FERTILIZER APPLICATION METHODS
Provedor de dados: 87
Autores: MAQBOOL,M.M.; TANVEER,A.; ALI,A.; ABBAS,M.N.; IMRAN,M.; AHMAD,M.; ABID,A.A.
A field experiment was conducted for two consecutive years to study the effect of fertilizer application methods and inter and intra-row weed-crop competition durations on density and biomass of different weeds and growth, grain yield and yield components of maize. The experimental treatments comprised of two fertilizer application methods (side placement and below seed placement) and inter and intra-row weed-crop competition durations each for 15, 30, 45, and 60 days after emergence, as well as through the crop growing period. Fertilizer application method didn't affect weed density, biomass, and grain yield of maize. Below seed fertilizer placement generally resulted in less mean weed dry weight and more crop leaf area index, growth rate, grain weight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competition; Fertilizer; Grain yield; Maize; Plant growth.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100047

Growth, production and water and nitrogen use efficiency of maize under water depths and nitrogen fertilization
Provedor de dados: 91
Autores: Campelo,David H.; Teixeira,Adunias dos S.; Moreira,Luis C. J.; Lacerda,Claudivan F. de.
ABSTRACT The objective of this study was to evaluate the growth, the production components and the water (WUE) and nitrogen use efficiency (NUE) in maize (Zea mays L.), as function of water depths and nitrogen doses. The experimental design was randomized blocks in a split-plot scheme with four repetitions. The irrigation treatments applied in the plots were composed of four water depths: 80, 90, 100 and 110% of the water requirement, based on the soil field capacity, while the N doses, distributed in the subplots, were 0, 60, 120 and 180 kg ha-1. Increases in water depths and in N doses promote linear increases in plant height and leaf area index. For cycle I (2015) the maximum yield (16,778.3 kg ha-1) was reached with the irrigation depth of 538.1 mm and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Irrigation management; Mineral fertilization.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001000747

Growth regulator and maize response to the increase in plant density
Provedor de dados: 86
Autores: Leolato,Lucieli Santini; Sangoi,Luis; Durli,Murilo Miguel; Panison,Fernando; Voss,Ramon.
Abstract: The objective of this work was to evaluate the effect of application of the growth regulator Trinexapac-ethyl on maize response to the increase in plant density at two sowing dates. A field experiment was carried out in the municipality of Lages, state of Santa Catarina, Brazil, during the 2014/2015 and 2015/2016 growing seasons. Two sowing dates (10/15 - preferential, and 12/5 - late), four plant densities (5, 7, 9, and 11 plants m-2), with and without Trinexapac-ethyl application, were tested. The growth regulator was sprayed at a rate of 150 g a.i. ha-1, when hybrid P30F53YH was at the V5 and V10 growth stages. The spraying of Trinexapac-ethyl decreased the stem length above the ear insertion node at both growing seasons. Grain yield ranged...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Grain yield; Trinexapac-ethyl.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100997

Guía práctica para la identificación de algunas enfermedades de trigo y cebada
Provedor de dados: 31
Autores: Gilchrist-Saavedra,   L.; Fuentes-Davila,   G.; Martinez-Cano,   C.; Lopez-Atilano,   R.M.; Duveiller,   E.; Singh,   R.P.; Henry,   Monique; Garcia Altimirano,   I.
Segunda Edicion
Tipo: Report
Palavras-chave: Trigo; Cebada; Enfermedades de plantas; Enfermedades fungosas; Epidemiología; Identificación; Métodos; Crop Production/Industries; H20.
Ano: 2005
URL: http://purl.umn.edu/56185

Haematological and Serum Biochemical Responses of Ovambo Chickens Fed Provitamin A Biofortified Maize
Provedor de dados: 89
Autores: Odunitan-Wayas,F; Kolanisi,U; Chimonyo,M.
ABSTRACT The current study was conducted to investigate the influence of provitamin A biofortified maize (PABM) diet, sex and age of birds on the haematological and serum biochemistry parameters of indigenous chickens. A total of ninety-six 13 week old male and female Ovambo chickens were reared and fed on either white maize (WM) a low vitamin A diet or a PABM based diet for eight weeks. Each diet was replicated four times. Packed cell volume (PCV), haemoglobin (Hb), erythrocyte concentration (RBC), leucocytes concentration (WBC), mean corpuscular volume (MCV), mean corpuscular haemoglobin (MCH) and mean corpuscular haemoglobin concentration (MCHC) were measured. Albumin (ALB), globulin (GLOB), total proteins (TP), triglycerides (TRI), cholesterol...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Blood profiles; Health assessment; Indigenous chicken; Provitamin A biofortified maize diet.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300425

Half a century of studying adaptability and stability in maize and soybean in Brazil
Provedor de dados: 63
Autores: Rezende,Wender Santos; Cruz,Cosme Damião; Borém,Aluízio; Rosado,Renato Domiciano Silva.
ABSTRACT: The study of adaptability and stability underlies the cultivar recommendation process for all crops. There is a considerable number of statistical methods available for this purpose, but little is known about their actual adoption by the Brazilian scientific community. The objective of this study was to carry out a systematic review of the scientific literature on the adaptability and stability methods used in maize and soybean in Brazil from scientific articles published between 1970 and 2017 in Brazilian journals. Article searches were carried out in journals indexed through the SciELO database. The articles were classified according to the year of publication and the adaptability and stability methods used. We also evaluated the pattern of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Glycine max (L.) Merril; Genotype × environment interaction; Adaptation; Cultivar recommendation.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000300501

Harvest time and agronomic performance of maize hybrids with contrasting growth cycles
Provedor de dados: 1
Autores: Panison, Fernando; Sangoi, Luís; Kolling, Daniel Fernando; Coelho, Cileide Maria Medeiros; Durli, Murilo Miguel.
The delay of the maize harvest may cause qualitative and quantitative grain losses. This work evaluated the effects of the harvest time on the agronomic performance of maize hybrids with contrasting growth cycles. The experiment was set in Lages, Santa Catarina State,South Brazil, during the 2012/2013 and 2013/2014 growing seasons. A randomized block design, arranged in split plots was used. Five single-cross hybrids were tested in the main plots: P1630H and P32R22H (hyper-early), P2530 (super early) and P30F53YH and P30R50YH (early). Five harvest times were assessed in the split plots: 0 (grain physiological maturity), 10, 20, 30 and 40 days after physiological maturity. The sowing was performed on 12/5/2012 and 10/5/2013. The percentage of lodged and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.00.00.00-4 Zea mays; Maturation; Grain productivity; Lodging Agronomia Agronomia.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27901

Has Green Revolution Bypassed Coarse Cereals? The Indian Experience
Provedor de dados: 31
Autores: Janaiah,   Aldas; Achoth,   Lalith; Bantilan,   Ma Cynthia S.
This paper analysed the growth performance of non-rice crop sectors by estimating total factor productivity (TFP) growth for the selected coarse cereals viz., maize, sorghum and pearl millet in India. The analysis indicates that the TFP growth contributed substantially to the output growth of coarse cereals over the past three decades. The TFP growth was higher in those states where coverage of irrigation was relatively high. TFP grew at an average of 1.4 percent per annum through out the Green Revolution (GR) period for sorghum in the sate of Maharashtra where about half of the India’s sorghum area is concentrated mostly under rainfed conditions. Although small in absolute terms over the past three decades, the overall findings suggest that GR...
Tipo: Journal Article
Palavras-chave: Total factor productivity; Coarse cereals; Green revolution; Adoption rate; India; International Development.
Ano: 2005
URL: http://purl.umn.edu/110142

Have Biotech Seeds Increased Maize Yields?
Provedor de dados: 31
Autores: Xu,   Zheng; Hennessy,   David A.; Moschini,   GianCarlo.
Corn yield is determined by soils, weather, seed used and other technology choices. Global population and per capita income growth trends as well as demand from the energy sector have placed great stress on cropland use. Global cropland acres and/or yield per acre will need to increase. Whether new seed technologies have enhanced corn yield is a controversial issue. We study U.S. county corn yields 1964-2008, controlling for location effects, fertilization technologies and weather. We find evidence that trend yield growth has been fastest in the Central Corn Belt, genetic modification technologies have increased trend yield, and this increase has been largest in the Central Corn Belt.
Tipo: Conference Paper or Presentation
Palavras-chave: Biotechnology; Corn Yield; Trend; Regional Effects; Weather; Fertilization.; Crop Production/Industries; Industrial Organization; Research and Development/Tech Change/Emerging Technologies; L65; Q16.
Ano: 2010
URL: http://purl.umn.edu/61303

Health and Economic Impacts of Mycotoxins in Foods in Latin America and the Caribbean
Provedor de dados: 31
Autores: Jolly,   Pauline E.; Jolly,   Curtis M.
Belize City, Belize 23rd - 27th July, 2007
Tipo: Presentation
Palavras-chave: Mycotoxins; Health; Economic impact; Latin America; Caribbean; Agribusiness; Agricultural and Food Policy; I18; Q18.
Ano: 2009
URL: http://purl.umn.edu/122895

Heavy metals in Oxisols amended with biosolids and cropped with maize in a long-term experiment
Provedor de dados: 63
Autores: Oliveira,Katarzyna Wójcik; Melo,Wanderley José de; Pereira,Gener Tadeu; Melo,Valéria Peruca de; Melo,Gabriel Maurício Peruca de.
Biosolids comprise organic matter and plant nutrients, but are also a source of heavy metals hazardous to soils, plants and humans. The aim of this work was to evaluate accumulation, movement in the soil profile and availability to maize plants of heavy metals in two oxisols amended with biosolids for five years. The experiment was carried out in Jaboticabal, SP, Brazil, under field conditions, using a split-plot design. Biosolids were added to the soils at four different rates, 0.0 (control with mineral fertilization), 2.5; 5.0 and 10.0 t ha-1, dry weight basis, annualy for three years. In the fourth and fifth years, the 2.5 t ha-1 treatment rate was increased to 20.0 t ha-1. In the fifth year, soil samples were collected at 0-20 and 20-40 cm depths and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mehlich 1; Sewage sludge; Maize; Metal availability.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000400012

HEDGING MAIZE YIELD WITH WEATHER DERIVATIVES
Provedor de dados: 31
Autores: Geyser,   J.M.; van de Venter,   T.W.G.
This paper examines the feasibility of weather derivatives in the South African agricultural context by evaluating the merit of rainfall options as a yield risk management tool.  The paper consists of three distinctive parts.  In the first part we introduce weather derivatives and supply a basic overview of the functioning and uses of weather derivatives in general and rainfall options specifically.  Next we examine the South African maize industry and draw conclusions from the influence of rainfall on maize crop yields.  The purpose of this section is to determine the feasibility and necessity of yield hedging mechanism.  We conclude the paper by combining the first two sections into a workable recommendation strategy for the implementation of rainfall...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Marketing.
Ano: 2001
URL: http://purl.umn.edu/18067

Heterochromatin of maize chromosomes: structure and genetic effects
Provedor de dados: 74
Autores: Aguiar-Perecin,Margarida L.R. de; Fluminhan,Antonio; Santos-Serejo,Janay A. dos; Gardingo,José R.; Bertão,Mônica R.; Decico,Maria Juliana U.; Mondin,Mateus.
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400047

Heterogeneity Index of Trade and Actual Heterogeneity Index – the case of maximum residue levels (MRLs) for pesticides
Provedor de dados: 31
Autores: Burnquist,   Heloisa Lee; Shutes,   Karl; Rau,   Marie-Luise; Souza,   Mauricio Jorge Pinto de; Faria,   Rosane Nunes de.
Non-tariff measures (NTMs) beyond traditional trade policy instruments define the requirements that importing countries imposed on foreign products. Due to differences across countries, requirements for supplying foreign markets can lead to trade costs and thus hamper international trade. In this paper, we introduce two regulatory heterogeneity indexes which are subsequently applied to the case maximum residue levels (MRLs) of pesticides. The Heterogeneity Index of Trade (HIT) reflects the respective differences across countries based on the assumption that the mere fact of difference in requirements causes trade costs. Taking the HIT index as a starting point, the Actual Heterogeneity Index (AHI) specially considers the situation where the requirements...
Tipo: Conference Paper or Presentation
Palavras-chave: Non-tariff measures (NTMs); Maximum residue levels (MRLs); Regulatory heterogeneity index; Agri-food trade; Index analysis; Agricultural and Food Policy; International Relations/Trade; Research Methods/ Statistical Methods.
Ano: 2011
URL: http://purl.umn.edu/103742

Heterologous expression of an insecticidal gene from the armed spider (Phoneutria nigriventer)
Provedor de dados: 80
Autores: Figueiredo,J. E. F.; Kalapothakis,E.; Gomez,M. V.; Bressan,W.
Insect-pests are global problems that cause severe damage to crop plants, and their control is commonly based on chemical insecticides. However, negative effects of pesticides on the environment and human health emphasize the necessity to develop alternative methods for insect-pest control. In the present study, a gene coding for the insecticidal peptide TX4(6-1) of the Brazilian armed spider (Phoneutria nigriventer) was cloned in fusion with maltose binding protein (MBP) and expressed in Escherichia coli. The affinity purified protein MBP-GlyTX4 was cleaved with the Xa factor and used for a bioassay against Spodoptera frugiperda and rabbit immunization. Five micrograms GlyTX4 protein injected into the hemocoel of larvae and abdominal cavity of adults...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioinsecticide; Molecular cloning; Heterologous expression; Escherichia coli; Spodoptera frugiperda.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000200006

Heteroplasmia para o gene mitocondrial T-urf13 do citoplasma texas de milho
Provedor de dados: 3
Autores: Sekine, Elizabete Satsuki; UEM; Castro, Laura Leal de; UEM; Prioli, Alberto José; UEM; Prioli, Sônia Maria Alves Pinto; UEM; Prioli, Laudenir Maria; UNICAMP.
Em milho (Zea mays L.), o citoplasma texas (T) condiciona macho-esterilidade (cms-T) e susceptibilidade à toxina de fungos e ao inseticida metomil, características de grande interesse para estudos básicos e melhoramento de plantas. Essas características são aparentemente inseparáveis e estão diretamente associadas ao gene mitocondrial T-urf13, que codifica uma proteína de 13 kilodaltons (URF13). Reversão para fertilidade masculina, associada à resistência à toxina/metomil, tem sido observada em progênies de somaclones cms-T, derivados de calos resistentes ao metomil. Foi encontrada diversidade para amplificação via PCR do gene T-urf13 e para expressão da proteína URF13 nesses somaclones revertentes. Aparentemente, esta diversidade ocorre dentro de tecidos...
Palavras-chave: 2.00.00.00-6 Ciências Biológicas heteroplasmia; Milho; T-urf13; Esterilidade masculina citoplasmática Texas 2.00.00.00-6 Ciências Biológicas.
Ano: 2000
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2818

Heterosis entre poblaciones de maíz de la raza chalqueño con diferente grado de divergencia genética
Provedor de dados: 32
Autores: Esquivel Esquivel, Gilberto.
Con el objeto de evaluar heterosis y los efectos de aptitud combinatoria general (ACG) y específica (ACE) en relación con la amplitud de origen geográfico en etapas tempranas del desarrollo y en productividad en campo, se evaluaron en un arreglo dialélico, diseño II de Griffing 15 poblaciones progenitoras nativas de maíz, sus 105 cruzamientos y otros genotipos adicionales de los Valles Altos de México. Se incluyeron poblaciones progenitoras cuyo origen se ubica en el área de distribución geográfica de la raza Chalqueño (Valles Altos de México) con antecedentes en programas de mejoramiento genético en los Valles Altos de México; ademàs, se incluyeron poblaciones nativas del área de la raza Chalqueño o sus variantes (Chalqueño-Celaya, Chalqueño-Cónico). Para...
Tipo: Tesis
Palavras-chave: Zea mays L.; Vigor inicial; Heterosis; Cruzas dialélicas; Chalqueño; Doctorado; Genética; Early vigor; Heterosis; Diallelic crosses.
Ano: 2008
URL: http://hdl.handle.net/10521/1618

Heterosis expression in crosses between maize populations: ear yield
Provedor de dados: 63
Autores: Silva,Ricardo Machado da; Miranda Filho,José Branco de.
The phenomenon of heterosis has been exploited extensively in maize (Zea mays L.) breeding. The objective of this study was to evaluate the genetic potential of ten maize populations for ear yield following the diallel mating scheme. Six parental populations were obtained through phenotypic selection of open-pollinated ears in Rio Verde, GO, Brazil, (GO populations) and four parental populations were synthesized in Piracicaba, SP, Brazil (GN populations): GO-D (DENTADO), GO- F (FLINT), GO-A (AMARELO), GO-B (BRANCO), GO-L (LONGO), GO-G (GROSSO), GN-01, GN-02, GN-03 and GN-04. Experiments were carried out in three environments: Anhembi (SP) and Rio Verde (GO) in 1998/99 (normal season crop) and Piracicaba (SP) in 1999 (off-season crop). All experiments were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Diallel cross; Combining ability.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300016

Heterosis in crosses among white grain maize populations with high quality protein
Provedor de dados: 86
Autores: Rodrigues,Márcio Costa; Chaves,Lázaro José; Pacheco,Cleso Antônio Patto.
The objective of this work was to investigate heterosis and its components in 16 white grain maize populations presenting high quality protein. These populations were divided according to grain type in order to establish different heterosis groups. The crosses were carried out according to a partial diallel cross design among flint and dent populations. Seven agronomic traits were evaluated in three environments while four leaf diseases and incidence of corn stunt were evaluated in one. Least square procedure was applied to the normal equation X'Xbeta = X'Y, to estimate the model effects and their respective sum of squares. Among the heterosis components, in diallel analysis, significance for average heterosis in grain yield, number of days to female...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Partial diallel; General combining ability.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2006000100009

Heterosis y depresión endogámica de cruzas dialélicas para rendimiento, floración y altura de planta en maíz
Provedor de dados: 32
Autores: Escorcia Gutiérrez, Ledia Nérida.
La información experimental del presente trabajo se obtuvo al evaluar en tres  localidades las generaciones F1, F2 y F3 de las 45 cruzas simples posibles entre  diez líneas de maíz con diez o más autofecundaciones. Las líneas fueron  derivadas en forma aleatoria del compuesto varietal Xolache, perteneciente a la  raza Chalqueño. Se estudiaron las variables rendimiento por planta (RMP), días a  floración masculina (DFM) y altura de planta (AP). Para cada variable se estimaron  los efectos de ACG (gi) de las líneas y los efectos de ACE (sij); con ellos se  construyó la estructura genética de las cruzas (Xij = " + gi + gj + sij), la cual al ser  analizada se encontraron los siguientes resultados: RMP. Las cruzas con  rendimiento alto son aquellas en las que...
Tipo: Tesis
Palavras-chave: Maestría; Genética.
Ano: 2007
URL: http://hdl.handle.net/10521/1438

Heterotic responses of tropical elite maize accessions from Latin America with Brazilian testers
Provedor de dados: 63
Autores: Santos,Manoel Xavier dos; Pollak,Linda Maria; Carvalho,Hélio Wilson Lemos de; Pacheco,Cleso Antônio Patto; Gama,Elto Eugenio Gomes e; Guimarães,Paulo Evaristo de Oliveira; Andrade,Ramiro Vilela de.
Little emphasis has been placed on identifying new sources of tropical maize germplasm that can be used in breeding programs. Additional information on the performance and heterotic classification of tropical germplasm is needed. This study was conducted to identify elite maize accessions from Latin America that could contribute to increase the level of heterosis with the best heterotic patterns of Brazil. Seventy-two elite accessions from the Latin American Maize Project (LAMP) were crossed with the testers BR 105 (flint kernel Suwan background) and BR 106 (dent kernel Tuxpeño background). The 72 crosses plus 9 checks were evaluated using a simple 9 × 9 lattice in four locations that represent one tropical region. The combined analysis showed highly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Germplasm; Selected acessions; Heterosis; Genetic resources.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000400019

Heterozygosity following half-sib recurrent selection in popcorn using isoenzyme markers
Provedor de dados: 69
Autores: Pereira,Liz Kazmirczak; Scapim,Carlos Alberto; Mangolin,Claudete Aparecida; Machado,Maria de Fátima Pires da Silva; Pacheco,Cleso Antônio Patto; Mora,Freddy.
Isozyme biochemical marker may be useful tool for genomic analysis of maize populations undergoing recurrent selection. Thus, isozymes markers was utilized for assess the changes in the genetic variability and distance in a Brazilian composite population of popcorn following four cycles of recurrent selection for yield. One hundred and ninety-six half-sib families were evaluated from each cycle and the ten highest-yielding families (5.2%) were recombined to produce the next cycle. Isozyme analysis considered 80 seedlings per cycle. Simple linear regression equations were estimated among the allele frequencies in each locus in function of the selection cycles, the genetic distances among the cycles and the average heterozygosity per locus for each cycle....
Tipo: Journal article
Palavras-chave: Allozymes frequency; Genetic distance; Selection cycles; Zea mays.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000100004

Híbridos de milho para o Nordeste brasileiro: ensaios realizados no ano agrícola de 1999.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; LEAL, M. de L. da S.; CARDOSO, M. J.; SANTOS, M. X. dos; LIRA, M. A.; TABOSA, J. N.; OLIVEIRA, J. S. de; CARVALHO, B. C. L. de; DOURADO, V. V.; SAMPAIO, G. V.
bitstream/item/40740/1/Hibrido0001.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Brasil; Nordeste; Maize; Brazil.; Hibrido; Milho; Zea Mays.; Hybrids.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/899184

High grain quality accessions within a maize drought tolerant core collection
Provedor de dados: 63
Autores: Ignjatovic-Micic,Dragana; Kostadinovic,Marija; Bozinovic,Sofija; Andjelkovic,Violeta; Vancetovic,Jelena.
Maize (Zea mays L.) landraces are an important source of genes for improving commercial germplasm. Today, drought tolerance and grain quality are major challenges in maize cultivation due to climatic changes and population growth. The Maize Research Institute genebank has a drought tolerant collection, which includes 13 landraces (from the former Yugoslavia) and 12 introduced populations (from different countries). These accessions were analyzed for protein, oil, starch and tryptophan contents, in order to identify drought tolerant accessions with high grain quality. Also, simple sequence repeat (SSR) analysis with specific primers for opaque2 recessive allele (o2) was carried out. All analyzed accessions showed high levels of protein. Oil content ranged...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Opaque2; Protein; Starch; Oil; Tryptophan.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000500009

High quality protein maize
Provedor de dados: 106
Autores: Sutat Sriwatanapongse; Tawatchai Prasatsrisupab.
4 tables
Palavras-chave: Corn; Maize; Plant breeding; High quality protein; Lysine; Triptophan; Opaque-2; Yield trials; Variety trials; Yields; ข้าวโพด; โปรตีนข้าวโพด; ไลซีน; คุณภาพ; โอเพค 2; การปรับปรุงประชากร.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3862

Higher Calorie Intakes Related to Higher Incomes in Northern Mozambique
Provedor de dados: 31
Autores: Rose,   Donald; Strasberg,   Paul J.; Jeje,   Jose Jaime; Tschirley,   David L.
Resultados das investigações do Departamento de Análise de Políticas MAP-Direcção de Economía
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Food consumption; Food Consumption/Nutrition/Food Safety; Q18.
Ano: 1999
URL: http://purl.umn.edu/55211

High-quality protein maize
Provedor de dados: 106
Autores: Sutat Sriwatanapongse; Tawatchai Prasatsrisupab.
2 tables
Palavras-chave: Corn; Maize; High quality protein; Plant breeding; Population improvement; Yield trials; ข้าวโพด; ข้าวโพดโปรตีนสูง.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3823

Historical note on hybrid corn
Provedor de dados: 106
Autores: Singleton, W. Ralph.
7 ill.
Palavras-chave: Corn; Maize; Hybrid corn; Hybrids; ข้าวโพด; พันธุ์ลูกผสม.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3725

Household Food Consumption in Mozambique: A Case Study in Three Northern Districts
Provedor de dados: 31
Autores: Rose,   Donald; Strasberg,   Paul J.; Jeje,   Jose Jaime; Tschirley,   David L.
Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambique
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Food policy; Mozambique; Food consumption; Food Consumption/Nutrition/Food Safety; Q18.
Ano: 1999
URL: http://purl.umn.edu/56031

Household Food Security in Commercialized Subsistence Economies: Factors Influencing Dietary Diversity of Smallholder Tea Farmers in Nandi South, Kenya
Provedor de dados: 31
Autores: Langat,   B.K.; Sulo,   T.K.; Nyangweso,   P.M.; Ngeno,   V.K.; Korir,   M.K.; Kipsat,   Mary J.
Policies fronting commercialization of agriculture in Kenya assumed that realization of increased household incomes, through cultivation of cash crops, would guarantee improved food security and subsequent reduction of poverty. However, most communities in Kenya growing cash crops are currently struggling to put food on the table. Nandi South is a maize deficit zone despite being 68% arable and having good climate (GoK, 2005). Population pressure has led to competition for limited land resource, coupled with unfavourable poverty indicators; they have impacted negatively on food access in the district. Specifically significant is smallholder tea population in Nandi Hills division. The study focused the population of smallholder tea farmers in Nandi South...
Tipo: Conference Paper or Presentation
Palavras-chave: Food Consumption/Nutrition/Food Safety.
Ano: 2010
URL: http://purl.umn.edu/97086

Household Resource Endowment and Determinants of Adoption of Drought Tolerant Maize Varieties: A Double-hurdle Approach
Provedor de dados: 31
Autores: Legese,   Getachew; Langyintuo,   Augustine S.; Mwangi,   Wilfred; Jaleta,   Moti; La Rovere,   Roberto.
Existing literature suggests the influence of household wealth on farmer's technology adoption decisions. In 2007, this study was conducted to provide a clearer understanding of how differences in household wealth affect the way in which other variables influence adoption decisions. Using data from 369 households in Adama and Adami Tulu Jido Kombolcha districts of Ethiopia, the paper first stratified households into poorly and well-endowed categories based on wealth indices constructed using their productive assets by the principal components method. A double hurdle model was then specified and estimated for each wealth group to assess factors influencing the adoption and use intensity of improved varieties. The results suggest that factors influencing the...
Tipo: Conference Paper or Presentation
Palavras-chave: Wealth index; Double-hurdle model; Ethiopia; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2009
URL: http://purl.umn.edu/51785

HOW CHINA’S FARMERS ADAPT TO CLIMATE CHANGE?
Provedor de dados: 31
Autores: Wang,   Jinxia; Mendelsohn,   Robert; Dinar,   Ariel; Huang,   Jikun.
This paper examines how farmers have adapted to the current range of climates across China.  A cross sectional method is used to analyze irrigation choice and crop choice across 8,405 farmers in 28 provinces in China.  We find that both irrigation and crop choice decisions are climate sensitive. Chinese farmers are more likely to irrigate when facing lower temperatures and less precipitation.  Farmers in warmer places are more likely to choose oil crops, maize, and especially cotton and wheat, and are less likely to choose vegetables, potatoes, sugar and especially rice and soybeans.  In wetter locations, farmers are more likely to choose soybeans, oil crops, sugar, vegetables, cotton and especially rice, and they are less likely to choose potato, wheat...
Tipo: Conference Paper or Presentation
Palavras-chave: Climate Change; Adaptation; Irrigation Choice; Crop Choice; China; Environmental Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/51803

HOW COMPETITIVE IS AGRIBUSINESS IN THE SOUTH AFRICAN FOOD COMMODITY CHAIN?
Provedor de dados: 31
Autores: van Rooyen,   C.J.; Esterhuizen,   Dirk; Doyer,   Ockert T.
The competitiveness of sixteen selected food commodity chains in South Africa was calculated using the Revealed Comparative Advantage method of Balassa.  The majority of commodity chains are marginally competitive.  Except for the maize, pineapple, and apple chains, the competitiveness index generally decreases when moving from primary to processed products.  This implies that benification or "value adding" opportunities in South Africa are restricted.  To compete in a global economy strategies should be followed that improve the competitiveness of the whole food supply chain.  It is i.e. not good enough for farmers to be able to compete globally at farm gate level, whilst the locally processed commodities that is sold to the consumer is not competitive in...
Tipo: Working or Discussion Paper
Palavras-chave: Agribusiness.
Ano: 1999
URL: http://purl.umn.edu/18081

HOW DOES GENDER AFFECT THE ADOPTION OF AGRICULTURAL INNOVATIONS? THE CASE OF IMPROVED MAIZE TECHNOLOGY IN GHANA
Provedor de dados: 31
Autores: Morris,   Michael L.; Doss,   Cheryl R.
Why do men and women adopt agricultural technologies at different rates? Evidence from Ghana suggests that gender-linked differences in the adoption of modern maize varieties and chemical fertilizer are not attributable to inherent characteristics of the technologies themselves but instead result from gender-linked differences in access to key inputs.
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 1999
URL: http://purl.umn.edu/21609

How Non-Research Investments Affect Research Impact: The Case of Maize Technology Adoption in Southern Mali
Provedor de dados: 31
Autores: Boughton,   Duncan; Frahan,   Bruno Henry de.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1996
URL: http://purl.umn.edu/11287

How strong is the “natural hedge”? The effects of crop acreage and aggregation levels
Provedor de dados: 31
Autores: Finger,   Robert.
The level of natural hedge, i.e. the (negative) correlation between price and yield levels, is an important determinant for farmers’ income risks and their demand for risk management instruments. The natural hedge is often approximated with correlations observed at more aggregated levels, e.g. the county level. This induces biases because the natural hedge at the farm-level is smaller than on more aggregated levels. In this paper, we put this idea one step forward and investigate the empirical relationship between price-yield correlations and the underlying crop acreage, using farm-level data for 5 crops in Switzerland. We find that, for instance, a 1% increase in area under maize and intensive barley leads to a change in the correlation by -0.02 and...
Tipo: Presentation
Palavras-chave: Price-yield correlation; Aggregation bias; Crop insurance; Risk and Uncertainty; Q1; G2.
Ano: 2012
URL: http://purl.umn.edu/122538

Huella genética de siete razas de maíz de Valles Altos de México.
Provedor de dados: 32
Autores: Rocandio Rodríguez, Mario.
Dentro de la diversidad del maíz (Zea mays L.) de México, uno de los grupos de mayor interés es el del complejo piramidal que se cultiva en Valles Altos centrales de México. Con la finalidad de caracterizar la diversidad genética de siete razas de maiz de Valles Altos, se realizó un estudio utilizando variables morfológicas y marcadores moleculares (SSRs). Se hizo, además, un análisis simultáneo de los datos disponibles sobre dos líneas de evidencia, para hacer clasificaciones más robustas. Se incluyeron entre 8 y 26 accesiones que han sido consideradas por diferentes autores como representativas de las razas Arrocillo Amarillo, Cónicos, Elotes Cónicos, Palomero Toluqueño, Chalqueño y Purépecha. La adquisición de semillas se realizó mediante solicitud a...
Palavras-chave: Zea mays L.; Diversidad genética; Marcadores moleculares; Teocintle; Análisis conjunto; Genetic diversity; Molecular markers; Teosinte; Joint analysis; Genética; Doctorado.
Ano: 2013
URL: http://hdl.handle.net/10521/2092

Humic fractions of forest, pasture and maize crop soils resulting from microbial activity
Provedor de dados: 58
Autores: Tavares,Rose Luiza Moraes; Nahas,Ely.
Humic substances result from the degradation of biopolymers of organic residues in the soil due to microbial activity. The objective of this study was to evaluate the influence of three different ecosystems: forest, pasture and maize crop on the formation of soil humic substances relating to their biological and chemical attributes. Microbial biomass carbon (MBC), microbial respiratory activity, nitrification potential, total organic carbon, soluble carbon, humic and fulvic acid fractions and the rate and degree of humification were determined. Organic carbon and soluble carbon contents decreased in the order: forest &gt; pasture &gt; maize; humic and fulvic acids decreased in the order forest &gt; pasture=maize. The MBC and respiratory activity were not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Humification; Microbial biomass carbon; Potential nitrification; Respiratory activity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300028

Hungary’s Biofuel Market
Provedor de dados: 31
Autores: Hingyi,   Hajnalka; Kurthy,   Gyongyi; Radoczne Kocsis,   Terez.
In 2005 the Hungarian Exise Tax Act was amended regarding the sale of biofuels. The amendment stipulated that from July 1, 2007 fuels with a 4.4 volume percentage bioethanol content will be sold in Hungary. It equally stipulated that from January 1, 2008 fuels with a 4.4 volume percentage biodiesel content will also be sold. Hungary’s stated 2010 biofuel objective is 5.75%, which is calculated in relation to energy content. Blending requirements for this transition are 144 thousand tonnes of bioethanol (or 106 thousand tonnes of ETBE, due to its higher energy content) and 183 thousand tonnes of biodiesel. Hungary’s planned biofuel production capacities are approximately 3 million tonnes of bioethanol and 400 thousand tonnes of biodiesel, which seems...
Tipo: Journal Article
Palavras-chave: Production; Consumption and export of bioethanol and biodiesel; Raw material supply and handling of by-products; Resource /Energy Economics and Policy; Marketing.
Ano: 2007
URL: http://purl.umn.edu/47017

Hybrid corn standard yield trial
Provedor de dados: 106
Autores: Pichet Grudloyma; Kritchai Jaiserb; Pornsak Duangpudtan; Sukapong Vayuparp; Preecha Saengsoda; Nirun Sukchun; Sakol Petchmanee; Pranom Parkij; Chempol Hlairoongrueng; Adisak Kumnuansilp; Puangphet Narintaraporn; Yongyooth Khewchaum; Amnuay Tongdee.
2 tables
Palavras-chave: Corn; Maize; Hybrids; Yield trial; ข้าวโพด; ลูกผสม; การทดสอบพันธุ์.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4297

Hybrid maize selection through GGE biplot analysis
Provedor de dados: 53
Autores: Oliveira,Tâmara Rebecca Albuquerque de; Carvalho,Hélio Wilson Lemos de; Oliveira,Gustavo Hugo Ferreira; Costa,Emiliano Fernandes Nassau; Gravina,Geraldo de Amaral; Santos,Rafael Dantas dos; Carvalho Filho,José Luiz Sandes de.
ABSTRACT The cultivation of genotypes non-adapted to the cultivation region of interest is among the main factors responsible for low yield. The aim of the present study is to select hybrid maize through GGE biplot analysis and to assess its adaptability and stability in different environments in Northeastern Brazil. Twenty-five hybrid maize cultivars were assessed in ten different environments in Northeastern Brazil in 2012 and 2013 based on the randomized block design, with two replications. The analysis of variance and assessment of genotype adaptability and stability were made through GGE biplot analysis, based on grain yield. Analysis of variance results showed different performances depending on the genotype, as well as genotype/environment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: G × E interaction; Multivariate analysis; Zea mays L.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000200166

Hybrids corn yield trial
Provedor de dados: 106
Autores: Somrak Noradechanon.
7 tables
Palavras-chave: Corn; Maize; Hybrids; Yield trial; ข้าวโพด; ลูกผสม; การทดสอบผลผลิต.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4502

Hydrogel, biocompost and its effect on photosynthetic activity and production of forage maize plants (Zea mays L.)
Provedor de dados: 109
Autores: Pedroza-Sandoval,Aurelio; Yáñez-Chávez,Luis Gerardo; Sánchez-Cohen,Ignacio; Samaniego-Gaxiola,José Alfredo; Trejo-Calzada,Ricardo.
Abstract The increase in the incidence and intensity of drought caused by climate change is a critical factor in agricultural production in some regions of the world. Dry lands are often severely affected by water shortages caused by low rainfall. This study evaluated the effect of compost and hydrogel used to retain soil moisture on photosynthetic activity and forage corn production. The experiment was designed as a randomized block with a split plot design; the main plots were the hydrogel application rates (0, 12.5 and 25 kg ha-1), and the subplots were the compost application rates (0 and 20 t ha-1). Photosynthetic activity increased by 20.2-28.0% when the hydrogel was applied at rates of 12.5 and 25 kg ha-1, respectively, compared with the control. As...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aridity; Biofertilizers; Edaphic moisture; Stress physiology; Corn productivity.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000100063

Hydrological validation of High Wide Ridges as a soil conservation technology applied to tobacco crop.
Provedor de dados: 14
Autores: DENARDIN, J. E.; MARCON, G. P.; FAGANELLO, A.; LEMAINSKI, J.; BACK, A. J.; JUNQUEIRA, B. R.; OLIVEIRA, V. B. de.
High Wide Ridge Soil Management is a conservation practice associated with the no-tillage, reduced tillage, and conventional tillage systems, usual in small farms in southern Brazil. Integrated with winter grain or ground cover crops such as wheat (Triticum aestivum), rye (Secale cereale), black oats (Avena strigosa) and white oats (Avena sativa), millet (Pennisetum glaucum L.), Sudan grass (Sorghum sudanense), sorghum (Sorghum spp.), mucuna (Mucuna spp.), and brachiaria (Brachiaria spp.), high wide ridge is being used for tobacco (Nicotiana tabacum), soybean (Glycine max L.), maize (Zea mays), and beans (Phaseolus vulgaris) during the spring and summer seasons. The benefits expected from this technology, related to the performance of the tobacco crop,...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Infiltration of water in the soil; Intense rain; Return period; Soil conservation.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1131755

Hyperspectral remote sensing to assess the water status, biomass, and yield of maize cultivars under salinity and water stress
Provedor de dados: 53
Autores: Elsayed,Salah; Darwish,Waleed.
ABSTRACT Spectral remote sensing offers the potential to provide more information for making better-informed management decisions at the crop canopy level in real time. In contrast, the traditional methods for irrigation management are generally time-consuming, and numerous observations are required to characterize them. The aim of this study was to investigate the suitability of hyperspectral reflectance measurements of remote sensing technique for salinity and water stress condition. For this, the spectral indices of 5 maize cultivars were tested to assess canopy water content (CWC), canopy water mass (CWM), biomass fresh weight (BFW), biomass dry weight (BDW), cob yield (CY), and grain yield (GY) under full irrigation, full irrigation with salinity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Irrigation; Precision agriculture; Precision phenotyping; Spectral indices.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000100062

Hypoglycemic activity of polysaccharide fractions containing ß-glucans from extracts of Rhynchelytrum repens (Willd.) C.E. Hubb., Poaceae
Provedor de dados: 56
Autores: De Paula,A.C.C.F.F.; Sousa,R.V.; Figueiredo-Ribeiro,R.C.L.; Buckeridge,M.S.
ß-Glucans are soluble fibers with physiological functions, such as interference with absorption of sugars and reduction of serum lipid levels. The objective of the present study was to analyze the distribution of ß-glucans in different tissues of the African grass species Rhynchelytrum repens and also to evaluate their hypoglycemic activity. Leaf blades, sheaths, stems, and young leaves of R. repens were submitted to extraction with 4 M KOH. Analysis of the fractions revealed the presence of arabinose, glucose, xylose, and traces of rhamnose and galactose. The presence of ß-glucan in these fractions was confirmed by hydrolyzing the polymers with endo-ß-glucanase from Bacillus subtilis, followed by HPLC analysis of the characteristic oligosaccharides...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: SS-Glucans; Cell wall; Hypoglycemic activity; Diabetes mellitus; Grasses; Rhynchelytrum repens.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000600010

IACP uniform yield trial no. 1-1971
Provedor de dados: 106
Autores: Park, Keun Yong.
4 tables
Palavras-chave: Corn; Maize; Yield trials; Temperate-like zone; Variety trials; Yields; ข้าวโพด; การทดสอบผลผลิต; พื้นที่เพาะปลูก; เขตอบอุ่น.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3771

IACP yield trial no. 2
Provedor de dados: 106
Autores: Rifin, Amsir.
1 table
Palavras-chave: Corn; Maize; Yield trials; Variety trials; Yields; ข้าวโพด; การทดสอบผลผลิต.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3772

Ideal culture conditions for Dicyma pulvinata conidia mass production
Provedor de dados: 86
Autores: Melo,Débora Ferreira; Mello,Sueli Corrêa Marques de.
The objective of this work was to set up ideal conditions for conidia mass production of Dicyma pulvinata. Four isolates were compared in terms of their growth and conidia production on various substrates (grains of parboiled rice, common rice, maize and wheat, besides chipped maize and rice husk), temperatures (19, 22, 25, 28 and 31ºC), growth containers (aluminum trays, polypropylene bags and Erlenmeyers) and light regimes (continuous darkness, 6 and 12 hours of light/darkness, and continuous light). Temperature effects on conidia germination capacity were also evaluated. The experiments were done in randomized complete block designs, in factorial arrangements (isolates x treatments - substrates, containers, temperatures and light regimes), with four...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microcyclus ulei; Biocontrol; Biofungicide; Leaf blight; Rubber tree.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009001000004

Ideal seeds harvest moment of different maize hybrids
Provedor de dados: 65
Autores: Jacob Junior,Elias Abrahão; Mertz,Liliane Marcia; Henning,Fernando Augusto; Peske,Silmar Teichert; Villela,Francisco Amaral; Labbé,Leopoldo Mario Baudet.
The aim of this study was to identify the ideal maize seed harvest moment by different characteristics, as black layer formation, milk line development, seed moisture content and seed dry matter accumulation. Three simple hybrids from Syngenta Company were used in this work; ears from plants in the same development stage were collected, the first harvesting began 40 days after flowering, at four days interval until all seeds in an ear had the black layer formation. The characteristics evaluated were: black layer formation, milk line development, seed moisture content and seed dry matter. Seed physiological quality was evaluated by germination test, cold test, accelerated ageing and electrical conductivity. Results obtained in this study showed that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Milk line; Black layer.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000200010

Identificação através de PCR dos genes CryI de cepas de Bacillus thuringiensis Berliner eficientes contra a lagarta do cartucho, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae)
Provedor de dados: 44
Autores: Valicente,Fernando H.; Barreto,Marliton R.; Vasconcelos,Maria J. V. de; Figueiredo,José E.F. de; Paiva,Edilson.
Fall armyworm, Spodoptera frugiperda (J. E. Smith), is the most important maize insect pest in Brazil and its damage can reduce yield up to 34%. The objective of this work was to utilize the PCR technique to Identify Bacillus thuringiensis (B.t) strains that control S. frugiperda in maize crops. Bioassays showed that 16 strains were very effective against S. frugiperda, 15 of them collected from soil samples and one (T09) obtained at the Institute Pasteur. The DNA of these strains were probed with cryI general primers and their proteins were analised by SDS-PAGE eletrophoresis. All strains present positive results for cryI genes. To further characterize these strains, specific cryI primers were employed. PCR technique showed that some strains harbour the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; CryI genes; Biocontrol; Fall armyworm.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80592000000100018

Identificação de sistemas de produção nos lotes do núcleo de colonização de Altamira, Pará.
Provedor de dados: 14
Autores: HOMMA, A. O.; VIEGAS, R. M. F.; GRAHAM, J.; LEMOS, J. de J. S.; LOPES, J. C. dos M.
bitstream/item/57401/1/CPATU-ComTec4.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cana-de-açúcar; Pequeno agricultor; Cultura temporaria; Altamira; Pará; Brasil; Production system; Maize; Bean; Sugar-cane; Temporary crop.; Arroz; Feijão; Mandioca; Milho; Sistema de Produção.; Amazonia; Cassava; Small farms.; Rice.
Ano: 1978
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376711

Identification of 14-3-3-like protein in sugarcane (Saccharum officinarum)
Provedor de dados: 74
Autores: Kuramae,Eiko Eurya; Fenille,Roseli Chela; Rosa Jr.,Vicente Eugenio de.
In a search of the sugarcane expressed sequence tag (SUCEST) database we located three full-length cDNAs (SCCCLR1022D05.g, SCCCRZ1001D02.g and SCBFLR1026E02.g) encoding the 14-3-3 proteins from sugarcane (Saccharum officinarum). The encoded proteins were identified based on the clustering of the expressed sequence tags and were shown to encode proteins similar to 14-3-3 proteins of other monocotyledonous plants. Cluster SCCCLR1022D05.g was 99% similar to the maize 14-3-3-like protein (gi|1345587) while cluster SCCCRZ1001D02.g shared 96% and SCBFLR1026E02.g 94% similarity with the 14-3-3 protein of rice (gi|7435022). Although 14-3-3 proteins have been reported to be specific to particular species, tissue or organ from which they were isolated, all three...
Tipo: Info:eu-repo/semantics/article
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572001000100007

Identification of haploid maize by flow cytometry, morphological and molecular markers
Provedor de dados: 64
Autores: Couto,Evellyn Giselly de Oliveira; Davide,Livia Maria Chamma; Bustamante,Fernanda de Oliveira; Pinho,Renzo Garcia Von; Silva,Tallyta Nayara.
The development of homozygous breeding lines in maize may be accelerated through the use of haploids. Thus, the obtaining and prior identification of haploids generated by the haploid inducer lines is an important factor. The purpose of this study was to identify haploids by flow cytometry and to correlate the nuclear DNA content to the morphological and morphometric traits of the seeds that gave rise to them. In addition, molecular markers were used to confirm the androgenetic nature of the haploid. The seeds obtained were derived from the cross between the inbred line W23 and the commercial hybrid P30F90. Among these seeds, a group was selected, putative haploids, whose embryo was white and the pericarp purplish. This group, consisting of 330 seeds, was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Nuclear DNA content; Androgenetic inheritance; R-navajo; Microsatellites.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000100003

IDENTIFICATION OF HOMOGENEOUS RAINFALL ZONES DURING GRAIN CROPS IN PARANÁ, BRAZIL
Provedor de dados: 70
Autores: Lopes,Allan R.; Marcolin,Jonatas; Johann,Jerry A.; Boas,Márcio A. Vilas; Schuelter,Adilson R.
ABSTRACT The aim of this study is to identify homogeneous rainfall zones in the winter and summer 1st and 2nd crops, in the state of Paraná, Brazil. The zones were defined by clustering using the expectation-maximization (EM) algorithm to transform seasonal rainfall series. Monthly average rainfall data collected from 157 weather stations for 20 years (1996 to 2015) were employed. The results show that the number of homogeneous zones varied among growing seasons. The summer crop presented two clusters, with rainfall averages of 1489 and 1925 mm; the second crop presented four clusters, with averages of 1849, 1004, 1454, and 1182 mm; and the winter crop had three clusters, with averages of 969, 1498, and 1171 mm. Clustering was a useful instrument to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Data mining; Clusters; Expectation-maximization; Weka; Soybean; Maize; Wheat.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600707

IDENTIFICATION OF MAIZE LODGING: A CASE STUDY USING A REMOTELY PILOTED AIRCRAFT SYSTEM
Provedor de dados: 70
Autores: Acorsi,Matheus G.; Martello,Maurício; Angnes,Graciele.
ABSTRACT A common agricultural problem in many regions of Brazil is maize lodging, as a consequence of strong winds and rain which impacts on crop growth and yield. However, collecting data using ground-based, manual field measurement methods is inefficient. An emerging tool is the Remotely Piloted Aircraft System (RPAS), capable of delivering spatial data with high resolution and flexible periodicity. In this study, the potential to detect the maize lodging using crop surface models derived from RPAS was assessed. Our RPA-based approach uses a quantitative threshold to determine lodging percentage. The threshold values of plant height, used to detect the occurrence of lodging, were based on fixed and variable values. The validation of percentage lodging...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop surface model; Structure from motion; Canopy height; RGB.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000800066

Identification of populations and hybrid combinations of maize for in natura consumption
Provedor de dados: 53
Autores: Rocha,Daniel Sarto; Rovaris,Sara Regina Silvestrin; Rodrigues,Cinthia Souza; Ticelli,Marcelo; Sawazaki,Eduardo; Paterniani,Maria Elisa Ayres Guidetti Zagatto.
ABSTRACT Brazil is one of the leading countries in the production of maize (Zea mays), with great potential for growing green maize, which has a superior commercial value in relation to maize marketed in the form of grains. Although important, the availability of cultivars recommended for the production of green maizeis still very scarce. The objectives of the present study were to estimate genetic parameters and to identify promising hybrid combinations for the development of new green maize cultivars to farmers. In the summer crop of 2016/17, ten hybrid combinations obtained through a complete diallel of five maize populations, with attributes for in natura consumption, were evaluated in two sites of the state of São Paulo, Brazil: the Instituto...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Diallel; Green maize; Special corns; Gene effects.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400535

Identification of Pulling Factors for Enhancing the Sustainable Development of Agriculture with Special Reference to Maize in India
Provedor de dados: 31
Autores: Singh,   R.P.; Kumar,   Ranjit; Singh,   N.P.
Indian agriculture is highly diversified both in terms of production environment and activities. The main objective of the study is to identify and prioritize constraints and accelerators of agricultural diversification and promotion of selected promising CGPRT crops, I.e: maize. Five states namely Bihar, Madhya Pradesh, Punjab, Rajashtan and Uttar Pradesh have been selected for the study. The results of the study are mainly based on tabular analysis using simple statistical methods like arithmetic mean and standard deviation.
Tipo: Report
Palavras-chave: Diversification; Farming systems; Maize; Marketing; Processing; Crop Production/Industries.
Ano: 2005
URL: http://purl.umn.edu/32682

Identification of sources of resistance to anthracnose stalk rot in maize
Provedor de dados: 65
Autores: Nicoli,Alessandro; Zambolim,Laércio; Costa,Rodrigo Veras da; Guimarães,Lauro José Moreira; Lanza,Fabrício Eustáquio; Silva,Dagma Dionísia da; Cota,Luciano Viana.
ABSTRACT: Adoption of resistant cultivars is the primary measure used to control anthracnose stalk rot. The goal of this study was to identify maize-resistant genotypes to anthracnose stalk rot, which are similar to the hybrid 2B710. Experiments were performed at Embrapa Maize and Sorghum experimental fields in Brazil. The first experimental trial evaluated 234 maize lines as well as two commercials hybrids, BRS1010 (susceptible) and 2B710 (resistant). Artificial inoculations were performed with a strain at the blister (R2) phase, and evaluation of disease severity was performed after 30 days. The second experimental trial evaluated 48 maize lines and hybrids, inoculated with two Colletotrichum graminicola strains. In the first trial, eight resistance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Germplasm bank; Colletotrichum graminicola.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001101885

IDENTIFYING APPROPRIATE GERMPLASM FOR PARTICIPATORY BREEDING: AN EXAMPLE FROM THE CENTRAL VALLEYS OF OAXACA, MEXICO
Provedor de dados: 31
Autores: Bellon,   Mauricio R.; Smale,   Melinda; Aguirre,   Alfonso; Taba,   Suketoshi; Aragon,   Flavio; Diaz,   Jaime; Castro,   Humberto.
Identifying the appropriate germplasm to be improved is a key component of any participatory breeding effort because of its implications for impacts on social welfare and genetic diversity. This paper describes a method developed to select a subset of 17 populations for a participatory breeding project from a set of 152 maize landraces. The larger set of landraces was collected in order to characterize, for conservation purposes, the maize diversity present in the Central Valleys of Oaxaca, Mexico. The method combines data representing the perspectives of both men and women members of farm households and those of genetic resources specialists, including professional plant breeders, gene bank managers, and social scientists. The different perspectives...
Tipo: Working or Discussion Paper
Palavras-chave: Mexico; Oaxaca; Maize; Zea mays; Land race; Germplasm conservation; Plant breeding; Selecting; Innovation adoption; Social welfare; Welfare economics; On farm research; Participatory research; Farm Management.
Ano: 2000
URL: http://purl.umn.edu/46524

Identifying the Factors that Influence Small-scale Farmers’ Transaction Costs in Relation to Seed Acquisition - An ethnographic case study of maize growing smallholders in the Central Valleys of Oaxaca, Mexico
Provedor de dados: 31
Autores: Badstue,   Lone B.
Using an ethnographic approach, this study explores small-scale farmers’ perceived transaction costs in relation to maize seed acquisition in the Central Valleys of Oaxaca. These farmers have different needs and require seed of diverse maize types with multiple traits in particular combinations. Formal seed distribution has yet to develop in this region and farmers depend mostly on informal seed sources. Issues of information about maize seed, seed transaction negotiation and enforcement are examined from a small-scale farmer perspective through the use of qualitative data. Results show that farmers’ perceived transaction costs are low to negligible in most cases where seed transactions take place locally, and trust is indicated as a factor which serves to...
Tipo: Working or Discussion Paper
Palavras-chave: Small-scale farmers; Transaction costs; Seed acquisitions; Maize (Zea mays L.); Informal seed sector; Oaxaca; Institutional and Behavioral Economics; D23; O17; Q12; Z13.
Ano: 2004
URL: http://purl.umn.edu/23800

Il ruolo degli agricoltori custodi (seed savers) nel recupero della biodiversità maidicola
Provedor de dados: 21
Autores: Gamba, Ursula.
La biodiversità è un indicatore della salute dell'ambiente ed è la principale risorsa naturale a subire gli imprevedibili cambiamenti climatici. Molta biodiversità è stata persa: questo aspetto è meglio conoscito come erosione genetica. La riduzione della biodiversità è determinata sia dall'attività umana che dai naturali processi evolutivi.  Istituti di ricerca, governi regionali e associazioni non governative lavorano a diversi livelli per preservare molte specie in via d'estinzione. Ci sono molte associazioni di agricoltori custodi (seed savers) nel mondo che stanno ricercando e conservando cultivars locali di piante. Il C.R.A.B. ha identificato sette cultivars locali di mais in Piemonte (Pignoletto giallo, Pignoletto rosso, Ostenga, Nostrano...
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation Biodiversity and ecosystem services.
Ano: 2007
URL: http://orgprints.org/15246/1/bollettino_03_07_seed_savers.pdf

Image analysis in the evaluation of the physiological potential of maize seeds1
Provedor de dados: 124
Autores: Pinto,Crislaine Aparecida Gomes; Carvalho,Maria Laene Moreira de; Andrade,Dayliane Bernardes de; Leite,Eva Rezende; Chalfoun,Igor.
The Seed Analysis System (SAS) is used in the image analysis of seeds and seedlings, and has the potential for use in the control of seed quality. The aim of this research was to adapt the methodology of image analysis of maize seedlings by SAS, and to verify the potential use of this equipment in the evaluation of the physiological potential of maize seeds. Nine batches of two maize hybrids were characterised by means of the following tests and determinations: germination, first count, accelerated ageing, cold test, seedling emergence at 25 and 30ºC, and speed of emergence index. The image analysis experiment was carried out in a factorial scheme of 9 batches x 4 methods of analysis of the seedling images (with and without the use of NWF as substrate, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Vigour; SAS.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000200319

Immature tassels as alternative explants in somatic embryogenesis and plant regeneration in south Brazilian maize genotypes - doi: 10.4025/actasciagron.v35i1.15545
Provedor de dados: 1
Autores: Grando, Magali Ferrari; Universidade de Passo Fundo; Varnier, Madelaine Lourdes; Universidade de Passo Fundo; Silva, Marilia Rodrigues de; Universidade de Passo Fundo; Emydgio, Beatriz Marti; Empresa Brasileira de Pesquisa Agropecuária; Pereira, Luiz Ricardo; Empresa Brasileira de Pesquisa Agropecuária; Suzin, Marilei; Universidade de Passo Fundo.
Somatic embryogenesis and in vitro plant regeneration are fundamental processes in the obtainment of transgenic maize plants. Explant, genotype and culture medium are determining factors in these processes. Immature embryo explants and the American Hi-II genotype have been widely employed to acquire genetically modified plants in this species. However, the use of more readily available explants is desired as well as the development of genetic transformation protocols for productive genotypes adapted to local conditions. This study provides an evaluation of immature tassel explants in relation to embryogenic callus production and plant regeneration in South Brazilian maize genotypes for their use in genetic transformation experiments. Immature tassels from...
Tipo: Cultura de tecidso in vitro
Palavras-chave: 5.01.03.00-8 embryogenic callus; Tissue culture; Explants; Zea mays 5.01.03.05-9 embryogenic callus; Tissue culture; Explants; Zea mays.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/15545

IMPACT ANALYSIS OF FOOD POLICY RESPONSE ON HOUSEHOLD FOOD SECURITY: THE CASE OF SOUTH AFRICA’S MAIZE SUBSECTOR
Provedor de dados: 31
Autores: Vermeulen,   Hester; Ndibongo Traub,   Lulama; Meyer,   Ferdinand H.
This study quantifies the possible income and nutritional impact of the recent commitment by the South African Department of Agriculture to increase budgetary spending on agricultural development. Three levels of models are utilized.  The first, a large-scale partial equilibrium model, generated an outlook for maize grain under two possible future scenarios; the first is the baseline scenario under which it is assumed no additional government investment in the agricultural sector takes place, the second allows for the impact of an investment within the maize subsector large enough to increase local maize production by 15% above the baseline.  The second model, a rational distributed lag model, links the grain sector to the maize meal down-stream market....
Tipo: Conference Paper or Presentation
Palavras-chave: Partial Equilibrium Model; Vertical Price Transmission; Household Food Security.; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Marketing; C22; C32; C53; D1; Q11; Q18.
Ano: 2009
URL: http://purl.umn.edu/51396

IMPACT ASSESSMENT OF THE 2003 CAP REFORM AND THE NITRATE DIRECTIVE ON THE ARABLE FARMING SYSTEM IN THE MIDI-PYRÉNÉES REGION: BIO-ECONOMIC MODELING AT FIELD, FARM AND REGIONAL LEVELS
Provedor de dados: 31
Autores: Louhichi,   Kamel; Belhouchette,   Hatem; Wery,   Jacques; Therond,   Olivier; Flichman,   Guillermo.
This paper analyses the impact of the 2003 CAP reform (the so-called Fischler Reform) and its interaction with the Nitrate Directive on the sustainability of selected arable farming systems in a French region (Midi-Pyrénées). The Nitrate Directive is one of the oldest EU environmental programs designed to reduce water pollution by nitrate from agricultural sources, through a set of measures, defined at regional level, and mandatory for farmers of vulnerable zones. This impact analysis is performed through a bio-economic modelling framework coupling the crop model CropSyst and the farm-based model FSSIM developed, within the EU FP6 SEAMLESS project (Van Ittersum et al., 2008). The 2003 CAP reform was compared first to the continuation of Agenda 2000...
Tipo: Conference Paper or Presentation
Palavras-chave: Integrated assessment; Agricultural Policy; Nitrate Directive; Bioeconomic modelling; Multi-scale analysis.; Agricultural and Food Policy; Environmental Economics and Policy; Research Methods/ Statistical Methods; Q18; Q52; Q58.
Ano: 2008
URL: http://purl.umn.edu/44826

Impact assessment of trade liberalisation between EU and Mercosur countries
Provedor de dados: 31
Autores: Weissleder,   Lucie M.; Adenauer,   Marcel; Heckelei,   Thomas.
Ongoing bilateral trade negotiations between the Mercosur group and the EU since 2000 on agricultural products served as incitement to analyse the impacts of possible outcomes. The objective of this paper is to quantitatively assess impacts of bilateral liberalisation scenarios on EU25 and Mercosur markets as well as their bilateral trade flows. For this purpose, the CAPRI model, which has already been applied to several multi- and bilateral trade liberalisation scenarios in the past, has been adopted in several ways. (1) Trading blocks in CAPRI have been expanded so that the Mercosur countries are now represented with country specific behavioural functions and explicit trade flows. (2) The parameters of these behavioural functions have been calibrated...
Tipo: Conference Paper or Presentation
Palavras-chave: Trade liberalisation; Mercosur; CAPRI; Armington.; Demand and Price Analysis; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/6667

Impact of Agri-food Systems on Landscape Appearance
Provedor de dados: 31
Autores: Kapfer,   Martin; Ziesel,   Sigrid; Kantelhardt,   Jochen.
Our study examines the potential developments of cultural landscapes, taking into consideration various economic and social conditions (scenarios). The study takes place in three project regions which represent typical landscapes in Southern Germany and Austria. In each project area, the influence of a changing agri-food environment is analysed. The following scenarios are defined: (1) status quo (current economic and agri-political framework); (2) high-producer prices and constant (or even increasing) direct payments; and (3) low-producer prices and no (or very low) direct payments. In all three regions, potential production responses are estimated for all farms and aggregated on a regional level. The estimation takes into account social and economic...
Tipo: Conference Paper or Presentation
Palavras-chave: Scenario analyses; Structural change; Landscape visualisation; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Food Consumption/Nutrition/Food Safety; Labor and Human Capital.
Ano: 2010
URL: http://purl.umn.edu/95042

IMPACT OF BIOTECHNOLOGY IN EUROPE: THE FIRST FOUR YEARS OF BT MAIZE ADOPTION IN SPAIN
Provedor de dados: 31
Autores: Demont,   Matty; Tollens,   Eric.
In the present paper we estimate the impact of a biotechnology innovation in Spanish agriculture.  Transgenic Bt maize offers the potential to control corn borers, that cause economically important losses in Spanish maize cultivation, more efficiently.  Since 1998, Syngenta commercializes the variety Compa CB, equivalent to an annual area of 25.000ha, or an average adoption rate of 5,2% of Spain’s total land allocation to maize.  The profit increase engendered by this technological change during the four-year period 1998-2001 is estimated to be E8,4 million for Spanish agriculture and E2,8 million for Syngenta and the seed suppliers.  The industry appears to be able to extract only one fourth of the total benefits.  The lion share, i.e., three fourth,...
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/31851

Impact of direct seeding mulch-based cropping systems on soil nematodes in a long-term experiment in Madagascar
Provedor de dados: 86
Autores: Villenave,Cécile; Rabary,Bodovololona; Chotte,Jean-Luc; Blanchart,Eric; Djigal,Djibril.
The objective of this work was to assess the effects of conventional tillage and of different direct seeding mulch-based cropping systems (DMC) on soil nematofauna characteristics. The long-term field experiment was carried out in the highlands of Madagascar on an andic Dystrustept soil. Soil samples were taken once a year during three successive years (14 to 16 years after installation of the treatments) from a 0-5-cm soil layer of a conventional tillage system and of three kinds of DMC: direct seeding on mulch from rotation soybean-maize residues; direct seeding of maize-maize rotation on living mulch of silverleaf (Desmodium uncinatum); direct seeding of bean (Phaseolus vulgaris)-soybean rotation on living mulch of kikuyu grass (Pennisetum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop residues; Indicator; Living mulch; Nematoda; Soil functioning.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000800022

Impact of Improved Maize Germplasm on Poverty Alleviation: The Case of Tuxpeno-Derived Materials in Mexico
Provedor de dados: 31
Autores: Bellon,   Mauricio R.; Adato,   Michelle; Becerril,   Javier; Mindek,   Dubravka.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Food Security and Poverty.
Ano: 2005
URL: http://purl.umn.edu/7658

Impact of land use intensity on the species diversity of arbuscular mycorrhizal fungi in agroecosystems of central Europe
Provedor de dados: 21
Autores: Oehl, Fritz; Sieverding, Ewald; Ineichen, Kurt; Mäder, Paul; Boller, Thomas; Wiemken, Andres.
The impact of land use intensity on the diversity of arbuscular mycorrhizal fungi (AMF) was investigated at eight sites in the “three-country corner” of France, Germany, and Switzerland. Three sites were low-input, species-rich grasslands. Two sites represented low- to moderate-input farming with a 7-year crop rotation, and three sites represented high-input continuous maize monocropping. Representative soil samples were taken, and the AMF spores present were morphologically identified and counted. The same soil samples also served as inocula for “AMF trap cultures” with Plantago lanceolata, Trifolium pratense, and Lolium perenne. These trap cultures were established in pots in a greenhouse, and AMF root colonization and spore formation were monitored over...
Tipo: Journal paper
Palavras-chave: Soil biology.
Ano: 2003
URL: http://orgprints.org/26750/1/Oehl_et_al_2003_AEM.pdf

IMPACT OF NO-TILL TECHNOLOGIES IN GHANA
Provedor de dados: 31
Autores: Ekboir,   Javier M.; Boa,   Kofi; Dankyi,   A.A.
In the 1990s, no-till with mulch, a sustainable agricultural alternative, was introduced to Ghanaian farmers through a joint program between the Crops Research Institute in Kusami, Ghana, Sasakawa Global 2000, and the Monsanto Company. The package was disseminated to farmers in the Forest, Transition, and Guinea Savannah Zones, and rapidly adopted. In 2000, it was estimated that 100,000 small-scale farmers practiced no-till on 45,000 hectares of land. This study examines the impact of no-till on farmers who adopted the technology in the three zones, and to a lesser extent, the reasons for non-adoption. The impact of no-till among agrochemical dealers was also evaluated. The report found that no-till brought important changes to farmers using the technology...
Tipo: Working or Discussion Paper
Palavras-chave: Farm Management.
Ano: 2002
URL: http://purl.umn.edu/23721

Impact of Public- and Private- Sector Maize Breeding Research in Asia, 1966-1997/98
Provedor de dados: 31
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2001
URL: http://purl.umn.edu/7656

Impact of Public Market Information System (PMIS) on Farmers Food Marketing Decisions: Case of Benin
Provedor de dados: 31
Autores: Kpenavoun Chogou,   Sylvain; Lebailly,   Philippe; Adegbidi,   Anselme; Gandonou,   Esaie.
To sell their surpluses of maize, the main staple in Benin, farmers may choose among three modes of transaction: they may sell under a contract with itinerant traders, or they may sell without a contract at the farmgate or on distant markets. It has been postulated that farmers may choose a profitable mode of transaction if they have good access to information on the prevailing market conditions. Using detailed farm household survey data from Benin, this paper applies the Nested Logit model to test this hypothesis. The results show that farmers are likely to opt for selling at the farmgate without a contract if they have good access to information. However, such a decision may not be related to access to information through the government supported 'Public...
Tipo: Conference Paper or Presentation
Palavras-chave: Public Market Information System; Farmers; Modes of transaction; Liberalization; Agribusiness; Agricultural and Food Policy.
Ano: 2009
URL: http://purl.umn.edu/52999

Impact of pyrochar and hydrochar on soybean (Glycine max L.) root nodulation and biological nitrogen fixation
Provedor de dados: 21
Autores: Scheifele, Michael; Hobi, Andrea; Buegger, Franz; Gattinger, Andreas; Schulin, Rainer; Boller, Thomas; Mäder, Paul.
The aim of this study was to identify effects of carbonized organic material (‘‘biochar’’) on soybean growth, root nodulation and biological nitrogen fixation, and to elucidate possible underlyingmechanisms.Soybean (Glycine max L.) was grown in four arable soils amended with carbonized organic material produced from wood or maize as feedstocks, by pyrolysis (‘‘pyrochar’’) or hydrothermal carbonization (‘‘hydrochar’’). Nodulation by Bradyrhizobium, biological nitrogen fixation (BNF) assessed by15N techniques, plant growth, nutrient uptake and changes in chemical soil propertiesafter soil amendment were determined. Data were analyzed by means of a three way ANOVA onthe factors soil, carbonization technique and feedstock. It turned out that soybean root...
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Composting and manuring Nutrient turnover.
Ano: 2017

Impact of the drought on the fodder self-sufficiency of organic and conventional highland dairy farms
Provedor de dados: 21
Autores: Boisdon, Isabelle; Capitaine, Mathieu.
Eight highland dairy farms in the French Massif Central (4 organic and 4 conventional) were surveyed from 2000 to 2005 to understand the forage system functioning and the specificities of organic farms. During this period two important droughts occurred, which highly affected the fodder self-sufficiency of the organic farms, having consequences on more than a year of production. The conventional farms were less affected than the organic ones, and the farmers developed varied strategies including a reduction of the LU and the use of more maize. To maintain the stability of the milk production, organic farms had to increase the reliance on external fodder resources. The lack of security forage stores can explain the sensitivity of these farms and their...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farming Systems.
Ano: 2008
URL: http://orgprints.org/11623/1/11623.pdf

Impact of Zero Tillage in India's Rice-Wheat Systems
Provedor de dados: 31
Autores: Laxmi,   Vijay; Erenstein,   Olaf; Gupta,   Raj K.
To date, the most widely adopted resource conserving technology (RCT) in the Indo-Gangetic Plains (IGP)has been zero-tillage (ZT) for wheat after rice, particularly in India. This report reviews and synthesizes the experience with zero tillage in the Indian IGP. Zero tillage of wheat after rice generates significant benefits at the farm level, both in terms of significant yield gains (6–10%, particularly due to timelier planting of wheat) and cost savings (5–10%, particularly tillage savings). These benefits explain the widespread interest of farmers and the rapidity of the diffusion across the Indian IGP, further aided by the wide applicability of this mechanical innovation. The study  subsequently reports on the findings of village-level focus-group...
Tipo: Report
Palavras-chave: Wheat; Rice; Agricultural development; Zero tillage; Farming systems; Rotational cropping; Water use; Environmental factors; Production costs; India; Crop Production/Industries; E16; F08.
Ano: 2007
URL: http://purl.umn.edu/56093

IMPACT VAN BIOTECHNOLOGIE IN EUROPA: DE EERSTE VIER JAAR BT MAIS ADOPTIE IN SPANJE
Provedor de dados: 31
Autores: Demont,   Matty; Deloof,   Frederik; Tollens,   Eric.
In the present paper we estimate the impact of a biotechnology innovation in Spanish agriculture.  Transgenic Bt maize offers the potential to control corn borers, that cause economically important losses in Spanish maize cultivation, more efficiently.  Since 1998, Syngenta commercializes the varieties ‘'Compa CB'’ and ‘'Jordi CB’', equivalent to an annual area of 20.000 ha, or an average adoption rate of 5,2% of Spain’'s total land allocation to maize.  The profit increase engendered by this technological change during the four-year period 1998-2001 is estimated to be 8,7 million E for Spanish agriculture and 2,8 million E for Syngenta and the seed suppliers.  The industry appears to be able to extract only one fourth of the total benefits.  The lion...
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2002
URL: http://purl.umn.edu/31842

Impacto de la producción de biocombustibles en Estados Unidos en el mercado de maíz (Zea maíz L.) en México.
Provedor de dados: 32
Autores: Romero Padilla, Arely.
En los últimos años, México ha venido importado grandes cantidades del maíz que consume su población. Ante esta dependencia alimentaria, nuestro país es vulnerable a los cambios en la producción internacional de este cereal y altamente susceptible a las decisiones y políticas que se establecen en Estados Unidos por ser éste el principal proveedor de maíz a México y el principal productor y exportador a nivel mundial. Aunado a ello, ante la crisis energética mundial se ha dado un crecimiento en la producción de biocombustibles, en donde Estados Unidos ha destinado gran parte su producción de maíz a la generación de etanol, lo que impacta directamente la disposición de este cereal para exportarse a los países deficitarios como México.  El objetivo de este...
Palavras-chave: Importaciones; Biocombustibles; Maíz; Políticas Agrícolas; Precios Agrícolas; Imports; Biofuels; Corn; Agricultural Policy; Agricultural Prices; Economía; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1872

Impacto do manejo nos atributos físicohídricos de um Latossolo Vermelho sob cerrado, no município de Selvíria, Estado do Mato Grosso do Sul - DOI: 10.4025/actasciagron.v28i1.1284
Provedor de dados: 1
Autores: Silva, Monica Martins da; ESALQ - USP; Alves, Marlene Cristina; UNESP; Sousa, Antônio de Pádua; UNESP-FCA; Fernandes, Flávia Carvalho Silva; ESALQ- USP.
Verificouse a influência da semeadura direta, convencional e quatro plantas de cobertura na condutividade hidráulica saturada, infiltração, retenção, armazenamento de água e potencial mátrico em um Latossolo Vermelho de cerrado cultivado com milho, na Unesp de Ilha Solteira, Estado de São Paulo. Utilizouse o delineamento experimental de blocos casualizados, no esquema em faixas com parcelas subdivididas, com 4 blocos. As parcelas foram constituídas pelas plantas de cobertura: Mucuna aterrima, Pennisetum americanum, Crotalaria juncea e Cajanus cajan e área de pousio, e as subparcelas pelos sistemas de semeadura direta (SD) e convencional (SC). Nas camadas de 0,00,10 e 0,100,20 m nas tensões entre 6 e 100 kPa, a SC obteve maior armazenamento de água no solo;...
Palavras-chave: 5.01.01.00-5    Ciência do Solo condutividade hidráulica do solo saturado; Infiltração; Retenção água no solo; Armazenamento de água no solo; Potencial mátrico 5.01.01.00-5    Ciência do Solo.
Ano: 2006
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1284

Impactos del mejoramiento de maiz en America Latina 1966-1997
Provedor de dados: 31
Autores: Morris,   Michael L.; Lopez-Pereira,   Miguel A.
Tipo: Working or Discussion Paper
Ano: 2000
URL: http://purl.umn.edu/48285

IMPACTS OF AGRICULTURAL RESEARCH ON POVERTY: FINDINGS OF AN INTEGRATED ECONOMIC AND SOCIAL ANALYSIS
Provedor de dados: 31
Autores: Meinzen-Dick,   Ruth Suseela; Adato,   Michelle; Haddad,   Lawrence James; Hazell,   Peter B.R.
The extent to which agricultural research has reduced poverty has become an increasing concern of policymakers, donors, and researchers. Until recently, poverty reduction was a secondary goal of agricultural research. The primary focus was on increasing food supplies and reducing food prices, a strategy that was successful in increasing the yields of important food staples. When increased productivity is combined with increased agricultural employment, lower food prices, and increased off-farm employment, agricultural research can be credited with significant reductions in rural poverty. However, these benefits do not necessarily materialize, and thus it is essential to understand how agricultural technologies influence and are influenced by the diverse...
Tipo: Working or Discussion Paper
Palavras-chave: Poverty; Agricultural research; Sustainable livelihoods; Vulnerability; Agricultural extension; Bangladesh; China; India; Mexico; Kenya; Zimbabwe; Research and Development/Tech Change/Emerging Technologies.
Ano: 2003
URL: http://purl.umn.edu/16088

Impacts of agricultural trade and market liberalization of food security in developing countries: comparative study of Kenya and Zambia
Provedor de dados: 31
Autores: Nyairo,   Newton Morara; Kola,   Jukka; Sumelius,   John.
The introduction of agricultural reforms has debatable effects on food security in developing countries. This research investigates how such effects influenced maize supply in two developing countries which were among the first to introduce agricultural reforms. Conclusions from the research suggest that agricultural reforms led to mixed results. This may be attributed to the sometimes stop-go nature of reform implementation. The mixed results are reflected in the weak maize output response to price changes. Overall country economic conditions, state of agricultural development can be attributed to the pace of response, hence effect on agricultural supply. Elasticity of maize output to changes in price and acreage are strongly significant in maize output...
Tipo: Journal Article
Palavras-chave: Food security; Agricultural reforms; Elasticity of supply; International Relations/Trade.
Ano: 2010
URL: http://purl.umn.edu/96172

Impacts of CIMMYT's International Training Linked to Long-Term Trials in Conservation Agriculture: 1996-2006
Provedor de dados: 31
Autores: Svitakova,   Jirina; Kosina,   Petr; La Rovere,   Roberto.
Tipo: Report
Palavras-chave: Education; Training courses; International cooperation; Research institutions; Natural resources; Resource conservation; Environmental Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/56089

Impacts of conservation agriculture-based farming technology on maize crop production in Pakistan
Provedor de dados: 111
Autores: Faheem, Muhammad.
A light weight zone disk tiller (ZDTD) drill was redesigned and developed employing Solid works and Auto-Cad software. For field performance evaluation of machine, the experimental trials were conducted at Post Graduate Research Station (PARS), University of Agriculture, Faisalabad, Pakistan. An area of 1.62 ha (4 ac) was divided two halves; one half area for conventional method of maize planting and the second half for maize planting by redeveloped light weight zone disk tiller drill. Under conventional method extensive field preparation operations were performed whereas no field preparation had been done for planting maize with zone disk tiller drill. After harvesting the paddy crop, zone disk tiller drill was passed through the standing stubble field...
Tipo: Info:eu-repo/semantics/article
Ano: 2022
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7705

IMPACTS OF INTERNATIONAL MAIZE BREEDING RESEARCH IN DEVELOPING COUNTRIES, 1966-98
Provedor de dados: 31
Autores: Morris,   Michael L.
This report, which updates and extends the findings of an earlier CIMMYT study published in 1994, documents the impacts of international maize breeding research in the developing world. Covering the period 1966-98, the report reviews public and private investment in maize breeding research, describes the products of public and private maize breeding programs, estimates farm level adoption of modern varieties (MVs), and estimates the gross value of additional grain production attributable to international breeding efforts. Although private companies have greatly increased their investment in maize breeding research in recent years, public maize breeding programs still play an important role, especially in breeding for subsistence-oriented farmers. Seed...
Tipo: Report
Palavras-chave: Productivity Analysis.
Ano: 2002
URL: http://purl.umn.edu/23722

Impacts of International Research on Intertemporal Yield Stability in Wheat and Maize: An Economic Assessment
Provedor de dados: 31
Autores: Gollin,   Douglas.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/7657

Impacts of International Wheat Breeding Research in Developing Countries, 1966-97
Provedor de dados: 31
Autores: Heisey,   Paul W.; Lantican,   Maximina A.; Dubin,   H. Jesse.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2002
URL: http://purl.umn.edu/7653

Impacts of International Wheat Breeding Research in the Developing World, 1988-2002
Provedor de dados: 31
Autores: Lantican,   Maximina A.; Dubin,   H. Jesse; Morris,   Michael L.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2005
URL: http://purl.umn.edu/7654

Impacts of Maize Breeding Research in Latin America, 1966-1997
Provedor de dados: 31
Autores: Morris,   Michael L.; Lopez-Pereira,   Miguel A.
Tipo: Working or Discussion Paper
Ano: 1999
URL: http://purl.umn.edu/48286

Impacts of Turkey’s Integration into the European Union on Agricultural Markets and Income Distribution
Provedor de dados: 31
Autores: Nazlioglu,   Saban; Erdem,   Ekrem.
This study analyzes the impacts of Turkey’s integration into the EU on price, production, consumption, and self-sufficiency in the selected agricultural markets (wheat, maize, sugar, milk, beef, lamb, and poultry). The study also examines the welfare and the income distribution impacts of the integration. A partial equilibrium model, Modéle Internationale Simplifié de Simulation (MISS), is used to simulate the impacts of the integration on the agricultural markets and Gini coefficients are calculated to examine the income distribution effects. The results show that the integration has substantial impacts on the selected agricultural markets in Turkey and deteriorates the distribution of income among the selected Turkish producers.
Tipo: Article
Palavras-chave: Economic integration; Agricultural markets; Impact analysis; Income distribution; Agribusiness; Agricultural and Food Policy.
Ano: 2011
URL: http://purl.umn.edu/118575

Impacts of Type of Fallow and Invasion by Chromolaena odorata on Weed Communities in Crop Fields in Cameroon
Provedor de dados: 7
Autores: Ngobo, Martine; IITA; m.ngobo@cgiar.org; McDonald, Morag; University of Wales, Bangor; mamcd@bangor.ac.uk; Weise, Stephan; ; s.weise@cgiar.org.
In the humid forest regions of southern Cameroon in central Africa, sectoral and macroeconomic policy reforms introduced in the late 1980s have led to intensified land use, which in turn has resulted in, among other environmental consequences, shortened fallow systems dominated by the Asteraceae shrub, Chromolaena odorata (L.) King and Robinson, rather than by secondary forest species. A trial was established to determine the effect of shortened fallow duration and invasion by C. odorata on the weed flora in subsequent mixed food cropping systems. Plots were established in cleared 5- to 7-year-old fallow fields in which the vegetation was either dominated by C. odorata or not, and in which the dominant fallow vegetation in the previous...
Tipo: Peer-Reviewed Reports
Palavras-chave: CVA; Cameroon; Chromolaena odorata; Fallow; Weeds.
Ano: 2004

Impediments to Competitiveness of Small and Medium-Scale Maize Milling Enterprises in South Africa
Provedor de dados: 31
Autores: Orefi,   Abu.
The maize milling industry is highly characterised by continuous growth in maize milling and retailing margins in real terms (Traub and Jayne, 2004) despite the benefits and opportunities brought about by the deregulation of the South African maize market in 1997. This may be indicative of the inability of small and medium-scale maize milling enterprises (SMSMMEs) to emerge and compete with large-scale maize millers. This paper examines the constraints faced by SMSMMEs in South Africa. Data were collected with the aid of a structured questionnaire. Millers were asked to identify the various challenges facing their enterprises. Some key constraints identified were; high transport costs, high maize prices, brand name establishment and government policies...
Tipo: Conference Paper or Presentation
Palavras-chave: Enterprises; Maize; Milling; South Africa; Agricultural and Food Policy; Community/Rural/Urban Development; Demand and Price Analysis; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; International Relations/Trade; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/52123

Importance of appropriate selection environments for breeding maize adapted to organic farming systems
Provedor de dados: 21
Autores: Messmer, Monika M.; Burger, Henriette; Schmidt, Walter; Geiger, Hartwig H.
Organic farming systems, characterized by special attention to soil fertility, recycling techniques and low external inputs, gained increased significance in recent years. As a consequence, there is a growing demand for varieties adapted to organic and/or low input farming. The objectives of the present study were to (i) compare the testcross performance of segregating maize (Zea mays) populations under established organic (OF) and conventional farming (CF) systems, (ii) determine quantitative genetic parameters decisive for the selection response under OF vs CF conditions, and (iii) draw conclusions for breeding new varieties optimally adapted to OF. Testcross performance of four different material groups of preselected lines (90 lines per group) derived...
Tipo: Book chapter
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation.
Ano: 2010
URL: http://orgprints.org/17864/1/messmer%2Detal%2D2009%2Dtagung%2Dvereinigung%2Dpflanzenz%C3%BCchter%2Dsaatgutkaufleute%2D%C3%B6sterreichs.pdf

IMPROVED FALLOWS IN KENYA: HISTORY, FARMER PRACTICE, AND IMPACTS
Provedor de dados: 31
Autores: Place,   Frank; Franzel,   Steven Charles; Noordin,   Qureish; Jama,   Bashir.
This case study explores the development, dissemination, adoption, and impact of improved tree fallows in rural western Kenya. The processes of technology development and dissemination throughout the region are described and analyzed. To analyze adoption and impact, the paper applies a variety of different data collection methods as well as samples from both pilot areas where researchers maintained a significant presence and non-pilot areas where farmers learned of the technologies through other channels. Sample sizes for the quantitative analysis ranged from almost 2,000 households for measuring the adoption process to just over 100 households for measuring impact indicators. Qualitative methods included long-term case studies for 40 households and focus...
Tipo: Working or Discussion Paper
Palavras-chave: Agroforestry; Soil fertility; Kenya; Adoption; Impact; Technology; Farm Management.
Ano: 2004
URL: http://purl.umn.edu/16054

Improved  inputs use and productivity in Uganda’s maize sub-sector
Provedor de dados: 31
Autores: Godfrey,   Okoboi.
This paper used the Uganda National Household Survey (UNHS) data set of 2005/06 to examine the productivity of improved inputs used by smallholder maize farmers in Uganda. Yield and gross profit functions were estimated with the stochastic frontier model. Results revealed a significant effect improved inputs use on yield but not gross profit. Moreover, farmers who planted recycled seed (of improved variety) without fertilizer obtained lower yield but the highest gross profit. Furthermore, if the opportunity cost of own land and labour inputs in maize production were imputed, overall, farmers made economic losses. Based on the prevailing farmers’ production technology and market conditions, maize cultivation in the range of 2‐3 ha was found to give optimum...
Tipo: Report
Palavras-chave: Maize farming; Fertilizers; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; Crop Production/Industries; Farm Management; Food Consumption/Nutrition/Food Safety; Land Economics/Use; Production Economics.
Ano: 2010
URL: http://purl.umn.edu/101714

Improved Legume Seed Demand Systems in Central Malawi: What Do Farmers' Seed Expenditures Say about Their Preferences?
Provedor de dados: 31
Autores: Kankwamba,   Henry; Mangisoni,   Julius H.; Simtowe,   Franklin; Mausch,   Kai; Siambi,   Moses.
The overall objective of this paper is to assess the demand for improved groundnut, bean, and soybean seed in central Malawi. Specifically, it examines how smallholder farmers respond to changes in market prices of improved legume seed. It also assesses factors that affect the decision to participate in improved seed technology transfer. Considering four commodities namely groundnuts, beans, soybeans and maize,  a staple food,  the paper estimates a multivariate probit and a linear approximate of the Almost Ideal Demand System (LA/AIDS) using cross section data collected by ICRISAT in 2010. Uncompensated price and expenditure elasticities are reported for the LA/AIDS model. The paper finds high own price elasticities in all four commodities considered. It...
Tipo: Presentation
Palavras-chave: Legumes; Multivariate Probit; LA/AIDS; Malawi; Demand and Price Analysis.
Ano: 2012
URL: http://purl.umn.edu/123945

IMPROVED SYSTEMS OF RICE FARMING IN ZAIRE:  A COMPARISON OF UPLAND AND IRRIGATED RICE
Provedor de dados: 31
Autores: Kamuanga,   Mulumba.
Cassava, maize, rice, groundnuts and plantains constitute the main food crops in Zaire.  Rice is a staple food in several regions though its consumption has thus been concentrated in the urban centers.  The Department of Agriculture had estimated that rice consumption increased at an annual rate of 2.1 percent for the 1971-74 period and it has also predicted that this rate may reach 9.1 percent by the end of the decade.  One of Zaire's key problems is to meet its domestic demand for rice. The government policy of fixing annual hectarage targets for rice and other crops to be achieved through the opening of new land and through exhorting farmers to grow more rice has not succeeded in closing the gap between supply and demand. The focus now is on development...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries.
Ano: 1977
URL: http://purl.umn.edu/11201

Improvement and development of sweet corn and baby corn for fresh consumption and processing
Provedor de dados: 106
Autores: Tavat Lavapauraya; Pramoj  Saritnirand; Surapol Chowchong; Prachum Jutawantana; Suranee Thongluang; Yupapan Chuthathong; Kulvadee Trongpanich.
4 ill., 5 tables
Palavras-chave: Corn; Maize; Sweet corn; Baby corn; Fresh ear corn; Plant breeding; Consumption; Production; ข้าวโพด; ข้าวโพดหวาน; ข้าวโพดฝักอ่อน; ข้าวโพดฝักสด; การปรับปรุงพันธุ์; การบริโภค; การผลิต.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4275

Improvement of corn populations
Provedor de dados: 106
Autores: Charas Kitbamroong; Teerasak Manupeerapan; Yodsaporn Chantachum; Pichet Grudloyma; Somrak Noradechanon; Chakpad Yoonsesaeng; Narongsak Senanarong; Sanit Choowa; Kritchai Jaiserb; Amnuay Tongdee; Pramern Vesurai.
3 tables
Palavras-chave: Corn; Maize; Breeding; Population improvement; ข้าวโพด; การปรับปรุงพันธุ์; การปรับปรุงประชากร.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4564

Improvement of corn varieties in Vietnam
Provedor de dados: 106
Autores: Yo Dinh Long.
2 tables
Palavras-chave: Corn; Maize; Corn improvement; Vietnam; Plant breeding; ข้าวโพด; การปรับปรุงพันธุ์; เวียดนาม.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3730

Improvement of maize populations
Provedor de dados: 106
Autores: Charas Kitbamroong; Yodsaporn Chantachum; Somrak Noradechanon; Pichet Grudloyma; Sompong Tongchuay; Sanit Choowa; Kritchai Jaiserb; Narongsak Senanarong.
7 tables
Palavras-chave: Corn; Maize; Breeding; Population improvement; ข้าวโพด; การปรับปรุงประชากร; การปรับปรุงพันธุ์.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4325

Improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Prakob Jan-aram; Sakol Petchmanee; Vatcharee Lertmongkol; Somrak Noradechanon; Prawit Puddhanon; Boonguer Poosri; Somsri Thaiwesna; Renu Chaisorn; Sirichai Unsrisong; Thongchai Tangpremsri; Kosol Kirdpoksub; Suvit Punsurintr; Anuroj Imsmai; Pratuan Sawangsri; Dusit Jaichareon; Vichitr Benjasil.
24 tables
Palavras-chave: Corn; Maize; Plant breeding; Early maturity; White grain; High oil; Young ear corn; Hybrids; Variety trials; Yields; Quality; ข้าวโพด; การปรับปรุงพันธุ์; พันธุ์เบา; ข้าวโพดสีขาว; ข้าวโพดน้ำมันสูง; ข้าวโพดฝักอ่อน; ข้าวโพดลูกผสม; โครงการความร่วมมือในการวิจัย.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3953

Improvement of yield and quality of corn
Provedor de dados: 106
Autores: Teerasak Manupeerapan; Kittisri Sukapinda; Prawit Puddhanon; Nipon Iamsupasit; Sakol Petchmanee; Prakob Jan-aram; Somrak Noradechanon; Satit Areerak; Sukapong Vayuparp; Wantana Tangpremsri; Lily Kaweeta; Vichit Benjasil.
31 tables
Palavras-chave: Corn; Maize; Plant breeding; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4130

Improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Teerasak Manupeerapan; Sakol Petchmanee; Somrak Noradechanon; Prawit Puddhanon; Permpoon Sarnthoy; Tongchai Tangpremsri; Wantana Tangpremsri; Lily Nimsung; Satit Areerak; Somsri Thaiwesna; Atcharee Rakla; Nipon Iamsupasit; Kittisri Sukapinda; Vichitr Benjasil.
30 tables
Palavras-chave: Corn; Maize; Plant breeding; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; ข้าวโพดสีเหลือง; พันธุ์เบา; ข้าวโพดสีขาว; ข้าวโพดน้ำมันสูง; ข้าวโพดลูกผสม; โครงการความร่วมมือทางการวิจัย.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3749

Improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Teerasak Manupeerapan; Sakol Petchmanee; Somrak Noradechanon; Vatcharee Lertmongkol; Phermphul Sarnthoy; Prawit Puddhanon; Tongchai Tangpremsri; Wantana Tangpremsri; Somsri Thaiwesna; Sirichai Unsrisong; Atcharee Rakla; Nipon Iamsupasit; Nipa Kaewborisutsakul; Chamnan Malaithong; Anuroj Imsmai; Pratuan Sawangsri; Sompob Orndee; Vichitr Benjasil.
21 tables
Palavras-chave: Corn; Maize; Plant breeding; Yield trials; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4083

Improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Teerasak Manupeerapan; Prakob Jan-aram; Sakol Petchmanee; Vatcharee Lertmongkol; Boonguer Poosri; Somrak Noradechanon; Sirichai Unsrisong; Phermphul Sarnthoy; Somsri Thaiwesna; Atcharee Rakla; Prawit Puddhanon; Renu Chaisorn; Tongchai Tangpremsri; Wantana Kittipornpaibool; Nipa Kaewborisutsakul; Pratuan Sawangsri; Chamnan Malaithong; Anek Suwanhong; Sompob Orndee; Vichitr Benjasil.
43 tables
Palavras-chave: Corn; Maize; Plant breeding; Yields; Quality; Variety trials; Yield trials; Agronomic characters; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4005

Improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Sutat Sriwatanapongse; Sansern Jampatong; Boonlum Paysuwan; Chokechai Aekatasanawan; Orakit Prasertkit; Chatpong Balla; Yodchai Petratanagool.
62 tables
Palavras-chave: Corn; Maize; Yields; Quality; Breeding; Elite variety; Inbred; Hybrids; ข้าวโพด; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ; สายพันธุ์แท้; ลูกผสม; พันธุ์ส่งเสริม.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4563

Improvement of yield and quality of corn
Provedor de dados: 106
Autores: Chamnan Chutkaew; Nipon Iamsupasit; Prakob Jan-aram; Sakol Petchmanee; Sirichai Unsrisong; Vatcharee Lertmongkol; Boonguer Poosri; Pismai Srisukphrasert; Somrak Noradechanon; Opas Jantasuk; Acharee Prasarn; Somsri Thaiwesna; Chawana Boonreung; Kosol Kirdpoksub; Pratuan Sawangsri.
19 tables
Palavras-chave: Corn; Maize; Plant breeding; Variety trials; Yields; Agronomic characters; ข้าวโพด; การปรับปรุงพันธุ์; แหล่งของเชื้อพันธุกรรม; โรคราน้ำค้าง; ข้าวโพดน้ำมันสูง; โครงการความร่วมมือ.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3951

Improving Production and Marketing to Enhance Food Security in Mozambique
Provedor de dados: 31
Autores: Tschirley,   David L.; Abdula,   Danilo Carimo; Weber,   Michael T.
Research Results of the Policy Analysis Department, Ministry of Agriculture, Directorate of Economics
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Maize; Food Security and Poverty; Marketing; Q18.
Ano: 2005
URL: http://purl.umn.edu/55248

IMPROVING SOIL MANAGEMENT OPTIONS FOR WOMEN FARMERS IN MALAWI AND ZIMBABWE
Provedor de dados: 30
Autores: S.J.
Palavras-chave: Soil improvement; Soil management; Organic fertilizers; Pigeonpeas; Soil fertility; Research methods; Maize; Weeds; Crop management.
Ano: 2001
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3699

Improving the efficiency of rock phosphate on high pH soils: Results from participatory research in India
Provedor de dados: 21
Autores: Andres, Christian; Mandloi, Lokendra S.; Verma, Rajeev; Gomez, Sara; Nyffenegger, Mirjam R.; Locher, Michael; Patel, Dharmendra; Forster, Dionys; Bhullar, Gurbir S.; Studer, Christoph.
High soil pH levels may limit the availability of phosphorous (P) to crops. In organic farming, the use of synthetic P fertilizers is not allowed. Application of rock phosphate (RP) to crops is one of the alternatives for organic production. However, RP application shows little effect on high pH soils, because the P is not transformed into plant-available forms under alkaline soil conditions.  Aiming at the development of locally adapted solutions, we followed a Participatory Technology Development approach, making use of the local knowledge to identify current practices and associated problems by conducting focus group discussions with organic farmers. Farmers stated that they are facing challenges with a P limitation in their cotton-based production...
Tipo: Conference paper, poster, etc.
Palavras-chave: Systems research and participatory research; Nutrient turnover; Technology transfer.
Ano: 2014
URL: http://orgprints.org/27525/1/Abstract_RP-FYM_HAFLSymp_final.pdf

IN SITU CONSERVATION OF CROP GENETIC RESOURCES IN THE MEXICAN MILPA SYSTEM
Provedor de dados: 31
Autores: Van Dusen,   M. Eric.
This dissertation focuses on the theoretical modeling and empirical testing of household motivations for the in situ conservation of crop genetic resources (CGR). An original household survey is used to test whether the household diversity outcomes are different for the cropping system as a whole, for the principal crop, maize, or for the secondary crops, beans and squash.  Agro-ecological characteristics and market characteristics are found to significantly affect the levels of diversity maintained by households.     A review of the economic literature relevant to modeling in situ conservation is presented.  A theoretical model is developed in which a household's decision to plant a milpa variety is linked to household, agro-ecological, and market...
Tipo: Thesis or Dissertation
Palavras-chave: Crop Production/Industries; Resource /Energy Economics and Policy.
Ano: 2000
URL: http://purl.umn.edu/11941

In vitro pollen viability of maize cultivars at different times of collection
Provedor de dados: 65
Autores: Martins,Emanoel Sanches; Davide,Livia Maria Chamma; Miranda,Gian José; Barizon,Jefferson de Oliveira; Souza Junior,Francisco de Assis; Carvalho,Rafael Pelloso de; Gonçalves,Manoel Carlos.
ABSTRACT: In the present study, we aimed to assess the in vitro viability of pollen grains from maize cultivars collected at different times and days in the field. Four cultivars (Sol da Manhã, XB 6012, XB 8010, and BRS 2020) were evaluated from the second to fifth day of anthesis in three times. Pollen samples were evaluated for their in vitro viability through standard germination test in liquid and solid media and tetrazolium staining. The experimental design was completely randomized, in 4x4x3 split-split plots with four replicates. Data were subjected to analysis of variance followed by a means clustering test and linear regression analysis. The average percentage of viable pollen varied according to the day, collection time, and cultivar. In general,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthesis; Maize pollinization; Zea mays.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200201

In vivo HAPLOID INDUCTION AND EFFICIENCY OF TWO CHROMOSOME DUPLICATION PROTOCOLS IN TROPICAL MAIZE
Provedor de dados: 64
Autores: Couto,Evellyn Giselly de Oliveira; Pinho,Édila Vilela de Resende Von; Pinho,Renzo Garcia Von; Veiga,Adriano Delly; Bustamante,Fernanda de Oliveira; Dias,Kaio Olimpio das Graças.
ABSTRACTArtificial chromosome duplication is one of the most important process in the attainment of doubled haploids in maize. This study aimed to evaluate the induction ability of the inducer line KEMS in a tropical climate and test the efficiency of the R1-Navajo marker by flow cytometry to evaluate two chromosome duplication protocols and analyze the development of the doubled haploids in the field. To accomplish this goal, four genotypes (F1 and F2 generations) were crossed with the haploid inducer line KEMS. The seeds obtained were selected using the R1-Navajo marker and subject to two chromosome duplication protocols. Duplication was confirmed using flow cytometry. The percentages of self-fertilized plants after duplication as well as the quantities...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: R-Navajo; Colchicine; Induction of maternal haploids; Zea mays.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000500435

Inbreeding depression in maize populations of reduced size
Provedor de dados: 63
Autores: Maldonado,Félix Alonso Astete; Miranda Filho,José Branco de.
Inbreeding is a well known phenomenon in living beings and its immediate consequence is the decrease in the expression of quantitative traits, known as inbreeding depression. Selfing is the most common system of inbreeding in plant species; however, little has been studied with other less severe inbreeding systems, such that resulting from small population sizes. The present work consisted of the study of the inbreeding effect on quantitative traits as a consequence of reduced population size under panmixy. Three maize (Zea mays L.) populations were used in this study: P1 -- ITA, population derived from the variety IAC-Taiúba; P2 -- represented by 30 subpopulations already submmited to reduced size (N = 5); and P3 - population derived from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Genetic drift; Effective size.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200020

Inbreeding depression of 28 maize elite open pollinated varieties
Provedor de dados: 74
Autores: Pacheco,Cleso Antônio Patto; Santos,Manoel Xavier dos; Cruz,Cosme Damião; Parentoni,Sidney Netto; Guimarães,Paulo Evaristo de Oliveira; Gama,Elto Eugênio Gomes e; Silva,Álvaro Eleutério da; Carvalho,Hélio Wilson Lemos de; Vieira Júnior,Pedro Abel.
The study of inbreeding depression is important for breeding strategies such as use of inbred progenies or extraction of inbreed lines. A diallel of 28 maize open-pollinated varieties was evaluated in 10 environments in the early 1990s. At the same time, S1 populations for each of the 28 varieties were evaluated in the same 10 experiments (environments). Yield reductions of the populations from S0 to S1 (mean of the 10 environments), varied from 34.6% (CMS-01) to 59.2% (CMS-30), with an average of 49.1%. Inbreeding depression was greater in populations with a wider genetic base, which had never been exposed to inbreeding (CMS-30, BR-107, PH4, Cunha, Saracura, Nitrodent, and Nitroflint). Inbred lines with greater yield means should be obtained from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Inbreeding depression; Endogamy; Maize; Breeding; Diallel.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400014

Inbreeding in two maize subpopulations selected for tassel size
Provedor de dados: 63
Autores: Farias Neto,Austeclinio L. de; Miranda Filho,José Branco de.
The present work was based on the evaluation of full sib and S1 progenies from the maize (Zea mays L.) population ESALQ-PB1 after six cycles of divergent selection for tassel size. The following traits were analyzed: plant height , ear height, tassel branch number, tassel length, and tassel weight. For all traits, the experimental units were means of three plants per plot. Progenies were evaluated in eleven experiments (completely randomized blocks) with three replications in Piracicaba -- SP, Brazil. Means of inbred (m1) and non-inbred (m0) progenies were used to estimate inbreeding depression (I = m1 -- m0) and the contribution of homozygotes (mu0 + a*) and heterozygotes (d*) to the population mean. Considering the five traits under study, inbreeding...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Inbreeding depression; Divergent selection; Tassel characters.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000300018

Incidence and multiplex PCR based detection of trichothecene chemotypes of Fusarium culmorum isolates collected from freshly harvested Maize kernels in Southern India
Provedor de dados: 58
Autores: Venkataramana,M.; Shilpa,P.; Balakrishna,K.; Murali,H.S.; Batra,H.V.
Hundred Fusarium culmorum strains, isolated from freshly harvested maize grain samples from Southern parts of India, were incubated in czapek-dox medium and analyzed for trichothecene (DON/NIV) production. The mPCR assay was standardized targeting trichothecene metabolic pathway genes viz., Tri6, Tri7, Tri13 for detection of trichothecene (DON/NIV) chemotypes and rDNA gene for specific detection of F. culmorum species. Primers for targeted genes were designed and used to predict whether these isolates could produce deoxynivalenol/nivalenol, 94 isolates were able to produce DON/NIV by mPCR assay. Chemical analysis of DON/NIV was carried out for mPCR positive isolates by high performance-thin layer chromatography (HPTLC). To check the practical usefulness of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Deoxynivalenol; Nivalenol; Multiplex PCR assay; HPTLC.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200009

Incidence of aflatoxin in corn
Provedor de dados: 106
Autores: Prisnar Siriacha; Arunsri Wong-Urai; Prawat Tonboon-Ek; Dara Buangsuwon.
5 tables
Palavras-chave: Corn; Maize; Aflatoxins; Fungi; Aspergillus; Fusarium; Botryodiplodia; Penicillium; Contamination; Fields; Storage houses; ข้าวโพด; อะฟลาทอกซิน; เชื้อรา; แอสเปอร์จิลลัส; ฟูซาเรียม; โบทริโอดิพโพลเดีย; เพนนิซิเลียม.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4092

Incidence of aflatoxins in pre and post harvested corn
Provedor de dados: 106
Autores: Prisnar Hemsuchi; Arunsri Wong-Urai; Dara Buangsuwon.
2 tables
Palavras-chave: Corn; Maize; Aflatoxins; Pre-harvest; Post-harvest; Fungi; ข้าวโพด; อะฟลาทอกซิน; วิทยาการก่อนการเก็บเกี่ยว; วิทยาการหลังการเก็บเกี่ยว; เชื้อรา.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4051

Incidência de viroses e enfezamentos e estimativa de perdas causadas por molicutes em milho no Paraná
Provedor de dados: 86
Autores: Oliveira,Elizabeth de; Resende,Renato de Oliveira; Giménez Pecci,María de la Paz; Laguna,Irma Graciela; Herrera,Patricia; Cruz,Ivan.
O objetivo deste trabalho foi avaliar a incidência de viroses e enfezamentos e estimar as perdas causadas por enfezamentos na cultura do milho safrinha. Os diagnósticos baseados em sintomas foram confirmados por PCR ou RTPCR. Em todas as lavouras, foram identificadas plantas com sintomas de enfezamentos, em incidência de 6,2% a 49,9% (média de 20,7%). Na identificação de insetos vetores desses patógenos, a cigarrinha Dalbulus maidis foi detectada em 20 lavouras das 24 amostradas, constituindo 66,6% do total de espécimens de cigarrinhas coletadas. A perda potencial causada pelos enfezamentos no período foi estimada em cerca de 16,5 milhões de dólares. A ocorrência de plantas com sintomas de "Maize rayado fino virus" e "Maize dwarf mosaic virus" foi baixa e...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Espiroplasma; Doença das plantas.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000100003

Incidencia del gusano cogollero Spodoptera frugiperda Smit en Ocoyucan, Puebla y actividad bioinsecticida de semillas de Carica papaya L. y Trichilia havanensis Jacq.
Provedor de dados: 32
Autores: Figueroa Brito, Rodolfo.
El maíz es el principal cultivo de México y constituye la base de la alimentación de la población. Entre los factores que limitan la producción en este cultivo están los insectos plaga, destacando los daños ocasionados por el gusano cogollero Spodoptera frugiperda. Se evaluaron en laboratorio los productos naturales de las semillas de Carica papaya y Trichilia havanensis sobre S. frugiperda y su enemigo natural Chrysoperla carnea. En invernadero, se evaluó el sulfato de amonio (13.6 g), urea (6 g), fosfonitrato (6.56 g) y la vermicomposta con tierra negra (1:3) en bolsas de plástico (6 kg) junto con el extracto acuoso de semillas de C. papaya al 20 % en plantas de maíz. En campo, se entrevistaron 35 productores de maíz del municipio de Ocoyucan, Puebla,...
Palavras-chave: Daño-maíz; Manejo tradicional; Caricaceae; Meliaceae; Productos naturales; Actividad biológica; Efectos secundarios; Chrysoperla carnea; Damage-corn; Traditional management; Natural products; Biological activity; Secondary effects; Doctorado; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2011
URL: http://hdl.handle.net/10521/494

Incidencia del gusano cogollero Spodoptera frugiperda Smit en Ocoyucan, Puebla y actividad bioinsecticida de semillas de Carica papaya L. y Trichilia havanensis Jacq.
Provedor de dados: 32
Autores: Figueroa Brito, Rodolfo.
El maíz es el principal cultivo de México y constituye la base de la alimentación de la población. Entre los factores que limitan la producción en este cultivo están los insectos plaga, destacando los daños ocasionados por el gusano cogollero Spodoptera frugiperda. Se evaluaron en laboratorio los productos naturales de las semillas de Carica papaya y Trichilia havanensis sobre S. frugiperda y su enemigo natural Chrysoperla carnea. En invernadero, se evaluó el sulfato de amonio (13.6 g), urea (6 g), fosfonitrato (6.56 g) y la vermicomposta con tierra negra (1:3) en bolsas de plástico (6 kg) junto con el extracto acuoso de semillas de C. papaya al 20 % en plantas de maíz. En campo, se entrevistaron 35 productores de maíz del municipio de Ocoyucan, Puebla,...
Palavras-chave: Daño-maíz; Manejo tradicional; Caricaceae; Meliaceae; Productos naturales; Actividad biológica; Efectos secundarios; Chrysoperla carnea; Damage-corn; Traditional management; Natural products; Biological activity; Secondary effects; Doctorado; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2011
URL: http://hdl.handle.net/10521/494

Incident light orientation lets C4 monocotyledonous leaves make light work differently
Provedor de dados: 17
Autores: Ana S. Soares; Simon P. Driscoll; Till K. Pellny; Enrique Olmos; Maria Arraba&amp;#xe7;a; Christine Foyer.
Photosynthesis is an important driver of ecosystem sustainability in the face of climate change. Monocotyledonous crop species with C4 photosynthesis such as maize (Zea mays L; corn) and sugar cane are crucial for future food security and biofuel crop requirements, while C4 pasture grasses such as Paspalum are central to natural ecosystems. The global demand for corn will exceed that for wheat and rice by 2020, making it the world&amp;#x27;s most important crop. Light-driven photosynthesis supports plant biomass production, but plants have also evolved safety valve mechanisms that attenuate the absorption of potentially lethal levels of excess light. The array of survival responses that enables leaves to evade photoinhibition is complex and involves...
Tipo: Manuscript
Palavras-chave: Genetics &amp; Genomics; Earth &amp; Environment; Plant Biology.
Ano: 2008
URL: http://precedings.nature.com/documents/1672/version/1

Income and Nutritional Effects of the Commercialization of Agriculture in Southwestern Kenya
Provedor de dados: 31
Autores: Kennedy,   Eileen T.; Cogill,   Bruce.
The commercialization of Agriculture is the cornerstone on economic development in the most developing countries. Yet relatively little is known about the income and nutritional effects of increasing commercial Agriculture. The present study by Eileen Kennedy and Bruce Cogill is the first in a series of studies conducted by IFPRI in Africa, Asia, and Central America to assess the effects of the commercialization of Agriculture on production, consumption, and nutrition status.  In 1983 IFPRI was invited by the government of Kenya to undertake a study of the production and consumption effects of a smallholder sugarcane contracting scheme in Southwestern Kenya. The resulting study is unusual because it uses a random sample of farmers at various stages of...
Tipo: Report
Palavras-chave: Agriculture; Economic aspects; Kenya; South Nynaza District; Food supply; Sugarcane Industry; Corn Industry; Agricultural wages; Agricultural laborers; Nutrition; Cost and standard of living; Nutrition policy; Diseases; Agricultural and Food Policy; Farm Management.
Ano: 1987
URL: http://purl.umn.edu/42174

Income and Poverty Impacts of USAID-Funded Programs to Promote Maize, Horticulture, and Dairy Enterprises in Kenya, 2004-2010
Provedor de dados: 31
Autores: Smale,   Melinda; Mathenge,   Mary K.; Jayne,   Thomas S.; Magalhaes,   Eduardo Castelo; Olwande,   John; Kirimi,   Lilian; Kamau,   Mercy W.; Githuku,   James.
Since 2002, the United States Agency for International Development (USAID) has funded programs to promote maize, dairy, and horticulture enterprises among smallholder farmers in Kenya under the Strategic Objective 7 of Increased Rural Household Incomes. On behalf of USAID, Tegemeo Institute has conducted household surveys to help track key indicators that monitor progress in the implementation of these programs. The first survey was conducted in 2004. Subsequent surveys were conducted every two years (i.e., 2006, 2008, and 2010). The sample comprises households participating and those not participating in the programs. The programs monitored include the Kenya Maize Development Program (KMDP), the Kenya Horticulture Development Project (KHDP), and the Kenya...
Tipo: Working Paper
Palavras-chave: Kenya; Income; Poverty; Household surveys; International Development; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2012
URL: http://purl.umn.edu/121864

Income and Price Elasticities of Food Demand and Nutrient Consumption in Malawi
Provedor de dados: 31
Autores: Ecker,   Olivier; Qaim,   Matin.
Widespread malnutrition in developing countries calls for appropriate interventions, presupposing good knowledge about the nutritional impacts of policies. Little previous work has been carried out in this direction. We present a comprehensive analytical framework, which we apply for Malawi. Using household data and a demand systems approach, we estimate income and price elasticities of food, calorie, and micronutrient consumption. These estimates are used for policy simulations. Given multiple nutrient deficiencies, income-related policies are better suited than price policies to improve nutrition. While consumer subsidies for maize increase calorie and mineral consumption, they contribute to a higher prevalence of vitamin deficiencies.
Tipo: Conference Paper or Presentation
Palavras-chave: Quadratic almost ideal demand system; Food security; Micronutrient malnutrition; Calorie elasticities; Nutrient elasticities; Malawi; Food Consumption/Nutrition/Food Safety.
Ano: 2008
URL: http://purl.umn.edu/6349

Incorporating different proportions of exotic maize germplasm into two adapted populations
Provedor de dados: 74
Autores: Santos,Manoel Xavier dos; Pollak,Linda Maria; Pacheco,Cleso Antônio Patto; Guimarães,Paulo Evaristo Oliveira; Peternelli,Luiz Alexandre; Parentoni,Sidney Netto; Nass,Luciano Lourenço.
Maize breeders frequently wish to use exotic germplasm in their breeding programs without losing specific characteristics of their adapted material. The objective of this study was to determine the optimal proportions of exotic germplasm to incorporate into adapted populations (F2 = 50% exotic, BC1 = 25% exotic, BC2 = 12.5% exotic and BC3 = 6.25% exotic) to form the initial foundation population and to determine the heterosis between adapted x exotics. We used six exotic populations of different origins and two adapted populations representing a Brazilian heterotic pattern. In 1993-94 and 1994-95, the parents, F1, F2, BC1, BC2, BC3 and four checks were evaluated in six environments in central Brazil using an 8 x 9 simple rectangular lattice design. Higher...
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000200033

Increased transient genetic transformation in immature embryos of Brazilian BR 451 maize co-cultivated with Agrobacterium tumefaciens
Provedor de dados: 1
Autores: Didoné, Dielli Aparecida; Silva, Marília Rodrigues de; Ceccon, Cassia Canzi; Teixeira, Tiago; Suzin, Marilei; Grando, Magali Ferrari.
 Genetic engineering has amplified the possibilities of crop breeding and supported sustainability ideals. Agrobacterium tumefaciens is the preferred transformation system, since it produces transgenic plants with more stable transgene expression and inheritance. The agrobacteria and plant tissue must be co-cultivated in conditions that allow gene transfer. This study aimed to evaluate how co-cultivation time and temperature affect the transformation of immature maize embryos of the Hi-II hybrid (model genotype) and the Brazilian BR 451 variety with A. tumefaciens EHA101:pTF102. The pTF102 plasmid carries a uidA reporter gene that enables transient transformation to be quickly verified by GUS histochemical assays. Increasing the co-cultivation period from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.01.03.00-8 Fitotecnia agrobacteria; GUS histochemical assay; Genetic engineering; Zea mays. Biotecnologia Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36475

Increased transient genetic transformation in immature embryos of Brazilian BR 451 maize co-cultivated with Agrobacterium tumefaciens
Provedor de dados: 1
Autores: Didoné, Dielli Aparecida; Silva, Marília Rodrigues de; Ceccon, Cassia Canzi; Teixeira, Tiago; Suzin, Marilei; Grando, Magali Ferrari.
 Genetic engineering has amplified the possibilities of crop breeding and supported sustainability ideals. Agrobacterium tumefaciens is the preferred transformation system, since it produces transgenic plants with more stable transgene expression and inheritance. The agrobacteria and plant tissue must be co-cultivated in conditions that allow gene transfer. This study aimed to evaluate how co-cultivation time and temperature affect the transformation of immature maize embryos of the Hi-II hybrid (model genotype) and the Brazilian BR 451 variety with A. tumefaciens EHA101:pTF102. The pTF102 plasmid carries a uidA reporter gene that enables transient transformation to be quickly verified by GUS histochemical assays. Increasing the co-cultivation period from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agrobacteria; GUS histochemical assay; Genetic engineering; Zea mays.; Biotecnologia Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/36475

Increasing Kenya's Agricultural Competitiveness: Farm Level Issues
Provedor de dados: 31
Autores: Nyoro,   James K.; Wanzala,   Maria N.; Awuor,   Tom.
The objective of this paper is to address the farm level issues that affect the production costs and so the competitiveness of domestic food and commercial production. It compares domestic production prices of key food commodities with the equivalent parity prices to assess the extent to which the domestic prices for maize, wheat, and sugar, and export and domestic crops are competitive. This paper identifies and assesses the factors that influence domestic production costs. It also identifies strategies that could increase food and export crops’ productivity, by that reducing production costs and encourage competitiveness of the domestic production.
Tipo: Working or Discussion Paper
Palavras-chave: Food Security; Food Policy; Kenya; Maize; Wheat; Sugar; Marketing; Q18.
Ano: 2001
URL: http://purl.umn.edu/55151

Increasing world food prices: blessing or curse?
Provedor de dados: 31
Autores: Matovu,   John Mary; Twimukye,   Evarist P.
This study evaluates the potential impact of the recent world food prices on the Ugandan economy and possible policy options to respond to it. Uganda is largely a net exporter of some cereals whose prices increasing considerably especially maize. Using a recursive dynamic CGE model, we attempt to answer questions on who are the beneficiaries and losers after the surge in food prices. The rural producers of maize tend to benefit considerably with their poverty levels reducing. On the other hand, the urban purchasers of cereals are affected owing to the higher prices of food. this therefore suggests that the Ugandan government should take advantage of the increasing food prices by stimulating and undertaking policies that would enhance productivity...
Tipo: Report
Palavras-chave: Urban poor; Food prices; CGE model; Food security; Matovu; Twimukye; Economic Policy Research centre; Agribusiness; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; Consumer/Household Economics; Crop Production/Industries; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Livestock Production/Industries; Production Economics.
Ano: 2009
URL: http://purl.umn.edu/54804

Incremento en el precio del maíz y efectos sobre la oferta de carne de res a nivel de granja.
Provedor de dados: 32
Autores: Hernández Zarco, Alfonso.
La actividad pecuaria es de gran importancia socioeconómica para el país; la ganadería, en específico la producción de carne, es la actividad más diseminada en el sector rural. Se estima que la superficie aprovechada por la ganadería es superior a 110 millones de hectáreas, aproximadamente 60% del terrritorio nacional (SAGARPA, 2000).  En el presente trabajo se estiman los efectos que se tiene sobre las cantidades ofrecidas de carne de res a nivel de granja ante un incremento en el precio del maíz, sorgo y pan. Los incrementos utilizados sobre los precios de los granos fueron del 5%, 10% y 15%, estos son ingredientes básicos en la dieta de bovinos. De igual manera, se realizo un cuestionario verbal con engordadores de Coatlinchan Texcoco edo. de México...
Palavras-chave: Ganadería; Superficie; Precio; Cantidad; Elasticidad; Incremento; Livestock; Area; Price; Quantity; Elasticity; Increase; Economía; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1858

Index selection of tropical maize genotypes for nitrogen use efficiency
Provedor de dados: 53
Autores: Granato,Ítalo Stefanine Correia; Bermudez,Felipe Pereira; Reis,Gabriel Gonçalves dos; Dovale,Julio César; Miranda,Glauco Vieira; Fritsche-Neto,Roberto.
Nitrogen (N) limitation in maize crops is related to the fact that the efficiency of nitrogen fertilization in maize does not exceed 50%, primarily due to volatilization, denitrification and soil leaching. Therefore, the development of new nitrogen use efficient (NUE) cultivars is necessary. The aim of the present study was to develop indices for the accurate selection of NUE maize genotypes for use in conditions of both high and low N availability. The experiment was conducted in a greenhouse (20º45'14"S; 42º52'53"W) at the Federal University of Viçosa during October 2010. A total of 39 experimental hybrid combinations and 14 maize lines differing in NUE were evaluated under two N availability conditions. We determined the relative importance of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; NUE; Maize improvement.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052014000200009

Indexing participation in the market economy through factor analysis: Implications for food security
Provedor de dados: 31
Autores: Makhura,   Moraka T.; Goode,   M.F.; Coetzee,   Gerhard K.
The paper aims to determine patterns used by emerging farmers to participate in the market economy. The eight components of participation (six crop sales, livestock sales and off-farm earnings) were subjected to factor analysis. The results indicate that there are five sources of market participation; viz. sales of staples, cash crops, snacks, livestock and off-farm earnings. That is, participation in the market through one of the sources may or may not be preconditioned by another source. Implications for food security are that commercialisation of both maize and beans should be promoted to ensure starch and protein intake respectively, while cotton and vegetables will provide income and employment, livestock as a food risk management base, and off-farm...
Tipo: Journal Article
Palavras-chave: Food Security and Poverty.
Ano: 1997
URL: http://purl.umn.edu/54446

INDICADORES AGRICOLAS DAS LAVOURAS DE SUBSISTÊNCIA FINANCIADAS PELO PRONAF NO ESTADO DO CEARÁ
Provedor de dados: 31
Autores: Oliveira,   Renato Alves De; Lima,   Patricia Veronica Pinheiro Sales; Casimiro Filho,   Francisco; Martins,   Espedito Cezario.
O objetivo deste estudo foi analisar a influência do PRONAF - Programa Nacional de Fortalecimento da Agricultura Familiar sobre os indicadores agrícolas: produção, área plantada e produtividade das lavouras de subsistências beneficiadas pelo Programa no Estado do Ceará, no período de 1999 a 2005. A pesquisa aplicou análises tabular e gráfica para estudar o comportamento das variáveis. Os resultados registraram que as lavouras de subsistência mais beneficiadas pelo Programa foram: algodão, arroz, cana-de-açúcar, feijão, mandioca e milho. Uma comparação destas lavouras com outras não beneficiadas: banana, castanha de caju e mamona revelou que apesar do financiamento as lavouras beneficiadas pelo PRONAF obtiveram um desempenho inferior ao das não beneficiadas...
Tipo: Conference Paper or Presentation
Palavras-chave: Produção; Produtividade; PRONAF; Production; Productivity; Productivity Analysis.
Ano: 2008
URL: http://purl.umn.edu/108632

Indicadores físicos de un suelo bajo labranza de conservación y su relación con el rendimiento de tres cultivos.
Provedor de dados: 32
Autores: Navarro Bravo, Agustín.
El manejo físico o laboreo del suelo se hace para crear condiciones óptimas en la zona de raíces de las plantas, a través de una adecuada estructura, porosidad, infiltración y retención de agua, entre otras, que son importantes para el manejo sustentable del recurso suelo. Para la identificación de indicadores físicos del suelo para la producción de cultivos, se utilizaron técnicas tradicionales y no destructivas de análisis tales como: la reflectometría de dominio del tiempo (TDR) y el penetrómetro de ultrasonido (PU) que garantizan la medición rápida de algunas propiedades físicas del suelo. Bajo este enfoque, se evaluó un agroecosistema de haba-maíz-frijol en rotación manejado con labranza de conservación, en el Colegio de Postgraduados, Montecillo,...
Palavras-chave: Estructura del suelo; Rendimiento de grano; Sostenibilidad; Grain yield; Soil structure; Sustainability; Doctorado; Edafología.
Ano: 2010
URL: http://hdl.handle.net/10521/60

Indicadores físicos de un suelo bajo labranza de conservación y su relación con el rendimiento de tres cultivos.
Provedor de dados: 32
Autores: Navarro Bravo, Agustín.
El manejo físico o laboreo del suelo se hace para crear condiciones óptimas en la zona de raíces de las plantas, a través de una adecuada estructura, porosidad, infiltración y retención de agua, entre otras, que son importantes para el manejo sustentable del recurso suelo. Para la identificación de indicadores físicos del suelo para la producción de cultivos, se utilizaron técnicas tradicionales y no destructivas de análisis tales como: la reflectometría de dominio del tiempo (TDR) y el penetrómetro de ultrasonido (PU) que garantizan la medición rápida de algunas propiedades físicas del suelo. Bajo este enfoque, se evaluó un agroecosistema de haba-maíz-frijol en rotación manejado con labranza de conservación, en el Colegio de Postgraduados, Montecillo,...
Palavras-chave: Estructura del suelo; Rendimiento de grano; Sostenibilidad; Grain yield; Soil structure; Sustainability; Doctorado; Edafología.
Ano: 2010
URL: http://hdl.handle.net/10521/60

Industrial utilization of sorghum in India
Provedor de dados: 30
Autores: Ulrich Kleih.
Palavras-chave: Sorghum; Starch; Alcohols; Grain; Molasses; Maize; Coarse grains; Barley; Contract farming; Cereals.
Ano: 2000
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3150

Industrial utilization of sorghum in India
Provedor de dados: 30
Autores: Kleih, U.
Palavras-chave: Sorghum; Starch; Alcohols; Grain; Molasses; Maize; Coarse grains; Contract farming; Cereals; Barley.
Ano: 2000
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3316

Industrial utilization of sorghum in India / U. Kleih
Provedor de dados: 30
Autores: U.
Palavras-chave: Sorghum; Starch; Alcohols; Grain; Molasses; Maize; Coarse grains; Barley; Contract farming; Cereals.
Ano: 2000
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4223

Infestation maps and spatial stability of main weed species in maize culture
Provedor de dados: 87
Autores: Calha,I.M.; Sousa,E.; González-Andújar,J.L.
A study on the spatial distribution of the major weeds in maize was carried out in 2007 and 2008 in a field located in Golegã (Ribatejo region, Portugal). The geo-referenced sampling focused on 150 points of a 10 x 10 m mesh covering an area of 1.5 ha, before herbicide application and before harvest. In the first year, 40 species (21 botanical families) were identified at seedling stage and only 22 during the last observation. The difference in species richness can be attributed to maize monoculture favouring reduction in species number. Three of the most representative species were selected for the spatial distribution analysis: Solanum nigrum, Chenopodium album and Echinochloa crus-galli. The three species showed an aggregated spatial pattern and spatial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geo-statistics; Kriging; Precision agriculture; Chenopodium album; Echinochloa crus-galli; Solanum nigrum.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200004

In-field rates of decomposition and microbial communities colonizing residues vary by depth of residue placement and plant part, but not by crop genotype for residues from two Cry1AB Bt corn hybrids and their non-transgenic isolines.
Provedor de dados: 18
Autores: Londono-R, L; Tarkalson, D.D.; Thies, Janice E.
The adoption of Bt corn has been largely overshadowed by concerns about their unintended effects on human health and the environment. Residues of transgenic Bt crops decomposed more slowly than their non-transgenic isolines in one laboratory study, although no mechanism to explain these observations was proposed. If Bt crop residues were to decompose more slowly in field soils, changes in carbon cycling and nutrient availability could result. We compared the in-field decomposition rates and diversity of decomposers colonizing residues of two Cry1Ab Bt corn hybrids, active against the European corn borer, with their non-transgenic isolines in litterbags placed in a Nebraska field. After five months, we found no significant differences in either the rates of...
Tipo: Article
Palavras-chave: Corn / maize; Soil quality.
Ano: 2013
URL: http://eprints.nwisrl.ars.usda.gov/1476/1/1441.pdf

Influence of compost and digestates on plant growth and health: potentials and limits
Provedor de dados: 21
Autores: Fuchs, Jacques G.; Berner, Alfred; Mayer, Jochen; Smidt, Ena; Schleiss, Konrad.
Composts can influence soil fertility and plant health. These influences can be positive or negative, depending of the quality of the composts. In order to estimate the potential of Swiss composts to influence soil fertility and plant health, one hundred composts representative of the different composting systems and qualities available on the market were analyzed.  The organic substance and the nutrient content of the composts varied greatly between the composts; the materials of origin were the major factor influencing these values. The respiration rate and enzyme activities also varied greatly, particularly in the youngest composts. These differences decreased when the composts become more mature. Maturity, the degradation stage of the organic matter,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil biology Composting and manuring Crop health; Quality; Protection.
Ano: 2008
URL: http://orgprints.org/17977/1/fuchs%2Detal%2D2008%2Dcodis.pdf

Influence of Compost Supplemented with Jatropha Cake on Growth, Dry Matter Accumulation and Nutrient Uptake of Maize (Zeamays L.)
Provedor de dados: 21
Autores: Abayomi, Olowoake Adebayo.
The potentials of compost supplemented with jatropha cake as soil amendments were evaluated under screenhouse at Kwara State University. Maize (variety EVDT-W99 STR) was used as test crop. The experiment consisted of two consecutive experiments in which residual effect was observed in the second experiment. The treatment were; control (Zero addition), NPK 15 –15-15 at 60 kg N/ha, 30% Grade B + 70% Jatropha cake at 1.5, 2.0 and 2.5 t /ha, 40% Grade B + 60% Jatropha cake at 1.5, 2.0 and 2.5 t /ha,  50% Grade B + 50% Jatropha cake  at 1.5, 2.0 and 2.5 t /ha, 60% Grade B + 40% Jatropha cake at 1.5, 2.0 and 2.5 t /ha . The design was completely randomized design replicated three times. Results obtained showed that 50% Grade B + 50% Jatropha cake greatly...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil.
Ano: 2018
URL: http://orgprints.org/32885/7/32%20Olowoake%20Adebayo%20Article.pdf

Influence of crop-livestock systems with Zea mays L. and Brachiaria brizantha on the corn productivity variables
Provedor de dados: 22
Autores: Ramella, João Ricardo Pompermaier; Battistus, André Gustavo; da Silva, Cristiano; Libardi, Keli Daiana Cristina; Castagnara, Deise Dalazen; de Oliveira, Paulo Sérgio Rabello; Neres, Marcela Abbado.
 Mixed systems of exploitation of crop and livestock have called attention to the advantages over isolated systems of farming or ranching. Therefore, the objective of this study was to evaluate the influence of seeding rates of Brachiaria brizantha (0.0; 5.0; 10.0 e 15.0 kg ha-1) in the variables of corn productivity and B. brizantha plant stand when cultivated in the consortium. The experiment was established in a randomized complete block design with four replications using the maize cultivar Pioneer 30K64Y sown under the spacing of 0.90 m between rows. We evaluated the number of kernel rows, number of kernels per row, ear length, ear diameter, ear height, plant height, plant population and productivity in corn, as well as plant stand in B. brizantha....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Produtividade; Densidade de semeadura.
Ano: 2013
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/7016

Influence of different iron availability on phosphoenolpiruvate carboxilase and malate dehydrogenase in roots of maize (Zea Mays L.) plants grown under iron deficiency
Provedor de dados: 17
Autores: Marco Antonio Russo; Adalgisa Belligno.
The effect of the different nitrate availability on some enzymatic activities has been evaluated in iron deficient and iron sufficient maize plants (Zea mays L.). In order to evaluate if the induction of sensitive to pH enzymatic activities is affected by the variation of the apoplast reaction due to the different nitrate availability, two experimental tests were done on maize plants grown in nutrient solution with different NO3- availability and with Fe-sufficiency (+Fe) (added with 80 uM Fe(III)-EDTA) and Fe-deficiency (-Fe) (added with 0.1 uM Fe(III)-EDTA).&amp;#xd;&amp;#xa;As regards 0.4 mM NO3- (NS2), independently of iron availability, phosphoenolpiruvate carboxilase and malate dehydrogenase inductions are higher than those recorded for the...
Tipo: Manuscript
Palavras-chave: Plant Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4175/version/1

Influence of high-dose gamma radiation and particle size on antioxidant properties of Maize ( Zea mays L.) flour
Provedor de dados: 60
Autores: Nawaz,Haq; Shad,Muhammad Aslam; Rehman,Tanzila; Ramzan,Ayesha.
ABSTRACT Influence of high-dose gamma radiation and particle size on antioxidant properties of maize (Zea mays L.) flour was studied using response surface methodology. A central composite design based on three levels of each of particle size, in terms of mesh number (40, 60 and 80 meshes), and gamma radiation dose (25, 50 and 75 kGy) was constructed. A statistically significant dose-dependent decrease (p&lt;0.05) in antioxidant properties of gamma irradiated flour was observed. However, an increase in the mesh number (decrease in particle size of flour) resulted in an increase in antioxidant properties. The optimum level of radiation dose to achieve maximum value of responses was found to be 50 kGy for Trolox equivalent total antioxidant activity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize flour/antioxidant properties; Maize flour/gamma irradiation/effects; Central composite design; Maize flour/particle size; Response surface methodology; Zea mays L.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502016000400771

Influence of inorganic and organic fertilization on microbial biomass carbon and maize yield in two soils of contrasting pH
Provedor de dados: 115
Autores: Arrieche-Luna,Elena; Ruiz-Dager,Magaly.
Inappropriate soil management practices that have been applied in the Yafacuy River basin, Venezuela, have led to the loss of soil organic matter and crop productivity. The incorporation of composted organic residues has been suggested as an alternative management practice in order to increase organic matter (OM) content and crop yield in these soils. The objective of this study was to determine the effects of different application fates of an organic fertilizer obtained from sugarcane industry wastes, filter cake and bagasse with or without inorganic fertilizers, on microbial biomass carbon (MB-C), soil organic carbon (SOC), maize (Zea mays L.) yield and N, P, K content in the maize leaves, in Yafacuy River basin. The experiments were established in an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize yield; Organic fertilization; Soil microbial biomass carbon; Soil organic carbon; Sugar cane filter cake.
Ano: 2010
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952010000300001

Influence of planting methods on root development, crop productivity and water use efficiency in maize hybrids
Provedor de dados: 117
Autores: B. Khan,Muhammad; Yousaf,Farhan; Hussain,Mubshar; W. Haq,Muhammad; Lee,Dong-J; Farooq,Muhammad.
Optimum planting methods better ensure water and nutrient supply through improved root development resulting in better crop growth and productivity. This study was conducted to evaluate the effects of planting methods on root development, crop allometry, water use efficiency (WUE), productivity and economic returns of different maize (Zea mays L.) hybrids. Maize hybrids NK-6621, Pioneer-30Y87, and Pioneer-30Y58 were sown on beds, ridges, and flat surface. Ridge sowing was better followed by bed sowing; while amongst the hybrids, 'Pioneer-30Y87' performed the best. Well-developed root system, with longer primary root, more number of lateral roots and higher root growth rate, was observed in 'Pioneer-30Y87' planted on ridges, which led to higher WUE, grain...
Tipo: Journal article
Palavras-chave: Allometry; Planting methods; Root growth rate; Water use efficiency.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000400015

Influence of production and cultural practices on grain yields of  corn and sorghum
Provedor de dados: 106
Autores: Jansamoot Sarakul; Nipon Iamsupasit.
5 tables
Palavras-chave: Corn; Maize; Sorghum; Cultural practices; Production; Planting methods; Downy mildew; Varieties; Plant population; Planting methods; Irrigation timing; Yields; ข้าวโพด; ข้าวฟ่าง; การเพาะปลูก; การให้ผลผลิต; โรคราน้ำค้าง; ความหนาแน่นของประชากร; การใส่ปุ๋ย.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3924

Influence of row spacing reduction on maize grain yield in regions with a short summer
Provedor de dados: 86
Autores: Sangoi,Luís; Ender,Márcio; Guidolin,Altamir Frederico; Almeida,Milton Luiz de; Heberle,Pedro Canísio.
The interest in reducing maize row spacing in the short growing season regions of Brazil is increasing due to potential advantages such as higher radiation use efficiency. This experiment was conducted to evaluate the effect of row spacing reduction on grain yield of different maize cultivars planted at different dates. The trial was conducted in Lages, in the State of Santa Catarina, Brazil, during 1996/97 and 1997/98 growing seasons, in a split-split plot design. Early (October 1st) and normal (November 15) planting dates were tested in the main plot; two morphologically contrasting cultivars (an early single-cross and a late double-cross hybrids) were evaluated in the split plots and three row widths (100, 75 and 50 cm) were studied in the split-split...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Hybrids; Sowing date; Crop management.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000600003

Influence of seed treatment on the initial development of maize and wheat seedlings inoculated with Azospirillum brasilense
Provedor de dados: 22
Autores: Dartora, Janaína; Guimarães, Vandeir Francisco; Marini, Deniele; Pinto Júnior, Artur Soares; Magalhães Cuz, Leonardo; Mensch, Reginaldo.
The aim of this study was to evaluate the interaction between the seed treatment with fungicides and insecticides and inoculation with Azospirillum brasilense and their effect on seed germination and early development of seedlings of maize and wheat. Two experiments were conducted with corn seeds and the other with wheat. The experimental design used in both trials was completely randomized design with four replications and treatments arranged in a 2x6 factorial, with the absence and presence of seed treatment and seed inoculated with different strains of A. brasilense: no inoculation, Ab-V5, Ab-V6, Hm53, SFO and IC26. In addition to the standard germination test (germination percentage int the first count and percentage of germination) were evaluated root...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fungicidas; Rizobactérias; Massa seca de raízes.
Ano: 2013
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/5809

Influence of some environmental factors on Pythium stalk rot of maize
Provedor de dados: 106
Autores: Diwaker, M.C.; Payak, M.M.; Renfro, B.L.
8 tables
Palavras-chave: Corn; Maize; Pythium; Stalk rot; Environmental factors; ข้าวโพด; โรคลำต้นเน่า; ไพเธียม สตอล์ค รอท.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3904

Influence of sulphur in crop rotation pattern (Maize-Mungbean)
Provedor de dados: 106
Autores: Pradit Boonampol; Wiroj Wajananawat.
7 tables
Palavras-chave: Corn; Maize; Mungbeans; Cropping systems; Sulphur; Crop rotation; ข้าวโพด; ถั่วเขียว; การปลูกพืชหมุนเวียน; กำมะถัน.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4360

Influence of temperature and diet on the development of Ulomoides dermestoides (Fairmaire, 1893) (Coleoptera, Tenebrionidae, Diaperinae)
Provedor de dados: 52
Autores: Marinoni,Renato C.; Ribeiro-Costa,Cibele S.
Ulomoides dermestoides (Fairmaire, 1893) develops in stored food products (peanuts, maize, oats, rice, sorghum, etc.) and breeds successfully in the laboratory. To determine the best conditions for development, experiments were set up in different temperatures and diets, similar to storage conditions of peanuts (Arachis hypogaea L.). The higher viability of individuals and the shorter developmental time were observed in the diet composed of hulls and seeds of fruits at 21 and 24°C.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coleoptera; Ulomoides dermestoides; Peanuts; Diet; Temperature; Moisture.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000200004

Influence of Tillage Systems on Diversity and Abundance of Insect and Nematode Pests of Maize in Malete, Kwara State, Nigeria
Provedor de dados: 21
Autores: Aderolu, IA; Lawal, OO; Wahab, AA; Alabi, KO; Osunlola, OS; Giwa, MA.
Pests are major biotic factors causing up to 45% yield reduction in maize production in sub-Saharan Africa. To develop improved methods for maize management, the species and abundance of insects and nematodes associated with ten quality protein maize varieties (QPMVs) were evaluated with two commonly used tillage practices, ‘plough only plots (POP)’ and ‘plough and harrow plots (PAHP)’. The experiment was carried out using QPMVs at the Teaching and Research Farm of the Kwara State University, Malete, Nigeria, and arranged in a randomized complete block design with 11 treatments replicated 3 times, including local check “pambo”. A total of 833.1±4.0 and 799.3±3.4 arthropods specimens were collected from POP and PAHP, respectively, comprising 8 orders and 18...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil tillage.
Ano: 2018
URL: http://orgprints.org/33650/4/6%20Aderolu%20IA%20Article.pdf

Influence of Water Mulches on Soil Temperatures and Sweet Corn and Green Bean Production
Provedor de dados: 18
Autores: Bowers, S.A.
Tipo: Article
Palavras-chave: Bean / dry bean; Corn / maize; Mass Import - autoclassified (may be erroneous).
Ano: 1968
URL: http://eprints.nwisrl.ars.usda.gov/613/1/82.pdf

Influência da inoculação de fungos micorrízicos arbusculares, da acidez do solo e de fontes de fósforo no crescimento do milho
Provedor de dados: 1
Autores: Costa, Telma Aparecida; Universidade Paranaense; Pintro, Jose Carlos; UEM; Silva, Eraldo Schunk; UEM; Gomes da Costa, Sandra Maria; UEM.
O objetivo deste estudo foi avaliar o efeito da inoculação de fungos micorrízicos arbusculares (FMA) exóticos, da acidez do solo e de fontes de fósforo no crescimento e na composição mineral de plantas de milho, Zea mays L. (Poaceae). O delineamento experimental foi em blocos ao acaso em esquema fatorial (2x2x2), correspondendo a dois níveis de V% (21 e 60%), duas fontes de P (Na2H2PO4, Ca3 (PO4)2), inoculado e não-inoculado com FMA, com cinco repetições. A inoculação proporcionou maiores concentrações de P, K e de Cu, nas folhas de milho, diminuindo os efeitos da acidez do solo em fonte solúvel de P. O solo corrigido favoreceu o crescimento radical, o aumento da concentração de Mg nas folhas, o aumento da matéria seca da parte aérea e a diminuição de Mn...
Palavras-chave: 5.00.00.00-4    Ciências Agrárias solo ácido; Calagem; Fósforo; Scutellospora pellucida; Scutellospora heterogama; Glomus diaphanum; Zea mays 5.00.00.00-4    Ciências Agrárias.
Ano: 2002
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2425

Influência da radiação solar sobre os valores de produtividade da cultura do milho, Zea mays L., simulados pelo modelo CERES-Maize
Provedor de dados: 1
Autores: Freitas, Paulo Sérgio Lourenço de; UEM; Mantovani, Everardo C.; UFV; Rezende, Roberto; UEM; Gonçalves, Antônio Carlos Andrade; UEM; Bertonha, Altair; UEM.
Para a simulação dos valores da produtividade da cultura do milho, Zea mays (Poaceae), para análise do presente trabalho, utilizou-se o modelo CERES-Maize que está inserido no pacote DSSAT 3.0. Nas simulações realizadas para o município de Janaúba, Estado de Minas Gerais, foi utilizado o cultivar de milho BR-201-Embrapa. Os valores foram simulados para data de semeadura 15 de maio, e a cultura não foi submetida à estresse de água durante seu ciclo. Os valores foram simulados utilizando dados climáticos do período de 1977 a 1995. Foram analisados os valores de radiação solar nos anos em que ocorreram máxima e mínima produtividade, e também em dois anos em que as produtividades foram semelhantes. Os valores da radiação solar influenciaram na produtividade da...
Palavras-chave: 5.00.00.00-4 Ciências Agrárias simulação; Modelo CERES-Maize; Radiação solar; Produtividade 5.00.00.00-4 Ciências Agrárias.
Ano: 2001
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2606

Influência da uniformidade de aplicação de água e da lâmina de irrigação na produção da cultura do milho
Provedor de dados: 1
Autores: Freitas, Paulo Sergio Lourenço de; UEM - Maringá; Mantovani, Everardo Chartuni; UFV; Sediyama, Gilberto Chohaku; UFV; Costa, Luiz Claudio; UFV.
Avaliaram-se, no experimento, os efeitos de duas uniformidades, uma alta (&gt; 80%) e a outra baixa ( &lt; 70%), com o coeficiente de uniformidade de Christiansen de aproximadamente 82 e 67%, respectivamente, na aplicação da lâmina de água por meio de um sistema de irrigação por aspersão convencional e cinco lâminas de água na cultura do milho, Zea mays L. (Poaceae). O tratamento com a lâmina de água adequada foi denominado de L1, e os demais, L2, L3, L4 e L5, receberam lâminas de água relativas ao tratamento L1, da seguinte forma: 50, 75 125 e 150%, respectivamente. A semeadura foi realizada no dia 17 de maio e a colheita, no dia 23 de novembro de 1999. Utilizou-se o cultivar BR 201. A uniformidade de aplicação de água, 84 e 67%, para os tratamentos L1A e...
Palavras-chave: 5.00.00.00-4    Ciências Agrárias uniformidade de aplicação; Lâmina de irrigação; Cultura do milho 5.00.00.00-4    Ciências Agrárias.
Ano: 2002
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2270

Influência de adubação NPK no milho, em terra roxa estruturada (Altamira - zona do rio Xingu).
Provedor de dados: 14
Autores: CRUZ, E. de S.; SOUSA, G. F. de; BASTOS, J. B.
bitstream/item/162581/1/FL01758-.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Terra roxa estruturada; Zona do Xingu; Altamira; Pará; Brasil; Maize; Fertilizer; Yield; Structured brown soil.; Adubação; Milho; Produtividade.; Amazonia.
Ano: 1971
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375796

Influencia de adubação NPK no milho em terra roxa estruturada (Altamira - Zona do Xingu).
Provedor de dados: 14
Autores: CRUZ, E. de S.; SOUSA, G. F. de; BASTOS, J. B.
bitstream/item/152489/1/Comunicado13.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Terra roxa estruturada; Zona do Xingu; Altamira; Pará; Brasil; Maize; Fertilizer.; Adubação; Milho.; Amazonia.
Ano: 1971
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376744

Influência de diferentes doses de corretivo e de camadas de correção da acidez de um neossolo litólico distrófico na produção de matéria seca de milho
Provedor de dados: 1
Autores: Pintro, Jose Carlos; UEM; Inoue, Tadeu Takeyoshi; UEM; Tormena, Cássio Antonio; UEM; Costa, Antônio Carlos Saraiva da; UEM; Sengik, Erico; UEM.
O efeito de diferentes doses e profundidades de correção da acidez de um solo na produção de matéria seca de plantas de milho foi estudado sob condições controladas. Com o aumento das doses de corretivo, houve aumento nos valores de pH (CaCl2) e de saturação por bases. Por outro lado, houve redução nos valores de alumínio trocável. Os valores de produção de matéria seca da parte aérea e das raízes foram significativamente superiores em relação à testemunha. Com o aumento da profundidade de correção, houve aumento nos valores de produção de matéria seca total das plantas de milho. Por outro lado, para uma mesma profundidade de correção, não houve diferença significativa entre os diferentes valores de saturação por bases (V). Mesmo que o milho tenha...
Palavras-chave: 5.00.00.00-4    Ciências Agrárias acidez; Calagem; Saturação por bases; Matéria seca  Zea mays 5.00.00.00-4    Ciências Agrárias.
Ano: 2000
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2864

Influencia de diferentes manejos agrícolas sobre el crecimiento radical y su relación con la agregación del suelo.
Provedor de dados: 32
Autores: Torres Guerrero, Carlos Alberto.
Los suelos de México han sido degradados en los últimos años en buena parte por la acción del hombre. Debido a las prácticas agronómicas empleadas en la mayor parte del país (labranza convencional, monocultivos y remoción de residuos vegetales de cosechas anteriores) los suelos con potencial agrícola se han visto disminuidos en su productividad. La Agricultura de Conservación (AC) ofrece un aprovechamiento sustentable del recurso suelo, asegurando su estabilidad y estructura, con el propósito de aumentar los rendimientos de los cultivos. El experimento que se reporta es de larga duración. Se inició en 1991 en el Batán Texcoco, Estado de México, en el Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT) y consta de 32 parcelas con diferentes...
Palavras-chave: Labranza; Agricultura de conservación; Raíces; Agregación; Maestría; Edafología; Tillage; Conservation agriculture; Roots; Aggregation.
Ano: 2012
URL: http://hdl.handle.net/10521/1755

Influência de sistemas de plantio e armadilha adesiva na incidência de Frankliniella williamsi Hood na cultura do milho - DOI: 10.4025/actasciagron.v28i3.961
Provedor de dados: 1
Autores: Albuquerque, Fernando Alves de; UEM; Crocomo, Wilson Badiali; UNESP; Scapim, Carlos Alberto; UEM.
Esta pesquisa objetivou avaliar a influência de diferentes sistemas de plantio de milho e o efeito de armadilha adesiva na incidência de Frankliniella williamsi Hood. Os tratamentos consistiram no plantio direto do milho sobre aveia dessecada com glyphosate, aveia tombada, aveia roçada e plantas daninhas, aveia incorporada e plantio convencional. Alguns tratamentos foram associados a armadilha adesiva de coloração azul, colocada horizontalmente no centro da parcela. Verificou-se que tanto a presença de armadilha quanto os diferentes sistemas de plantio influíram significativamente na infestação das plantas de milho pelo tripes, sendo que os tratamentos “aveia dessecada” e “aveia roçada e plantas daninhas” apresentaram menor incidência do inseto, com esse...
Palavras-chave: 5.01.02.00-1    Fitossanidade Zea mays; Tripes; Manejo de pragas; Controle cultural 5.01.02.00-1    Fitossanidade.
Ano: 2006
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/961

Influencing Factors on Farming System Development in Shandong Province
Provedor de dados: 31
Autores: Liu,   Yan; Ning,   Tangyuan; Zhou,   Xunbo.
The developmental situation of the farming system in Shandong Province is introduced. At present, Shandong Province is at the semi-intensive, semi-commercial and semi-sufficiency level of farming system. Eastern coast and central Shandong agricultural zones are moving in the direction of modern farming system, having formed a preliminary new pattern of the coordinated development of grain, feedstuff, economic and other crops. Influencing factors on the development of farming system in Shandong Province is analyzed, which are agricultural production condition and input level, population and food, policy measures, development of natural resources and regions, agricultural industrialization and urbanization level, and scientific and technological level. Total...
Tipo: Journal Article
Palavras-chave: Shandong Province; Structure adjustment; Regional development; Farming system; China; Agribusiness.
Ano: 2010
URL: http://purl.umn.edu/101903

Ingestive behavior of lambs or hoggets fed on high-concentrate diets of maize or sorghum
Provedor de dados: 124
Autores: Venturini,Rafael Sanches; Carvalho,Sérgio; Teixeira,Camilla Trevisan; Pellegrini,Luiz Gustavo de; Brutti,Danielle Dias.
ABSTRACT The aim of this study was to evaluate the ingestive behaviour of lambs or hoggets, finished in confinement on high-concentrate diets based on maize or sorghum grain. A total of 32 animals were used, 16 lambs (milk teeth) and 16 hoggets (2 teeth), which were distributed in a completely randomised experimental design and a 2 x 2 factorial scheme (two categories x two types of grain). In the categories under evaluation (lambs and hoggets), a significant difference (P≤0.05) was found for total chewing time, idle time and other activities (expressed in min/day and as a percentage), number of meals per day, time spent per meal and for the weight of dry matter or NDF ingested per meal (g/DM per REF and g/NDF per REF respectively). For the grain under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal category; Confinement; Sheep.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000400716

Innovación tecnológica en la producción de jitomate (Lycopersicon esculentum) en invernadero por productores de milpa tradicional en Santo Domingo Teojomulco y San Jacinto Tlacotepec, Oaxaca.
Provedor de dados: 32
Autores: Ortíz Jiménez, Bersaín.
La tesis comprende el estudio de unidades familiares que producen jitomate en invernadero y realizan actividades productivas de autoconsumo como lo es la milpa. Se realiza el análisis del grado de adopción de innovación tecnológica en la producción de jitomate en invernadero y los flujos de conocimiento sobre tecnología entre los productores; también se analiza la productividad y sustentabilidad de los sistemas agrícolas de la unidad familiar. El índice de adopción (InAI), se obtiene a través del análisis de variables latente de los componentes tecnológicos, comparando el antes y después del proceso del método de las escuelas de campo para la difusión de tecnología; con el método de redes sociales se observa el flujo de conocimiento y relaciones de cada...
Palavras-chave: Adopción de innovación tecnológica; Redes sociales; Sistemas agrícolas; Productividad; Sustentabilidad; Estudios del Desarrollo Rural; Doctorado; Adoption of technological innovation; Social networks; Agricultural systems; Productivity; Sustainability.
Ano: 2012
URL: http://hdl.handle.net/10521/1787

Innovative crop and weed management strategies in organic spinach: machine performances and cultivation costs
Provedor de dados: 21
Autores: FONTANELLI, DR. M.; FRASCONI, DR. C.; LULLI, DR. L.; ANTICHI, DR. D.; BIGONGIALI, DR. F.; CARLESI, DR. S.; BARBERI, PROF. P.; PERUZZI, PROF. A.
Weed competition is one of the most serious problems in vegetable crops. Physical and cultural methods represent the only adoptable solutions in organic farming systems. A two-year (2006-08) on-farm research is being carried out to test innovative operative machines for physical weed control on a typical vegetable crop sequence in the Arno Valley (Pisa, Italy). In this work we present the first results, obtained on organic fresh market spinach (Spinacia oleracea). The new strategy is compared with the standard crop and weed management system, characterised by the use of biodegradable maize starch mulch, and with a system in which the use of improved physical methods is coupled with the use of a subterranean clover (Trifolium subterraneum) living mulch....
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management; Technology assessment.
Ano: 2008
URL: http://orgprints.org/12315/1/Fontanelli_12315_ed.doc

Inoculacao de bacterias endofiticas em milho para o controle de doencas fungicas.
Provedor de dados: 14
Autores: BRESSAN, W.
bitstream/item/30150/1/Ct.31.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Bacteria endofilica; Maize; Inoculation.; Controle Biológico; Doença Fúngica; Inoculação; Milho; Zea Mays.; Biological control.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/485489

INOCULATION AND ISOLATION OF PLANT GROWTH-PROMOTING BACTERIA IN MAIZE GROWN IN VITÓRIA DA CONQUISTA, BAHIA, BRAZIL
Provedor de dados: 90
Autores: Santos,Joelma da Silva; Viana,Tarciana de Oliveira; Jesus,Cristina Meira de; Baldani,Vera Lúcia Divan; Ferreira,Joilson Silva.
Maize is among the most important crops in the world. This plant species can be colonized by diazotrophic bacteria able to convert atmospheric N into ammonium under natural conditions. This study aimed to investigate the effect of inoculation of the diazotrophic bacterium Herbaspirillum seropedicae (ZAE94) and isolate new strains of plant growth-promoting bacteria in maize grown in Vitória da Conquista, Bahia, Brazil. The study was conducted in a greenhouse at the Experimental Area of the Universidade Estadual do Sudoeste da Bahia. Inoculation was performed with peat substrate, with and without inoculation containing strain ZAE94 of H. seropedicae and four rates of N, in the form of ammonium sulfate (0, 60, 100, and 140 kg ha-1 N). After 45 days, plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbaspirillum spp.; Zea mays.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100078

Inoculation of maize with Azospirillum brasilense in the seed furrow
Provedor de dados: 124
Autores: Morais,Tâmara Prado de; Brito,Césio Humberto de; Brandão,Afonso Maria; Rezende,Wender Santos.
ABSTRACT Several studies addressing the inoculation of cereals with diazotrophic microorganisms can be found in the literature. However, in many experiments, investigators have overlooked the feasibility of applying these microorganisms to the furrow together with the seed, and the effect of bacterial concentration on phytostimulation. The aim of this work was to evaluate the effect of doses of an inoculant based on Azospirillum brasilense, applied to the seed furrow when planting maize, combined with different doses of nitrogen fertiliser. The experiment was carried out in the field, in soil of the cerrado region of Brazil. An experimental design of randomised blocks in bands was adopted, comprising nitrogen (40, 100, 200 and 300 kg ha-1) and doses of an...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diazotrophic bacteria; Nitrogen doses; Bacterial concentration; Zea mays L.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902016000200290

Input verification trial : I Black soil
Provedor de dados: 106
Autores: Prakob Jan-aram.
1 table
Palavras-chave: Corn; Maize; On farm research; Verification trial; Black soil; ข้าวโพด; การทดสอบผลผลิต; ดินดำ; พันธุ์; ปุ๋ย; การกำจัดวัชพืช; ผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4335

Input verification trial : II Red soil
Provedor de dados: 106
Autores: Prakob Jan-aram.
1 table
Palavras-chave: Corn; Maize; On farm research; Verification trial; Red soil; Varieties; Fertilizers; Weed control; Yields; ข้าวโพด; การทดสอบผลผลิต; พันธุ์; ปุ๋ย; การกำจัดวัชพืช; ดินแดง; ผลผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4336

Insect pests of corn and their control in the Philippines
Provedor de dados: 106
Autores: Calora, Feliciano B.; Ferino, Mateo P.
4 tables
Palavras-chave: Corn; Maize; Insect pests; Orthoptera; Homoptera; Coleoptera; Lepidoptera; Thysanoptera; Hemiptera; Diptera; Philippines; ข้าวโพด; แมลงศัตรูพืช; ฟิลิปปินส์.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3739

Insect pests of stored corn
Provedor de dados: 106
Autores: Chuwit Sukprakarn.
Palavras-chave: Corn; Maize; Insect pests; Storage; Weevils; Sitophilus; Tribolium; Tribolium; Sitotroga; Ephestia; Corcyra; Insect control; Insecticides; ข้าวโพด; แมลงศัตรูพืช; การเก็บรักษา; มอดข้าวสาร; การควบคุมแมลงศัตรูพืช.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4145

Insecticidal activity of culture supernatants from Bacillus thuringiensis Berliner strains against Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) larvae
Provedor de dados: 44
Autores: Barreto,Marliton R.; Loguercio,Leandro L.; Valicente,Fernando H.; Paiva,Edilson.
Novel vegetative insecticidal proteins (Vips) identified in the supernatant of Bacillus thuringiensis (B.t.) cultures have shown to provide adequate control over a wide spectrum of economically important crop pests. To evaluate the potential applicability of these proteins against fall armyworm (Spodoptera frugiperda Smith) larvae, the most important insect pest for tropical maize, the characteristics and mortality effects of culture supernatants from five B.t. strains were investigated. Striking differences among strains were detected, not only in terms of efficiency in killing the insect, but also regarding to mortality effects of heated and non-heated supernatants, which were used to distinguish the heat-sensitive protein-derived insecticidal fraction...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Biological control; Fall armyworm; Vegetative insecticidal proteins; Vip genes.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591999000400010

Insecticidal Activity of Peumus boldus Molina Essential Oil against Sitophilus zeamais Motschulsky
Provedor de dados: 117
Autores: Betancur R,Jessica; Silva A,Gonzalo; Rodríguez M,J. Concepción; Fischer G,Susana; Zapata S.M,Nelson.
In stored grains, the main agents diminishing production are insects, which can produce losses between 20% and 80% before harvest or under storage. The insecticidal properties of the essential oil of fresh leaves of Peumus boldus Molina against maize weevil (Sitophilus zeamais Motschulsky) adults were determined under laboratory conditions. The highest mortality (100%) was achieved at 4% concentration by contact with a treated glass surface. The same concentration in impregnated corn (Zea mays L.) grain, resulted in 98.7% mortality. Mortality by fumigant action at 6 h was 100% with 35 µL oil in 0.15 L (air volume). Concentrations 1, 2 and 4% of essential oil produced 0% F1 adult emergence. At 10 d of residual effect, the 4% concentration reached 63.7%...
Tipo: Journal article
Palavras-chave: Maize weevil; Boldus; Stored grains; Botanical insecticides.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000300007

Insecticidal Properties of Peumus boldus Molina Powder Used Alone and Mixed with Lime Against Sitophilus zeamais Motschulsky (Coleopter: Curculionidae)
Provedor de dados: 117
Autores: Bustos-Figueroa,Gabriel; Osses-Ruiz,Francisco; Silva-Aguayo,Gonzalo; Tapia-Vargas,Maritza; Hepp-Gallo,Ruperto; Rodríguez-Maciel,J. Concepción.
The insecticidal properties of boldus (Peumus boldus Molina) powder used alone and mixed with lime against adults of maize weevil (Sitophilus zeamais Motschulsky) were evaluated under laboratory conditions. Additionally, aeration effects (presence or absence) and temperature (room temperature vs. 3 ºC) on insecticidal properties were studied over time. A mortality rate of 100% was observed at 20 g kg-1 (w/w) of P. boldus powder when used alone and mixed with lime in proportions of 50:50, 60:40, and 80:20. The 50% lethal concentration (LC50) for all treatments was &lt; 5 g kg-1, while LC90 was 11 g kg-1. Mixing corn grains with different insecticidal treatments did not affect maize germination. Temperature and aeration did not influence mortality of maize...
Tipo: Journal article
Palavras-chave: Boldus; Maize weevil; Stored corn.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000300007

Insecticide activity of clove essential oil on bean weevil and maize weevil
Provedor de dados: 91
Autores: Jairoce,Carlos F.; Teixeira,Cristiano M.; Nunes,Camila F. P.; Nunes,Adrise M.; Pereira,Claudio M. P.; Garcia,Flávio R. M.
ABSTRACT Bean weevil and maize weevil can cause considerable damage to stored grains. These insects are mainly controlled with synthetic chemical insecticides, which may bring serious problems to human and environmental health. Therefore, this study aimed to evaluate the efficiency of the essential oil of clove [Syzygium aromaticum (L.) Merrill &amp; Perry (Myrtaceae) (origin: Bahia, season Sep.2014-Feb.2015)] in the control of S. zeamais and A. obtectus under laboratory conditions. The essential oil was extracted through the classic hydrodistillation process and its chemical components were identified via gas chromatography. Oil efficiency was tested at the doses of 35, 17.9, 8.9, 3.6, 1.8, 0.4 and 0.2 μL g-1 (derived from a pilot study) for insect...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Control strategies; Insect infestations; Grain storage.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100072

Insects injuring corn in Thailand
Provedor de dados: 106
Autores: Aphirat Arunin.
Palavras-chave: Corn; Maize; Insect pests; Corn borers; Corn earworms; Patanga; Leaf aphids; Armyworms; Thailand; ข้าวโพด; แมลงศัตรูพืช; หนอนเจาะลำต้นข้าวโพด; หนอนเจาะฝัก; ตั๊กแตนปาทังก้า; เพลี้ยอ่อน; ประเทศไทย.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3740

Institutional Change and Discontinuities in Farmers' Use of Hybrid Maize Seed and Fertilizer in Malawi: Findings from the 1996-97 CIMMYT/ MoALD Survey
Provedor de dados: 31
Autores: Smale,   Melinda; Phiri,   Alexander.
This study records the use of hybrid maize seed and fertilizer by small-scale farmers in Malawi, as well as their opinions about these inputs, from 1989-90 through 1996-97. Its main purpose is to determine whether the principal constraint to smallholders’ use of maize hybrids is the acceptability of the hybrid maize germplasm or the institutional reforms and policies affecting its use. The study also provides information about a practice that has implications for the impact of seed technologies and seed industries — the recycling of nonconventional hybrids (i.e., saving seed of an F1 hybrid to plant in subsequent seasons). Findings of the most recent farmer survey in 1996-97 demonstrate that the grain quality or yield characteristics of maize hybrids no...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/7674

Institutions and the African Farmer
Provedor de dados: 31
Autores: Eicher,   Carl K.
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 1999
URL: http://purl.umn.edu/7660

Instruções práticas para o cultivo do milho nas várzeas do Amapá.
Provedor de dados: 14
Autores: CAVALCANTE, E. da S.
Preparo do solo; Semeadura; Cultivar; Tratos culturais; Pragas de importância economica; Controle de pragas; Controle de doenças; Rotação de culturas; Colheita; Secagem; Beneficiamento; Armazenamento; Comercialização; Coeficientes tecnicos.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Brasil; Amapá; Maize; Cultural methods.; Milho; Pratica Cultural; Várzea; Zea Mays.; Brazil.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/341809

Insulina e glicose como moduladores do desenvolvimento de plântulas de milho doce (Su1)
Provedor de dados: 39
Autores: Oliveira Júnior,Luiz Fernando Ganassali; Bressan-Smith,Ricardo; Oliveira,Antônia Elenir Amâncio de; Pereira,Messias Gonzaga; Silva,Luciana Belarmindo; Viana,Leandro Hespanhol; Vieira,Henrique Duarte.
Durante a germinação e o desenvolvimento pós-germinativo de milho, o fluxo metabólico é intenso, ocorrendo síntese e degradação de açúcares (glicose, frutose e sacarose) e hidrólise de amido, além da redução da concentração do ácido abscísico (ABA). Acredita-se que altas concentrações de glicose exógena, promovam acúmulo de ABA, proporcionando atraso na germinação e desenvolvimento de plântulas. Concentrações menores, por outro lado, podem ocasionar estímulo na germinação e desenvolvimento. Neste trabalho, foi observado que a glicose (800 µM) estimulou a germinação e o desenvolvimento inicial de genótipo de milho comum e retardou, severa ou brandamente, genótipos de milho doce (su1), provavelmente devido às diferentes concentrações endógenas de glicose de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Desenvolvimento de plântulas; Germinação de sementes; Glicose; Insulina; (Zea maize L.) milho doce (Su1).
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300014

Insuring Against Losses from Transgenic Contamination: The Case of Pharmaceutical Maize
Provedor de dados: 31
Autores: Ripplinger,   David G.; Hayes,   Dermot J.; Goggi,   Susana; Lamkey,   Kendall R.
Concerns about the risk of food supply contamination and the resulting financial losses have limited the development and commercialization of certain pharmaceutical plants. This article develops an insurance pricing model that helps translate these concerns into a cost-benefit analysis. The model first estimates the physical dispersal of maize pollen subject to a number of weather parameters. This distribution is then validated with the limited amount of currently available field trial data. The physical distribution is then used to calculate the premium for a fair-valued insurance policy that would fund the destruction of possibly contaminated fields. The flexible framework can be readily adapted to other crops, management practices, and regions.
Tipo: Working or Discussion Paper
Palavras-chave: Contemporaneous fertility; Costs and benefits; Insurance; Pharmaceutical maize; Pollen dispersal; Risks and benefits; Stochastic model.
Ano: 2008
URL: http://purl.umn.edu/37332

Intake and total apparent digestibility in lambs fed six maize varieties in the Brazilian Semiarid
Provedor de dados: 96
Autores: Santos,Rafael Dantas dos; Pereira,Luiz Gustavo Ribeiro; Neves,André Luis Alves; Araújo,Gherman Garcia Leal de; Aragão,Alex Santos Lustosa de; Chizzotti,Mário Luiz.
The objective of this study was to evaluate the daily intake and total apparent digestibility of dry matter, organic matter, crude protein, gross energy, ether extract, neutral detergent fiber, acid detergent fiber, total and non-fibrous carbohydrates, total digestible nutrients, energy intake and nitrogen balance of silages of six maize varieties with early or super early cycles recommended to Northeast Brazil. Twenty-four male castrated lambs were lodged in metabolic cages. A completely randomized design with six treatments and four replications was used, with means compared by Tukey test at 5%. There were no differences among varieties for any of the evaluated variables regarding intake and apparent digestibility. Concerning the intake of digestible...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feeding; Nutrition; Sheep; Ruminants; Supplementation; Zea mays.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200040

Integral Study of Atrazine Behaviour in Field Lysimeters in Argentinean Humid Pampas Soils
Provedor de dados: 117
Autores: Hang,Susana; Andriulo,Adrián; Sasal,Carolina; Nassetta,Mirtha M; Portela,Silvina; Cañas,Ana I.
Atrazine behavior during crop maize (Zea mays L.) production in soils of Argentine humid pampas was investigated. Lysimeters (3.3 x 3.3 x 1.4 m) with a Typic Argiudoll (Pergamino) and others with a Typic Hapludoll (Junín) were monitored for drainage water content and atrazine concentrations in soil and water. Soil profiles were sampled in four depths in three dates, and water drainage pooled in four periods. Most of atrazine loss in drainage occurred within 30 d of atrazine application being 0.13% and 0.03% of the total atrazine applied for Pergamino and Junín, respectively. Under laboratory conditions half-life average in both profiles was 16 d. Atrazine extractable residues (AER) in lysimeters showed differences in quantity and distribution between both...
Tipo: Journal article
Palavras-chave: Atrazine extractable residues; Preferential flow; Half-life; Contamination risk.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100011

Integrated management of two foliar diseases of sesame (Sesamum indicum L.) in maize/sesame intercrop
Provedor de dados: 21
Autores: JIMOH, MUIDEEN; ENIKUOMEHI, OLOLADE; OLOWE, VICTOR; AFOLABI, CLEMENT.
The quest for alternative method in managing diseases in crop production as against the use of prohibitive synthetic chemicals which are harmful to human health has been receiving serious attention by scientists in the last two decades. Two field trials were conducted during the early and late cropping seasons of 2010 to evaluate the effect of nine treatments (Tithonia diversifolia and Chromolaena odorata sprayed at 7.0, 7.5 and 8.0%, sesame sprayed with distilled water, sesame intercropped with maize and sole sesame) on the control of Cercospora leaf spot (CLS) and Alternaria leaf blight (ALB) diseases and agronomic performance of sesame in the transition zone. The experiment was laid out in a randomized complete block design and replicated three times....
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop health; Quality; Protection.
Ano: 2015
URL: http://orgprints.org/28456/1/jimoh1_3AOC.doc

Integrated pest management for corn and sorghum in Thailand
Provedor de dados: 106
Autores: Young, W.R.
1 table
Palavras-chave: Corn; Maize; Sorghum; Pest insects; Integrated pest management; Shoot fly; Atherigona soccata; Thrips; Frankliniella williamsi; Leaf eating grasshopper; Patanga succincta; Corn leaf aphids; Rhopalosiphum maidis; Corn borers; Ostrinia furnacalis; Trichogramma australicum; Corn earworms; Heliothis armigera; Weevils; Sitophilus zeamais; ข้าวโพด; ข้าวฟ่าง; การจัดการแมลงศัตรู; หนอนแมลงวันเจาะยอดข้าวฟ่าง; เพลี้ยไฟ; หนอนเจาะฝัก; ตั๊กแตนปาทังก้า; เพลี้ยอ่อน; หนอนเจาะลำต้น; มอดข้าวสาร.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3965

Integrated research program on soil and fertilizer requirement for increasing yield of corn and sorghum
Provedor de dados: 106
Autores: Amnat Suwanarit; Aschan Sukthumrong; Tawatchai Na Nagara; Jongruk Chanchareonsook; Pusit Wiwutwongwana; Siriya Dithipen; Lawal Powpaichit; Pachanee Malai; Sorasith Vacharotayan.
23 tables
Palavras-chave: Corn; Maize; Sorghum; Varieties; Nitrogen fertilizers; Phosphate fertilizers; Mixed fertilizers; Rock phosphate; Hyperphosphate; Intercropping; Yields; ข้าวโพด; ข้าวฟ่าง; การใส่ปุ๋ย; ความอุดมสมบูรณ์ของดิน; การเพาะปลูก; การจัดการดิน.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3866

Integrated research program on soil and fertilizer requirement for increasing yields of corn and sorghum
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Jongruk Chanchareonsook; Pusit Wiwutwongwana; Aniruth Potichan; Sorasith Vacharotayan; Viroch Impithuksa; Tawatchai Na Nagara; Suthep Thongpae; Pachanee Malai.
36 tables
Palavras-chave: Corn; Maize; Sorghum; Varieties; Nitrogen fertilizers; Phosphate fertilizers; Yields; ข้าวโพด; ข้าวฟ่าง; ความอุดมสมบูรณ์ของดิน; การใส่ปุ๋ย; โครงการบูรณาการ; การให้ผลผลิตของพืช.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3837

Integrated research program on soil and fertilizer requirement for increasing yields of corn and sorghum
Provedor de dados: 106
Autores: Amnat Suwanarit; Aschan Sukthumrong; Paiboon Rattanaprateep; Jongruk Chanchareonsook; Sakkasem Soonthornphat; Nuntarat Supakamnerd; Siriya Dithipen; Pongmanee Thongbai; Sukum Chotechuangmanirat; Aniruth Potichan; Sorasith Vacharotayan.
7 ill., 24 tables
Palavras-chave: Corn; Maize; Sorghum; Varieties; Nitrogen fertilizers; Phosphate fertilizers; Rock phosphate; Ammonium; Nitrate fertilizers; Yields; Intercropping; Cropping systems; Korat soil; Alkali soil; Nutrient uptake; ข้าวโพด; ข้าวฟ่าง; การใส่ปุ๋ย; ความอุดมสมบูรณ์ของดิน; การเพาะปลูก; การจัดการดิน.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3980

Integrated research program on soil and fertilizer, requirement for increasing yields of corn and sorghum
Provedor de dados: 106
Autores: Amnat Suwanarit; Aschan Sukthumrong; Jongruk Chanchareonsook; Kanchana Laosrichareonsakul; Sakkasem Soonthornphat; Nuntarat Supakamnerd; Lawal Powpaichit; Sorasith Vacharotayan.
2 ill., 23 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizers; Nitrogen fertilizers; Phosphate fertilizers; Rock phosphate; Mixed fertilizers; Intercropping; Cropping systems; Soil types; Nutrient uptake; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบปุ๋ย; ความอุดมสมบูรณ์ของดิน; การเพาะปลูก; การจัดการดิน.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3927

Integrated research program on soil and fertilizer requirement for increasing yields of corn and sorghum
Provedor de dados: 106
Autores: Amnat Suwanarit; Aschan Sukthumrong; Jongruk Chanchareonsook; Chairerk Suwannarat; Sukum Chotechuangmanirat.
10 ill., 2 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizers; Ammonium fertilizers; Rock phosphate; Nitrogen fertilizers; Spacing; Plant population; Nutrient uptake; Yields; ข้าวโพด; ข้าวฟ่าง; การใส่ปุ๋ย; ความอุดมสมบูรณ์ของดิน; การเพาะปลูก; การจัดการดิน.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4021

Integrated research program on soil and fertilizer requirement for increasing yields of corn and sorghum
Provedor de dados: 106
12 ill., 17 tables
Palavras-chave: Corn; Maize; Sorghum; Legumes; Fertilizers; Nitrogen fertilizers; Phosphate fertilizers; Rock phosphate; Varieties; Intercropping; Yields; Nitrogen uptake; Soil surveys; ข้าวโพด; ข้าวฟ่าง; ปุ๋ย; ความอุดมสมบูรณ์ของดิน; การเพาะปลูก; การจัดการดิน.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3798

Integrated Role of Row Spacing and Adjuvant to Reduce Herbicide Dose in Maize Under Semi-Arid Conditions
Provedor de dados: 87
Autores: NADEEM,M.A.; ABBAS,T.; BASHIR,F.; MAQBOOL,R.
ABSTRACT: Crop row spacing adjustment and adjuvants have a significant role in decreasing herbicide cost and environmental damage by reducing herbicide application rate. A field study was conducted to assess the impact of two row spacing values and reduced herbicide rates along with adjuvant on weeds in maize in 2014 and 2015. The experiment consisted of atrazine plus mesotrione plus halosulfuran methyl (pre-mixed herbicide) at label rate (719.2 g a.i. ha-1); reduced rates of 75% (539.4 g a.i. ha-1) and 50% (359.6 g a.i. ha-1) alone and in combination with alkyl ether sulphate at 396.8 mL ha-1 as an adjuvant along with weedy check in maize sown at 60 and 75 cm row spacing. Alkyl ether sulphate increased weed control efficacy (13-35%) of the pre-mixed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alkyl ether sulphate; Economic analysis; Integrated weed management; Narrow row maize; Reduced herbicide dose; Weed control efficiency.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100237

Integrating maize and triticale in grass/clover based dairy systems:  examining yields and autumn soil nitrate levels
Provedor de dados: 21
Autores: Pinxterhuis, Ina; Boer, H. de; Eekeren, N. van; Stienezen, M.W.J.
To establish N-efficient crop rotations with perennial ryegrass/white clover, maize and triticale, a 9-year field experiment was executed on an organic experimental farm in the Netherlands. Crop rotations with different levels of slurry (dairy effluent from the free-stall barn, average dry matter content of 7%) application were tested for dry matter (DM) yield, N yield, soil mineral N in autumn, soil organic matter and soil organic N. Maize cropping and slurry application both increased annual DM yield. However, the second year of grass/ clover following maize, maize itself and slurry applications each resulted in higher soil mineral N in autumn, increasing the risk of nitrate leaching losses. A rotation of 4 years of grass/clover, 2 years of maize and 1...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover; Soil.
Ano: 2013
URL: http://orgprints.org/26765/1/2816.pdf

Integrating pigeonpea in maize based farming systems may increase food production and alleviate poverty
Provedor de dados: 21
Autores: Høgh-Jensen, Henning; Odgaard, R.; Myaka, F.A.; Sakala, W.D.; Adu-Gyamfi, J.J.; Vesterager, J.M.
Pressure on natural resources implies that millions of farmers in semi-arid eastern and southern Africa face very low and declining crop yields. Major natural constraints are the nitrogen and phosphorus supply together with insufficient and highly variable rainfall. This article addresses the possibilities for improved soil fertility, increased productivity and income opportunities among smallholders in semi-arid eastern and southern Africa through the integration of improved pigeonpea in maize-based cropping systems. Specifically farmers’ experiences with cultivation and integration of pigeonpea in maize-based cropping systems are discussed. This includes how the integration of pigeonpea affects the livelihood situation of rural smallholders – male as...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Farm nutrient management; Social aspects; Farm economics.
Ano: 2008
URL: http://orgprints.org/11420/1/Hogh%2DJensen_11420_ed.rtf

Integration and Equilibrium in the Maize Markets in Southern Africa
Provedor de dados: 31
Autores: Mutambatsere,   Emelly; Mabaya,   Edward T.; Christy,   Ralph D.
For most countries in southern Africa, food security has been addressed through self-sufficiency, traditionally attained through widespread government involvement in the input and output markets for major food commodities.  Food policies through the 1980’s have been characterized by input subsidies for farmers; fixed, pan-seasonal and pan-territorial farm level pricing systems, mainly implemented through parastatal marketing boards; as well as subsidies and price controls at the wholesale and retail levels.  Under Structural Adjustment Programs of the 1990’s, most of those policies were abandoned for more market oriented policies.  During the same period, many countries in the region joined the multilateral trading system, and on a regional level, two...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries; Marketing.
Ano: 2007
URL: http://purl.umn.edu/9780

INTEGRATION IN BENIN MAIZE MARKET: AN APPLICATION OF THRESHOLD COINTEGRATION ANALYSIS
Provedor de dados: 31
Autores: McKenzie,   Andrew M.; Pede,   Valerien O.
The degree to which markets are spatially efficient has important implications for market liberalization and other policy reforms. After several attempts to control and regulate the marketing of maize in Benin, a liberalized free-market system was finally adopted in 1990. It was assumed that a free-market system would perform more efficiently and enhance maize market integration compared with the more government oriented systems of the past. However, trade barriers still exist in the form of traders' associations across market locations. Recent market integration literature has focused on the influence of transaction costs and threshold effects on tests for integration. Hansen and Seo's two regime threshold cointegration model is used to analyze the degree...
Tipo: Conference Paper or Presentation
Palavras-chave: Marketing.
Ano: 2005
URL: http://purl.umn.edu/19293

Intellectual Property Rights and Their Impacts in Developing Countries: An Empirical Analysis of Maize Breeding in Mexico
Provedor de dados: 31
Autores: Leger,   Andreanne.
There is little empirical evidence concerning the effects of intellectual property rights (IPR) on a technologically advanced developing country. Complete enumeration of the Mexican maize breeding industry showed that, contrary to the hypothesis that IPR would provide, in a technologically advanced developing country, incentives for R&amp;D and innovation, IPR play no role for the industry in general, but that they are important for certain breeders' categories. The paper presents the theory on IPR and a short background on the Mexican maize breeding industry. The analysis of the interviews with maize breeders leads to the conclusion that the theory on IPR should be revised and take into account the characteristics of developing countries critical for the...
Tipo: Working or Discussion Paper
Palavras-chave: Intellectual property rights; Developing Country; Empirical Evidence; Transaction costs; Mexico; Maize; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; O34; Q16; O31; Q17.
Ano: 2005
URL: http://purl.umn.edu/18835

Intensity of angular leaf spot and anthracnose on pods of common beans cultivated in three cropping systems
Provedor de dados: 64
Autores: Vieira,Rogério Faria; Paula Júnior,Trazilbo José de; Teixeira,Hudson; Vieira,Clibas.
With the purpose to evaluate the intensity of angular leaf spot (ALS) and anthracnose (ANT) on pods, nine genotypes of common bean were planted in three cropping systems: monocrop (MC), monocrop grown on trellises (MCT), and intercrop with maize (ICM). In MC, beans were planted 0.5 m apart. Trelisses were set up with 1.8 m high bamboos and beans were sown 0.65 m apart. In ICM, beans were planted simultaneously with maize and in its rows. This cereal was sown 1.0 m apart with four plants per meter. Each cropping system was an independent trial installed close to each other. Climbing genotypes of beans most susceptible to ALS had less diseased pods in ICM than in both MC and MCT, but the less susceptible genotypes, regardless of their growth type, as well as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaeoisariopsis griseola; Colletotrichum lindemuthianum; Phaseolus vulgaris; Seed transmission.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000700040

Intensive cropping of maize in the Southeastern United States
Provedor de dados: 18
Autores: Busscher, W.J.; Sojka, R.E.
Tipo: Article
Palavras-chave: Corn / maize; Mass Import - autoclassified (may be erroneous).
Ano: 1994
URL: http://eprints.nwisrl.ars.usda.gov/631/1/853.pdf

Interações planta-micróbio entre o milho (Zea mays L.) e microrganismos endofíticos observados por microscopia eletrônica de varredura - DOI: 10.4025/actascibiolsci.v26i3.1600
Provedor de dados: 3
Autores: Souza, Alexandre Oliveira de; USP; Pamphile, João Alencar; UEM; Rocha, Carmem Lúcia M. Sartori Cardoso da; UEM; Azevedo, João Lúcio; USP.
Durante os últimos anos, a ocorrência de endófitos tem sido constantemente reportada em folhas saudáveis, assintomáticas, sugerindo que esses microrganismos podem colonizar órgãos de plantas sem causarem sintomas aparentes de doenças. O objetivo deste trabalho foi o de observar as interações planta-micróbio entre o milho (Zea mays L.) e bactérias endofíticas no tecido das folhas por microscopia eletrônica de varredura com a aplicação de uma técnica de fixação com ósmio.  Com o emprego dessa técnica foi possível observar o espaço intercelular das folhas de milho com bactérias endofíticas. A configuração tri-dimensional e o arranjo das colônias endofíticas nos tecidos das folhas da planta hospedeira foram visíveis
Palavras-chave: 2.01.00.00-0    Biologia Geral endofíticos; Bactérias; Milho; Microscopia eletrônica de varredura 2.01.00.00-0    Biologia Geral.
Ano: 2004
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1600

Interactions between diazotrophic bacteria and mycorrhizal fungus in maize genotypes
Provedor de dados: 63
Autores: Miyauchi,Marina Yumi Horta; Lima,Dáfila Santos; Nogueira,Marco Antonio; Lovato,Gisele Milani; Murate,Letícia Sayuri; Cruz,Márcio Ferreira; Ferreira,Josué Maldonado; Zangaro,Waldemar; Andrade,Galdino.
Some diazotrophic bacteria can fix nitrogen biologically in gramineous host plants. Generally, gramineous plants are also associated with mycorrhizal fungi, that can improve mainly plant P uptake. Among the factors affecting plant-microbe interactions, the plant genotype plays an important role. This study evaluates the effect of diazotrophic bacteria and an arbuscular mycorrhizal fungus (AMF), on five genotypes of maize (Zea mays L.), in relation to plant biomass, shoot N and P concentrations, and fine root morphological traits. The experimental design was entirely randomized in a factorial 5 × 4 × 2 arrangement, i.e., five maize genotypes (hybrids C333B, AS3466, and PREMIUM, and the inbreed lines lg40897-1 and lg40505-1), three diazotrophic bacteria...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Azospirillum; Biological nitrogen fixation; Mycorrhiza; Root morphology.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000500012

Interactions Between Food Market Reform and Regional Trade in Zimbabwe and South Africa: Implications for Food Security
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Takavarasha,   T.; van Zyl,   Johan.
A major role of agricultural policy is to identify policy changes that may induce technological innovation and productivity growth throughout the food system, in order to increase the living standards of people who must relate to it in one way or another. While food market reform has been subject to contentious and often emotional debate over the last decade in Africa, the debate has generally been over assumptions about how food markets work in reality as opposed to theory, and how markets actually respond to particular forms of policy change. The lack of consensus is partially due to a shortage of empirical, ground-level information linking specific policies to specific impacts. It is in this context that we draw on applied analysis in Southern Africa to...
Tipo: Report
Palavras-chave: Food security; Food policy; Food market reform; Regional trade; International Relations/Trade; Marketing; Downloads May 2008-July 2009: 35; Q18.
Ano: 1994
URL: http://purl.umn.edu/54703

Interactive effects of excess boron and salinity on histological and ultrastructural leaves of Zea mays amylacea from the Lluta Valley (Arica-Chile)
Provedor de dados: 118
Autores: Bastías,Elizabeth; González-Moro,María B; González-Murua,Carmen.
E.I. Bastías, M.B. González-Moro, and C. González-Murua. 2013. Interactive effects of excess boron and salinity on histological and ultrastructural leaves of Zea mays amylacea from the Lluta Valley (Arica-Chile). Cien. Inv. Agr. 40(3): 581-595. Maize is widely cultivated throughout the world, and more maize is produced each year than any other grain. Studies on the response of maize to salinity have typically focused on physiological aspects, but few studies have addressed the effects of salinity on the anatomical and ultrastructural characteristics of different plant organs. We analyzed the cell structure and changes in tissue organization in young leaves of Zea mays L. amylacea as a consequence of high salt and boron (B) levels. Plants were treated in...
Tipo: Journal article
Palavras-chave: Amylacea; Amylacea maize; Anatomical plant; Boron; Histological; Salinity.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300011

Intercepted solar radiation by maize crops subjected to different tillage systems and water availability levels
Provedor de dados: 86
Autores: Bergamaschi,Homero; Dalmago,Genei Antonio; Bergonci,João Ito; Krüger,Cleusa Adriane Menegassi Bianchi; Heckler,Bruna Maria Machado; Comiran,Flavia.
The objective of this work was to evaluate changes in the photosynthetic photon flux density (PPFD) interception efficiency and PPFD extinction coefficient for maize crop subjected to different soil tillage systems and water availability levels. Crops were subjected to no-tillage and conventional tillage systems combined with full irrigation and non-irrigation treatments. Continuous measurements of transmitted PPFD on the soil surface and incoming PPFD over the canopy were taken throughout the crop cycle. Leaf area index and soil water potential were also measured during the whole period. Considering a mean value over the maize cycle, intercepted PPFD was higher in the conventional tillage than in the no-tillage system. During the initial stages of plants,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Leaf area; No-tillage; Photosynthetic photon flux density; Water deficit.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001200001

Interception of Wheat mosaic virus (WMoV) in Brazil in maize seeds from the United States
Provedor de dados: 86
Autores: Botelho,Stephanie Regina Alves; Duarte,Macária Ferreira; Barbosa,Andreza Viveiros; Lau,Douglas; Sanches,Márcio Martinello; Fernandes,Fernanda Rausch.
Abstract: The objective of this work was to evaluate the phytosanitary aspect of two accessions of maize (Zea mays) seeds from the United States introduced to Brazil, regarding the presence of Wheat mosaic virus (WMoV). Two to three weeks after sowing, symptomatic leaves were tested by Elisa using specific antiserum to WMoV. The reaction was positive, and leaf samples were analyzed by real-time PCR and amplified PCR products were sequenced. The WMoV isolates had 99 to 100% nucleotide identity with isolates from Australia and the United States. Until now, there is no report of the presence of this virus in Brazil. According to the federal law on plant protection, the plants were burned to avoid the introduction of this exotic pest in the country. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Exotic pest; High plains virus; Plant quarantine; Phytosanitary analysis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000500688

Intercropping boosts food production: maize-beans and maize-cowpea intercropping in the Noreste.
Provedor de dados: 14
Autores: MORGADO, L. B.
bitstream/item/175962/1/Separata-9531.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Consorciacao; Nordeste; Cowpea; Northeast.; Feijão de Corda; Milho; Vigna Unguiculata; Zea Mays.; Beans; Corn; Intercropping.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132659

INTERCROPPING CORN WITH A COMBINATION OF TREE SPECIES TO CONTROL WEEDS
Provedor de dados: 87
Autores: SILVA,P.S.L.; SILVA,E.M.; SILVA,P.I.B.; FERNANDES,J.P.P.; CHICAS,L.S.
ABSTRACT  The combination of crop residues or crop extracts is often more advantageous in controlling weeds, than the application of each residue or extract singly. This suggests that in intercropping with maize, the combination of tree species can be more advantageous than species isolated in weed control. The objective of this study was to evaluate the effects of intercropping with a combination of leguminous on the weed growth and corn yield. A randomized-block design with split plots (cultivars in plots) and five replicates was established. The cultivars BR 205 and AG 1041 were subject to the following treatments: two weedings (A), intercropping with sabiá (B), gliricidia (C), gliricidia + sabiá (D) and no weeding (E). In the B and C, 30 viable seeds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Gliricidia sepium; Mimosa caesalpiniifolia; Green corn; Grain yield.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000400717

Intercropping maize and cowpea cultivars: I. Green-grain yield
Provedor de dados: 124
Autores: Silva,Marcos Antônio Leite da; Silva,Paulo Sérgio Lima e; Oliveira,Vianney Reinaldo de; Sousa,Roberto Pequeno de; Silva,Paulo Igor Barbosa e.
ABSTRACT Green ears of maize are much appreciated all over Brazil and reach higher prices than dry grain. This also occurs with green cowpea grain, which is much appreciated in the north and northeast of the country. The aim of this study was to identify maize and cowpea cultivars that can be grown as monocrops or intercrops to produce green grain in the state of Pará (PA). An experiment was carried out in a randomized block design with six replications in Marabá, PA. Monocrops of traditional varieties of the cowpea (‘Corujinha’ and ‘Sempre Verde’) and the maize cultivars (‘AG 1051’ and ‘AL Bandeirante’), and four alternating, intercropped rows of a combination of the varieties and cultivars were evaluated. The ‘AG 1051’ cultivar was more productive than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Vigna unguiculata; Green maize; Green beans; Land equivalent ratio.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000100414

Intercropping maize and cowpea cultivars: II. Dry grain yield
Provedor de dados: 124
Autores: Silva,Marcos Antônio Leite da; Lima e Silva,Paulo Sérgio; Oliveira,Vianney Reinaldo de; Sousa,Roberto Pequeno de; Silva,Jaeveson da.
ABSTRACT There is interest in identifying the best maize and cowpea cultivars to be used in monocropped and intercropping systems for the production of dry grain. In order to meet this interest, two monocrops of cowpea (the traditional varieties, Corujinha and Sempre Verde) were evaluated with two monocrops of maize (the AG 1051 double hybrid and the AL Bandeirante variety) and four intercrops (combinations of the cowpea varieties and the maize cultivars). Under the intercropping systems, the maize and cowpea occupied alternating rows. A completely randomized block design with six replications was used. Grain growth and yield were higher in the AG 1051 hybrid than in the AL Bandeirante variety in both the monocropped and intercropping systems. For...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Vigna unguiculata; Monocrops; Land Equivalent Ratio.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400406

Interference and Level of Economic Damage of Alexandergrass on Corn
Provedor de dados: 87
Autores: FRANDOLOSO,F.S.; GALON,L.; CONCENÇO,G.; ROSSETTO,E.R.O.; BIANCHESSI,F.; SANTIN,C.O.; FORTE,C.T.
ABSTRACT: The objective of this work was to evaluate the interference and to determine the level of economic damage (NDE) of the weed when infesting the corn crop. Treatments were composed by corn densities (2.60, 3.10, 3.65, 4.00 and 4.80 plants m-1) and 10 Alexandergrass populations for each crop seeding density. The population of plants, leaf area, soil cover and shoot dry mass of Alexandergrass were evaluated as indicator of infestation. Shoot dry mass of Alexandergrass presents better adjustment to the model of rectangular hyperbole, and losses of grain yield due to interference of the weed were satisfactorily estimated by this model. Corn sowing densities of 2.60; 3.10 and 3.65 plants m-1 in average, were more competitive of all evaluated variables...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urochloa plantaginea; Zea mays; Competitive ability.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100246

Interference from the vertical variation of soil phosphorus and from water stress on growth in maize, the soybean and sunflower
Provedor de dados: 124
Autores: Ros,Clovis Orlando Da; Matsuoka,Marcia; Silva,Rodrigo Ferreira da; Silva,Vanderlei Rodrigues da.
ABSTRACT The distribution of phosphorus (P) in the soil interferes with the availability of the nutrient and can affect plant growth. The aim of this study was to compare the growth and accumulation of P in maize, soybean and sunflower plants in vertical gradients of the nutrient in the soil, with and without water stress. The design was completely randomised with five replications, in a 3 x 2 factorial scheme: three soil depth gradients of P (decreasing, increasing and nil) and two conditions of soil water availability (with and with no water stress). The depth gradients of P were in decreasing doses of P2O5 (300, 200, 100 and 0 mg dm-3), increasing doses (0, 100, 200 and 300 mg dm-3) and equal doses (150 mg dm-3) applied to the intermediate layers...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil water; Roots; Dry weight; Nutrient accumulation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300419

Interference of GR® Volunteer Corn Population and Origin on Soybean Grain Yield Losses
Provedor de dados: 87
Autores: PIASECKI,C.; RIZZARDI,M.A.; SCHWADE,D.P.; TRES,M.; SARTORI,J.
ABSTRACT: The cultivation of GR® maize prior to soybean, mainly in the no-tillage system favors the higher occurrence of GR® volunteer corn interfering in soybean crops. Volunteer corn originate from seeds that were lost during harvest or from non-harvested seeds from the field; these are individual seeds, originating individual plants, or several seeds adhered to segments of the rachis, which originate clumps. Volunteer corn in the form of clumps predominates in soybean crops, but little information about its effect on soybean is available in the literature. During two years, three experiments were carried out with the objective of evaluate the impact of the interference of GR® F2 generation volunteer corn populations coming from individual and clump...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Zea mays; Competition; Individual plants; Clumps; Harvest losses.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100206

Interference Periods of Weeds in Maize in No-Tillage and Conventional Systems at High Altitudes
Provedor de dados: 87
Autores: HELVIG,E.O.; PINHEIRO,K.K.G.; DRANCA,A.C.; SILVA,A.A.P.; MENDES,M.C.; MACIEL,C.D.G.
ABSTRACT: The objective of this study was to determine the coexistence periods of weeds (CTWR = critical timing of weed removal) and control (CWFP = critical weed-free period) in maize crops in no-tillage and conventional systems at high altitudes in southern Brazil. To this end, four experiments were conducted in Guarapuava-Paraná during the 2016/2017 crop season using P2530™ (conventional) and P3271H™ (transgenic genetically modified for glyphosate tolerance) hybrids in no-tillage and conventional systems with crop residues of black oat (Avena strigosa). The experimental design was a randomized complete block with five repetitions. The treatments were divided into periods of CTWR and CWFP for 0, 7, 14, 28, 42, 63, and 126 days after the emergence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Competition; Control; Productivity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100229

Interferência do feijão-de-porco na dinâmica de plantas espontâneas no cultivo do milho orgânico em sistemas de plantio direto e convencional.
Provedor de dados: 21
Autores: Correa, Maria Lita Padinha; Galvão, João Carlos Cardoso; Fontanetti, Anastácia; Lemos, João Paulo; Conceição, Patricia Marluci da.
Objetivou-se avaliar a dinâmica populacional de plantas espontâneas durante quatro anos agrícolas no cultivo de milho exclusivo e consorciado com feijão-de-porco no sistema de plantio direto orgânico, intermediado por um plantio convencional. Os tratamentos foram: plantio direto com composto orgânico e aplicação de herbicidas (PDT); plantio direto com composto orgânico e utilização da roçada como método de controle das plantas espontâneas (PDO1); plantio direto com composto + feijão-de-porco na densidade de três plantas por metro linear e o controle das daninhas com a roçada (PDO2) e plantio direto com composto + feijão-de-porco na densidade de seis plantas por metro linear e o manejo das plantas espontâneas com a roçada (PDO3). Concluiu-se que o consórcio...
Tipo: Journal paper
Palavras-chave: Production systems Farming Systems Cereals; Pulses and oilseeds.
Ano: 2014
URL: http://orgprints.org/27388/1/Correa_Interfer%C3%AAncia%20do%20feij%C3%A3o%20de%20porco%20na%20din%C3%A3mica.pdf

International approach to agricultural research
Provedor de dados: 106
Autores: Osler, Robert D.
Palavras-chave: Corn; Maize; Agricultural research; Corn production; ข้าวโพด; การวิจัยทางการเกษตร; การผลิต.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3744

International Collaboration in Crop Improvement Research: Current Status and Future Prospects
Provedor de dados: 31
Autores: Traxler,   Greg; Pingali,   Prabhu L.
Investments over the past 35 years have created a system of national and international research centers that has revolutionized the supply of improved cereal varieties to developing country farmers. The newly created scientific ability to exploit genetic resources has been the engine of productivity growth in much of world agriculture. But the success that has been attained in building research institutions has not touched all countries or farmers, nor can it be considered permanent. The financial and political environment of the past decade has halted the expansion of agricultural research capacity and the scarcity of research resources and evolving world intellectual property rights (IPR) regimes complicates the search for stable arrangements for...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1999
URL: http://purl.umn.edu/7668

INTERNATIONAL CONFERENCE ON IMPACT OF AGRICULTURAL RESEARCH AND DEVELOPMENT: WHY HAS IMPACT ASSESSMENT RESEARCH NOT MADE MORE OF A DIFFERENCE?
Provedor de dados: 31
This document contains the proceedings of an international conference on impact assessment research held in San Jose, Costa Rica, from 4-7 February 2002. Co-organized by the Economics Program of the International Maize and Wheat Improvement Center (CIMMYT) and the Standing Panel on Impact Assessment (SPIA) of the Consultative Group on International Agricultural Research (CGIAR), the conference was attended by approximately 150 impact assessment practitioners and users. Participants included representatives from CGIAR Centers, national agricultural research organizations, public and private universities, multilateral lending organizations, development assistance agencies, non-governmental organizations (NGOs), philanthropic foundations, private...
Tipo: Book Chapter
Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2003
URL: http://purl.umn.edu/23724

International corn downy mildew nursery
Provedor de dados: 106
Autores: Somkiat Titatarn.
1 table
Palavras-chave: Corn; Maize; Downy mildew; Varieties; Infection; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4097

International training
Provedor de dados: 106
Autores: Smeltzer, Dale G.
9 tables
Palavras-chave: Corn; Maize; Mungbeans; Training programs; Variety trials; Mixed cropping; Nitrogen fertilizers; Growth; Yields; ข้าวโพด; โครงการฝึกอบรม.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3885

International training
Provedor de dados: 106
Autores: Smeltzer, Dale G.
8 tables
Palavras-chave: Corn; Maize; Training programs; Varietal trials; Varieties; Fertilizer trials; Population density trials; Soil management trials; Crop management; Weed control; Plant breeding; Downy mildew; Growth; Yields; ข้าวโพด; โครงการฝึกอบรม.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3813

International training program
Provedor de dados: 106
Palavras-chave: Corn; Maize; International training program; ข้าวโพด; การอบรม.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3916

International training programs
Provedor de dados: 106
Autores: Smeltzer, Dale G.
13 tables
Palavras-chave: Corn; Maize; Training programs; Variety trials; Fertilizer trials; Population density trials; Mixed cropping; Crop management; Soil management; Pest control; Plant breeding; Growth; Yields; ข้าวโพด; โครงการฝึกอบรม.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3847

Interpreting soil organic matter characteristics in organic farming systems
Provedor de dados: 21
Autores: Wander, Michelle M.; Marriott, Emily E.; Wang, Yun.
Soil organic matter (SOM) fraction characteristics need to be developed as indicies that can be related to specific soil functions.  The general effects of organic management on prominsing indicies of SOM status (POM and a rapid measure of base hydrolyzable N) were determined by comparing the characteristics of organic and conventionally managed soils obtained from nine long-term trials in North America.  In addition, a more detailed study was conducted of POM and of hydrolyzable N fractions (including amino-acids, amino sugars) at a site where use of organic practices failed to increase SOM.  In the multi-site comparrison, legume- and manure-based organic systems performed equally well in their ability to increase the quantity of SOM as well as enrich the...
Tipo: Conference paper, poster, etc.
Palavras-chave: Specific methods.
Ano: 2005
URL: http://orgprints.org/4495/4/Wander_etal_4p_revised%2Ded.doc

Intoxication of Mesotrione in Corn Inoculated with Azospirillum brasilense and with Application of Plant Growth Regulators
Provedor de dados: 87
Autores: BULEGON,L.G.; GUIMARÃES,V.F.; BATTISTUS,A.G.; COSTA,N.V.
ABSTRACT: The objective of this study was to evaluate the effect of intoxication by mesotrione herbicide on the initial development and yield of maize after seed inoculation or foliar spray application with Azospirillum brasilense and application of plant regulators. Therefore, three experiments were performed: one under greenhouse conditions and two under field conditions, in different locations. In all experiments, a randomized block design was used with a 2 x 4 factorial arrangement, representing presence (192 g ha-1) or absence of mesotrione and four treatments corresponding to the control; seed inoculation with A. brasilense; foliar spray application of A. brasilense; foliar spay application of auxin + gibberellin + cytokine (AX + GA + CK), and foliar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Gas exchange; Fluorescence of chlorophyll a; Peroxidase; Catalase.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100257

Introdução e avaliação de milho doce na região do Baixo Parnaíba.
Provedor de dados: 14
Autores: SOUZA, I. R. P. de; MAIA, A. de H. N.; ANDRADE, C. de L. T. de.
bitstream/item/72669/1/CPAMN-PESQ.-AND.-3-90.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Cultivo; Piauí; Brasil; Maize.; Milho Doce.; Brazil.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/78192

Introducing Different Land Uses (Irrigated and Non-Irrigated) in Policy Analysis Modelling for Mediterranean Countries
Provedor de dados: 31
Autores: Casado,   Jose Maria; Gracia,   Azucena.
The arable crop sector in Spain is highly dependent of the Community subsidies and account for 33% of total transfers received by the Community.  Then, it is expected that the introduction of the Single Farm Payment (SFP) will drive important changes in the arable crop production in Spain.  The quantitative assessment of the SFP impacts on the arable crop sector in Spain is the overall objective of this paper.  To achieve this goal, an econometric, dynamic, multi-product and partial equilibrium commodity model has been built disaggregating between irrigated and non-irrigated land use for cereals called Spanish Econometric Simulation of Agricultural Policies (SESAP).  Results indicated that the introduction of the SFP has only induced considerable changes...
Tipo: Conference Paper or Presentation
Palavras-chave: CAP reform; Partial equilibrium model; Policy modelling; Irrigated agriculture; Simulation; Land Economics/Use; Q12; Q18.
Ano: 2006
URL: http://purl.umn.edu/25709

Introgresion of heterotic segment in an inbred line of maize (Zea mays L.)
Provedor de dados: 46
Autores: Salerno,Juan Carlos; Kandus,Mariana; Boggio Ronceros,R.; Almorza,David.
In order to increase the efficiency in the production of maize hybrids seeds it is necessary high grain yield with a relative low cost of production. It needs an expansion of the basic knowledge of the heredity of the characters that may be developing new breeding technique. The balanced lethal system (BLS) permit to study the relative contribution of different chromosome segments to hybrid vigour due to the heterocigozity of certain chromosome segments while the rest of the genome go to homocigozity for continuous selfing . In this way, theses segments can be transfer to inbreed lines in order to increase the grain yield and tassel size with pollen production. The objective of this work was to transfer heterotic segments of a line regulated by a balanced...
Tipo: Info:eu-repo/semantics/article
Ano: 2008
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332008000100008

Investigation of the factors influencing adoption of GM crops at country level
Provedor de dados: 31
Autores: Hall,   Clare; Toma,   Luiza; Moran,   Dominic.
With the possible exception of nuclear technology, few scientific breakthroughs have generated the level of emotive debate that has surrounded the roll-out of agricultural biotechnology. Initial discussion about the environmental impacts of agricultural genetic modification, are now frequently juxtaposed with counter-claims that the technologies could actually be part of a wider global environmental solution in relation to climate change mitigation and food shortages. This study tests whether there are any consistent messages on why some countries seem to be advancing adoption of the technology, while others are not. We consider the range of claims in existing literature on adoption tendencies and then use structural equation modelling to test and estimate...
Tipo: Conference Paper or Presentation
Palavras-chave: Genetically modified crops; Structural equation model; Global adoption.; Agricultural and Food Policy; Crop Production/Industries; Environmental Economics and Policy; Institutional and Behavioral Economics; International Relations/Trade; Land Economics/Use; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2009
URL: http://purl.umn.edu/50366

Investigation on the farmers opinions of the recommended corn varieties
Provedor de dados: 106
Autores: Sanga Duangratana; Sunantha Vesaurai; Amorn Vatanasan; Sutteraporn Sirisingh.
9 tables
Palavras-chave: Corn; Maize; Varieties; Seed rate; Fertilizers; Pesticides; Pest insects; Yields; ข้าวโพด; การผลิต.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3944

Invitation and proceedings of LIVESEED, ECO-PB, CPVO workshop on Heterogeneous Material and Organic Varieties
Provedor de dados: 21
The European Project LIVESEED on boosting organic seed  and plant breeding across Europe (www.liveseed.eu) and the European Consortium of Organic Plant Breeding (ECO-PB, www.eco-pb.org) aim to discuss opportunities and hallenges of registration of heterogeneous material and organic varieties with the CPVO, the national examination offices (EO) and the observers (DG Sante, ESA, Plantum, EPO,POV, CIOPORA, BLW, Food Safety Authority). We will present the scientific concept of heterogeneous material, first results and experiences of the running “temporary experiment providing for certain derogations for the marketing of populations” and discuss possible tools to identify, describe and trace such material. Further, we would like to discuss consequences of the...
Tipo: Proceedings
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2018
URL: http://orgprints.org/34831/9/Invitation.pdf

Irreversibility, Uncertainty and the Adoption of Transgenic Crops: the Case of BT-Maize in France
Provedor de dados: 31
Autores: Scatasta,   Sara; Wesseler,   Justus; Demont,   Matty.
This study applies a real option approach to quantify, ex-ante, the maximum incremental social tolerable irreversible costs that would justify immediate adoption of Bt maize in France. Based on field trials, we find that incremental private reversible benefits in the agricultural sector are -18 million euro yearly for maize for animal feed and 1 million euro yearly for maize for human consumption. Incremental social irreversible benefits from reduced insecticide use are negligible. The maximum incremental social tolerable irreversible costs are -28 million euro yearly for maize for animal feed and 0.4 million Euro yearly for maize for human consumption.
Tipo: Conference Paper or Presentation
Palavras-chave: Bt maize; Real option; France; Field trials; Irreversible social costs; Crop Production/Industries; D6; D8; Q1.
Ano: 2005
URL: http://purl.umn.edu/24758

Irrigacao do milho para silagem manejada com tensiometros sob pivo-central.
Provedor de dados: 14
Autores: AZEVEDO; J. A. de; ROCHA, C. M. C. da.
bitstream/CPAC-2009/24159/1/p2002_46.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize.; Irrigação; Manejo de Água; Milho; Silagem; Zea Mays.; Irrigation; Silage; Water management.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567468

Irrigacao por capsulas porosas IV: efeitos das diferentes pressoes hidrostaticas e populacoes de plantas sobre a producao do milho.
Provedor de dados: 14
Autores: SILVA, D. A. da; GHEYI, H. R.; SILVA, A. de S.; MAGALHAES, A. A.
Consistiu na determinacao do efeito das diferentes pressoes hidrostaticas e populacoes de plantas atraves do metodo de irrigacao por capsulas porosas, sobre a producao do milho (Zea mays L.), cultivar Centralmex. O plantio do milho foi realizado manualmente, sendo as sementes distribuidas em numero de tres por cova, num raio de 20 cm e, igualmente, espacadas ao redor de cada capsula porosa. No presente trabalho a populacao de sete plantas por capsula porosa apresentou a maxima producao que convertida para uma densidade de 50.000 plantas por hectare corresponderia a producao estimada de 6.150 kg/ha. O metodo de irrigacao em estudo apresentou alta eficiencia de uso de agua, em media 1,9 kg/m3 que representa quase o dobro das eficiencias conseguidas pelos...
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Capsula porosa; Porous capsule; Hydrostatic pressure; Maize; Production; Irrigação; Milho; Produção; Zea Mays; Irrigation.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133278

Irrigation as an alternative to reduce damages caused by defoliation of sweet corn
Provedor de dados: 75
Autores: Santos,Osvaldir F; Lima,Sebastião F; Piati,Gabriel Luiz; Barzotto,Gustavo R; Gava,Ricardo.
ABSTRACT Reduction of leaf area significantly affects maize productivity, due to its low plasticity. Thus, appropriate water application can minimize this problem, considering that under favorable water conditions the plant would express its maximum production potential. The aim of this study was to evaluate the influence of irrigation on the productive performance of sweet corn submitted to different defoliation levels at the beginning of crop cycle. The experimental design was a randomized block design, arranged in split plot scheme; plots consisting of four water depths [50, 75, 100 and 125% of crop evapotranspiration (ETc)] and the subplots consisted of three defoliation levels [0% (control); 35% (removal of four fully expanded leaves), 100% (total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Water availability; Leaf area; Grain yield.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300341

Irrigation Technology and Commercialization of Rice in the Gambia: Effects on Income and Nutrition
Provedor de dados: 31
Autores: von Braun,   Joachim; Puetz,   Detlev; Webb,   Patrick.
With its focus in irrigation technology and commercialization of rice in West Africa, this study addresses the question of how agricultural growth in Sub-Saharan Africa may improve food security. Over the last few decades in Africa, rice has ranked second after maize among cereal that have contributed to the overall growth of cereal output.  In West Africa, rice imports have grown rapidly during the last two decades. Future decisions on irrigation investments and technology choices will be critical importance in view of numerous past failures and excessive costs of irrigation in Sub-Saharan Africa. This research by Joachim Von Braun, Detlev Puetz, and Patrick Webb is to be seen against the backdrop of policy priorities resulting from the earlier work of...
Tipo: Report
Palavras-chave: Rice trade; Gambia; Irrigation; Economic aspects; Food supply; Income; Crop Production/Industries; Food Consumption/Nutrition/Food Safety.
Ano: 1989
URL: http://purl.umn.edu/42167

Is Futures Market Mitigating Price Risk: An Exploration of Wheat and Maize Market
Provedor de dados: 31
Autores: Singh,   N.P.; Kumar,   Ranjit; Singh,   R.P.; Jain,   Praveen Kumar.
Instability of commodity prices has always been a major concern of the producers as well as the consumers in an agriculture-dominated country like India. Farmers in a bid to avert the price risk often tend to go for distress sale and thereby reduce the potential returns. In order to cope up with this problem, futures trading has emerged as a viable option for providing a greater degree of assurance on the price front. Thus, futures markets serve as a risk -shifting function. In the present study, an attempt has been made to look into the mechanism of movement of spot and futures prices for two important food crops in Indian agriculture. The Augmented Dickey Fuller (ADF) test has been used for both the crops to check the stationarity of the time series...
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy.
Ano: 2005
URL: http://purl.umn.edu/58459

Is Older Better? Maize Hybrid Change on Household Farms in Kenya
Provedor de dados: 31
Autores: Smale,   Melinda; Olwande,   John.
Kenya has been recognized globally as maize success story since the 1970s. Released on the eve of independence, Kenya’s first maize hybrid diffused faster than did hybrids in the U.S Corn Belt during the 1930s-1940s. In recent decades, policy researchers have lamented that earlier gains in maize productivity have not lived up to their potential. Claims of stagnating yields and stagnating adoption are offset here, at least in part, by longitudinal survey data showing rising yields and adoption rates on farms. Tegemeo survey data confirm that Kenya has reached its adoption ceiling years ago in the major maize producing zones of the country, and is near to doing so in other zones. Data show adoption rates topping 80% of farmers.
Tipo: Working Paper
Palavras-chave: Maize; Kenya; Africa; Household farms; Agricultural and Food Policy.
Ano: 2011
URL: http://purl.umn.edu/118474

Is there a Weed Shift in Roundup Ready Maize?
Provedor de dados: 17
Autores: Arnd Verschwele.
The cultivation of transgenic glyphosate-resistant crop varieties can simplify weed control in crops such as maize and others. On the other hand, the repeated use of broadly effective herbicides like glyphosate, especially in the same crop, can have a negative effect on biodiversity. Additionally there is a risk for a spread of more tolerant or even resistant weed species.&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;It was the aim of a 6-years field study (2003-2008) to investigate weed effects of use of glyphosate in a continuous transgenic herbicide-resistant maize rotation at three sites in Germany. These sites differed significantly in terms of soil, climate and initial weed spectrum. The studies focussed on the comparison between local herbicide standards and...
Tipo: Poster
Palavras-chave: Biotechnology; Plant Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4527/version/1

Isoenzymatic variability in tropical maize populations under reciprocal recurrent selection
Provedor de dados: 63
Autores: Pinto,Luciana Rossini; Vieira,Maria Lúcia Carneiro; Souza Jr.,Cláudio Lopes de; Silva,Rainério Meireles da.
Maize (Zea mays L.) is one of the crops in which the genetic variability has been extensively studied at isoenzymatic loci. The genetic variability of the maize populations BR-105 and BR-106, and the synthetics IG-3 and IG-4, obtained after one cycle of a high-intensity reciprocal recurrent selection (RRS), was investigated at seven isoenzymatic loci. A total of twenty alleles were identified, and most of the private alleles were found in the BR-106 population. One cycle of reciprocal recurrent selection (RRS) caused reductions of 12% in the number of alleles in both populations. Changes in allele frequencies were also observed between populations and synthetics, mainly for the Est 2 locus. Populations presented similar values for the number of alleles per...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Genetic markers; Genetic variability; Isozymes; Population improvement.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200013

Isoenzymatic variation in the germplasm of Brazilian races of maize (Zea mays L.)
Provedor de dados: 74
Autores: Gimenes,Marcos Aparecido; Lopes,Catalina Romero.
There are more than 200 races of maize (Zea mays L.) divided into three groups (ancient commercial races, the recent commercial races, and indigenous races). Although the indigenous races have no commercial value, they have many important characteristics which can be incorporated into maize breeding programs. Most Brazilian indigenous germplasm race stocks were collected at least 40 years ago, and nothing is known of the genetic variability present in this germplasm. The genetic variability was assayed in 15 populations from four indigenous races of maize (Caingang, Entrelaçado, Lenha and Moroti) and five indigenous cultivars, using five isoenzymatic systems encoded by 14 loci. The analysis revealed a low level of variability among the samples studied....
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000200023

Isolamento, caracterização e seleção de estirpes de Azospirillum amazonense e Herbaspirillum seropedicae associadas a diferentes variedades de milho cultivadas no Cerrado.
Provedor de dados: 14
Autores: REIS JÚNIOR, F. B. dos; MACHADO, C. T. de T.; MACHADO, A. T.; MENDES, I. de C.; MEHTA, A.
bitstream/CPAC-2010/30247/1/bolpd-206.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Maize.; Milho; Zea mays; Microbiologia do solo; Soil; Microbiology.
Ano: 2008
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/571865

Isolation of endophytic actinomycetes from roots and leaves of maize (Zea mays L.)
Provedor de dados: 52
Autores: Araújo,Janete M. de; Silva,Adilson C. da; Azevedo,João L.
Actinomycetes were isolated from surface sterilized leaves and roots of maize. A total of 53 isolates were obtained, 31 of them from leaves and 22 from roots. The genus Microbispora was the most frequently found followed by the genera Streptomyces and Streptosporangium. From the isolated actinomycetes, 43.4% showed antimicrobial activity against one or more tested bacteria and yeast.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endophytes; Maize; Actinomycetes; Microbispora; Streptomyces; Streptosporangium.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400016

Isolation of Mucorales from processed maize (Zea mays L.) and screening for protease activity
Provedor de dados: 58
Autores: Santiago,André Luiz Cabral Monteiro de Azevedo; Motta,Cristina Maria de Souza.
Mucoraleswere isolated from maize flour, corn meal and cooked cornflakes using surface and depth plate methods. Rhizopus oryzae, Circinella muscae, Mucor subtilissimus,Mucor hiemalis f. hiemalis, Syncephalastrum racemosum, Rhizopus microsporus var. chinensis and Absidia cylindrospora showed protease activity.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zygomycetes; Food; Contamination; Isolation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400019

Isotopic composition of maize as related to N-fertilization and irrigation in the Mediterranean region
Provedor de dados: 63
Autores: Lasa,Berta; Irañeta,Iosu; Muro,Julio; Irigoyen,Ignacio; Aparicio Tejo,Pedro María.
Nitrate leaching as a result of excessive application of N-fertilizers and water use is a major problem of vulnerable regions. The farming of maize requires high N fertilization and water inputs in Spain. Isotopic techniques may provide information on the processes involved in the N and C cycles in farmed areas. The aim of this work was studying the impact of sprinkler and furrow irrigation and N input on maize (Zea mays L.) yields, and whether isotopic composition can be used as indicator of best farming practices. Trials were set up in Tudela (Spain) with three rates of N fertilization (0, 240 and 320 kg urea-N ha-1) and two irrigation systems (furrow and sprinkler). Yield, nitrogen content, irrigation parameters, N fate and C and N isotope composition...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Furrow irrigation; Nitrogen; Sprinkler irrigation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200008

Joint evolution of spatial integration and product segmentation on agricultural markets: the case of cereals in Mali
Provedor de dados: 31
Autores: Aubert,   Magali; Bignebat,   Celine; Egg,   Johny.
Within the context of liberalisation experienced by the Malian economy since the beginning of the 1990s, spatial integration of cereal markets has been considered as a major tool as to avoid localised shortages due to production shortfalls. However, market dynamic reveals since then new patterns: the diversification of urban consumer demand towards "modern cereals", in particular rice and maize, drives the segmentation of the cereal market. As consumer s are likely to substitute traditional cereals, like millet and sorghum, for other cereal types, new market segments emerge. We account for this evolution with a theoretical model à la Hotelling : the good is considered according to two characteristics, the spatial localisation (local market) and the cereal...
Tipo: Conference Paper or Presentation
Palavras-chave: Product differentiation; Co- integration; Cereals; Mali; Marketing.
Ano: 2006
URL: http://purl.umn.edu/10103

Journal of International Agricultural Trade and Development, Volume 4, Number 2, Fall 2008
Provedor de dados: 31
Content: (1) Scoppola, Margherita. "Regional Integration and Production Location: What Theories (Do Not) Tell Us." (pp. 117-140); (2) Hendricks, Nathan P., and Lawton Lanier Nalley. "Who Benefits from Global Agricultural Trade Liberalization? The Case of Wheat and Maize." (pp. 141-158); (3) Wilson, William W., and Scott R. Huso. "Impacts of a Genetically Modified Fusarium Resistant Trait on Conventional Fungicide Prices and Demand." (pp. 159-176); (4) Rude, James, Derek Brewin, and Martin White. "Third Country Effects of Price Discrimination: The Case of the Canadian Wheat Board." (pp. 177-196); (5) Babula, Ronald A., and Lund Mogens. "The Emergence of U.S. Demand for Pork as an Input: Applying the Cointegrated Vector Autoregression Model to U.S....
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy; International Development; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/49181

Journal of International Agricultural Trade and Development, Volume 5, Issue 1
Provedor de dados: 31
Table of Contents: (1) Baboola, Ashfaqul, Michael Reed, Sayed Saghaian, and Vijay Subramaniam: "Food Safety Standards and Export Competitiveness in the Processed Food Industries of Asia-pacific Countries, pp. 1-10;  (2) Nalley, Lawton Lanier, Andrew P. Barkley, John M. Crespi, and Ken D. Sayre: "The Global Impact of the CIMMYT Wheat Breeding Program," pp. 11-30; (3) Kim, Hanho, Munisamy Gopinath, and Jae-Kyung Kim: "Competition Between China and the United States in the Korean Food Market," pp. 31-50; (4) Rahman, Sanzidur: "The Economic Determinants of Crop Diversity on Farms in Rural Bangladesh," pp. 51-70; (5) Muhammad, Andrew, and Ardian Harri: "Pricing-to-Market and Exchange Rate Pass-Through in European Import Markets: The Case of Fish from Lake...
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy; International Development; International Relations/Trade.
Ano: 2009
URL: http://purl.umn.edu/96776

Kinetics of phosphorus uptake and root morphology of local and improved varieties of maize
Provedor de dados: 63
Autores: Machado,Cynthia Torres de Toledo; Furlani,Ângela Maria Cangiani.
Interspecific and intraspecific differences in the efficiency of utilization of soil phosphorus (P) are explained, in part, by plant morphological and physiological variations, which characterize the plant for nutrient acquisition. As part of a study on maize genotypes characterization for P-uptake and use efficiency, kinetic parameters of P uptake and root morphological characters were evaluated for six local and improved maize varieties, grown in nutrient solution. The kinetic parameters related to P influx were: maximal transport rate (Vmax), the Michaelis-Menten constant (Km), and the external concentration when net uptake is zero (Cmin). Measured root morphological characters were: root length, radius, and surface area. Shoot and root dry matter yield...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic variability; Phopshorus acquisition; Kinetics parameters; Root system; Nutritional efficiency.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000100012

Klassifizierung von pflanzlichen Produkten aus ökologischem  und konventionellem Anbau durch Messung sekundärer Pflanzenstoffe
Provedor de dados: 21
Autores: Roose, M.; Kahl, J.; Ploeger, A.
The content of secondary plant compounds in plants is influenced by various environmental  factors. Cultivation and fertilization are factors which are characteristic for the  farming system organic or conventional. Within a german governmental funded project  (BÖL02OE170/F) carrot, maize and wheat samples from different farming systems  (defined trials and farm pairs) are differentiated and classified using their polyphenolic  and carotenoid contents and profiles, respectively.  The samples from organic farming could be differentiated from samples which were  conventionally grown as statistical significant for carrot and wheat samples in a two  year repetition. The samples could be classified by both, polyphenolic as well as  carotenoid profiles. The sum...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health.
Ano: 2009
URL: http://orgprints.org/14186/1/Roose_14186.pdf

Klimavenlig majs ved minimal tilførsel af kvælstof
Provedor de dados: 21
Autores: Ambus, Per.
Majs-biomasse kan omdannes til klimavenlig CO2-neutral energi ved behandling til bioetanol og biogas. Men gødskes majsen med affaldet fra biogasanlægget, dannes der betragtelige mængder af den kraftige drivhusgas, lattergas. Herved reduceres klimagevinsten mærkbart. Dyrkning af majs til energiformål skal derfor ske med ingen eller lille tilførsel af N.
Tipo: Newspaper or magazine article
Palavras-chave: Social aspects; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/15811/1/15811.pdf

Knolcyperus (Cyperus esculentus L.) in opmars in Nederland
Provedor de dados: 16
Autores: Mennema, J.
In the eastern part of the province of Noord-Brabant and in the northern part of the province of Limburg, Cyperus esculentus, for the first time recorded in the Netherlands in 1975 as an alien, has developped explosively, especially in maize-fields.
Tipo: Article / Letter to the editor
Ano: 1984
URL: http://www.repository.naturalis.nl/record/527858

Kohlenstoffflüsse und mikrobielle Diversität
Provedor de dados: 21
Organic farming is one of the most promising alternatives to intensive agriculture. Crop plant-soil interactions are complex and influenced by agricultural practice. Many efforts have been done to elucidate the effects of different farming systems on crop growth, nutrient availability, soil quality and biodiversity. Many studies however are short-termed and rely on laboratory rather than comparative field experiments. The DOK field trial at Therwil (Basel-Land, Switzerland) is one of the few long-term field trials that compare organic and integrated farming systems since 1978 (Mäder et al. 2002, http://www.fibl.org/). Soils of this field trial have been extensively studied with respect to soil nutrient delivery, soil biology and microbial biodiversity....
Tipo: Project description
Palavras-chave: Nutrient turnover; Soil.
Ano: 2023

Kombinierter Anbau von Energie- und Futterpflanzen im Rahmen eines Fruchtfolgegliedes - Beispiel Direkt- und Spätsaat von Silomais nach Wintererbsenvorfrucht
Provedor de dados: 21
Autores: Graß, Rüdiger; Scheffer, Konrad.
Bei der in Zukunft zu erwartenden und politisch forcierten Ausweitung der Nutzung regenerativer Energien wird die Biomassenutzung eine bedeutende Rolle spielen. Die in der Biomasse gespeicherte Sonnenenergie ist im Gegensatz zu anderen regenerativen Energieträgern jederzeit und bei jeder Witterung verfügbar.  In der Diskussion um den Anbau von Biomasse zur energetischen Nutzung wird vor allem die Frage aufgeworfen, wie ein solcher Biomasseanbau möglichst umweltgerecht und zugleich hochproduktiv gestaltet werden kann. Ferner wird darauf hingewiesen, dass der Energiepflanzenanbau mit dem Anbau von Nahrungs- und Futterpflanzen um die landwirtschaftlichen Flächen konkurriert. Dies wird besonders im Ökologischen Landbau (ÖL) kritisch betrachtet, da aufgrund des...
Tipo: Conference paper, poster, etc.
Palavras-chave: Root crops; Crop husbandry.
Ano: 2003
URL: http://orgprints.org/1265/1/pflanznebaut%2Denergepfl.pdf

Konzepte und Strategien der Biogaserzeugung im Ökologischen  Landbau – Ergebnisse des Bio-Biogas-Monitoring 2007
Provedor de dados: 21
Autores: Anspach, Dipl.-Ing.agr. Victor; Möller, Prof. Dr. Detlev.
Biogas production is becoming increasingly important for organic farms. Based on an  empirical study, designed as a census, the structure and specifics of organic biogas  production were investigated. Today an estimated 150 organic biogas plants in  Germany exist; this corresponds to 5% of all biogas plants. The number of plants has  doubled since 2004 and the installed electric. power has increased six-fold. Mainly  organic farms with long experience in organic farming have started biogas production.  Most characteristic for organic biogas plants is first the intensive use of low-priced  substrates like manure and grass-clover, but also maize silage is used. Secondly the  average use of waste heat is very high and utilised in many different ways. Thirdly...
Tipo: Conference paper, poster, etc.
Palavras-chave: Produce chain management; Farm economics.
Ano: 2009
URL: http://orgprints.org/14299/1/Anspach_14299.pdf

KU 257 sorghum and Thai opaque corn in broiler and growing pig rations
Provedor de dados: 106
Autores: Prateap Rachapaetayakom; Narm Sirisatern; Supaporn Isariyodom.
7 tables
Palavras-chave: Broiler chickens; Pigs; Rations; Corn; Maize; Sorghum; KU 257; Opaque-2; Feeding; Feeds; Ingredients; Growth; Carcass quality; Feed conversion efficiency; Costs; ข้าวโพด; ข้าวฟ่าง; พันธุ์เคยู 257; โอเพค 2; สูตรอาหาร; ไก่กระทง; สุกร.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3990

La conservacion de residuos en los sistemas de produccion de maíz en Ciudad Guzman y San Gabriel, Jalisco
Provedor de dados: 31
Autores: Erenstein,   Olaf.
La tecnología de conservación de los residuos del cultivo, mejor conocida como labranza de conservación, brinda la posibilidad de incrementar la productividad y la sustentabilidad de los sistemas agrícolas en zonas con escasez de agua. La tecnología propone el uso de los residuos de la cosecha anterior como mantillo protector del suelo, con el propósito de lograr efectos benéficos en la conservación del suelo y del agua. Este estudio revisa el potencial de la tecnología en los sistemas de producción de maíz de temporal en una zona de estudio en el sureste del estado de Jalisco, México. La adopción actual de la tecnología en la zona de estudio es mínima (aproximadamente 1%), aunque una tercera parte de los productores sí la conoce. El estudio muestra que la...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/7685

La diversidad y prácticas de manejo de los animales domésticos en la región de la montaña del estado de Guerrero.
Provedor de dados: 32
Autores: López Gordillo, José Antonio.
Se analizó la diversidad de los animales domésticos presentes y las prácticas de manejo en la región de la Montaña del estado de Guerrero. En el estudio se realizaron 207 entrevistas a productores para registrar información de la familia, la  ganadería, los recursos naturales utilizados y las prácticas de manejo. Los datos se analizaron con el paquete estadístico SAS. Se estimaron los estadísticos descriptivos para las variables de las explotaciones y los indicadores de la presencia de los animales domésticos. La función social y productiva de cada especie ganadera se determinó con regresión logística. La población promedio de animales en la explotación estuvo determinada por las aves (18.3), caprinos (14.8), bovinos (12.3), ovinos (9.4), cerdos (6) y...
Palavras-chave: Densidad de ganado; Indice de diversidad; Peso vivo; Regresión logística; Sanidad; Alimentación; Livestock density; Diversity index; Live weight; Logistic regression; Health management; Feeding practices; EDAR; Estrategias para el Desarrollo Agrícola Regional; Maestría Tecnológica; Desarrollo Sostenible de Zonas Indígenas.
Ano: 2010
URL: http://hdl.handle.net/10521/359

La integración económica del mercado de maíz entre México y Estados Unidos, y su relación con el ingreso de los productores rurales.
Provedor de dados: 32
Autores: Ramos Castro, José Guadalupe.
En esta investigación se examinó la relación entre los precios del mercado de maíz de México y los precios del mercado de maíz de los Estados Unidos y su vinculación con los pequeños productores del grano. El concepto teórico de la Ley de un solo Precio (LOP) fue utilizada para determinar integración comercial del mercado de maíz entre ambos países. La estimación econométrica, utilizando análisis de cointegración y un Vector de Corrección de Errores, muestra que las series de precios analizadas están cointegradas en el largo plazo, la Ley de un solo Precio se cumple, lo cual es evidencia de integración entre los mercados. Los movimientos de los precios internacionales determinan el movimiento de los precios en México, estos últimos tardan entre 13 a 18...
Palavras-chave: Cointegración; Vector de corrección de error; Maíz; Pequeños productores; Co-integration; Vector error correction model; Maize; Peasants; Maestría; EDAR; Estrategías para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/373

La producción de cabras en la cañada de Huamuxtitlán, estado de Guerrero.
Provedor de dados: 32
Autores: Melchor García, Juan.
Se caracterizó el sistema de producción y el tipo de cabras en la Cañada de Huamuxtitlán en la Montaña de Guerrero. Se realizaron 70 entrevistas con un cuestionario en el que se registró información de la familia, tierra, cultivos, prácticas de manejo y la comercialización. Para la caracterización de las cabras se midieron 263 cabras adultas. Se registró el sexo, raza, edad, caracteres externos y 18 variables zoométricas. La información del sistema de producción y de las cabras se analizó mediante estadística descriptiva, análisis de varianza y técnicas multivariantes. La edad promedio de los productores es de 47.6±14.5 años y la escolaridad promedio es de 5±2.7 años. El cultivo predominante es la asociación de maíz-calabaza-frijol, con una superficie de...
Palavras-chave: Manejo; Tipología de productores; Tipo de cabras; Zoometría; Body traits; Farmer typology; Goat breeds; Management practices; Desarrollo Sostenible de Zonas Indígenas; Maestría Tecnológica.
Ano: 2013
URL: http://hdl.handle.net/10521/2191

La tecnología campesina en la producción de maíz y el traspatio como estrategia de desarrollo agrícola en San Nicolás de los Ranchos, Puebla.
Provedor de dados: 32
Autores: López González, José Luis.
Las familias campesinas en México han basado su dieta en alimentos obtenidos a través de sistemas de producción tradicionales como la milpa y el traspatio o solar, constituyéndose en estrategias de sobrevivencia esenciales. En este sentido la presente investigación tuvo como objetivo: generar elementos para una estrategia de desarrollo agrícola sustentada en el manejo tradicional que los campesinos de San Nicolás de los Ranchos le proporcionan al traspatio y al cultivo del maíz en sus predios. Para la recopilación de la información en el 2011 se aplicó una encuesta a un tamaño de muestra de 77 productores de maíz del municipio. Para la interpretación de los resultados, se elaboraron tipologías de productores de acuerdo al estudio. En los resultados, se...
Palavras-chave: Estrategias de sobrevivencia; Manejo del maíz; Pluriactividad y traspatio; Tecnologías formal e informal; Formal and informal; Management of maize technologies; Pluri-activity and backyard; Survival strategies; Estrategias para el Desarrollo Agrícoal Regional; EDAR; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1972

Labor requirements and profitability of alternative soil fertility replenishment technologies in Zambia
Provedor de dados: 31
Autores: Ajayi,   Olu Clifford; Akinnifesi,   Festus K.
Low soil fertility is a major concern in agricultural productivity and development policy discourse in sub-saharan Africa. The problem is exacerbated by government withdrawal from fertilizer input markets and the inability of private sector operators to fill the gap. This warranted a search for other nutrient sources to supplement chemical fertilizers. Based on field data collected in Zambia, this study assessed the labor inputs implications of “improved tree fallows”, continuous maize cropping with and without mineral fertilizer and, evaluated the financial profitability of the different land use systems. Results show that agroforestry-based land use systems are more profitable (NPV between $233 and $309 per ha) than farmers’ practice of continuous maize...
Tipo: Conference Paper or Presentation
Palavras-chave: Agroforestry; Improved tree fallows; Financial analysis; Production economics; Southern Africa; Sustainable agriculture; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Land Economics/Use; Production Economics; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/52185

Laboratory Protocols 2008: Maize Nutrition Quality and Plant Tissue Analysis Laboratory
Provedor de dados: 31
Autores: Gallicia,   L.; Nurit,   E.; Rosales,   A.; Palacios-Rojas,   N.
Tipo: Report
Palavras-chave: Zea mays; Maize; Wheats; Triticum; Transgenic plants; Genetic engineering; Gene transfer; Genetic transformation; DNA hybridization; Phenotypes; Selection; Tissue culture; In vitro culture; Biolistics; Research projects; Methods; Molecular cloning; PCR; Crop Production/Industries; F02; F30.
Ano: 2009
URL: http://purl.umn.edu/56177

Laboratory Protocols CIMMYT Applied Molecular Genetics Laboratory
Provedor de dados: 31
Autores: Warburton,   Marilyn.
Third Edition
Tipo: Report
Palavras-chave: Chemiluminescence immunoassays; DNA; DNA hybridization; Molecular markers; PCR; RFLPs; Research and Development/Tech Change/Emerging Technologies; F30.
Ano: 2005
URL: http://purl.umn.edu/56184

Labour inputs and financial profitability of conventional and agroforestry-based soil fertility management practices in Zambia
Provedor de dados: 31
Autores: Ajayi,   Olu Clifford; Akinnifesi,   Festus K.; Sileshi,   G.; Kanjipite,   W.
Several agro-ecological practices have been developed to increase the range of soil fertility management options available to farmers, but little information is available on their labour input requirement and profitability relative to conventional practices. This study used a multiple visit cost-route method to estimate labour inputs and financial profitability of agroforestry-based and conventional (with and without fertiliser) soil fertility management practices in eastern Zambia. Results show that aggregated over a five-year cycle, labour inputs used under agroforestry practices were lower than fertilised maize fields but higher than non-fertilised continuous cropped maize. Agroforestry practices were more profitable (NPV ranging between $233 and $327...
Tipo: Journal Article
Palavras-chave: Benefit-cost analysis; Impact assessment; Land use management; Project analysis; Sustainable agriculture; Demand and Price Analysis; Land Economics/Use.
Ano: 2009
URL: http://purl.umn.edu/55046

Lachgasemission und Nitratauswaschung verschiedener Futterproduktionssysteme in Abhängigkeit von der Vornutzung
Provedor de dados: 21
Autores: Bunne, Inga; Kluß, Christof; Loges, Ralf; Herrmann, Antje; Taube, Friedhelm.
Intensified agriculture is often associated with nitrous oxide (N2O) emissions and nitrate (NO3) leaching losses into groundwater due to high application rates of N-fertilizer, increasing maize cultivation and ploughing up permanent grassland. N2O is an important anthropogenic greenhouse gas and agriculture is one of the main polluters. NO3 leaching endangers groundwater quality. In a field experiment on the organically managed farm “Lindhof” in Northern Germany three different forage production systems (1. crop rotation, 2. continuous silage maize 3. permanent grassland) were established parallelly after a) ploughing up permanent grassland and b) longtime arable use. N2O emissions were measured weekly over the two-year experimental period. Soil water...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general.
Ano: 2015
URL: http://orgprints.org/27208/1/27208_bunne.pdf

Land property, tenure security and credit access: a historical perspective of change processes in China
Provedor de dados: 31
Autores: Jia,   Xiangping; Piotrowski,   Stephan.
The North China Plain is the country's granary: most of wheat and maize is supplied by this region in the northeast of China. Intensity of agricultural production has risen sharply in the last decades and the negative environmental effects like water scarcity, salinization and nitrate contamination have been widely acknowledged. In the wake of the country's rapid economic development it becomes at the same time more and more urgent to narrow the gap between the well-being of the urban and rural population.  In order to better understand the paths that lead to this present dilemma, this paper provides a historical overview of the development of the land and water markets and the rural financial system. It highlights the linkages and reciprocal restraints...
Tipo: Working or Discussion Paper
Palavras-chave: North China Plain; Property rights; Rural finance; Sustainable development; Financial Economics; Land Economics/Use.
Ano: 2006
URL: http://purl.umn.edu/9083

Land use and vegetation cover on native symbionts and interactions with cowpea
Provedor de dados: 91
Autores: Rocha,Beatriz C. F.; Santos,Enésia O. da S.; Santos,José G. D.; Takako,Adriana K.; Castro,Fabio J.
ABSTRACT Arbuscular mycorrhizal fungi and rhizobia are important components of agroecosystems and they respond to human interference. The objective of this study was to investigate native communities of those microorganisms in soil collected under the native forest, four pastures (Brachiaria brizantha, Panicum maximum, Arachis pintoi and Stylosanthes guianensis) and a fallow soil after maize cultivation, in interaction with cowpea (Vigna unguculata). The cowpea grew in a greenhouse until flowering. They were randomly distributed depending on soil, in five replications. The lowest mycorrhizal fungi sporulation and mycorrhizal root colonization occurred under the Panicum and forest soil. In the soils under forest and Stylosanthes, the cowpea did not exhibit...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arbuscular mycorrhiza; Rhizobia; Legal Amazon; Nodulation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000200116

Landcare on the Poverty-Protection Interface in an Asian Watershed
Provedor de dados: 7
Autores: Garrity, Dennis P; International Centre for Research in Agroforestry; D.Garrity@cgiar.org; Amoroso, Victor B; ;; Koffa, Samuel; ;; Catacutan, Delia; ;; Buenavista, Gladys; ;; Fay, Paul; ;; Dar, William; ;.
Serious methodological and policy hurdles constrain effective natural resource management that alleviates poverty while protecting environmental services in tropical watersheds. We review the development of an approach that integrates biodiversity conservation with agroforestry development through the active involvement of communities and their local governments near the Kitanglad Range Natural Park in the Manupali watershed, central Mindanao, the Philippines. Agroforestry innovations were developed to suit the biophysical and socioeconomic conditions of the buffer zone. These included practices for tree farming and conservation farming for annual cropping on slopes. Institutional innovations improved resource management, resulting in an effective social...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agroforestry; Biodiversity; Buffer zone; Integrated conservation-development projects; Land care; Protected national park; Soil conservation; Sustainable agriculture; Timber.
Ano: 2002

Land-Use and Land Cover Dynamics in South American Temperate Grasslands
Provedor de dados: 7
In the R&amp;#237;o de la Plata grasslands (RPG) biogeographical region of South America, agricultural activities have undergone important changes during the last 15&amp;#8211;18 years because of technological improvements and new national and international market conditions. We characterized changes in the landscape structure between 1985&amp;#8211;1989 and 2002&amp;#8211;2004 for eight pilot areas distributed across the main regional environmental gradients. These areas incorporated approximately 35% of the 7.5 &amp;#215; 105 km&amp;#178 of the system. Our approach involved the generation of land-use and land cover maps, the analysis of landscape metrics, and the computation of annual transition probabilities between land cover types. All of the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Campos; Fragmentation; Grasslands; Land use; Landscape dynamics  pampas; Remote sensing; Spatial metrics.
Ano: 2008

Langjährige Auswirkungen reduzierter Bodenbearbeitung auf unterschiedlichen Standorten
Provedor de dados: 21
Autores: Mäder, Paul; Berner, Alfred; Dierauer, Hansueli; Messmer, Monika.
Results on the applicability of reduced tillage systems are reported to be highly site dependent. To broaden our experience under organic farming, we performed a mid-term experiment comparing RT with conventional tillage (CT: plough) on a loamy clay in Frick (Switzerland). We found, that crop yield was reduced during the conversion period from conventional tillage (CT) to a RT system, but in the second experimental phase, RT exerted higher yields, resulting in a yield increase of 13% in mean. Soil organic matter in the 0 to 10 cm soil layer was 0,37 % higher under RT than under CT, without any difference in the 10 to 20 cm layer. In 2008 and 2009, we established two new experiments on loamy soils, comprising the factors tillage, fertilisation and maize...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil tillage.
Ano: 2011
URL: http://orgprints.org/17771/5/Maeder_17771.pdf

Langzeit-Systemvergleiche in Kenia und Indien: Konventionelle und biologische Erträge aus dem ersten Umstellungsjahr
Provedor de dados: 21
Autores: Zundel, C.; Musyoka, M.; Baruah, R.; Kilcher, L.; Muriuki, A.; Vanlauwe, B.; Chabi-Olaye, A.; Mucheru, M.; Mäder, P.
Organic agriculture is more and more perceived as a promising approach to increase food security in developing countries. However, only few attempts have been made so far to assess agronomic and economic performance of organic agriculture in these^regions in a systematic way. This article reports the first year’s results of two long-term  farming systems comparison field trials in Kenya and India. In sub-humid Central Kenya, on a high potential site in Meru South District (Chuka), there were no differences between yields of conventional and organic systems for the first maize and brassica crops. In contrast, organic yields were 14 to 60% lower than conventional yields on a trial site in a medium potential zone in Maragua District (Thika). It is assumed...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Biodiversity and ecosystem services.
Ano: 2009
URL: http://orgprints.org/14308/1/Zundel_14308.pdf

Lanthanum content and effects on growth, gas exchanges, and chlorophyll index in maize plants
Provedor de dados: 3
Autores: Duarte, Ana Carolina Oliveira; Oliveira, Cynthia de; Ramos, Sílvio Júnio; Castro, Evaristo Mauro de; Siqueira, José Oswaldo; Guilherme, Luiz Roberto Guimarães.
Rare earth elements, such as lanthanum (La), have been applied to agriculture via fertilizers, aiming to increase the productivity and crop quality, such results observed mainly in China. However, the knowledge about the effect of La on maize growth, as well as for other species, despite the growing interest it is still limited. The aim of this study was to evaluate the effects of La on maize growth, La content, photosynthetic rate and chlorophyll content in maize plants in response to La treatment (0, 25, 50, 100, 150, 300 and 600 μM) in nutrient solution for three weeks. The plants were placed in geminated pots using a split-root technique. One of the pots in the geminated set was filled with a complete nutrient solution without La, while another was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências Agrárias crops; Photosynthesis; Rare earth elements; Zea mays. Produção Vegetal.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/38469

Large scale demonstrations at Farm Suwan : I. Report on field operation
Provedor de dados: 106
Autores: Aschan Sukthumrong.
1 table
Palavras-chave: Corn; Maize; Sorghum; Planting; Demonstration plot; Field operation; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การปลูก; การเจริญเติบโต; ผลผลิต; แปลงสาธิต; การจัดการแปลงปลูกพืช.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3769

Large scale demonstrations at Farm Suwan : II. Report on cost and return
Provedor de dados: 106
Autores: Prem Boonruang; Kamphol Adulavidhaya.
3 tables
Palavras-chave: Corn; Maize; Sorghum; Production; Cost; Return; ข้าวโพด; ข้าวฟ่าง; การผลิต; ต้นทุน; ผลตอบแทน.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4658

Larval development of Spodoptera eridania (Cramer) fed on leaves of Bt maize expressing Cry1F and Cry1F + Cry1A.105 + Cry2Ab2 proteins and its non-Bt isoline
Provedor de dados: 92
Autores: Bortolotto,Orcial Ceolin; Bueno,Adeney de Freitas; Queiroz,Ana Paula de; Silva,Gabriela Vieira; Barbosa,Gustavo Caselato.
This study aimed to evaluate, in controlled laboratory conditions (temperature of 25±2 °C, relative humidity of 60±10%, and 14/10 h L/D photoperiod), the larval development of Spodoptera eridania (Cramer, 1784) (Lepidoptera, Noctuidae) fed with leaves of Bt maize expressing Cry1F and Cry1F + Cry1A.105 + Cry2Ab2 insecticide proteins and its non-Btisoline. Maize leaves triggered 100% of mortality on S. eridania larvae independently of being Bt or non-Bt plants. However, it was observed that in overall Bt maize (expressing a single or pyramided protein) slightly affects the larval development of S. eridania, even under reduced leaf consumption. Therefore, these results showed that Cry1F and Cry1F + Cry1A.105 + Cry2Ab2 can affect the larval development of S....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lepidopteran pest; Southwest armyworm; Transgenic corn; Non-target pest.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000100007

Las antocianinas del maíz : su distribución en la planta y producción.
Provedor de dados: 32
Autores: Mendoza Mendoza, Carmen Gabriela.
El presente estudio tuvo como objetivo conocer la dinámica de acumulación de antocianinas en la planta de maíz y en cada uno de sus órganos en el periodo comprendido entre 30 y 138 días después de la siembra (dds); así como valorar el potencial de las poblaciones de maíz pigmentado para acumular antocianinas, mediante la determinación de la concentración de antocianinas totales (AT) durante la etapa reproductiva del cultivo. El estudio de la dinámica de acumulación del pigmento indicó que en el maíz existe un patrón de acumulación de antocianinas bien definido (tanto en la planta como en los órganos que la conforman); la acumulación comenzó en los entrenudos y láminas foliares maduras en sentido acrópeto; visualmente fue más abundante (coloración morada...
Palavras-chave: Zea mays; Maíz pigmentado; Antocianinas totales; Dinámica de acumulación; Purple corn; Total anthocyanins; Dynamic of accumulation; Genética; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1709

Late rainy season planting of field corn, sweet corn , sorghum and pearl millet in upland Korat soils in northeast Thailand
Provedor de dados: 106
Autores: Finkner, Verne C.; Chaiwat Hong-Ngarm.
5 tables
Palavras-chave: Corn; Maize; Sweet corn; Sorghum; Pearl millet; Planting; Yields; Late rainy season; Upland; Korat soil; Northeast; Thailand; ข้าวโพด; ข้าวโพดหวาน; ข้าวฟ่าง; ข้าวฟ่างไข่มุก.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3816

Lead behavior in soil treated with contaminated sewage sludge and cultivated with maize
Provedor de dados: 52
Autores: Barriquelo,Marcilene Ferrari; Juliatti,Marinês Aparecida; Silva,Margarete Soares da; Lenzi,Ervim.
Lead (Pb) behavior was studied in soil treated twice with sewage sludge contaminated with lead at interval of 18 months. Soil samples received five different treatments: three with lead [0 (reference); 2,500; 5,000 mug g-1] and two with a mixture of lead and cadmium (interferer) (2,500 + 2,500 and 5,000 + 5,000 mug g-1, respectively). Vases containing treated soil were cultivated with maize in a greenhouse for 75 days. Pb was extracted using nitric perchloric digestion and analyzed by atomic absorption spectroscopy. The soil, containing sewage sludge contaminated by lead presented a higher concentration of Pb. The metal concentration remained constant in all treatments at 20-60 cm depth. No absorption of Pb by the plants was detected.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sewage sludge; Heavy metal; Lead; Environmental pollution.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400002

Leaf plasticity in successive selection cycles of 'Saracura' maize in response to periodic soil flooding
Provedor de dados: 86
Autores: Souza,Thiago Corrêa de; Magalhães,Paulo César; Pereira,Fabrício José; Castro,Evaristo Mauro de; Silva Junior,Jessé Marques da; Parentoni,Sidney Neto.
The objective of this work was to assess the effect of successive selection cycles on leaf plasticity of 'Saracura' maize BRS-4154 under periodical flooding in field conditions. Soil flooding started at the six-leaf stage with the application of a 20-cm depth water layer three times a week. At flowering, samples of leaves were collected and fixed. Paradermic and transverse sections were observed under photonic microscope. Several changes were observed throughout the selection cycles, such as modifications in the number and size of the stomata, higher amount of vascular bundles and the resulting decrease of the distance between them, smaller diameter of the metaxylem, decrease of cuticle and epidermis thickness, decrease of number and size of bulliform...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Hypoxia; Leaf anatomy; Tolerance to flooding.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000100003

Leaf relative chlorophyll content as an indicator parameter to predict nitrogen fertilization in maize
Provedor de dados: 65
Autores: Argenta,Gilber; Silva,Paulo Regis Ferreira da; Sangoi,Luis.
The development of a portable chlorophyll meter (SPAD 502), that takes instantaneous measurements of greenness without leaf destruction, has emerged as a new tool to assess plant N status. This trial was carried out to determine the adequate SPAD readings to predict maize nitrogen needs in four growth stages. The experiment was conducted in the state of Rio Grande do Sul, southern Brazil, during the 1998/99 growing season. Treatments were two maize hybrids (Pioneer 32R21 and Cargill 901) and nine side-dressed nitrogen levels (0, 50, 100, 150, 200, 300, 400, 500 and 600kg ha-1). Nitrogen was side-dressed at the soil surface in four equal doses, according to the levels established on each treatment. The first, second, third and fourth applications were made...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Portable chlorophyll meter; Adequate nitrogen level.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000500009

Leguminosen als Zwischenbegrünung im ökologischen Ackerbau mit konservierender Bodenbearbeitung
Provedor de dados: 21
Autores: Dorn, Brigitte; Jossi, Werner; van der Heijden, Marcel.
In large-plot field trials leguminous cover crops were examined under conservation tillage systems in organic farming conditions for their ability to suppress weeds. Cover crops were directly drilled after wheat harvest into the field. Suitability of cover crop was estimated by assessing their growth, soil coverage, biomass, biomass of weeds, mulch layer and yield of the main crop, which was either maize or sunflower. Fast growing cover crops, which had a high biomass, reduced weed growth most. Any cover crops grown reduced weed biomass significantly compared to the control without cover crop. Effects on the main crops will be determined after harvest in autumn 2010.
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2011
URL: http://orgprints.org/17405/3/Dorn_17405.pdf

Leistungsprüfung offen-abblühender Maispopulationen
Provedor de dados: 21
Autores: Eder, Barbara; Vollenweider, Carl; Buhmann, Kathrin; Spieß, Hartmut; Trautwein, Friedhilde; Vogt-Kaute, Werner; Ebert, Ulrich; Horneburg, Bernd; Völkle, Herbert; Rost, Stefanie.
Auf modernem Zuchtmaterial basierende, offen-abblühende Maispopulationen könnten vor allem für ökologische und Low-Input Anbausysteme eine alternative zu Hybriden darstellen. Im Rahmen des zeitlich befristeten Experiments 2014/150/EU der EU-Kommission wurden 2016 fünf moderne Maispopulationen vom Bundessortenamt zugelassen. In einem BÖLN-Projekt wurden in 2017 und 2018 Leistungsprüfungen aller zugelassenen Maispopulationen (mit Hybriden als Referenzsorten) unter konventionellen und  ökologischen Anbaubedingungen durchgeführt. Wir stellen die Ergebnisse dieser Leistungsprüfungen vor, ziehen Schlussfolgerungen über das agronomische Potential von Maispopulationen und diskutieren zukünftige Perspektiven.
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation Biodiversity and ecosystem services.
Ano: 2019
URL: http://orgprints.org/36175/1/Beitrag_248_final_a.pdf

Levantamento florístico de plantas daninhas em cultura de milho irrigado em Luís Eduardo Magalhães-BA.
Provedor de dados: 14
Autores: FONTES, J. R. A.; SHIRATSUCHI, L. S.; SILVA, R. R.
bitstream/CPAC-2009/25290/1/p2004_17.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Planta daninha; Cultura de grãos; Identification; Maize; Zero tillage.; Erva Daninha; Identificação; Levantamento; Milho; Plantio Direto; Zea Mays.; Grain crops; Weeds.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568289

Levantamento florístico de plantas daninhas em lavoura de milho cultivada no cerrado de Goiás.
Provedor de dados: 14
Autores: FONTES, J. R. A.; SHIRATSUCHI, L. S.
RESUMO: Neste trabalho, objetivou-se realizar um levantamento florístico e plantas daninhas em uma lavoura de milho cultivada na primavera-verão em sistema de plantio direto no Cerrado do Estado de Goiás, sendo empregado para isso o método de quadrado inventário. A área amostrada correspondeu a 107,5 ha e foi dividida em grade regular de 50 x 50 m, totalizando 430 pontos. Num raio de 5 m, ao redor de cada ponto, foi lançado aleatoriamente um quadrado de ferro de 50 cm de lado (0,25 metros quadrados), num total de quatro vezes. (1,0 metros quadrados). Os seguintes parâmetros foram calculados: frequência, frequência relativa, densidade, densidade relativa, abundância, abundância relativa e índice de valor de importância. Foram identificadas 23 espécies de...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Planta daninha; Manejo integrado; Identification; Maize; Zero tillage.; Erva Daninha; Identificação; Milho; Plantio Direto; Zea Mays.; Integrated weed management; Weeds.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/544627

Level of dominance in an adapted maize variety in relation to its future improvement
Provedor de dados: 106
Autores: Shehata, A.H.; Dhawan, N.L.; El-Demerdash, R.M.
3 tables
Palavras-chave: Corn; Maize; Dominance gene; Varieties; Maize improvement; Plant breeding; ข้าวโพด; ยีนเด่น; การปรับปรุงพันธุ์.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3899

Levels of nutrients and grain yield of maize intercropped with signalgrass (Brachiaria) in different arrangements of plants
Provedor de dados: 87
Autores: FREITAS,M.A.M.; VALADÃO SILVA,D.V.; SOUZA,M.F.; SILVA,A.A.; SARAIVA,D.T.; FREITAS,M.M.; CECON,P.R.; FERREIRA,L.R.
Competition between maize and signalgrass can economically cripple the intercropping by the reduced yield of maize and dry matter content of the forage. In seeking to define plant arrangements which make this system more efficient, this research was held with the objective of assessing the effects of interference of densities of signalgrass (Urochloa Brizantha) on nutrition and on maize grain yield. Two field experiments were conducted in a randomized block design with four replications. Treatments were arranged similarly in both experiments, in a 2 x 4 factorial design, the first factor being the dose of Nicosulfuron herbicide applied (0 and 8 g ha-1) and the second factor being the forage seeding rates (0, 2, 4 and 6 kg of seeds per hectare). The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nicosulfuron; Competition in intercropping; Cropping spacing.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000100049

Liberalization of Staple Crops: Lessons from the Mexican Experience in Maize
Provedor de dados: 31
Autores: Yunez-Naude,   Antonio; Serrano-Cote,   Valeria.
In this paper we inquire why after more than 25 years of domestic agricultural reforms in Mexico and 15 years of trade liberalization of maize under NAFTA –a non-competitive crop and the major staple in Mexico–domestic production of this field crop has increased. We present new empirical evidence showing that, as expected, maize prices in Mexico dropped until 2006 and have experienced a process of convergence with USA prices, and maize imports from the USA increased. However, despite lower prices, maize production in Mexico rose and has experienced a positive structural change since 1992, two years before the beginning of NAFTA’s implementation. Based on the heterogeneity of maize production in Mexico, three possible explanations are proposed to explain...
Tipo: Conference Paper or Presentation
Palavras-chave: Domestic and Trade Liberalization; Price Convergence; Structural Change.; Agricultural and Food Policy; Food Security and Poverty; International Relations/Trade; Political Economy.
Ano: 2009
URL: http://purl.umn.edu/50827

Light interception, leaf area and biomass production as a function of the density of maize plants analyzed using mathematical models
Provedor de dados: 1
Autores: Portes, Tomás Aquino; Melo, Hyrandir Cabral de.
Mathematical models were tested to correlate the leaf area index (LAI) of maize to the percentage of light intercepted by the canopy (% LIC) and this with the total dry matter of aerial parts (TDM), as well with the grain yield (GY). The experiment was conducted in a randomized block design, with four replications. The treatments consisted of hybrid maize at five plant densities: 4.0, 2.66, 2.0, 1.6, and 1.3 plants per m2 (pl m-2). At densities of 4.0 and 2.66 pl m-2, the average LAI and TDM did not differ among themselves but were significantly higher than those presented at the densities of 2.0, 1.66 and 1.3 pl m-2, which also did not differ among themselves. The number of corncobs per plant (cob pl-1) and GY behaved similarly. The LAI grew exponentially...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências Agrárias  Fisiologia de Plantas Cultivadas age; Corn; Radiation; Yield Fisiologia de Plantas Cultivadas.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17892

Lime and phosphate effects on atrazine sorption, leaching and runoff in soil
Provedor de dados: 64
Autores: Lima,José Maria de; Aquino,Regimeire Freitas; Magalhães,Ciro Augusto de Souza; Gonçalves,Raissa Homem; Nóbrega,Júlio Cesar Azevedo; Mello,Carlos Rogério.
ABSTRACT Atrazine still is a widely used herbicide in tropical soils to control annual broad-leaved weeds and annual grasses mainly in maize and sorghum plantations. Sorption and desorption in such soils are important processes that affect transport, ending with soil and water contamination, not only in these soils, but in other soils around the world. Lime and phosphate are important amendments in tropical soils to mitigate low fertility. These treatments can affect interaction among soil particles and between soil and atrazine. The objectives here were to evaluate the effect of lime, phosphate, and lime + phosphate treatments on sorption and transport of atrazine in a Typic Hapludult, using soil-erosion-plots at field conditions in a 3%-slope landscape...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Contamination; Pesticide; Argisol; Soil erosion plots.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100204

L’IMPACT DU CAPITAL HUMAIN SUR LA PRODUCTIVITE AGRICOLE AU BURKINA FASO
Provedor de dados: 31
Autores: Theophile,   Kabore.
Contributed Paper presented at the International Conference on Agriculture Of Ouagadougou (BURKINA FASO), December 4-6, 2010.
Tipo: Conference Paper or Presentation
Palavras-chave: Capital humain; Rendements; Productivité; Parcelle; Matching; Human capital; Productivity; Farm; Matching; Labor and Human Capital; Productivity Analysis; E24; N54; Q12.
Ano: 2010
URL: http://purl.umn.edu/102275

Lines collection and agronomic trial comparisons of waxy (Tien) and glutinous maize cultivars of Thailand
Provedor de dados: 106
Autores: Suranee Thongluang; Yupapan Chuthathong.
Palavras-chave: Corn; Maize; Waxy corn; Glutinous maize; Line collection; Breeding; ข้าวโพด; ข้าวโพดเทียน; ข้าวโพดข้าวเหนียว; การปรับปรุงพันธุ์; การรวบรวมพันธุ์; ลักษณะพันธุ์.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4282

Lines collection and agronomic trial comparisons of waxy (TIEN) and glutinous maize cultivars of Thailand
Provedor de dados: 106
Autores: Suranee Thongluang; Yupapan Chuthathong.
3 tables
Palavras-chave: Corn; Maize; Waxy corn; Line collection; Breeding; ข้าวโพดเทียน; ข้าวโพดข้าวเหนียว; การปรับปรุงพันธุ์; การรวบรวมพันธุ์; ลักษณะพันธุ์.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4326

Linhagens-elites de milho introgredidas com a resistência ao mosaico-comum.
Provedor de dados: 14
Autores: SOUZA, I. R. P. de; PINTO, M. de O.; GUIMARAES, P. E. de O.; GUIMARAES, L. J. M.; TRINDADE, R. dos S.
RESUMO - No Brasil, a virose Mosaico-Comum, que afeta o milho, é causada pela espécie de potyvirus Sugarcane mosaic virus (SCMV). Os danos ocasionados por essa virose serão maiores quanto mais cedo a infecção se estabelecer, podendo atingir perdas consideráveis na produção em genótipos suscetíveis. Para um controle eficiente da doença, fazem-se necessários o desenvolvimento e a utilização de cultivares resistentes. O objetivo do presente trabalho foi a introgressão da resistência ao Mosaico-Comum em duas Linhagens-Elites de milho suscetíveis, 5100290-11, grupo heterótico Flint (F), e 5702955, grupo heterótico Dent (D), empregando, como fonte de resistência, linhagens dos respectivos grupos heteróticos. No processo de introgressão da resistência, os...
Tipo: Folhetos
Palavras-chave: Zea Mays; Doença de Planta; Vírus; Melhoramento Vegetal; Retrocruzamento; Marcador Molecular; Potyvirus; Sugarcane mosaic virus.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1149766

Linhagens-elites de milho introgredidas com a resistência ao mosaico-comum em milho.
Provedor de dados: 14
Autores: SOUZA, I. R. P. de; PINTO, M. de O.; GUIMARAES, P. E. de O.; GUIMARAES, L. J. M.; TRINDADE, R. dos S.
RESUMO - No Brasil, a virose Mosaico-Comum, que afeta o milho, é causada pela espécie de potyvirus Sugarcane mosaic virus (SCMV). Os danos ocasionados por essa virose serão maiores quanto mais cedo a infecção se estabelecer, podendo atingir perdas consideráveis na produção em genótipos suscetíveis. Para um controle eficiente da doença, fazem-se necessários o desenvolvimento e a utilização de cultivares resistentes. O objetivo do presente trabalho foi a introgressão da resistência ao Mosaico-Comum em duas Linhagens-Elites de milho suscetíveis, 5100290-11, grupo heterótico Flint (F), e 5702955, grupo heterótico Dent (D), empregando, como fonte de resistência, linhagens dos respectivos grupos heteróticos. No processo de introgressão da resistência, os...
Tipo: Folhetos
Palavras-chave: Zea Mays; Doença de Planta; Melhoramento Vegetal; Retrocruzamento; Marcador Molecular; Potyvirus; Sugarcane mosaic virus.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1149576

Linking Farmers to Markets through Modern Information and Communication Technologies in Kenya
Provedor de dados: 31
Autores: Mukhebi,   A.W.; Kundu,   J.; Okolla,   A.; Wambua,   M.; Ochieng,   W.; Fwamba,   G.
This paper highlights a market information and linkage system (MILS) developed and tested by the Kenya Agricultural Commodity Exchange Limited (KACE) that increases the efficiency of agricultural markets to work better for smallholder farmers and other small and medium sized agro-enterprises (SMEs). The MILS involves harnessing modern information and communication technologies (ICTs) to empower farmers with low-cost reliable and timely market information to enhance the bargaining power of the farmer for a better price in the market place, and to link the farmer to markets more efficiently and profitably. The components of the KACE MILS are (www.kacekenya.com): Rural based Market Information Points (MIPs) which are information kiosks located in rural...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Agricultural and Food Policy; Consumer/Household Economics; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Institutional and Behavioral Economics; International Relations/Trade; Land Economics/Use; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/51988

Linking Global and Local Approaches to Agricultural Technology Development: The Role of Participatory Plant Breeding Research in the CGIAR
Provedor de dados: 31
Autores: Bellon,   Mauricio R.; Morris,   Michael L.
Tipo: Working or Discussion Paper
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2002
URL: http://purl.umn.edu/46550

Livelihood Strategies of Resource-Poor Farmers in Striga-Infested Areas of Western Kenya.
Provedor de dados: 31
Autores: Manyong,   Victor M.; Alene,   Arega D.; Odhiambo,   George D.; Mignouna,   H.D.; Bokanga,   M.; Omanya,   G.; Nindi,   S.J.
Striga hermonthica (del) Benth is threatening rural livelihoods in western Kenya where maize is the major food and cash crop. Vulnerability analysis was conducted on a sample of 802 households in eight districts of Nyanza and Western provinces. Farmers perceived Striga as the major cause of poverty and food insecurity. Both household income and child nutrition indicators showed alarming conditions for the majority of households. The coping strategies and informal safety nets were not capable of addressing the vulnerability issue successfully. A logistic regression model of determinants of poverty was estimated to examine the determinants and correlates of poverty. Results revealed certain characteristics of households that were more likely to be poor: poor...
Tipo: Conference Paper or Presentation
Palavras-chave: Livelihoods; Maize; Kenya; Striga; Logit; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy; Land Economics/Use; Marketing; Productivity Analysis; Research and Development/Tech Change/Emerging Technologies.
Ano: 2008
URL: http://purl.umn.edu/52195

Local and Regional Food Aid Procurement in Zambia
Provedor de dados: 31
Autores: Haggblade,   Steven; Tschirley,   David L.
By law, US food aid relies on commodity procurement in the US. A powerful political coalition of US farm groups, shippers and relief agencies vigorously supports these in-kind food aid donation. As an alternative, local procurement of food aid, in Africa, has attracted growing interest because of its potential to reduce landed costs and speed delivery times. For this reason, many food aid donors, other than the US, have switched to local and regional procurement of food aid commodities. This paper reviews experience with local and regional food aid procurement in Zambia. The study focuses primarily on experience of the World Food Programme (WFP), the agency with the most extensive experience conducting local and regional procurement in Africa. WFP’s...
Tipo: Report
Palavras-chave: Food security; Policy; Zambia; Africa; Food aid; Crop Production/Industries; Q18.
Ano: 2007
URL: http://purl.umn.edu/54487

Local Impacts of a Global Crisis - Food Price Transmission and Poverty Impacts in Ghana
Provedor de dados: 31
Autores: Cudjoe,   Godsway; Breisinger,   Clemens; Diao,   Xinshen.
This paper takes a local perspective on global food price shocks by analyzing food price transmission between regional markets in Ghana. It also assesses the impacts of food price increases on various household groups. Taking the recent global food crisis as an example, we find that prices for domestic staples are highly correlated with prices for imported rice. However, price transmission between pairs of domestic regional markets is limited; it is complete for local rice and maize only when more rigorous cointegration analysis is applied. Our findings also show the important role of seasonality in the determination of market integration and price transmission. The welfare effect for households as consumers appears relatively modest at the aggregate...
Tipo: Conference Paper or Presentation
Palavras-chave: Crisis; Price transmission; Cointegration analysis; Household model; Ghana; Food Security and Poverty; International Development; Q13; R20.
Ano: 2009
URL: http://purl.umn.edu/51089

Locust and grasshopper control by cropping systems
Provedor de dados: 106
Autores: Samuth Mongkolkiti.
Palavras-chave: Corn; Maize; Patanga; Locust; Grasshopper; Patanga succincta; Cropping systems; Agroecosystem; Insect control; ข้าวโพด; ตั๊กแตนปาทังก้า; ระบบการปลูกพืช; ระบบนิเวศเกษตร.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3968

Long term effect of organic sources of nutrients on productivity and soil health in maize+soybean—wheat+gram cropping system
Provedor de dados: 21
Autores: Jiwan Prakash Saini, J.P. Saini; Rameshwar Kumar, Rameshwar.
Organic farming has emerged as an important priority area globally in view of growing demand for safe and healthy food which provides health and environmental benefits. The long term sustainability and concerns on environmental pollution associated with indiscriminate use of agrochemicals calls for use of organic farming practices in agriculture for maintaining soil health and crop productivity. Over the past few decades, increasing attention has been given to intercropping particularly in organic agricultural systems and the evidence suggests that this can provide production advantages over sole crops in the absence of increased external inputs due to more efficient utilization of resources. Component crops in intercropping may differ in their use of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring.
Ano: 2014
URL: http://orgprints.org/23210/1/23210%20Paper%20FINAL%20ISOFAR-Feb.2014%20Istanbul_MM.pdf

Long term effects of cover crops on weeds in Mediterranean low input arable management systems
Provedor de dados: 21
Autores: Carlesi, Stefano; Antichi, Daniele; Bigongiali, Federica; Mazzoncini, Marco; Barberi, Paolo.
The introduction of cover crops (CC) in crop rotations is a key tool to control weed and ameliorate soil conditions in low input arable systems. In 1992 a long term experiment (LTE) was set up at Centre for Agri-environmental Research “E. Avanzi (CIRAA), University of Pisa to determine the combined effect of tillage intensity, nitrogen fertilization levels and CC types on soil quality, crop yield and weed communities.     The LTE is based on 4-year crop rotation (maize, durum wheat, sunflower, durum wheat) with cover crops grown twice, in between wheat and summer crops. Two tillage systems were compared: i) a conventional system (CS), with annual ploughing (30 cm depth); ii) a low input system (LIS), with chiseling (30 cm depth) for summer crops and no...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Soil tillage; Biodiversity and ecosystem services; Weed management; Farm nutrient management.
Ano: 2015
URL: http://orgprints.org/29700/1/carlesi%20et%20a.2015.pdf

Longer crop cycle lengths could offset the negative effects of climate change on Brazilian maize
Provedor de dados: 53
Autores: Souza,Tamires Teles de; Antolin,Luís Alberto Silva; Bianchini,Vitor de Jesus Martins; Pereira,Rodolfo Armando de Almeida; Silva,Evandro Henrique Figueiredo Moura; Marin,Fábio Ricardo.
ABSTRACT Maize (Zea mays) is considered one of the most important crops for world food security. Globally, Brazil is the second largest maize producer and the fourth largest maize consumer. The climate variables is one of the main determining factors for crop yield. Given the possibility of future climate changes, our objective was to evaluate the impact of climate change on maize crop growth and development, assessed strategies to cope with the future crop andto quantify the impacts on various producing regions of Brazil. The DSSAT/CERES-Maize model was calibrated with field data and then used to simulate current and six future climate scenarios, according to the AgMIP protocols. We selected three regional climate circulation models (GCMs) and two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop modelling; Food security; Adaptation; Zea mays.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400622

Long-Run Relationship of U.S. and Argentine Maize Prices
Provedor de dados: 31
Autores: Ghoshray,   Atanu.
This paper examines the relationship between the maize export prices of the United States and Argentina. The results suggest an asymmetric nature of price adjustment. This could be due to the fact that the maize market is characterized by significant concentration. The larger market share of exports by the United States reflects the influences on export price dynamics. The structure of maize trade is such that U.S. markets are largely insulated from influences flowing from Argentina, while Argentine maize prices are not insulated from U.S. influences.
Tipo: Journal Article
Palavras-chave: Cointegration; Maize; Price dynamics; Threshold adjustment; Demand and Price Analysis; International Relations/Trade.
Ano: 2006
URL: http://purl.umn.edu/57701

Long-term Benefits of GM crops: Potential for Diabrotica Suppression in Europe using Bt Maize
Provedor de dados: 17
Autores: Nicholas P. Storer; Peter Schlotter; Kevin L. Steffey.
Transgenic crops producing insecticidal proteins from _Bacillus thuringiensis_ (Bt) have been widely adopted since 1996 in the United States of America to combat important pests of maize and cotton. There is growing evidence that several target pest populations have been dramatically reduced in areas where the Bt crops have been most intensively adopted over multiple years. The evidence is most dramatic for nonmigratory monophagous and oligophagous species that show high mortality on Bt crops, such as European corn borer (_Ostrinia nubilalis_), and tobacco budworm (_Heliothis virescens_). Bt cotton is currently being used in the southwestern USA as part of an area-wide eradication program for pink bollworm (_Pectinophora gossypiella_). Single, stacked, and...
Tipo: Poster
Palavras-chave: Biotechnology; Plant Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4447/version/1

Long-term C-CO2 emissions and carbon crop residue mineralization in an oxisol under different tillage and crop rotation systems
Provedor de dados: 90
Autores: Campos,Ben-Hur Costa de; Amado,Telmo Jorge Carneiro; Tornquist,Carlos Gustavo; Nicoloso,Rodrigo da Silveira; Fiorin,Jackson Ernani.
Soil C-CO2 emissions are sensitive indicators of management system impacts on soil organic matter (SOM). The main soil C-CO2 sources at the soil-plant interface are the decomposition of crop residues, SOM turnover, and respiration of roots and soil biota. The objectives of this study were to evaluate the impacts of tillage and cropping systems on long-term soil C-CO2 emissions and their relationship with carbon (C) mineralization of crop residues. A long-term experiment was conducted in a Red Oxisol in Cruz Alta, RS, Brazil, with subtropical climate Cfa (Köppen classification), mean annual precipitation of 1,774 mm and mean annual temperature of 19.2 ºC. Treatments consisted of two tillage systems: (a) conventional tillage (CT) and (b) no tillage (NT) in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Management systems; No tillage; Conventional tillage; Greenhouse gases.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300017

Long-term effect of mulching with fertilizer under corn-legumes cropping on crop yield and improvement of soil chemical and physical properties
Provedor de dados: 106
Autores: Samnao Phetchawee; Nonglak Vibulsukh; Maleewon Theppoolpon; Withaya Marsangsan.
2 ill., 7 tables
Palavras-chave: Corn; Maize; Fertilizer; Mulching; Corn-legume cropping system; Yields; Soil chemical properties; Soil physical property; Long-term effect; ข้าวโพด; ปุ๋ย; การใช้วัสดุคลุมดิน; ระบบการปลูกพืช; พืชตระกูลถั่ว; ผลผลิต; คุณภาพทางฟิสิกส์ของดิน; คุณสมบัติทางเคมีของดิน.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4600

Long-term performance of organic crop rotations in the tropics: First results from a high and a medium potential site in sub-humid Central Kenya
Provedor de dados: 21
Autores: Zundel, Christine; Schneider, Monika; Musyoka, Martha; Muriuki, Anne; Vanlauwe, Bernard; Mucheru-Muna, Monica; Chabi-Olaye, Adenirin; Niggli, Urs.
Organic Agriculture is perceived by many stakeholders as a promising approach to increase food security in developing countries. However, only few attempts have been made so far to assess agronomic and economic performance of Organic Agriculture in these regions in a systematic way. The Research Institute of Organic Agriculture (FiBL), together with its partners, is presently establishing long-term comparisons of farming systems in various agro-ecological and socio-economic contexts to study the different parameters that are essential for sustainable development. To date, three study areas have been selected: (a) a sub-humid area in Kenya where farming is subsistence-oriented; (b) a semi-arid area in India where cotton is produced for the export market;...
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions.
Ano: 2009
URL: http://orgprints.org/18373/1/Zundel-etal-2009-african-organic-conference.pdf

Long-term study on fertilizer use for young ear corn
Provedor de dados: 106
Autores: Ring Meesawat; Pradit Boonampol; Chantira Ariyathaj; Santi Teeraporn; Garun Chitwichote; Grit Rattanaphatoom.
19 ill., 3 tables
Palavras-chave: Corn; Maize; Young ear corn; Fertilizer use; Yields; Long-term study; ข้าวโพด; ข้าวโพดฝักอ่อน; การใช้ปุ๋ย; ระยะยาว.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4357

Long-term study on the effect of soil and irrigation management for annually continuous young ear corn growing in upland soil (1st year)
Provedor de dados: 106
Autores: Uthai Arromratana; Boonlert Kan-taulis; Anan Tongpou; Soonthorn Sangsila; Chusak Malichaishi.
6 tables
Palavras-chave: Corn; Maize; Young ear corn; Irrigation; Yields; Long-term study; ข้าวโพด; ข้าวโพดฝักอ่อน; การจัดการดินและน้ำ; พื้นที่ดอน.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4358

Loss of ammonia from nitrogen fertilizers applied to maize and soybean straw
Provedor de dados: 90
Autores: Faria,Letícia de Abreu; Nascimento,Carlos Antonio Costa do; Vitti,Godofredo Cesar; Luz,Pedro Henrique de Cerqueira; Guedes,Elaine Maria Silva.
In Brazilian agriculture, urea is the most commonly used nitrogen (N) source, in spite of having the disadvantage of losing considerable amounts of N by ammonia-N volatilization. The objectives of this study were to evaluate: N lossby ammonia volatilization from: [urea coated with copper sulfate and boric acid], [urea coated with zeolite], [urea+ammonium sulfate], [urea coated with copper sulfate and boric acid+ammonium sulfate], [common urea] and [ammonium nitrate]; and the effect of these N source son the maize yield in terms of amount and quality. The treatments were applied to the surface of a soil under no-tillage maize, in two growing seasons. The first season (2009/2010) was after a maize crop (maize straw left on the soil surface) and the second...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Boric acid; Copper sulfate; Coated urea; Volatilization; Zeolite.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400014

Lysine catabolism: flow, metabolic role and regulation
Provedor de dados: 61
Autores: Fornazier,Ricardo Francisco; Azevedo,Ricardo Antunes; Ferreira,Renato Rodrigues; Varisi,Vanderlei Aparecido.
Lysine is an essential amino acid, synthesized in plants in the aspartic acid pathway. The lysine catabolism is performed by the action of two consecutive enzymes, lysine 2-oxoglutarate reductase (LOR) and saccharopine dehydrogenase (SDH). The steady state of lysine is controlled by both, synthesis and catabolism rates, with the final soluble lysine concentration in cereal seeds a direct result of these processes. In the last 40 years, the enzymes involved in lysine biosynthesis have been purified and characterized from some plant species such as carrot, maize, barley, rice, and coix. Recent reports have revealed that lysine degradation might be related to various physiological processes, for instance growth, development and response to environmental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Lysine; Metabolism; Mutants.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000100002

Lysine metabolism and amino acid profile in maize grains from plants subjected to cadmium exposure
Provedor de dados: 63
Autores: Kato,Fabiana Hibary; Carvalho,Marcia Eugenia Amaral; Gaziola,Salete Aparecida; Piotto,Fernando Angelo; Azevedo,Ricardo Antunes.
ABSTRACT: In general, the effects of Cadmium (Cd) on crop quality are evaluated solely by Cd accumulation in the edible plant parts; thus, the potential effects on several nutritional features are not often taken into account. This study evaluated Cd effects on the enzymatic activities of lysine (Lys) metabolism, storage protein and amino acid profile in maize. Stress parameters were also assessed. In vegetative organs, Cd was accumulated in the following decreasing order: roots &gt; stems &gt; leaves. Cadmium accumulation in grains decreased at grain maturity (from 0.25 to 0.07 µg g−1 DW). In leaves, neither hydrogen peroxide content nor superoxide dismutase, catalase, ascorbate peroxide and guaiacol peroxidase activities did not change in Cd-treated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Aspartate kinase; Corn; Dihydrodipicolinate synthase; Heavy metal.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101300

MACROECONOMIC AND AGRCULTURAL REFORMS IN ZIMBABWE: POLICY COMPLEMENTARITIES TOWARD EQUITABLE GROWTH
Provedor de dados: 31
Autores: Bautista,   Romeo M.; Thomas,   Marcelle.
Using a CGE (computable general equilibrium) model for Zimbabwe with 1991 as base period, this paper examines quantitatively the income and equity effects of macroeconomic reform measures in isolation and in conjunction with potentially complementary changes in agricultural sector policies. Some important features of the CGE model are an explicit focus on agriculture, distinction among various rural and urban household groups, and detailed specification of factor markets. Specific aspects of economic policy existing in the pre-reform benchmark year are taken into account in the base model, such as the administered setting of the foreign exchange rate, quantitative import restrictions, and government-determined maize prices for domestic producers and grain...
Tipo: Working or Discussion Paper
Palavras-chave: International Development.
Ano: 2000
URL: http://purl.umn.edu/16313

Macro-Micro Linkages and Rural Livelihood Improvements in Africa
Provedor de dados: 31
Autores: Mapila,   Mariam A.T.J.; Kirsten,   Johann F.; Meyer,   Ferdinand H.
This study develops a multi-equation partial equilibrium model of the Malawi maize market which is linked sequentially to a local maize economy to show that the skepticism surrounding the use of innovation systems in agricultural research in Africa is not unfounded.  The results demonstrate that participating households have the potential to be negatively affected by greater linkages with the market given policy shocks. Therefore in order for the innovation systems perspective in agricultural research to be effective in sustaining robust livelihoods in Africa and to ensure sustainable utilization of natural resources; interventions must be implemented only after systematic analysis of the potential consequences of the resultant macro-micro linkages; thus...
Tipo: Presentation
Palavras-chave: Agricultural policy modeling; Agricultural Innovation Systems; Macro-micro approach; Agricultural and Food Policy.
Ano: 2012
URL: http://purl.umn.edu/123641

Macronutrient and sodium content in maize plants under cassava wastewater fertilization
Provedor de dados: 91
Autores: Magalhães,Adriana G.; Rolim,Mario M.; Duarte,Anamaria de S.; Silva,Gerônimo F. da; Bezerra Neto,Egídio; Pedrosa,Elvira M. R.
ABSTRACT This study aimed to evaluate the content of macronutrients and sodium in corn ( Zea mays) plants as a function of different doses of cassava wastewater and ages of the plants after emergence. The experiment was conducted in a greenhouse in pots with capacity for 25 dm3 of soil, using a 5 × 3 factorial design with four replicates. The studied factors were doses of cassava wastewater: 0; 12.6; 25.2; 50.4; 75.6 m3 ha-1, and plant age: 20, 40 and 52 days after emergence (DAE). Potassium, calcium, magnesium, nitrogen, phosphorus, sodium and sulfur contents were evaluated in leaves and stalks. Nutritional deficiency of calcium was visible at 20 DAE. The increment in cassava wastewater doses increased N, P and K contents in plant shoots, but decreased Ca...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Residue reuse; Mineral nutrition.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000300215

Mais und Bohnen im Gemenge
Provedor de dados: 21
Autores: Fischer, Jenny; Böhm, Herwart.
Zwei, die sich wunderbar ergänzen: Mais und Bohne. Ob sich der Anbau im Gemenge lohnt und wie sich die Silage beider Partner als Tierfutter einsetzen lässt, ist Gegenstand eines seit 2014 geförderten BÖLN-Verbundprojekts.  Vor dem Hintergrund, dass Bio-Tiere künftig  verstärkt mit betrieblich oder regional erzeugten Futtermitteln versorgt werden sollen, könnte der Mais-Bohnen-Gemengeanbau auch für die ökologische Landwirtschaft einige Vorteile bieten. Denn einerseits ist der Silomais aufgrund seiner hohen Energiedichte und guten Silierfähigkeit ein wichtiges Grundfuttermittel, enthält aber andererseits nur wenig Protein, das deshalb durch eiweißreiche Futterkomponenten ergänzt werden muss. Indem man Mais und Bohnen gemeinsam anbaut, kann man ein...
Tipo: Newspaper or magazine article
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Root crops.
Ano: 2015
URL: http://orgprints.org/29320/1/Fischer-B%C3%B6hm_2015_Bioland_Mais-Bohne.pdf

Maisanbau auf suboptimalen Standorten - Einfluss variierter Reihenweiten und Auswirkungen einer Dammkultur auf die Ertrags- und Qualitätsleistungen des Maises bei gleichzeitig variierter Beikrautregulierung
Provedor de dados: 21
Autores: Mücke, Markus; Meyercordt, Armin.
Zur Entwicklung geeigneter Anbau- und Beikrautregulierungsstrategien im Ökologischen Maisanbau auf Flussmarsch-Standorten sind drei verschiedene Anbauverfahren im Zeitraum von 2004 bis 2006 geprüft worden. Neben der Standard-Variante mit 75 cm Reihenabstand wurde eine Engsaat-Variante mit 37,5 cm und eine Dammkultur-Variante mit 75 cm Reihenabstand miteinander verglichen. Zur Beikrautregulierung kamen Standardgeräte wie Striegel, Schar- und Rollhacke sowie ein praxisübliches Häufelgerät aus dem Kartoffelanbau zum Einsatz.   Im ersten Versuchsjahr 2004 wurde mit der Dammkultur neben einem deutlich verbesserten Pflanzenwachstum auch ein beachtlicher Mehrertrag von 30 % erzielt. Die Engsaat lag im Ertrag immerhin um 10 % über dem Standardanbauverfahren. In...
Tipo: Report
Palavras-chave: Weed management; Root crops.
Ano: 2006
URL: http://orgprints.org/13088/1/13088%2D03OE037%2Dlawikhan%2Dmuecke%2D2006%2Dmaisanbau.pdf

Maiserträge und Humusbilanzen in ökologischen Energiepflanzen-Fruchtfolgen mit Gärrestdüngung
Provedor de dados: 21
Autores: Levin, Karin; Simon, A.; Reents, Hans Jürgen; Hülsbergen, Kurt-Jürgen.
The long-term effects of biogas production in organic farming on soil fertility due to changes in crop rotations and the removal of carbon from these systems are, at  present, unclear. Data from a long-term field trial in Bavaria, Germany were used to evaluate the effects of different crop rotations and fertilization with biogas digestate on maize yields and humus balances. Digestate fertilization led to higher maize yields compared with an unfertilized control. Maize yields were lower when the maize was sown directly into a white clover cover crop. Humus balances show the importance of considering both the return of organic matter via fertilization and crop rotation design  to ensure that soil fertility is not depleted
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Nutrient turnover; Farm nutrient management; Root crops.
Ano: 2017
URL: http://orgprints.org/31554/1/Maisertr%C3%A4ge%20und%20Humusbilanzen%20in%20%C3%B6kologischen.pdf

Mais-Stangenbohnen-Silage als Futtermittel für Milchkühe und  Mastschweine
Provedor de dados: 21
Autores: Kälber, Tasja; Aulrich, Karen; Barth, Kerstin; Böhm, Herwart; Bussemas, Ralf; Fischer, Jenny; Höinghaus, Kathrin; Weißmann, Friedrich.
In organic farming, appropriate protein feeding is challenging based on regional or farm-grown resources. Therefore, feeding maize-bean-silage to dairy cows and  fattening pigs could be a viable option to increase the protein content in the diet. However, anti-nutritional compounds might impair animal performance. When exchanging maize silage with maize-bean-silage in the diet of dairy cows, no detrimental effects could be detected. Similarly, the on-top feeding of maize-beansilage to pigs revealed no differences in regard to animal performance compared to a  grass-clover diet. Thus, the inclusion of a certain amount of maize-bean-silage in the diet of dairy cows and fattening pigs had no negative effects on the animals. Further studies are going to...
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle Cereals; Pulses and oilseeds Feeding and growth Pigs Root crops.
Ano: 2017
URL: http://orgprints.org/31841/1/Mais-Stangenbohnen-Silage%20als%20Futtermittel%20f%C3%BCr%20Milchk%C3%BChe.pdf

Mais-Stangenbohnen-Silage in der Milchviehfütterung: Akzeptanz und Auswirkungen auf die Leistung
Provedor de dados: 21
Autores: Kälber, Tasja; Aulrich, Karen; Barth, Kerstin.
Mais ist ein wichtiges Futtermittel für Milchkühe, weist jedoch einen eher niedrigen Proteingehalt auf. Durch den Gemischtanbau mit Stangenbohnen könnte der Proteingehalt gesteigert werden. Allerdings enthalten Bohnen antinutritive Stoffe, die bei Verfütterung im rohen Zustand die tiereische Leistung beeinflussen können. In unserer Studie konnten wir keine negativen Effekte durch die Substitution von Maissilage mit Mais-Bohnen-Silage erkennen.
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2019
URL: http://orgprints.org/36072/1/Beitrag_141_final_a.pdf

Maïsteelt en  mestscheiding: Langetermijneffecten op organische stof
Provedor de dados: 21
Autores: Deru, Joachim; van der Burgt, Geert-Jan; van Eekeren, Nick; Wientjes, Harm.
Een groep veehouders uit de Brabantse Kempen onderzoekt het gebruik van de dunne fractie en mineralen-concentraat in gras en maïs. Dit gebeurt in het project ‘Fosfaat: de bodem als bron’ onder leiding van CLM, DLV en Louis Bolk Instituut. Doel van de veehouders is om uiteindelijk in eigen beheer mest te gaan scheiden. Binnen het project is het effect van het gebruik van dunne fractie en mineralenconcentraat op de organische stof bij maïsteelt onderzocht met het model NDICEA.
Tipo: Newspaper or magazine article
Palavras-chave: Composting and manuring.
Ano: 2010
URL: http://orgprints.org/18144/1/2412_.pdf

Maize and beans – Organic roughage with benefits?
Provedor de dados: 21
Autores: Böhm, Herwart.
The tool shows that it is possible to grow maize and beans together to produce a high-protein feedstuff. The German video demonstrates relay planting, manual harvesting and processing of the product.
Tipo: Practice tool
Palavras-chave: Feeding and growth Processing; Packaging and transportation Pigs.
Ano: 2016
URL: http://orgprints.org/36544/1/index.html

Maize and sorghum foundation seed production of the Department of Agriculture
Provedor de dados: 106
Autores: Amnat Chinchet; Werawat Nilrattanakoon.
3 tables
Palavras-chave: Corn; Maize; Sorghum; Seed production; Foundation seed; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; เมล็ดพันธุ์หลัก.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4510

Maize and soybeans production in integrated system under no-tillage with different pasture combinations and animal categories
Provedor de dados: 124
Autores: Silva,Hernani Alves da; Moraes,Anibal de; Carvalho,Paulo César de Faccio; Fonseca,Adriel Ferreira da; Dias,Carlos Tadeu dos Santos.
The adoption of no-till system (NTS) combined with crop-livestock integration (CLI) has been a strategy promoted in Brazil, aiming to maximize areas yield and increase agribusiness profitability. This study aimed to evaluate grains yield and phytotechnical attributes from maize and soybean culture by CLI system under NTS after winter annual pure and diversified pastures with the absence or presence of grazing animals. The experiment was installed in Castro (Paraná State, Brazil) on in a dystrophic Humic Rhodic Hapludox with a clay texture, using experimental design of randomized complete blocks in 4 x 2 factorial scheme with three replications. Treatments included four pasture combinations (diversified or pure) and animal categories (light and heavy)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L; Glycine max (L.); Merrill; Crop-livestock system integration; Conservationist agriculture.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902012000400018

Maize and wheat production trends in South Africa in a deregulated environment
Provedor de dados: 31
Autores: Breitenbach,   Marthinus C.; Fenyes,   Tamas I.
Qualitative control measures and government regulation of the marketing of agricultural produce was seen as distorting the working of the market mechanism. Trade liberalisation, with tariffication of agricultural produce and the deregulation of the marketing of agricultural produce was therefore promoted. It was expected that producers of agricultural produce would respond to liberalisation efforts and deregulation in a way that would move production closer to some optimum point. An analysis of production trends for maize and wheat confirms that production of these commodities have moved closer to an optimum point, especially after the deregulation of these markets.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/54239

Maize boom in the uplands of Northern Vietnam : economic importance and environmental implications
Provedor de dados: 31
Autores: Keil,   Alwin; Saint-Macary,   Camille; Zeller,   Manfred.
In Vietnam, the demand for meat products has grown dramatically due to rapid economic growth and urbanisation and is expected to further increase in the future. Being the primary source of feed for the country’s livestock and poultry industry, maize has become the second most important crop after rice. While this maize boom has the potential to reduce rural poverty, it promotes the expansion of agricultural cultivation into fragile agro-ecological zones, often leading to deforestation and soil degradation, especially in the uplands. Using empirical evidence from mountainous Yen Chau district in north-western Vietnam, the objective of this paper is to investigate the current economic importance and environmental implications of maize cultivation....
Tipo: Working or Discussion Paper
Palavras-chave: Maize area expansion; Environmental sustainability; Tobit regression; Vietnam; Environmental Economics and Policy; Land Economics/Use; Production Economics.
Ano: 2008
URL: http://purl.umn.edu/92829

Maize: Breeding and Field Testing for Organic Farmers
Provedor de dados: 21
Autores: Goldstein, W.A.; Schmidt, W.; Burger, H.; Messmer, M.; Pollak, L.M.; Smith, M.E.; Goodman, M.M.; Kutka, F.J.; Pratt, R.C.
This chapter contains sections titled:   - Introduction  - What Kind of Maize do Organic Farmers Want?  - Are There Viable Alternatives to Single Cross Hybrids?  - Testing and Using Alternative Hybrids  - Are There Benefits for Breeding under Organic Conditions?  - For Which Traits Is It Necessary to Test under Organic Conditions?  - Choice of Parents for Breeding Programs  - Breeding Programs  - Future Directions  - Notes  - References
Tipo: Book chapter
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2011
URL: http://orgprints.org/26610/1/goldstein-etal-2011-maize_breeding-chapter10-p175-189.pdf

MAIZE BREEDING RESEARCH IN EASTERN AND SOUTHERN AFRICA: CURRENT STATUS AND IMPACTS OF PAST INVESTMENTS MADE BY THE PUBLIC AND PRIVATE SECTORS, 1966-97
Provedor de dados: 31
Autores: Hassan,   Rashid M.; Mekuria,   Mulugetta; Mwangi,   Wilfred.
This report documents the impacts of international maize breeding research in eastern and southern Africa. It draws on information from a comprehensive 1998/99 survey of public and private maize breeding and seed production organizations active in the region. In many countries of eastern and southern Africa, policy reforms introduced in the 1980s and 1990s encouraged private sector participation in the maize seed industry. The private sector now supplies most of the maize seed in the region, spends more on research, and generates a larger number of maize releases than the public sector. Hybrids dominate varietal releases and seed sales, a trend that may negatively affect subsistence-oriented farmers who lack resources to buy fresh seed every season....
Tipo: Working or Discussion Paper
Palavras-chave: Agribusiness.
Ano: 2001
URL: http://purl.umn.edu/23723

MAIZE CROP PHYTOTOXICITY IN RESPONSE TO SUB-DOSES OF SULFOMETURON-METHYL
Provedor de dados: 87
Autores: FELISBERTO,P.A.C.; FELISBERTO,G.; RAMOS,A.R.; TIMOSSI,P.C.
ABSTRACT The use of ripeners has been a common practice in the sugarcane culture. The application of these products is often performed through aerial spraying, which increases the chances of drifting of the ripeners- molecules over the surrounding crops, such as maize. In order to study possible phytointoxication on maize caused by sulfometuron-methyl application, a field experiment was conducted to evaluate the effects of sulfometuron-methyl sub doses on maize when applied at the V4 and V8 development stages. The experiment was installed in a randomized block design with four replications. The treatments followed a 2 x 5 factor scheme, with the first factor corresponding to development stages of maize during which the ripener was applied (V4 and V8) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ripener; Selectivity; Zea mays.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100265

Maize downy mildew research
Provedor de dados: 106
Autores: Bonman, J.M.; Pansak Pittipornchai; Yingyong Paisooksantiratana; Narong Singburaudom; Sukum Chotechuangmanirat; Renfro, B.L.
6 ill., 4 tables
Palavras-chave: Corn; Maize; Downy mildew; Peronosclerospora sorghi; Varieties; Disease resistance; Plant age; Nitrogen fertilizers; Phosphate fertilizers; Disease incidence; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4054

Maize dry matter production and macronutrient extraction model as a new approach for fertilizer rate estimation
Provedor de dados: 42
Autores: MARTINS,KARLA V.; DOURADO-NETO,DURVAL; REICHARDT,KLAUS; FAVARIN,JOSÉ L.; SARTORI,FELIPE F.; FELISBERTO,GUILHERME; MELLO,SIMONE C.
ABSTRACT Decision support for nutrient application remains an enigma if based on soil nutrient analysis. If the crop could be used as an auxiliary indicator, the plant nutrient status during different growth stages could complement the soil test, improving the fertilizer recommendation. Nutrient absorption and partitioning in the plant are here studied and described with mathematical models. The objective of this study considers the temporal variation of the nutrient uptake rate, which should define crop needs as compared to the critical content in soil solution. A uniform maize crop was grown to observe dry matter accumulation and nutrient content in the plant. The dry matter accumulation followed a sigmoidal model and the macronutrient content a power...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Fertilizer rate estimation; Nutrient content; Nutrient partition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000200705

Maize Exportation Threat to Rural Food Security? Results of a Survey of Rural Households in Northern Mozambique
Provedor de dados: 31
Autores: SIMA, Research Team.
Research results from SIMA-Department of Statistics and Department of Policy Analysis MADER-Directorate of Economics
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Maize; Food Security and Poverty; International Relations/Trade; Q18.
Ano: 2002
URL: http://purl.umn.edu/55225

Maize gene review - A new on-line journal promotes community curation of phenotypes
Provedor de dados: 17
Autores: Mary L. Schaeffer.
The first formal phenotype summaries for maize can be found in early editions of the&amp;#xd;&amp;#xa;Maize Genetics Cooperation Newsletter (MNL). Prior to on-line databases, the MNL&amp;#xd;&amp;#xa;served to systematize available mutant stocks, genetic maps, and addresses for maize&amp;#xd;&amp;#xa;geneticists. In fact, the first phenotypic data entered into MaizeGDB, in 1991, was from&amp;#xd;&amp;#xa;the MNL stock center report. To support renewed, community submission of similar&amp;#xd;&amp;#xa;data, the MNL has initiated a new on-line journal, called the &amp;#x2018;maize gene review&amp;#x2019; (MGR,&amp;#xd;&amp;#xa;www.maizegenereview.org). It represents an extension of the Mutants of Maize (1997),&amp;#xd;&amp;#xa;eds MG Neuffer, EH Coe, SR...
Tipo: Presentation
Palavras-chave: Bioinformatics.
Ano: 2009
URL: http://precedings.nature.com/documents/3221/version/1

Maize growth in response to Azospirillum brasilense, Rhizobium tropici, molybdenum and nitrogen
Provedor de dados: 91
Autores: Picazevicz,Angelita A. C.; Kusdra,Jorge F.; Moreno,Andréia de L.
ABSTRACT The objective of this research was to evaluate the effect of Azospirillum brasilense, Rhizobium tropici, nitrogen (N) and molybdenum (Mo) fertilization on maize growth. The experiment was carried out in a greenhouse from October to November 2015, in a completely randomized design, in 2 x 2 x 2 x 5 factorial scheme, with 5 replicates, corresponding to the absence and presence of Azospirillum brasilense, Rhizobium tropici, N (30 kg ha-1) and five Mo doses (0, 7.5, 15.0, 22.5 and 30.0 g ha-1). The analyzed variables were: plant height, basal stem diameter, dry biomass of shoots, roots, total and N accumulated in the shoots. There was double or triple interaction between N fertilization, Azospirillum brasilense and Rhizobium tropici for the evaluated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; PGPR; Diazotrophic microorganisms; Co-inoculation; BNF.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000900623

Maize hybrid yield trial at Chumphon Province in 1992
Provedor de dados: 106
Autores: Nipon Iamsupasit; Chamnan Chutkaew; Narong Wuttiwan; Narisorn Kajonpon.
6 tables
Palavras-chave: Corn; Maize; Hybrids; Yield trial; ข้าวโพด; ลูกผสม; การทดสอบผลผลิต.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4505

Maize improvement program of the Department of Agriculture Thailand
Provedor de dados: 106
Autores: Charas Kitbamroong; Yodsaporn Chantachum; Pichet Grudloyma; Kritchai Jaiserb; Sanit Choowa.
8 tables
Palavras-chave: Corn; Maize; Improvement; ข้าวโพด; การปรับปรุงพันธุ์.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4237

Maize in China: Production Systems, Constraints, and Research Priorities
Provedor de dados: 31
Autores: Meng,   Erika C.H.; Hu,   Ruifa; Shi,   Xiaohua; Zhang,   Shihuang.
Tipo: Report
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2006
URL: http://purl.umn.edu/7648

MAIZE IN EASTERN AND SOUTHERN AFRICA: "SEEDS" OF SUCCESS IN RETROSPECT
Provedor de dados: 31
Autores: Smale,   Melinda; Jayne,   Thomas S.
This synthesis revisits the "maize success story" in Sub-Saharan Africa, drawing selectively from an extensive published literature about maize seed technical change and related policies. The review focuses on the countries of Kenya, Zimbabwe, Zambia, and Malawi, where maize is most important in the food economy, and refers to the period when maize became a dominant food crop through the 1990s. The term "success" is equivocal in this case, both because of the difficult of establishing the appropriate counterfactual and because some of the policies that contributed to success in one period later led to decline. While the "seeds" themselves were the result of innovative, successful maize breeding, boom periods in maize production were episodic and the public...
Tipo: Working or Discussion Paper
Palavras-chave: Maize; Seed technical change; Sub-Saharan Africa; Food policies; Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/16081

Maize in India: Production Systems, Constraints, and Research Priorities
Provedor de dados: 31
Autores: Joshi,   P.K.; Singh,   N.P.; Singh,   N.N.; Gerpacio,   Roberta V.; Pingali,   Prabhu L.
Tipo: Report
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2005
URL: http://purl.umn.edu/7646

Maize in Indonesia: Production Systems, Constraints, and Research Priorities
Provedor de dados: 31
Autores: Swastika,   Dewa K.S.; Kasim,   Firdaus; Sudana,   Wayan; Hendayana,   Rachmat; Suhariyanto,   Kecuk; Gerpacio,   Roberta V.; Pingali,   Prabhu L.
Tipo: Report
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/7647

Maize in Nepal: Production Systems, Constraints, and Priorities for Research
Provedor de dados: 31
Autores: Paudyal,   Kamal R.; Ransom,   Joel K.; Rajbhandari,   Neeranjan P.; Adhikari,   Krishna Prasad; Gerpacio,   Roberta V.; Pingali,   Prabhu L.
Tipo: Report
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2001
URL: http://purl.umn.edu/7652

Maize in Thailand: Production Systems, Constraints, and Research Priorities
Provedor de dados: 31
Autores: Ekasingh,   Benchaphun; Gypmantasiri,   Phrek; Thong-Ngam,   Kuson; Grudloyma,   Pichet.
This is one of a series of seven in-depth country studies on maize production systems in Asia, funded by the International Maize and Wheat Improvement Center (CIMMYT) and the International Fund for Agricultural Development (IFAD). It is part of a project designed to promote sustainable intensification of maize production systems while ensuring equitable income growth and improved food security, especially for poor households that depend on maize. Maize is one of five major crops grown in the uplands of Thailand, along with rice, cassava, sugar cane, and rubber trees. Government-promoted crop diversification, increased population growth, improved transportation networks, inter national trade, expansion of upland farming areas, and increased demand for...
Tipo: Report
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 2004
URL: http://purl.umn.edu/7649

Maize in the Philippines: Production Systems, Constraints, and Research Priorities
Provedor de dados: 31
Autores: Gerpacio,   Roberta V.; Labios,   Jocelyn D.; Labios,   Romeo V.; Diangkinay,   Emma I.
Tipo: Report
Palavras-chave: Crop Production/Industries.
Ano: 2004
URL: http://purl.umn.edu/7650

Maize in Vietnam: Production Systems, Constraints, and Research Priorities
Provedor de dados: 31
Autores: Ha,   Dang Thanh; Thao,   Tran Dinh; Khiem,   Nguyen Tri; Trieu,   Mai Xuan; Gerpacio,   Roberta V.; Pingali,   Prabhu L.
Tipo: Report
Palavras-chave: Crop Production/Industries.
Ano: 2004
URL: http://purl.umn.edu/7651

Maize kernel size and texture: production parameters, quality of eggs of the laying hens and electricity intake
Provedor de dados: 2
Autores: Vieira Filho, Javer Alves; Garcia, Edivaldo Antônio; Seraphim, Odivaldo José; Murakami, Elise Saori Floriano; Molino, Andréa Britto; Santos, Graciene Conceição dos.
The influence of maize corn size and texture on the performance parameters of laying hens and power consumption required for grinding maize corn were evaluated. The experiment was carried out on 384 Isa Brown hens, 36 weeks old, penned in a conventional aviary with 562.5 cm2 bird-1 stocking rate. The treatments were distributed in a completely randomized 2 x 3 factorial design (maize textures: flint and dent; and milling degree: fine, medium and coarse) with eight replicates of eight birds per plot. Data were evaluated with SISVAR and means were compared by Tukey’s test at 5% probability. Difference was reported for the variable texture and flint increased the variables feed intake and egg weight. Significant difference in the characteristics of egg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Feed consumption; Energy efficiency; Processing; Production of eggs.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/25561

Maize: Key agricultural crop in food security and sovereignty in a future with water scarcity
Provedor de dados: 91
Autores: Langner,Josana A.; Zanon,Alencar J.; Streck,Nereu A.; Reiniger,Lia R. S.; Kaufmann,Marielen P.; Alves,Alexandre F.
ABSTRACT The objective in this review was to discuss the importance of maize currently and the crucial role it may play in the future for food production in scenarios of water shortage, as well as the importance of conserving its landrace cultivars, which have a considerable portion of the reserve of genetic variability. Maize plants, when exposed to water deficit, may develop physiological, morphological, biochemical and anatomical adaptation mechanisms. With the aid of genetic improvement, characteristics that impart tolerance are fixed in plants through conventional methods. In this context, ‘Tuxpeño Sequia’ cultivars were developed in Mexico, while in Africa, one of the most important strategies was the development of ‘DT’ (Drought-tolerant) cultivars....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Foods; Landrace cultivars; Climate change.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000900648

Maize leaf development under climate change scenarios
Provedor de dados: 86
Autores: Streck,Nereu Augusto; Langner,Josana Andréia; Lago,Isabel.
The objective of this work was to simulate maize leaf development in climate change scenarios at Santa Maria, RS, Brazil, considering symmetric and asymmetric increases in air temperature. The model of Wang &amp;amp; Engel for leaf appearance rate (LAR), with genotype-specific coefficients for the maize variety BRS Missões, was used to simulate tip and expanded leaf accumulated number from emergence to flag leaf appearance and expansion, for nine emergence dates from August 15 to April 15. LAR model was run for each emergence date in 100-year climate scenarios: current climate, and +1, +2, +3, +4 and +5°C increase in mean air temperature, with symmetric and asymmetric increase in daily minimum and maximum air temperature. Maize crop failure due to frost...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Elevated temperature; Frost risk; Global warming; Leaf appearance; Vegetative development.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010001100001

Maize Market Sheds in Eastern and Southern Africa. Report 1
Provedor de dados: 31
Autores: Govereh,   Jones; Haggblade,   Steven; Nielson,   Hunter; Tschirley,   David L.
A report prepared by Michigan State University for the World Bank under contract No. 7144132, Strengthening Food Security in Sub-Saharan Africa through Trade Liberalization and Regional Integration
Tipo: Report
Palavras-chave: Africa; Markets; Maize; International Relations/Trade; Q13.
Ano: 2008
URL: http://purl.umn.edu/55374

Maize Market Sheds in Eastern and Southern Africa. Report 1. Country Annexes
Provedor de dados: 31
Autores: Aliguma,   Lucy; Ashimogo,   Gasper; Mwale,   Geoffrey S.; Nyoro,   James K.; Phiri,   Alexander; Traub,   Lulama Ndibongo.
Annexes to the report prepared by Michigan State University for the World Bank under contract No. 7144132, Strengthening Food Security in Sub-Saharan Africa through Trade Liberalization and Regional Integration
Tipo: Report
Palavras-chave: Africa; Markets; Maize; Crop Production/Industries; Q13.
Ano: 2008
URL: http://purl.umn.edu/55375

MAIZE MARKETING AND PRICING IN LESOTHO: IMPLICATIONS FOR POLICY REFORM
Provedor de dados: 31
Autores: Makenete,   Andrew L.; Ortmann,   Gerald F.; Darroch,   Mark A.G.
A study was conducted during 1994-1995 amongst policy makers, government officials, retailers and millers in Lesotho to review the maize marketing system and procedures for setting maize prices at producer, mill-gate and consumer levels. Set prices distort price signals which influence decisions to allocate and distribute resources to provide goods and services for markets. Lesotho is a net importer of maize grain, the major staple, implying that maize pricing and marketing policy affect food security. Results indicate flexible informal marketing channels, fixed formal marketing channels and declining real producer, mill-gate and consumer prices in recent years Falling real South African Maize Board export grain prices and evidence of subsidies to...
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy; Crop Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/54977

MAIZE MARKETS AND RURAL STORAGE IN MOZAMBIQUE: A SPATIAL AND TEMPORAL ANALYSIS
Provedor de dados: 31
Autores: Arndt,   Channing; Schiller,   Rico; Philipsen,   Annelotte.
We employ a mixed complementarity problem (MCP) approach to a spatial and temporal equilibrium model of the maize market in Mozambique.  The MCP approach efficiently captures interactions between transpost costs and interest rates, which captures interactions between transport costs and interest rates, which may differ across agents.  Results indicate that differentials in interest rates significantly impact marketing patterns.
Tipo: Conference Paper or Presentation
Palavras-chave: Marketing; Public Economics.
Ano: 1998
URL: http://purl.umn.edu/20991

Maize on-farm adaptive research in Nakhon Sawan province-1986
Provedor de dados: 106
Autores: Chollawuth La-ied; Korntong Puangprakhon; Amnuay Tongdee; Harrington, Larry.
1 ill., 9 tables
Palavras-chave: Corn; Maize; On farm research; Yield trial; ข้าวโพด; ผลผลิต; การทดสอบ; ไร่นาเกษตรกร.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4424

Maize population improvement of the Department of Agriculture
Provedor de dados: 106
Autores: Charas Kitbamroong; Yodsaporn Chantachum; Pichet Grudloyma; Sompong Tongchuay; Somrak Noradechanon; Kritchai Jaiserb; Sanit Choowa; Narongsak Senanarong.
Palavras-chave: Corn; Maize; Population improvement; ข้าวโพด; การปรับปรุงประชากร.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4277

Maize Price Projections for Zambia's 2006/07 Marketing Season
Provedor de dados: 31
Autores: Haggblade,   Steven.
The coming 2005/06 maize harvest promises to be a good one, certainly better than last  season. Market prices have begun falling, and the question now is how far they are likely to fall.  Government currently has a maize export ban in place. This short note aims to assess the likely  price levels this coming season, with and without an export ban.
Tipo: Report
Palavras-chave: Food security; Food policy; Zambia; Maize; Crop Production/Industries; Q18.
Ano: 2006
URL: http://purl.umn.edu/54619

Maize prices in South Africa: Can the producer increase his revenue by marketing grain through cattle?
Provedor de dados: 31
Autores: Mare,   Frikkie A.; Nell,   Wilhelm T.; Willemse,   B.J.
Since the decline in the price of maize from the beginning of 2010, meat has become the new buzzword under maize producers as they are desperately looking for alternatives to increase the value of their crops. It seems as if the price of maize may stay low at levels equal to export parity prices for the next year or two due to very large yields and an increasing level of ending stocks each year. On the other hand, there is the meat sector which is doing extremely well and had even shown positive growth during the worldwide financial crisis. A substantial decrease in the price of beef therefore seems unlikely and makes it a very attractive alternative market for maize. The question, however, is whether the value of maize can be increased by marketing it...
Tipo: Journal Article
Palavras-chave: Livestock Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/96646

Maize Production and Agricultural Policies in Central America and Mexico
Provedor de dados: 31
Autores: Sain,   Gustavo; Lopez-Pereira,   Miguel A.
This paper reviews trends in maize production and consumption in Central America and Mexico in the context of the political and economic changes taking place in the region since the 1970s. The authors focus on the effects of the structural adjustment programs in the 1980s and 1990s. The analysis begins by reviewing the economic context in which maize production occurs in the region and the main economic policy instruments affecting the maize economy. Next, trends in maize consumption and production are analyzed, along with the main factors influencing maize production, including trends in the public financing of maize research and extension. The authors find that several factors related to structural adjustment have defined--and are still defining--the...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy; Crop Production/Industries.
Ano: 1999
URL: http://purl.umn.edu/7680

Maize production in south Vietnam
Provedor de dados: 106
Autores: Vo Dinh Long.
3 tables
Palavras-chave: Corn; Maize; Production; South Vietnam; ข้าวโพด; การผลิต; เวียดนาม.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3892

Maize productivity in succession to cover crops, nitrogen fertilization and inoculation with Azospirillum brasilense
Provedor de dados: 91
Autores: Santos Júnior,Antônio C. dos; Carvalho,Marco A. C. de; Yamashita,Oscar M.; Tavanti,Tauan R.; Tavanti,Renan F. R.
ABSTRACT The use of microorganisms in agriculture such as Azospirillum brasilense and the cultivation of cover crops in the off season, together with nitrogen fertilization, may be interesting alternatives to increase crop yield. The objective of this study was to evaluate the growth, production and nitrogen concentration of maize grown in succession to cover crops and their interactions with A. brasilense inoculation and topdressing mineral N fertilization. The experiment was conducted on Oxisol, in randomized block design in split-split-plot scheme with four repetitions. The plots consisted of four cover crops: jackbean (Canavalia ensiformis), dwarf pigeon pea (Cajanus cajan), crotalaria (Crotalaria spectabilis) and spontaneous vegetation. In the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Diazotrophic bacteria; Plant nutrition.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200966

Maize Productivity, Mycorrhizal Assessment, Chemical and Microbiological Soil Attributes Influenced by Maize-Forage Grasses Intercropping
Provedor de dados: 52
Autores: Méndez,Daniel Fernando Salas; Paula,Alessandra Monteiro de; Ramos,Maria Lucrécia Gerosa; Busato,Jader Galba.
Abstract Mycorrhizae are important components of agroecosystems and the diversification of crops stimulates the abundance of arbuscular mycorrhizal fungi and the participation of symbiosis in plant growth. This experiment examined mycorrhizal assessment, chemical and microbiological soil attributes in a maize-forage grasses intercropping compared to a maize-monocropping system. A complete randomized block design was used with crop systems installed under no-till management with three replicates, as follow: Maize (Zea mays L.); Panicum maximum Jacq. cv. Aruana; Urochloa humidicola (Rendle.) Schweickerdt.; Maize-P. maximum intercropping and Maize-U. humidicola intercropping. In 2015/2016 season, intercropping maize with Panicum maximum Jacq. cv. Aruana or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cropping systems; Arbuscular mycorrhiza; Tropical soils; Grain crops.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100205

Maize properties for industrial uses
Provedor de dados: 106
Autores: Sukoncheun Sringam; Rasamee Supasri.
5 tables
Palavras-chave: Corn; Maize; Varieties; Physical properties; Chemical analysis; Water absorption; Kernel density; Amylose content; ข้าวโพด; คุณสมบัติทางกายภาพ; คุณสมบัติทางเคมี; อะไมโลส; ความหนาแน่นของเมล็ด; ปริมาณ; การดูดซับน้ำ.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4155

Maize research at CIMMYT and its possible implication to the Thai program
Provedor de dados: 106
Autores: Renfro, B.L.
Palavras-chave: Corn; Maize; CIMMYT; Research; World germplasm; Varieties; Staff services; Experitise; Information service; Experiment station; ข้าวโพด; ซิมมิท; แหล่งพันธุกรรม; การให้คำปรึกษา; การฝึกอบรม.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4002

Maize response to inoculation with strains of plant growth-promoting bactéria
Provedor de dados: 91
Autores: Dartora,Janaína; Guimarães,Vandeir F.; Menezes,Cid R. J.; Freiberger,Mariângela B.; Castoldi,Gustavo; Gonçalves,Edilaine. D. V.
ABSTRACT The aim of this study was to evaluate the response of maize to inoculation with strains of plant growth-promoting bacteria (PGPB) in two cultivation years. The experiment was set in a randomized block design with four replicates in two cultivation years (2012/13 and 2013/14). The treatments consisted of PGPB inoculation: control (without N and without inoculation); 30 kg of N ha-1 at sowing (N1); 160 kg of N ha-1 (N1 + 130 kg of N ha-1 as top-dressing); N1 + A. brasilense, Ab-V5; N1 + A. brasilense, HM053; N1 + Azospirillum sp. L26; N1 + Azospirillum sp. L27; N1 + Enhydrobacter sp. 4331; N1 + Rhizobium sp. 8121. Basal stem diameter, plant height, leaf area, shoot dry matter and yield were evaluated. The strain of Rhizobium sp. 8121and the isolate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Azospirillum sp.; Rhizobium sp.; Phytohormones.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000700606

Maize response to nitrogen fertilization timing in two tillage systems in a soil with high organic matter content
Provedor de dados: 90
Autores: Sangoi,Luis; Ernani,Paulo Roberto; Silva,Paulo Regis Ferreira da.
No-tillage systems, associated to black oat as preceding cover crop, have been increasingly adopted. This has motivated anticipated maize nitrogen fertilization, transferring it from the side-dress system at the stage when plants have five to six expanded leaves to when the preceding cover crop is eliminated or to maize sowing. This study was conducted to evaluate the effects of soil tillage system and timing of N fertilization on maize grain yield and agronomic efficiency of N applied to a soil with high organic matter content. A three-year field experiment was conducted in Lages, state of Santa Catarina, from 1999 onwards. Treatments were set up in a split plot arrangement. Two soil tillage systems were tested in the main plots: conventional tillage (CT)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Nitrogen; Immobilization; Leaching; Grain yield.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000300011

Maize Response to Trinexapac-Ethyl and Nitrogen Fertilization
Provedor de dados: 87
Autores: SANGOI,L.; DURLI,M.M.; SOUZA,C.A.; LEOLATO,L.S.; KUNESKI,H.F.; COELHO,A.E.
ABSTRACT: High nitrogen rates favor maize vegetative growth and grain yield losses due to stem lodging. The use of growth regulators can mitigate such effect. This work was carried out aiming to evaluate the effect of trinexapac ethyl on maize hybrids response to side-dress nitrogen rates. The experiment was carried out in Lages, Santa Catarina State, South of Brazil, during two growing seasons with two hybrids (P1680 and P30F53), and four nitrogen rates (0, 150, 300 and 450 kg N ha-1) were tested, with and without the presence of trinexapac ethyl. The experimental design was in randomized blocks arranged in split-split plots, with three replications per treatment. The plants height and ear insertion height, plant lodging and breaking, grain yield and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Side-dress nitrogen; Productivity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100237

Maize Revolutions in Sub-Saharan Africa
Provedor de dados: 31
Autores: Smale,   Melinda; Byerlee,   Derek R.; Jayne,   Thomas S.
There have been numerous episodes of widespread adoption of improved seed and long-term achievements in the development of the maize seed industry in Sub-Saharan Africa. This summary takes a circumspect view of technical change in maize production. Adoption of improved seed has continued to rise gradually, now representing an estimated 44 percent of maize area in Eastern and Southern Africa (outside South Africa), and 60 percent of maize area in West and Central Africa. Use of fertilizer and restorative crop management practices remains relatively low and inefficient. An array of extension models has been tested and a combination of approaches will be needed to reach maize producers in heterogeneous agricultural environments. Yield growth overall has been...
Tipo: Working or Discussion Paper
Palavras-chave: Sub-Saharan Africa; Maize; Seed; Agricultural and Food Policy; Production Economics.
Ano: 2011
URL: http://purl.umn.edu/113651

Maize root growth and P uptake dependency on spatial distribution of sewage sludge, sewage sludge ash, and TSP
Provedor de dados: 21
Autores: Lemming, Camilla; Oberson, Astrid; Jensen, Lars Stoumann; Magid, Jakob.
Shoot P uptake from TSP was largely increased by the localized placement.  For the ASH, the localized placement clearly decreased shoot P uptake from the ash.   For Sewage Sludge, localized placement decreased P uptake from the soil whereas P uptake from the sludge was almost unaffected.  • Overall, total shoot P uptake was significantly affected by the treatment (p&lt;0.005).
Tipo: Conference paper, poster, etc.
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2014
URL: http://orgprints.org/27961/7/27961.pdf

MAIZE STOVER DEGRADATION UNDER THE INFLUENCE OF HALOXYFOP-METHYL UNDERDOSES
Provedor de dados: 87
Autores: JASPER,S.P.; VELINI,E.D.; PICOLI JR.,G.J.; CARBONARI,C.A.; SILVA,P.R.A.
ABSTRACT One of the major constraints to sustainable tillage is the rapid decomposition of the dry matter. The mechanism known to facilitate this process is the interference in the metabolic pathways of lignin polymers from spraying herbicide underdoses. This study has aimed to verify the effect of underdoses of haloxyfop-methyl in the synthesis of lignin and correlate the interference of this phenolic compound in the decomposition of maize stover. Two preliminary experiments were carried out in a greenhouse to set up the best underdoses to be applied in the yield area experiment. The treatments in the first experiment consisted of: 0; 2.5; 5 and 10 g a.i. ha-1 of haloxyfop-methyl herbicide. And in the second experiment: 0; 0.625; 1.25 and 2.5 g a.i. ha-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Herbicide; Levels of lignin; Growth stimulus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300509

Maize streaked dwarf virus disease in Japan
Provedor de dados: 106
Autores: Hino, Toshihiko.
2 tables
Palavras-chave: Corn; Maize; Streaked dwarf virus; Plant diseases; Japan; ข้าวโพด; โรคไวรัส; โรคพืช; ญี่ปุ่น.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3906

Maize susceptibility to drought at flowering: a new approach to overcome the problem
Provedor de dados: 65
Autores: Sangoi,Luís; Salvador,Ricardo Jonathan.
Among the agronomically important grasses, maize is the most susceptible to drought at flowering. Drought stimulates a protandrous pattern of development, increasing the anthesis-silking interval. Because maize has a short period of flowering and pollen remains viable for only a short period of time, each day of delay between pollen shed and silk emergence will reduce the rate of sexual fertilization and increase barrenness. The purpose of this article is to present an ideotype of maize designed to overcome this problem. The biological model described here can reduce sensitivity to water deficiency through morphological and anatomical modifications, such as the transference of the ear from the axil of a leaf to the apex of the plant; condensation of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Water deficiency; Ideotype.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781998000400027

Maize yield after long-term application of pig slurry
Provedor de dados: 91
Autores: Menezes,June F. S.; Silva,Mariana P. da; Caetano,Jeander O.; Cantão,Veridiana C. G.; Benites,Vinícius de M.
ABSTRACT Organic wastes produced in large quantities in pig farms, such as liquid swine manure (LSM), can become a good alternative source of nutrients for agriculture, thus enabling total or partial replacement of mineral fertilizers in agricultural crops. The aim of this study was to evaluate the use of LSM as a substitute of mineral fertilizer in the maize crop under Cerrado soil conditions. The treatments consisted of using mineral fertilization recommended for the maize crop; without fertilization; and LSM doses (25, 50,100 and 200 m3 ha-1). Maize grain yield was evaluated in the 2004/2005, 2005/2006, 2006/2007, 2007/2008, 2009/2010, 2011/2012 and 2013/2014 crop seasons. The mineral fertilization in maize can be replaced by pig slurry doses from 100...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic fertilizer; Sustainable waste disposal; Swine.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001000686

Maize yield and rainfall on different spatial and temporal scales in Southern Brazil
Provedor de dados: 86
Autores: Bergamaschi,Homero; Wheeler,Timothy Robert; Challinor,Andrew Juan; Comiran,Flávia; Heckler,Bruna Maria Machado.
This study aimed to establish relationships between maize yield and rainfall on different temporal and spatial scales, in order to provide a basis for crop monitoring and modelling. A 16-year series of maize yield and daily rainfall from 11 municipalities and micro-regions of Rio Grande do Sul State was used. Correlation and regression analyses were used to determine associations between crop yield and rainfall for the entire crop cycle, from tasseling to 30 days after, and from 5 days before tasseling to 40 days after. Close relationships between maize yield and rainfall were found, particularly during the reproductive period (45-day period comprising the flowering and grain filling). Relationships were closer on a regional scale than at smaller scales....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Rainfall; Water deficit; Crop models; Critical period.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000500001

Maize Yield Response to Fertilizer and Profitability of Fertilizer Use Among Small-Scale Maize Producers in Zambia
Provedor de dados: 31
Autores: Xu,   Zhiying; Govereh,   Jones; Black,   J. Roy; Jayne,   Thomas S.
Multi-year nationwide survey data is used to estimate maize yield response functions and determine profitability of fertilizer use by small-scale farmers in Zambia. There has been a dearth of empirical studies on economics of fertilization in the context of Sub-Saharan Africa. In this paper we identify major methodological issues arising from using survey data and estimate maize yield response functions for small-scale rural households that have various management practices and soil conditions in two major agro-climatic zones. Profitability of fertilizer use is determined for each group of households. Our findings provide the following key messages. First, households that obtained fertilizer on time and used animal draught power or mechanical power for...
Tipo: Conference Paper or Presentation
Palavras-chave: Maize; Yield; Fertilizer; Profitability; Survey data; Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/25730

Maize yields and carbon pools in response to poultry litter, rock phosphate and P-solubilizing microorganisms
Provedor de dados: 63
Autores: Yagi,Renato; Quadros,Thainara Camila Fernandes; Martins,Bruno Henrique; Andrade,Diva Souza.
ABSTRACT: The acid release of phosphates from rock phosphates (RP) and the retention of ammonium by inorganic phosphates have been studied separately in composting; however, there is a gap in the knowledge of combined application of RP with organic residues and microorganisms. The objectives were to evaluate the combined application of fresh poultry litter (PL) with RP and P-solubilizing microorganisms (M) on soil organic matter pools, microbial biomass C (MB-C) and on whole-plant silage maize and grain yields. Two field experiments tested the effects of timing of applications of PL (8 Mg ha–1), RP (4 Mg ha–1) and microorganisms on soil organic matter pools, nutritional aspects and productive components of maize crop whole-plant silage. A second experiment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Microbial biomass C; Organic C; Humin fraction C; Integrated soil fertility.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000301401

Maize (Zea Mays L) landraces from the southern region of Brazil: contamination by Fusarium sp, zearalenone, physical and mechanical characteristics of the kernels
Provedor de dados: 52
Autores: Oliveira,Tatiana Roselena de; Jaccoud-Filho,David de Souza; Henneberg,Luciana; Michel,Milton Domingos; Demiate,Ivo Mottin; Pinto,Alessandra Teixeira Barbosa; Machinski Junior,Miguel; Barana,Ana Cláudia.
This work had as objectives the study of the physical and mechanical characteristics of maize kernels in relation to the contamination by Fusarium sp and by zearalenone in twenty landraces of maize from the southern region of Brazil. From the analyzed samples, 60 % has been considered to have a hard endosperm type and 40 % an intermediary one. A correlation between the physical and mechanical variables was observed as an indication that the higher is the proportion of hard endosperm, more dense will be the kernel and more force for its rupture will be necessary. The level of contamination by Fusarium sp was between 5.5 and 24.75% among the analyzed grains, correlating positively with the flotation index, indicating that the landraces of maize with a softer...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fungi; Texture of endosperm; Corn landraces; Mycotoxins.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000700002

Maize-Dwelling insects omnivory in Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) egg masses
Provedor de dados: 52
Autores: Menezes-Netto,Alexandre Carlos; Varella,Andrea Corrêa; Fernandes,Odair Aparecido.
This work reports the first record of omnivory behavior of Diabrotica speciosa (Coleoptera, Chrysomelidae), Leptoglossus zonatus (Hemiptera, Coreidae), Monocrepidius aff. posticus and Monocrepidius fuscofasciatus (Coleoptera, Elateridae) on fall armyworm Spodoptera frugiperda (Lepidoptera, Noctuidae) egg masses in maize fields. Macrophotography was used to record the activity of these insects on fall armyworm sentinel egg masses during 2009 and 2010 maize growing seasons. The presence of omnivorous insects changes the species population dynamics within the ecosystem. Therefore, the implications of these interactions should be understood and taken into consideration for integrated pest management enhancement.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Facultative predator; Phytozoophagy; Predation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000100012

MaizeGDB , maize genetics cooperation and the ~2500MB B73 genome generated tsunami
Provedor de dados: 17
Autores: Mary Schaeffer; Jack Gardiner; Elisabeth Harper; Carson Andorf; Darwin Campbell; Ethalinda Cannon; Taner Z. Sen; Carolyn Lawrence.
Advances in sequencing technology have made it possible to sequence the 2500 MB B73 maize genome, both cheaply and in a relatively short time. Nearly simultaneously, other sequencing-based data are on the leading edge of a data tsunami: sequenced differences (currently &amp;#x3e;300,000 SNP for  &amp;#x3e;1000 inbred lines and related species) and gene expression data.  The MaizeGDB team integrates access to these datasets after considerable cooperation among both data users and suppliers, and typically while the data are being generated. In this way, data suppliers have resources in place to format data ready for integration with MaizeGDB.  And, we learn what details, including links to other resources, are needed to support our user community and what...
Tipo: Presentation
Palavras-chave: Genetics &amp; Genomics; Bioinformatics.
Ano: 2010
URL: http://precedings.nature.com/documents/5258/version/1

Maize-Rice Cropping Systems in Bangladesh: Status and Research Opportunities
Provedor de dados: 31
Autores: Ali,   M. Yusuf; Waddington,   Stephen R.; Hodson,   Dave P.; Timsina,   J.; Dixon,   John.
Responding to demand from expanding poultry feed markets, maize area in Bangladesh rose from only a few thousand hectares in the 1980s to more than 200,000 hectares in 2007-08. This publication describes the rise of maize in Bangladesh, emerging problems or risks, technology options for rice-maize systems, and future research and development needs. It also outlines the role of CIMMYT, through its Bangladesh office, in the establishment and promotion of maize, as well as the provision of germplasm and capacity building for researchers and farmers, in collaboration with the Bangladesh Agricultural Research Institute (BARI), the Department of Agricultural Extension (DAE), and diverse non-governmental organizations.
Tipo: Report
Palavras-chave: Maize; Rice; Cropping patterns and systems; Agricultural development; Planting date; Technology transfer; Yield increases; Bangladesh; Crop Production/Industries; F08; E10.
Ano: 2008
URL: http://purl.umn.edu/56106

Major organic dairy farm types in Germany and their farm,  herd, and management characteristics
Provedor de dados: 21
Autores: Ivemeyer, Silvia; Brinkmann, Jan; March, Solveig; Simantke, Christel; Winckler, Christoph; Knierim, Ute.
Organic milk production varies due to topographical and structural farm conditions, but very little information is available about this variation in Germany.  The aim of this study was to identify typical major farm types (MFTs) of German organic dairy farms and to describe their farm, herd, and management characteristics.  Based on data from 204 organic dairy farms from previous studies with representative samples, fourMFTs were identified by cluster analysis. Cluster-criteria were herd size, milk yield, region, and housing system. Identified MFTs were (A) medium-scale herds with low-tomedium milk yield, (B) small-scale herds with low milk yield, (C) large scale herds with high milk yield, and (D) medium-scale herds in Southern Germany with medium milk...
Tipo: Journal paper
Palavras-chave: Beef cattle; Feeding and growth; Breeding and genetics; Health and welfare.
Ano: 2017
URL: http://orgprints.org/32925/1/10.1007_s13165-017-0189-3.pdf

Making the market: How U.S. Policy influences near term agriculture and biofuel industry production and profitability under technology adoption
Provedor de dados: 31
Autores: Meyer,   Seth D.; Binfield,   Julian C.R.; Westhoff,   Patrick C.
The beneficiaries of technology adoption in agriculture and biofuels markets in the United States are heavily influenced by domestic biofuel policies and market context. Biofuel mandates, one of the key pillars of domestic biofuel policies, may significantly alter the elasticity of demand for biofuels as well as the derived demand for maize used to produce a significant share of ethanol in the United States. Using a stochastic agriculture and biofuels model, we assess how the introduction of technology may affect the crops and biofuel markets under binding and non-binding biofuel mandates and discuss the implications for analysis of EU biofuel policies.
Tipo: Conference Paper or Presentation
Palavras-chave: Biofuels; Policy; Technology adoption; Mandates; Agricultural and Food Policy; Farm Management; Land Economics/Use.
Ano: 2010
URL: http://purl.umn.edu/61089

Malawi’s Maize Marketing System
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Sitko,   Nicholas J.; Ricker-Gilbert,   Jacob; Mangisoni,   Julius H.
National food security in Malawi depends on improving the performance of maize markets. Ensuring that grain is consistently available at tolerable prices is crucial for consumers’ food security. At the same time, surplus producing farmers need to receive farm-gate prices consistently above production costs to intensify the use of fertilizer and other productivity enhancing technologies in a sustainable manner. These concerns give rise to the classic food price dilemma for policy makers in Malawi: how to keep prices low enough to ensure low income consumers’ access to food while keeping prices high enough to promote farm production incentives. These tensions cannot be avoided but they can be relieved through reducing food marketing margins, which shrink the...
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Malawi; Maize; Marketing; Food policy; Agricultural and Food Policy; Community/Rural/Urban Development; Food Security and Poverty; International Development; Marketing; Q12; Q18.
Ano: 2010
URL: http://purl.umn.edu/62162

MANAGEMENT OF IRRIGATION AND NITROGEN FERTILIZERS TO REDUCE AMMONIA VOLATILIZATION
Provedor de dados: 90
Autores: Viero,Fernando; Bayer,Cimélio; Vieira,Renan Costa Beber; Carniel,Eduardo.
ABSTRACT Nitrogen losses by ammonia (NH3) volatilization can be reduced by appropriate irrigation management or by alternative N sources, replacing urea. The objective of this study was to evaluate the efficiency of irrigation management and N source combinations in decreasing NH3 volatilization from an Argissolo Vermelho Distrófico típico cultivated for 28 years with black oat (Avena strigosa) and maize (Zea mays), under no-tillage in the region of Depressão Central, Rio Grande do Sul, Brazil. The experiment was arranged in a randomized block design with split plots with three replications, where the main plots consisted of irrigation systems: no irrigation; irrigation immediately before and irrigation immediately after fertilization. The subplots were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen sources; N fertilization; N losses.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601737

MANAGEMENT OF MAIZE STOVER WITH UNDERDOSES RATES OF GLYPHOSATE APPLICATIONS IN NO-TILLAGE
Provedor de dados: 87
Autores: JASPER,S. P.; PICOLI JR,G. J.; VELINI,E. D.; SOUSA,S. F. G.; CARBONARI,C. A.
ABSTRACTGlyphosate has significant effects on the growth and development of plants when in underdoses. This work was developed to verify the effect of the application of glyphosate in underdoses in lignin synthesis and consequently decomposition of maize stover. Two experiments were conducted; the first one in a greenhouse for underdoses adjustments and the second one in the production area. The experimental design of the first trial was completely randomized with four replications. The treatments consisted in the application of the underdoses: 0, 25, 50 and 100 g ha-1 of glyphosate. In the production area, the experimental design was a randomized block with four replications, in underdoses: 0, 12.5, 25 and 50 g ha-1. The results were submitted to analysis...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Stover decomposition; Lignification; Growth stimulus.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300543

Management of the manufacturing of canned baby corn
Provedor de dados: 106
Palavras-chave: Corn; Maize; Kernel corn; Canned corn production; Manufacturing; ข้าวโพด; ข้าวโพดฝักอ่อน; อุตสาหกรรมข้าวโพดฝักอ่อนบรรจุกระป๋อง.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4318

Management practices for improving yield of two corn varieties
Provedor de dados: 106
3 ill., 1 table
Palavras-chave: Corn; Maize; Varieties; Fertilizers; Plant densities; Spacing; Cultural practices; Management; Yields; ข้าวโพด; การจัดการ; การเพาะปลูก; การปรับปรุงผลผลิต.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3755

Management practices for improving yield of two promising early and one standard late variesties of corn at Chainat in dry season
Provedor de dados: 106
Autores: Tavanwong Prompobet.
3 ill., 1 table
Palavras-chave: Corn; Maize; Varieties; Fertilizers; Plant densities; Spacing; Cultural practices; Management; Yields; Chainat; Dry season; ข้าวโพด; การเพาะปลูก; พันธุ์เบา; พันธุ์หนัก.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3756

Manejo da adubacao fosfatada corretiva para as culturas do milho e do feijoeiro irrigado em rotacao.
Provedor de dados: 14
Autores: MIRANDA, L. N. de; AZEVEDO, J. A. de; MIRANDA, J. C. C. de; GOMES, A. C.
bitstream/CPAC-2010/22727/1/rectec-29.pdf
Tipo: Recomendação Técnica (INFOTECA-E)
Palavras-chave: Rotacao de culturas; Brasil; Bean; Maize; Phosphate fertilizers; Solo: Adubacao.; Adubação; Cerrado; Feijão; Fosfato; Irrigação; Milho; Phaseolus Vulgaris; Zea Mays.; Crop yield; Crop rotation; Irrigation.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/566092

Manejo da diversidade genetica do milho e melhoramento participativo em comunidades agricolas nos estados do Rio de Janeiro e Espirito Santo.
Provedor de dados: 14
Autores: MACHADO, A. T.; MACHADO, C. T. de T.; COELHO, C. H. M.; ARCANJO, J. N.
Para identificar e selecionar genotipos adaptados as condicoes de pequenos agricultores do Espirito Santo e do Rio de Janeiro, foram avaliadas variedades de milho e realizados trabalhos de melhoramento participativo nas comunidades de Sol da Manha, em Seropedica (RJ); Vala Preta, em Mage (RJ) e Fortaleza, em Muqui (ES). Em 2000-2001, foram avaliadas dezesseis variedades e quatro ciclos de selecao da variedade Sol da Manha em Seropedica e Mage. Naquele ano, em Seropedica, foram conduzidos dois ensaios, um com baixo e outro com alto nível de N.Outras dezesseis variedades foram avaliadas em 2001-2002 em Sropedica e Miqui. O delineamento experimental foi o de blocos ao acaso, com tres repeticoes, utilizando em todos os experimentos. No primeiro ano em, Mage,...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Rio de Janeiro; Espirito Santo; Brasil; Variety; Maize.; Agricultura Familiar; Cerrado; Genética Vegetal; Nitrogênio; Melhoramento Genético Vegetal; Milho; Variedade; Zea Mays.; Brazil; Family farms; Plant breeding.; Nitrogen.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567110

Manejo da diversidade genética e melhoramento participativo de milho em sistemas agroecológicos.
Provedor de dados: 21
Autores: Machado, Altair Toledo; Machado, Cynthia Torres de Toledo; Nass, Luciano Lourenço.
Este trabalho avaliou variedades melhoradas de forma convencional e participativa, novas variedades e variedades locais em diferentes ambientes para verificar o seu potencial genético para melhoramento e posterior uso em diferentes agroecossistemas. Os locais de avaliação foram a área experimental da Embrapa Cerrados, considerada um área convencional, Assentamento Cunha considerada de transição agroecológica e com problemas de estresse devido a pouca disponibilidade de fósforo e o Assentamento Colônia II, área considerada agroecológica. Os resultados desses experimentos demonstraram o potencial das variedades melhoradas de forma participativa Eldorado e Fortaleza, das variedades construídas de forma participativa MC 20, MC 50 e MC 60 e da variedade local...
Tipo: Journal paper
Palavras-chave: Production systems Farming Systems Cereals; Pulses and oilseeds Breeding and genetics Breeding; Genetics and propagation.
Ano: 2011
URL: http://orgprints.org/24142/1/Machado_Manejo.pdf

Manejo da irrigacao do milho para silagem.
Provedor de dados: 14
Autores: AZEVEDO, J. A. de; ROCHA, C. M. C. da.
bitstream/CPAC-2010/23077/1/rectec-37.pdf
Tipo: Recomendação Técnica (INFOTECA-E)
Palavras-chave: Alimentacao para animal; Maize; Brasil; Irrigacao por Pivo-central.; Cerrado; Irrigação; Milho; Nutrição Animal; Silagem; Zea Mays.; Animal nutrition; Irrigation; Silage.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/566472

Manejo das pragas iniciais de milho mediante o tratamento de sementes com inseticidas sistêmicos.
Provedor de dados: 14
Autores: CRUZ, I.; VIANA, P. A.; WAQUIL, J. M.
Pragas subterraneas; Pragas de superficie; Manejo integrado; Tratamento de sementes; Efeito de inseticidas sobre a germinacao; Uso de grafite em plantadeiras; Equipamentos para tratamento.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize; Pest; Management; Seed; Pesticide; Tratment.; Controle Químico; Inseticida; Manejo; Milho; Praga; Semente; Tratamento; Zea Mays.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/482101

Manejo de recursos en la agricultura campesina:  producción de maíz en el municipio de San José Chiapa, Puebla.
Provedor de dados: 32
Autores: Turiján Altamirano, Teresa.
El maíz es uno de los principales cultivos en el municipio de San José Chiapa, Puebla, su producción puede variar de acuerdo al contexto edafoclimático, social y económico en donde se desarrolle, así como por los recursos empleados en su manejo, principalmente el tipo de tecnologías, uso de agroquímicos, y los recursos aportados por la ganadería familiar. La presente investigación tuvo como objetivos reconocer los tipos de tecnologías que predominan en el manejo del maíz y cómo influyen en la productividad del cultivo; conocer el uso de agroquímicos utilizados por los productores y hacer una comparación con las recomendaciones del paquete tecnológico del INIFAP; de igual manera reconocer la relación que existe entre el manejo y la ganadería familiar. Para...
Palavras-chave: Tecnologías campesinas; Tecnologías modernas; Manejo del cultivo; Agroquímicos; Ganadería familiar; Peasant technologies; Modern technologies; Crop management; Chemicals; Familiar livestock; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2010
URL: http://hdl.handle.net/10521/369

Manejo do esterco líquido de suínos e sua utilização na adubação do milho.
Provedor de dados: 14
Autores: KONZEN, E. A.; PEREIRA FILHO, I. A.; BAHIA FILHO, A. F. de C.; PEREIRA, F. A.
bitstream/item/37504/1/circ-25.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize; Fertilization; Manure.; Adubação; Dejeto; Esterco; Milho; Suíno; Zea Mays.; Swine; Wastes.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478848

Manejo e conservação de solos para culturas alimentares nas condições tropicais umidas.
Provedor de dados: 14
Autores: BAENA, A. R. C.
bitstream/item/228210/1/Manejo-e-conservacao-de-solos-para.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Caupi; Conservacao de solo; Cultivo alimentar; Regiao tropical umida; Maize; Arroz; Feijão de Corda; Mandioca; Manejo do Solo; Milho; Cassava; Cowpeas; Food crops; Rice; Soil conservation; Soil management.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381831

Manipulação de cereais para acúmulo de lisina em sementes
Provedor de dados: 63
Autores: Molina,Silvia Maria Guerra; Gaziola,Salete Aparecida; Lea,Peter John; Azevedo,Ricardo Antunes.
A lisina é um aminoácido essencial cuja via de biossíntese faz parte da via metabólica do ácido aspártico, pela qual são também sintetizados os aminoácidos treonina, metionina e isoleucina. Além disso, a lisina é o principal aminoácido limitante em todos os cereais e por cerca de 30 anos a via do ácido aspártico tem sido estudada em plantas, com o intuito de desvendar e caracterizar os principais pontos chave na regulação das vias de biossíntese desses aminoácidos. Duas etapas distintas, uma primeira originada a partir do desenvolvimento da cultura de tecidos (anos 70-80) e a segunda a partir do desenvolvimento de técnicas para a transformação de plantas (anos 90), permitiram que mutantes bioquímicos e plantas trangênicas fossem produzidos com alterações...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lisina; Nutrição; Aminoácidos essenciais; Cereais.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000100032

Manual de laboratorio Calosa como herramienta de selección para tolerancia del maíz al aluminio
Provedor de dados: 31
Autores: Arcos,   Alba Lucia; Narro,   Luis A,.
Tipo: Report
Palavras-chave: Zea mays; Calosa; Herencia; Dialelo; Heterosis; Métodos de selección; Suelos ácidos; Germoplasma; Colombia; Crop Production/Industries; F30.
Ano: 2009
URL: http://purl.umn.edu/56175

Manual for conducting socioeconomic surveys through Pocket Portable Device Assistants (PDAs) and personal computers
Provedor de dados: 31
Autores: Perea,   Federico Carrion; La Rovere,   Roberto.
Tipo: Report
Palavras-chave: Socioeconomic environment; Surveys; Computers; Computer software; Data collection; PDAs; Personal computers; Research Methods/ Statistical Methods; U40; E10.
Ano: 2009
URL: http://purl.umn.edu/56176

Manufacturing of agricultural machinery in Bangladesh: opportunities and constraints
Provedor de dados: 111
Autores: Alam, M. Monjurul; khan, M. I. N.; Saha, Chayan Kumer; Rahman, Anisur; Bhuyian, M. G. K.
Despite numerous limitations, agricultural machinery (AM) manufacturing sub-sector inBangladeshis growing quite satisfactorily and has potential to make substantial contribution to much needed non-farm economic growth, employment generation, mechanization of on and off-farm agricultural activities, and as a whole orientation in the national development.  This study made an attempt to take account of AM manufacturers, importers, traders/wholesalers and retailers, their associations, assess market potential and identify serious bottlenecks associated with this sub-sector.  Stratified random sampling technique was used for identifying respondents in quantitative survey, while focus group discussions (FGDs) and Key Informant Interviews (KIIs) were conducted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural machinery; Spare parts; Manufacturing; Supply chain; Marketing; Import vs local quality; Constraints.
Ano: 2017
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3682

Manure and fertilizer effects on carbon balance and losses for irrigated corn
Provedor de dados: 18
Autores: Lentz, R.D.; Lehrsch, G.A.
Little is known about inorganic fertilizer or manure effects on organic carbon (OC) and inorganic C (IC) losses from a furrow irrigated field, particularly in the context of other system C gains or losses.  In 2003 and 2004, we measured dissolved organic and inorganic C (DOC, DIC), particulate OC and IC (POC, PIC) concentrations in irrigation inflow, runoff, and percolation waters (6-7 irrigations/y); C inputs from soil amendments and crop biomass; harvested C; and gaseous C emissions from field plots cropped to silage corn (Zea mays L.) in southern Idaho.  Annual treatments included:  (M) 13 (y 1) and 34 Mg/ha (y 2) stockpiled dairy manure; (F) 78 (yr 1) and 195 kg N/ha (y 2) inorganic N fertilizer; or (NA) no amendment--control.  The mean annual total C...
Tipo: Article
Palavras-chave: Corn / maize; Dissolved Organic Carbon (DOC); Manure.
Ano: 2014
URL: http://eprints.nwisrl.ars.usda.gov/1546/1/1504.pdf

Mapping of a novel viviparous unstable mutant of maize (vp 12)
Provedor de dados: 54
A new viviparous mutant of maize (Zea mays L.), associated with genetic instability and designated viviparous-12 (vp12), was identified in a synthetic Tuxpeño adapted to tropical regions. In the present work, the linkage group of this new locus was determined. Progenies of inbred line L477 segregating for the vp12 mutant were crossed with waxy-marked reciprocal translocation stocks. The phenotypic frequencies of the wx and vp12 mutants were analyzed in F2 progenies. The results demonstrated that the Viviparous-12 locus of maize is located on the long arm of chromosome 6.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000100013

Margens de comercialização de arroz, feijão e milho no Estado do Pará.
Provedor de dados: 14
Autores: HOMMA, A. K. O.
bitstream/item/197906/1/FL03983.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Bean; Maize; Arroz; Comercialização; Feijão; Milho; Rice; Trade.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378138

Marginal abatement costs for reducing leaching of nitrates in Croatian agriculture
Provedor de dados: 21
Autores: Sumelius, John; Mesic, Milan; Grgic, Zoran; Kisic, Ivica; Franic, Ramona.
The aim of this paper is to estimate marginal abatement costs (MAC) of N-fertiliser tax policies which aim to prevent NO3 levels from rising. Estimates of MAC provide information on how large reductions in Nfertilisation rates should be before other measures are considered. Based on N-response experiments from Croatian field trials with maize, N-response curves were estimated and profit maximising N-doses were derived. Values of NO3-N concentration in lysimeter water from the same treatments were used to estimate an NO3-leaching function. A sample of 20 Croatian family farms was used to obtain records of producer and input prices as well as actual N-doses. Abatement costs and MAC for an N-tax, a product tax and an Nquota were estimated. The MAC for all the...
Tipo: Journal paper
Palavras-chave: Air and water emissions.
Ano: 2005
URL: http://orgprints.org/16842/1/sumelius.pdf

MARGINAL ABATEMENT COSTS FOR REDUCING LEACHING OF NITRATES IN CROATIAN FARMING SYSTEMS
Provedor de dados: 31
Autores: Sumelius,   John; Grgic,   Zoran; Mesic,   Milan; Franic,   Ramona.
The aim of this paper is to identify optional ways of preventing NO3-levels from rising within Croatian farming systems, and the implications from the viewpoint of the manager.  More specifically, the purpose is to 1) Determine whether Croatian farmers exceed profit maximising levels of N-fertilizer use in maize cultivation, and its possible influence on NO3 –N-levels.  2) To estimate the marginal abatement cost (MAC), at the farm level, of reducing NO3 –N leaching through the following instruments: a tax on optimal N-doses, a product tax and an N-fertiliser quota and a requirement for all instruments to correspond to the same abatement level.  Based on.  N-response experiment from feld trial for maize N-response curves were estimated.  A sample of 20...
Tipo: Conference Paper or Presentation
Palavras-chave: Marginal abatement cost; N-response; Nitrate Directive; Taxes; Effluent production function; Croatia.; Environmental Economics and Policy; Q12; Q25.
Ano: 2003
URL: http://purl.umn.edu/25909

Marker für die Zulassung von Maispopulationssorten
Provedor de dados: 21
Autores: Büttner, B.; Eder, B.; Eder, Joachim; Schweizer, G.
The genetic resource of adapted German maize landraces is threatened to get lost. Unsolved admission standards at the Federal Office for Plant Varieties are a main obstacle for breeders to use such material. Until now each application for admission has been rejected due to missing homogeneity. Therefore, population specific marker alleles should be developed and deposited at the Federal Office for Plant Varieties as further selection criteria. A first step is the development of markers for phenotypic apparent traits. We developed three markers for red and white cob glume color and used them for selection of two maize populations. The next step would be the development of non-genic markers. Although these markers have no phenotypic effects they also do not...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Breeding; Genetics and propagation Root crops.
Ano: 2017
URL: http://orgprints.org/31593/1/Marker%20f%C3%BCr%20die%20Zulassung%20von%20Maispopulationssorten.pdf

Market Access by Smallholder Farmers in Malawi: Implications for Technology Adoption, Agricultural Productivity, and Crop Income
Provedor de dados: 31
Autores: Zeller,   Manfred; Diagne,   Aliou; Mataya,   Charles.
In Malawi, maize is the major crop and food staple. Given limited off-farm employment opportunities, much-needed increases in household income for improving food security must come from gains in agricultural productivity through better technology and more profitable crops. In the past, agricultural policy promoted hybrid maize and, more recently, tobacco to increase smallholder income. This paper presents an analysis of what determines the adoption of these two crops and what kind of income effects follow from adoption. Apart from factor endowment and exposure to agroecological risks, differences in the household's access to financial and commodity markets significantly influence its cropping shares and farm income.
Tipo: Working or Discussion Paper
Palavras-chave: Employment; Non-agricultural; Malawi; Tobacco; Price; Food Security; Maize; Crop Production/Industries; Marketing.
Ano: 1997
URL: http://purl.umn.edu/97054

Market Integration and Efficiency in the Presence of Cross-border Trade Restrictions: Evidence from selected Maize Markets in Southern Africa
Provedor de dados: 31
Autores: Mutambatsere,   Emelly; Christy,   Ralph D.
This study evaluates the extent to which regional trade might be relied upon as a policy strategy in achieving food security in southern Africa. The logic is that if significant diversities exist in production expertise and capacities for countries within the region, in the presence of integrated marketing systems, free trade can improve both supply and trade efficiency. Two components of the debate are analyzed: revealed competitiveness in production and export of the main staple – maize; and for a selected set of major markets, the nature of market interactions within the current regional trade policy framework. The analyses employ mainly non-parametric assessments, including such measures as revealed comparative advantage, price difference and transfer...
Tipo: Conference Paper or Presentation
Palavras-chave: International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/6304

Market Integration with Transaction Costs in Developing  Country Staple Food Markets: the Case of the Malawi Maize market
Provedor de dados: 31
Autores: Zant,   Wouter.
We investigate measurement of market integration of staple food markets in developing countries. The analysis takes the Parity Bound Model as starting point and modifies this model by parameterizing and estimating transaction costs. The specification of transaction costs takes account of transport costs, fixed source costs, fixed destination costs, ad valorem taxes &amp; levies and seasonality an is implemented on the basis of a specific sub-sample of price differentials. Price differentials combined with predicted transaction costs enable the measurement of market integration for each location and each period. The proposed method is applied to the Malawi maize market with monthly data from June 1999 to October 2009 for 26 districts. This period covers two...
Tipo: Journal Article
Palavras-chave: Food markets; Transaction costs; Trade; Market integration; Parity Bound Model; Malawi; Africa; Crop Production/Industries; Marketing; F14; Q13.
Ano: 2010
URL: http://purl.umn.edu/95777

Market Liberalization and Agricultural Intensification in Kenya (1992-2002)
Provedor de dados: 31
Autores: De Groote,   Hugo; Kimenju,   Simon Chege; Owuor,   George; Wanyama,   Japheter.
This study analyses the impact of the liberalization on the intensification of maize production in Kenya. It first analyses the impact of liberalization on input and output prices, followed by an analysis of farmer practices comparing two major farmer surveys, from 1992 and 2002. The results show that liberalization has had a general positive impact on the evolution of prices, with a decrease of input/output price ratios. However, fluctuations of maize prices has become very high and, combined with a decrease of marketing by the marketing board, has increased the uncertainty in maize production. The liberalization has also resulted in a decrease in extension services. Fortunately, farmers have an increased access to credit services. The combined effect of...
Tipo: Conference Paper or Presentation
Palavras-chave: Liberalization; Intensification; Adoption; Maize; Africa; International Development; International Relations/Trade.
Ano: 2006
URL: http://purl.umn.edu/25419

MARKET OPPORUNITIES FOR AFRICAN AGRICULTURE: AN EXAMINATION OF DEMAND-SIDE CONSTRAINTS ON AGRICULTURAL GROWTH
Provedor de dados: 31
Autores: Diao,   Xinshen; Dorosh,   Paul A.; Rahman,   Shaikh Mahfuzur.
Rapid growth in the agricultural sector is central to any strategy for slashing poverty and hunger on the African continent. Yet investments aimed at increasing agricultural productivity need to be linked to market opportunities if they are not to depress commodity prices and farm incomes. It is widely perceived that high market transaction costs, weak domestic consumer demand, and lack of export possibilities are major constraints on agricultural growth prospects for Africa. But just how severe are these constraints, and what can be done to enhance market opportunities to enable agriculture to become a more powerful engine of growth for the continent?   This study addresses these questions. It concludes that non-traditional exports have the fewest...
Tipo: Working or Discussion Paper
Palavras-chave: International Development; International Relations/Trade.
Ano: 2003
URL: http://purl.umn.edu/16169

Market Prospects for Upland Crops in Indonesia
Provedor de dados: 31
Autores: Gunawan,   Memed.
This book analyzes domestic demand and market potential for major food and industrial commodities, cassava, maize, soybean, and sweet potato. The study sets forth long term trends in the dietary pattern of the Indonesian people. The study gives in-depth analysis of emerging markets for various kinds of fruit and vegetables. It gives a clear account of the relation between public and private efforts in agri-industry in Indonesia over the last two decades.
Tipo: Report
Palavras-chave: Demand; Commodity markets; Markets; Upland crops; Crop Production/Industries; Demand and Price Analysis.
Ano: 1997
URL: http://purl.umn.edu/32674

Market Prospects for Upland Crops in Pakistan
Provedor de dados: 31
Autores: Akhtar,   Muhammad Ramzan.
This book analyzes domestic demand and market potential for major food and industrial commodities, maize, soybean, potato and rice. The study sets forth long-term trends in the dietary pattern of the Pakistan people. The study gives in-depth analysis of emerging markets for various kinds of fruit and vegetables. It gives a clear account of the relation between public and private efforts in agri-industry in Pakistan over the last two decades.
Tipo: Report
Palavras-chave: Demand; Commodity markets; Markets; Upland crops; Crop Production/Industries; Demand and Price Analysis.
Ano: 1997
URL: http://purl.umn.edu/32684

Market Prospects for Upland Crops in the Philippines
Provedor de dados: 31
Autores: Lantican,   Josefina M.
This book analyzes domestic demand and market potential for major food and industrial commodities, maize, soybean, cassava and banana. The study sets forth long-term trends in the dietary pattern of the Philippines people. The study gives in-depth analysis of emerging markets for cut flower, ubi, coconuts, guyabano, mango, papaya and passion fruit. The study gives a clear account of the relation between public and private efforts in agri-industry in Philippines over the last two decades.
Tipo: Report
Palavras-chave: Demand; Commodity markets; Markets; Upland crops; Crop Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/32708

Marketable Surplus and Price-Spread for Maize in Hamirpur District of Himachal Pradesh
Provedor de dados: 31
Autores: Chauhan,   S.K.; Chhabra,   Amit.
A study has been conducted on the production, marketed surplus, disposal channels, margins and price-spread for maize cultivation in the Hamirpur district of Himachal Pradesh. A multi-stage stratified sampling technique has been used to select the sample of blocks (2), villages (10) and maize growers (120) for the year 2001-02. The study on factors affecting marketed surplus, and cost &amp; margins in the marketing of maize has revealed that farm-level marketable surplus is comprised of 53.21 per cent of the total production. The practices of storing maize for sometime and selling at a later date for higher price have led to storage losses to the extent of 0.16 quintal (2.80% of marketable surplus). Much of the marketable surplus of maize (66.92%) was...
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy.
Ano: 2005
URL: http://purl.umn.edu/58412

Marketing Policy Options for Consumer Price Mitigation Actions in the 2008/09 Maize Marketing Season in Zambia.
Provedor de dados: 31
Autores: Chapoto,   Antony; Haggblade,   Steven; Shawa,   Julius J.; Jayne,   Thomas S.; Weber,   Michael T.
1) Maize prices are rising rapidly in 2008 and are fast approaching import parity levels. 2) Maize traders, millers and farmers all agree that Zambia will likely require imports by early 2009 in order to avoid domestic maize supply shortages. 3) Official food balance sheets appear to have underestimated the demand for maize this year. They may also have slightly overestimated the size of the 2007/08 maize crop. Hence the slow government recognition of the need for maize imports. 4) As of late September 2008, neither the Government of Zambia (GRZ) nor the private sector have arranged to import maize from South Africa. Trade sources suggest informal imports from Tanzania are helping to relieve the likely shortfall. 5) Zambian policy makers face a delicate...
Tipo: Report
Palavras-chave: Food security; Food policy; Zambia; Maize; Marketing; Crop Production/Industries; Q20.
Ano: 2008
URL: http://purl.umn.edu/54638

Markets Access, Approaches and Opportunities for Quality Protein Maize Products
Provedor de dados: 31
Autores: Ouma,   James Okuro; Bett,   Charles; Githaigah,   T.
Lack of access to nutritious food is an underlying and major cause of child mortality in Africa. Improving the nutritional quality of food crops, through biofortification, would be a useful complementary strategy to other agricultural and public health interventions. Quality Protein Maize (QPM) varieties have been developed through biofortification. Consumption of these varieties leads to greater protein utilisation in adults and children. In Kenya three QPM varieties have been released. In Central Kenya, particularly Kirinyaga district, farmers have come together through Innovation Platform for Technology Adoption ( IPTA) with the aim of production, value addition and marketing of QPM based products. These groups require information on the potential...
Tipo: Journal Article
Palavras-chave: Market; Products; Quality Protein Maize; Rapid market appraisal; Crop Production/Industries; Marketing.
Ano: 2010
URL: http://purl.umn.edu/96173

Markets Need Predictable Government Actions to Function Effectively: The Case of Importing Maize in Times of Deficit
Provedor de dados: 31
Autores: Nijhoff,   Jan J.; Jayne,   Thomas S.; Mwiinga,   Billy; Shaffer,   James D.
Food relief for vulnerable groups is important in times of deficit. For the remainder  of the population, well functioning grain markets can save lives during times of food shortfalls.  This note illustrates how predictable Government behavior in the market can improve markets’  ability to meet the needs of consumers.
Tipo: Report
Palavras-chave: Food security; Food policy; Zambia; Maize; Agricultural and Food Policy; Marketing; Q18.
Ano: 2002
URL: http://purl.umn.edu/54609

Mass selection for early maturity in Thai composite-1
Provedor de dados: 106
Autores: Wiroreno, Otjo W.
1 ill., 2 tables
Palavras-chave: Corn; Maize; Mass selection; Early maturity; Thai composite no.1; Plant breeding; ข้าวโพด; การคัดเลือกแบบคัดรวม; พันธุ์เบา.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3782

Material flow determination through agricultural machinery management
Provedor de dados: 63
Autores: Romanelli,Thiago Libório; Milan,Marcos.
The approach of material embodiment in agricultural production systems is important because it determines the convergence of inputs (indirectly, the natural resources) to the field. Additionally, material flow is the basis for both environmental (energy analysis, emergy synthesis, life-cycle analysis and carbon inventories) and economical analyses. Since different materials cannot compose a single index, generally these flows are not shown, making comparisons among approaches difficult. Another aspect that makes comparisons difficult is the definition of the boundary of the studied system. If these boundaries differ, results will also be different, hiding actual distinctions among systems. The present study aims to suggest an arrangement of existing models...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: LCA; Material embodiment; Environmental management; Mechanization.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000400001

Maturity in corn in relation to yield
Provedor de dados: 106
Autores: Hakim, Rusli; Dahlan, Marsum.
1 ill., 3 tables
Palavras-chave: Corn; Maize; Yields; Maturity; ข้าวโพด; ผลผลิต; การเจริญเติบโต.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3893

Mean components for choosing maize populations to extract inbred lines
Provedor de dados: 64
Autores: Resende,Ewerton Lélys; Pinho,Renzo Garcia Von; Silva,Eric Vinicius Vieira; Massitela,João Júlio; Souza,Vander Fillipe de; Souza,João Lucas Dias.
ABSTRACT The choice of germplasm is one of the most important phases of a genetic improvement program to the fact that it is the initial development stage of superior hybrids. Hence, the objectives of this study were to obtain the estimates of m+a and d, and inbreeding depression for grain yield and plant height traits, for cultivars lacking this information, and thus to predict the potential of maize hybrids for the extraction of lines. The F1 and F2 generations of 12 maize hybrids were tested at two sites, during the crop years of 2017-18 and 2018-19, accounting for four environments. Both the generations were evaluated in contiguous experiments in randomized blocks design with three and two repetitions during the years 2017-18 and 2018-19, respectively....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; L. heterosis inbreeding depression.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100243

Measurement of microbial numbers, activity, biomass and diversity as a response to different methods of treatment of Tanzanian soil
Provedor de dados: 21
Autores: Grimsby, Lars Kåre.
Microbial biomass, numbers, activity and diversity were measured in tropical agricultural soil in Tanzania throughout the growth season of maize (Zea maize). Four farmers each had three plots that were subject to three different methods of treatment to improve soil fertility: 1) Removal of plant residues and other organic material, tilling to 10 cm, and adding nitrogen (60 kg pr ha) and phosphorus (40 kg pr ha). 2) Tilling organic plant material, such as maize residues, 10 cm into the soil, without adding fertilizer. 3) Collecting residues in heaps and burning them. No added fertilizer and no tillage. During the growth season, the total biomass and activity of the microflora increased as a response to higher soil water levels due to the rainy season. The...
Tipo: Thesis
Palavras-chave: Weed management; Soil biology; Soil tillage.
Ano: 2005
URL: http://orgprints.org/10378/1/150107_LKG_thesis.pdf

Measuring food quality: concepts, methods and challenges
Provedor de dados: 21
From 12 to 14 February, the Louis Bolk Instituut organised the 3rd annual QLIF workshop, titled "Measuring food quality, concepts, methods and challenges”. During these days a diverse and intensive program was presented. Participants came from, Belgium, Bulgaria, Germany, Greece, Hungary, Macedonia, Poland, Turkey.  Participants were all very enthusiastic, both on the quality of the presentations and the total program. For all those of you who missed it, I give a brief impression.    On the first day definitions of food quality were discussed as well as the methods to measure this quality. Machteld Huber explained the inner quality concept, developed by the Louis Bolk Instituut. This inner quality concept is based on two main life processes in organisms;...
Tipo: Proceedings
Palavras-chave: Food security; Food quality and human health Education; Extension and communication.
Ano: 2007
URL: http://orgprints.org/13200/2/Proceedings_2007.pdf

Measuring food quality: concepts, methods and challenges - Proceedings seminar February 2007
Provedor de dados: 21
From 12 to 14 February, the Louis Bolk Instituut organised the 3rd annual QLIF workshop, titled “Measuring food quality, concepts, methods and challenges”. During these days a diverse and intensive program was presented. Participants came from, Belgium, Bulgaria, Germany, Greece, Hungary, Macedonia, Poland, Turkey.  Participants were all very enthusiastic, both on the quality of the presentations and the total program. For all those of you who missed it, I give a brief impression.    On the first day definitions of food quality were discussed as well as the methods to measure this quality. Machteld Huber explained the inner quality concept, developed by the Louis Bolk Instituut. This inner quality concept is based on two main life processes in organisms;...
Tipo: Proceedings
Palavras-chave: Food security; Food quality and human health.
Ano: 2007
URL: http://orgprints.org/10664/1/1887.pdf

Measuring Integration and Efficiency in Maize Grain Markets: The Case of South Africa and Mozambique
Provedor de dados: 31
Autores: Traub,   Lulama Ndibongo; Myers,   Robert J.; Jayne,   Thomas S.; Meyer,   Ferdinand H.
Price transmission between the South African market and other regional markets is not as straightforward, despite South Africa’s role of a surplus producer for the region. There appears to be a host of local factors that must be taken into account in order to anticipate the likely level of regional food prices. This article assesses the degree of market integration and the speed of price adjustment to spatial price differentials between the SAFEX maize price in South Africa and maize grain and maize meal prices in Maputo, Mozambique. The findings of this study indicate that under certain trading regimes, there is no evidence of a long-run relationship between Mozambican and South African maize grain prices. This implies that any large deviations, within...
Tipo: Journal Article
Palavras-chave: Price transmission; Market integration; Cointegration; Trade regimes; Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/96644

Measuring Market Integration in Mozambican Maize Markets: A Threshold Vector Error Correction Approach
Provedor de dados: 31
Autores: Alemu,   Zerihun Gudeta; Biacuana,   G.R.
The primary objective of this research was to measure the extent of market integration between major surplus and deficit maize markets in Mozambique namely, Chimoio-Maputo, Chimoio-Beira, Ribaue-Nampula, and Mocuba-Nampula. To achieve this objective, Threshold Vector Autoregressive models were applied. The choice of the model was motivated by unobservable transaction costs and the import ant influence that their presence may exert on equilibrium spatial price relationships. The following are some of the major findings of the study. Firstly, threshold values (i.e. estimates of transaction costs) are found to be correlated positively with distance and inversely with the condition of the roads connecting markets. Secondly, market integration analysis revealed...
Tipo: Conference Paper or Presentation
Palavras-chave: Mozambique; Market integration; Maize market; Transaction cost; Threshold vector error correction; Crop Production/Industries; Marketing; C21; C22; D4; E3; Q13.
Ano: 2006
URL: http://purl.umn.edu/25657

Measuring the economic value of redistributing parasitoids for the control of the maize stemborer Busseola fusca Fuller (Lepidoptera: Noctuidae) in Kenya
Provedor de dados: 31
Autores: Kipkoech,   Anderson Kipruto; Schulthess,   Fritz; Yabann,   Wilson K.; Kipsat,   Mary J.; Mithofer,   Dagmar.
This study assesses the ex ante economic impact of the establishment of two parasitoids, the scelionid egg parasitoid Telenomus isis Polaszek from West Africa and a virulent strain of the braconid larval parasitoid Cotesia sesamiae Cameron from western Kenya, to control stemborer. Using a Cobb-Douglas production function, it was estimated that yields increased by 28.5% when pesticides were used to control stemborers. The benefit-cost ratio after the establishment of the parasitoids ranged from 1:1 to 777:1, with a net present value of up to US$192 million. The study demonstrates the potential of redistributing parasitoids indigenous to Africa for the control of African stemborers. Because the benefits of biological control are positively scale dependent,...
Tipo: Journal Article
Palavras-chave: Biological control; Economic valuation; Maize; Stemborers; Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/93864

Measuring the Impact of Public and Private Assets on Household Crop Income in Rural Mozambique, 2002-2005
Provedor de dados: 31
Autores: Mather,   David; Donovan,   Cynthia; Boughton,   Duncan.
This brief summarizes detailed analysis of the determinants of household crop income in rural Mozambique from 2002 to 2005. Increased crop income is associated with increases in household land area, use of animal traction, crop diversification into tobacco or cotton, access to market price information, and access to extension agents (for tobacco/cotton growers). Decreases in crop income are associated with drought. Results demonstrate that there are both public and private investments that can enhance farmers’ ability to increase crop income and avoid losses. Priority investments include: development and dissemination of drought-resistant varieties for maize and cassava, conservation farming, animal traction, market information, access to high-value crops...
Tipo: Working or Discussion Paper
Palavras-chave: Agriculture; Africa; Mozambique; Food security; Assets; Household; Rural; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Food Security and Poverty; International Development; Q12.
Ano: 2009
URL: http://purl.umn.edu/56805

Measuring the Price Volatility of Certain Field Crops in South Africa using the ARCH/GARCH Approach
Provedor de dados: 31
Autores: Jordaan,   Henry; Grove,   Bennie; Jooste,   Andre; Alemu,   A.G.
The conditional volatility in the daily spot prices of the crops traded on the South African Futures Exchange (yellow maize, white maize, wheat, sunflower seed and soybeans) is determined.  The volatility in the prices of white maize, yellow maize and sunflower seed have been found to vary over time, suggesting the use of the GARCH approach in these cases.  Using the GARCH approach, the conditional standard deviation is the measure of volatility, and distinguishes between the predictable and unpredictable elements in the price process.  This leaves only the stochastic component and is hence a more accurate measure of the actual risk associated with the price of the crop.  The volatility in the prices of wheat and soybeans was found to be constant over...
Tipo: Journal Article
Palavras-chave: Price volatility; Field crops; SAFEX; Time series analysis; ARCH/GARCH; Demand and Price Analysis.
Ano: 2007
URL: http://purl.umn.edu/8013

Mecanização da cultura do milho
Provedor de dados: 14
Autores: MANTOVANI, E. C.; CRUZ, J. C.; PEREIRA FILHO, I. A.
bitstream/item/30257/1/circ-11.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize.; Mecanização; Milho; Zea Mays.; Mechanization.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/485237

Mecanização do plantio simultâneo de milho e feijão consorciados.
Provedor de dados: 14
Autores: RAMALHO, M. A. P.; FINCH, E. O.; SILVA, A. F. da.
bitstream/item/37509/1/circ-7-2.ed.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize.; Agricultural equipment; Bean; Máquina; Equipamento agrícola; Milho; Feijão; Zea mays.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/895945

MECANIZAÇÃO na cultura do milho utilizando a tração animal.
Provedor de dados: 14
Semeadura e adubação do plantio; Controle de plantas daninhas; Adubação nitrogenada em cobertura; Principais pragas e seu controle; Consórcio milho e feijão; Atrelamento de animais; Alimentação de animais de tração; Características do animal de tração.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize; Animal traction.; Mecanização; Milho; Tração Animal.; Corn.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/472806

Mechanical damage for local design machine on maize cultivars of CA and GO
Provedor de dados: 111
Autores: Alwan, salih kadhim.
The effect of  rotational speed in shelling machine (LMS type) on maize cultivars of Cadiz (CA) and Golden (GO) were tested during shelling at three rotational speed of 300,400 and 500rpm . The experiments were carried out in a factorial experiment under complete randomized design with three replications. The results showed that the CA cultivar was significantly better than the GO in all studied conditions. The results showed a shelling productivity of 1.354 and 1.303 t\h, power consumption of 8.725 and 9.174 kW, shelling efficiency of 84.857% and 82.857%, unshelled grains of 1.260 and1.509% ,loose grains at kernel outlet of 1.444 and 1.612 %, grains damage of 1.546 and 1.805% and grain cleanliness of 90.828 and 90.148 % broken maize  of 3.777 % and 4.335...
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5393

Mechanical Weed Control in Maize
Provedor de dados: 21
Autores: Alföldi, Thomas; Taramarcaz, Josy.
The video shows a demonstration of new, powerful and relatively expensive machines (therefore suitable for joint use or contractors) that are doing excellent work; but there are also very useful lighter, classic, well-adjusted machines that are sometimes supplemented with new features (e.g. rotary weeders).
Tipo: Practice tool
Palavras-chave: Production systems Cereals; Pulses and oilseeds Buildings and machinery Weed management.
Ano: 2013
URL: http://orgprints.org/30999/1/video.php_y%3Dhttps_%252F%252Fwww.youtube.com%252Fwatch_v%3DBD2m8Sg13pw

Mechanization of dairy farming in Bangladesh
Provedor de dados: 111
Autores: Das, Ashish Kumar; Saha, Chayan Kumer; Alam, Md. Monjurul.
The mechanization status of dairy farming in Bangladesh is not mentionable. In every steps of the farming operation, indigenous systems have been practiced in most of the farms. This study has been conducted to assess mechanization status in dairy farming. The selected areas of this study were Bangladesh Agricultural University (BAU) dairy farm, Mymensingh, Rural Development Academy (RDA) dairy farm, Bogra and four small, four medium and two large farms in Sirajganj district. Most mechanized RDA dairy farm and rest of the non-mechanized farms were selected for this study. The field survey was conducted by interviewing identified sample respondents with pre-determined interview schedules to cover all selected locations. Most of the farms have no specific...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering; Farm Power and Machinery mechanization  dairy farm  waste disposal  ventilation  manger  gutter.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3895

Medição do Impacto dos Bens Públicos e Privados sobre os Rendimentos Familiares Provenientes de Culturas em Moçambique Rural, 2002-2005
Provedor de dados: 31
Autores: Mather,   David; Donovan,   Cynthia; Boughton,   Duncan.
This brief summarizes detailed analysis of the determinants of household crop income in rural Mozambique from 2002 to 2005. Increased crop income is associated with increases in household land area, use of animal traction, crop diversification into tobacco or cotton, access to market price information, and access to extension agents (for tobacco/cotton growers). Decreases in crop income are associated with drought. Results demonstrate that there are both public and private investments that can enhance farmers’ ability to increase crop income and avoid losses. Priority investments include: development and dissemination of drought-resistant varieties for maize and cassava, conservation farming, animal traction, market information, access to high-value crops...
Tipo: Working or Discussion Paper
Palavras-chave: Agriculture; Africa; Mozambique; Food security; Assets; Household; Rural; Agricultural and Food Policy; Community/Rural/Urban Development; Consumer/Household Economics; Food Security and Poverty; International Development; Q12.
Ano: 2009
URL: http://purl.umn.edu/56804

Meiotic behavior of economically important plant species: the relationship between fertility and male sterility
Provedor de dados: 74
Autores: Pagliarini,Maria Suely.
Meiosis is an event of high evolutionary stability which culminates in a reduction of chromosome number. The normal and harmonious course of meiosis ensures gamete viability. The cytologic events of gametogenesis are controlled by a large number of genes that act from premeiotic to postmeiotic mitosis. Mutations in these genes cause anomalies that may impair fertility, and many abnormalities affecting plant fertility or causing total male sterility have been detected during the evaluation of meiotic behavior in some species. Some of these abnormalities have been frequently described in the literature, while others have not been previously reported. The most frequent abnormalities found in the species analyzed were irregular chromosome segregation,...
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400045

Meiotic study of Zea mays ssp. mays (2n = 40) x Tripsacum dactyloides (2 n = 72) hybrid and its progeny
Provedor de dados: 69
Autores: Molina,María del Carmen; García,María Dina; Chorzempa,Silvia Elena.
Maize (2n = 40) x Tripsacum dactyloides (2n = 72) F1 hybrid plants (2n = 56) were obtained by embryo rescue and induction of somatic embryogenesis/organogenesis. Hybrid plants showed Tripsacum-like phenotypes, tolerance to stresses such as NaCl salinity and low temperatures. The more frequent meiotic configurations were 28II (24%), 24II + 2IV (19%) and 26II + 1IV (12%), with an average per cell of 0.55I + 25.18II + 1.19IV. Significant differences between plants were not observed. Pollen fertility ranged from 0% to 50%. After pollination with maize or Tripsacum, 20% of F1 plants have developed viable seeds, which originated the progeny. Thirty five percent of the progeny showed 2n = 56 chromosomes and F1 like-phenotypes, which suggests they have apomictic...
Tipo: Journal article
Palavras-chave: Chromosome number; Corn; Eastern gamagrass; Remote hybridisation.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300020

Mejoramiento de maíz con calidad de proteína (QPM): Protocolos para generar variedades QPM
Provedor de dados: 31
Autores: Vivek,   B.S.; Krivanek,   A.F.; Palacios-Rojas,   N.; Twumasi-Afriyie,   S.; Diallo,   Alpha O.
Tipo: Report
Palavras-chave: Zea mays; Fitomejoramiento; Métodos fitotécnicos; Recursos genéticos; Calidad de proteína; Contenido de proteína; Métodos de aplicación; Lisina; Triptófano; Componentes de los alimentos; Crop Production/Industries; F30; Q04.
Ano: 2008
URL: http://purl.umn.edu/56178

Melhoramento genético do milho no Território Federal de Roraima.
Provedor de dados: 14
Autores: BARRIGA, R. H. M. P.; RIBEIRO, P. H. E.; ALVES, A. A. C.
bitstream/item/59817/1/CPATU-PA43.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Roraima; Brasil; Maize.; Milho.; Melhoramento Genético Vegetal; Amazonia; Plant breeding.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/378089

Melhoramento vegetal participativo com ênfase na eficiência nutricional.
Provedor de dados: 14
Autores: MACHADO, A. T.; MACHADO, C. T. de T.
ABSTRACT: Participatory plant breeding uses a concept that joint formal (official researches institutions) and informal sector (farmers communities), combining the capabilities and the knowledge of both, and farmer's experiences, practices, and preferences. The goal is to join the yield improvement exploring the availabel farmer's agrobiodiversity and introduction new sources of genetic materials. Another goal is to develop the farmer's capability to select and to interchange seeds. Generally, participatory breeding has been used in areas under stress conditions. These areas are usually related with agriculture of subsistence, where farmer's do not have funds to buy seeds, fertilizers, and pesticides. Small farmers need varieties adapted to their specific...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Maize.; Genética Vegetal; Melhoramento Genético Vegetal; Milho; Produtividade; Variedade; Zea Mays.; Crop yield; Genetics; Plant breeding; Varieties.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568937

Methane production of two roughage and total mixed ration as influenced by cellulase and xylanase enzyme addition
Provedor de dados: 63
Autores: Gemeda,Belete Shenkute; Hassen,Abubeker.
In recent decades supplementation of animal feeds with exogenous fibrolytic enzymes has substantially improved digestibility and animal performance. However, information related to associated methane production is limited and inconsistent. This study evaluated the effect of cellulase and xylanase enzymes on in vitro methane production of Eragrostis curvula hay, maize (Zea mays) stover and a total mixed ration (TMR) at seven levels of the two enzymes. Feed samples were incubated for 2, 12, 24 and 48 h in an in vitro batch culture with buffer and rumen fluid, and fibrolytic enzymes. Gas production was measured using a pressure transducer connected to a data tracker, while methane gas was analysed using a gas chromatograph which was calibrated with standard...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestibility; Fermentation; Fibrolyitc enzymes; Gas production.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000100011

Methodenvergleich zur Entwicklung von optimalen Maissorten (Populations- und Hybridsorten) für den Ökologischen Landbau
Provedor de dados: 21
Autores: Burger, Henriette; Schmidt, Walter; Geiger, Hartwig H.
Problemstellung:  Der Ökologische Landbau hat in den letzten Jahren in Deutschland zugenommen. Die Versorgung mit Saatgut, das dafür geeignet ist, gewinnt deshalb verstärkt an Bedeutung.   Die Ziele waren: Optimierung der Selektionsstrategie zur Entwicklung von Maissorten mit spezieller Anpassung an die Bedingungen des Ökologischen Landbaus; Entwicklung neuer Sorten (Populations- und Hybridsorten) für den Ökologischen Landbau; Erschließung genetischer Ressourcen für den Ökologischen Landbau, insbesondere aus Landsorten, die auf Low-Input-Eignung vorgeprüft wurden.  Durchführung: In den Jahren 2004 bis 2006 wurde die Leistung von Testkreuzungen, Experimentalhybriden und neu entwickelten Populationssorten vergleichend unter ökologischen und konventionellen...
Tipo: Report
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2006
URL: http://orgprints.org/16714/1/16714%2D03OE651%2Dkws%2Dburger%2D2006%2Dmaissorten.pdf

Methodenvergleich zur Entwicklung von optimierten Maissorten (Populations- und Hybridsorten) für den ökologischen Landbau (Verbundvorhaben)
Provedor de dados: 21
Das hier beschriebene Projekt ist Teil eines Verbundvorhabens, das folgende Teilprojekte umfasst: FKZ 03OE651/1, FKZ 03OE651/2.   Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/cgi/saved_search?savedsearchid=1242.   Eine wesentliche Grundlage für die Stärkung der Position des ökologischen Landbaus bildet die Versorgung der Anbauer mit einem Sortenspektrum, das optimal an die pflanzenbaulichen Bedingungen dieser Wirtschaftsweise angepasst ist. Einen ersten Ansatz dazu bildet das Projekt des Deutschen Mais Komitees– (DMK): „Prüfung und Empfehlung von Maissorten für den Öko-Landbau“. In diesem Projekt werden bei der Evaluierung von Sorten, welche...
Tipo: Project description
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2023

Methodenvergleich zur Entwicklung von optimierten Maissorten (Populations- und Hybridsorten) für den ökologischen Landbau (Verbundvorhaben)
Provedor de dados: 21
Das hier beschriebene Projekt ist Teil eines Verbundvorhabens, das folgende Teilprojekte umfasst: FKZ 03OE651/1, FKZ 03OE651/2.   Alle in Organic Eprints archivierten Projektbeschreibungen und Veröffentlichungen zu diesem Verbundvorhaben finden Sie unter folgendem Link: http://orgprints.org/cgi/saved_search?savedsearchid=1242.   Eine wesentliche Grundlage für die Stärkung der Position des ökologischen Landbaus bildet die Versorgung der Anbauer mit einem Sortenspektrum, das optimal an die pflanzenbaulichen Bedingungen dieser Wirtschaftsweise angepasst ist. Einen ersten Ansatz dazu bildet das Projekt des Deutschen Mais Komitees– (DMK): „Prüfung und Empfehlung von Maissorten für den Öko-Landbau“. In diesem Projekt werden bei der Evaluierung von Sorten, welche...
Tipo: Project description
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2023

Metodologías de Estimación de Rendimientos en el Programa de Producción Agrícola : el caso del PRONESPRE en 2004-2006 en el Estado de México
Provedor de dados: 32
Autores: Serrano Carrillo, Esteban Justino.
En el Estado de México, en los últimos años el problema principal que enfrentan tanto las dependencias federales y estatales del sector agropecuario, es la carencia de  información real  sobre el medio rural y específicamente sobre la superficie sembrada de maíz y el volumen de producción que se obtiene; lo que  origina una falta de elementos para la planeación. Por ello los objetivos de esta tesis es desarrollar y difundir la importancia que tienen los Sistemas de Información Geográfica (SIG) en los pronósticos de estimación de rendimiento y producción, recordando que la predicción de cosecha permite tomar decisiones razonables para el manejo de excedentes de producción, cupos de importación, orientación de apoyos a la comercialización y asistencia a...
Tipo: Tesis
Palavras-chave: Instituciones; Metodologías; Apoyos; Resultado y  Desarrollo; Maestría; Gestión del Desarrollo del Territorio Rural; Institutions; Methodologies; Supports; Result and Development.
Ano: 2008
URL: http://hdl.handle.net/10521/1638

Métodos de controle de plantas daninhas na cultura do algodoeiro (Gossypium hirsutum, marie galante, Hutch) nos Estados da Paraíba e Rio Grande do Norte: informações gerais.
Provedor de dados: 14
Autores: BELTRÃO, N. E. de M.; AZEVEDO, D. M. P. de.
Definicao dos metodos de controle de plantas daninhas; Vantagens e desvantagens do metodo quimico; Requerimentos basicos para utilizacao do metodo quimico; Calibragem propriamente dita; Recomendacoes tecnicas.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Controle; Arboreo; Consorciacao; Caupi; Phaseolus vulgares; Weed; Perennial cotton; Control; Maize; Cowpea; Brasil; Rio Grande do Norte; Paraiba.; Algodão; Feijão; Erva Daninha; Gossypium Hirsutum; Milho; Zea Mays.; Intercropping.
Ano: 1979
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/262422

Métodos de desinfestação superficial para obtenção de sementes de milho livres de microrganismos.
Provedor de dados: 14
Autores: DRECHSEL, M. M.; BALDANI, V. L. D.
Método 1 - Peróxido de hidrogênio (H2O2) (Montarroyos, 2000); Método 2 - Hipoclorito acidificado (Pinheiro, 1992); Método 3 - Etanol absoluto; Método 4 - Calor seco; Método 5 - Tratamento térmico; Método 6 - Exposição à radiação ultravioleta.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Maize.; Milho.; Microrganismo.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/629227

Microbial Community Structure and Litter Decomposition in Stratified Soils of a Long Term Reduced Tillage Experiment
Provedor de dados: 21
Autores: Suhadolc, M.; Baškovč, M.; Kaurin, A.; Kastelec, D.; Mihelič, R.
The aim of the present study was to examine decomposition of plant material (maize straw, green and rooibos tea) in stratified soils of the long-term tillage experiment, established in 1999 and shifted from conventional to organic farming system in 2015.    The plowing in conventional tillage (CT) has been done by moldboard plow 20 cm deep, while in minimum tillage (MT), soil disturbance has been up to 10 cm deep by a Special disc harrow. More than 15 years of long term Minimum tillage, with reduced soil disturbances and improved residue management, resulted in stratification of soil organic carbon and nutrients with highest concentrations in the very topsoil.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Soil biology; Specific methods.
Ano: 2017
URL: http://orgprints.org/32682/1/Suhadolc_Bageco-2017_FertilCrop_poster2.pdf

Microbial response of soils with organic and conventional management history to the cultivation of Bacillus thuringiensis (Bt)-maize under climate chamber conditions
Provedor de dados: 21
Autores: Fliessbach, Andreas; Nietlispach, Bruno; Messmer, Monika; Rodríguez-Romero, Ana-Sue; Mäder, Paul.
An experiment was carried out in a climate chamber to analyse if Bt-maize may cause particular changes in soils with different levels of microbial biomass and activity due to long-term management history. Among the soils selected, the ones managed organically for 30 years exhibited twice the microbial biomass and 2.6 times the dehydrogenase activity (DHA) of the soil from a field with long-term conventional maize monoculture. Soils were cultivated twice in a row with Bt-maize, its near-isogenic line and a conventional breeding line. We tested the hypotheses that (a) soil microbial biomass and activity are affected by the cultivation of Bt-maize and that (b) the influence of Btmaize depends on the level of soil microbial biomass and activity. Shoot and root...
Tipo: Journal paper
Palavras-chave: Soil.
Ano: 2013
URL: http://orgprints.org/25983/1/Fliessbach_et_al_2013_BFSa.pdf

Microbial response of soils with organic and conventional  management history to the cultivation of Bacillus  thuringiensis (Bt)-maize under climate chamber conditions
Provedor de dados: 21
Autores: Fließbach, Andreas; Nietlispach, Bruno; Messmer, Monika; Rodríguez- Romero, Ana-Sue; Mäder, Paul.
An experiment was carried out in a climate chamber to analyse if Bt-maize may cause particular changes in soils with different levels of microbial biomass and activity due to long-term management history. Among the soils selected, the ones managed organically for 30 years exhibited twice the microbial biomass and 2.6 times the dehydrogenase activity (DHA) of the soil from a field with long-term conventional maize monoculture. Soils were cultivated twice in a row with Bt-maize, its near-isogenic line and a conventional breeding line. We tested the hypotheses that (a) soil microbial biomass and activity are affected by the cultivation of Bt-maize and that (b) the influence of Bt-maize depends on the level of soil microbial biomass and activity. Shoot and...
Tipo: Journal paper
Palavras-chave: Soil biology.
Ano: 2013
URL: http://orgprints.org/23134/1/Fliessbachetal-2013-BiolFertilSoils-published-online.pdf

Microbial soil quality indicators under different crop rotations and tillage management
Provedor de dados: 124
Autores: Ferreira,Enderson Petrônio de Brito; Santos,Henrique Pereira dos; Costa,Janaina Ribeiro; De-Polli,Helvécio; Rumjanek,Norma Gouvêa.
An experiment was carried out under field conditions to assess the effects of soil management (no-tillage- NT and conventional tillage- CT) and crop rotation systems on microbial biomass-C (Cmic), basal soil respiration (BSR), metabolic quotient (qCO2), soil organic carbon content (Corg) and microbial carbon to organic carbon ratio (Cmic/Corg). Soil samples were collected on an area cultivated with wheat as winter crop and soybean as summer crop, both in rotation with vetch, maize and oats. Samples were also collected in a secondary forest used as reference. Data of each management system (NT and CT) were compared to forest area by "t" test (p&lt;0.05) and crop rotations were compared by Tukey test (p&lt;0.05). All data were submitted to multivariate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microbial biomass; Microbial respiration; Organic matter; Soil management.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902010000200002

Microbiological and biochemical properties of an agricultural Mexican soil amended with sewage sludge
Provedor de dados: 90
Autores: Armenta,Renato; Vaca,Rocio; Lugo,Jorge; del Aguila,Pedro.
The application of sewage sludge is a concern because it may affect the quality of organic matter and microbiological and biochemical soil properties. The effects of surface application of sewage sludge to an agricultural soil (at 18 and 36 t ha-1 dry basis) were assessed in one maize (Zea mays L.) growing season. The study evaluated microbial biomass, basal respiration and selected enzymatic activities (catalase, urease, acid and alkaline phosphatase, and β-glucosidase) 230 days after sewage sludge application and infrared spectroscopy was used to assess the quality of dissolved organic matter and humic acids. Sewage sludge applications increased the band intensity assigned to polysaccharides, carboxylic acids, amides and lignin groups in the soil. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Basal respiration; Biosolids; Enzymatic activities; Metabolic quotient; Microbial biomass.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500029

Microbiological and chemical attributes of a Hapludalf soil with swine manure fertilization
Provedor de dados: 86
Autores: Couto,Rafael da Rosa; Comin,Jucinei José; Soares,Cláudio Roberto Fonsêca Sousa; Belli Filho,Paulo; Benedet,Lucas; Moraes,Marcel Pires de; Brunetto,Gustavo; Beber,Caetano Luiz.
The objective of this work was to evaluate the microbiological and chemical attributes of a soil with a seven‑year history of urea and swine manure application. In the period from October 2008 to October 2009, soil samples were collected in the 0-10 cm layer and were subjected to the treatments: control, without application of urea or manure; and with the application of urea, pig slurry, and deep pig litter in two doses, in order to supply one or two times the recommended N doses for the maize (Zea mays)/black oat (Avena strigosa) crop succession. The carbon of the microbial biomass (MB‑C) and the basal respiration (C‑CO2) were analyzed, and the metabolic (qCO2) and microbial quotient (qmic) were calculated with the obtained data. Organic matter, pH in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental quality; No‑tillage; Pig slurry; Soil quality; Swine production.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000700010

Micronutrients accumulation at different maize development stages
Provedor de dados: 64
Autores: Borges,Iran Dias; Von Pinho,Renzo Garcia; Pereira,José Luiz de Andrade Rezende.
The study of micronutrients accumulation as a function of plant development stage is of fundamental importance to subsidize strategies for fertilizer application and minimum amount to maintain soil fertility. This study evaluated micronutrient accumulation in two maize cultivars at different development stages. The experimental design was randomized blocks with four replications in split-plots, with two maize hybrids as the plots and sampling time according to development stages as sub-plots. Maize accumulated minimum amounts of B, Cu, Mn, and Zn in the initial stages of development, and the maximum accumulated values were observed after 100 days seedling emergency. The evaluated hybrids accumulated maximum of Zn and Cu close to physiological maturity....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Accumulation; Nutrients; Cultivars.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000400011

Microsatellite-assisted backcross selection in maize
Provedor de dados: 74
Autores: Benchimol,Luciana Lasry; Souza Jr.,Cláudio Lopes de; Souza,Anete Pereira de.
A microsatellite marker (SSR) was chosen to simulate a target allele and three criteria (02, 04 and 06 markers per chromosome) were tested to evaluate the most efficient parameters for performing marker-assisted backcross (MAB) selection. We used 53 polymorphic SSRs to genotype 186 BC1 maize (Zea mays L.) plants produced by crossing the inbred maize lines L-08-05 (donor parent) and L-14-4B (recurrent parent). The second backcross (BC2) generation was produced with 180 plants and screened with markers which were not recovered from the first backcross (BC1) generation. A total of 480 plants were evaluated in the third backcross (BC3) generation from which 48 plants were selected for parental genotype recovery. Recurrent genotype recovery averages in three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Marker-assisted backcrossing (MAB); Marker-assisted selection; Microsatellites.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500022

Microsatellite-dense genetic map: towards genome coverage in a tropical maize (Zea mays L.) population
Provedor de dados: 88
Autores: Lima,Milena De Luna Alves; Souza Jr.,Cláudio Lopes de; Souza,Anete Pareira de.
Dense molecular genetic maps are used for an efficient quantitative trait loci (QTL) mapping and in the marker-assisted selection programs. A dense genetic map was generated with 139 microsatellite markers using 256 F2 plants generated by the crossing of two tropical maize inbred lines (L-02-03D and L-20-01F). This map presented 1,858.61 cM in length, where 10 linkage groups were found spanned, with an average interval of 13.47 cM between adjacent markers. Seventy seven percent of the maize genetic mapping bins were covered, which means an increase of 14% coverage in relation to the previous tropical maize maps. The results provide a more detailed and informative genetic map in a tropical maize population representing the first step to make possible the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dense genetic map; Genome coverage; Microsatellites; Tropical maize; Zea mays L.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000300009

Migration and Farm Efficiency: Evidence from Northern Thailand
Provedor de dados: 31
Autores: Nonthakot,   Phanin; Villano,   Renato A.
This paper investigates the relationship between labour migration and agricultural productivity in the Northern Province of Thailand. Drawing on maize production data from a household survey, we estimate a stochastic production function to evaluate the effects of migration, remittances and salient characteristics of migrants on the mean maize output and levels of technical efficiency. Evidence shows that remittances and number of migrant workers facilitate maize production. It was also found that remittances, duration of migration, gender and education of migrants enhance the productive capacity of maize farmers.
Tipo: Conference Paper or Presentation
Palavras-chave: Migration; Stochastic frontier; Technical efficiency; Maize; Thailand; Crop Production/Industries; Labor and Human Capital.
Ano: 2008
URL: http://purl.umn.edu/5981

Milho.
Provedor de dados: 14
Autores: SOUZA, F. R. S. de; BOTELHO, S. M.
bitstream/item/61707/1/Belem-RecBas3.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Cultivo; Armazenagem; Maize; Cultivation; Seed; Fertilizer.; Adubação; Milho; Semente; Zea Mays.; Storage.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383803

Milho.
Provedor de dados: 14
Autores: PEREIRA, O. G.
bitstream/item/152118/1/Comunicado6.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Belém; Pará; Brasil; Maize.; Milho; Melhoramento Genético Vegetal; Produtividade; Variedade.; Amazonia; Plant breeding; Varieties; Yields.
Ano: 1964
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/383214

Milho: A EMBRAPA atinge altas produtividades.
Provedor de dados: 14
Autores: RASSINI, J. B.
bitstream/item/120347/1/digitalizar0001.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: EMBRAPA; Zea mays L; Maize; Produtivity.; Milho; Produtividade.
Ano: 1990
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/43119

Milho: a Interação Y1 Y3 Y7 na coloração amarela do endosperma
Provedor de dados: 43
Autores: Graner,E. A.
This paper deals with the genetic interaction of Yl Y3 Y7 in producing yellow endosperm in maize. The new data presented are in accordance with preliminary notes on the same subject. The recessive yl, y3 and y7produce respectively green plants, albescent plants and white seedlings.
Tipo: Info:eu-repo/semantics/article
Ano: 1961
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761961000100002

Milho e girassol: opções de outono-inverno nos sistemas de produção de grãos no Mato Grosso do Sul.
Provedor de dados: 14
Autores: HECKLER, J. C.; FERNANDES, F. M.
bitstream/item/39603/1/COT40-98.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Cultura de outono-inverno; Mato Graosso do Sul; Brasil; Helianthus annus; Maize; Sunflower; Rotational cropping.; Cerrado; Girassol; Milho; Rotação de Cultura; Zea Mays.; Brazil.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/241133

Milho manchado e milho sem produção.
Provedor de dados: 14
Autores: FERNANDES, F. T.; OLIVEIRA, E. de.
bitstream/item/40566/1/Milho-manchado.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Maize; Disease.; Doença; Milho; Phaeosphaeria Maydis; Zea Mays.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/482982

MILHO para silagem: tecnologias, sistemas e custo de produção.
Provedor de dados: 14
Meio cultural do milho forrageiro; Nutricao e adubacao do milho forrageiro; Pragas da cultura do milho forrageiro; Sistemas importantes para melhor qualidade da silagem de milho e maior eficiencia na sua utilizacao; Sistemas de ensilagem; Analise economica de ensilagem de milho.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize; Grass; Production system.; Custo de Produção; Milho; Silagem; Sistema de Produção; Tecnologia.; Corn; Technology.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/472008

MILHO, sorgo e energia: programas de pesquisa.
Provedor de dados: 14
A breve resenha, que ora se faz, dos programas em andamento e de tecnoJogias já desenvolvidas pelo CNPMS, tem o proposito nao si de prestar contas, relativamente aos esforços que vem empreendendo e aos rumos que vem dando a seus programas de pesquisa, mas também de reconhecer subsidias que possibilitem ao CNPMS, cada vez mais, orientar suas pesquisas na direção dos problemas que realmente vêm comprometendo o desenvolvimento das culturas de milho e sorgo, da agricultura em geral e também dos problemas que dizem respeito ao uso da energia no Brasil. Além disto, busca antecipar-se, oferecendo ao agrícuitor brasileiroalternativas tecnica e economicamente viáveis, alem de socialmente desejaveis e que lhes possibilitem ajustar-se, rapidamente, a novas situacoes....
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Maize.; Energia; Milho; Programa de Pesquisa; Sorghum Bicolor; Sorgo; Zea Mays.; Energy; Research.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476685

Milho Suwan DMR: perspectivas da populacao melhoradas em Rondonia.
Provedor de dados: 14
Autores: SAMPAIO, N. F.
Resultado de pesquisa realizada pela EMBTRAPA-UEPAE Porto Velho, em melhoramento com a populacao de Suwan DMR, a partir de sementes da variedade BR-105, obtida pela EMBRAPA-CNPMS. Baseado em selecao massal estratificada, o material foi selecionado e testado em solos com fertilidade de mediana a boa, demonstrando bom potencial para a regiao. Com a populacao de primeiro ciclo de selecao, foi possivel constatar desempenho superior, em experimentos e testes na area de produtores, bem como, a boa receptividade obtida. Os resultados permitem programar o lancamento desta populacao melhorada, como a cultivar BR-5103.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Brasil; Rondonia; Maize; Advance.; Milho; Melhoramento; Zea Mays.; Brazil.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697968

Milk fatty acids in relation to feeding practices on Dutch organic farms
Provedor de dados: 21
Autores: de Wit, Jan; Wagenaar, Jan Paul; de Vries, Anneke; Baars, Ton.
Various recent studies have indicated positive interactions between organic animal production and poly-unsaturated fatty acids, particularly CLA and omega-3. In this paper, we present the monitoring results of 15 organic farms concerning the rela-tionship between feeding practices and fatty acid pattern. The results indicate a strong negative effect of maize and grass silage and concentrate feeding on CLA levels in milk fat. On the other hand, feeding fresh grass has a positive effect. Omega-3 levels in milk fat seem less related to feed characteristics: similar relations to those with CLA seem to exist, but feed composition explains the variation in omega-3 levels only to a limited extent, while there is a large farm influence. This might be related to...
Tipo: Conference paper, poster, etc.
Palavras-chave: Food security; Food quality and human health Dairy cattle.
Ano: 2006
URL: http://orgprints.org/7320/1/jan_de_witodense_papermilkdef.pdf

Mimosa caesalpiniifolia intercropping, weeds removal and nitrogen fertilization on maize
Provedor de dados: 75
Autores: Monteiro,Alex L; Silva,Paulo SL; Tavella,Leonardo B; Oliveira,Fábio HT; Silva,Paulo IB.
ABSTRACT: Weeding is expensive and laborious, and some weeds may re-establish themselves afterwards. Arboreal leguminous plants can control weeds, and fertilization with nitrogen can increases the competitive ability of the maize. The aim of this work was to evaluate the effects of weed-removal and intercropping with sabiá (Mimosa caesalpiniifolia) on control of weed plants and maize productivity. A randomized complete block design in a split-plot arrangement was used with five replications. Cultivar AG 105, fertilized with nitrogen (30 and 120 kg/ha of N applied to the plots) was subjected to the following treatments (subplots): A) no weeding; B) intercropping with sabiá (30 viable seeds/m2, broadcast between the rows of maize); C) hoeing {20 and 40 days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Green corn; Grain yield; Hoeing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000200175

Mischanbau von Silomais mit Stangenbohnen
Provedor de dados: 21
Autores: Nurk, Liina; Graß, Rüdiger; Hubert, Sabine; Pekrun, Carola; Wachendorf, Michael.
Im Ökologischen Landbau besteht ein steigendes Interesse am Silomaisanbau als wertvolles Futter in der Rinderfütterung bzw.als Substrat zur Verwertung in Biogasanlgen. Herkömmliche Maisanbausysteme verursachen oft Umwelt- und Anbauprobleme wie Bodenerosion, Unkrautkontrolle, mangelnde Nährstoffversorgung. Zur Reduzierung dieser Problematik wird seit 2013 in einem Feldversuch der Mischanbau von Silomais mit Stangenbohnen (Phaseolus vugaris) an der Universität Kassel-Witzenhausen untersucht. Die Ergebnisse des ersten Versuchsjahres erbrachten geringere Erträge der Mischanbauvarianten im Vergleich zum reinen Silomaisanbau. Die verwendete Bohnensorte war zur Silageernte im Herbst bereits zu weit abgereift und große Anteile der Biomasse war abgestorben bzw....
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions.
Ano: 2015
URL: http://orgprints.org/26888/1/26888_nurk.pdf

Mischanbau von Silomais mit Stangenbohnen Ergebnisse zu  Anbau und Vergärung
Provedor de dados: 21
Autores: Nurk, Liina; Graß, Rüdiger; Pekrun, Carola; Hubert, Sabine; Wachendorf, Michael.
Organic farmers show an increasing interest in cultivation of silage maize as valuable forage for cattle and for energetic utilization in biogas plants. Maize cultivation  systems are often characterized by environmental and cultivation problems like soil erosion, difficult weed control and poor nutrient supply. Aiming at a reduction of these problems a field experiment with mixture of maize and climbing beans (Phaseolus vulgaris) was carried out from 2013 to 2015 at the University of Kassel-Witzenhausen  (Hesse). Results showed lower yields of the mixture treatments compared with sole cropped maize. The chosen bean variety had an impact on the bean yield and later sown beans caused lower bean proportions. Furthermore, methane yields of maizebean silages...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Root crops.
Ano: 2017
URL: http://orgprints.org/31842/1/Mischanbau%20von%20Silomais%20mit%20Stangenbohnen%20-%20Ergebnisse.pdf

Mischsilierung von Mais mit Stangen- oder Feuerbohne aus ökologischem Anbau
Provedor de dados: 21
Autores: Höppner, Frank; Fischer, Jenny; Böhm, Herwart.
Mais mit Bohne im Gemenge bietet sich in Mischkultursystemen als Futtergrundlage für die Protein- und Energieversorgung landwirtschaftlicher Nutztiere an. Im Ökologischen Landbau werden beide Pflanzenarten bisher weniger verbreitet angebaut und es gibt kaum Erkenntnisse zur Siliereignung. Zur Prüfung des Silierverlaufes und der Silagequalität wurden Laborsilagen von Mais mit verschieden Bohnensorten als auch Mustermischsilagen für Fütterungsversuche erzeugt. Auch sollte der Einsatz eines biologischen Siliermittels den Silierprozess positiv unterstützen.
Tipo: Conference paper, poster, etc.
Palavras-chave: Pasture and forage crops Crop combinations and interactions Cereals; Pulses and oilseeds.
Ano: 2015
URL: http://orgprints.org/29592/1/H%C3%B6ppner-etal_2015_PflaTag_Silierung-Mais-Bohne.pdf

Mitigating effect of salicylic acid and nitrate on water relations and osmotic adjustment in maize, cv. Lluteño exposed to salinity
Provedor de dados: 118
Autores: Escobar,Hugo; Bustos,Richard; Fernández,Felipe; Cárcamo,Henry; Silva,Herman; Frank,Nicolás; Cardemil,Liliana.
We analyzed the mitigating effect of NO3 - and salicylic acid (SA) on the detrimental effects of salt stress by studying the water status of plants of maize grown in Hoagland's medium with NaCl 100 mM as the saline component, to which SA and NO3 - were added in different concentrations as mitigating agents. We evaluated water potential &amp;#936;w, osmotic potential &amp;#936;s, relative water content (RWC), turgor potential (&amp;#936;p ), and the osmotic adjustment (OA) of leaves and roots. SA 0.5 mM mitigated the effects of salinity by increasing the &amp;#936;w of the leaf, the &amp;#936;sof theroot, the &amp;#936;pof the leaf, RWC and OA of the leaf; while NO3 was only effective in combination with SA, mitigating the effects of salinity by increasing...
Tipo: Journal article
Palavras-chave: Nitrate; Osmotic potential; Osmotic adjustment; Salinity mitigation; Salicylic acid; Water potential; Water relative content.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000300006

Mitigating the impact of El Nino-related drought on smallholder farmers in Central Sulawesi, Indonesia: An interdisciplinary modelling approach combining linear programming with stochastic simulation
Provedor de dados: 31
Autores: Keil,   Alwin; Teufel,   Nils; Gunawan,   Dodo; Leemhuis,   Constanze.
Crop production in the tropics is subject to considerable climate variability caused by the El Niño-Southern Oscillation (ENSO) phenomenon. In Southeast Asia, El Niño causes comparatively dry conditions leading to substantial declines of crop yields with severe consequences for the welfare of local farm households. Using a modelling approach that combines regression analysis with linear programming and stochastic simulation, and integrates climatic and hydrologic modelling results, the objective of this paper is to assess the impact of El Niño on agricultural incomes of smallholder farmers in Central Sulawesi, Indonesia, and to identify suitable crop management strategies to mitigate the income depressions. The results contribute to the formulation of...
Tipo: Conference Paper or Presentation
Palavras-chave: ENSO; Risk management; Linear programming; Stochastic simulation; Indonesia; Farm Management.
Ano: 2007
URL: http://purl.umn.edu/7942

Mitodepressive and clastogenic effects of aqueous extracts of the lichens Myelochroa lindmanii and Canoparmelia texana (Lecanorales, Parmeliaceae) on meristematic cells in plant bioassays
Provedor de dados: 74
Autores: Campos,José Marcello Salabert de; Davide,Lisete Chamma; Soares,Geraldo Luiz Gonçalves; Viccini,Lyderson Facio.
The cytotoxicity effect of aqueous extracts of the lichens species Myelochroa lindmanii and Canoparmelia texana (Lecanorales, Parmeliaceae) were evaluated using meristematic cells of lettuce (Lactuca sativa) and maize (Zea mays). The seasonal effect was also evaluated. Extracts of M. lindmanii and C. texana inhibited root growth and/or percentage germination, possibly due to alterations in the cell cycle. The M. lindmanii extract showed anti-mitotic effects and blocked the cell cycle in metaphase so that c-mitosis and cells with chromosome duplication were produced. The C. texana extract appeared to hinder cell division, increasing the number of interphase cells. In addition, both extracts caused an increase in percentage of cell death. Clastogenic effects...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Canoparmelia texana; Cytotoxicity; Mitotic index; Myelochroa lindmanii; Plant bioassays.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000100024

Model Selection in Stochastic Frontier Analysis: Maize Production in Kenya
Provedor de dados: 31
Autores: Liu,   Yanyan.
We demonstrate how a recently developed model selection procedure can be used to choose among competing stochastic frontier models where inefficiency depends on firm characteristics. We provide evidence on the power of this procedure. Moreover, we examine the effects of model choice on estimation results. We find that different models can lead to rather different magnitudes of the partial effects of the exogenous factors. However, because the model selection procedure gives an unambiguous choice of best model, and because bootstrapping indicates that the procedure is reliable, we conclude that it does not matter whether other models give different results.
Tipo: Conference Paper or Presentation
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2006
URL: http://purl.umn.edu/21281

Modelado de la interacción de híbridos tropicales de maíz en ambientes múltiples.
Provedor de dados: 32
Autores: Lozano Ramírez, Agueda.
Los programas de mejoramiento a través de hibridación se enfocan a la obtención de mayores rendimientos, por lo que es necesario determinar los mejores ambientes predictores de su comportamiento; la interacción genotipo-ambiente (GA) puede interferir en dicha predicción y así complicar la selección. Con la finalidad de predecir el rendimiento, y estudiar la interacción GA  se utilizaron diferentes modelos estadísticos. Se realizó un estudio con un grupo de 32 híbridos blancos y otro grupo de  24 híbridos amarillos del Programa Global de Maíz del Centro Internacional de Mejoramiento de Maíz y Trigo, en 15 y 16 ambientes de América tropical respectivamente, cada uno en un diseño experimental en α-látice con 3 repeticiones. Se evaluaron seis variables a las...
Palavras-chave: AMMI; SREG FA; Genética; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2293

Modeling drying of seed maize using super absorbent hydrogel under hermetic conditions
Provedor de dados: 111
Autores: Kiburi, Florence Gatwiri; Kanali, |Christopher; Mbuge, Duncan Onyango.
The objective of this study was to establish the feasibility of applying the Page, Two term exponential, Newton, Logarithmic and Henderson and Pabis mathematical drying models for predicting the drying kinetics of seed maize using super absorbent hydrogel under hermetic conditions. To achieve this, the study was conducted using hydrogel to seed maize ratios by weight of 0:1, 1:5, 1:10 and 1:15 at four different drying temperature levels of 25oC, 30oC, 35oC and 40oC at different initial seed maize moisture contents of 16%, 28% and 53% (dry basis). The moisture data obtained were fitted into the five drying models using non-linear regression analysis (MS Excel 2003TM) based on the minimization of sum of squares by adjusting the model constants. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Drying model; Seed maize; Hydrogel; Logarithmic model.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3317

Modellierung der Auswirkungen einer Entkopplung der Direktzahlungen in der EU auf die Flächenallokation und Wiederkäuerproduktion: Eine Analyse unterschiedlicher Modellergebnisse
Provedor de dados: 31
Autores: Balkhausen,   Oliver; Banse,   Martin; Grethe,   Harald; Nolte,   Stephan.
Decoupling of direct payments can be expected to have complex effects and the net effect on crop and fodder acreage is unclear. A literature review reveals that various simulation models uniformly project a decline of the cereal and silage maize acreage as well as ruminant production in the EU-15 in the course of decoupling of direct payments. In contrast, model results are mixed with respect to the direction of the decoupling effect on oilseed and pasture as well as voluntary set aside area. The model type is not found to have a systematic effect on model results. It is rather the assumptions about the effects of direct payments on production which differ widely and drive model results to a large extent. A model analysis which is based on the partial...
Tipo: Journal Article
Palavras-chave: Decoupling; Direct payments; Land allocation; Partial equilibrium agricultural sector models; Agricultural and Food Policy; Land Economics/Use.
Ano: 2005
URL: http://purl.umn.edu/97401

Modelling fertiliser use in the grain crop and oilseed sectors of South Africa
Provedor de dados: 31
Autores: Breitenbach,   Marthinus C.; Meyer,   Nicolas G.
A Partial Equilibrium (PE) model is developed to model fertiliser use in the grain crop and oilseed sectors to assess the impact of changes in the physical and economic environment on production and fertiliser use. Since the adoption of a policy of trade liberalisation and the shift towards a free market for agricultural products, the actual cropping patterns of grain crops have moved closer to the expected optimum production pattern. It is shown that the total area cultivated will decrease by 2,4 percent. Results show that except for the area under sunflower (that remains unchanged) and yellow maize that increases, the area utilised by other crops will decrease. Fertiliser use is directly correlated with production patterns in the provinces. A comparison...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2000
URL: http://purl.umn.edu/54240

Modelling Interregional Trade of Energy Crops in Eastern Germany
Provedor de dados: 31
Autores: Khachatryan,   N.; Zeller,   Heiko; Haring,   Anna Maria; Khachatryan,   Armen.
Renewable resources gain in importance in our modern society. The line of reasoning is based on their positive effects on agriculture, the environment and the economy. To support renewable energy from biomass the EU promotes the cultivation of energy crops. A spatial equilibrium model is applied based on the concept of maximizing net welfare, to provide information whether energy crop production competes with food production for land area. The Model of Interregional Trade of Energy Crops (ITEC) refers to Eastern Germany and adjacent areas of Poland. First results show that the regions have enough feedstocks to meet the required demand for food and biofuel production. In many cases both food crops and biofuels are either traded on interregional basis or...
Tipo: Conference Paper or Presentation
Palavras-chave: Energy crops; Spatial equilibrium analysis; Interregional trade; International Relations/Trade.
Ano: 2008
URL: http://purl.umn.edu/44121

Modelling regional maize market and transport distances for biogas production in Germany
Provedor de dados: 31
Autores: Delzeit,   Ruth; Britz,   Wolfgang; Holm-Muller,   Karin.
Our location model aims to simulate location decisions for biogas plants based on profit maximisation to generate regional demand functions for maize and corresponding plant size structure and transport distances. By linking it with an agricultural sector model we derived regional maize markets. Comparing results for the REA with a scenario applying uniform per unit subsidy and producing the same energy, we see higher subsidy costs with the REA but lower transportation distances.
Tipo: Conference Paper or Presentation
Palavras-chave: Biogas; Environmental effects; Transport costs; Choice of location; Agricultural Finance; Environmental Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/53258

Modelling Soil Compaction Effects on Maize Growth and Yield in a Sandy Loam Soil
Provedor de dados: 111
Autores: IGONI, ASINYETOGHA HILKIAH; JUMBO, RAPHAEL BUTLER.
A mathematical model has been developed for the prediction of soil compaction effects on the growth and yield of maize crop in a sandy loam soil in tropical climates. The field work was done at the teaching and research farm of Rivers State University, Port Harcourt, Nigeria. A plot of land measuring 18 m x 4 m was divided into five sub-plots of equal dimensions and labelled as: plot 1 – un-compacted and untilled; plot 2 – un-compacted but tilled; and plots 3, 4 and 5 - tilled and compacted to varying degrees of tractor passes, viz 2, 4 and 6 tractor passes respectively. A Massey Ferguson (MF) 90 model disc plough was used for the tillage and an MF 260 model tractor used for the soil compaction treatments. Irrigation, weed and pest control were done...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering/Farm Power &amp; Machinery Engineering soil compaction; Maize growth; Maize yield; Sandy loam soil; Tropical climate.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5342

Modelling the Acceptance of High Beta-carotene Maize
Provedor de dados: 31
Autores: Tothova,   Monika; Meyers,   William H.
In the development of high beta carotene (HBC) maize, the focus is on subsistence farms which do not get any (or at least very little) benefit from commercial fortification programs. The technology can be considered to be primarily for the small-scale subsistence farmer. The paper postulates a household decision model that takes into account the production and consumption tradeoffs between traditional and biofortified seed. The objective is to understand the effect of these differing traits on the adoption decision when white maize is preferred by the consumers.
Tipo: Conference Paper or Presentation
Palavras-chave: Consumer/Household Economics.
Ano: 2006
URL: http://purl.umn.edu/21457

Modelling the effects of leafing phenology on growth and water use by selected agroforestry tree species in semi-arid Kenya
Provedor de dados: 31
Autores: Muthuri,   C.W.; Ong,   C.K.; Black,   C.R.; Mati,   Bancy Mbura; Ngumi,   V.W.; van Noordwijk,   Meine.
The WaNuLCAS (Water, Nutrient and Light Capture in Agroforestry Systems) model was used to investigate the impact of tree leafing phenology on the growth and water use of selected agroforestry tree species in semi-arid Central Kenya. Three agroforestry species, grevillea (Grevillea robusta), alnus (Alnus acuminate) and paulownia (Paulownia fortunei), respectively providing evergreen, semi-deciduous and deciduous leafing phenologies, were intercropped with maize. It was hypothesized that the deciduous habit of alnus and paulownia would reduce demand for water relative to the evergreen grevillea under conditions of limited supplies. WaNuLCAS simulations showed that altering leafing phenology from evergreen through semi-deciduous to deciduous decreased water...
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/47874

Modelling the genetic basis of response curves underlying genotype x environment interaction
Provedor de dados: 26
Autores: Van Eeuwijk, F.A.; Malosetti, M.; Boer, M.P.
To increase tolerance to abiotic stresses in breeding programmes, typically families and collections of genotypes are evaluated in series of trials (environments) representing different levels of stress. The statistical analysis of the data from such trials concentrates on modelling the phenotypic behaviour of the genotypes across the set of environments. This phenotypic behaviour can be modelled in the form of genotype-specific linear and non-linear response curves in relation to environmental characterizations. Non-parallelism of the response curves indicates genotype × environment interaction. Identification of the genetic basis of the parameters determining the response curves will help in the development of breeding programmes for improving abiotic...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1300

Modelling the impact of the ‘Fast Track’ land reform policy on Zimbabwe’s maize sector
Provedor de dados: 31
Autores: Kapuya,   T.; Meyer,   Ferdinand H.; Kirsten,   Johann F.
This paper attempts to analyze the impacts of the ‘fast track’ land reform policy on maize production in Zimbabwe through the construction of a partial equilibrium model that depicts what could have happened if no further policy shifts had taken place after 2000. The resimulated baseline model was used to make projections based on the various trends of exogenous variables in 2000. This means that the model generated an artificial data set based on what the maize market would have looked like under a set of the pre-2000 existent policy conditions. The ‘fast track’ land reform policy was thus assessed based on the performance of the baseline model using a range of “what if” assumptions. Commercial area harvested was 39 % less than what could have been...
Tipo: Journal Article
Palavras-chave: ‘fast track’ land reform programme; Partial equilibrium model; Maize; Zimbabwe; Crop Production/Industries; Land Economics/Use.
Ano: 2010
URL: http://purl.umn.edu/95958

Modelling Trends in Food Market Integration: Method and an Application to Tanzanian Maize Markets
Provedor de dados: 31
Autores: van Campenhout,   Bjorn.
Pushed by increasing availability of price data and extensive market liberalisation efforts in many developing countries, research on food market integration has evolved rapidly over the last two decades. Empirical methods to measure market integration diverged in two directions: on the one hand, there is the Parity Bounds Model (PBM), while on the other hand the use of Threshold Autoregressive (TAR) Models has been proposed. This article provides a discussion of the two methods and argues that TAR models are more able to capture the dynamics of the arbitrage process underlying interconnected markets. Furthermore, we extend the standard TAR model to include a time trend in both the threshold and the adjustment parameter. Using weekly maize price data on...
Tipo: Conference Paper or Presentation
Palavras-chave: Market integration; Transaction costs; Thresholds; Maize; Tanzania; Agribusiness; F15; O18.
Ano: 2005
URL: http://purl.umn.edu/24718

Modern High-Yielding Maize, Wheat and Soybean Cultivars in Response to Gypsum and Lime Application on No-Till Oxisol
Provedor de dados: 90
Autores: Nora,Douglas Dalla; Amado,Telmo Jorge Carneiro; Nicoloso,Rodrigo da Silveira; Gruhn,Eduardo Müller.
ABSTRACT Modern maize, wheat, and soybean cultivars are usually characterized by a short cycle, high shoot-root ratio, and high responsiveness to nutrient input. Continuous no-tillage management (NTS) frequently leads to a steep gradient in soil chemical quality with depth, thus decreasing yield under conditions of acid subsoil and water stress. This study aimed to evaluate the effect of gypsum, applied separately or in combination with lime, on the yield of cultivars used in the state of Rio Grande do Sul, Brazil. The study consisted of four experiments conducted on a typic Hapludox under NTS. The experiment was arranged in a randomized block design with three replications. Experiments I and II were carried out on soils with a satisfactory chemical soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Base saturation; Al saturation; Root zone; Grain yield.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100530

Möglichkeiten und Grenzen der Unkrautreduzierung durch Untersaaten in Mais
Provedor de dados: 21
Autores: Jung, Rüdiger; Rauber, Rolf.
Cultivation of maize is more demanding in organic than conventional farming. However, an increasing interest in this cultivation is noticeable. Weed regrowth is a key problem in organic maize cultivation. Therefore, an agronomy subproject of the main project ‘Breeding of maize cultivars for Organic Farming' aims at identifying a combination of maize genotype and undersown crop, which is highly effective in terms of weed suppression and maize grain yield.
Tipo: Conference paper, poster, etc.
Palavras-chave: Root crops.
Ano: 2013
URL: http://orgprints.org/21476/1/21476_jung.pdf

Molecular analysis of endophytic bacteria from the genus Bacillus isolated from tropical maize (Zea mays L.)
Provedor de dados: 58
Autores: Figueiredo,José Edson Fontes; Gomes,Eliane Aparecida; Guimarães,Claudia Teixeira; Lana,Ubiraci Gomes de Paula; Teixeira,Marta Aparecida; Lima,Guilherme Vitor Corrêa; Bressan,Wellington.
Endophytic bacteria play an important role in agriculture by improving plant performance and adaptation against biotic and abiotic stresses. In the present study molecular methods were used for identifying Bacillus endophytic bacteria isolated from Brazilian sweet corn. SDS-PAGE of wholecell protein extract of fortytwo isolates revealed a high number of scrutinable bands. Twenty-four isolates were identified in nine different groups of duplicated bacteria and eighteen were identified as unique. Some high-accumulated polipeptides with variable length were observed in almost isolates. Partial sequencing of 16S ribosomal gene revealed that all isolates are Bacillus sp. and among thirteen isolates with similar protein profiles, two were different strains....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endophytic bacteria; Bacillus; Sweet corn; SDS-PAGE; RDNA sequencing.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000300014

Molecular characterization and pathogenicity of isolates of Beauveria spp. to fall armyworm
Provedor de dados: 86
Autores: Carneiro,Andréa Almeida; Gomes,Eliane Aparecida; Guimarães,Claudia Teixeira; Fernandes,Fernando Tavares; Carneiro,Newton Portilho; Cruz,Ivan.
The objective of this work was to evaluate the pathogenicity of 24 Beauveria isolates to Spodoptera frugiperda larvae, and characterize them molecularly through rDNA-ITS sequencing and RAPD markers. Sequencing of rDNA-ITS fragments of 570 bp allowed the identification of isolates as B. bassiana or B. brongniarti by sequence comparison to GenBank. Sixty seven polymorphic RAPD fragments were capable to differentiate 20 among 24 Beauveria isolates, grouping them according to the derived host insect and to pathogenicity against maize fall armyworm larvae. Three RAPD markers were highly associated to the pathogenicity against S. frugiperda, explaining up to 67% of the phenotypic variation. Besides identification and molecular characterization of Beauveria...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spodoptera frugiperda; Entomopathogenic fungi; RAPD; RDNA-ITS.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000400010

Molecular characterization of nitrogen-fixing bacteria isolated from brazilian agricultural plants at São Paulo state
Provedor de dados: 58
Autores: Reinhardt,Érica. L.; Ramos,Patrícia L.; Manfio,Gilson P.; Barbosa,Heloiza R.; Pavan,Crodowaldo; Moreira-Filho,Carlos A.
Fourteen strains of nitrogen-fixing bacteria were isolated from different agricultural plant species, including cassava, maize and sugarcane, using nitrogen-deprived selective isolation conditions. Ability to fix nitrogen was verified by the acetylene reduction assay. All potentially nitrogen-fixing strains tested showed positive hybridization signals with a nifH probe derived from Azospirillum brasilense. The strains were characterized by RAPD, ARDRA and 16S rDNA sequence analysis. RAPD analyses revealed 8 unique genotypes, the remaining 6 strains clustered into 3 RAPD groups, suggesting a clonal origin. ARDRA and 16S rDNA sequence analyses allowed the assignment of 13 strains to known groups of nitrogen-fixing bacteria, including organisms from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endophytic bacteria; Diazotrophs; Selective isolation; Molecular systematics.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000300002

Molecular confirmation of Maize rayado fino virus as the Brazilian corn streak virus
Provedor de dados: 63
Autores: Hammond,Rosemarie Wahnbaeck; Bedendo,Ivan Paulo.
Maize rayado fino virus (MRFV), present in various countries in Latin America, has shown similarities to corn streak virus that occurs in Brazil, regarding pathogenic, serological and histological characteristics. In the current report both virus were molecularly compared to confirm the similarities between them. MRFV was identified by nucleic acid hybridization in samples of maize tissues exhibiting symptoms of "corn stunt" disease, collected from two Brazilian States - São Paulo and Minas Gerais. The coat protein gene and 3'non-translated region of MRFV were amplified from infected tissues by reverse transcription-polymerase chain reaction (RT-PCR) using MRFV-specific primers, and were characterized by nucleotide sequence and phylogenetic analysis of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: MRF virus; Corn viruses; Phytoplasma; Corn stunt.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000600015

Molecular variability in the maize grey leaf spot pathogens in Brazil
Provedor de dados: 74
Autores: Brunelli,Kátia R.; Dunkle,Larry D.; Sobrinho,Cândido A.; Fazza,Ana C.; Camargo,Luis E. A.
Isolates of  Cercospora  species from leaves displaying symptoms of grey leaf spot were collected in maize-producing areas of south-central Brazil in 2001 and 2002. Restriction digests of the internal transcribed spacer region of rDNA detected the presence of the same two  Cercospora  species described on maize in the United States, namely  C. zeae-maydis  and the recently described species,  C. zeina . Genetic variability among isolates was assessed by analysing 104 amplified fragment length polymorphism loci. Cluster analysis confirmed the genetic separation of isolates into two species with a mean similarity of 35%. Similarity levels within species were high, averaging 93% and 92% among isolates of  C. zeae-maydis  and  C. zeina , respectively. The mean...
Palavras-chave: Cercospora zeae-maydis; Cercospora zeina; Epidemiology.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500022

Monitoring and evaluation of need for nitrogen fertilizer topdressing for maize leaf chlorophyll readings and the relationship with grain yield
Provedor de dados: 52
Autores: Silva,Maria Anita Gonçalves da; Muniz,Antonio Saraiva; Mannigel,Anny Rosi; Porto,Simone Maria Altoé; Marchetti,Marlene Estevão; Nolla,Antonio; Grannemann,Ivan.
The study was carried out for two years in maize in succession to the wheat using no tillage system in a distroferric Red Latosol (Hapludox). Methods of management nitrogen fertilizer (120 kg ha-1) with ammonium sulphate were studied; the fertilizer was applied in maize sowing or in maize topdressing, and N with previous application in wheat sowing. In addition, leaf chlorophyll reading was used as an indicator for the need for topdressed nitrogen fertilizer. Nitrogen supply index (NSI) was shown to be effective at predicting need for topdressed nitrogen fertilizer for maize. The application of N improved the yield of the maize independent of the management system. The flowering stage was carried out at the appropriate time in order to estimate the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fertilized; Leaf chlorophyll; Crop rotation; No till; Zea mays; Triticum aestivum.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400004

Monitoring the threat of unintentional transgene flow into maize gene banks and breeding materials
Provedor de dados: 69
Autores: Mezzalama,Monica; Crouch,Jonathan H; Ortiz,Rodomiro.
The use of transgenic crops is steadily increasing around the world, led by soybean (based on total area) and maize (in terms of total number of countries). Transgenic maize is grown in at least 17 countries across four continents: Africa, America, Asia and Europe. The comprehensive global spread of transgenic maize has significant implications for organizations involved in germplasm conservation and genetic enhancement; particularly as some countries require a GMO-free declaration when receiving shipments of maize germplasm. This article describes the protocol used by the International Maize and Wheat Improvement Center (CIMMYT) for monitoring unintentional transgene flow in maize genebank and breeding plots. The protocol is based on polymerase chain...
Tipo: Journal article
Palavras-chave: Biosafety; Genetic integrity; Germplasm enhancement; GM-maize.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582010000200006

Monsanto's Adventures in Zulu Land: Output and Labour Effects of GM Maize and Minimum Tillage
Provedor de dados: 31
Autores: Gouse,   Marnus; Piesse,   Jenifer; Thirtle,   Colin G.
The only commercial genetically modified (GM) subsistence food crop is white maize in South Africa, which was released in 2001/2. This paper reports on the performance of insect resistant (Bt) white maize grown by smallholders in Hlabisa, KwaZulu Natal, where the other development is minimum tillage. The results show that, contrary to many inflated claims, in the dry 2003/4 season, there was no significant difference between the yield per kg of seed for Bt and conventional maize, due to very low stalk borer infestation levels. Farmers who planted Bt maize in 2003/2004 were thus worse off as they paid more for seed and obtained no benefit. This is measured using efficiency scores from a stochastic frontier analysis. These results conflict with the yield per...
Tipo: Conference Paper or Presentation
Palavras-chave: Agribusiness; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; O33; Q16.
Ano: 2006
URL: http://purl.umn.edu/25309

More than wheat - the market potential of currently underutilised cereal crops
Provedor de dados: 21
Autores: Oehen, Bernadette; Moschitz, Heidrun.
Diversity in arable production across Europe has been on the decline, with only a few varieties of common wheat, maize and barley accounting formore than85% of the cereals produced in the EU-28in 2015. The focus on only a few crops has shown to increase the risk of production loss due to pests and diseases.We conducted case studies of regional market initiatives in fourcountries to understand the success factors as well as challenges faced by initiatives aiming to increase cereal diversity and promote minor cereal crops. The four initiatives studied were involved with the production and trade of rye, oats, spelt, emmer and einkorn. The major  success factors for these initiatives was the niche marketing approach used combined withthe skills and expertise...
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds Markets and trade Produce chain management.
Ano: 2018
URL: http://orgprints.org/34726/1/oehen-moschitz-2018-IFSA-Symposium_themeV-BoA-p1-11.pdf

Morphogenetic characteristics of Brachiaria ruziziensis in consortium systems with corn
Provedor de dados: 22
Autores: Scheidt, Kácia Carine; Mesquita, Eduardo Eustáquio; de Oliveira, Newton Tavares Escocard; Mecabô, Carolina Aletéia; Lipsch, Rafael Ricardo; Castagnara, Deise Dalazen; Cristófori, Eliseu Carlos; Giaretta, Luiz Eduardo.
The objective of this work was to study the consortium of corn with Brachiaria ruziziensis regarding the morphogenesis of the forage. The field experiment was conducted on November 2012 to April 2013, in an area of UNIOESTE, campus Marechal Cândido Rondon, Paraná State. The experimental design was randomized blocks in 2x3 factorial design, with three replications. The treatments consisted of two spacings (45 and 90 cm), conducted in three types of cultivation (B. ruziziensis; B. ruziziensis with corn in the row; and B. ruziziensis with corn between the row). The morphogenical characteristics evaluated were: rates of leaf appearance, leaf elongation, number of green leaves and leaf life span. The leaf elongation rate of B. ruziziensis cultivated alone was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: : competição; Integração lavoura-pecuária; Zea mays L.
Ano: 2014
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/11172

Morphological alterations of corn (Zea mays L.) plants in response to aluminum toxicity in the soil
Provedor de dados: 52
Autores: Souza,José Roberto Pinto de; Guimarães,Maria Fátima de; Muller,Marcelo Marques Lopes; Santos,Carlos Henrique dos.
The objective of the experiment was to identify the morphological alterations in corn genotypes in response to aluminum toxicity in the soil. A complete randomized block design with five replications was used. The a factorial scheme was composed of two corn genotypes (C525M - tolerant, and HS701B - sensitive) and two neutralization levels (0% and 100% of aluminum saturation). The evaluations were performed at six leaf and 10-11 leaf growth stages, emergence of the "stigma-style", and the physiological maturity. The presence of toxic aluminum didn’t significantly reduce diameter and height of stem, leaf area, dry matter of aerial parts, total dry matter and yield. Stem diameter, leaf area, dry matter of root, dry matter of aerial parts, total dry matter and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant physiology; Maize; Soil acidity; Plant growth.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000400010

MORPHOLOGICAL AND MICROMORPHOLOGICAL CHANGES IN THE STRUCTURE OF A RHODIC HAPLUDOX AS A RESULT OF AGRICULTURAL MANAGEMENT
Provedor de dados: 90
Autores: Silva,Laura Fernanda Simões da; Marinho,Mara de Andrade; Matsura,Edson Eiji; Cooper,Miguel; Ralisch,Ricardo.
In evaluation of soil quality for agricultural use, soil structure is one of the most important properties, which is influenced not only by climate, biological activity, and management practices but also by mechanical and physico-chemical forces acting in the soil. The purpose of this study was to evaluate the influence of conventional agricultural management on the structure and microstructure of a Latossolo Vermelho distroférrico típico (Rhodic Hapludox) in an experimental area planted to maize. Soil morphology was described using the crop profile method by identifying the distinct structural volumes called Morphologically Homogeneous Units (MHUs). For comparison, we also described a profile in an adjacent area without agricultural use and under natural...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop profile method; Soil structure; Image analysis; Conventional system.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100205

Morphological markers for microspore developmental stage in maize
Provedor de dados: 52
Autores: Moraes,Ana Paula de; Bered,Fernanda; Carvalho,Fernando Irajá Felix de; Kaltchuk-Santos,Eliane.
The use of maize in anther culture has been limited because only few genotypes presented a high androgenetic potential. Obtaining the proper stage of microspore development at culture initiation is one of the most crucial factors for success in the androgenesis. For Brazilian maize genotypes there are no studies reporting a correlation between cytological features and morphological parameters. In this study, morphological parameters were recorded and associated with cytological specific stages of the the microsporogenesis in two Brazilian maize genotypes that were sowed in different places (field and growing chamber). For both genotypes, the plants of the growing chamber presented a delay in development. Spikelets length and anther length/spikelet length...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Androgenesis; Anther culture; Microsporogenesis; Zea mays.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500006

Morphostructural characterization of soil conventionally tilled with mechanized and animal traction with and without cover crop
Provedor de dados: 90
Autores: Ralisch,Ricardo; Almeida,Edinei de; Silva,Adriana Pereira da; Pereira Neto,Osvaldo Coelho; Guimarães,Maria de Fátima.
The structural stability and restructuring ability of a soil are related to the methods of crop management and soil preparation. A recommended strategy to reduce the effects of soil preparation is to use crop rotation and cover crops that help conserve and restore the soil structure. The aim of this study was to evaluate and quantify the homogeneous morphological units in soil under conventional mechanized tillage and animal traction, as well as to assess the effect on the soil structure of intercropping with jack bean (Canavalia ensiformis L.). Profiles were analyzed in April of 2006, in five counties in the Southern-Central region of Paraná State (Brazil), on family farms producing maize (Zea mays L.), sometimes intercropped with jack bean. The current...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil tillage; Cultural profile; Morphological homogeneous units; Structural recovering.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000600003

Mortality of insects and quality of maize grains in hermetic and non-hermetic storage
Provedor de dados: 91
Autores: Viebrantz,Priscila C.; Radunz,Lauri L.; Dionello,Rafael G.
ABSTRACT Due to the need to improve the quality and safety of foods, chemical methods used to control grain pests have been replaced by alternative methods. For example, modified atmosphere within the storage units has been used. Therefore, the objective was to evaluate maize grain quality and mortality of insects of the species Sitophilus zeamais and Tribolium castaneum in hermetic and non-hermetic environments for 50 days of storage. The hermetic units consisted of polyethylene "bags" with capacity for 60 kg. A cage with 20 adults of each species and 200 g of maize was placed inside each unit. The oxygen level was quantified every five days. Evaluations of insect mortality and survival occurred at 10, 20, 30, 40 and 50 days of storage. At 0, 30 and 50...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grain storage; Modified atmosphere; Pest control; Fungal incidence; Density.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000500487

Mountains of Maize, Persistent Poverty
Provedor de dados: 31
Autores: Jayne,   Thomas S.; Mason,   Nicole M.; Burke,   William J.; Shipekesa,   Arthur M.; Chapoto,   Antony; Kabaghe,   Chance.
The past two years are a tribute to Zambian farmers; they have responded admirably to government efforts to promote maize production. But ironically, rural poverty remains stubbornly high despite the fact that the government has spent over 2% of the nation’s gross domestic product in supporting maize production and subsidizing inputs for farmers. Why is it that maize production has increased so impressively without making a serious dent in rural poverty? And what are the lessons for the new government?
Tipo: Technical Report
Palavras-chave: Maize; Poverty; Zambia; Agricultural and Food Policy; Food Security and Poverty.
Ano: 2011
URL: http://purl.umn.edu/118476

Movement of Heterorhabditis amazonensis and Steinernema arenarium in search of corn fall armyworm larvae in artificial conditions
Provedor de dados: 63
Autores: Andaló,Vanessa; Santos,Viviane; Moreira,Grazielle F.; Moreira,Camila; Freire,Marcela; Moino Jr.,Alcides.
Spodoptera frugiperda (Smith, 1797) (Lepidoptera: Noctuidae) is considered to be the main pest of maize crops in Brazil. Entomopathogenic nematodes (EPN) may be used to control this pest and exhibit different, unique abilities to search for their hosts. The movement of EPN in relation to S. frugiperda was evaluated. To test for horizontal movement, a styrofoam enclosure filled with sand was divided into segments, nematodes were placed at the entrance to the enclosure and a larva was placed at the end of each division. The same approach was used to evaluate vertical movement; however, PVC pipes were used in this case. In general, the mortality was inversely proportional to the initial distance between host and nematodes. In the vertical displacement test,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spodoptera; Biological control; Behaviour; Strategy; Entomopathogenic.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000300008

Mozambique's Food Security Success Story
Provedor de dados: 31
Autores: SIMA,   Technical Team.
Resultados das investigações do Projecto de Segurança Alimentar em Moçambique MAP-Direcção de Economía-Dpto. Estatística
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Food Security and Poverty; Q18.
Ano: 1996
URL: http://purl.umn.edu/55195

Mudanças climáticas futuras afetarão a produtividade de milho em Minas Gerais.
Provedor de dados: 14
Autores: CAMILO, J. A.; ANDRADE, C. de L. T. de; AMARAL, T. A.; CHOU, S. C.; TIGGES, C. H. P.; MELO, M. L. A. de; GARCIA Y GARCIA, A.
Como a produção agrícola possui alto grau de sensibilidade ao clima, as alterações climáticas afetam o crescimento, desenvolvimento e a produtividade das culturas. Elementos do clima, como temperatura, radiação solar e precipitação pluvial, têm efeito direto no rendimento do milho, demandando avaliações que permitem o planejamento de estratégias de mitigação. O objetivo da pesquisa foi avaliar os impactos de cenários de mudanças climáticas na produtividade do milho cultivado em regime de sequeiro, na safra, em Minas Gerais. A estratégia de pesquisa consistiu no uso dos modelos de circulação global e regional, associados à modelagem de culturas. Foram utilizados os modelos de circulação global HadGEM2ES e MIROC5, acoplados ao modelo regional Eta, para gerar...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Clima; Zea Mays; Produção; Modelo de Simulação; Modelo Matemático.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103940

Mudanças no Mercado e na Produção para Melhorar a Segurança Alimentar em Moçambique
Provedor de dados: 31
Autores: Tschirley,   David L.; Abdula,   Danilo Carimo; Weber,   Michael T.
Resultados de pesquisa do Departmento de Análise de Políticas, MINAG, Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Maize; Food Security and Poverty; Marketing; Q18.
Ano: 2005
URL: http://purl.umn.edu/55249

MUEGANO: A divide and conquer algorithm to overcome memory limitations when assembling shotgun projects
Provedor de dados: 17
Autores: Octavio Martinez; Araceli Fernandez-Cortes.
When assembling a large quantity of reads in a genomic shotgun project a serious limitation is the amount of random access memory (RAM) of the computers used in the project. This arises because all assembling programs must look at all the overlaps between reads at the same time, using RAM in order to construct contigs, and the memory of the computer can be filled up during this step, causing the abortion of the assembling process.&amp;#xd;&amp;#xa;Here we propose an algorithm that is capable of overcoming any memory limitation by using redundancy of processing and thus producing an increase in computing time but overcoming the memory limitation.&amp;#xd;&amp;#xa;The proposed algorithm consists in dividing the reads in a set of groups which size is half the...
Tipo: Manuscript
Palavras-chave: Genetics &amp; Genomics; Bioinformatics.
Ano: 2009
URL: http://precedings.nature.com/documents/3712/version/1

Multifractal analysis of soil fauna diversity indexes
Provedor de dados: 53
Autores: Silva,Raimunda Alves; Siqueira,Glécio Machado.
ABSTRACT The objective of this study was to determine the multifractality of diversity indexes of edaphic fauna in areas with natural vegetation and in agricultural systems. Biological sampling was carried out in seven treatments (millet, maize, soybean, eucalyptus, preserved cerrado, disturbed cerrado and pasture), containing 130 pitfall traps, distributed in transects with 3 m of spacing between sampling points, totaling 390 m. The multifractal analysis was determined based on the moment method, where estimates such as the capacity dimensions, entropy and the correlation of the diversity indexes were calculated. The soybean area had greater Shannon diversity (2.69), however it had smaller abundance of individuals. The partition functions were adjusted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecological modelling; Arthropods communities; Multifractality; Generalized dimension; Singularity spectrum.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052020000100120

Multiple cropping systems which include corn and sorghum in central Thailand, crop year 1973
Provedor de dados: 106
5 tables
Palavras-chave: Corn; Maize; Sorghum; Multiple cropping; Cropping systems; Yields; Thailand; ข้าวโพด; ข้าวฟ่าง; ระบบการปลูกพืช; การปลูก; การผลิตพืช.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3806

Multiple cropping systems which included corn and sorghum in Amphoe Phayuha Khiri, Changwat Nakorn Sawan, crop year 1970
Provedor de dados: 106
Autores: Sarun Wattanutchariya; Kamphol Adulavidhaya.
8 tables
Palavras-chave: Corn; Maize; Sorghum; Multiple cropping; Cropping systems; ข้าวโพด; ข้าวฟ่าง; ระบบการปลูกพืช.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3768

Multiple nutrient imbalances in eara-leaves of on-farm cultivated maize in Eastern Africa
Provedor de dados: 21
Autores: Høgh-Jensen, Henning; Kamalongo, D.; Myaka, F.A.; Adu-Gyamfi, J.J.
Maize is a major food crop in eastern and southern Africa and is often cultivated with insufficient supplies of nutrients. The current studies are aimed at diagnosing any potential nutrient limitation in maize under farmers’ conditions using the nutrient content in ear leaf tissue at tasseling stage. The majority of the maize crops were considered below the critical nitrogen (N) content in the ear leaves with mean N content of 1.84%. Phosphorus (P), B and Cu content appeared critically low at three of the four sites. Unique fingerprinting by multivariate statistics was possible for each site when using the proportion of nutrients in the leaf tissue. The content of six macro elements (N, P, K, S, Mg, Ca) at the tasseling stage were found to be able to...
Tipo: Journal paper
Palavras-chave: "Organics" in general; Crop husbandry.
Ano: 2009
URL: http://orgprints.org/18303/1/18303.pdf

Multiple regression as a method for the selection of early maturing varieties
Provedor de dados: 106
Autores: Singh, Joginder; Agarwal, K.N.; Sethi, A.S.
1 ill., 4 tables
Palavras-chave: Corn; Maize; Multiple regression; Selection; Early maturing varieties; ข้าวโพด; มัลติเปิล รีเกรสชั่น; การคัดเลือก; พันธุ์เบา.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3894

Multi-purpose cowpea inoculation for improved yields in small holder farms in Kenya
Provedor de dados: 21
Autores: Mathu, Samuel; Thonar, Cécile; Vanlauwe, Bernard; Messmer, Monika; Frossard, Emmanuel.
Introduction  In Kenya, cowpea is the most important pulse crop in the dry lands of Eastern and Coastal regions where it is commonly inter cropped with maize and sorghum.  The poor yields obtained in small holder farms in Kenya (150 kg ha-1) can in part be attributed to the use of poor yielding varieties, low soil fertility (mainly N and P deficiency) low presence of effective indigenous rhizobia and high occurrence of highly competitive but inefficient indigenous rhizobia strains.  Biological nitrogen fixation (BNF) through exploitation of the rhizobia-legume symbiosis and use of inoculants coupled with soil amendments such as Phosphorus offers in part a means to improve cowpea yield, nutrition and soil fertility.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality Breeding; Genetics and propagation Africa.
Ano: 2012
URL: http://orgprints.org/22169/1/mathu-etal-2012-Poster-ISFM-nairobi-kenya.pdf

Multispectral aerial images for the evaluation of maize crops
Provedor de dados: 64
Autores: Hoss,Douglas Felipe; Luz,Gean Lopes da; Lajús,Cristiano Reschke; Moretto,Marcos Antônio; Tremea,Geraldo Antonio.
ABSTRACT The combination of multispectral aerial images and computational processing is emerging as one of the solutions used in precision agriculture to observe the nutritional status of plants. The objective of this study is therefore to associate the nitrogen content and dry weight of the aerial part of maize plants (DW) with the vegetation indices obtained by multispectral aerial images (NDVIA and NDREA), and with the SPAD index and the Greenseeker NDVI, in the vegetative stage V6. To this end, randomized blocks in a factorial scheme of 6x4 (six nitrogen doses at the base and four different flight altitudes) were used, with three replications. The collected data was submitted to ANOVA with the F test (p = 0,05) and subsequent regression analysis. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Precision agriculture; Nitrogen; Computational processing.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100216

Multi-trait multi-environment QTL modelling for drought-stress adaptation in maize
Provedor de dados: 26
Autores: Malosetti, M.; Ribaut, J.M.; Vargas, M.; Crossa, J.; Boer, M.P.; Van Eeuwijk, F.A.
Water shortage is a major cause of yield loss in maize. Thus, breeding for adaptation to waterstressed environments is an important task for breeders. The use of quantitative-trait loci (QTL) models in which the response of complex phenotypes under stressed environments is described in direct relation to molecular information can improve the understanding of the genetic causes underlying stress tolerance. Mixed QTL models are particularly useful for this type of modelling, especially when the data stem from multi-environment evaluations including stressed and non-stressed conditions. The study of complex phenotypic traits such as yield under water-limited conditions can benefit from the analysis of trait components (e.g., yield components) that can be...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1293

Multivariate analyses of genotype x environment interaction of popcorn
Provedor de dados: 86
Autores: Miranda,Glauco Vieira; Souza,Leandro Vagno de; Guimarães,Lauro José Moreira; Namorato,Heraldo; Oliveira,Lucimar Rodrigues; Soares,Marcelo Oliveira.
The objectives of this work were to evaluate the genotype x environment (GxE) interaction for popcorn and to compare two multivariate analyses methods. Nine popcorn cultivars were sown on four dates one month apart during each of the agricultural years 1998/1999 and 1999/2000. The experiments were carried out using randomized block designs, with four replicates. The cv. Zélia contributed the least to the GxE interaction. The cv. Viçosa performed similarly to cv. Rosa-claro. Optimization of GxE was obtained for cv. CMS 42 for a favorable mega-environment, and for cv. CMS 43 for an unfavorable environment. Multivariate analysis supported the results from the method of Eberhart &amp;amp; Russell. The graphic analysis of the Additive Main effects and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Adaptability; Breeding; Maize; Popcorn; Selection; Stability.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000100007

Multivariate technique for determination of soil pedoenvironmental indicators in Southern Amazonas
Provedor de dados: 1
Autores: Oliveira, Ivanildo Amorim de; Marques Júnior, José; Campos, Milton César Costa; Aquino, Renato Eleoterio de; Freitas, Ludmila de; Ferraudo, Antônio Sérgio.
The use of statistical techniques to evaluate soil attribute behaviour is an important tool for choosing the most adequate form of soil management. Thus, the aim of this study was to jointly assess the physical and chemical attributes and the magnetic susceptibility characteristics of three environments and to use multivariate statistics to define which attributes have the greatest potential as environmental change indicators. The study was conducted in three areas: one with archaeological black earth (and planted maize); one with pasture; and one of the forest. Sixty-four (64) deformed and non-deformed soil samples each were collected within these areas, with a 70 x 70 m grid spaced every 10 meters at depths of 0.0-0.2 and 0.4-0.6 m, to determine the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.01.00-5; 5.01.01.06-4; 5.01.01.02-1; 5.01.01.03-0 main component; Amazonian; Archaeological dark earth Manejo e Conservação do Solo; Física do Solo; Química do Solo.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30763

Mycorrhiza influence on maize development under Cd stress and P supply
Provedor de dados: 61
Autores: Andrade,Sara A. L. de; Silveira,Adriana P. D. da.
The role of arbuscular mycorrhizal fungi (AMF) on cadmium (Cd) accumulation and on the possible attenuation of Cd stress was studied in maize plants (Zea mays L. var. Exceller). Plants inoculated or not with Glomus macrocarpum were exposed to Cd (0-20 µmol L-1), at two P levels (5 and 10 mg L-1) in the nutrient solution. The experiment was conducted in a hydroponic system, using a randomized 2 x 2 x 2 factorial design. The mycorrhiza-Cd interaction on plant growth, nutrients and Cd accumulation, AMF root colonization and on extra-radical mycelium was investigated. Mycorrhiza promoted plant growth whereas Cd addition reduced plant biomass production. No difference in plant Cd concentrations was found between mycorrhizal (M) and non-mycorrhizal (NM) plants,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arbuscular mycorrhizal fungi; Cd distribution; Extra-radical mycelium; Heavy metals; Peroxidase; Phosphorus.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000100005

Mycorrhizal colonization and nutrition of wheat and sweet corn grown in manure-treated and untreated topsoil and subsoil
Provedor de dados: 18
Autores: Tarkalson, David D.; Jolley, Von D.; Robbins, Charles W.; Terry, Richard E.
Tipo: Article
Palavras-chave: Corn / maize; Small grain; Corn; Small grains; Mass Import - autoclassified (may be erroneous).
Ano: 1998
URL: http://eprints.nwisrl.ars.usda.gov/695/1/964.pdf

Mycotoxin in mold corn, detoxification and utilization of mold corn in chick rations
Provedor de dados: 106
Autores: Prateap Rachapaetayakom; Ankana Hanbranchong; Suporn Sukhupanyaraxa.
4 tables
Palavras-chave: Corn; Maize; Chickens; Mycotoxin; Mold corn; Detoxification; Rations; Ingredients; Feeds; Growth; ข้าวโพด; สารพิษจากเชื้อรา; การทำลายสารพิษ; สูตรอาหาร; ลูกไก่.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3943

NaCl effects in Zea mays L. x Tripsacum dactyloides (L.) L. hybrid calli and plants
Provedor de dados: 69
Autores: Pesqueira,Julieta; García,Maria Dina; Staltari,Sebastian; Molina,Maria del Carmen.
High salt concentrations in soils negatively affect maize growth. Techniques such as remote hybridization and in vitro selection have been extensively used to accelerate breeding processes. In order to determine the usefulness of Tripsacum to improve salt tolerance in maize, the effects of NaCl, in vitro and in vivo, were evaluated in an intergeneric hybrid (MT) obtained from crossing Zea mays with Tripsacum dactyloides. Organogenic calli, induced from immature MT hybrid embryos, were exposed to different NaCl concentrations and the survival and regeneration percentages were calculated. Plants of the MT hybrid, obtained from the organogenic calli, were exposed to NaCl concentrations considered harmful for maize. The shoot dry weights of plants exposed to...
Tipo: Journal article
Palavras-chave: Intergeneric hybrid; Plant regeneration; Organogenesis; Salinity tolerance.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300022

National Corn and Sorghum Research Center operation report, 1977
Provedor de dados: 106
Autores: Porn Rungchang.
11 tables
Palavras-chave: Corn; Maize; Sorghum; National Corn and Sorghum Research Center; Research work; Administration work; ข้าวโพด; ข้าวฟ่าง; งานวิจัย; งานบริหาร; คณะทำงาน; การผลิตเมล็ดพันธุ์.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3949

National Corn and Sorghum Research Center progress report 1983
Provedor de dados: 106
Autores: Porn Rungchang.
8 tables
Palavras-chave: National Corn and Sorghum Research Center; Research work; Corn; Maize; Sorghum; Research projects; Research area; Experimental material; Labour; Fuel and lubricant; Irrigation; Seed production; Training; Academic service; Demonstration plot; ข้าวโพด; ข้าวฟ่าง; โครงการวิจัย; พื้นที่วิจัย; อุปกรณ์การทดลอง; แรงงาน; น้ำมันเชื้อเพลิง; น้ำมันหล่อลื่น; การให้น้ำชลประทาน; การผลิตเมล็ดพันธุ์; การฝึกอบรม; การบริการวิชาการ; แปลงสาธิต.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4150

N-Auswaschung unter ökologisch und konventionell bewirtschafteten Praxisflächen in Norddeutschland – Ergebnisse aus dem Projekt COMPASS
Provedor de dados: 21
Autores: Kelm, Michael; Loges, Ralf; Taube, Friedhelm.
Nitrogen (N) leaching, especially in the form of nitrate (NO3-), still represents a major environmental impact from agriculture. In order to estimate potential N leaching losses under conditions on commercial farms in Northern Germany, N leaching was analyzed by using ceramic suction cups on representative fields on eight organic and conventional farms. On dairy farms, permanent grassland and maize for silage were analyzed as the main fodder crops. On arable farms, one crop with a high risk and one with a low risk of N leaching losses were selected. On permanent grassland, N leaching was pronouncedly lower on organic farms. If grass/clover on organic farms was ploughed, high amounts of N were leached in the following winter, irrespective if grass/clover...
Tipo: Conference paper, poster, etc.
Palavras-chave: Air and water emissions.
Ano: 2007
URL: http://orgprints.org/11005/1/256_9765_Kelm_N%2DAuswaschung.pdf

NET SOCIAL PROFITABILITY AND DOMESTIC RESOURCE COST OF EIGHT AGRICULTURAL COMMODITIES IN THAILAND
Provedor de dados: 31
Autores: Lokaphadhana,   Tipaporn; Welsch,   Delane E.
The main purpose of this study is to measure, among commodities and among agro-economic zones, the economic efficiency and the real cost of earning foreign exchange through producing and exporting eight selected commodities by using the concepts of social profitability and domestic resource cost. The eight selected commodities are namely: rice, sugar cane, maize, cassava root, kenaf, mung beans, ground nuts and soybeans. The interaction between economic efficiency and government intervention in the external trade of these commodities will also be examined. The period included in the study will be 1977/78, 1978/79, 1979/80 and 1980/81 crop years.
Tipo: Working or Discussion Paper
Palavras-chave: Productivity Analysis.
Ano: 1982
URL: http://purl.umn.edu/13418

New baby corn variety : CMB 8704
Provedor de dados: 106
Autores: Prawit Puddhanon; Sakol Petchmanee; Penkae Nattribhop; Supachai Kaewmeechai; Suvit Punsurintr; Vichit Kajornmalee.
Palavras-chave: Corn; Maize; Baby corn; CMB 8704; Plant breeding; ข้าวโพด; ข้าวโพดฝักอ่อน; การปรับปรุงพันธุ์; ผลผลิต; คุณภาพ.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4328

New discovery of the oldest maize weevils in the world from Jomon potteries, Japan
Provedor de dados: 17
Autores: Hiroki Obata; Aya Manabe; Naoko Nakamura; Tomokazu Onishi; Yasuko Senba.
The maize weevil (_Sitophilus zeamais_) and rice weevil (_Sitophilus oryzae_) are two of the most damaging insects for stored grains, and are characteristic species of ancient Japan. Both species and the granary weevil (_Sitophilus granarius_) are common elsewhere in the world, but the natural distribution of maize and rice weevils is restricted to the Old World^1^. Japanese archaeological records contain a few maize weevil fossils after the Middle Yayoi period (ca. 2000 aBP)^2^. However, since evidence of weevils was discovered as impressions in Jomon potsherds in 2004^3^, many weevil impressions have been found. The oldest is from the Late Jomon (ca. 4000 to 3200 aBP). These findings and other archaeological evidence suggest that the maize weevil invaded...
Tipo: Manuscript
Palavras-chave: Evolutionary Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4407/version/1

New improved maize population, NS 104
Provedor de dados: 106
Autores: Yodsaporn Chantachum; Charas Kitbamroong; Pichet Grudloyma; Kritchai Jaiserb; Sanit Choowa; Sompong Tongchuay; Amnuay Tongdee; Narongsak Senanarong.
1 ill., 3 tables
Palavras-chave: Corn; Maize; Breeding; NS 104; Maize population; Regional yield trial; ข้าวโพด; การปรับปรุงพันธุ์พืช; การปรับปรุงประชากร; การทดสอบพันธุ์; ศูนย์วิจัยพืชไร่นครสวรรค์.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4238

New inoculants on maize silage fermentation
Provedor de dados: 96
Autores: Assis,Fábia Giovana do Val de; Ávila,Carla Luiza da Silva; Pinto,José Cardoso; Schwan,Rosane Freitas.
The objective of this study was to evaluate the effect of bacterial inoculants at two inoculation rates on chemical and biological characteristics of maize silage. The treatments consisted of two inoculating rates (5 and 6 log cfu g-1of forage) for each strain of lactic acid bacteria (LAB) identified as Lactobacillus buchneri, L. hilgardii, or L. plantarum. The maize was ensiled in experimental PVC silos. Samples were taken for the determination of the contents of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), water-soluble carbohydrates (WSC), organic acids and alcohols, for the evaluation of the populations of lactic acid bacteria, yeasts, filamentous fungi, and for the determination of pH values during ensilage and after 30 or 90...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Filamentous fungi; Inoculation; Lactic acid bacteria; Volatile fatty acids; Yeasts.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000800395

New record of Tetrastichus howardi (Olliff) as a parasitoid of Diatraea saccharalis (Fabr.) on maize
Provedor de dados: 63
Autores: Cruz,Ivan; Redoan,Ana Carolina; Silva,Rafael Braga da; Figueiredo,Maria de Lourdes Corrêa; Penteado-Dias,Angélica Maria.
Diatraea saccharalis (Fabr.) (Lepidoptera: Pyralidae) spends the largest part of its life cycle inside the stalk of the host plant,which provides protection against the action of conventional control methods. Biological control has been considered a viable alternative to control this pest in sugarcane (Saccharum officinarum L.) and corn (Zea mays L.), two pest preferential hosts. This paper reports the occurrence in Brazil of Tetrastichus howardi (Olliff) (Hymenoptera; Chalcidoidea: Eulophidae) parasitizing pupae of D. saccharalis obtained from corn plants. It also includes preliminary biological data about the insect. A single female of T. howardi is able to produce up to 66 offspring using a single pupa of the host D. Saccharalis and apparently does not...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Biological control; Host-parasitoid interactions; Maize pest; Sugarcane borer; Parasitism.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000200017

New resistance genes in the Zea mays: exserohilum turcicum pathosystem
Provedor de dados: 74
Autores: Ogliari,Juliana Bernardi; Guimarães,Marco Antônio; Geraldi,Isaías Olívio; Camargo,Luis Eduardo Aranha.
The use of monogenic race-specific resistance is widespread for the control of maize (Zea mays L.) helminthosporiosis caused by Exserohilum turcicum. Inoculation of 18 Brazilian isolates of E. turcicum onto elite maize lines containing previously identified resistance genes and onto differential near-isogenic lines allowed the identification of new qualitative resistance genes. The inoculation of one selected isolate on differential near-isogenic lines, F1 generations and a BC1F1 population from the referred elite lines enabled the characterization of the resistance spectrum of three new genes, one dominant (HtP), one recessive (rt) and a third with non-identified genetic action. Three physiological races of the pathogen were also identified including two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Northern leaf blight; Genetic inheritance; Resistance genes; Races; Maize.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000300017

New Risks and Opportunities for Food Security: Scenario Analyses for 2015 and 2050
Provedor de dados: 31
Autores: von Braun,   Joachim; Rosegrant,   Mark W.; Pandya-Lorch,   Rajul; Cohen,   Marc J.; Cline,   Sarah A.; Brown,   Mary Ashby; Bos,   Maria Soledad.
Given the number of undernourished people in the developing world and the increasingly complex risks to food security, policymakers are faced with an enormous agenda. Freeing people from hunger will require more and better-targeted investments, innovations, and policy actions, driven by a keen understanding of the dynamic risks and forces that shape the factors affecting people’s access to food and the links with nutrition. The International Food Policy Research Institute’s (IFPRI’s) International Model for Policy Analysis of Agricultural Commodities and Trade (IMPACT) provides insight into the management of these risks through appropriate policy actions. By projecting future global food scenarios to 2050, IMPACT explores the potential implications of...
Tipo: Working or Discussion Paper
Palavras-chave: Food Security and Poverty.
Ano: 2005
URL: http://purl.umn.edu/42269

Nigeria’s grain resource structure and government sustainable policy: a review
Provedor de dados: 111
Autores: Chinenye, Ndukwu Macmanus.
Nigeria is rich in several food grain resources that empower the country with a large capacity to develop a food-grain policy. The current food-grain resource structure of Nigeria is reviewed in terms of production, milling, storage structure and issues confronting the sector growth, sustainability, policies and frameworks towards the actualization of food production efficiency. Total food-grain consumption (wheat, maize, sorghum and rice) decreased by 1.2 Mt in 2011-2013. Local consumption of wheat, and rice marginally increased by 191,000 and 500,000 t respectively in 2011-2013, that of maize and sorghum decreased by 1.5 Mt and 350,000 t respectively at the same period. About 76% of the total food grain consumption was produced locally in 2011/2012 while...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural and biological engineering FOOD GRAIN; STORAGE STRUCTURE; SUSTAINABLE DEVELOPMENT; GOVERNMNT POLICY; NIGERIA.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3019

Nine cycles of mass selection for increasing oil content in two maize (Zea mays L.) synthetics
Provedor de dados: 74
Autores: Rosulj,Milorad; Trifunovic,S.; Husic,I.
The objectives of this study were to estimate changes in oil content, grain yield, percentage of broken plants and changes in yield components in the maize populations DS7u and YuSSSu. As estimations were performed at C0 and C9 for both populations, it was possible to observe changes occurring following long-term mass selection for high oil content. The synthetic population DS7u population was developed by recombination of 29 inbred lines of Yugoslav, Canadian and US origin. The synthetic population YuSSSu population is an Iowa Stiff Stalk Synthetic - BSS(R)C5. Progenies were derived according to the North Carolina Design II. Results indicated that nine cycles of selection led to statistically significant increase in oil content and statistically...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn; Mass selection; High oil populations; Components of genetic variance; Additive and phenotypic correlations.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400015

Nitrate leaching from silage maize
Provedor de dados: 21
Autores: Hansen, E.M.; Eriksen, J.
During the last 20 years the area with maize in Denmark has increased dramatically and reached 163,000 ha in 2008. Silage maize is easy to grow, is a suitable fodder for cows and goes well with grass-clover in the diet. This means that silage maize is often found in crop rotations with grass-clover on sandy soils in western Denmark. The ploughing in of grass-clover fields poses a serious risk of increased nitrate leaching on a coarse sandy soil, even when carried out in spring. With increased maize cropping, there is therefore a need for strategies to reduce nitrate leaching after ploughing of grass-clover.In the ICROFS project, OrgGrass, we examined the effect of catch crop and slurry application on nitrate leaching from maize after a spring-ploughed...
Tipo: Newspaper or magazine article
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/17876/1/17876.pdf

Nitrate leaching in maize after ploughing of grass-clover
Provedor de dados: 21
Autores: Hansen, E.M.; Eriksen, J.
No summary yet
Tipo: Journal paper
Palavras-chave: Air and water emissions; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/20648/1/art_majs09.pdf

Nitrate reductase and glutamine synthetase activities in S1 endogamic families of the maize populations Sol da Manhã NF and Catetão
Provedor de dados: 93
Autores: MACHADO,ALTAIR TOLEDO; SODEK,LADASLAV; PATERNIANI,ERNESTO; FERNANDES,MÂNLIO SILVESTRE.
The possibility of improving nitrogen use efficiency in maize was investigated using S1 endogamic families of the populations Sol da Manhã NF and Catetão. A simple 10 X 10 lattice design was adopted and the trials carried out at the experimental field of MITLA AGRÍCOLA LTDA, in Uberlândia, State of Minas Gerais, during the 1994/95 planting season. Based on grain production figures, the three best and three worst performing S1 endogamic families were selected for this study. These were pooled to form four sub-populations denominated NFB, NFR (the best and worst families, respectively, of the Sol da Manhã NF variety), CATB and CATR (the best and worst families, respectively, of the Catetão variety). Each of these sub-populations was evaluated under...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn; Nitrogen efficiency; Nitrogen forms; Nitrogen uptake.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-31312001000100010

Nitrate role in basic cation leaching under no-till
Provedor de dados: 90
Autores: Crusciol,Carlos Alexandre Costa; Garcia,Rodrigo Arroyo; Castro,Gustavo Spadotti Amaral; Rosolem,Ciro Antonio.
Especially under no-tillage, subsuface soil acidity has been a problem, because it depends on base leaching, which has been associated with the presence of low molecular weigth organic acids and companion anions. The objective of this study was to evaluate exchangeable base cation leaching as affected by surface liming along with annual urea side-dressing of maize and upland rice. Treatments consisted of four lime rates (0, 1500, 3000, and 6000 kg ha-1) combined with four nitrogen rates (0, 50, 100, and 150 kg ha-1) applied to maize (Zea mays) and upland rice (Oryza sativa), in two consecutive years. Maize was planted in December, three months after liming. In September of the following year, pearl millet (Pennisetum glaucum) was planted without...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lime; Nitrogen fertilization; Nutrient cycling; Tropical soils.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600014

Nitrogen and sulfate fertilization applied at seeding, via conventional fertilizer and fertilizer containing S0, for corn nutrition and grain yield
Provedor de dados: 22
Autores: Orioli Júnior, Valdeci; Pasquetto, João Vitor Gomes; Cardoso, Saulo Strazeio; Coutinho Neto, André Mendes; Coutinho, Edson Luiz Mendes.
The N and S availability in the early stages of corn development is important that there be no compromising of the crop yield potential. An experiment was carried out in field conditions with the aim to evaluate the effects of nitrogen and sulfated fertilization at maize sowing on nutrition and grain yield, compared to conventional fertilizers and a concentrated formula containing S in its elemental form and also readily available. A randomized block design was adopted with six treatments and four replications. T1, T2, T3 and T4 corresponded to the application 100, 200, 300 and 400 kg ha-1 of the formula 13-33-00 + S 15%, which corresponds, respectively, the following rates NS, kg ha-1: 13-15, 26-30, 39-45 and 52-60. This fertilizer is a granulated mixture...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enxofre; Enxofre elementar; Nitrogênio; Zea mays.
Ano: 2013
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/6267

Nitrogen application timing and soil inorganic nitrogen dynamics under no-till oat/maize sequential cropping
Provedor de dados: 90
Autores: Dieckow,Jeferson; Meurer,Egon José; Salet,Roberto Luiz.
The timing of N application to maize is a key factor to be considered in no-till oat/maize sequential cropping. This study aimed to evaluate the influence of pre-planting, planting and sidedress N application on oat residue decomposition, on soil N immobilisation and remineralisation and on N uptake by maize plants in no-till oat/maize sequential cropping. Undisturbed soil cores of 10 and 20 cm diameter were collected from the 0-15 cm layer of a no-till Red Latossol, when the oat cover crop was in the milk-grain stage. Two greenhouse experiments were conducted simultaneously. Experiment A, established in the 10 cm diameter cores and without plant cultivation, was used to asses N dynamics in soil and oat residues. Experiment B, established in the 20 cm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: N immobilisation; Application timing; No-tillage; Oat residue; Maize.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832006000400011

Nitrogen as top-dressing and sowing densities on agronomic characteristics of maize crop
Provedor de dados: 91
Autores: Serpa,Antoniele de F.; Mendes,Marcelo C.; Faria,Marcos V.; Ávila,Fabricio W. de; Szeuczuk,Kathia; Albuquerque,Carlos J. B.
ABSTRACT The main objective of this study was to evaluate the agronomic characteristics of commercial maize hybrids with modern and old architecture, under the influence of nitrogen (N) as top dressing with different plant populations. Two independent experiments were conducted, one in the municipality of Guarapuava (reduced spacing = 0.45 m) and the other in the municipality of Laranjeiras do Sul (conventional spacing = 0.90 m), in the Paraná state, Brazil, in the 2012/2013 growing seasons. The experiments were set in a randomized block design, with three replicates, in a factorial scheme (6 x 3 x 3), corresponding to six maize hybrids (with modern and old architecture), three plant populations (60000, 75000 and 90000 plants ha-1) and three N doses as top...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant architecture; Grain yield; Zea mays.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001000703

Nitrogen Availability from Potato-Processing Wastewater for Growing Corn
Provedor de dados: 18
Autores: Smith, J.H.; Hayden, C.W.
Tipo: Article
Palavras-chave: Corn / maize; Potato; Mass Import - autoclassified (may be erroneous).
Ano: 1984
URL: http://eprints.nwisrl.ars.usda.gov/414/1/521.pdf

Nitrogen efficiency in oats on grain yield with stability
Provedor de dados: 91
Autores: Silva,José A. G. da; Goi Neto,Constantino J.; Fernandes,Sandra B. V.; Mantai,Rubia D.; Scremin,Osmar B.; Pretto,Rafael.
ABSTRACT Nitrogen (N) is the nutrient most absorbed by the oat crop. Unfavorable climate conditions decrease its efficiency, generating instability and reduction in yield. The objective of this study was to improve N use efficiency in oat grain yield by the economic value of the product and of the input and by models that scale the stability, considering systems of succession of high and reduced residual-N release in favorable and unfavorable years for cultivation. The study was conducted in the years 2013, 2014 and 2015 in two systems of succession (soybean/oat, maize/oat) in randomized blocks with eight replicates, using the N-fertilizer doses of 0, 30, 60 and 120 kg ha-1. The N-fertilizer dose for maximum economic efficiency in oats should be considered...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena Sativa; C/N; Predictability; Biometric models; Optimization.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001201095

Nitrogen efficiency in wheat yield through the biopolymer hydrogel
Provedor de dados: 91
Autores: Mamann,Ângela T. W De; Silva,José A. G. da; Scremin,Osmar B.; Mantai,Rubia D.; Scremin,Ari H.; Dornelles,Eldair F.
ABSTRACT Nitrogen use efficiency in wheat biomass and grain yields can be favored by the biopolymer hydrogel. The objective of the study was to analyze the use of the biopolymer hydrogel applied to the seed in the optimization of fertilizer-N on wheat biomass and grain yields, under different conditions of agricultural year and succession systems of high and reduced release of residual-N. In the study, two experiments were conducted, with different farming systems, soybean/wheat and maize/wheat, one to quantify the biomass yield rate and the other to determine grain yield. The experiments were conducted in the years 2014 and 2015, in a randomized block design with four replicates in a 4 x 4 factorial scheme, corresponding to hydrogel doses (0, 30, 60 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Simulation; Farming systems; Water stress.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001000697

Nitrogen fertilization by deep bedding swine production and its effects on dry matter production and accumulation of nutrients by maize
Provedor de dados: 70
Autores: Campos,Alessandro T.; Veloso,Alessandro V.; Silva,Enilson B.; Yanagi Júnior,Tadayuki; Mattioli,Matheus C.
The goal of this study was to evaluate the nitrogen fertilization as deep litter for pigs in order to produce biomass and accumulate nutrients by the corn. A deep litter made of rice husk as organic compound, from a commercial pig farm during finishing phase, was used. After three consecutive batches of pigs, the deep litter was subjected to a maturation period of 50 days, and samples of this material were taken for analysis of agronomic value. The experimental design was completely randomized with five replicates. The treatments consisted of doses of 0, 75, 150 and 300mg dm-3 of N of deep litter, as well as an additional treatment with ammonium sulfate, with a dosage of 150mg dm-3 of N. After 45 days, corn plants were harvested in order to evaluate the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pig farming; Pig facilities; Alternative management; Waste treatment; Organic fertilizer; Zea mays.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000600018

Nitrogen fertilization by deep-bedding swine production and its effects on the properties of a Quartzarenic Neosol
Provedor de dados: 70
Autores: Campos,Alessandro T.; Veloso,Alessandro V.; Silva,Enilson de B; Yanagi Junior,Tadayuki; Klosowski,Elcio S.
The objective of this study was to evaluate the effects of the nitrogen fertilization in the form of swine deep bed in the properties of a quartz-sand neosol. The organic compound used was the deep bed made with rice hulls, from a commercial swine finishing system farm. Deep bed samples have been collected at various points in the installation in order to obtain a representative composite sample which has been fractionated in a 2.0 mm sieve and submitted to a 50-day maturation period. Then, agronomic value analyses were done. The experimental design was completely randomized. The treatments consisted of 0; 75; 150 and 300 mg dm-3 of N doses of deep bed as well as an additional treatment with ammonium sulfate at a 150 mg dm-3 of N. The experimental period...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Swine production; Swine buildings; Alternative management; Waste treatment; Organic fertilizer; Quartz-sand neosol.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000400015

Nitrogen fertilization impact on agronomic traits of maize hybrids released at different decades
Provedor de dados: 86
Autores: Sangoi,Luís; Ender,Márcio; Guidolin,Altamir Frederico; Almeida,Milton Luiz de; Konflanz,Valmor Antônio.
Genetic selection of maize hybrids is often conducted using high N rates during the breeding cycle. This procedure may either lead to the release of genotypes that present nitrogen luxury consumption or require a stronger N input to accomplish their yield potential. This work was carried out to evaluate the effects of N rates on grain yield and N use efficiency of hybrids cultivated in different decades in Southern Brazil. The trial was performed in Lages, Santa Catarina State. A split plot design was used. Hybrids Ag 12, Ag 28, Ag 303 and Ag 9012, released during the 60's, 70's, 80's and 90's, respectively, were evaluated in the main plots. Nitrogen rates equivalent to 0, 50, 100 and 200 kg ha-1 were side-dressed in the split-plots when each hybrid had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Hybrids; Absorption; Crop yield.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000500005

Nitrogen fertilization sources and insecticidal activity of aqueous seeds extract of Carica papaya against Spodoptera frugiperda in maize
Provedor de dados: 118
Autores: Figueroa-Brito,Rodolfo; Villa-Ayala,Patricia; López-Olguín,Jesús F; Huerta-de la Peña,Arturo; Pacheco-Aguilar,Juan R; Ramos-López,Miguel A.
R. Figueroa-Brito, P. Villa-Ayala, J.F. López-Olguín, A. Huerta-de la Pena, J.R. Pacheco-Aguilar, and M.A. Ramos-López. 2013. Nitrogen fertilization sources and insecticidal activity of aqueous seeds extract of Carica papaya against Spodoptera frugiperda in maize. Cien. Inv. Agr. 40(3): 567-577. The damage caused by the fall armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) to vegetative-stage maize cultivated with chemical nitrogen fertilizers, vermicompost, and Carica papaya L. (Caricaceae) seed extract was estimated. Each shoot was infested with one first instar larva of S. frugiperda. The variables measured included the percentage of germination, length of the second and fifth leaves, stem diameter and plant height, and the estimation of...
Tipo: Journal article
Palavras-chave: Aqueous extract; Caricaceae; Chemical fertilizers; Damage; Fall armyworm; Spodoptera frugiperda.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300009

Nitrogen fixation by groundnut and velvet bean and residual benefit to a subsequent maize crop
Provedor de dados: 86
Autores: Okito,Ambate; Alves,Bruno José Rodrigues; Urquiaga,Segundo; Boddey,Robert Michael.
Chemical fertilisers are rarely avaiable to poor farmers, for whom the nitrogen (N) is often the most limiting element for cereal grain production. The objective of this study was to quantify the contribution of biological nitrogen fixation (BNF) to groundnut (Arachis hypogaea) and velvet bean (Mucuna pruriens) crops using the 15N natural abundance (delta15N) technique and to determine their residual effect and that of a natural fallow, on growth and N accumulation by two rustic maize varieties. The contribution of BNF calculated from delta15N data was 40.9, 59.6 and 30.9 kg ha-1, for groundnut, velvet bean and the natural fallow, respectively. The only legume grain harvested was from the groundnut, which yielded approximately 1.000 kg ha-1. The subsequent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arachis hypogaea; Mucuna pruriens; Zea mays; 15N natural abundance technique; Green manures; N balance; Small-holder producers.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004001200004

Nitrogen Gradients and Nitrification Associated with Decomposing Corn Plants and Barley Straw in Soil
Provedor de dados: 18
Autores: Smith, J.H.
Tipo: Article
Palavras-chave: Corn / maize; Nitrogen; Mass Import - autoclassified (may be erroneous).
Ano: 1967
URL: http://eprints.nwisrl.ars.usda.gov/559/1/74.pdf

Nitrogen leaching losses and balances in conventional and organic farming systems in Kenya
Provedor de dados: 21
Autores: Musyoka, Martha W.; Adamtey, Noah; Muriuki, Anne W.; Bautze, David; Karanja, Edward N.; Mucheru-Muna, Monica; Fiaboe, Komi K.M.; Cadisch, Georg.
Organic farming has been proposed as a solution to foster agricultural sustainability and mitigate the negative environmental impacts of conventional farming. This study assessed N losses and soil surface N balances in conventional and organic farming systems in a sub-humid and semi-humid (Chuka and Thika) sites in Kenya. Nitrate–N (NO3−–N) leached was trapped at 1 m depth using the Self Integrating Accumulator core method and the changes in mineral-N were assessed at different soil depths and different crop growth stages. Both conventional and organic farming systems lost substantial amounts of NO3−–N at the early growth stages of all the crops. Cumulative NO3−–N leached was similar in all the farming systems in each cropping season. More NO3−–N was...
Tipo: Journal paper
Palavras-chave: Air and water emissions; Africa.
Ano: 2019

Nitrogen placement, row spacing, and furrow irrigation water positioning effects on corn yield
Provedor de dados: 18
Autores: Lehrsch, Gary A.; Sojka, R.E.; Westermann, D.T.
Tipo: Article
Palavras-chave: Corn / maize; Mass Import - autoclassified (may be erroneous).
Ano: 2000
URL: http://eprints.nwisrl.ars.usda.gov/121/1/1043.pdf

Nitrogen placement, row spacing, and water management for furrow-irrigated field corn
Provedor de dados: 18
Autores: Lehrsch, G.; Sojka, R.; Westermann, D.
Banding and sidedressing nitrogen (N) fertilizer on a never-irrigated side of a row of corn  (Zea mays L.) were hypothesized to maintain yield and decrease nitrate leaching. In a two—year  ?eld study on a Portneuf silt loam (Durinodic Xeric Haplocalcid) in southern Idaho, we  evaluated effects on yield and N uptake of 1) urea placement (broadcast pre-plant vs. band at  planting), 2) row spacings (30-in vs. an offset 22—in spacing in which every pair of 22-—in rows  was positioned close to a furrow rather than each row on a bed center), and 3) water  management. Our water management, termed irrigated furrow positioning, consisted of every-  second furrow irrigation in which we applied water to either a) the same or b) the Opposite side  of the row with...
Tipo: Conference or Workshop Item
Palavras-chave: Corn / maize; Water management; Mass Import - autoclassified (may be erroneous).
Ano: 2008
URL: http://eprints.nwisrl.ars.usda.gov/1267/7/1243.pdf

Nitrogen release and synchrony in organic and conventional farming systems of the Central Highlands of Kenya
Provedor de dados: 21
Autores: Musyoka, Martha W.; Adamtey, Noah; Bünemann, Else K.; Muriuki, Anne W.; Karanja, Edward N.; Mucheru-Muna, Monica; Fiaboe, Komi K.M.; Cadisch, Georg.
To match Nitrogen (N) supply to crop N demand, it is essential to understand N release and uptake patterns in different farming systems and crops. To assesses the dynamics of N released in organic and conventional systems and potential synchrony and asynchrony in crop N uptake, a study was conducted over three cropping seasons (potato, maize and leafy vegetables) at two sites in the Central Highlands of Kenya. Mineral-N release and synchrony were monitored in conventional and organic systems at high (recommended N, P, pesticides and irrigation) and low input (low N, P, pesticide use and rainfed) systems. Mineral-N release was assessed using in situ buried bags and N synchrony was measured by the daily differences in N fluxes. The percentage of N applied...
Tipo: Journal paper
Palavras-chave: Soil quality; Composting and manuring; Africa.
Ano: 2019

Nitrogen Response and Economics for Irrigated Corn in Nebraska
Provedor de dados: 18
Autores: Dobermann, A.R.; Wortmann, C.S.; Ferguson, R.B.; Hergert, G.W.; Shapiro, C.A.; Tarkalson, D.D.; Walters, D.T.
Nitrogen management recommendations may change as yield levels and efficiency of crop production increase.  The mean yield with adequate nutrient availability in 32 irrigated corn (Zea mays L.) trials conducted across Nebraska to evaluate crop response to split-applied N was 14.8 Mg per ha. The mean economically optimal N rates (EONR) for irrigated corn varied with the fertilizer N to grain price ratio.  At a fertilizer N:corn price ratio of 7, the EONR was 171, 122, and 93 kg per hectare, respectively, for cropping systems with corn following corn (CC), soybean (Glycine max L.) (CS), and drybean (Phaseolus vulgaris L.) (CD).  At this price ratio the present  University of Nebraska (UNL) recommendation procedure gave mean N  recommendations that were 17.2,...
Tipo: Article
Palavras-chave: Corn / maize; Nitrogen.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1415/1/1385.pdf

Nitrogen symbiotically fixed by cowpea and gliricidia in traditional and agroforestry systems under semiarid conditions
Provedor de dados: 86
Autores: Martins,Júlio César Rodrigues; Freitas,Ana Dolores Santiago de; Menezes,Rômulo Simões Cezar; Sampaio,Everardo Valadares de Sá Barretto.
The objective of this work was to estimate the amounts of N fixed by cowpea in a traditional system and by cowpea and gliricidia in an agroforestry system in the Brazilian Northeast semiarid. The experiment was carried out in a randomized complete block design, in a split-plot arrangement, with four replicates, in the semiarid region of the state of Paraíba, Brazil. Plots consisted of agroforestry and traditional systems (no trees), and split-plots of the three crops planted between the tree rows in the agroforestry system. To estimate N fixation, plant samples were collected in the fourth growth cycle of the perennial species and in the fourth planting cycle of the annual species. In the agroforestry system with buffel grass and prickly-pear cactus,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gliricidia sepium; Vigna unguiculata; Biological nitrogen fixation; Natural abundance; 15N.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000200178

Nitrogen use efficiency of 15N-labelled sheep manure and mineral fertiliser applied to microplots in long-term organic and conventional cropping systems
Provedor de dados: 21
Autores: Bosshard, C.; Sørensen, P.; Frossard, E.; Mayer, J.; Mäder, P.; Nanzer, S.; Oberson, A.
Nitrogen (N) utilisation by crops has to be improved to minimize losses to the environment. We investigated N use efficiency of animal manure and mineral fertiliser and fate of fertiliser N not taken up by crops in a conventional (CONMIN) and a bioorganic (BIOORG) cropping system of a long-term field experiment over three vegetation periods (winter wheat–soybean–maize). Microplots planted with wheat received a single application of 15N-labelled slurries (either urine or faeces labelled) or mineral fertiliser. At the end of each vegetation period we tested whether higher microbial activity and larger microbial biomass in BIOORG than CONMIN soils, and lower long-term N input level in BIOORG, affected use efficiency and fate of fertiliser N not taken up by...
Tipo: Journal paper
Palavras-chave: Soil.
Ano: 2009
URL: http://orgprints.org/26369/1/Bosshard_etal_2009_NCA83.pdf

Nitrogen Use Efficiency of Irrigated Corn for Three Cropping Systems in Nebraska
Provedor de dados: 18
Autores: Wortmann, C.S.; Tarkalson, D.D.; Shapiro, C.A.; Dobermann, A.R.; Ferguson, R.B.; Hergert, G.W.; Walters, D.T.
Nitrogen use efficiency (NUE) is of economic and environmental importance.  Components of NUE were evaluated in 32 irrigated corn (Zea mays L.) trials conducted across Nebraska with different N rates and where the previous crop was either corn (CC), drybean  (Phaseolus vulgaris L.) (CD), or soybean (Glycine max L.) (CS).  The mean grain yield with adequate nutrient availability was 14.7 Mg ha–1 .  When no N was applied, measured soil properties and irrigation water N accounted for &lt;20% of the variation in plant N  uptake (UN).  Mean fertilizer N recovery in above-ground biomass was 74% at the lowest N rate compared with 40% at the highest N rate, a mean of 64% at the economically optimal N rate (EONR), and least with CD.  Agronomic efficiency of...
Tipo: Article
Palavras-chave: Corn / maize; Nitrogen.
Ano: 2011
URL: http://eprints.nwisrl.ars.usda.gov/1414/1/1384.pdf

Nitrogênio em cobertura no feijoeiro cultivado em plantio direto sobre diferentes coberturas vegetais - DOI: 10.4025/actasciagron.v31i1.6637
Provedor de dados: 1
Autores: Silva, Tiago Roque Benetoli da; FAG; Grutka, Gustavo Henrique Hoff; UCDB; Maia, Suelen Cristina Mendonça; UEMS; Freitas, Lucas Barbosa de; UEMS.
O trabalho teve como objetivo avaliar o efeito da aplicação ou não de nitrogênio em cobertura em feijão “das águas”, cultivado após diferentes coberturas vegetais. O experimento foi conduzido em Campo Grande, Estado de Mato Grosso do Sul. O delineamento experimental foi o de blocos casualizados, em esquema de parcelas subdivididas, com quatro repetições. As parcelas foram constituídas por diferentes coberturas vegetais (milho adensado, algodão e trigo) e as subparcelas, pela aplicação ou não de nitrogênio em cobertura (0 e 70 kg ha-1). A semeadura do feijão (Carioca Precoce) foi realizada em setembro de 2005. Foram realizadas as seguintes avaliações: ciclo, população de plantas, componentes da produção, massa de 100 grãos, produtividade, matéria seca na...
Palavras-chave: 5.01.03.04-0 Produção de Mudas Feijão “das águas”; Phaseolus vulgaris L.; Adubação nitrogenada. water season; Phaseolus vulgaris L.; Nitrogen fertilization.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6637

Nitrogênio no feijoeiro em sistema de plantio direto sobre gramíneas - DOI: 10.4025/actasciagron.v30i3.3549
Provedor de dados: 1
Autores: Gomes Junior, Francisco Guilhien; ESALQ/USP; Sá, Marcos Eustáquio de; FAE/UNESP; Valério Filho, Walter Veriano; FAE/UNESP.
O adequado suprimento de N é primordial para se obter alta produtividade de sementes de feijão, entretanto, as respostas a esse nutriente, em sistema de plantio direto, podem variar em função da espécie e quantidade de palha. O objetivo do trabalho foi avaliar a resposta do feijoeiro à aplicação de N, em sistema de plantio direto, sobre palhada de milho, milheto e braquiária. Foram realizados três experimentos, um para cada espécie de gramínea. O delineamento experimental foi o de blocos casualizados disposto em esquema fatorial 5x2x2, correspondente a cinco doses de N (0, 30, 60, 90, 120 kg ha-1) aplicadas em duas épocas da fase vegetativa (3ª e 6ª folha trifoliolada) e duas cultivares (IPR Juriti e Pérola), com quatro repetições. A cultivar IPR Juriti...
Palavras-chave: 5.01.00.00-9 Agronomia Phaseolus vulgaris L.; Palhada  adubação nitrogenada; Fenologia; Rendimento de sementes 5.01.03.00-8 Fitotecnia Phaseolus vulgaris L.; Mulching; Nitrogen fertilizer; Phenology; Seed yield.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3549

Níveis de adubação para culturas consorciadas: efeito de nitrogênio e fósforo sobre as culturas de milho (Zea mays L.) e caupi (Vigna unguiculata (L.) Walp.).
Provedor de dados: 14
Autores: MORGADO L. B.; LIMA, M. G.; LIMA FILHO, J. M. P.
Um trabalho versando sobre o efeito da aplicação de doses de nitrogênio e fósforo nas culturas de milho e caupi, em plantios solteiro e consorciado, foi conduzido em condições de sequeiro no semi-árido do Nordeste Brasileiro.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cultivo; Caupi; Maize; Milho; Adubação; Vigna Unguiculata; Zea Mays.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/966302

Níveis de inclusão do resíduo do milho (mazoferm), em substituição ao farelo de soja para vacas em lactação - DOI: 10.4025/actascianimsci.v30i1.3607
Provedor de dados: 2
Autores: Silva, Maria Josilaine Matos dos Santos; UFRPE; Ferreira, Marcelo de Andrade; UFRPE; Melo, Airon Aparecido Silva de; UFRPE; Monteiro, Maria Carolina Costa; FACEPE; Ferreira, Bárbara Ferraz; FACEPE; Ribeiro, Valéria Louro; UFRPE.
O experimento foi realizado com o objetivo de avaliar níveis (0,0; 3,5; 7,0; 10,5 e 14,0%) de resíduo da maceração do milho em substituição ao farelo de soja sobre o consumo, digestibilidade e produção de leite em vacas mestiças em lactação. O delineamento experimental foi o quadrado latino (5x5). Foi observada uma diminuição dos consumos de matéria seca (16,27 kg dia-1, 3,57% PV e 159,60 g kg-0,75). As demais variáveis acompanharam seu comportamento, exceto o consumo de nutrientes digestíveis totais (11,46 kg dia-1) que não sofreu alteração. Observou-se que os coeficientes de digestibilidade aparente de todos os nutrientes não foram alterados. A produção de leite, a produção de leite corrigido para o teor de gordura e a percentagem de gordura do leite...
Palavras-chave: 5.04.00.00-2    Zootecnia bovino de leite; Proteína; Resíduo industrial 5.04.03.00-1    Nutrição e Alimentação Animal.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/3607

Nivel crítico del agua en el suelo para decidir la siembra en agricultura de zonas áridas: (con 4 figuras y 1 tabla)
Provedor de dados: 85
Autores: López-Martínez,José Dimas; Salazar-Sosa,Enrique; Vázquez-Vázquez,Cirilo; Figueroa-Viramontes,Rafael; Berumen-Padilla,Salvador; Martinez-Rubin,Enrique.
Taking under consideration that potential evapotranspiration normally exceeds the growing season rainfall and that a water shortage can occur unless a reserve of soil water is stored before the crop is planted, it can be concluded that the amount of stored soil water at sowing time is a critical factor in the success of dryland cropping systems. The main aim of this investigation was to know if interaction c2 test is a valuable tool, when taking into account stored soil (0-60 cm depth) water at sowing time and maize grain yield, in making decision for sowing or not sowing at a given time. Data on the amount of soil water at sowing time and maize grain yield from four experiments carried out during 2001 and 2002 at the Ejido Francisco Villa, Lerdo, Durango,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genotypes; Interaction c2 test; Grain yield.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100034

No plantio direto o milho e o melhor.
Provedor de dados: 14
Autores: CRUZ, J. C.
bitstream/item/41024/1/Plantio-direto.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Maize; No-till.; Milho; Plantio Direto; Zea Mays.; Tillage.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/482986

Non adoption of improved maize varieties in East Timor
Provedor de dados: 31
Autores: Gregg,   Daniel.
East Timor formally obtained its independence in 2002 following a protracted period of occupation by Indonesia which ended in 1999. It was initially faced with a series of issues such as a low level of infrastructure, poor quality germplasm for the major staple crops, and being one of the world’s poorest nations (Piggin and Palmer, 2003). Many East Timorese experience annual periods of food shortage, sometimes exacerbated by droughts and pest damage (Piggin and Palmer, 2003). In response to a shortage of suitably adapted varieties for the major staple crops of East Timor, a project called Seeds of Life was developed in 2000 to locate and test local and international crop varieties with the aim of improving the germplasm stock in the country (Piggin and...
Tipo: Conference Paper or Presentation
Ano: 2009
URL: http://purl.umn.edu/48159

Non-tariff barriers in EAC customs union: implications for trade between Uganda and other EAC countries
Provedor de dados: 31
Autores: Okumu,   Luke; Nyankori,   James Cyprian Okuk.
A key objective for the adoption of East African Community (EAC) Customs Union was to enhance economic gains through elimination of tariffs and non-tariff barriers (NTBs) within the member states. This study has established that several NTBs continue to exist, and some have persisted. The NTBs that have persisted for more than three years include a long list of customs documentation requirements, cumbersome formalities, and limited testing and certification arrangements. Other NTBs that still exist include: un-standardized weighbridges; several road blocks; lack of recognition of individual country’s standards; and the existence of several un-harmonised standards. The simulation results of spatial equilibrium model of maize trade with and without NTBs show...
Tipo: Report
Palavras-chave: Non-tariff barriers; East African Community; EPRC; Uganda; Agribusiness; Agricultural Finance; Community/Rural/Urban Development; Consumer/Household Economics; Financial Economics; Industrial Organization; Labor and Human Capital; Productivity Analysis; Public Economics.
Ano: 2010
URL: http://purl.umn.edu/113621

Notas prévias sobre seleção no milho dentado composto.
Provedor de dados: 14
Autores: PATERNIANI, E.; MEDEIROS, J. B. S. de.
bitstream/item/154158/1/Bol-inf124.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pará; Amazonas; Brasil; Maize; Selection.; Milho; Seleção.
Ano: 1967
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382515

No-till cultivation of maize in rolled forage peas
Provedor de dados: 21
Autores: Dierauer, Hansueli; Siegrist, Franziska; Weidmann, Gilles.
The practice abstract explains herbicide-free no-till maize cultivation in a rolled green manure for the conservation of soil quality and reduction of soil compaction.
Tipo: Report
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Soil tillage Root crops.
Ano: 2017
URL: http://orgprints.org/32755/1/No-till%20cultivation%20of%20maize%20in%20rolled%20forage%20peas.pdf

No-till cultivation of maize in rolled forage peas
Provedor de dados: 21
Autores: Dierauer, Hansueli; Siegrist, Franziska; Weidmann, Gilles.
The non-tilled, constantly covered soil has improved water retention and also shows a better carrying capacity during harvest, and is less affected by weed infestation, compaction, nutrient-leaching, and erosion. Stockless farms especially benefit from the nitrogen input of the legume-green manure.   • At the beginning of August, carry out 1 to 2 stubble-tillage operations after cereal or rape harvest.   • Sow the wintering forage peas in October.  • At the end of May, kink the peas' stems with a knife-cylinder roller, after which you drill in the maize with row cleaners. The green manure lying on the ground must be properly dried off for sowing.  • The mineralisation performance, lowered due to the soil cover, can be compensated for with focused nitrogen...
Tipo: Practice tool
Palavras-chave: Production systems Cereals; Pulses and oilseeds Soil tillage.
Ano: 2017
URL: http://orgprints.org/31020/33/PA_005_Direct-sowing-maize_final_QR.pdf

Novo ciclo de seleção na população de milho CMS 14 no Amapá.
Provedor de dados: 14
Autores: BEZERRA, V. S.; CAVALCANTE, E. da S.
Este trabalho de melhoramento iniciado em 1984, a partir da população CMS 14 (Pool 25), tem por objetivo obter uma variedade de milho mais produtiva e adaptada as condições de várzea que as cultivares em uso.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Amapá; Maize.; Milho; Variedade; Zea Mays.; Várzea; Brazil; Varieties.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/341803

N-partitioning, nitrate reductase and glutamine synthetase activities in two contrasting varieties of maize
Provedor de dados: 86
Autores: Machado,Altair Toledo; Sodek,Ladaslav; Fernandes,Mânlio Silvestre.
In order to identify useful parameters for maize genetic breeding programs aiming at a more efficient use of N, two maize varieties of contrasting N efficiency, Sol da Manhã NF (efficient) and Catetão (inefficient) were compared. Experiments were carried out under field and greenhouse conditions, at low and high N levels. The parameters analysed included total and relative plant and grain N content, biomass and the activities of nitrate reductase and glutamine synthetase in different parts of the plant. It was found that the translocation efficiency of N and photoassimilates to the developing seeds and the source-sink relations were significantly different for the two varieties. N content of the whole plant and grain, cob weight and the relative ear dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrient transport; Nitrogen; Grain; Source sink relations; Plant breeding.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000200006

Number of experiments for adaptability and stability analysis in maize by Lin and Binns method
Provedor de dados: 65
Autores: Cargnelutti Filho,Alberto; Guadagnin,José Paulo.
ABSTRACT: The objective of this study was to determine the necessary number of experiments to analyze the adaptability and stability of maize cultivars (Zea mays L.) using the Lin and Binns method. Grain yield data extracted from 63 maize cultivar trials were used. Trials were divided in six groups of experiments, according to the cycle (early and super early) and the agricultural year (2002/2003, 2003/2004, and 2004/2005). In each group, from the set of all experiments (reference file) new data files were formed by combinations in groups of 2, 3, 4, ..., n-1 experiments, with a total of 10,683 files. For each file, the estimation of the adaptability and stability parameter (Pi) of the Lin and Binns method was calculated. To verify the degree of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Genotype x environment interaction; Cultivar indication.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000300201

Number of recombinations and genetic properties of a maize population undergoing recurrent selection
Provedor de dados: 63
Autores: Lima Neto,Francisco Pinheiro; Souza Júnior,Cláudio Lopes de.
In maize recurrent selection programs, selected genotypes were recombined once to generate genetic variability for the next selection cycle. Selection generates negative gametic phase disequilibrium which reduces genetic variances, and this disequilibrium is not significantly reduced with only one generation of recombination. The objective of this research was to assess the effects of one additional generation of recombination on phenotypic and genotypic parameters in a maize population undergoing recurrent selection. Selected progenies of the EPB-4 population were subjected to one and two generations of recombination, and from each generation half- and full-sib progenies were developed and evaluated at three environments for grain yield, plant and ear...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize improvement; Heritability coefficients; Genetic correlations.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000100007

Nutrição do milho e da Brachiaria decumbens cultivados em consórcio em diferentes preparos do solo - DOI: 10.4025/actasciagron.v30i5.5975
Provedor de dados: 1
Autores: Cruz, Simério Carlos Silva; UNESP; Pereira, Francisco Rafael da Silva; UNESP; Bicudo, Silvio José; UNESP; Albuquerque, Abel Washington de; UFAL; Santos, José Roberto; UFAL; Machado, Carla Gomes; UNESP.
O objetivo deste trabalho foi avaliar sistemas de consorciação entre milho e Brachiaria decumbens e seus efeitos sobre a nutrição mineral das culturas. O experimento foi conduzido no ano agrícola de 2005, na Área Experimental do Campus Delza Gitaí, pertencente ao CECA-UFAL. Os tratamentos consistiram do cultivo de um híbrido de milho BRS 3150, nos sistemas: Preparo Convencional do Solo, Cultivo Mínimo e Semeadura Direta (BRS 3150 em consórcio com Brachiaria decumbens). O experimento obedeceu ao esquema de blocos casualisados com parcelas subdivididas em quatro repetições. Durante o período de florescimento da cultura do milho, foram coletadas folhas da base da espiga para análise nutricional. Foram realizadas coletas de material vegetal da Brachiaria...
Palavras-chave: 5.02.01.07-7 Solos Florestais teores de macronutrientes; Massa seca; Material vegetal macronutrients levels; Dry matter; Plant matter.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5975

Nutrição e adubação do milho.
Provedor de dados: 14
Autores: BAHIA FILHO, A. F. C.; VASCONCELLOS, C. A.; SANTOS, H. L. dos; FRANCA, G. E. de; PITTA, G. V. E.
Transporte de nutrientes no solo; Exigencias minerais; Nutrientes essenciais; Sintomas de deficiencia; Acidez do solo e calagem.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fertilizacao; Maize; Fertilization.; Milho; Nutrição; Zea Mays.; Nutrition.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476104

Nutrient deficiency symptoms of corn
Provedor de dados: 106
Autores: Sorasith Vacharotayan; McCall, Wade W.
Palavras-chave: Corn; Maize; Nutrient deficiencies; Deficiency symptoms; ข้าวโพด; การขาดธาตุอาหาร; อาการขาดธาตุอาหาร.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3747

Nutrient elasticities among Nigerian households differentiated by income
Provedor de dados: 31
Autores: Akinleye,   S.O.; Rahji,   M.A.Y.
Food calorie intake has been found to have a strong empirical linkage with both human health and productivity. In a study to determine the probable influence of price and income changes on the availability of food nutrients to Nigerian households segmented by income, demand elasticities were obtained for survey respondents and the nutritional effects of changes arising from changes in income and prices were computed using both the AIDS methodology and a technique developed by Huang. The findings show that guinea corn is the food that would have the greatest implications for the nutrient status of low income households. Millet, guinea corn and maize and rice, beans and maize respectively are the food items of note for the households whose heads earn average...
Tipo: Journal Article
Palavras-chave: Food demand; Income; Almost ideal demand system (AIDS); Nigeria; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety.
Ano: 2007
URL: http://purl.umn.edu/10126

Nutrient export to an Eastern Atlantic coastal zone: first modeling and nitrogen mass balance
Provedor de dados: 5
Autores: Canton, Mathieu; Anschutz, Pierre; Coynel, Alexandra; Polsenaere, Pierre; Auby, Isabelle; Poirier, Dominique.
We have studied 15 catchments supplying freshwater to a French Atlantic coastal lagoon, where increase in nitrogen loads due to agriculture is supposed to have destabilized the ecosystem in the last decades. The catchment is a lowland composed of Pleistocene sands with an average slope of 0.25%. To study the nutrient export in relation to land-use surface waters were sampled bi-weekly between October 2006 and January 2009 and land-use was established by plane photographs and Geographic Information System (GIS). Cultivated pine forests represent more than 80% of the total surface and 7% of the catchment area has been deforested recently. Significant areas of some catchments are used for maize crop. Housing is confined to the coastal zone. Maize and forest...
Tipo: Text
Palavras-chave: Nitrogen; Phosphorus; River export; Land use; Coastal catchment; Arcachon Bay; Modeling; Mass balance.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00065/17615/15173.pdf

Nutrient supply by mass flow and diffusion to maize plants in response to soil aggregate size and water potential
Provedor de dados: 90
Autores: Oliveira,Ermelinda Maria Mota; Ruiz,Hugo Alberto; Alvarez V,Víctor Hugo; Ferreira,Paulo Afonso; Costa,Fernanda Oliveira; Almeida,Ivan Carlos Carreiro.
Nutrients are basically transported to the roots by mass flow and diffusion. The aim of this study was to quantify the contribution of these two mechanisms to the acquisition of macronutrients (N, P, K, Ca, Mg, and S) and cationic micronutrients (Fe, Mn, Zn, and Cu) by maize plants as well as xylem exudate volume and composition in response to soil aggregate size and water availability. The experiment was conducted in a greenhouse with samples of an Oxisol, from under two management systems: a region of natural savanna-like vegetation (Cerradão, CER) and continuous maize under conventional management for over 30 years (CCM). The treatments were arranged in a factorial [2 x (1 + 2) x 2] design, with two management systems (CER and CCM), (1 + 2) soil sifted...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cerradão; Continuous maize; Soil water potential.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000200005

Nutrients And Heavy Metals In Maize, Fertilized With Rock Phosphate And Biosolid
Provedor de dados: 107
Autores: Rodrigues, Marcio Neves; Sampaio, Regynaldo Arruda; Zuba Junio, Geraldo Ribeiro; Oliveira, Agda Loureiro Gonçalves.
This study aimed to evaluate effects of rock phosphate and sewage sludge compound fertilization in level of contents of heavy metals and nutrients in two consecutive cultivation of corn grain. The project was conducted in an Haplic Cambisol on a period of days between April 10, 2009 and September 15, 2010.  The treatments in factorial scale 2 by 4 meters corresponds to application on the first corn cultivation of 2 doses of rock gafsa phosphate (0 and 90 kg ha-1 of P2O5) and 4 compound doses of sewage sludge (0; 25; 50 and 75 t ha-1, in dry specimen). The experiment followed random blocks design with three treatments repetition. The fertilization with rock phosphate increased the levels of N, P, K and Mg only in the first corn grain cultivation and did not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic fertilizer; Sewage sludge; Soil pollution.
Ano: 2017
URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/685

Nutrition of monogastrics: A summary of research conducted under the German Federal Programme for Organic Agriculture and other forms of Sustainable Agriculture
Provedor de dados: 21
Autores: ANON, AN.
The thematic focus of monogastric nutrition runs very regularly through the entire federal programme. A strong focus was on the use of feed made from 100% organic origin (EC Eco-Regulation). In experiments in 2006 on the use of roughage in outdoor rearing pigs, for example, it was shown that Jerusalem artichoke can lead to significantly higher weight gains, compared to the control, while weight gain decreased significantly in some cases using other roughages. In another project in 2007, the various processing methods for soybean cake and feed produced therefrom were tested on broiler chickens, laying hens and pigs. The aim was to develop a suitable technology to inactivate the anti-nutritive components in soy and thus to increase the protein digestibility...
Tipo: Other
Palavras-chave: Feeding and growth; Pigs; Poultry.
Ano: 2012
URL: http://orgprints.org/21874/1/BEOL_nutrition%20of%20monogastrics_2012.pdf

Nutrition tests with corn and sorghum
Provedor de dados: 106
14 tables
Palavras-chave: Broiler chickens; Layer chickens; Swine; Corn; Maize; Sorghum; Rations; Ingredients; Nutrition tests; Nutrition value; Protein quality; Opaque-2; Growth; Feed conversion efficiency; ข้าวโพด; ข้าวฟ่าง; คุณค่าทางอาหาร; การวิเคราะห์.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3807

Nutritional characteristics of the diets in organic pig production
Provedor de dados: 21
Autores: Prunier, Armelle; Rudolph, Gwendolyn; Bodicchio, Davide; Butler, Gillian; Dippel, Sabine; Leeb, Christine.
A better knowledge of the rations pigs receive, should help identify weaknesses and hence improve the efficiency of organic pig production. A research project was initiated in 8 EU countries (ProPIG from the ERANET CoreOrganic II) involving 72 farms: 59 with sows (53 farrow-to-finish = FF, 5 with and 1 without weaners), 11 fattening (F) and 2 with weaners and fatteners. Farmers were asked to describe their feeding practices and the nutrient content of feeds used was recorded, either from the manufacturer claim or calculated from ingredients. Four FF farms used a single diet for all pigs. For sows, 46% of the farms fed the same diet. For fatteners, 58% of the farms used a single diet, 38% used two diets and 5% used 3 diets. For weaners, 73% of the farms...
Tipo: Conference paper, poster, etc.
Palavras-chave: Feeding and growth; Pigs.
Ano: 2014
URL: http://orgprints.org/26945/1/EAAP%202014-Prunier-Propig.pdf

Nutritional Consequences of Using Organic Agricultural Methods in Developing Countries
Provedor de dados: 21
Autores: Brandt, Kirsten; Kidmose, Ulla.
In addition to improved yields, the use of organic methods can benefit the nutritional value of foods in several ways, compared with subsistence agriculture, and in some respects also when compared with the use of high-input conventional farming methods. The recycling of organic matter retards depletion of the soil and ensures that increases in yield are not offset by mineral deficiencies caused by unbalanced plant nutrition. City populations can use organic products to minimize their intake of pesticide residues and nitrate. Improved nutritional status of crops under low-input conditions can increase the contents of protein and vitamin A, but can also increase the contents of some anti-nutrients. Improved availability of firewood through agroforestry...
Tipo: Book chapter
Palavras-chave: Food security; Food quality and human health Crop health; Quality; Protection Farming Systems.
Ano: 2003
URL: http://orgprints.org/1570/1/E5_21_05_00_samlet.pdf

Nutritional evaluation of snacks from corn flour produced by village texturizer
Provedor de dados: 106
Autores: Somchai Prabhavat; Yaovadee Cuptapun; Wanpen Mesomya; Pongsri Jittanoonta; Sureepun Bunyawisuthi.
7 tables
Palavras-chave: Corn; Maize; Corn flour; Village texturizer; Nutritional value; Corn snack; ข้าวโพด; ขนมขบเคี้ยว; แป้งข้าวโพด; การผลิตแป้ง.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4379

Nutritional Quality of Eggs of Amberlink and Hyline Layers Fed on Different Levels of Provitamin A-Biofortified Maize
Provedor de dados: 89
Autores: Zeina,GW; Kolanisi,U; Chimonyo,M.
ABSTRACT The study was conducted to determine the interaction of types of maize (Provitamin A-biofortified maize (PABM) versus white maize) and strain of laying birds (Amberlink and Hyline) on nutritional quality of eggs. Twenty-one of each of Amberlink and Hyline laying hens were fed on three diets for 30 days. Birds were distributed in a 3 × 2 factorial arrangement constituting three diets (0, 50 or 100 % of PABM) and two strains (Amberlink &amp; Hyline). There was a diet × strain interaction on egg shell weight, average daily feed intake, egg production, egg weight and egg shell thickness. Eggs produced by layers under 100 % PABM had lighter eggshell weight and lower eggshell percentage. In contrast, eggs produced by layers under 50 % PABM diet had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg productivity; Eggshell quality; Vitamin A; Yolk colour.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000200281

Nutritional status and physiological parameters of maize cultivated with sewage sludge
Provedor de dados: 64
Autores: Moreira,Rodrigo Santos; Lense,Guilherme Henrique Expedito; Fávero,Leonardo Ferreira; Oliveira Junior,Benedito Majela de; Mincato,Ronaldo Luiz.
ABSTRACT The use of sewage sludge as a source of nutrients and organic matter for agricultural soils is a well-established practice. However, few reports highlight the effect of the nutrients and potentially toxic elements provided by organic wastes application on the plant physiological parameters, such as photosynthetic activity and stomatal conductivity. We performed a greenhouse experiment with maize exposed to a dystrophic red Latosol amended with mineral fertilizer and different rates of sewage sludge with the following objectives: i) assess the nutrients and metal uptake translocation and distribution in plants and ii) evaluate the relationship between plant physiological parameters and yield indicators under the study conditions. The application of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosolids; Zea mays; Agricultural production; Heavy metals.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100203

Nutritional value of hay from maize-crop stubble ammoniated with urea
Provedor de dados: 124
Autores: Moreira Filho,Miguel Arcanjo; Alves,Arnaud Azevêdo; Vale,George Emanuel Silva do; Moreira,Antonia Leidiana; Rogério,Marcos Cláudio Pinheiro.
The objective of this research was to evaluate the chemical composition and in situ degradability of hay stubble from a maize crop fertilized with 40; 120 or 200 kg N ha-1, ammoniated with urea. To evaluate in situ degradability, 4 g samples were incubated in nylon bags in the rumen of cattle for 6; 24 and 72 hours. The levels of acid detergent fiber (35.4% DM) and acid detergent insoluble nitrogen (18.5% of total N) decreased, resulting in 32.7% of DM and 9.6% of the total N, and crude protein (CP) increased from 5.2 to 9.7% of DM as a result of the ammoniation with urea. The degradation of dry matter (48.7%), CP (56.5%) and neutral detergent fiber (33.6%) increased with ammoniation, averaging 54.5 and 75.4, and 38.4% respectively, but was not influenced...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Degradation; Hay ammoniated; Maize-crop stubble as forage.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000400028

Nutritive value of corn silage from intensive dairy farms in Brazil
Provedor de dados: 96
Autores: de Oliveira,Isabella Lasmar; Lima,Luciana Miranda; Casagrande,Daniel Rume; Lara,Márcio André Stefanelli; Bernardes,Thiago Fernandes.
ABSTRACT The objective of this research was to characterize the nutritive value of corn silage made on intensive dairy farms and demonstrate the nutritional variations between silages located at the top and at the center of a bunker silo. Thirty-two dairy farms were visited in four Brazilian states. One corn bunker silo of each farm was chosen and samples were collected from the top and center parts. The nutritive value, fermentation end-products, and microbial counts were assessed. The predicted milk was determined by Milk2006 spreadsheet. The mean, standard deviation, maximum, minimum, and 95% confidence interval of all data were calculated. The ash, neutral detergent fiber (NDF), starch, in vitro NDF, and dry matter (DM) digestibility data were compared...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aerobic deterioration; Feed composition; Feed sampling; Maize silage.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000600494

Nutritive value of Suwan1 and hyhrid 2301 corn and KU257 and DA 80 sorghum in normal and sub-normal protein level broiler rations
Provedor de dados: 106
Autores: Prateap Rachapaetayakom; Supaporn Isariyodom.
4 tables
Palavras-chave: Broiler chickens; Rations; Proteins; Corn; Maize; Sorghum; Nutritive value; Suwan 1; Hybrid 2301; KU 257; DA 80; Feeds; Ingredients; Feeding; Growth; Feed conversion efficiency; Feed intake; ข้าวโพด; ข้าวฟ่าง; คุณค่าทางอาหาร; พันธุ์สุวรรณ 1; พันธุ์ลูกผสม; พันธุ์สุวรรณ 2301; พันธุ์เคยู 257; พันธุ์ดีเอ 80; ระดับของโปรตีน; สูตรอาหาร; ไก่กระทง.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4118

O CRESCIMENTO ECONÔMICO AGRÍCOLA DOS ESTADOS DA REGIÃO SUDESTE DO BRASIL – 1995/2005
Provedor de dados: 31
Autores: Junqueira,   Clarissa Pereira; Sterchile,   Shirla Patricia Weber; Lima,   Jandir Ferrera de.
This article analyzes the economic growth of agricultural activities and the profile of the agricultural area of the states in the southeastern region of Brazil, between 1995 and 2005. Pointers referring to the farming sector of the region’s states were used. The study shows that the process of economic growth in the region was dynamic in the states of São Paulo and Minas Gerais and was centered on exportation products, mainly sugar cane, soy and maize. In the states of Rio de Janeiro and Espírito Santo, however, there was a decrease of the farming GIP. The region’s exportation guideline presented significant alterations from the decade of 1990, a period in which the exportation of basic products lost importance and was replaced by the manufacturing, a...
Tipo: Journal Article
Palavras-chave: Agrarian economy; Rural development; Agricultural policy; Agribusiness; Agricultural Finance; Industrial Organization.
Ano: 2009
URL: http://purl.umn.edu/90691

O milho na Amazônia brasileira.
Provedor de dados: 14
Autores: SANTOS, A. I. M. dos; ALBUQUERQUE, M. de; PEREIRA, O. G.
bitstream/item/161705/1/FL00617-.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Aspecto econômico; Cultivo; Brasil; Maize; Economic aspect; Cultivation.; Milho; Pesquisa; Zea Mays.; Amazonia; Research.
Ano: 1971
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/374591

O milho que o Brasil planta.
Provedor de dados: 14
Autores: CRUZ, J. C.; PEREIRA FILHO, I. A.; GAMA, E. E. G. e; FALCAO, F. T.; CORREA, L. A.
bitstream/item/45204/1/Milho-Brasil.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Variedades; Brasil; Maize.; Milho; Zea Mays.; Brazil; Varieties.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484143

O problema técnico-econômico da adubação
Provedor de dados: 43
Autores: Zagatto,A. G.; Gomes,F. Pimentel.
The authors discuss from the economic point of view the use of a few functions intended to represent the yield y corresponding to a level xof the nutrient. They point out that under conditions of scarce capital what is actually most important is not to obtain the highest profit per hectare but the highest return per cruzeiro spent, so that we should maximize the function z = _R - C_ = _R_ - 1 , C C where R is the gross income and C the cost of production (fixed plus variable, both per hectare). Being C = M + rx, with r the unit price of the nutrient and Af the fixed cost of the crop, wo are led to the equation (M + rx)R' - rR = 0. With R = k + sx + tx², this gives a solution Xo = - Mt - √ M²t² - r t(Ms - Kr)- _____________________ rt on the other hand,...
Tipo: Info:eu-repo/semantics/article
Ano: 1960
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761960000100016

Objectives and breeding procedures in maize
Provedor de dados: 106
Autores: Dhawan, N.L.
Palavras-chave: Corn; Maize; Corn breeding; Plant breeding; ข้าวโพด; การปรับปรุงพันธุ์.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3731

Observações e Lições Emergentes do Programa de Milho com Insumos na Época 1998/99 na Província de Nampula, Moçambique.
Provedor de dados: 31
Autores: Howard,   Julie A.; Massingue,   Jaquelino; Jeje,   Jose Jaime; Tschirley,   David L.; Boughton,   Duncan; Serrano,   Alexandre.
Resultados de Pesquisa do Departamento de Análise de Políticas MADR-Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Maize; Farmer associations; Crop Production/Industries; Q18.
Ano: 2000
URL: http://purl.umn.edu/55219

Observações preliminares sôbre a longevidade dos "Seedlings" de feijoeiro - Phaseolus vulgaris : em função das reservas cotiledonares
Provedor de dados: 43
Autores: Accorsi,Walter R.; Santos,Clóvis F. O.; Ferraz,Eduardo C.; Barros,Myrthes A. Adâmoli de; Mitidieri,José.
According previous studies about longevity in maize by ACCORSI e ADÂMOLI DE BARROS, (1961) the authors presents in this paper the results of work on longevity of seedlings of beans. Seeds were separated in three groups according their weight, as followings: small 80-120 mg; medium 130-140 mg and big 150-200 mg. The sowing of the seeds was made in pure sand and the seedlings were distributed in distil. water and in complete solution of Arnon and Hoagland. Each treatment was made in two replications with eight seedlings by treatment. At present time the following conclusions can be related: 1.°) - Eight days after germination, the cotiledones of all the seedlings started to fell down, fourteen days after, all cotiledones had fell down. 2.°) - Fifteen days...
Tipo: Info:eu-repo/semantics/article
Ano: 1964
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761964000100011

Observations and Emerging Lessons from the 1998/99 High-Input Maize Program in Nampula Province, Mozambique
Provedor de dados: 31
Autores: Howard,   Julie A.; Massingue,   Jaquelino; Jeje,   Jose Jaime; Tschirley,   David L.; Boughton,   Duncan; Serrano,   Alexandre.
Research Results from the Department of Policy Analysis MARD-Directorate of Economics
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Maize; Farmer associations; Crop Production/Industries; Q18.
Ano: 2000
URL: http://purl.umn.edu/55218

Observed and estimated leaf appearance of landrace and improved maize cultivars
Provedor de dados: 65
Autores: Langner,Josana Andreia; Streck,Nereu Augusto; Durigon,Angelica; Silva,Stefanía Dalmolin da; Lago,Isabel; Dalmago,Genei Antonio; Reiniger,Lia Rejane Silveira; Scheffel,Lúcio Gabriel; Poersch,Anderson Haas.
ABSTRACT: The objective of this study was to compare the simulations of leaf appearance of landrace and improved maize cultivars using the CSM-CERES-Maize (linear) and the Wang and Engel models (nonlinear). The coefficients of the models were calibrated using a data set of total leaf number collected in the 11/04/2013 sowing date for the landrace varieties ‘Cinquentinha’ and ‘Bico de Ouro’ and the simple hybrid ‘AS 1573PRO’. For the ‘BRS Planalto’ variety, model coefficients were estimated with data from 12/13/2014 sowing date. Evaluation of the models was with independent data sets collected during the growing seasons of 2013/2014 (Experiment 1) and 2014/2015 (Experiment 2) in Santa Maria, RS, Brazil. Total number of leaves for both landrace and improved...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Vegetative development; Air temperature; Sowing time; Model.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000100201

Occurrence of a closely-related isolate to Maize yellow striate virus in wheat plants
Provedor de dados: 114
Autores: Dumón,A.D; Mattio,M.F; Argüello Caro,E.B; Alemandri,V; Puyané,N; del Vas,M; López Lambertini,P; Truol,G.
In Argentina, wheat fields have exhibited virus-like symptoms, such as chlorotic streaking, dwarfing, yellowing and empty ears since 2007. Symptomatic plants and leaves samples were collected in Marcos Juárez (2007) and Río Cuarto (2008 and 2013), both of them in Córdoba province. The virus was experimentally transmitted from symptomatic wheat plants to wheat cv. Baguette 10 and cv. BioINTA 3005 using the vector Delphacodes kuscheli Fennah (Delphacidae); symptoms of chlorotic streaking, dwarfing and yellowing appeared in the inoculated cereals at 10-15 days post-inoculation. Virus presence was confrmed by electron microscopy and RT-PCR using degenerated primers, which amplified a conserved region of the plant rhabdovirus polymerase (L) gene. Sequence...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Cytorhabdovirus; Polymerase gene; Delphacodes kuscheli.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2015000200003

Occurrence of arbuscular mycorrhizal fungi after organic fertilization in maize, cowpea and cotton intercropping systems - doi:  10.4025/actasciagron.v34i2.13143
Provedor de dados: 1
Autores: Sousa, Carla Silva; Universidade Federal do Recôncavo da Bahia; Menezes, Rômulo Simões Cezar; Universidade Federal de Pernambuco; Sampaio, Everardo Valadares Sá Barretto; Universidade Federal de Pernambuco; Oehl, Fritz; Agroscope Reckenholz-Tänikon Research Station; Maia, Leonor Costa; Universidade Federal de Pernambuco; Garrido, Marlon da Silva; Universidade Federal do Vale do São Francisco; Lima, Francisco Sousa; Universidade Federal do Recôncavo da Bahia.
The effect of organic manure on the community of mycorrhizal fungi (AMF) was evaluated in maize, cowpea and cotton intercropping systems in a semi-arid region of Brazil over two consecutive years. The experiment was conducted using a randomized block design with four replicates and six soil treatments: (M) goat manure incorporated in the soil before planting; (G) gliricidia prunings incorporated before planting; (M+G) manure and gliricidia incorporated before planting; (GS) gliricidia applied on the soil surface 45 days after planting; (M+GS) manure incorporated before planting and gliricidia applied to the surface 45 days after planting; and (C) control treatment without incorporation. It was not possible to identify the best treatment for both years in...
Palavras-chave: Agronomia/ Microbiologia Agrícola mycorrhizal association; Gliricidia sepium; Goat manure; Green fertilizer Microbiologia e Bioquímica do Solo.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/13143

Occurrence of Fusarium moniliforme and fumonisins in kernels of maize hybrids in Venezuela
Provedor de dados: 58
Autores: Mazzani,Claudio; Borges,Orángel; Luzón,Odalís; Barrientos,Venancio; Quijada,Pablo.
Fusarium moniliforme (FM) incidence and fumonisins (FUM) content were determined in white kernel samples of maize hybrids, harvested in farms of Guárico and Portuguesa states, Venezuela. FM incidence was estimated in subsamples placed on a malt-salt-agar medium. Values in the range of 0-15 % were considered low, from 15-30% intermediate, and more than 30% high. FUM content was quantified through specific immunoassay (Fumonitest, VICAM Sci. Tech., USA) and values above 1 ppm were considered high. The hybrids were compared using a completely randomized design and results were subjected to analysis of variance and mean comparisons. The correlation between FUM content and FM incidence was also estimated. FM and FUM were detected in all of the 89 samples. Mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fusarium moniliforme; Fumonisins; Venezuelan maize; Hybrids.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000400018

Occurrence of Sclerospora spontanea Weston on Saccharum spontaneum in Thailand
Provedor de dados: 106
Autores: Somkiat Titatarn; Syamananda, Riksh.
1 table
Palavras-chave: Corn; Maize; Wild sugarcane; Saccharum spontaneum; Downy mildew; Sclerospora spontanea; Thailand; ข้าวโพด; โรคราน้ำค้าง; ประเทศไทย.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3874

Occurrence of the parasitoid Anastatus sp. in eggs of Leptoglossus zonatus under the maize in Brazil
Provedor de dados: 65
Autores: Marchiori,Carlos Henrique.
The objective of this study was to report, for the first time in Brazil, the occurrence of the parasitoid Anastatus sp. (Hymenoptera: Eupelmidae) in eggs of Leptoglossus zonatus (Hemiptera: Coreidae) on maize (Zea mays L.) in Itumbiara County, State of Goias, Brazil (18°25'S; 49°13'W). Percent parasitism was 6.9%.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Anastatus; Zea mays; Leptoglossus zonatus; Crop pest; Parasitoid.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782003000400029

Occurrence of weed species in Jatropha curcas intercropping systems
Provedor de dados: 87
Autores: Concenço,G.; Silva,C.J.; Correia,I.V.T.; Silva,J.A.N.; Santos,S.A.; Fróes,A.L.; Fábris,D.N.; Staut,L.A.
This study aimed to evaluate the level of infestation by weed species in a consolidated Jatropha plantation, as a function of the plant species grown in interrows. The experiment was installed in 2006 at the district of Itahum, city of Dourados, state of Mato Grosso do Sul, Brazil, made possible through a partnership between Embrapa Western Agriculture and Paraiso Farm. Treatments consisted of (1) Jatropha in monocrop, with no plant at the interrrows; or the following plants cultivaded at the interrows of Jatropha: (2) Stylosanthes spp.; (3) Brachiaria ruziziensis; (4) Brachiaria ruziziensis + Stylosanthess pp.; (5) Brachiaria humidicola; (6) Panicum maximum cv. massai; (7) Cajanus cajan cv. anão; (8) Crotalaria spectabilis; (9) Crop rotation system 1 -...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha crop; Infestation; Phytosociology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000200010

Ocorrência de doenças causadas por molicutes e por vírus em milho nas Províncias de Tucumán e de Córdoba na Argentina
Provedor de dados: 102
Autores: GIMÉNEZ PECCI,MARIA P.; OLIVEIRA,ELIZABETH DE; RESENDE,RENATO O.; LAGUNA,IRMA G.; CONCI,LUÍS R; AVILA,ANSELMO; HERRERA,PATRÍCIA; GALDEANO,ERNESTINA; VIRLA,EDUARDO; NOME,CLÁUDIA F.
A incidência de doenças causadas por molicutes e por vírus foi avaliada em lavouras de milho (Zea mays) nas Províncias de Tucumán e de Córdoba, na Argentina, em fevereiro de 2000. Na Província de Tucumán verificou-se que 44% das lavouras apresentaram altos níveis de incidência de plantas com sintomas de enfezamentos causados por molicutes (50 a 100%), em altitudes variando de 300 a 2.000 m. A presença de fitoplasma e de espiroplasma foi confirmada em amostras de folhas de plantas com sintomas de enfezamentos, através dos testes de PCR e de "Western blotting". Constatou-se, porém, que a eficiência desses testes para detecção destes patógenos, quando os sintomas apresentados pelas plantas eram muito acentuados, foi da ordem de 70%, e de apenas 30% quando os...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Fitoplasma; Espiroplasma; Mal de Rio Cuarto virus; Maize dwarf mosaic virus; Maize rayado fino virus.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582002000400012

Of What Merit is Improved Inputs use in Uganda's Maize Productivity?
Provedor de dados: 31
Autores: Okoboi,   Geofrey.
This paper used the Uganda National Household Survey (UNHS) dataset of 2005/06 to examine the productivity of improved inputs used by smallholder maize farmers in Uganda. Yield and gross profit functions were estimated with the stochastic frontier model. Results revealed a significant effect improved inputs use on yield but not gross profit. Farmers who used commercial improved seed with fertiliser obtained superior yield but lower gross profit compared to farmers who planted recycled seed (of improved variety) without fertiliser. Furthermore, if the opportunity cost of own land and labour inputs in maize production were imputed, overall, farmers made economic losses. Based on the prevailing farmers’ production technology and market conditions, maize...
Tipo: Journal Article
Palavras-chave: Improved inputs; Productivity; Uganda; Food Security and Poverty; Q12; Q16.
Ano: 2010
URL: http://purl.umn.edu/96649

Ökologische Sanitärlösungen in Afrika: Beitrag zu nachhaltiger Abfallentsor-gung und erhöhter Bodenfruchtbarkeit
Provedor de dados: 21
Autores: Germer, Jörn; Grenz, Jan; Sauerborn, Joachim.
While plant nutrient deficiencies are a major constraint to increasing crop yields in many rural parts of Sub-Saharan Africa, excess nutrients in organic wastes and wastewater cause environmental and hygienic problems in urban areas. We report on an ongoing research aimed at implementing principles of ecological sanitation on a university campus near Accra, Ghana. Alternative sanitation including dry urinals and separating toilets was installed in buildings. Pure urine, urine-water mix, greywater from baths and kitchens and faeces are treated and stored separately. Except for faeces, all materials are used to fertilise annual (urine) and perennial (urine-water, greywater) crops. Urine application significantly boosted maize and sorghum growth. Pathogens...
Tipo: Conference paper, poster, etc.
Palavras-chave: Recycling; Balancing and resource management Composting and manuring.
Ano: 2007
URL: http://orgprints.org/9429/1/9429_Germer_Vortrag.pdf

Old tools as new support for on farm conservation of different types of maize
Provedor de dados: 63
Autores: Vidal,Rafael; Silva,Natália Carolina de Almeida; Ogliari,Juliana Bernardi.
ABSTRACT: A germplasm collection should represent the diversity of the target species and the gene pools associated with it. However, it is critical to establish collection plans which ensure such representativeness. At times it is difficult to identify the best strategy for collecting domesticated species that are conserved in situ/on farm, since, in general, the magnitude of the diversity existing in a geographical area was hitherto unknown. The Diversity Census methodology was developed for previous diagnosis of the diversity of Zea mays subsp. mays L., conserved by farmers in two municipalities in the far western region of the state of Santa Catarina, southern Brazil. The Diversity Census database allowed for the identification of the best strategy to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Genetic diversity; Morphological characters; Use values.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101100

Óleo essencial de Schinus molle L. para o controle de Sitophilus zeamais Most.1855 (Coleoptera:Curculionidae) em milho.
Provedor de dados: 21
Autores: Fernandes, Eires Tosta; Favero, Silvio.
A espécie Sitophilus zeamais é uma das principais pragas do milho armazenado no Brasil. Seu controle é feito por meio do uso de inseticidas sintéticos, o que é prejudicial ao homem e ao ambiente. Por isso, estão sendo desenvolvidas pesquisas em busca de soluções alternativas, produtos menos tóxicos e biodegradáveis. Assim, neste trabalho foi testada a toxicidade de contato, fumigação, repelência e tópica do óleo essencial das folhas de Schinus molle L sobre o gorgulho do milho, S. zeamais. O óleo foi eficaz no controle de S. zeamais dependendo da concentração por meio de três vias de intoxicação: contato, fumigação e repelência, apresentando assim efeito insetistático por meio destas vias. O efeito inseticida foi baixo e obtido apenas por meio da via de...
Tipo: Journal paper
Palavras-chave: Farming Systems Cereals; Pulses and oilseeds.
Ano: 2014
URL: http://orgprints.org/26518/1/Fernandes_%C3%93leo.pdf

On farm fertilizer trials
Provedor de dados: 106
Autores: Boon-Ampol, P.; Meesawat, R.; Theeraporn, S.; Savathanon, M.
Palavras-chave: Corn; Maize; Fertilizers; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบข้าวโพดและข้าวฟ่าง; ไร่นาเกษตรกร; การทดสอบปุ๋ย; การทดสอบพันธุ์ในหลายท้องที่.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4110

On farm research and regional trials in Agricultural Colleges during 1982
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-aroon; Fishcher, K.S.; Pipat Weerathaworn; Aneknan Machauy; Pattama Sirithunya; Ladda Chuchaisangrat.
15 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Farmer's fields; Regional trials; Cultural practices; Planting methods; Weed control; Fertilizers; Fertilizer trials; Tillage systems; Spacing; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; วัชพืช; การทดสอบปุ๋ย; ระบบการไถพรวน; การจัดการ; ระยะปลูก.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4124

On farm research for quality of maize. Populations evaluation for old and new recipes in France
Provedor de dados: 21
Autores: Lebrun, Remy; Chable, Véronique.
Participatory research in South of France aimed to create and exploit diversity on maize. Farmers and researchers have organized an on-farm experiment with traditional and new populations to assess key quality parameters. Population characteristics were evaluated through the different steps of food processes. Chef and cookers have also proposed new recipes to better exploit the diversity.
Tipo: Conference paper, poster, etc.
Palavras-chave: Systems research and participatory research Breeding; Genetics and propagation.
Ano: 2014
URL: http://orgprints.org/24003/7/24003.pdf

On farm research on corn and sorghum 1989
Provedor de dados: 106
Autores: Rachain Thiraporn; Prapon Boonrumpun; Kosol Kirdpoksub; Somchai Potisan.
8 tables
Palavras-chave: Corn; Maize; Sorghum; On farm research; Varietal trial; Commercial hybrid trial; NPK fertilizer trial; Verification trial; ข้าวโพด; ข้าวฟ่าง; การทดสอบระดับไร่กสิกร; ผลผลิต; ลูกผสม; ปุ๋ย; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสฟอรัส; ปุ๋ยโปแตสเซียม.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4361

On farm research on corn and sorghum 1990
Provedor de dados: 106
Autores: Rachain Thiraporn; Somchai Lim-aroon; Prapon Boonrumpun; Kosol Kirdpoksub; Pratuan Klinto; Somsak Rodlong.
8 tables
Palavras-chave: Corn; Maize; Sorghum; On farm research; Varietal trial; Commercial hybrid trial; NPK fertilizer trial; Verification trial; ข้าวโพด; ข้าวฟ่าง; การทดสอบระดับไร่กสิกร; ผลผลิต; ลูกผสม; ปุ๋ย; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสฟอรัส; ปุ๋ยโปแตสเซียม.
Ano: 1990
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4296

On farm testing open discussion
Provedor de dados: 106
Autores: Ampol Senanarong; Welsch, D.E.
4 ill.
Palavras-chave: Corn; Maize; On farm testing; Technology package; Extension package; ข้าวโพด; การทดสอบพันธุ์; ไร่นาเกษตรกร; เทคโนโลยีการผลิต; การส่งเสริม; เทคโนโลยีการผลิตที่เหมาะสม.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3915

On-farm adaptive maize research in Nakhon Sawan province : Research on fertilizer management 1987
Provedor de dados: 106
Autores: Chollawuth La-ied; Withaya Marsangsan; Sompong Ditsantia; Chaleao Ditsantia; Harrington, L.W.
2 ill., 8 tables
Palavras-chave: Corn; Maize; On farm research; Fertilizer management; Production; Yields; ข้าวโพด; ปุ๋ย; ผลผลิต; ไร่นาเกษตรกร.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4253

On-farm research and regional trials at Agricultural College during 1981
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-Aroon; Pipat Weerathaworn; Lilly Wongweerachotkit; Pattama Sirithunya.
22 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Cultural practices; Weed control; Fertilizers; Yields; Quality; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; วัชพืช; สารกำจัดวัชพืช; การทดสอบผลผลิต; การเพาะปลูก.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4048

On-farm research and regional trials for corn and sorghum during 1980
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-Aroon; Pipat Weerathaworn; Lilly Wongweerachotkit.
17 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Planting methods; Cultural practices; Yields; Quality; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; วิธีการปลูก; การเพาะปลูก.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4009

On-farm research for corn and sorghum during 1976
Provedor de dados: 106
Autores: Supot Faungfupong; Mongkol Yolprasarn; Bunpote Tasanasuwan.
13 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Land preparation; Planting methods; Fertilizers; Depth of planting; Herbicides; Weed control; Plant density; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบปุ๋ย; สารกำจัดวัชพืช; ความลึกของการปลูก.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3850

On-farm research for corn and sorghum during 1979
Provedor de dados: 106
Autores: Supot Faungfupong; Somchai Lim-aroon; Wasana Wongyai; Rachain Thiraporn.
12 tables
Palavras-chave: Corn; Maize; Sorghum; Variety trials; Fertilizer trials; Verification trials; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; การทดสอบปุ๋ย; การทดสอบแบบหลายปัจจัยการผลิต.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3971

On-farm research on corn and sorghum 1987
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-Aroon; Prapon Boonrumpun; Kosol Kirdpoksub; Prapot Letsiriworakul; Wantana Chotsriphanporn; Achara Chittaladakorn; Praphaphan Pornpirksanan; Wedderburn, Richard N.
13 tables
Palavras-chave: Corn; Maize; Sorghum; On farm research; Regional trials; Hybrid test; ข้าวโพด; ลูกผสม; ข้าวฟ่าง; การทดลองในระดับไร่กสิกร; ผลผลิต.
Ano: 1987
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4252

On-farm research on corn during 1977
Provedor de dados: 106
Autores: Supot Faungfupong; Mongkol Yolprasarn.
26 tables
Palavras-chave: Corn; Maize; On farm research; Variety trials; Regional trials; Herbicides; Plant population; Fertilizers; Weed control; Seed quality; Plant densities; Yields; ข้าวโพด; การทดสอบพันธุ์; ความหนาแน่นของประชากร; การใส่ปุ๋ย; การควบคุมวัชพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3939

Ontology-driven International Maize Information System (IMIS) for Phenotypic and Genotypic Data Exchange
Provedor de dados: 17
Autores: Rosemary Shrestha; Hector Sanchez; Claudio Ayala; Peter Wenzl; Elizabeth Arnaud.
The Consultative Group on International Agricultural Research (CGIAR; http://www.cgiar.org/) centres have developed the International Crop Information System (ICIS; http://www.icis.cgiar.org) for the management and integration of global information on genetic resources, and germplasm improvement for any crop. The Maize breeding programs at CIMMYT (http://beta.cimmyt.org/) have different software tools to manage phenotypic, genotypic, and environmental information for their experiments generated worldwide. These tools have the capacity of collecting information in the field, wet lab, and store it into different relational databases. The IMIS (http://imis.cimmyt.org/confluence/display/IMIS/Crop+Finder) is an implementation of the ICIS, which is a...
Tipo: Poster
Palavras-chave: Bioinformatics; Plant Biology; Data Standards.
Ano: 2010
URL: http://precedings.nature.com/documents/5029/version/1

Operational guidelines for assessing the impact of agricultural research on livelihoods.  Good practices from CIMMYT
Provedor de dados: 31
Autores: La Rovere,   Roberto; Dixon,   John.
Tipo: Report
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2007
URL: http://purl.umn.edu/56180

Operational parameters of soybean seeding in santa fe system
Provedor de dados: 70
Autores: Chioderoli,Carlos A.; Furlani,Carlos E. A.; Aguiar,Aislan O.; Cavichioli,Fábio A.; Cassia,Marcelo T.
The use of no tillage system associated with the crop-livestock integration is an alternate managing that promotes the accumulation of dry matter in the soil, an essential fact to make the system sustainable and profitable. The aim of this study was to evaluate the operational performance of a planter-tractor set on maize straws intercropped with Urochloa, in different seeding modes. The soybean crop was seed on the intercropping of two forage species (Urochloa brizantha and Urochloa ruziziensis) in five cropping systems: MBL (Maize with Urochloa in the maize seeding row, mixed with base fertilizer and deposited at 0.10 m), MBE (Maize with Urochloa seeded between rows at the same day of seeding maize), MBC (Urochloa between rows of maize seeded with the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No tillage system; Crop-livestock integration; Slip; Operating performance.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000500009

Opportunities and challenges for integrating dairy cattle  into farms with certified organic pineapple production  as perceived by smallholder farmers in Central Uganda
Provedor de dados: 21
Autores: Nalubwama, Sylvia; Kabi, Fred; Vaarst, Mette; Kiggundu, Muhammad; Smolders, Gidi.
A study was conducted in 2013 to assess opportunities and challenges of integrating dairy cattle into organic pineapple production in Uganda. Thirty organic pineapple farmers were interviewed using a semistructured questionnaire. The main dairy cattle management systems were tethering (73%) and zero grazing (27%). Average landholding was 1.74 ± 1.06 and 3.75 ± 2.70 ha for zero grazing and tethering systems, respectively. All farms were diversified with various livestock such as cattle, goats, sheep, pigs, and chickens and crops including pineapples, maize, coffee, bananas, beans, sweet potatoes, and cassava. The level of integration of dairy cattle into pineapple production depended on the distance of crop fields from the livestock enterprises. More farms...
Tipo: Journal paper
Palavras-chave: Dairy cattle; Africa.
Ano: 14
URL: http://orgprints.org/32998/1/Nalubwama_et_al-2018-Organic_Agriculture%20%281%29.pdf

Opportunities for farming in alpine countries – pathways to truly grassland-based beef and milk production in Austria and Switzerland
Provedor de dados: 21
Autores: Frick, Rebekka; Weisshaidinger, Rainer; Moakes, Simon; Müller, Adrian; Bartel, Andreas; Schwank, Othmar; Petrasek, Richard; Biedermann, Roger; Stolze, Matthias.
Farming in the alpine countries of Austria and Switzerland fulfils important economic, socio-cultural and ecological functions for society. At the same time, it is responsible for important environmental impacts, whereas nitrogen balance surpluses and related impacts play a central role. It is crucial to reduce nitrogen inputs and site-adapted production and closing material cycles are core elements of ecologically sustainable land use.  The study analysed the effects of adapted beef and dairy systems on the environmental impact and the food production with the help of the SOL mass-flow model. This includes higher reliance on grassland-based feed by abandoning the use of concentrate feed and forage maize, locally adapted reduction of livestock numbers,...
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle; Beef cattle; Health and welfare.
Ano: 2018
URL: http://orgprints.org/34825/1/frick-etal-2018-SUSALPSConference2018-p25.pdf

Opportunities to Improve Household Food Security Through Promoting Informal Maize Marketing Channels: Experience from Eastern Cape Province, South Africa
Provedor de dados: 31
Autores: Traub,   Lulama Ndibongo; Jayne,   Thomas S.
Maize meal is a staple food in South Africa, particularly among the poor. The South  African government by the mid-1980s enacted a series of legislations aimed at reducing the role  of  government within the market and placing increasing reliance on market forces and the private  sector. Ex post studies of the impact of maize market reform in neighboring countries found that,  in general, the reforms led to lower maize milling/retailing margins in real terms. However, in  the case of South Africa, recent analysis indicates that maize market reform has not reduced  processing and retailing margins in the maize meal supply chain. The study objectives are to  determine actual and potential consumer demand for the types of maize meal capable of being  produced...
Tipo: Report
Palavras-chave: Food security; Food policy; Maize; Marketing; South Africa; Crop Production/Industries; Food Security and Poverty; F14.
Ano: 2006
URL: http://purl.umn.edu/54568

Opportunity costs for maize associated with localised application of sewage sludge derived fertilisers, as indicated by early root and phosphorus uptake responses
Provedor de dados: 21
Autores: Lemming, Camilla; Oberson, Astrid; Hund, Andreas; Jensen, Lars Stoumann; Magid, Jakob.
Background: Phosphorus recycling from waste and localised placement of fertilisers can potentially improve sustainable P management in agriculture. However, knowledge about root and plant P uptake responses to placement of complex waste-derived fertilisers is lacking.   Methods: Sewage sludge (SS) and sewage sludge ash (ASH) were tested against triple superphosphate (TSP) in a rhizobox setup where maize shoot and root growth and architecture were followed for 30 days. The three P sources were either mixed homogenously into the soil (slightly acidic, low in available P and moderate P fixing capacity; labelled with 33P) or localised in a patch close to the seed.  Results: Localisation of TSP and SS both induced increased root length density in and around the...
Tipo: Journal paper
Palavras-chave: Composting and manuring.
Ano: 2016
URL: http://orgprints.org/30548/1/Lemming2016-Opportunity%20costs%20for%20maize%20associated%20with%20localised.pdf

Optimal length of the grass-clover period in  crop rotations: results of a 9-year field  experiment under organic conditions
Provedor de dados: 21
Autores: Boer, H. de; Eekeren, N. van; Pinxterhuis, Ina; Stienezen, M.W.J.
A nine year crop rotation experiment was carried out in the Netherlands from 2002 through 2010 to (1) determine the optimal length of the grass-clover (mixture) and maize period in crop rotations and (2) to determine which crops should receive slurry application with priority in case the availability of cattle slurry is limited.  The results show that dry matter yield decreased for all treatments over the experimental period, due to a decrease in plant-available N (from N fixation by the clover, applied slurry and mineralization of soil N). The relative yield increase (increase relative to the negative trend) due to slurry application was largest when all crops received slurry application, and the effects of slurry application increased over time.
Tipo: Report
Palavras-chave: Pasture and forage crops; Farm nutrient management.
Ano: 2012
URL: http://orgprints.org/26233/1/2702.pdf

Optimal Management of Molds in Stored Corn
Provedor de dados: 31
Autores: Yigezu,   Yigezu A.; Alexander,   Corinne E.; Preckel,   Paul V.
Long term storage of corn is becoming more common due to the recent increase in the demand for corn by ethanol plants. Infection of maize kernels by toxigenic fungi remains a challenging storage problem despite decades of research. Experts in storage management propose the use of a combination of preventive and monitoring-based responsive strategies in response to mold risks. In this paper, a stochastic dynamic programming model is solved to determine the expected profitability and optimal combination, timing and intensity of the proposed mold management strategies using farmers’ existing infrastructure. The results show that even with relatively high monitoring costs, maintaining high quality grain using a monitoring based optimal mold management strategy...
Tipo: Conference Paper or Presentation
Palavras-chave: Mold management; Stored corn; Expected profitability; Integrated pest management; Monitoring; Aeration; Stochastic dynamic programming; Crop Production/Industries; Farm Management.
Ano: 2008
URL: http://purl.umn.edu/6572

Optimal Search in Ex situ Collections of Wheat Genetic Resources
Provedor de dados: 31
Autores: Gollin,   Douglas; Smale,   Melinda; Skovmand,   Bent.
This paper develops a theoretical model for analyzing gene bank management decisions regarding the search for traits of economic value in ex situ collections of wheat. The model is applied to data on the probability of finding useful sources of resistance to Russian wheat aphid (Diuraphis noxia) and septoria tritici leaf blotch, using Monte Carlo simulations for sampling distributions, simulations of varietal diffusion paths, and actual cost data from searches. Three specific questions are posed and answered: (1) what is the optimal size of search among genetic resources of a given type for a trait of economic value? (2) what is the value of specialized knowledge about which genetic resources are most likely to display resistance? and (3) how should search...
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/7695

Optimierung der Proteinversorgung durch Maissilage auf ökologisch wirtschaftenden Milchviehbetrieben im Grünland
Provedor de dados: 21
Autores: Velik, Margit; Steinwidder, Andreas; Baumung, Roswitha; Zollitsch, Werner; Knaus, Wilhelm.
The aim of the present study was to investigate and optimize the protein supply of organic dairy cows kept in Austrian grassland regions through the inclusion of maize silage into the diet. Therefore, two feeding trials were carried out. Trial I examined the effect of a partial substitution of purchased concentrates with home grown maize silage on feed and nutrient intake, milk performance and feed efficiency. Trial II was conducted to investigate the effect of maize silage or grain as an energy supplement to grass-clover silage based diets. In trial I milk yield decreased by 10%, however concentrate intake per kg milk was markedly reduced and dietary N efficiency and energy balance tendencially improved. Trial II revealed that even a small amount of maize...
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2007
URL: http://orgprints.org/9304/1/9304_Velik_Vortrag.pdf

Optimization of drying process of Zea Mays malt to use as alternative source of amylolytics enzymes
Provedor de dados: 52
Autores: Biazus,Joana Paula Menezes; Souza,Anderson Gomes; Santana,José Carlos Curvelo; Souza,Roberto Rodrigues de; Tambougi,Elias Basile.
This work aimed to study the drying process optimization of maize (Zea Mays) malt for obtaining maize malt, without affecting enzymatic activity of alpha e beta-amylases from maize malt. Results showed that dryer operation must occur in zone at 54°C and 5.18-6 h process time. The maize malt obtained had good enzymatic properties.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alpha and beta -amylases enzymes; Maize (Zea mays) malt/drying process; Optimization.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000400023

Optimization of particle bombardment parameters for the genetic transformation of Brazilian maize inbred lines
Provedor de dados: 86
Autores: Petrillo,Caroline Pereira; Carneiro,Newton Portilho; Purcino,Antônio Álvaro Corsetti; Carvalho,Carlos Henrique Siqueira; Alves,José Donizeti; Carneiro,Andréa Almeida.
The objective of this work was to develop a genetic transformation system for tropical maize genotypes via particle bombardment of immature zygotic embryos. Particle bombardment was carried out using a genetic construct with bar and uidA genes under control of CaMV35S promoter. The best conditions to transform maize tropical inbred lines L3 and L1345 were obtained when immature embryos were cultivated, prior to the bombardment, in higher osmolarity during 4 hours and bombarded at an acceleration helium gas pressure of 1,100 psi, two shots per plate, and a microcarrier flying distance of 6.6 cm. Transformation frequencies obtained using these conditions ranged from 0.9 to 2.31%. Integration of foreign genes into the genome of maize plants was confirmed by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Ammonium glufosinate; Beta-glucuronidase; Immature embryos; Phosphinotricin acetyl transferase; Plant transformation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000300012

Optimization of PCR amplification of maize microsatellite loci
Provedor de dados: 74
Autores: Ogliari,Juliana Bernardi; Boscariol,Raquel L.; Camargo,Luis E.A.
Maize (Zea mays L.) microsatellite loci are useful as genetic markers because they are numerous, occur in every chromosome, and have a high content of polymorphism information. Furthermore, they can be amplified by PCR and the resulting fragments resolved on agarose gels. A major problem, however, is that the primers used in their amplification often have different length and nucleic acid content, requiring optimization of PCR amplification programs for each locus. We developed "touchdown" PCR programs successfully used in the amplification of a set of 125-maize microsatellite loci, chosen as representative of all chromosomes. The programs varied both in relation to the annealing temperature (Tm) and primer concentration. Primers could be divided into four...
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000200026

Optimization of some processing conditions for Kokoro production using Response Surface Methodology
Provedor de dados: 111
Autores: Idowu, Atinuke Olamide; Aworh, Charles Ogugua.
Abstract: Deep fat frying of kokoro was investigated with the aim of upgrading the traditional production process by optimizing the processing conditions and improving its nutritional value by incorporation of African yam bean (AYB), an underutilized crop with high nutritional value.  The effect of frying temperature, frying time and quantity of AYB flour on moisture, oil contents and crispness of the kokoro was evaluated by Box Behnken experimental design of Response Surface Methodology.  Optimization was achieved by maximizing crispness and minimizing moisture and oil contents.  Statistical analysis with response regression showed that breaking force, oil and moisture contents were significantly (p&lt;0.05) correlated with frying temperature and time....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food Science; Food processing and preservation; Food   tourism and hospitality management Maize; African yam bean; Response surface methodology; Deep fat frying; Optimum processing condition; Kokoro.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2819

Optimization of the production of mycorrhizal inoculum on substrate with organic fertilizer
Provedor de dados: 58
Autores: Coelho,Ieda R; Pedone-Bonfim,Maria VL; Silva,Fábio SB; Maia,Leonor C.
The system for production of inoculum of arbuscular mycorrhizal fungi (AMF) using sand and vermiculite irrigated with nutrient solution is promising. However, organic amendments added to the substrate can stimulate sporulation of AMF and replace the nutrient solution. The aim of this study was to maximize the production of AMF (Acaulospora longula, Claroideoglomus etunicatum, Dentiscutata heterogama and Gigaspora albida) using selected organic substrates (vermicompost, coir dust and Tropstrato) together with sand and vermiculite. The production of spores varied among the tested AMF and according to the organic source added to the substrate. The vermicompost promoted higher sporulation of A. longula in relation to the other AMF and substrates. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AMF; Biofertilizer; Vermicomposto; Inoculum.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400007

Optimized conditions for maize transformation of drought tolerant and herbicide resistant gene by biolistic bombardment
Provedor de dados: 106
Autores: Niran Juntawong; Panitee Saengmaneetham; Surasit Mangkorn.
4 ill., 1 table
Palavras-chave: Corn; Maize; Drought tolerance; Herbicides; Resistant gene; Biolistic bombardment; Optimized conditions; ข้าวโพด; ข้าวโพดเลี้ยงสัตว์; ข้าวโพดทนแล้ง; พันธุ์ต้านทาน; สารกำจัดวัชพืช; การถ่ายยีน.
Ano: 2004
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4208

Optimizing nitrogen rates in the midwestern United States for maximum ecosystem value
Provedor de dados: 7
Autores: Ewing, Patrick M; University of Minnesota, Department of Agronomy and Plant Genetics ; ewing069@umn.edu; Runck, Bryan C; University of Minnesota, Department of Geography, Environment and Society; runck014@umn.edu.
The importance of corn production to the midwestern United States cannot be overestimated. However, high production requires high nitrogen  fertilization, which carries costs to environmental services such as water quality. Therefore, a trade-off exists between the production of corn yield and water quality. We used the Groundwater Vulnerability Assessment for Shallow depths and Crop Environment Resource Synthesis-Maize models to investigate the nature of this trade-off while testing the Simple Analytic Framework trade-offs featured in this Special Feature. First, we estimated the current levels of yield and water quality production in northeastern Iowa and southern Minnesota at the 1-square-kilometer, county, and regional scales. We then constructed an...
Tipo: Peer-Reviewed Reports
Palavras-chave: Agriculture; Agroecology; Corn belt; DSSAT; Fertilization rate; Frontier analysis; Groundwater nitrate; GWAVA-S; Land use; Nitrogen; Rotation; Row crops; Simple Analytics Framework; Yield.
Ano: 2015

Optimum plant population for maize-bean intercropping system in the Brazilian semi-arid region
Provedor de dados: 63
Autores: Morgado,Luiz Balbino; Willey,Robert William.
Establishment of the ideal number of plant is a crucial point for obtaining maximum profits while cropping different species together. The main objective of the study was to investigate the effect of different plant populations of maize and beans, at two nitrogen levels, on the performance of the component crops. Two maize (20,000 and 40,000 plants ha¹) and three bean (30,000; 60,000 and 90,000 plants ha¹) populations were tested in a randomized complete block design with tree replicates. Grain yields of maize and beans were affected by intercropping and the effect was more detrimental to the legume mainly at the highest maize plant population. The application of nitrogen fertilizer to maize rows mitigated intercropping effect on maize at higher population...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Phaseolus vulgaris; Cropping system; Plant density.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000500005

Optimum rates of nitrogen for early maturing maize
Provedor de dados: 106
Autores: Ring Meesawat; Santi Teeraporn; Chollawuth La-ied; Prasarn Promsoongwong; Pradit Boonampol; Sompong Ditsantia; Mongkol Panichkul.
5 tables
Palavras-chave: Corn; Maize; Nitrogen fertilizers; Early maturity; ข้าวโพด; พันธุ์เบา; ปุ๋ยไนโตรเจน.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4605

Organic cabbage growth using green manure in pre-cultivation and organic top dressing fertilization
Provedor de dados: 75
Autores: Cordeiro,Ana Amélia S; Rodrigues,Marinete B; Gonçalves Júnior,Murilo; Espíndola,José Antônio A; Araújo,Ednaldo da S; Guerra,José Guilherme M.
ABSTRACT The experiment was conducted in (Integrated Agroecological Production System in Seropedica-RJ) Sistema Integrado de Produção Agroecológica (SIPA), Seropédica-RJ, to evaluate the effect of two maize populations in relation to baby corn productivity and shoot mass, to determine the contribution of pre-cultivated maize, green velvet and organic topdressing fertilization in the agronomic performance of cabbage (Brassica oleracea var. capitata). The experimental design consisted of randomized blocks with three treatments (maize population of 100,000 and 200,000 plants ha-1 and green velvet at 100,000 plants ha-1) and eight replicates. After that, cabbage was transplanted in the straw of these species, adopting a randomized block design allocated in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica oleracea var. capitata; Agroecology; Minimum tillage; Baby corn; Corn stigmas; Velvet green.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000400515

ORGANIC CARBON CONTENTS AND STOCKS IN PARTICLE SIZE FRACTIONS OF A TYPIC HAPLUDOX FERTILIZED WITH PIG SLURRY AND SOLUBLE FERTILIZER
Provedor de dados: 90
Autores: Mafra,Maria Sueli Heberle; Cassol,Paulo Cezar; Albuquerque,Jackson Adriano; Grohskopf,Marco André; Andrade,Andreia Patrícia; Rauber,Luiz Paulo; Friederichs,Augusto.
The use of pig slurry (PS) as fertilizer can affect the soil quality and increase total stocks of soil organic carbon (TOC). However, the effects of PS on TOC amount and forms in the soil are not fully understood, particularly in areas under no-tillage (NT). The purpose of this study was to determine TOC contents and stocks in the particulate (POC) and mineral-associated C fractions (MAC) of an Oxisol after nine years of maize-oat rotation under NT, with annual applications of PS, soluble fertilizer and combined fertilization (pig slurry + soluble fertilizer). The experiment was initiated in 2001 in Campos Novos, Santa Catarina, with the following treatments: PS at rates of 0 (without fertilization - PS0); 25 (PS25); 50 (PS50); 100 (PS100); and 200 m3...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Manure; Swine slurry; Carbon fixation; Soil organic matter; No-tillage.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000401161

ORGANIC FARMING INTEGRITY IN MAIZE CULTIVATION IN SPAIN
Provedor de dados: 21
Autores: Bello, Dr A; Porcuna, Dr J. L.; Fabeiro, Dra C.; Gonzálvez, Mr V.
Although now Genetically Modified Organism (GMO) maize varieties (Zea mays L. ) are legal in all EU Member States, Spain was the first European Union (EU) country where this type of varieties were cultivated, since 1998. Currently the Spanish Ministry of Agriculture, Fish and Food (MAPA), estimate ca. 12 % of the total conventional maize area was sown last year 2006 with these varieties. In the last five years 9 organic maize contamination cases have been report by 3 different EU organic certification bodies in Navarra, Aragón and Cataluña. But no actions to search sources of contamination, lessons to develop an improved coexistence regulation, were taken. Organic farmers never received any compensation for their losses. This paper analyse existing...
Tipo: Conference paper, poster, etc.
Palavras-chave: Consumer issues; Technology assessment.
Ano: 2007
URL: http://orgprints.org/12909/1/034%2DBello%2DOrganic_as1.doc

Organic farming provides improved management of plant parasitic nematodes in maize and bean cropping systems
Provedor de dados: 21
Autores: Atandi, Janet G.; Haukeland, Solveig; Kariuki, George M.; Coyne, Danny L.; Karanja, Edward N.; Musyoka, Martha W.; Fiaboe, Komi K.M.; Bautze, David; Adamtey, Noah.
Intensiﬁcation of agriculture, combined with poor agronomic practices have increased the incidence of plant parasitic nematodes (PPN) and other soil pathogens in East Africa, which consequently aﬀects crop productivity in small holder farms. The objective of the study was to assess the eﬀectiveness of farming systems in management of PPN and to recommend the best practice to farmers. Therefore, two ﬁeld trials were established, one infarmer ﬁeldsandoneon-station,usingmaize (Zeamays L.), intercroppedwithbeans(Phaseolusvulgaris L.) and in rotationwith beans as asole crop. Organic farming(that receivedcompost, Tithonia diversifolia and neem cake (Azadirachta indica)) was compared to conventional farming (that received fertilizer and nematicide), farmer...
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Crop health; Quality; Protection Root crops.
Ano: 2017
URL: http://orgprints.org/31976/1/Atandi-etal-2017OrganicFarming-and-nematodesAGEE-Vol247-p265-272.pdf

Organic maize
Provedor de dados: 21
Autores: Dierauer, Hansueli; Anken, Thomas; Hiltbrunner, Jürg; Kessler, Willy; Mayer, Jochen; Strasser, Fredi; Schmutz, Res.
Maize cultivation provides a valuable addition to the feed ration in farms with dairy cows. However, the cultivation of organic maize is challenging and posing risks regarding erosion, leaching of nutrients and soil compaction. Not all sites are suitable for maize cultivation. Therefore, it is important to first study the site before the cultivation.   This leaflet provides some general information on how to cultivate organic maize optimally. Different topics about the needs of maize, the sowing, the right crop rotation and pest management are covered. Finally, there is also some information about economic aspects.  This leaflet was made for farmers that want to begin cultivating organic maize, but it might also be of use to conventional maize farmers. The...
Tipo: Practice tool
Palavras-chave: Root crops.
Ano: 2008
URL: http://orgprints.org/31993/1/1017-mais.pdf

Organic Management Impacts on Micro-environment in Cassava
Provedor de dados: 21
Autores: Anil, T. Anish; Suja, G.; Byju, G.; Veena, S.S.
Alternative soil management practices like organicfarming assume special significance in the context ofglobal climate change for sustainable and safe foodproduction, protection of environment and humanhealth. Organic farming provides a clean environmentby promoting soil quality and sequestering soil organicC. Cassava (Manihot esculenta Crantz) is an importanttropical tuber crop that plays a significant role in thefood and nutritional security. Cassava is the third largestsource of food carbohydrates in the tropics, after riceand maize. It is grown for its starchy roots, which servesas a staple food and also a raw material for starch, sagoand animal feed industries. It has the potential to producemaximum dry matter and has the ability to adapt to awide...
Tipo: Journal paper
Palavras-chave: Root crops.
Ano: 2014
URL: http://orgprints.org/27889/7/27889.pdf

Organic matter addition in organic farming – Impact on root development and yields in maize and cowpea over dry seasons
Provedor de dados: 21
Autores: Sangakkara, Dr Ravi; Bandaranayake, Mr P; Dissanayake, Ms U; Gajanayake, Ms J.
Organic matter and its proper management are vital in tropical organic farming to maintain productivity. A field study thus placed rice straw or Gliricidia leaves on the soil surface or the material was incorporated into soil. The impact of these treatments on soil moisture, root development and yields of organically grown maize or cowpea were evaluated in an Asian dry season. Incorporation increased soil moisture retention in the soil and hence induced better root growth, culminating in higher yields. The impact was greater in maize, especially with Gliricidia leaves. The benefits of incorporating organic matter in dry seasons for tropical organic farming are presented.
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring.
Ano: 2008
URL: http://orgprints.org/12525/1/Sangakkara_12525_ed.doc

ORGANIC NITROGEN IN A TYPIC HAPLUDOX FERTILIZED WITH PIG SLURRY
Provedor de dados: 90
Autores: Grohskopf,Marco André; Cassol,Paulo Cezar; Correa,Juliano Corulli; Mafra,Maria Sueli Heberle; Panisson,Jonas.
The application of pig slurry may have a different effect on nitrogen dynamics in soil compared to mineral fertilization. Thus, the aim of this study was to determine the different forms of organic N in a Latossolo Vermelho distroférrico (Typic Hapludox) and their relationship to N uptake by crops in response to 10 years of annual application of pig slurry and mineral fertilizer. The treatments were application rates of 0, 25, 50, 100, and 200 m3 ha-1 of pig slurry, in addition to mineral fertilizer, organized in a randomized block design with four replications. The N contents were determined in the plant tissue and in the forms of total N and acid hydrolyzed fractions: ammonium-N, hexosamine-N, α-amino-N, amide-N, and unidentified-N. Annual application of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Manure; N availability; N fractionation.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100127

Organic open field cultivation in the Netherlands
Provedor de dados: 21
Autores: Sukkel, Wijnand.
The arable farming and field vegetable cultivation sector is a significant part of the organic agricultural sector in the Netherlands. The sector produces not only vegetables for human consumption, but also organic animal feed such as maize an cereals. To facilitate organic farmers, Wageningen UR and Louis Bolk Institute carry out a variety or research aimed specifically at organic arable farming and field vegetable production.   The report contains sector facts, sector aspirations, current affairs and research projects.
Tipo: Report
Palavras-chave: Vegetables; Research methodology and philosophy; Netherlands.
Ano: 2011
URL: http://orgprints.org/18782/1/Organic_arable_farming_and_field_vegetable_cultivation.pdf

Organic polyculture of passion fruit, pineapple, corn and cassava: the influence of green manure and distance between espaliers
Provedor de dados: 64
Autores: Araújo Neto,Sebastião Elviro de; Campos,Pedro Arruda; Tavella,Leonardo Barreto; Solino,Antônio Jussier da Silva; Silva,Irene Ferro da.
The organic fruit crop should incorporate the principles of sustainable agriculture, with a guarantee of productivity coupled with ecological diversity, using techniques of policultive with regional species. The aim of the study was to evaluate the effect of the green manure crops [Canavalia ensiformis (jack beans), Crotalaria spectabilis (sunn hemp), Pueraria phaseoloides (tropical kudzu), Arachis pintoi (peanut forage) and spontaneous plants] and distance between espaliers on the yields of Passiflora edulis f. flavicarpa (passion fruit), Ananas comosus (pineapple), Zea mays (maize), Manihot esculenta (cassava) and biomass in organic polyculture in the state of Acre, Brazil. The randomized block design experiment comprised plots encompassing the space...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Organic intercropping; Cover crop; Yield; Land-use efficiency.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000300004

Organization and Performance of National Maize Seed Industries: A New Institutionalist Perspective
Provedor de dados: 31
Autores: Morris,   Michael L.; Smale,   Melinda.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies.
Ano: 1997
URL: http://purl.umn.edu/7698

Origin of variability in maize
Provedor de dados: 106
Autores: Dhawan, N.L.; Sprague, E.W.
1 ill.
Palavras-chave: Corn; Maize; Corn origin; Corn variability; Genetic variation; ข้าวโพด; แหล่งกำเนิด; ความแปรปรวนทางพันธุกรรม.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3742

Osmolyte accumulation and antioxidant metabolism during germination of vigorous maize seeds subjected to water deficit
Provedor de dados: 1
Autores: Prazeres, Camila Segalla; Coelho, Cileide Maria Medeiros.
The objective of this work was to evaluate the alterations of antioxidant enzyme reserves and antioxidant enzymes during germination under water deficit in maize hybrids and to associate with seed vigor, determining the mechanisms related to tolerance for this stress. Two three-way maize hybrids were characterized by their vigor at different levels of water deficit induced by polyethylene glycol 6000. Next, the seeds were hydrated at different osmotic potentials (0.0, -0.3, and -0.9 MPa) and removed at different times to assess the levels of the total soluble protein, total soluble sugars, proline, starch, and antioxidant enzymes, such as superoxide dismutase, catalase and ascorbate peroxidase. The analysis of variance, Tukey test at 5% and principal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Vigor; Antioxidant enzymes; Reserve compounds. Zea mays L vigor antioxidant enzymes reserve compounds.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42476

Otimização da adubação nitrogenada para a cultura de milho e do algodão, nos primeiros anos da adoção do plantio direto em latossolo vermelho da região de Dourados, MS.
Provedor de dados: 14
Autores: ALVES, B. J. R.; ZOTARELLI, L.; HECKLER, J. C.; FERNANDES, F. M.; URQUIAGA, S.
bitstream/CNPAB-2010/27974/1/cot056.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Adubação nitrogenada; Maize; Direct sowing; Zero tillage; Nitrogen fertilizer.; Algodão; Latossolo Vermelho; Milho; Plantio Direto; Solo.; Cotton; Soil.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/624796

Outreach program
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-aroon; Kosol Kirdpoksub; Pipat Weerathaworn; Pasit Marayart; Wanchai Wongsa; Aneknan Machauy; Nisa Sitthibus; Wedderburn, Richard N.
10 tables
Palavras-chave: Corn; Maize; Sorghum; Outreach program; Fertilizers; Herbicides; ข้าวโพด; ข้าวฟ่าง; ทดสอบพันธุ์; ไร่นาเกษตรกร; ปุ๋ย; สารกำจัดวัชพืช; ผลผลิต.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4589

Outreach program National Corn and Sorghum Research Center Kasetsart University
Provedor de dados: 106
Autores: Rachain Thiraporn; Supot Faungfupong; Somchai Lim-aroon; Prapon Boonrumpun; Fishcher, K.S.; Pattama Sirithunya; Pipat Weerathaworn; Aneknan Machauy; Ladda Chuchaisangrat; Busaba Vitayaphatarasrikul.
11 tables
Palavras-chave: Corn; Maize; Sorghum; Varietal trials; Hybrid trials; Weed control; Spacing; Fertilizer trials; Tillage experiment; Verification trials; Cultural practices; Yields; National Corn and Sorghum Research Center; Kasetsart University; Outreach program; ข้าวโพด; ข้าวฟ่าง; การทดสอบระดับไร่กสิกร; การทดสอบพันธุ์; พันธุ์ลูกผสม; การควบคุมวัชพืช; ระยะปลูก; การทดสอบปุ๋ย; การไถพรวน; การทดสอบผลผลิต.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4151

Outstanding impact of soil tillage on the abundance of soil hydrolases revealed by a metagenomic approach
Provedor de dados: 58
Autores: Souza,Renata Carolini; Cantão,Maurício Egídio; Nogueira,Marco Antonio; Vasconcelos,Ana Tereza Ribeiro; Hungria,Mariangela.
ABSTRACT The soil represents the main source of novel biocatalysts and biomolecules of industrial relevance. We searched for hydrolases in silico in four shotgun metagenomes (4,079,223 sequences) obtained in a 13-year field trial carried out in southern Brazil, under the no-tillage (NT), or conventional tillage (CT) managements, with crop succession (CS, soybean/wheat), or crop rotation (CR, soybean/maize/wheat/lupine/oat). We identified 42,631 hydrolases belonging to five classes by comparing with the KEGG database, and 44,928 sequences by comparing with the NCBI-NR database. The abundance followed the order: lipases &gt; laccases &gt; cellulases &gt; proteases &gt; amylases &gt; pectinases. Statistically significant differences were attributed to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metagenome; Microbiome; Soil enzymes; Soil management; No-tillage.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000400723

Overall and directed applications of 2, 4-D and its combinations with triclopyr  to control Cyperus rotundus in corn
Provedor de dados: 106
Autores: Ngarmprasith, A.; Suwunnamek, U.
3 tables
Palavras-chave: Corn maize weed Cyperus rotundus herbicides 2; 4-D triclopyr application ข้าวโพด แห้วหมู การควบคุมวัชพืช ทูโฟร์ดี ไตรโคลเพอร์.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4601

Overview of population development for supporting hybrid maize breeding program
Provedor de dados: 106
Autores: Jampatong, S.; Aekatasanawan, C.; Balla, C.; Chulchoho, N; Sangkaeo, K.
7 tables
Palavras-chave: Corn; Maize; Germplasm; Synthetic population; Plant breeding; ข้าวโพด; เชื้อพันธุกรรม; ประชากร; พันธุ์สังเคราะห์.
Ano: 2001
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4158

Overviewing of weed management practices to reduce weed seed bank and to increase maize yield
Provedor de dados: 87
Autores: Maqsood,Qaiser; N. Abbas,Rana; A. Iqbal,Muhammad; A. Serap,Kizil; Iqbal,Asif; Sabagh,Ayman El.
Abstract  Background:  Weeds are unwanted and undesirable plants which deteriorate the quality of agricultural products and interfere with farming activities. Most of the weeds (indigenous and invasive) seeds get preserved in soil horizons as weed seed bank which ensure their survival leading to the spoilage of quantitative and qualitative functioning of agricultural farms.  Objective:  To keep weeds below threshold level, elimination of weeds seed before germination can be a viable and pro-ecological approach. To achieve this objective, weed seeds reserved in the soil which serve as an effective pool to ensure their survival necessitate weed-seed bank management. Thus the ultimate goal was to synthesize and analyze research findings on weed seed bank...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelopathy; Herbicide pollution; Integrated weed management; Weed seed pool; Zea mays L.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100501

Oxidative stress: molecular perception and transduction of signals triggering antioxidant gene defenses
Provedor de dados: 56
Autores: Scandalios,J.G.
Molecular oxygen (O2) is the premier biological electron acceptor that serves vital roles in fundamental cellular functions. However, with the beneficial properties of O2 comes the inadvertent formation of reactive oxygen species (ROS) such as superoxide (O2&lt;FONT FACE=Symbol&gt;·-&lt;/FONT&gt;), hydrogen peroxide, and hydroxyl radical (OH&lt;FONT FACE=Symbol&gt;·&lt;/FONT&gt;). If unabated, ROS pose a serious threat to or cause the death of aerobic cells. To minimize the damaging effects of ROS, aerobic organisms evolved non-enzymatic and enzymatic antioxidant defenses. The latter include catalases, peroxidases, superoxide dismutases, and glutathione S-transferases (GST). Cellular ROS-sensing mechanisms are not well understood, but a number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Catalase; Aging; Telomeres; Gene regulation; Superoxide dismutase; Genomics.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700003

Ozone saturation and decomposition kinetics in porous medium containing different hybrids of maize
Provedor de dados: 91
Autores: Souza,Jefferson V. da S.; Alencar,Ernandes R. de; Junqueira,Ana M. R.; Oliveira,Gustavo P. de.
ABSTRACT The objective of this study was to evaluate ozone saturation and decomposition kinetics in porous medium containing grains of different hybrids of maize. The following hybrids were used: common maize hybrid AG 1051, super sweet maize hybrids Tropical Plus, GSS 42072, GSS 41499 and GSS 41243. 1 kg grain samples with water contents of 13.0% (w.b.) were placed in glass containers with 3.25 L capacity. The grains were ozonized at the concentration of 1.28 mg L-1, at 25 ºC, with gas flow rate of 5.0 L min-1. Saturation time and concentration, half-life time and physical properties such as apparent specific weight, actual specific weight, porosity, sphericity and circularity of each maize hybrid were determined. The experiments were conducted in a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Ozonation; Saturation concentration; Half-life time.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000400286

PACOTES tecnologicos para o milho e feijao, regiao do Alto Paranaiba e Paracatu. Minas Gerais.
Provedor de dados: 14
bitstream/item/196997/1/Pacotes-tecnologicos.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Praticas culturais; Brasil; Maize; Cultural methods; Bean; Feijão; Milho; Phaseolus Vulgaris; Zea Mays; Brazil.
Ano: 1975
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/480763

PACOTES tecnológicos para o milho: Região do Triângulo Mineiro, Minas Gerais.
Provedor de dados: 14
Pacote 1; Pacote 2; Pacote 3.
Tipo: Sistema de Produção (INFOTECA-E)
Palavras-chave: Praticas culturais; Minas Gerais; Brasil; Maize; Cultural methods.; Milho; Zea Mays.; Brazil.
Ano: 1975
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/903219

Panicum schinzii Hack. ingeburgerd in Nederland
Provedor de dados: 16
Autores: Reijerse, Fons (A.I.); Stolwijk, Pieter (P.F.).
Since c. 1995 Panicum schinzii has been found as a weed in maize fields on several localities in the eastern part of the Netherlands. The species may now be considered naturalised in the Netherlands. In this paper, P. schinzii is compared with the more common P. dichotomiflorum and several diagnostic morphological differences between the two species are given. Adaptations for the identification key of the Dutch Panicum species are proposed for ‘Heukels’ Flora van Nederland’.²
Tipo: Article / Letter to the editor
Ano: 2002
URL: http://www.repository.naturalis.nl/record/527944

Parametros cineticos de absorcao de fosforo e caracteristicas morfologicas do sistema radicular de variedades de milho.
Provedor de dados: 14
Autores: MACHADO, C. T. de T.; FURLANI, A. M. C.
bitstream/CPAC-2009/24168/1/p2002_55.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize.; Fósforo; Fisiologia Vegetal; Morfologia Vegetal; Milho; Nutrição Vegetal; Variedade; Zea Mays.; Plant nutrition; Plant physiology; Phosphorus; Plant anatomy; Varieties.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567477

Parámetros genéticos y respuestas a la selección en la población de maíz ZAC. 58 original y en su versión mejorada por selección masal.
Provedor de dados: 32
Autores: Coyac Rodríguez, José Luis.
Para conocer los parámetros genéticos de una población original de maíz (Zea mays L.) y su versión mejorada por selección masal, los cambios producidos en la población por 24 ciclos de selección masal visual estratificada (SMVE), la factibilidad de seguir empleando el mismo método de mejoramiento, y la eficiencia relativa teórica de varios métodos de selección (simples y combinados), se evaluó en cuatro ambientes el rendimiento de grano por planta (RPP) de las variedades de maíz Zac. 58 Original (Z0) y Zac. 58 SM24 (Z24), mediante la combinación de un Diseño de Familias de Medios Hermanos (DFMH) y Familias de Hermanos Completos (FHC). Para formar las familias de este Diseño, cada variedad se sembró en una parcela de 10 surcos de 10 m. Previo a la floración...
Palavras-chave: Zea mays L.; Familias; Mejoramiento genético; Selección masal; Varianza genética; Variedad ZAC. 58; Families; Plant breeding; Mass selection; Genetic variances; ZAC. 58 variety; Maestría; Genética.
Ano: 2011
URL: http://hdl.handle.net/10521/572

Parámetros genéticos y respuestas a la selección en la población de maíz ZAC. 58 original y en su versión mejorada por selección masal.
Provedor de dados: 32
Autores: Coyac Rodríguez, José Luis.
Para conocer los parámetros genéticos de una población original de maíz (Zea mays L.) y su versión mejorada por selección masal, los cambios producidos en la población por 24 ciclos de selección masal visual estratificada (SMVE), la factibilidad de seguir empleando el mismo método de mejoramiento, y la eficiencia relativa teórica de varios métodos de selección (simples y combinados), se evaluó en cuatro ambientes el rendimiento de grano por planta (RPP) de las variedades de maíz Zac. 58 Original (Z0) y Zac. 58 SM24 (Z24), mediante la combinación de un Diseño de Familias de Medios Hermanos (DFMH) y Familias de Hermanos Completos (FHC). Para formar las familias de este Diseño, cada variedad se sembró en una parcela de 10 surcos de 10 m. Previo a la floración...
Palavras-chave: Zea mays L.; Familias; Mejoramiento genético; Selección masal; Varianza genética; Variedad ZAC. 58; Families; Plant breeding; Mass selection; Genetic variances; ZAC. 58 variety; Maestría; Genética.
Ano: 2011
URL: http://hdl.handle.net/10521/572

Parâmetros hídricos, área foliar e coeficiente cultural (kc) do consórcio milho-braquiária irrigado.
Provedor de dados: 14
Autores: SILVA, F. A. M. da; EVANGELISTA, B. A.; MALAQUIAS, J. V.; GUERRA, A. F.; ROCHA, O. C.
bitstream/item/142172/1/bolpd-316.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Braquiária; Crop-livestock integration; Maximum water demand; Maize; Pastage.; Evapotranspiração; Lavoura; Integração; Milho; Pecuária.; Evapotranspiration; Intercropping.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1023831

Parmana prehistoric maize and manioc substance along the Amazon and Orinoco
Provedor de dados: 121
Autores: Anna Curtenius Roosevelt; Roosevelt, Anna Curtenius.
Tipo: Text
Palavras-chave: AGRICULTURA; VENEZUELA; ANTIGUEDAD..
Ano: 1980
URL: http://www.flacso.org.ec/biblio/shared/biblio_view.php?bibid=115661&tab=opac&oai:flacso.org.ec:115661

Partial diallel cross between exotic and adapted maize populations evaluated in acid soil
Provedor de dados: 63
Autores: Morello,Camilo de Lellis; Miranda Filho,José Branco de; Gorgulho,Eliana Patrícia.
In Brazil, acid soils represent a large portion of the agricultural area and the development of cultivars with tolerance to acidity has shown to be feasible. The identification of germoplasm potentially tolerant to acidity was the purpose of this work. Two distinct groups of maize (Zea mays L.) populations were crossed according to the partial diallel mating scheme: Group [1] with six adapted populations and Group [2] with seven exotic varieties. All varieties and crosses were evaluated under the condition of acid and low fertility soil. Traits analyzed were: EY- ear yield, PH- plant height and EH- ear height. Outstanding varieties per se, with yield higher than 3 t ha-1, were SUWAN-2, TAITINGA, TAIÚBA and IUBATÃ in Group [1]; and CUPURICO DMR, TUXPEÑO...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Partial diallel; Heterosis; Acid soil; Aluminum tolerance.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000200014

Partial Factor Productivity, Agronomic Efficiency, and Economic Analyses of Maize in Wheat-Maize Cropping System in Pakistan
Provedor de dados: 31
Autores: Amanullah; Almas,   Lal K.
Getting maximum benefits from cereals do not lie in reducing N-rate and its number of splits but lowering cost per unit cereal production through higher yields. Field experiments were conducted on maize (Zea mays L.) at the New Developmental research Farm of NWFP (Northwest Frontier Province) Agricultural University Peshawar-Pakistan during 2002-03 and 2003-04 in order to investigate effects of variable rates of N and its time of application on the partial factor productivity (PFPN), agronomic efficiency (AEN), net returns (NR), value-cost ratio (VCR) and marginal returns (MR). The 2 x 3 x 6 factorial experiment was designed having two plant densities (D1 = 60,000 and D2 = 100,000 plants ha-1) and three N levels (N1 = 60, N2 = 120 and N3 = 180 kg N ha-1)...
Tipo: Conference Paper or Presentation
Palavras-chave: Maize; Zea mays L.; Planting density; Nitrogen; Agronomic efficiency; Economics; Crop Production/Industries; Farm Management; International Development; Production Economics; Productivity Analysis.
Ano: 2009
URL: http://purl.umn.edu/46747

Partial purification of tightly bound mitochondrial hexokinase from maize (Zea mays L.) root membranes
Provedor de dados: 56
Autores: Rezende,G.L.; Logullo,C.; Meyer,L.; Machado,L.B.; Oliveira-Carvalho,A.L.; Zingali,R.B.; Cifuentes,D.; Galina,A.
In mammals, hexokinase (HK) is strategically located at the outer membrane of mitochondria bound to the porin protein. The mitochondrial HK is a crucial modulator of apoptosis and reactive oxygen species generation. In plants, these properties related to HK are unknown. In order to better understand the physiological role of non-cytosolic hexokinase (NC-HK) in plants, we developed a purification strategy here described. Crude extract of 400 g of maize roots (230 mg protein) contained a specific activity of 0.042 µmol G6P min-1 mg PTN-1. After solubilization with detergent two fractions were obtained by DEAE column chromatography, NC-HK 1 (specific activity = 3.6 µmol G6P min-1 mg PTN-1 and protein recovered = 0.7 mg) and NC-HK 2. A major purification...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrophobic interaction chromatography; Maize; Mitochondrial hexokinase; Non-cytosolic hexokinase; Purification.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000900003

Partial substitution of concentrates by maize silage in rations for organic dairy cows and its influence on performance and utilization efficiency
Provedor de dados: 21
Autores: Velik, Margit; Baumung, Roswitha; Zollitsch, Werner; Knaus, Wilhelm, Friedrich.
The aim of the present study was to investigate the influence of partial substitution of purchased concentrates with maize silage on feed intake, energy and nutrient supply, milk production and feed utilization efficiency in organic dairy cows.  In the experiment, two winter rations were compared. In the experimental group (E) 2/3 of average herd concentrate intake were replaced by maize silage. In group E total dry matter, protein und energy intake was significantly lower than in the control group (C) (16.3 and 17.8 kg, 99 and 110 MJ NEL, 2170 and 2460 g crude protein, respectively). Milk yield decreased in group E by 1.7 kg, which was not statistically significant. Ruminal nitrogen balance and dietary protein to energy ratio was significantly lower in...
Tipo: Conference paper, poster, etc.
Palavras-chave: Feeding and growth.
Ano: 2006
URL: http://orgprints.org/7177/1/Paper_Veliketal.pdf

Participatory Evaluation of Integrated Pest and Soil Fertility Management Options Using Ordered Categorical Data Analysis
Provedor de dados: 31
Autores: Rutto,   Esther; De Groote,   Hugo; Vanlauwe,   Bernard; Kanampiu,   Fred; Odhiambo,   George D.; Khan,   Zeyaur R.
During participatory rural appraisals, farmers at the Lake Victoria basin of Kenya and Uganda identified Striga, stemborer and declining soil fertility as three major constraints to maize production To reduce food insecurity, several innovative integrated technologies to address these constraints have been developed, including push-pull (maize intercropped with Desmodium and surrounded by napier grass), maize-soybean and maize-crotalaria rotations, and Imazapyrresistant (IR) maize seed coated with the herbicide. To let farmers evaluate the new technologies, 12 demonstration trials, comparing the different technologies, were established in four villages in Siaya and Vihiga districts (Western Kenya) and two villages in Busia (Uganda). These evaluations,...
Tipo: Conference Paper or Presentation
Palavras-chave: Farmers' preference; Technologies; Ordinal regression; Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/25317

Participatory Farmer Evaluation of Stem borer Resistant Maize varieties in three maize growing ecologies of Kenya
Provedor de dados: 31
Autores: Ouma,   James Okuro; Odendo,   Martins; Bett,   Charles; De Groote,   Hugo; Mugo,   Stephen; Mutinda,   Charles; Gethi,   James; Njoka,   Stephen; Ajanga,   S.; Shuma,   J.
Insect Resistant Maize for Africa Project (IRMA) aims at developing and deploying insect resistant maize varieties to reduce grain losses due to insect pests. As part of incorporating farmer’s perceptions and improving the adoption of the developed varieties, participatory approaches are adopted. The paper analysis farmer’s preferences of maize germplasm developed through conventional breeding. The paper uses data collected from evaluations conducted at the end of 2006 April and October rains. Nine stem borer resistant maize varieties were evaluated alongside six commercial checks in the moist transitional zones (East and West) at vegetative and harvest stage, while in the dry transitional zone and dry mid altitude zones, 6 new varieties were evaluated...
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/96189

Participatory Plant Breeding for Organic Farming in France, the cauliflower experience at the PAIS
Provedor de dados: 21
Autores: Chable, Dr Véronique; Le Lagadec, François.
The availability of organic seeds is a great problem for organic farmers. The private sector of plant breeding meets difficulties to answer to the organic farming (OF) demand, characterized by small quantities and a great diversity of criteria and by breeding methods which respect the natural species characteristics (see IFOAM Draft Standard on organic seeds and plant breeding). So, the organic sector is organizing breeding and seed production by itself    In France, since 2001, a Brittany regional organic umbrella (IBB, Inter Bio Bretagne), and some researchers from the national institute for agronomical research (INRA) have initiated a breeding program for organic production and a participatory plant breeding (PPB) program for organic cabbages and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Breeding; Genetics and propagation.
Ano: 2005
URL: http://orgprints.org/6634/1/IFOAM%2DCHABLE%2D2005.pdf

PARTICIPATORY RESEARCH METHODS FOR TECHNOLOGY EVALUATION: A MANUAL FOR SCIENTISTS WORKING WITH FARMERS
Provedor de dados: 31
Autores: Bellon,   Mauricio R.
This manual presents methods that enable agricultural scientist and farmers to evaluate technologies/practices jointly. The methods are specifically designed for participatory research on germplasm and soil fertility technologies, and they are illustrated with actual examples from three research projects. The manual begins by reviewing conceptual issues that are important in participatory research and presents information to assist researchers in selecting research sites and fieldwork participants. Next, the manual describes the rationale and associated methods for each major activity in farmer participatory research: diagnosing farmers' conditions, evaluating current and new technologies/practices, and assessing their impact. Goals, procedures,...
Tipo: Book Chapter
Palavras-chave: Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2001
URL: http://purl.umn.edu/23717

Partitioning optimization of proteins from Zea mays malt in ATPS PEG 6000/CaCl2
Provedor de dados: 52
Autores: Ferreira,Graziela Batista; Evangelista,Alex Ferreira; Severo Junior,João Baptista; Souza,Roberto Rodrigues de; Santana,José Carlos Curvelo; Tambourgi,Elias Basile; Jordão,Elizabete.
This work aimed to establish the relationship between the compositions and pH of ATPS PEG 6000/CaCl2 and the proteins partition from maize malt and also to simplify the process optimization in ATPS for a statistical model, established by response surface methodology (RSM). Results showed that these were no influence of pH on the phase diagrams and on the composition of tie line length of PEG 6000/CaCl2 ATPS. SRM analyses showed that elevated pH and larger tie line length were the best conditions for recovering of maize malt proteins. The maximum partition coefficient by PEG 6000/CaCl2 ATPS was about 4.2 and was achieved in ATPS in a single purification step. The theoretical maximum partition coefficient was between 4.1-4.3. The process was very suitable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Partitioning; Optimization; Aqueous two-phase systems; Maize malt; PEG 6000; CaCl2.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300020

Pathogenic and Genetic Diversity among Iranian Isolates of Macrophomina phaseolina
Provedor de dados: 117
Autores: Rayatpanah,Siavosh; Nanagulyan,Siranoush G; Alav,Seyed V; Razavi,Mohammad; Ghanbari-Malidarreh,Abbas.
Charcoal rot, caused by Macrophomina phaseolina (Tassi) Goid., is an economically important disease of oilseed plants in Northern Iran. Seventy isolates of M. phaseolina were obtained from different hosts, including soybean (Glycine max L.), and sunflower (Helianthus annuus L.) in the northern oilseed planting regions of Iran. RAPD-PCR amplification profiles, by using of six random OPA primers (kit A) showed polymorphisms among the isolates. The primer OPA-13 (5'_ CAGCACCCAC_3') amplified the genomic DNA of all isolates of M.phaseolina producing 4-12 bands of sizes between 0.25 and 2.3 kb. Unweighted pair-group method with arithmetic mean (UPGMA) analysis classified the isolates into the nine major groups with 64% similarity. Pathogenicity of isolates was...
Tipo: Journal article
Palavras-chave: Charcoal rot; Oilseed plants; Disease index.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100007

Pathways into and out of Poverty:  A Study of Household Wealth Dynamics in Rural Kenya
Provedor de dados: 31
Autores: Muyanga,   Milu; Jayne,   Thomas S.; Burke,   William J.
For the past half-century, African governments and development agencies have experimented with a series of alternative approaches for addressing rural poverty, each giving way to a new paradigm as the persistence of poverty created disillusionment with prevailing approaches. These broad strategies included ‘growth and trickle down’ in the 1960s; basic human needs and state-led integrated rural development in the 1970s; structural adjustment and economic liberalization in the 1980s and 1990s; and, since 2000, a heterodox mix of donor budget support to empower government ownership in the design of participatory poverty reduction strategies, and resurgent interest in agricultural development. However, rural poverty in most of Sub-Saharan Africa appears to be...
Tipo: Conference Paper or Presentation
Palavras-chave: Poverty; Assets; Shocks; Intergenerational transfers; Kenya; Food Security and Poverty; International Development.
Ano: 2011
URL: http://purl.umn.edu/103377

Pathways out of poverty through cassava, maize and soybean in Thailand
Provedor de dados: 31
Autores: Nareenat,   Roonnaphai.
This phase II covers the case study survey and interviews with farmers growing cassava, soybean and maize in the major producing areas, namely cassava farmers in Nakhonratchasima, soybean farmers in Sukhotai and maize farmers in Nakhonsawan, with the major objectives of studying the returns of diverse farming involving three CGPRT and other crops. Opportunities and constraints for the farm families are analysed together with the related industries and marketing systems in the survey areas. Furthermore, analysis of related institutional support and policy suggestions to promote and expand sustainable diverse farming are also conducted.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Food Security and Poverty.
Ano: 2006
URL: http://purl.umn.edu/32692

Pathways out of poverty through maize and job's tear in Lao People's Democratic Republic
Provedor de dados: 31
Autores: Douangsavanh,   Linkham; Bouahom,   Bounthong.
This working paper provides a more in-depth study focused on specific areas in Luang Prabang and Vientiane provinces as a continuation of the first phase study, which was a review of the history of production, marketing,consumption and policy related to secondary crops and non-secondary crops produced in Lao People's Democratic Republic. As maize and Job's tear are the most important secondary crops in Lao PDR, this study will focus on field investigations regarding the potentials and constraints in farming production, marketing and the processing industry of these crops.
Tipo: Report
Palavras-chave: Food Security and Poverty; International Development.
Ano: 2006
URL: http://purl.umn.edu/32729

Pathways out of poverty through secondary crops and private sector processing as well as institutional arrangements in Viet Nam
Provedor de dados: 31
Autores: Anh,   Dao The; Thinh,   Le Duc; Binh,   Vu Trong; Huan,   Dao Duc.
In Viet Nam, the diversification of CGPRT crops is the main thrust of poverty alleviation in remote and mountainous areas with new opportunities in the market. However, the sustainable development of these commodity chains is in question due to the lack of integrated policy for value chain development and assuring the participation of the poor in the value chains. Two case studies of cassava and maize commodity chains respectively in Yen Bai and Son La provinces suggest ways to encompass these challenges of diversification.
Tipo: Working or Discussion Paper
Palavras-chave: Agribusiness; Crop Production/Industries; Food Security and Poverty.
Ano: 2006
URL: http://purl.umn.edu/7357

Patologia de sementes de milho.
Provedor de dados: 14
Autores: PINTO, N. F. J. de A.
Fungos em sementes; Danos mecanicos e colonizacao fungica; Tratamento fungicida de sementes; Registro no Ministerio da Agricultura.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Patologia; Maize; Seed; Fungicide; Pathology.; Fungicida; Milho; Semente; Zea Mays.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/482099

Pb-phytoextraction by maize in a Pb-EDTA treated Oxisol
Provedor de dados: 63
Autores: Pereira,Bruno Fernando Faria; Abreu,Cleide Aparecida de; Romeiro,Solange; Lagôa,Ana Maria Magalhães Andrade; Paz-González,Antônio.
One of the most viable strategies to restore metal contaminated soils is the introduction of plants specialized in their accumulation or able to tolerate very high metal concentrations. This research evaluated: i. the maize as a Pb-accumulator plant; ii. the effects of EDTA-chelating agent for Pb-uptake by maize; iii. amending effect of EDTA on the soil Pb-availability using different extracts. Treatments consisted of Pb rates (100; 200; 350; 1,200 and 2,400 mg kg-1) applied to a Rhodic Hapludox in the form of Pb3(NO)2 with (0.5 g kg-1) and without EDTA. Lead concentrations were determined in maize plant shoots. Soil available Pb was obtained using DTPA, Mehlich-3 and saturation solutions methods. Ionic speciation in the soil solution was performed using...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mehlich-3; DTPA; Phytoremediation; Available Pb; Ionic speciation.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000100008

Penalização da produtividade da cultura do milho imposta pelo modelo CERES-Maize - DOI: 10.4025/actasciagron.v27i1.2125
Provedor de dados: 1
Autores: Freitas, Paulo Sergio Lourenço de; UEM - Maringá; Mantovani, Everardo Chartuni; UFV; Sediyama, Gilberto Chohaku; UFV; Costa, Luiz Cláudio; UFV.
O presente trabalho foi realizado com o objetivo analisar a penalização imposta pelo modelo CERES-Maize as variáveis de produção da cultura do milho.  Também foram analisadas a evaporação da água do solo e a evapotranspiração da cultura, calculadas pela metodologia utilizada pelo CERES-Maize e pela metodologia utilizada pelo SISDA 3.0, que utiliza o coeficiente de cultura para calcular a evapotranspiração da cultura e o coeficiente de penalização para umidades do solo abaixo da capacidade de campo. Com o objetivo de comparar os dados simulados com os experimentais, foi instalado, em campo, um experimento com a cultura do milho, com os seguintes tratamentos: cinco lâminas de água e dois coeficientes de uniformidade de aplicação de água. A partir dos...
Palavras-chave: 5.03.00.00-8    Engenharia Agrícola CERES-Maize; Evapotranspiração; Evaporação; Irrigação; Lâmina de água 5.03.00.00-8    Engenharia Agrícola.
Ano: 2005
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2125

Perdas de grãos na cultura do milho: pré-colheita, colheita, transporte e armazenamento.
Provedor de dados: 14
Autores: SANTOS, J. P. dos; MANTOVANI, E. C.
Perdas na pre-colheita; Perdas na colheita; Perdas na pos-colheita; Principais pragas dos graos armazenados; Conseguencias do ataque de insetos; Formas de armazenamento e recomendacoes.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Graos; Maize; Grain.; Armazenamento; Milho; Zea Mays.; Storage.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478847

Perdas na colheita de graos no Distrito Federal.
Provedor de dados: 14
Autores: AVIANI, D. de M.; FRANZ, C. A. B.; FOLLE, S. M.; RUBENTAL, I.
bitstream/item/99487/1/comtec-10.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Distrito Federal; Brasil; Crop lasses; Grain; Losses; Maize; Perdas durante a colheita; Soybean.; Arroz; Colheita; Cerrado; Glycine Max; Grão; Milho; Oryza Sativa; Perda; Soja; Zea Mays.; Brazil; Grain crops; Harvesting; Rice.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546376

Performance, carcass characteristics and ingestive behavior of steers fed with silages of different maize hybrids
Provedor de dados: 45
Autores: Horst,E.H.; Mareze,J.; Bumbieris Junior,V.H.; Neumann,M.; Venancio,B.J.; Souza,A.M.
ABSTRACT The objective of this study was to evaluate the performance, carcass characteristics and ingestive behavior of feedlot steers fed with three maize hybrids: Maximus VIP3, Defender VIP and Feroz VIP. The experiment lasted 112 days, weighing animals four times, every 28 days. The experimental diets were formulated and constituted by maize silage and pelletized ration in a 50:50 ratio (dry basis). Regardless of the hybrid used, there was an increase in the intake of dry matter with the advance in feedlot evaluation period (9.15, 9.14, 9.35 and 9.59kg day-1, in the first, second, third and fourth weighing, respectively). The type of maize hybrid silage influenced weight gain of animals differently, with a final mean of 1.413kg for animals fed with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bromatology; Feedlot stages; Noncarcass components; Weight gain; Zea mays L.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000601977

Performance evaluation and optimization of the maize shelling operation of the multi-purpose farm vehicle
Provedor de dados: 111
Autores: Kabenge, Isa; Nsubuga, Denis; Zziwa, Ahamada; Kiggundu, Nicholas; Wanyama, Joshua; Banadda, Noble.
Small-scale farmers register high postharvest losses partly due to failure to carry out primary processing operations. Most of the maize shellers on the Ugandan market lead to high percentage of broken maize grains thus raising the risk of aflatoxin infection during storage. In this study, the operation of an existing maize sheller on the market with a shelling speed of 870 rpm for maize at 13 % moisture content was tested. The main objective of this study therefore was twofold; (i) to develop and evaluate a maize sheller and (ii) to optimize the multi-purpose vehicle shelling operation. The improved maize sheller was designed, fabricated, evaluated and optimized using a factorial experiment with shelling speed and moisture content as the main effects at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize Shelling; Multipurpose vehicle; Physical properties; Engineering properties.
Ano: 2020
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5873

Performance of Crop Insurance Scheme in Udaipur District of Rajasthan
Provedor de dados: 31
Autores: Rathore,   Vikram Singh; Burark,   S.S.; Jain,   H.K.
farms in Salumber tehsil of Udaipur district during 2008-09. The study has revealed that farm income per family is higher on beneficiary farms as compared to non-beneficiary farms. The progress of crop insurance scheme in Rajasthan has been found positive, as is evidenced through compound and linear growth rates. In the Udaipur district, the progress of crop insurance scheme has been found positive, except the claim passed to the number of farmers and amount of sum insured. At the overall level, the total area insured under the crop insurance programme has been only about 45 per cent of the total cropped area of the beneficiary farms. Use of inputs such as human and bullock labour, seed, manures, fertilizers, pesticides, etc. has been found significantly...
Tipo: Journal Article
Palavras-chave: Crop insurance; Insurance premium; Compensation; Agricultural and Food Policy; Q15; Q18; Q19.
Ano: 2011
URL: http://purl.umn.edu/109411

Performance of finishing beef cattle fed different diets containing whole-crop maize silage or sugarcane silage
Provedor de dados: 96
Autores: Roman,Juliano; Jobim,Clóves Cabreira; Resende,Flávio Dutra de; Siqueira,Gustavo Rezende; Faria,Marcelo Henrique de; Oliveira Neto,Renato Alves de.
The objective of the present study was to evaluate the performance of beef cattle in feedlots fed diets containing either whole-crop maize silage or sugarcane silage, and with different formulations. Five diets were evaluated: MSF - diet containing whole-crop maize silage, with fixed formulation during feedlot period; MSV- diet containing whole-crop maize silage, with variable formulation according to feedlot phase; SCSF - diet containing sugarcane silage with fixed formulation; SCSV- diet containing sugarcane silage, with variable formulation; SCSV/MSV- SCSV diet in initial half of fedlot and MSV diet in final half of feedlot period, respectively. It was used a complete random experimental design, with five treatments and three replicates (pens). It was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Average daily gain; Dressing percentage; Hot carcass weight; Intake.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000300029

Performance of layers on sorghum-based poultry feed rations
Provedor de dados: 30
Autores: Reddy, A.R.,( A. Rajasekher Reddy ).
Palavras-chave: Sorghum; Eggs; Body weight; Egg products; Feed consumption; Cereals; Grain; Layering; Maize; Wet season.
Ano: 2005
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3253

Performance of maize landrace under no-till as affected by the organic and mineral fertilizers
Provedor de dados: 52
Autores: Caires,Eduardo Fávero; Joris,Helio Antonio Wood; Churka,Susana; Zardo Filho,Renato.
The aim of this work was to study the effects of organic and mineral fertilizers at sowing (without fertilizers, organic poultry litter fertilizer on the surface and mineral NK + reactive natural phosphate from Arad and NK + triple superphosphate in the furrow) and topdressing (without fertilizers, organic poultry litter fertilization and urea) on chemical attributes of a no-till Oxisol and nutrition and yield of maize landrace (Zea mays L.), Carioca variety in a field experiment. Results revealed that P content (Mehlich 1 and resin) was increased in the soil surface layer with organic poultry litter fertilizer on the surface at sowing. Mineral fertilizer in the sowing furrow could be replaced by organic fertilizer with poultry litter on the surface, but...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Reactive natural phosphate; Nitrogen fertilization; Poultry litter.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200006

Performance of maize seedlings for baby corn production
Provedor de dados: 75
Autores: Costa,Ariane C; Coelho,Fábio C; Garcia,Romário V; Lima,Wallace Luís de; Vivas,Marcelo; Prins,Cláudia L; Rocha,Jaídson G da.
ABSTRACT Using maize seedlings for baby corn production can benefit farmers who have small areas under cultivation. The objective of this study was to evaluate the possibility of using maize seedlings for the production of baby corn. The experiment was carried out in field with four treatments (direct sowing in field; transplanting seedlings 10 days after sowing (DAS); 20 DAS and 30 DAS) in randomized blocks with eight replications. Plants from seedlings 30 DAS were higher than sowing direct in field. Direct sowing in field and seedlings 30 DAS resulted in the largest stands. Sowing direct in field and transplanting seedlings at 20 and 10 DAS presented the highest number of total and commercial ears, while crops obtained from direct sowing in field yielded...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Phenology; Seedling production.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000400421

Performance of maize single-crosses developed from populations improved by a modified reciprocal recurrent selection
Provedor de dados: 63
Autores: Souza Jr.,Cláudio Lopes de; Barrios,Sanzio Carvalho Lima; Moro,Gustavo Vitti.
Maize (Zea mays L.) elite inbred lines developed from pedigree programs tend to be genetically related. Therefore, it is necessary to incorporate unrelated inbreds to those programs to allow the continued release of outstanding single-crosses. The objectives of this research were to compare the usefulness of a modified reciprocal recurrent selection procedure (MRRS) to improve populations to be used as sources of elite inbreds and outstanding single-crosses to integrate pedigree programs, and to investigate the effects of selection on the relative contribution of general (GCA) and specific combining (SCA) abilities to the single-crosses variation. Eight and six S3 lines from populations IG-3-C1 and IG-4-C1, respectively, selected from the first cycle of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diallel design; Maize improvement; Combining ability.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000200011

Performance of some exotic maize germ plasms with particular reference to their susceptibility to Chilo zonellus Swinhoe
Provedor de dados: 106
Autores: Chatterji, S.M.; Sarup, Prakash; Panwar, V.P.S.; Siddiqui, K.H.; Marwaha, K.K.; Bhamburkar, M.W.; Young, W.R.
1 table
Palavras-chave: Corn; Maize; Exotic maize germplasms; Chilo zonellus; Susceptibility; ข้าวโพด; เชื้อพันธุกรรม; พันธุ์ต่างประเทศ.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3908

Performance of supplementary irrigation systems for corn silage in the sub-humid areas
Provedor de dados: 111
Autores: Harby M. S. Mostafa; Lecturer of Agricultural Eng.; Asaad Derbala; Assoc. Prof. of Agric. Engi.
In the humid and sub-humid areas, agricultural production is largely rain fed and this needs to be urgently supplemented by irrigation practice if the country is to meet its food demand.  A two years study was carried out at the experimental site of the Institute of Agricultural Technology and Biosystems Engineering, Johan Heinrich von Thünen Institute (vTI), Braunschweig, Germany to compare performance of maize crop for silage production using three different irrigation systems; rain fed, drip and rain-gun sprinkler.  Growth parameters such as plant height, stem diameter were measured.  The total yields of silage were obtained for all treatments at the harvesting.  The experimental results reveal that total yields obtained from different treatments were...
Palavras-chave: Silage; Performance; Drip; Rain-gun; Rain-fed irrigation; Water use efficiency.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2572

Performance of supplementary irrigation systems for corn silage in the sub-humid areas
Provedor de dados: 111
Autores: Mostafa, Harby M. S.; Derbala, Asaad.
In the humid and sub-humid areas, agricultural production is largely rain fed and this needs to be urgently supplemented by irrigation practice if the country is to meet its food demand.  A two years study was carried out at the experimental site of the Institute of Agricultural Technology and Biosystems Engineering, Johan Heinrich von Thünen Institute (vTI), Braunschweig, Germany to compare performance of maize crop for silage production using three different irrigation systems; rain fed, drip and rain-gun sprinkler.  Growth parameters such as plant height, stem diameter were measured.  The total yields of silage were obtained for all treatments at the harvesting.  The experimental results reveal that total yields obtained from different treatments were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Silage; Performance; Drip; Rain-gun; Rain-fed irrigation; Water use efficiency.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2572

Performance of testers with different genetic structure for evaluation of maize inbred lines
Provedor de dados: 65
Autores: Guimarães,Lauro José Moreira; Miranda,Glauco Vieira; DeLima,Rodrigo Oliveira; Maia,Ciro; Oliveira,Lucimar Rodrigues de; Souza,Leandro Vagno de.
The objective of this study was to evaluate four maize testers for identification of superior inbreed lines in testcross. The four testers evaluated are cultivars with narrow or wide genetic base (single-cross hybrids and open pollinated varieties) and two kernel types (flint or dent). SynD and SynF testers are open pollinated varieties with dent and flint kernels, respectively, and FSH and DSH testers are single-cross hybrids with flint and dent kernels, respectively. SynD tester showed the biggest genetic variance among the maize inbreed lines in crosses. The effects of general combining ability (GCA) for lines and specific combining ability (SCA) for lines x testers were significant, whereas GCA effects for testers were not significant. SynD and SynF...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Diallel; Testcross; Combining ability.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012000500002

Performance of the SunScan canopy analysis system in estimating leaf area index of maize
Provedor de dados: 111
Autores: Philip Gbenro Oguntunde; The Federal University of Technology, Akure; olawale J. Olukunle; The Federal University of Technology, Akure; Johnson T. Fasinmirin; The Federal University of Technology, Akure; Oluremi A. Abiolu; The Federal University of Technology, Akure.
Rapid and reliable estimates of leaf area index (LAI) are important for studies of exchanges of energy and gases in the biosphere-atmosphere continuum.  This paper evaluates the field performance of SunScan canopy analysis system for rapid estimation of LAI.  Direct and indirect measurements of LAI were made in a maize (Zea mays L.) field at four phenological stages (emergence, vegetative, flowering and physiological maturity) at a tropical site in Ghana during the Glowa Vota Project field campaign (www.glowa-volta.de).  Similar measurements were repeated in early and late planting seasons with similar crop management practices.  The result showed a generally good performance of this sensor at all the phenological stages.  Average LAI from the sensor...
Palavras-chave: Agricultural and Biosystems Engineering SunScan probe; Field evaluation; Leaf area index; Maize; Ghana.
Ano: 2012
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1823

Performance und Ertragsbildung von Winterweizen im DOK-Versuch
Provedor de dados: 21
Autores: Mayer, Jochen; Mäder, Paul; Gunst, Lucie.
Wheat yield performance and bread baking quality was investigated in the DOK long term experiment in Switzerland. Yield and crude protein differed between biological and conventional systems but not between bio-organic and bio-dynamic systems. The same observations were made for yield components and baking quality parameters. Potatoes as preceding crops compared to maize performed much better than increased manure application in biological systems.
Tipo: Conference paper, poster, etc.
Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2013
URL: http://orgprints.org/21564/1/21564_Mayer.pdf

Perspectives d’évolution des marches céréaliers pour la campagne de commercialisation 2005/06
Provedor de dados: 31
Autores: Diarra,   Salifou Bakary; Dembele,   Niama Nango.
The 2005 – 2006 marketing campaign was difficult because of the drought that occurred in all countries in the region. As a result, the price of sorghum, millet, maize and rice soared. State actions to improve cereals supply through tax-exempt rice imports did not achieve the expected outcomes. Rice has been the main contributing factor to the rise of cereals price. The low levels of stocks of rice in the world and the supply in fertilizers below expectations along with a decrease in productivity have contributed to the rise of rice prices at the national level.
Tipo: Working or Discussion Paper
Palavras-chave: Cereal market; Outlook; Mali; Food security; Agricultural and Food Policy; Food Security and Poverty; Q11.
Ano: 2006
URL: http://purl.umn.edu/57068

Perspectives d’évolution des marches céréaliers pour la campagne de commercialisation 2005/06
Provedor de dados: 31
Autores: Diarra,   Salifou Bakary; Dembele,   Niama Nango.
The 2005 – 2006 marketing campaign was difficult because of the drought that occurred in all countries in the region. As a result, the price of sorghum, millet, maize and rice soared. State actions to improve cereals supply through tax-exempt rice imports did not achieve the expected outcomes. Rice has been the main contributing factor to the rise of cereals price. The low levels of stocks of rice in the world and the supply in fertilizers below expectations along with a decrease in productivity have contributed to the rise of rice prices at the national level.
Tipo: Working or Discussion Paper
Palavras-chave: Cereal markets; Food security; Mali; West Africa; Prices; Agricultural and Food Policy; Consumer/Household Economics; Food Security and Poverty; Q11; Q12; Q13.
Ano: 2006
URL: http://purl.umn.edu/57142

Perspectives d'évolution des marchés céréaliers pour la campagne de commercialisation 2005/2006
Provedor de dados: 31
Autores: Diarra,   Salifou Bakary; Dembele,   Niama Nango.
Observatoire Du Marche Agricole; Presidence De La Republique; Republique Du Mali Un Peuple Un But Une Foi; Commissariat A La Securite Alimentaire; Comite Technique De Coordination Des Politiques De Securite Alimentaire; Secretariat Technique
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Food policy; Mali; Crop Production/Industries; Q18.
Ano: 2006
URL: http://purl.umn.edu/55814

Perspectives on Agricultural Marketing in 2008: Voices from the Rural Areas
Provedor de dados: 31
Autores: SIMA,   Technical Team.
Research Results from the Agricultural Market Information System (SIMA) of the Department of Statistics, and the Department of Policy MINAG – Directorate of Economics
Tipo: Report
Palavras-chave: Food security; Food policy Mozambique; Marketing; Marketing; Q18.
Ano: 2008
URL: http://purl.umn.edu/55258

Pesquisa agropecuária em Paragominas, PA - 1984.
Provedor de dados: 14
Autores: VEIGA, J. B. da; SERRÃO, E. A. de S.; MARQUES, L. C. T.; CAMARÃO, A. P.; PEREIRA NETO, L. G.; SEIXAS, L. C. G. de S.; CALDERON, M.; COVRE, J. L.
bitstream/item/57544/1/CPATU-ComTec55.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Agropecuária; Avaliação; Consorciação; Quicuio-da-amazônia; Paragominas; Pará; Brasil; Forage crop; Valuation; Grass; Production; Pasture; Maize; Conservation; Fertilizer; Spittleburgs.; Adubação; Arroz; Conservação; Cigarrinha; Gramínea; Milho; Pastagem; Planta Forrageira; Produção; Zea Mays.; Andropogon; Amazonia; Agriculture; Intercropping; Rice.
Ano: 1985
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382312

Pesquisa: alimentação exige maior esforco.
Provedor de dados: 14
Autores: EMBRAPA. Unidade de Execução de Pesquisa de Âmbito Estadual de Dourados (MS).
bitstream/item/73586/1/FOL-5658.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Bean; Maize; Production.; Cerrado; Feijão; Phaseolus Vulgaris; Milho; Pesquisa; Produção; Triticum Aestivum; Trigo; Zea Mays.; Brazil; Research; Wheat.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/234689

Pesquisa em irrigação no trópico Semi-Árido: solo, água, planta.
Provedor de dados: 14
Autores: EMBRAPA. Centro de Pesquisa Agropecuária do Trópico Semi-Árido.
Caracteristicas fisico hidricas de tres latossolos irrigados do Projeto Bebedouro. Evapotranspiracao de feijao-de-corda. Metodologia para determinar as necessidades de agua das culturas irrigadas. Efeito da lamina de irrigacao e da adubacao nitrogenada na producao de graos de milho. Efeito do regime de irrigacao e da adubacao nitrogenada na producao de graos de milheto. Influencia do teor de umidade no solo e da adubacao nitrogenada no rendimento de graos de feijao.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Região árida; Relação; Característica hídrica; Plant; Fertilization; Cowpea; Maize; Millet.; Irrigação; Água; Adubação; Feijão de Corda; Evapotranspiração; Milheto; Pennisetum Typhoides; Milho; Pesquisa; Planta; Vigna Unguiculata; Solo; Zea Mays.; Evapotranspiration; Irrigation; Soil; Water.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131950

Pests and diseases in a changing climate a major challenge for Finnish crop production
Provedor de dados: 21
Autores: Hakala, Kaija; Hannukkala, Asko; Huusela-Veistola, Erja; Jalli, Marja; Peltonen-Sainio, Pirjo.
A longer growing season and higher accumulated effective temperature sum (ETS) will improve crop production potential in Finland. The production potential of new or at present underutilised crops (e.g. maize (Zea mays L.), oilseed rape (Brassica napus L.), lucerne (Medicago sativa L.)) will improve and it will be possible to grow more productive varieties of the currently grown crops (spring wheat (Triticum aestivum L.), barley (Hordeum vulgare L.), oats (Avena sativa L.)). Also cultivation of autumn sown crops could increase if winters become milder and shorter, promoting overwintering success. Climatic conditions may on the other hand become restrictive in many ways. For example, early season droughts could intensify because of higher temperatures and...
Tipo: Journal paper
Palavras-chave: Crop health; Quality; Protection.
Ano: 2011
URL: http://orgprints.org/19438/1/HAKALA.pdf

pGVG: a new Gateway-compatible vector for transformation of sugarcane and other monocot crops
Provedor de dados: 74
Autores: Guidelli,Giovanna V.; Mattiello,Lucia; Gallinari,Rafael H.; Lucca,Paulo Cezar de; Menossi,Marcelo.
Abstract The successful development of genetically engineered monocots using Agrobacterium-mediated transformation has created an increasing demand for compatible vectors. We have developed a new expression vector, pGVG, for efficient transformation and expression of different constructs for gene overexpression and silencing in sugarcane. The pCAMBIA2300 binary vector was modified by adding Gateway recombination sites for fast gene transfer between vectors and the maize polyubiquitin promoter Ubi-1 (ZmUbi1), which is known to drive high gene expression levels in monocots. Transformation efficiency using the pGVG vector reached up to 14 transgenic events per gram of transformed callus. Transgenic plants expressing the β-glucuronidase (GUS) reporter gene...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Monocots; Sugarcane; Vector; Gateway technology; Genetic transformation.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572018000300450

Phenological Sensitivity of Two Maize Cultivars to Trinexapac-Ethyl
Provedor de dados: 87
Autores: MENDES FAGHERAZZI,M.; SOUZA,C.A.; STEFEN,D.L.V.; ZANESCO,P.R.; JUNKES,G.V.; COELHO,C.M.M.; SANGOI,L.
ABSTRACT: In Brazilian agriculture there are few reports on trinexapac-ethyl (TE) effects on maize plant lodging management. This study aimed to evaluate the effects of sequential application of TE sprayed on different plant growth stages of maize using the simple hybrid P30F53HR and the variety SCS 154 Fortuna. Experiments were carried out in a greenhouse in the 2013 and 2014 harvests. Plants were grown singly in 5L pots filled with 75% soil and 25% substrate. The experimental design was a randomized complete block with four replications. The following treatments were performed: (T1) control (no application of growth retardant); (T2) application at V2 (100 g a.i. ha-1); (T3) sequential application of 100 g a.i. ha-1 at V2 plus V3; (T4) sequential...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Growth regulator; Morphological characteristics.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100203

Phenotypic, additive genetic and environment correlations of maize landraces populations in family farm systems
Provedor de dados: 63
Autores: Barros,Luciane Bertoletti; Moreira,Rosângela Maria Pinto; Ferreira,Josué Maldonado.
Knowledge of the association between characters is very important in the genetic breeding programs, but there is limited information about correlations between traits in maize landraces in the current literature. The objectives of this study were to estimate phenotypic, additive genetic and environment correlations among traits in maize landraces, which were cultivated in family farm systems, in order to guide the participatory breeding on maize landraces. Between 294 and 400 half-sib progenies from the six populations were evaluated, subdivided in triple 7X7 and 10X10 lattice design, respectively, with single row plots of 4 m long and spaced 1.00 × 0.20 m. Estimates of correlation coefficients are reported for nine traits: grain yield (GY), relation grain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Population; Recurrent selection; Participatory breeding.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000600010

Phenotypic recurrent selection to improve protein quality in non-opaque maize populations
Provedor de dados: 63
Autores: Garcia,Antonio Augusto Franco; Souza Jr.,Cláudio Lopes de.
Maize (Zea mays L.) protein is considered to be of low quality due to low levels of the essential lysine and tryptophan amino acids. An alternative to solve this problem is to use the opaque-2 gene, which improves the level of these amino acids, but has negative pleiotropic effects on agronomic characters. A phenotypic recurrent selection scheme was carried out in two non-opaque maize populations to verify the possibility of improving their protein quality without using this gene. Four cycles were completed and a 20% selection intensity for tryptophan content in the kernels was used in two populations, IG-1 and IG-2. The original and the four-cycle populations were evaluated in three locations for agronomic traits. For protein and tryptophan content, a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tryptophan; Correlated response; Maize breeding.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400018

Phosphor-Bodenbilanzen von Grünland- und Ackerflächen auf einem ökologischen Milchviehbetrieb
Provedor de dados: 21
Autores: Ohm, Magdalena; Schüler, Maximilian; Paulsen, Hans Marten.
Mineral phosphorus (P) fertilizers from fossil reserves are finite which puts agriculture at risk of losing soil fertility. This study calculates P soil balances of an organic dairy farm in Northern Germany to focus on potentials and variations in the farm P cycle. P flows were different between the years because yield levels and amount of manure application varied. Different plant species showed different P export which depended mainly on biomass export. This can also be seen as their site specific mobilization potential. The highest mean P export between 2010 and 2012 was measured with maize (mean 30.4, range 17.7-38.2 kg P ha-1 a-1) and grass-clover (mean 23.7, range 17.3-29.5 kg P ha-1 a-1). By grazing, permanent grassland showed a mean P mobilization...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farm nutrient management.
Ano: 2015
URL: http://orgprints.org/27197/1/27197_ohm.pdf

Phosphordünger aus Klärschlamm: Evaluierung von Pyrolysekohle und Alkalipyrolyse
Provedor de dados: 21
Autores: Bünemann-König, Else; Symanczik, Sarah; Koller, Martin; Menold, J.; Oelmann, Y.; Stemann, J.
Phosphorus (P) in sewage sludge holds the main proportion of P currently lost in waste streams, and options to recycle it for agriculture are needed. Pyrolysis is a promising local alternative to centralized sewage sludge incineration. Pathogens and organic pollutants are destroyed and a carbon-rich substrate known as biochar is formed. We evaluated pyrolysis of sewage sludge as well as sintering of pyrolysis char with alkali salts. The products were applied in a pot experiment with calcareous and acidic soils to determine P uptake by ryegrass (Lolium multiflorum) and changes in soil  pH, available P and cation exchange capacity. Two products were also tested in a field experiment with maize (Zea mays) on a neutral soil. Cadmium and mercury were partly...
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality Composting and manuring Recycling; Balancing and resource management Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31900/1/Phosphord%C3%BCnger%20aus%20Kl%C3%A4rschlamm.pdf

Phosphordüngewirkung karbonisierter Biogasgärreste
Provedor de dados: 21
Autores: Leong, KI; Lohr, D.; von Tucher, Sabine; Meinken, E.
P-recycling from biogas residue may play a future key role for sustainable P supply in organic farming. However, in particular transportation costs of residue need to be  reduced e.g. by pretreatment. One approach is carbonization by pyrolysis or hydrothermal carbonization (HTC). In a pot trial with maize on a P-deficient, acidic sandy loam P uptake after application of two chars from pyrolysis (400 and 700 °C) and HTC (6 and 8 h dwell time) all made of the same residue was compared to P uptake after application of the raw residue and water soluble KH2PO4 respectively. P  uptake was the same for KH2PO4, raw residue and both HTC treatments, but was significant lower in treatments with pyrolytic chars. Neither dwell time nor temperature  had an effect....
Tipo: Conference paper, poster, etc.
Palavras-chave: Soil quality; Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/31557/1/Phosphord%C3%BCngewirkung%20karbonisierter%20Biogasg%C3%A4rreste.pdf

Phosphorus acquisition and internal utilization efficiency in tropical maize genotypes
Provedor de dados: 86
Autores: Parentoni,Sidney Netto; Souza Júnior,Claudio Lopes de.
The objective of this work was to determine the relative importance of phosphorus acquisition efficiency (PAE - plant P uptake per soil available P), and phosphorus internal utilization efficiency (PUTIL - grain yield per P uptake) in the P use efficiency (PUE - grain yield per soil available P), on 28 tropical maize genotypes evaluated at three low P and two high P environments. PAE was almost two times more important than PUTIL to explain the variability observed in PUE, at low P environments, and three times more important at high P environments. These results indicate that maize breeding programs, to increase PUE in these environments, should use selection index with higher weights for PAE than for PUTIL. The correlation between these two traits showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Mineral nutrition; Phosphorus acquisition; Phosphorus use efficiency; Plant breeding; Quotient of utilization.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2008000700014

Phosphorus availability as a function of its time of contact with different soils
Provedor de dados: 91
Autores: Santos,Hemmannuella C.; Oliveira,Fábio H. T. de; Souza,Adailson P. de; Salcedo,Ignácio H.; Silva,Valério D. M.
ABSTRACT Phosphorus (P) availability is related to soil sorption capacity and is relevant to planning P fertilization and evaluating its residual effect. The aim of this work was to evaluate the P availability to maize plants after different incubation times of six soils from Paraíba state. For this, four doses of P (0, 100, 200 and 300 mg dm-3) were applied in samples of six soils for 0, 30, 60, 90, 180, 240 and 360 days. After the incubation time, the soil samples received fertilization with macro and micronutrients and were cultivated with maize for 35 days, when they were harvested and analyzed to verify dry matter and P content in soil. The increase in the time of contact of P with the soil decreased P availability to plants; however, the formation of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Residual effect; Phosphate; Tropical soils.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001100996

Phosphorus bioavailability of sewage sludge-based recycled fertilizers
Provedor de dados: 21
Autores: Wollmann, Iris; Gauro, Ajay; Müller, Torsten; Möller, Kurt.
Six phosphorus (P) fertilizers recycled from sewage sludge [Struvite SSL, Struvite AirPrex,P-RoC, Mephrec, Pyrolysis coal and Ash (Mg-SSA)] were tested for their plant availability in potted soil of pH 7.2 under greenhouse conditions. The crop sequence simulated a rotation of red clover (Trifolium pratense L.), maize (Zea maize L.), and ryegrass (Lolium perenne L.). Other P fertilizer treatments included: Phosphate Rock (PR), Calcium dihydrogen phosphate [Ca(H2PO4)2], and an unfertilized control. Additionally, soil was regularly inoculated with two strains of plant growth-promoting rhizobacteria (PGPR; Pseudomonas sp. Proradix, and Bacillus amyloliquefaciens) to test their ability to increase P availability to plants. Sequential P  fractionation was...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2018
URL: http://orgprints.org/32921/1/Wollmann2017-Phosphorus%20bioavailability%20of%20sewage%20sludge-based%20recycled%20fertilizers.pdf

Phosphorus cycling within soil aggregate fractions of a highly weathered tropical soil: A conceptual model
Provedor de dados: 21
Autores: Garland, Gina; Bünemann, E. K.; Oberson, A.; Frossard, E.; Snapp, S.; Chikowo, R.; Six, J.
Effective use of soil phosphorus (P) for crop production requires an understanding of how P pools are stabilized and cycled within soil aggregates, rather than assuming that P dynamics, particularly organic P, closely follow those of C. The main goal of this study was to compare C and N cycling with P dynamics in soil aggregate fractions under two distinct crop species, maize (Zea mays) and pigeon pea (Cajanus cajan) in a highly-weathered Lixisol. We found that while C and N follow an open cycle, whereby C and N are mineralized from microaggregates during macroaggregate turnover and partially exit the soil system as gas and leachate, P has a relatively closed cycle, where most of the mineralized and solubilized P from microaggregates is lost from the...
Tipo: Journal paper
Palavras-chave: Soil.
Ano: 2018
URL: http://orgprints.org/34709/1/garland-etal-2018-SoilBiolBiochem-Vol116-p91-98.pdf

Phosphorus distribution and availability in untreated and mechanically separated biogas digestates
Provedor de dados: 63
Autores: Bachmann,Silvia; Uptmoor,Ralf; Eichler-Löbermann,Bettina.
ABSTRACT Biogas digestates contain valuable nutrients but also have high water contents. Di-gestates were sampled from two different biogas facilities before and after solid-liquid separation and were analyzed with regard to their composition and phosphorus (P) fractions. Additionally, to investigate the P fertilizer effects of these digestates in comparison with undigested slurry or TripleSuper-P (TSP), they were applied in a pot experiment (6 kg soil per pot) in an amount corresponding to 200 mg P per pot in combination with various crops (amaranth, maize, maize + beans mixed cropping, sorghum). A separation of digestates resulted in higher P concentrations of the solid fraction in comparison with the liquid fraction. The proportion of the readily...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phosphorus fractions; Anaerobic digestion; Amaranth; Mixed cropping; Soil enzymes.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000100009

Phosphorus losses in runoff after application of litter from broilers fed high-available phosphorus corn feed
Provedor de dados: 18
Autores: Tarkalson, D.D.; Mikkelsen, R.L.
Recent efforts to reduce phosphorus (P) content of corn grain fed to poultry  have led to the development of low-phytic-acid corn. Research is needed to evaluate  the environmental impact of the application to cropland of manure from animals fed  low-phytic-acid corn. The purpose of this research was to determine P losses in  runoff from a bare Piedmont soil (cecil clay loam; clayey, kaolinitic, thermic, Typic  Kanhapludult) in the southeastern United States receiving surface applications of  broiler litter from birds fed a low-phytic-acid corn (HAP broiler litter). The HAP  litter was applied at rates of 0, 8, 16, 33, 49, 66, and 82 kg P ha-1  . Simulated  rainfall was applied at a rate of 7.6 cm hr-1 on the same day the litter sources were  applied to...
Tipo: Article
Palavras-chave: Corn / maize; Nutrients; Corn; Chemistry; Mass Import - autoclassified (may be erroneous).
Ano: 2007
URL: http://eprints.nwisrl.ars.usda.gov/64/1/1229.pdf

Phosphorus Removal by Silage Corn in Southern Idaho
Provedor de dados: 18
Autores: Moore, Amber; Hines, Steve; Brown, B.; de Haro Marti, Mario; Falen, Christi; Chahine, Mireille; Fife, Tianna; Norell, Rick; Ippolito, J.A.
Corn silage is the predominant crop in Idaho used for   recovering phosphorus (P) that has accumulated in soils   from dairy manure applications. However, little is known   about how much P and other nutrients are being recov-  ered under Idaho conditions. The objective of the study   is to estimate P removal by irrigated corn silage crops   cultivated throughout southern Idaho with variable soil   test P concentrations, and to identify effects of increasing soil test P on tissue concentrations of P and on plant  P uptake.        Forty-two different corn silage fields in 2008 and   2009 were selected throughout southern Idaho for soil   and whole plant sampling at harvest. Soils were ana-  lyzed for Olsen P, plant tissue was measured for total P  content,...
Tipo: Technical Bulletin
Palavras-chave: Corn / maize.
Ano: 2010
URL: http://eprints.nwisrl.ars.usda.gov/1364/1/1341.pdf

Phosphorus utilization in broilers fed with diets supplemented with different feed ingredients
Provedor de dados: 63
Autores: Dias,Raquel Souza; López,Secundino; Borgatti,Laura Maria Oliveira; Kebreab,Ermias; Vitti,Dorinha Miriam Silber Schmidt; Abdalla,Adibe Luiz; Appuhamy,Jayasooriya Arachchige Don Ranga Niroshan; France,James.
ABSTRACT: A reliable determination of endogenous phosphorus (P) excretion is required to measure P utilization in chickens accurately. The objective of this study was to investigate phosphorus (P) retention in broilers fed diets formulated with different feed ingredients. Sixty-four 15-d old broiler chicks were fed diets in which part of the dietary P was provided from dicalcium phosphate, maize, barley or soybean. Level of supplementation of each ingredient was calculated to provide two levels of total P (4.5 or 5.0 g kg−1 feed). Birds received a single injection of 3 MBq of 32P to determine endogenous P excretion using the isotope dilution technique. Four days after injection, blood and excreta were collected for analysis of inorganic and radioactive P....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chicken; Endogenous; Isotope dilution; Phosphorus retention.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100018

Photosynthesis Under Field Conditions. IX. Vertical Distribution of Photosynthesis Within a Corn Crop
Provedor de dados: 18
Autores: Wright, J.L.; Lemon, E.R.
Tipo: Article
Palavras-chave: Corn / maize; Mass Import - autoclassified (may be erroneous).
Ano: 1966
URL: http://eprints.nwisrl.ars.usda.gov/482/1/60.pdf

Photosynthesis Under Field Conditions. VIII. Analysis of Windspeed Fluctuation Data to Evaluate Turbulent Exchange Within a Corn Crop
Provedor de dados: 18
Autores: Wright, J.L.; Lemon, E.R.
Tipo: Article
Palavras-chave: Corn / maize; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1966
URL: http://eprints.nwisrl.ars.usda.gov/477/1/59.pdf

Photosynthesis Under Field Conditions. XA. Assessing Sources and Sinks of Carbon Dioxide in a Corn (Zea mays L.) Crop Using Momentum Balance Approach
Provedor de dados: 18
Autores: Lemon, E.R.; Wright, J.L.
Tipo: Article
Palavras-chave: Corn / maize; Research methodology; Mass Import - autoclassified (may be erroneous).
Ano: 1969
URL: http://eprints.nwisrl.ars.usda.gov/188/1/171.pdf

Photosynthesis Under Field Conditions. XB. Origins of Short-Time CO2 Fluctuations in a Cornfield
Provedor de dados: 18
Autores: Lemon, E.R.; Wright, J.L.; Drake, George M.
Tipo: Article
Palavras-chave: Corn / maize; Mass Import - autoclassified (may be erroneous).
Ano: 1969
URL: http://eprints.nwisrl.ars.usda.gov/189/1/172.pdf

PHYSICAL AND CULTURAL WEED CONTROL IN MINOR CROPS
Provedor de dados: 21
Autores: Melander, Bo; Barberi, Paolo.
This paper summarises the major European achievements with physical and cultural weed control methods in minor row crops. Minor crops, such as vegetables, sweet maize and potatoes, present two different situations for physical weed control of entirely different difficulty. Inter-row weeds are easily removed by inter-row cultivation while intra-row weeds, i.e. those growing between the crop plants in the rows, still constitute a major challenge aimed at minimising laborious hand weeding. Investigations have focussed on optimising the use of mechanical principles against intra-row weeds, e.g. harrowing, brush weeding and finger weeding. These methods have been successful in some transplants, potatoes and maize, and may become alternatives to chemical...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2004
URL: http://orgprints.org/4603/1/4603.pdf

PHYSICAL AND CULTURAL WEED CONTROL – STATUS AND FUTURE DIRECTIONS
Provedor de dados: 21
Autores: Melander, Bo.
Non-chemical methods for weed control play an important role for the management of weeds in organic cropping systems in Europe.  With the expansion of the organic area in recent years, more research has been conducted to develop new methods and improve management strategies. Currently, weed harrows, rotary cultivators and inter-row cultivators are the principal methods used for full-width treatments in large agricultural crops, such as cereals, oil seed rape, maize and pulses. The mechanical methods are often combined with cultural measures, e.g. stale seedbeds, delayed sowing, placement of fertilizers etc., to benefit from the additive and sometimes even synergistic effects of combining direct and cultural methods.  In row crops, such as sugar beets and...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2014
URL: http://orgprints.org/28863/7/28863.pdf

Physical properties and organic carbon content of a Rhodic Kandiudox fertilized with pig slurry and poultry litter
Provedor de dados: 90
Autores: Rauber,Luiz Paulo; Piccolla,Cristiano Dela; Andrade,Andréia Patrícia; Friederichs,Augusto; Mafra,Álvaro Luiz; Corrêa,Juliano Corulli; Albuquerque,Jackson Adriano.
The impact of pig slurry and poultry litter fertilization on soils depends on the conditions of use and the amounts applied. This study evaluated the effect of organic fertilizers after different application periods in different areas on the physical properties and organic carbon contents of a Rhodic Kandiudox, in Concordia, Santa Catarina, in Southern Brazil. The treatments consisted of different land uses and periods of pig and poultry litter fertilization: silage maize (M7 years), silage maize (M20 years), annual ryegrass pasture (P3 years), annual ryegrass pasture (P15 years), perennial pasture (PP20 years), yerba mate tea (Mt20 years), native forest (NF), and native pasture without manure application (P0). The 0-5, 5-10 and 10-20 cm soil layers were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofertilizer; Soil quality; Soil structure.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400026

Physical properties of a humic cambisol under tillage and cropping systems after twelve years
Provedor de dados: 90
Autores: Andrade,Andréia Patrícia; Mafra,Álvaro Luiz; Baldo,Gizele Rejane; Piccolla,Cristiano Dela; Bertol,Ildegardis; Albuquerque,Jackson Adriano.
Soil is the basis underlying the food production chain and it is fundamental to improve and conserve its productive capacity. Imbalanced exploitation can degrade agricultural areas physical, chemical and biologically. The objective of this study was to evaluate some soil physical properties and their relation with organic carbon contents of a Humic Dystrudept under conventional tillage (CT) and no-tillage (NT), for 12 years in rotation (r) and succession (s) cropping systems. The experiment was carried out in Lages, SC (latitude 27 º 49 ' S and longitude 50 º 20 ' W, 937 m asl), using crop sequences of bean-fallow-maize-fallow-soybean in conventional tillage rotation; maize-fallow in conventional tillage succession; bean-oat-maize-turnip-soybean-vetch in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop rotation; Crop succession; No-tillage; Soil management.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000100022

Physical quality of a yellow latossol under integrated crop-livestock system
Provedor de dados: 90
Autores: Araújo,Fernando Silva; Salviano,Adeodato Ari Cavalcante; Leite,Luiz Fernando Carvalho; Souza,Zigomar Menezes de; Sousa,Allan Charlles Mendes de.
Soil physical quality is essential to global sustainability of agroecosystems, once it is related to processes that are essential to agricultural crop development. This study aimed to evaluate physical attributes of a Yellow Latossol under different management systems in the savanna area in the state of Piaui. This study was developed in Uruçuí southwest of the state of Piauí. Three systems of soil management were studied: an area under conventional tillage (CT) with disk plowi and heavy harrow and soybean crop; an area under no-tillage with soybean-maize rotation and millet as cover crop (NT + M); two areas under Integrated Crop-Livestock System, with five-month pasture grazing and soybean cultivation and then continuous pasture grazing (ICL + S and ICL +...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: No-tillage system; Soil compaction; Animal trampling; Pasture grazing.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300013

Physical quality of an Oxisol cultivated with maize submited to cover crops in the pre-cropping period
Provedor de dados: 90
Autores: Pereira,Fabiana de Souza; Andrioli,Itamar; Beutler,Amauri Nelson; Almeida,Cinara Xavier de; Pereira,Faber de Souza.
The intensive use of land alters the distribution of the pore size which imparts consequences on the soil physical quality. The Least Limiting Water Range (LLWR) allows for the visualization of the effects of management systems upon either the improvement or the degradation of the soil physical quality. The objective of this study was to evaluate the physical quality of a Red Latosol (Oxisol) submited to cover crops in the period prior to the maize crop in a no-tillage and conventional tillage system, using porosity, soil bulk density and the LLWR as attributes. The treatments were: conventional tillage (CT) and a no-tillage system with the following cover crops: sunn hemp (Crotalaria juncea L.) (NS), pearl millet (Pennisetum americanum (L.) Leeke) (NP)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Management systems; Physical attributes; Least limiting water range.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000100021

Physical-chemical characteristics and fatty acids composition in dairy goat milk in response to roughage diet
Provedor de dados: 52
Autores: Torii,Marcelo Shizuo; Damasceno,Júlio César; Ribeiro,Luciano da Rocha; Sakaguti,Eduardo Shiguero; Santos,Geraldo Tadeu dos; Matsushita,Makoto; Fukumoto,Nelson Massaru.
The objective of the present work was to evaluate the physical-chemical characteristics (density, pH, acidity, fat, protein, lactose and total of solids contents) and milk fatty acids composition (C: 4 to C: 20) in response to roughage sources (alfalfa hay T1; oat hay T2 and maize silage T3). Nine Saanen lactating goats were used, in a triple Youden square design (3 animals x 2 periods). There was no treatment effects in the physical-chemical variables in the univariate analyses; by multivariate analyses three distinct patterns of fatty acids could be defined: milk with greater quantity of short chain fatty acids and acids C17:1omega7 e C18:2omega6 (T1); milk with equivalent amounts of short, medium and long chain fatty acids (T2); and milk with greater...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alfafa hay; Maize silage; Milk quality; Milk composition; Oat hay; Saanen.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000600010

Physical-chemical characterization and wet milling yield of four maize hybrids
Provedor de dados: 70
Autores: Mussolini,Renata C.; Lopes Filho,José F.; Duarte,Aildson P.
The influence of physical-chemical characteristics of maize grains and lactic acid concentrations on byproduct yields, generated by conventional wet milling, was studied during steeping, for four maize hybrids and two lactic acid concentrations (0.55 and 1.00%). For physical-chemical characterization, grain dimensions (length, thickness, and width) were determined, as well as mass of 100 grains, percentage of floating grains, volumetric mass, and centesimal composition. Statistical differences were found for percentage of floating grains (2.33 to 24.67%), volumetric mass (0.814 to 0.850 kg.L-1), mass of 100 grains (0.033 to 0.037 kg), water content (11.86 to 12.20%), proteins (8.21 to 9.06%), lipids (3.00 to 4.77%), and ashes (1.07 to 1.26%). There were no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Physical-chemical properties; Starch recovery; Steeping.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000300015

Physicochemical and sensory characterization of gluten-free fresh pasta with addition of passion fruit peel flour
Provedor de dados: 65
Autores: Ribeiro,Taís Helena Santos; Bolanho,Beatriz Cervejeira; Montanuci,Flávia Daiana; Ruiz,Suelen Pereira.
ABSTRACT:  The aim of this study was to develop a gluten-free fresh pasta formulation with addition of yellow passion fruit peel flour (PPF). A control formulation containing a mixture of rice flour and corn flour and formulations with 10 and 20% of PPF addition were produced. Sensory analysis, physicochemical characterization and technological properties were assessed. The PPF addition to gluten-free pasta increased cooking time, soluble solids loss and water absorption; it also modified the color of the formulations. The control formulation and the formulation containing 10% PPF had the best sensory parameters, leading to an acceptability index over 70%. The 10% PPF addition increased fiber (3.25%) and ashes (2.15%) content and also lowered percentage of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize flour; Rice flour; Byproduct; Passiflora edulis.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001200753

Physicochemical, Thermal, Structural and Pasting Properties of Unconventional Starches from Ginger (Zingiber officinale) and White Yam (Dioscorea sp.)
Provedor de dados: 52
Autores: Oliveira,Cristina Soltovski de; Bisinella,Radla Zabian Bassetto; Bet,Camila Delinski; Beninca,Cleoci; Demiate,Ivo Mottin; Schnitzler,Egon.
Abstract Ginger and white yam starches were investigated and compared with maize starch. Proximal composition, thermogravimetry, differential scanning calorimetry, microscopy, colourimetry, X-ray powder diffractometry and pasting profile were analysed. The unconventional starches presented higher protein and ash contents than the maize starch, that had the highest thermal stability. Higher gelatinisation temperatures were reported for ginger starch, and the enthalpy of the unconventional starches were similar. The maize starch presented the lowest gelatinisation values. For the corn starch the granules were polygonal and smaller than the unconventional starches, and oval shapes and larger diameters were found for the ginger and yam starches. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Native starch; Gelatinization; Thermal analysis; Pasting profile.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100516

Physiological analysis and gene expression analysis of ZmDBP3, ZmALDH9, ZmAN13, and ZmDREB2A in maize lines
Provedor de dados: 1
Autores: Marques, Thaís Lima; Pinho, Renzo Garcia Von; Pinho, Édila Vilela de Resende Von; Paniago, Bruno da Costa; Freitas, Natália Chagas; Santos, Heloisa Oliveira dos.
The objective of this study was to evaluate gene expression related to water deficit tolerance in maize lines. For this, lines previously classified as tolerant (91-T and 32-T) and non-tolerant (24-NT and 57-NT) to water deficit were used. The seeds of the four lines were evaluated for emergence and emergence speed index, and the seedlings were evaluated for root and shoot length under two conditions of water availability (70 and 10% substrate water retention capacity). In transcript analysis, the expression of several genes associated with water deficit tolerance, ZmDBP3, ZmALDH9, ZmAN13, and ZmDREB2A, was evaluated by qRT-PCR for the 91-T and 57-NT lines. It can be concluded that soil water deficiency did not reduce root development. However, the shoot...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic stress; Zea mays; QRT-PCR.; Water deficit; Genética Vegetal.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/43479

PHYSIOLOGICAL AND SANITARY QUALITIES OF MAIZE LANDRACE SEEDS STORED UNDER TWO CONDITIONS
Provedor de dados: 64
Autores: Stefanello,Raquel; Muniz,Marlove Fátima Brião; Nunes,Ubirajara Russi; Dutra,Cláudia Braga; Somavilla,Iana.
The preservation of seed quality during the storage period depends not only on the conditions during production and harvesting but also on the storage and maintenance of appropriate storage product conditions. Thus, the aim of this study was to evaluate the physiological and sanitary qualities of maize landrace seeds stored under two conditions. The maize seed batch varieties Oito carreiras, Cabo roxo and Lombo baio were used. Tests included germination, first count, cold test, accelerated aging and sanity. Based on the results it was concluded that the physiological quality of these seed varieties decreased with the storage period. The major fungi identified in the maize seeds during storage were from the genera Aspergillus, Fusarium and Penicillium,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Storage; Sanity; Germination.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542015000400339

Physiological and sanitary quality of maize seeds preconditioned in ozonated water
Provedor de dados: 91
Autores: Maximiano,Christian V.; Carmona,Ricardo; Souza,Nara O. S.; Alencar,Ernandes R. de; Blum,Luiz E. B.
ABSTRACT The technique of controlled hydration of seeds has been used as a method of physiological conditioning to improve their performance in the field. Solution aeration with ozone gas is a promising option in controlling phytopathogens. The objective of the present study was to evaluate the physiological and sanitary quality of maize seeds preconditioned in ozonated water. In the evaluation of the physiological and sanitary quality, maize seeds were submitted to four concentrations of ozone gas (0, 10, 20 and 30 mg L-1) for five soaking periods (0, 30, 60, 90 and 120 min), with four replicates. Preconditioning maize seeds in ozonated water, followed by natural drying, resulted in a more pronounced initial development of seedlings, measured by means of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Ozonation; Health; Conditioning.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000500360

Physiological aspects of grain yield of maize
Provedor de dados: 106
Autores: Tanaka, A.
11 ill.
Palavras-chave: Corn; Maize; Grain yield; Yields; Corn physiology; ข้าวโพด; ผลผลิตเมล็ด; สรีรวิทยา.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3886

Physiological limits and the role of plant type and varietal adaptation
Provedor de dados: 106
Autores: Palmer, A.F.E.
Palavras-chave: Corn; Maize; Physiology; Plant type; Adaptation; ข้าวโพด; สรีรวิทยา; การปรับตัว.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3914

Physiological processes to understand genotype × environment interactions in maize silking dynamics
Provedor de dados: 26
Autores: Borrás, L.; Westgate, M.E.; Astini, J.P.
Variation in maize yield across environments often reflects genotype-specific responses in crop-flowering dynamics. The most widely observed effect is the temporal separation of male (anthesis) and female (silking) floral maturity, referred to as the anthesis–silking interval (ASI). Many studies have shown that maize yield also is a function of crop growth rate around flowering. At present, however, the relationship between growth rate and flowering dynamics is not fully understood. In this chapter, we present a conceptual basis and experimental approach for quantifying and analysing maize female flowering responses to variation in plant growth. We show how this approach can be applied to resolve contrasting genotypic behaviour under a range of...
Tipo: Conference proceedings
Ano: 2007
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/1299

Physiological quality and amylase enzyme expression in maize seeds
Provedor de dados: 64
Autores: Oliveira,Gustavo Evangelista; Pinho,Renzo Garcia Von; Andrade,Thaís de; Pinho,Édila Vilela de Resende Von; Santos,Custódio Donizete dos; Veiga,Adriano Delly.
The physiological quality of maize seeds is affected by the genotype. Thus, the study of expression of genes associated with this characteristic is important in the genotype selection process in breeding programs. The aim of this research was to study the expression of amylase enzymes associated with physiological quality of maize seeds with different genotypes and seed sizes. We further sought to assess the expression of these enzymes in dry and soaked seeds The experiment was conducted in the experimental area and the Central Seed Laboratory of the Department of Agriculture of the Universidade Federal de Lavras. Seeds of four maize inbred lines were used, classified in two sizes. The physiological quality of the seeds was evaluated by means of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea Mays; Seed quality; QRT-PCR.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000100005

Physiological Response of Maize and Weeds in Coexistence
Provedor de dados: 87
Autores: BARROS,R.E.; FARIA,R.M.; TUFFI SANTOS,L.D.; AZEVEDO,A.M.; GOVERNICI,J.L.
ABSTRACT This study aimed at evaluating the physiology of maize and weeds when living under different densities. The randomized block design with 4 replications was used. The factorial scheme 5 x 2 + 1 and 5 x 3 was adopted, for maize and weeds respectively, corresponding to weed species (Bidens pilosa, Commelina benghalensis, Urochloa brizantha, Sorghum arundinaceum and Ipomoea triloba) and infestation density (control, 15 and 30 plants m-2). Weeds were kept in coexistence with the maize hybrid DKB 390 PRO 2, with an additional treatment for maize plants absent of competition. It was kept in coexistence with maize hybrid DKB 390 PRO 2 besides an additional treatment with maize plants absent of competition. On day 45 and 60 after maize planting (DAP)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Urochloa brizantha; Sorghum arundinaceum; Photosynthetic rate; Transpiration; Competition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582017000100223

Physiological responses of maize and cowpea to intercropping
Provedor de dados: 86
Autores: LIMA FILHO,JOSÉ MOACIR PINHEIRO.
The effect of intercropping on plant water status, gas exchange and productivity of maize (Zea mays L.) cv. Centralmex, and cowpea (Vigna unguiculata L. (Walp)) cv. Pitiuba were evaluated under semi-arid conditions at the Embrapa-Centro de Pesquisa Agropecuária do Trópico Semi-Árido (CPATSA) at Petrolina, PE, Brazil. The treatments were: maize and cowpea as sole crops, at a population of 40,000 plants ha-1, and intercropped at a population of 20,000 plants ha-1. The results obtained in this paper appear to be related to the degree of competition experienced by the components, mainly for water and light. Maize intercropped had higher values of leaf water potential, stomatal conductance, transpiration and photosynthesis than as sole crop. Intercropped cowpea...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant soil relations; Plant water relations; Gas exchange; Cropping systems.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000500008

Physiological studies in corn and sorghum
Provedor de dados: 106
Autores: Pismai Srisukphrasert; Atcharee Rakla; Prakob Jan-aram; Teerasak Manupeerapan; Prasop Depyasuvarn.
5 ill., 8 tables
Palavras-chave: Corn; Maize; Sorghum; Harvesting date; Seed yield; Spacing; Weeding methods; Weed control; Detasseling; Ear; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; สรีรวิทยา; การเก็บเกี่ยว; ระยะระหว่างแถว; การกำจัดวัชพืช; ข้าวโพดฝักอ่อน.
Ano: 1983
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4139

Physiological studies of corn and sorghum production
Provedor de dados: 106
Autores: Pismai Srisukphrasert; Teerasak Manupeerapan; Atcharee Rakla; Nipa Kaewborisutsakul.
7 tables
Palavras-chave: Corn; Maize; Sorghum; Physiology; Growth; Maturity; Spacing; Population densities; Varieties; Downy mildew; Disease resistance; Yields; Dry weight; Quality; ข้าวโพด; ข้าวฟ่าง; ระยะระหว่างแถว; ความหนาแน่นของประชากร; โรคราน้ำค้าง.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4064

Phytate utilization and phosphorus excretion by broiler chickens fed diets containing cereal grains varying in phytate and phytase content
Provedor de dados: 18
Autores: Leytem, A.B.; Willing, B.P.; Thacker, P.A.
Eighty, 12-day-old, male broiler chicks, were fed one of four diets to determine the effects of  feeding grains varying in phytate phosphorus (P) and intrinsic phytase activity on ileal and excreta  P digestibility and composition. The diets contained approximately 970.7 g grain kg?1 (maize, high  fat–low lignin oat, normal barley or low-phytate barley) with the cereal supplying the sole source of  dietary P. The diets were fed for a 7-day acclimation period followed by a 2 day excreta collection  while ileal digesta was collected at slaughter on day 21. The coefficients of ileal apparent digestibility  (CIAD) for P and phytate P ranged from 0.79 (normal barley) to 0.86 (maize and low-phytate barley)  and 0.76 (low-phytate barley) to 0.89 (maize),...
Tipo: Article
Palavras-chave: Soil; Animal; Chemistry.
Ano: 2008
URL: http://eprints.nwisrl.ars.usda.gov/1323/1/1300.pdf

Phytophagous mites on genetically modified maize with Bacillus thuringiensis genes
Provedor de dados: 65
Autores: Ferreira,Tamara Esteves; Fadini,Marcos Antonio Matiello; Mendes,Simone Martins; Marinho,Cidália Gabriela Santos; Cruz,Ivan.
ABSTRACT: The study of non-target organisms such as mites, can provide information about the possible effects of transgenic maize cultivars on the arthropod community. This study aimed to evaluate the abundance of phytophagous mites in the area of Bt maize and evaluate the instantaneous population growth rate, and food preference of phytophagous mites on Bt maize. We registered the species occurrence and the number of adult mite individuals on four maize cultivars, one non-Bt 30F35, and three containing the proteins Cry1Ab (30F35 Yg), Cry1F (30F35 Hx) and Vip3a (Impacto Viptera). Cry proteins disrupt the midgut epithelium of insect pests. The food preference and instantaneous population growth rate (ri) were evaluated using the two-spotted spider mite...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant defense; Non-target organisms; Genetically modified organisms Bt protein; Diptilomiopidae; Eriophyidae; Tetranychidae.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000202

Phytosociology in Degraded and Renewed Pastures in Agrosilvopastoral Systems
Provedor de dados: 87
Autores: DIAS,R.C.; SANTOS,M.V.; FERREIRA,E.A.; BRAZ,T.G.S; FIGUEIREDO,L.V.; CRUZ,P.J.R.; SILVA,L.D.
ABSTRACT: In pastures, the incidence of weeds reduces the productivity and quality of forage. The identification of the weed species in pastures is fundamental to choose the renewal method. Thus, the objective of this work was to perform phytosociology before and after the renewal of a Brachiaria decumbens pasture, with the implantation of agrosilvopastoral systems. Eighteen different crop arrangements for pasture renewal were evaluated. The renewal systems were by eucalyptus integration (at 12 x 2 m or 12 x 3 m spacings) with maize, Brachiaria brizantha cv. Marandu (palisade grass) and/or Macrotyloma axillare (perennial horsegram), or monoculture and intercropping of palisade grass and perennial horsegram, as well as the evaluation of the application or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intercropping; Crop-livestock-forest; Weed; Pasture management.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100274

Phytosociology of weed in the southwestern Goiás region
Provedor de dados: 1
Autores: Santos, Weverton Ferreira; Procópio, Sérgio de Oliveira; Silva, Alessandro Guerra da; Fernandes, Marcelo Ferreira; Santos, Eduardo Ribeiro dos.
 Roundup Ready® technology adoption and the cultivation of a second crop have changed chemical control methods and weed management in the southwest region of Goiás State, Brazil. Considering these changes, this study aimed to perform a phytosociological survey in areas with glyphosate resistant soybeans and conventional soybeans as the main harvest and sorghum, maize, millet or fallow in succession as the second harvest. A multivariate matrix of the floristic composition was constructed, and the indicator values of the individual number and dry biomass of species were measured. Based on the number of individuals, the species Chamaesyce hirta, Bidens subalternans, and Cissampelos ovolifolia were typical of areas cultivated with glyphosate-resistant soybean,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soybean; Second crop; Crop succession; Resistance; Herbicide.; Fitotecnia.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/33049

Phytosociology of weed in the southwestern Goiás region
Provedor de dados: 1
Autores: Santos, Weverton Ferreira; Procópio, Sérgio de Oliveira; Silva, Alessandro Guerra da; Fernandes, Marcelo Ferreira; Santos, Eduardo Ribeiro dos.
 Roundup Ready® technology adoption and the cultivation of a second crop have changed chemical control methods and weed management in the southwest region of Goiás State, Brazil. Considering these changes, this study aimed to perform a phytosociological survey in areas with glyphosate resistant soybeans and conventional soybeans as the main harvest and sorghum, maize, millet or fallow in succession as the second harvest. A multivariate matrix of the floristic composition was constructed, and the indicator values of the individual number and dry biomass of species were measured. Based on the number of individuals, the species Chamaesyce hirta, Bidens subalternans, and Cissampelos ovolifolia were typical of areas cultivated with glyphosate-resistant soybean,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências Agrárias - Agronomia soybean; Second crop; Crop succession; Resistance; Herbicide. Fitotecnia.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/33049

Phytosociology of Weeds in Off-Season Maize Crops in the Middle Paranapanema
Provedor de dados: 87
Autores: GAZOLA,T.; DIAS,M.F.; DUARTE,A.P.; CARBONARI,C.A.; VELINI,E.D.
ABSTRACT: This work is the first one after the consolidation of the introduction of the RR technology in maize and soybean crops, following weed surveys previously carried out in the region of the Middle Paranapanema, São Paulo state. The objective was to carry out a phytosociological survey of weeds in off-season maize crops no-tillage, in the same properties where the studies had been previously carried out, in the described region, taking into account the management of the weed community adopted by farmers, and the percentage of plant coveron the soil. The surveys were carried out in 19 farms conducted under no-tillage systems, with off-season maize cultivated in soybean succession, both RR crops, in nine municipalities of the São Paulo region of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicides; Weeds; No-tillage; Zea mays.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100313

Pig slurry and nutrient accumulation and dry matter and grain yield in various crops
Provedor de dados: 90
Autores: Lourenzi,Cledimar Rogério; Ceretta,Carlos Alberto; Brunetto,Gustavo; Girotto,Eduardo; Tiecher,Tadeu Luis; Vieira,Renan Costa Beber; Cancian,Adriana; Ferreira,Paulo Ademar Avelar.
Pig slurry (PS) represents an important nutrient source for plants and using it as fertilizer makes greater nutrient cycling in the environment possible. The aim of this study was to assess how PS application over a period of years can affect grain yield, dry matter production and nutrient accumulation in commercial grain and cover crops. The experiment was carried out in an experimental area of the Universidade Federal de Santa Maria, in Santa Maria, RS, Brazil, from May 2000 to January 2008. In this period, 19 grain and cover crops were grown with PS application before sowing, at rates of 0, 20, 40 and 80 m³ ha-1. The highest PS rate led to an increase in nutrient availability over the years, notably of P, but also of nutrients that are potentially toxic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Manure; Yield; Crop rotation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000300027

Pigmentación de Fusarium verticillioides (Sacc.) como factor de virulencia en plántulas de maíz en México.
Provedor de dados: 32
Autores: Solano Báez, Alma Rosa.
Existen antecedentes de que los pigmentos producidos por especies de Fusarium tienen efecto fitotóxico en plantas hospedantes de este patógeno, son inhibidores de germinación de semillas, además de actividad antibacterial. La influencia que pudieran tener en la virulencia aun no se define, por lo que en esta investigación se obtuvieron mazorcas de maíz, asintomáticas y  con síntomas de pudrición de mazorca que fueron colectadas en el ciclo primavera-verano de 2008 del estado de Veracruz  México. Se comparó la patogenicidad de los aislamientos de este hongo con micelio color blanco, rosado o morado. También, se compararon diferentes concentraciones de papa en medio de cultivo papa- dextrosa-agar (PDA) para observar el efecto en la pigmentación de los...
Palavras-chave: Semillas sintomáticas; Semillas asintomáticas; Morfología; Filogenia; Ear rot; Symptomatic seeds; Asymptomatic seeds; Morphology; Phylogeny; Maestría; Fitopatología.
Ano: 2010
URL: http://hdl.handle.net/10521/228

Pigmentación de Fusarium verticillioides (Sacc.) como factor de virulencia en plántulas de maíz en México.
Provedor de dados: 32
Autores: Solano Báez, Alma Rosa.
Existen antecedentes de que los pigmentos producidos por especies de Fusarium tienen efecto fitotóxico en plantas hospedantes de este patógeno, son inhibidores de germinación de semillas, además de actividad antibacterial. La influencia que pudieran tener en la virulencia aun no se define, por lo que en esta investigación se obtuvieron mazorcas de maíz, asintomáticas y  con síntomas de pudrición de mazorca que fueron colectadas en el ciclo primavera-verano de 2008 del estado de Veracruz  México. Se comparó la patogenicidad de los aislamientos de este hongo con micelio color blanco, rosado o morado. También, se compararon diferentes concentraciones de papa en medio de cultivo papa- dextrosa-agar (PDA) para observar el efecto en la pigmentación de los...
Palavras-chave: Semillas sintomáticas; Semillas asintomáticas; Morfología; Filogenia; Ear rot; Symptomatic seeds; Asymptomatic seeds; Morphology; Phylogeny; Maestría; Fitopatología.
Ano: 2010
URL: http://hdl.handle.net/10521/228

Pilot project on farm testing
Provedor de dados: 106
Autores: Tawatchai Prasatsrisupab.
1 ill., 3 tables
Palavras-chave: Corn; Maize; On farm testing; Pilot project; Variety trials; Varieties; Fertilizers; Yields; ข้าวโพด; การทดสอบพันธุ์; ไร่นาเกษตรกร; โครงการนำร่อง.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3835

Pioneers experience in Asia
Provedor de dados: 106
Autores: Mishra, Ken N.
Palavras-chave: Corn; Maize; Plant breeding; Hybrids; Asia; ข้าวโพด; บริษัทไพโอเนียร์ ไฮเบรด; เมล็ดพันธุ์; พันธุ์ลูกผสม.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4074

Pithecellobium dulce, Tagetes erecta and Cosmos bipinnatus on reducing enteric methane emission by dairy cows
Provedor de dados: 65
Autores: Pineda,Gloria Stefanny Hernández; Beltrán,Paulina Elizabeth Pedraza; Benaouda,Mohammed; García,José Manuel Palma; Nova,Francisca Avilés; Molina,Luisa; Ortega,Octavio Alonso Castelán.
ABSTRACT: The aim of the present research was to evaluate the effect of Pithecellobium dulce, Tagetes erecta and Cosmos bipinnatus on methane emission, milk yield and dry matter intake in dairy cattle. A 4×4 Latin square experimental design was employed, using four multiparous Holstein cows of 553±72.4kg body weight, at mid lactation and average milk yield of 17.3±3kg/day. The experiment lasted 92 days, divided into four experimental periods of 23 days each. All cows had free access to maize and alfalfa silage in a 50:50 proportion, 4kg of concentrate/day and ad libitum access to water. Treatments consisted in supplementation of 0.5kg/day of the experimental plants, with one control treatment without supplementation. Each cow received one of each treatment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Methane; Cattle; Climate change; Mitigation; Tannins.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001000650

Planning of the Agrifood supply chain: a case study for the FVG region
Provedor de dados: 31
Autores: Rosa,   Franco; Sossai,   E.; Vasciaveo,   Michela.
The aim of this paper is to discuss the planning of regional Agri-food supply chain using an integrated database territorial information. The objective is to optimize the chain performance using alternative solutions. Evidences are obtained with a case study performed in FVG region applied to maize-crop. Firstly it is explored the chain network composed by farms, collection points and processing plants; then territorial, agronomic and climate information are integrated to simulate realistic production forecast model applied to maize crop. Finally a program from graph analysis is used to allocate the production through the chain. The economic performance is evaluated using the net revenues varying with the intensification of maize production and adoption of...
Tipo: Conference Paper or Presentation
Palavras-chave: Data integration; Supply chain; Decision support system; Crop simulation; Regional policy.; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Food Consumption/Nutrition/Food Safety; Labor and Human Capital.
Ano: 2010
URL: http://purl.umn.edu/95226

Plant BiP gene family: differential expression, stress induction and protective role against physiological stresses
Provedor de dados: 61
Autores: Carolino,Sonia Madali Boseja; Vaez,Juliana Rocha; Irsigler,André Southernman Teixeira; Valente,Maria Anete S.; Rodrigues,Leonardo Augusto Zebral; Fontes,Elizabeth Pacheco Batista.
In contrast to yeast or mammalian counterpart, BiP (Binding Protein) from several plant species, such as maize, tobacco, Arabidopsis and soybean, is encoded by a multigene family. A systematic characterization and analysis of soybean BiP expression have provided evidence for the existence of multiple, complex regulatory mechanisms controlling plant BiP gene expression. In support of this observation, the soybean BiP gene family has been shown to exhibit organ-specific expression and differential regulation in response to abiotic stresses through distinct signaling pathways. As a member of the stress-regulated HSP70 family of protein, the elucidation of plant BiP function and regulation is likely to lead do new strategies to enhance crop tolerance to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endoplasmic reticulum; ER stressors; Grp78; Molecular chaperone; Unfolded protein response; Water stress.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202003000200001

Plant breeding group discussion
Provedor de dados: 106
Autores: Singh, Joginder; Moore, C.L.
Palavras-chave: Corn; Maize; Plant breeding; Early maturity; Stalk rot; Breeding systems; ข้าวโพด; พันธุ์เบา; โรคลำต้นเน่า; การปรับปรุงพันธุ์.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3910

Plant growth-promoting bacteria associated with nitrogen fertilization at topdressing in popcorn agronomic performance
Provedor de dados: 53
Autores: Spolaor,Leandro Teodoski; Gonçalves,Leandro Simões Azeredo; Santos,Odair José Andrade Pais dos; Oliveira,André Luiz Martinez de; Scapim,Carlos Alberto; Bertagna,Filipe Augusto Bengosi; Kuki,Mauricio Carlos.
ABSTRACT The use of plant growth-promoting bacteria is a promising alternative with low environmental impact to increase the efficiency of use of chemical fertilizers, ensuring high yield with better cost-effective ratio. In maize crops, several studies have demonstrated an increased yield when Azospirillum-based inoculants are used. In the case of popcorn, there are no available studies related to use of inoculation and its response on yield parameters. Thus, the aim of this study was to evaluate the field performance of popcorn when inoculated with the commercial product Masterfix L (A. brasilense Ab-V5 and A. brasilense Ab-V6) and the non-commercial inoculant UEL (A. brasilense Ab-V5 + Rhizobium sp. 53GRM1) associated with nitrogen fertilization. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Azospirillum brasilense; Rhizobium sp.; Inoculants; Grain yield.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000100033

Plant prebiotics and human health: Biotechnology to breed prebiotic-rich nutritious food crops
Provedor de dados: 69
Autores: Dwivedi,Sangam; Sahrawat,Kanwar; Puppala,Naveen; Ortiz,Rodomiro.
Microbiota in the gut play essential roles in human health. Prebiotics are non-digestible complex carbohydrates that are fermented in the colon, yielding energy and short chain fatty acids, and selectively promote the growth of Bifidobacteria and Lactobacillae in the gastro-intestinal tract. Fructans and inulin are the best-characterized plant prebiotics. Many vegetable, root and tuber crops as well as some fruit crops are the best-known sources of prebiotic carbohydrates, while the prebiotic-rich grain crops include barley, chickpea, lentil, lupin, and wheat. Some prebiotic-rich crop germplasm have been reported in barley, chickpea, lentil, wheat, yacon, and Jerusalem artichoke. A few major quantitative trait loci and gene-based markers associated with...
Tipo: Journal article
Palavras-chave: Germplasm; Gut microbiota; Human health; Non-digestible fibers; Transgene.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000500008

Planting dates with lower climatic risk, for maize grown, during the winter season “safrinha”, in Parana State, Brazil
Provedor de dados: 1
Autores: Gonçalves, Sergio L.; IAPAR; Caramori, Paulo H.; IAPAR; Wrege, Marcos S.; IAPAR; Shioga, Pedro; IAPAR; Gerage, Antonio C.; IAPAR.
The maize crop, Zea mays L. (Poaceae), grown during the winter season “safrinha” in Parana State, southern Brazil, can be exposed to severe yield losses caused by unfavorable climatic events, depending on the planting date. In this paper, a methodology was adapted to assess the risk of frost during the crop cycle, with emphasis on the period between flowering and maturation, and the risk of water deficit during plant establishment and at flowering. Frost risk during the 30 days before maturation was considered as the most restrictive factor. Associating frost and water deficit risk, it was possible to identify eight distinct regions, with homogeneous planting dates of lower risk ranging from January to March
Palavras-chave: 5.00.00.00-4    Ciências Agrárias risco climático; Zoneamento; Milho safrinha; Época de semeadura 5.00.00.00-4    Ciências Agrárias.
Ano: 2002
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2281

Planting of fast-growing trees for recovery of agricultural areas in the Eastern of Brazilian Amazon: studying case of maize and cassava prdution
Provedor de dados: 190
Autores: Brienza Júnior, Silvio; Oliveira, Raimundo Parente de; Denich, Manfred; Vlek, Paul L.G.
The objective of the present paper was to evaluate the survival of planted leguminous trees to restore degraded areas and yields of maize and cassava in traditional farming system. The trees species Acacia angustissima, Clitoria racemosa, Inga edulis, and Acacia mangium were planted at spacing of 1 m x 1 m, 2 m x 1 m and 2 m x 2 m. Sclerolobium paniculatum was planted only at spacing of 2 m x 1 m. The maize, remained in the cropping system during the first four months, and it was considered as monocropping phase and, yielded 1,890 +/- 32 kg ha-1. The survival of planted trees was not negatively impacted by the presence of agricultural crops. Regardless of the spacing, the planted trees did not cause a negative impact on dry weight of cassava root. There...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fallow enrichment; Density of planting; Degraded land; Leguminous tree Enriquecimento de capoeira; Espaçamento de plantio; Área degradada; Árvores leguminosas.
Ano: 2011
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/317

Plantio da leucena e do milho intercalar.
Provedor de dados: 14
Autores: PEREIRA FILHO, I. A.; CRUZ, J. C.; COELHO, A. M.
bitstream/item/30897/1/ct-10.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize; Planta leguminosa; Feed legumes.; Cerrado; Leucaena; Milho; Zea Mays.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/480986

Plantio tardio de milho no cerrado de Vilhena.
Provedor de dados: 14
Autores: SAMPAIO, N. F.
Apresenta os resultados de pesquisas e recomendacoes feitas pela EMBRAPA-Centro de Pesquisa Agroflorestal de Rodnonia (CPAF-Rondonia), visando definir um sistema de cultivo de milho, para o periodo de fevereiro a junho, demostrando assim, ganho de eficiencia no uso da terra.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Epoca; Brasil; Rondonia; Vilhena; Maize.; Cerrado; Milho; Plantio; Zea Mays.; Brazil.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697873

Plant-mediated rhizospheric interactions in maize-pigeon pea intercropping enhance soil aggregation and organic phosphorus storage
Provedor de dados: 21
Autores: Garland, Gina; Bünemann, E. K.; Oberson, A.; Frossard, E.; Six, J.
Background and aims  In Malawi, strategies are being sought to boost maize production through improvements in soil fertility. This study assessed the impact of intercropping maize (Zea mays) with pigeon pea (Cajanus cajan) in Lixisols of Malawi on yield, biological N fixation, soil aggregation, and P forms within soil aggregates.  Methods  Maize and pigeon pea were grown intercropped in pots, with varying degrees of root interaction in order to understand the relative importance of biochemical versus physical rhizospheric interactions. Following harvest, soils were separated into aggregate fractions using wet-sieving, and the nutrient content of all fractions was assessed.  Results  The proportion of macroaggregates and microaggregates increased by 52 and...
Tipo: Journal paper
Palavras-chave: Soil quality; Root crops.
Ano: 2017
URL: http://orgprints.org/32324/1/garland-etal-2017-PlantSoil-Vol-415-Issue1-2-p37-55.pdf

PLOT SIZE AND MAIZE PRODUCTIVITY IN ZAMBIA: THE INVERSE RELATIONSHIP RE-EXAMINED
Provedor de dados: 31
Autores: Kimhi,   Ayal.
Agricultural productivity is known to decline with farm size in many developing countries.  This may be a result of market imperfections, such as missing rural labor markets.  On the other hand, there may be economies of scale in farming, due, for instance, to the importance of lumpy inputs.  Hence, it is not theoretically obvious that the inverse relationship prevails in all situations.  Indeed, several studies found non-monotonic relationships between productivity and farm size, with productivity decreasing with size up to a certain size and increasing beyond that point. This paper examines the relationship between Maize productivity and plot size in Zambia.  If offers a unique empirical approach.  First, it focuses on Maize, which is the major crop on...
Tipo: Working or Discussion Paper
Palavras-chave: Maize Yield; Plot Size; Inverse Relationship; Recursive Decisions; Two-stage Estimation; Two-sided Tobit; Selectivity Correction; Crop Production/Industries; O1 (Economic Development); Q1 (Agriculture).
Ano: 2003
URL: http://purl.umn.edu/14980

Plumule inoculation of corn with Sclerospora sacchari
Provedor de dados: 106
Autores: Sun, M.H.; Tseng, C.M.
2 tables
Palavras-chave: Corn; Maize; Plumule inoculation; Sclerospora sacchari; Downy mildew; Artificial inoculation; ข้าวโพด; การปลูกเชื้อ; โรคราน้ำค้าง.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3901

POLICY REFORMS AND MEXICAN AGRICULTURE: VIEWS FROM THE YAQUI VALLEY
Provedor de dados: 31
Autores: Naylor,   Rosamond L.; Falcon,   Walter P.; Puente-Gonzalez,   Arturo.
The overall effects of policy reforms enacted during the 1990s in Mexico on financial and economic profitability of Yaqui Valley agriculture are assessed in this study, which describes the reforms, examines how exogenous shocks affected the reform process, and documents how rural people and institutions adjusted to the changed circumstances. Virtually all of the reforms affected Yaqui Valley farmers because of the commercial character of their agriculture (relatively large, irrigated wheat farms), their close proximity to the US, and the new "openness" of Mexico's economy. By almost any standard, the reforms were both wide-ranging and successful, at least as measured in efficiency terms, yet the Yaqui Valley's rural communities face significant challenges...
Tipo: Working or Discussion Paper
Palavras-chave: Agricultural and Food Policy.
Ano: 2001
URL: http://purl.umn.edu/23719

Policy Space for Mexican Maize: Protecting Agro-biodiversity by Promoting Rural Livelihoods
Provedor de dados: 31
Autores: Wise,   Timothy A.
Since the introduction of the North American Free Trade Agreement (NAFTA) in 1994, traditional maize farmers in Mexico have faced difficult economic conditions. In barely more than a decade, as many as one million farmers may have abandoned their land under economic pressure from rising imports, low prices for maize and other traditional crops, weak local and regional demand, and large reductions in public sector support for agriculture. The losses are environmental as well as economic. With the loss of traditional maize, there has been a documented loss of the agricultural biodiversity of which these farmers and their ancestors have been stewards for centuries. With maize trade scheduled to be fully liberalized under NAFTA in 2008, many farm groups are...
Tipo: Working or Discussion Paper
Palavras-chave: Agribusiness; Agricultural and Food Policy; Agricultural Finance; Community/Rural/Urban Development; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Industrial Organization; Institutional and Behavioral Economics; International Development; International Relations/Trade; Labor and Human Capital; Land Economics/Use; Political Economy; Production Economics; Research and Development/Tech Change/Emerging Technologies.
Ano: 2007
URL: http://purl.umn.edu/37278

Poliennal results on soil N management and maize N nutrition by green manuring
Provedor de dados: 21
Autores: Benincasa, Dr Paolo; Tosti, Dr Giacomo; Boldrini, Dr Arianna; Tei, Prof Francesco; Guiducci, Prof Marcello.
Several field trials were carried out in 5 years in Central Italy to study the effect of green manuring on soil N management and N availability for grain maize as a succeeding crop. Hairy vetch, field bean, rapeseed and barley were grown in autumn-winter as pure crops or mixed in leg-non leg couples. Maize was sown in early spring just after green manure incorporation. The amount of N supplied by green manures, as well as the maize N uptake and the estimated N effect (i.e. the N taken up by maize that actually derives from green manure N) depended on species used, but with a high between-year variability. The N effect at harvest over 3 years was found to depend on the amount of incorporated biomass (DW) and its N content (N%) according to a multiple linear...
Tipo: Conference paper, poster, etc.
Palavras-chave: Farm nutrient management.
Ano: 2008
URL: http://orgprints.org/11581/1/Benincasa_11581_ed.doc

Política agrícola y heladas en el medio rural : caso de los productores de maíz en Tlachichuca, Puebla.
Provedor de dados: 32
Autores: Ramírez Huerta, Mónica.
El objetivo de esta investigación fue analizar la distribución espacial de las heladas en el estado de Puebla y la importancia de la política agrícola ante las heladas en la producción de maíz de temporal en el municipio de Tlachichuca, Puebla en 2011. En la investigación se realizó una revisión bibliográfica, recorridos de campo y se elaboró una base de datos para relacionar la presencia de heladas y pobreza en los 217 municipios del estado de Puebla, también se aplicó un cuestionario a 76 agricultores afectados por helada en Tlachichuca. Los resultados mostraron que espacialmente la mayor superficie dañada en el cultivo del maíz y con alto porcentaje de pobreza en su población fue el Valle de Serdán. En el municipio de Tlachichuca, el 94.7% de los...
Palavras-chave: Agricultura de temporal; Campesino; Pobreza; Siniestro; Peasant; Poverty; Seasonal agriculture; Sinister; Maestría; EDAR; Estrategias para el Desarrollo Agrícola Regional.
Ano: 2013
URL: http://hdl.handle.net/10521/2095

Política de Preços e Distribuição da Ajuda Alimentar de Milho Amarelo em Moçambique: Uma Análise de Alternativas
Provedor de dados: 31
Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambique
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Food policy; Mozambique; Yellow maize; Food aid; Food Security and Poverty; Q18.
Ano: 1993
URL: http://purl.umn.edu/56014

Popcorn genotypes resistance to fall armyworm
Provedor de dados: 65
Autores: Oliveira,Nádia Cristina de; Suzukawa,Andréia Kazumi; Pereira,Carolina Bertuzzi; Santos,Hayssa Vilela; Hanel,Aldo; Albuquerque,Fernando Alves de; Scapim,Carlos Alberto.
ABSTRACT: The aim of this study was to evaluate popcorn genotypes for resistance to the fall armyworm, Spodoptera frugiperda. The experiment used a completely randomized design with 30 replicates. The popcorn genotypes Aelton, Arzm 05 083, Beija-Flor, Colombiana, Composto Chico, Composto Gaúcha, Márcia, Mateus, Ufvm Barão Viçosa, Vanin, and Viviane were evaluated,along with the common maize variety Zapalote Chico. Newly hatched fall armyworm larvae were individually assessed with regard to biological development and consumption of food. The data were subjected to multivariate analyses of variance and genetic divergence among genotypes was evaluated through the clustering methods of Tocher based on generalized Mahalanobis distances and canonical variable...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibiosis; Nutrition index; Plant breeding; Spodoptera frugiperda.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000200154

Population dynamic study of rodents in maize
Provedor de dados: 106
Autores: Puangtong Boonsong; Korntong Puangprakhon; Yuvaluk Khoprasert; Taksin Archawakom; Chompoonut Chanyapate; Vera Chamkrachang.
4 ill., 4 tables
Palavras-chave: Corn; Maize; Rodents; Population dynamics; ข้าวโพด; หนู; การเปลี่ยนแปลงประชากร.
Ano: 1992
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4509

Population dynamics of maize insects on seven varieties of maize
Provedor de dados: 106
Autores: Sawarng Charoenying.
1 table
Palavras-chave: Corn; Maize; Insect pests; Population dynamics; ข้าวโพด; ประชากร; แมลงศัตรูพืช; พันธุ์.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4372

Population dynamics of the corn thrips, Frankliella williamsi Hood. on baby and sweet corn varieties
Provedor de dados: 106
Autores: Sawarng Charoenying; Somchai Isichaikul; Amornsak, W.
5 tables
Palavras-chave: Corn; Maize; Corn thrips; Frankliniella williamsi; Sweet corn; Baby corn; Vegetable corn; Population dynamics; Insect pests; ข้าวโพด; ข้าวโพดหวาน; ข้าวโพดฝักอ่อน; เพลี้ยไฟ; ประชากร.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4416

Population fluctuation of Spodoptera frugiperda eggs and natural parasitism by Trichogramma in maize - doi: 10.4025/actasciagron.v35i3.16769
Provedor de dados: 1
Autores: Bastos Dequech, Sônia Thereza; Universidade Federal de Santa Maria; Camera, Cátia; Universidade Federal de Santa Maria; Sturza, Vinicius Soares; Universidade Federal de Santa Maria; Ribeiro, Leandro do Prado; Universidade de São Paulo; Querino, Ranyse Barbosa; Empresa Brasileira de Pesquisa Agropecuária; Poncio, Sônia; Universidade Federal de Santa Maria.
This study aimed to evaluate the fluctuation of S. frugiperda eggs and natural parasitism by Trichogramma and identify and quantify parasitoid species in maize fields in the state of Rio Grande do Sul, Brazil. Surveys were carried out in two growing seasons: in 2006/2007 we assessed one growing season (late sowing) in Santa   Maria, and in 2007/2008 we assessed two growing seasons (early and late sowing) in Santa Bárbara do Sul. Daily air temperature and rainfall were recorded at both locations. In each evaluation, entire plants were examined for the presence or absence of S. frugiperda egg masses, which were analyzed for larvae hatching or parasitoid emergence. The number of S. frugiperda eggs is higher between 8 and 30 days after plant emergence,...
Palavras-chave: Agronomia; Fitossanidade biological control; Fall armyworm; Noctuidae; Trichogrammatidae; Zea mays L. entomologia agrícola.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16769

Population structure and genetic diversity of Brazilian popcorn germplasm inferred by microsatellite markers
Provedor de dados: 69
Autores: da Silva,Tereza Aparecida; Belizário Cantagalli,Liriana; Saavedra,Javier; Lopes,Ana Daniela; Aparecida Mangolin,Claudete; Pires da Silva Machado,Maria de Fatima; Scapim,Carlos Alberto.
Background The genetic diversity and structure of 31 popcorn accessions of the germplasm bank of the State University of Maringá were assessed using 30 microsatellite primers. Results 127 alleles were identified from 30 evaluated loci. The number of alleles per locus ranged from two to eight. The overall mean of the polymorphic loci averaged 79.89%. The primers UMC1549 and UMC1072 detected polymorphism in all accessions analyzed. The mean observed heterozygosity ranged from 0.07 to 0.30 and the highest proportion of heterozygous plants was observed in accession BOZM 260 (Ho = 0.30). The analysis of molecular variance revealed that 60% of the total genetic variation was found within accessions and 40% was found between accessions. The Bayesian clustering...
Tipo: Journal article
Palavras-chave: Genetic variability; Maize; Molecular marker.
Ano: 2015
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000300007

Population Study of Diabrotica speciosa (Ger.) (Coleoptera: Chrysomelidae) in Fall / Winter Season
Provedor de dados: 65
Autores: Ventura,Maurício Ursi; Gomes,Marcos Roberto.
Population studies of D. speciosa on fall / winter crops were conducted. Larvae were monitored on maize (Zea mays L.), wheat (Triticum aestivum L.) and black oats (Avena strigosa Schreb.) and beetles on soybeans (Glycine max (L.) Mill., maize, common beans (Phaseolus vulgaris L.), wheat and black oats from March 23, 2001 to August 24, 2001. Soybean, maize, common beans, wheat and oats were sown on December 28, 2000; February 9, 2001; March 2, 2001; April 26, 2001 and May 11, 2001, respectively. Maize and common beans were grown on latter growing season. Adult beetles of D. speciosa were collected throughout the sampling period. Greatest beetles population peak occurred on wheat in August 3, 2001 which coincided with flowering period. Population dynamics of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Host plants; Phenology; Latter growing season; Samples.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000600042

Position of maize in Indian agriculture
Provedor de dados: 106
Autores: Dhawan, N.L.
2 tables
Palavras-chave: Corn; Maize; Production; Indian agriculture; ข้าวโพด; การผลิต; การเกษตรในอินเดีย.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3719

Post Market Monitoring of GM Herbicide-Tolerant Crops
Provedor de dados: 17
Autores: Alan M. Dewar.
As soon as humans adopted agriculture as the principle means of feeding themselves, they have had an effect on the environment, and by implication, also on biodiversity. It is not possible to grow crops in an intensive manner without doing so, but it is necessary to do so to feed the population. In this respect, the use of herbicides or other weed control practices (e.g. hand-hoeing) inevitably will have an effect on biodiversity, whether those methods are used in conventional, organic or genetically modified herbicide-tolerant (GMHT) crops. &amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;Recent literature from the UK following the Farm Scale Evaluations (FSE) of the environmental impact of GMHT oilseed rape, maize and sugar beet suggests that the recommended weed...
Tipo: Presentation
Palavras-chave: Earth &amp; Environment; Plant Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4462/version/1

Postharvest nitrous oxide emissions from a subtropical oxisol as influenced by summer crop residues and their management
Provedor de dados: 90
Autores: Escobar,Luisa Fernanda; Amado,Telmo Jorge Carneiro; Bayer,Cimélio; Chavez,Luis Fernando; Zanatta,Josiléia Acordi; Fiorin,Jackson Ernani.
Nitrous oxide (N2O) is the most important non-CO2 greenhouse gas and soil management systems should be evaluated for their N2O mitigation potential. This research evaluated a long-term (22 years) experiment testing the effect of soil management systems on N2O emissions in the postharvest period (autumn) from a subtropical Rhodic Hapludox at the research center FUNDACEP, in Cruz Alta, state of Rio Grande do Sul. Three treatments were evaluated, one under conventional tillage with soybean residues (CTsoybean) and two under no-tillage with soybean (NTsoybean) and maize residues (NTmaize). N2O emissions were measured eight times within 24 days (May 2007) using closed static chambers. Gas flows were obtained based on the relations between gas concentrations in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Global warming; Subtropical soils; Greenhouse gases; Soil tillage; Crop rotation.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000200024

Post-harvest quality of papaya coated with polivinilic alcohol and maize starch
Provedor de dados: 64
Autores: Pigozzi,Mariana Teixeira; Silva,Vanessa Mendes; Mendes,Fabrícia Queiroz; Oliveira,Isadora Rebouças Nolasco de; Moraes,Allan Robledo Fialho e; Lopes,Everaldo Antônio.
ABSTRACT Climacteric fruits have short postharvest shelf life. Coating is an alternative to minimize fruit ripening and post-harvest losses. Maize starch (S) and polivinilic alcohol - PVOH (P), isolated or blended, can be used in the formulation of coatings. However, little is known about the potential of PVOH-containing coatings in postharvest conservation of fruits. Papaya were aftercoated with 5 coating formulations: 3% starch (S), 3% PVOH (P), 2.25% S + 0.75% P, 1.5% S + 1.5% P and 0.75% S + 2.25% P. The fruits were kept at room temperature (20 ± 5 °C and 70 ± 10% RH) and physicochemical characteristics were evaluated for up to eight days. Uncoated fruits were used as control. In general, maize starch and PVOH. In general, maize starch and PVOH...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carica papaya L.; Storage; Respiratory rate; Fermentation; Firmness.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542021000100400

Post-market monitoring: legal framework in Brazil and first results
Provedor de dados: 17
Autores: Marcia A. Melo; Ederson  A. Kido; Paulo P. Andrade.
Brazil is presently (2010) the second largest producer of Genetically Modified (GM) crops. The legal framework to support both research activities and the commercial release of Genetically Modified Organisms (GMOs) is, however, very recent, as the Biosafety Law dates back from 2005. After the indispensable risk analysis, done by National Technical Committee for Biosafety (CTNBio), a GM plant can be approved for commercial release. Nevertheless, as stated in the Normative Resolution nr. 5 (NR-5), 2008, the post-market monitoring is mandatory. However, the first GM crop in Brazil, the herbicide tolerant soybean, was harvested in 2005. The CTNBio asked, then, for a monitoring plan and the applicant designed a complex study focused on case-specific monitoring....
Tipo: Poster
Palavras-chave: Biotechnology; Plant Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4528/version/1

Potassium doses in previous crops and effect on soybean in succession
Provedor de dados: 91
Autores: Bossolani,João W.; Lazarini,Edson; Souza,Luiz G. M. de; Parente,Tiago de L.; Caioni,Sheila; Biazi,Naira Q. de.
ABSTRACT Early potassium fertilization in previous crops may be beneficial to the main crop in succession. The objective of this study was to investigate the behavior of the soybean crop as a function of potassium (K) doses in the previous crops, associated or not with K application in soybean. The experiment was carried out from 2012 to 2015 in an experimental area of the Faculty of Engineering, UNESP, Campus of Ilha Solteira-SP, located in Selvíria-MS, Brazil. For the previous crops, a randomized block design was used in a 3 x 4 factorial scheme with four replications, i.e., three previous crops (maize, sorghum and millet) and four K doses (0, 35, 70 and 120 kg ha-1 of K2O). For soybean in succession, a randomized complete block design was used in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilization of systems; Cycling of nutrients; Glycine max (L.) Merrill.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000200090

Potassium leakage and maize seed physiological potential
Provedor de dados: 63
Autores: Miguel,Mariane Victorio de Carvalho; Marcos Filho,Julio.
Seed production usually requires fast decisions to improve the efficacy of seed handling during harvesting, processing and storage. Seed technologists have focused on the development or improvement of procedures which allow rapid and consistent identification of higher quality seed lots. This research verified the effectiveness of the potassium leachate test on the evaluation of the physiological potential of maize seeds in comparison to recommended seed vigor tests. Five seed lots of the hybrid Avant were submitted to the potassium leachate, standard germination, first count, accelerated aging, electrical conductivity, field emergence and cold tests. The amount of potassium leachate was determined after seed imbibition for 30, 60, 90, 120, 150 and 180...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Seeds; Analysis; Vigor.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000200017

Potasssium chloride as a nutrient seed primer to enhance salt‑tolerance in maize
Provedor de dados: 86
Autores: Badar‑uz‑Zaman,; Ali,Arshad; Hyder,Syed Ishtiaq; Arshadullah,Muhammad; Bhatti,Saqib Umar.
The objective of this work was to determine if KCl could be a useful nutrient primer for safe seed germination in maize crop under salt stress conditions. Seed priming was done using 50 mmol L‑1 of muriate of potash, and germination and seedling growth were evaluated after salt stress with NaCl up to 50 mmol L‑1. Another set of seeds was tested under the same salt stress conditions without priming. Under salinity stress, germination percentage, germination rate index, germination coefficient, and seedling vigor indexes were higher in primed seeds. In unprimed seeds, mean germination time increased, while the germination rate index and the fresh and dry matter mass decreased more sharply with salinity stress. The Na/K ratio was higher in unprimed seeds.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Muriate of potash; Osmopriming; Saline stress; Sodium chloride.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000800020

Potencial del germoplasma derivado de maíces nativos de Tamaulipas en los Valles Altos, transición y subtrópico.
Provedor de dados: 32
Autores: Pecina Martínez, José Agapito.
El objetivo de esta investigación fue estudiar los cambios fenológicos y morfológicos ocurridos en progenies derivadas, por autofecundación, de poblaciones nativas de Tamaulipas, así como, determinar si dichos cambios favorecen la adaptación a diversas condiciones ambientales y pueden mostrar mayor potencial de rendimiento al evaluar las cruzas de las líneas avanzadas e identificar las que puedan en un futuro utilizarse en programas de fitomejoramiento para ambientes diversos. Se partió de 35 poblaciones: 29 nativas de diferentes zonas ecológicas de Tamaulipas, y otras seis materiales mejorados de Tamaulipas o de Valles Altos. En Valles Altos se comenzó con la derivación de líneas S1 de todas las poblaciones mencionadas anteriormente; se realizó una...
Palavras-chave: Poblaciones nativas de maíz; Mejoramiento; Aprovechamiento de germoplasma; Native maize populations; Breeding; Germplasm utilization; Doctorado; Genética.
Ano: 2012
URL: http://hdl.handle.net/10521/1771

Potential Consequences of Intra-Regional Trade in Short-Term Food Security Crises in Southeastern Africa
Provedor de dados: 31
Autores: Haggblade,   Steven; Nielson,   Hunter; Govereh,   Jones; Dorosh,   Paul A.
A report prepared by Michigan State University for the World Bank under contract No. 7144132, Strengthening Food Security in Sub-Saharan Africa through Trade Liberalization and Regional Integration
Tipo: Report
Palavras-chave: Africa; Trade; Emergency; Food Security and Poverty; International Relations/Trade; Q13.
Ano: 2008
URL: http://purl.umn.edu/55376

Potential effects of pollen from stacked Bt maize on non-target Lepidoptera in agrarian systems
Provedor de dados: 17
Autores: Mechthild  Schuppener; Alan J. Slusarenko; Stefan  Rauschen.
The cultivation of genetically engineered (GE) maize expressing Lepidopteran specific Bt proteins poses potential risk for non-target butterflies. Pollen is dispersed by wind in the surroundings of maize fields, deposited on weeds and taken up by non-target butterfly lavae. While MON810 contains low concentrations of Bt protein in pollen, this is not necessarily true for new GE maize lines.&amp;#xd;&amp;#xa;&amp;#xd;&amp;#xa;Species appropriate for a post market environmental monitoring (PMEM) should (i) have a small host range to ensure a comprehensive inventory, (ii) be representative and (iii) be common in agrarian landscapes. Rare species seem to be inappropriate (Aviron et al. 2009). We selected the Small Tortoiseshell (_Aglais urticae_) and the...
Tipo: Poster
Palavras-chave: Earth &amp; Environment; Plant Biology.
Ano: 2010
URL: http://precedings.nature.com/documents/4491/version/1

Potential for Intra-Regional Maize Trade in Southern Africa: an Analysis for Zambia at the Sub-National Level
Provedor de dados: 31
Autores: Haggblade,   Steven; Jayne,   Thomas S.; Tschirley,   David L.; Longabaugh,   Steven.
This working paper explores the prospects for regional                         maize trade in helping to stabilize food availability and prices                          in Zambia. It reviews these general prospects within the                         maize economy of southern Africa. Given the important                         regional differences in Zambia’s food economy, it explores                         spatial differences in national food production, consumption                         and marketed surpluses. It also evaluates the impact of                         regional maize trade on price stability and food security in                         different parts of Zambia. The empirical evidence from                         Zambia, summarized in this...
Tipo: Report
Palavras-chave: Food security; Policy; Zambia; Africa; Maize; Trade; Crop Production/Industries; Q17.
Ano: 2008
URL: http://purl.umn.edu/54494

Potential Markets for Herbicide Resistant Maize Seed for Striga Control in Africa
Provedor de dados: 31
Autores: De Groote,   Hugo; Wangare,   Lucy; Kanampiu,   Fred; Odendo,   Martins; Friesen,   Dennis.
Striga is an obligate parasitic weed attacking cereal crops in Subsaharan Africa. In Western Kenya, it is identified by farmers as their major pest problem in maize. A new technology, consisting of seed coating of herbicide tolerant maize varieties, has prove to be very effective in farmer fields. To bring this technology to the farmer, a sustainable delivery system needs to be developed, preferably through the private sector. To help of the seed companies develop a strategy, the potential market for this technology is hereby calculated, combines different data sources into a Geographic Information System (GIS). Superimposing secondary data, field surveys, agricultural statistics and farmer surveys makes it possible to clearly identify the Striga-prone...
Tipo: Conference Paper or Presentation
Palavras-chave: Maize; Striga; Africa; Weeds; Pest control; Crop Production/Industries; Q12.
Ano: 2005
URL: http://purl.umn.edu/24690

Potential of calcium silicate to mitigate water deficiency in maize
Provedor de dados: 53
Autores: Marques,Douglas José; Ferreira,Mozart Martins; Lobato,Allan Klynger da Silva; Freitas,Wellington Alves de; Carvalho,Jacinto de Assunção; Ferreira,Ewerton Dilelis; Broetto,Fernando.
ABSTRACT The aim of this study was to evaluate the potential of calcium silicate to mitigate the effects of water deficiency in maize plants yield. A completely randomized factorial design, consisting of five combinations of calcium silicate (0, 25, 50, 75, and 100%) and five different soil moisture levels (30, 70, 100, 130, and 160%), was adopted. The following parameters were evaluated: soil matric potential, xylem water potential, silicon concentration, leaf dry weight, and dry mass production. Matric potential monitoring confirmed that the irrigation depths employed resulted in different environments for maize plant development during the experiment. Confirming the hypothesis of the study, at the lower irrigation depths, the maize production has...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry matter; Irrigation; Silicon; Stress.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300275

Potential of corn production in southern Thailand
Provedor de dados: 106
Autores: Sujin Jinahyon.
Palavras-chave: Corn; Maize; Production; Southern; Thailand; ข้าวโพด; การผลิต; ยางพารา; ข้าว; ปาล์มน้ำมัน; มะม่วงหิมพานต์.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4000

Potential of East African phosphate rock deposits in integrated nutrient management strategies
Provedor de dados: 42
Autores: Jama,Bashir; Van Straaten,Peter.
Phosphorus deficiency affects around 80% of the acid soils of western Kenya, but fertilizer use is limited due to high prices. This paper explores the potential of local phosphate rocks (PR) as a remedy within the context on an integrated soil fertility management approach. A promising phosphate rock is Minjingu PR (MPR, Tanzania), a sedimentary/biogenic deposit which contains about 13% total P and 3% neutral ammonium citrate (NAC) soluble P. On-farm trials in P-deficient soils in western Kenya demonstrate MPR to be as effective as triple superphosphate (TSP, 20% P) at equal P rates. The benefits are most pronounced with the integration of agroforestry technologies that improve soil fertility. Besides Minjingu PR, Busumbu PR from Uganda (BPR) is...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilizers; Maize; Improved fallows; Tithonia; East Africa.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000400012

Potential of low-cost subsurface irrigation system in boosting food production in high water scarcity regions
Provedor de dados: 111
Autores: Babiker, Amir E.; Elnasikh, Maria, H.; Abd Elbasit, Mohamed A. M.; Abuali, Atif I.; Abu-Zerig, Majed M.; Liu, Gang.
Improvement of agricultural practices under limited water availability is a key solution for arid and semi-arid areas food shortage problems. Pressurized irrigation technologies have made great improvement in the field water use efficiencies; however, the construction cost of these systems was usually beyond the dryland small-farmer means. Low cost porous material was used for maize water supply under typical dry environment. Field experiments were conducted to evaluate the influence of subsurface irrigation systems made of locally produced clay pots and clay pipes on growth, yield and water use efficiency of maize (Zea mays L.) in the dryland of Sudan. Clay pots release point source water to the surrounding soil as emitters whereas clay pipes are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Subsurface Irrigation; Pitcher; Pipe; Water use efficiency; Dry lands.
Ano: 2021
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6813

Potential of Sorghum and Finger Millet to Enhance Household Food Security in Zimbabwe's Semi-arid Regions: A Review
Provedor de dados: 31
Autores: Mukarumbwa,   P.; Mushunje,   Abbyssinia.
Successive droughts, in Zimbabwe compounded by other economic shocks in recent years have resulted in decreased maize productivity amongst the communal farmers most of whom reside in regions IV and V which are considered semi-arid. This has given rise to the need to find alternative food crops, which may be suitable for these areas. Generally, research in the world indicates that sorghum and millet have the potential to end chronic food insecurity in semi-arid areas because of their drought tolerance. Whilst this might be the case, research, government policy and assistance from non-governmental organizations on food crop production in Zimbabwe have shown a continual inclination to maize production in semi-arid areas. However, maize is regarded as a high...
Tipo: Journal Article
Palavras-chave: Semi-arid; Sorghum; Finger millet; Small grains; Food security; Crop Production/Industries.
Ano: 2010
URL: http://purl.umn.edu/96430

Potential of the ESA23B maize population for protein and oil content improvement
Provedor de dados: 63
Autores: Mittelmann,Andréa; Miranda Filho,José Branco de; Lima,Gustavo Júlio Mello Monteiro de; Hara-Klein,Claudete; Tanaka,Ricardo Takao.
Among the traits that may add commercial value to maize (Zea mays L.), those related to nutritional quality, specially protein and oil content, are of great interest to the feed industry. The objective of this work was studying the variability of protein and oil content, as well as yield, in a group of maize testcrosses. One hundred and twenty S1 families of the ESA23B maize population were crossed with two testers, an open-pollinated population (BR108) and an exotic line (CML269). Testcrosses were evaluated at two locations under a completely randomized block design with three replications. Ear and grain yield, protein and oil content were evaluated. The three-way interaction location x tester x progeny was significant for all traits, except for oil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Breeding; Topcross; Nutritional quality; Grains.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200017

Potential of three microbial bio-effectors to promote maize growth and nutrient acquisition from alternative phosphorous fertilizers in contrasting soils
Provedor de dados: 21
Autores: Thonar, Cécile; Lekfeldt, Jonas D.S.; Cozzolino, Vincenza; Kundel, Domimika; Kulhánek, Martin; Mosimann, Carla; Neumann, Günter; Piccolo, Alessandro; Rex, Martin; Symanczik, Sarah; Walder, Florian; Weinmann, Markus; de Neegaard, Andreas; Mäder, Paul.
Background  Agricultural production is challenged by the limitation of non-renewable resources. Alternative fertilizers are promoted but they often have a lower availability of key macronutrients, especially phosphorus (P). Biological inoculants, the so-called bio-effectors (BEs), may be combined with these fertilizers to improve the nutrient use efficiency.  Methods  The goal of this study was to assess the potential of three BEs in combination with alternative fertilizers (e.g., composted manure, biogas digestate, green compost) to promote plant growth and nutrient uptake in soils typical for various European regions. Pot experiments were conducted in Czech Republic, Denmark, Germany, Italy, and Switzerland where the same variety of maize was grown in...
Tipo: Journal paper
Palavras-chave: Soil quality; Crop combinations and interactions; Composting and manuring.
Ano: 2017
URL: http://orgprints.org/31321/1/Thonar_et_al-2017-Chemical_and_Biological_Technologies_in_Agriculture.pdf

Potential of three microbial bio-effectors to promote maize growth and nutrient acquisition from alternative phosphorous fertilizers in contrasting soils
Provedor de dados: 21
Autores: Thonar, Cécile; Lekfeldt, Jonas D.S.; Cozzolino, Vincenza; Kundel, Domimika; Kulhánek, Martin; Mosimann, Carla; Neumann, Günter; Piccolo, Alessandro; Rex, Martin; Symanczik, Sarah; Walder, Florian; Weinmann, Markus; de Neergaard, Andreas; Mäder, Paul.
Background: Agricultural production is challenged by the limitation of non-renewable resources. Alternative fertilizers are promoted but they often have a lower availability of key macronutrients, especially phosphorus (P). Biological inoculants, the so-called bio-effectors (BEs), may be combined with these fertilizers to improve the nutrient use efficiency.    Methods: The goal of this study was to assess the potential of three BEs in combination with alternative fertilizers  (e.g., composted manure, biogas digestate, green compost) to promote plant growth and nutrient uptake in soils typical for various European regions. Pot experiments were conducted in Czech Republic, Denmark, Germany, Italy, and Switzerland where the same variety of maize was grown in...
Tipo: Journal paper
Palavras-chave: Composting and manuring; Nutrient turnover.
Ano: 2017
URL: http://orgprints.org/32920/1/Thonar2017-Potential%20of%20three%20microbial%20bio%E2%80%91effectors%20to%20promote%20maize%20growth%20and%20nutrient%20acquisition%20from%20alternative%20phosphorous%20fertilizers%20in%20contrasting%20soils.pdf

Potential of transgenic Bt-maize for management of Elasmopalpus lignosellus
Provedor de dados: 22
Autores: Vinha, Fernando Belezini; Silva, Bruna Fernanda Bueno da; Masson, Mauricio Bianchi; Pinto, Alexandre de Sene.
The Lepidoptera insects are responsible for large losses in maize production in Brazil, and stand out those that attack seedlings, such as lesser cornstalk borer, Elasmopalpus lignosellus (Zeller). The objective of this work was to compare the performance of transgenic Bt maize in the control of the E. lignosellus caterpillar in the maize seedlings phase in two trials. In the first trial six treatments were tested: (1) Conventional Non-Bt maize; (2) Conventional Non-Bt maize with insecticide application; (3) transgenic maize expressing the Cry1Ab genes; (4) Cry1F; (5) Cry1A.105 + Cry2Ab2; (6) Cry1A.105 + Cry2Ab2 + Cry1F. The experimental design was randomized blocks, where each treatment was repeated 4 times in plots of 22.5 m2. Ten consecutive plants with...
Tipo: Info:eu-repo/semantics/article
Ano: 2019
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/22394

Potential of twenty exotic germplasms to improve Brazilian maize architecture
Provedor de dados: 54
Autores: Neto,Amadeu Regitano; Nass,Luciano Lourenço; Miranda Filho,José Branco de.
Temperate and temperate x tropical germplasms were introduced into the maize breeding of the Department of Genetics (ESALQ-USP). Twenty populations designated as P-1 to P-20 and a check population were evaluated in a randomized complete block design with two replications at Piracicaba, SP, Brazil. Plots were 2.0 m long, spaced 1.0 m apart, with 10 plants per plot after thinning. The following traits were evaluated: PH, plant height; EH, ear height; TB, tassel branch number; KW, 100 kernels weight; EL, ear length; ED, ear diameter; KR, kernels per row, and RN, number of rows of kernels. The means of the exotic populations showed a variation in performance for all traits. The population means were greater than check means for KW, EL, and KR. Populations P-9,...
Tipo: Info:eu-repo/semantics/article
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000400022

Potentials to differentiate milk composition by different feeding strategies
Provedor de dados: 21
Autores: Slots, T.; Butler, G.; Leifert, C.; Kristensen, T.; Skibsted, L.H.; Nielsen, J.H.
To investigate the effect of the dietary intake of the cow on milk composition, bulk-tank milk was collected on 5 occasions from conventional (n = 15) and organic (n = 10) farms in Denmark and on 4 occasions from low-input nonorganic farms in the United Kingdom, along with management and production parameters. Production of milk based on feeding a high intake of cereals, pasture, and grass silage resulted in milk with a high concentration of α-linolenic acid (9.4 ± 0.2 mg/ kg of fatty acids), polyunsaturated fatty acids (3.66 ± 0.07 mg/kg of fatty acids), and natural stereoisomer of α-tocopherol (RRR-α-tocopherol, 18.6 ± 0.5 mg/kg of milk fat). A milk production system using a high proportion of maize silage, by-products, and commercial concentrate mix was...
Tipo: Journal paper
Palavras-chave: Food security; Food quality and human health Dairy cattle Feeding and growth.
Ano: 2009
URL: http://orgprints.org/16018/3/16018.pdf

Potenzial der Mid-Infrarot-Spektrometrie bei Kuhmilchproben  zur Abschätzung der Rationszusammensetzung
Provedor de dados: 21
Autores: Steinwidder, Andreas; Klaffenböck, M.; Fasching, C.; Terler, G.; Gruber, L.; Mészáros, Dóra; Sölkner, J.
Milk composition of dairy animals is influenced by the composition of the ration fed. The objective of this study was to determine if the percentages and absolute amounts  of hay, grass silage, pasture, maize silage and concentrate in the feed ration can be estimated using MIR spectrometry of milk. A total of 10200 milk samples from 90 dairy  cows were collected, and the intakes of all ration components were measured. Using partial least squares regression (PLS), equations were developed to estimate ration compositions corresponding to each milk sample. To evaluate accuracy, the correlation between observed and estimated values (R) and ratio to performance  (RPD) were used. Notable R values (for kg/for %) were observed for the ration proportion of pasture...
Tipo: Conference paper, poster, etc.
Palavras-chave: Dairy cattle; Feeding and growth.
Ano: 2017
URL: http://orgprints.org/31958/1/Potenzial%20der%20Mid-Infrarot-Spektrometrie%20bei.pdf

PRACTICAL CHALLENGES TO ESTIMATING THE BENEFITS OF AGRICULTURAL R&amp;D: THE CASE OF PLANT BREEDING RESEARCH
Provedor de dados: 31
Autores: Heisey,   Paul W.; Morris,   Michael L.
Interest in the economics of plant breeding first emerged during the late 1960s and early 1970s following the well-known green revolutions in wheat and rice.  Since that time, few branches of agricultural research have been subjected to as much scrutiny as plant breeding.  Impacts assessment studies consistently conclude that the economic benefits generated by successful plant breeding programs are large, positive, and widely distributed. Case studies repeatedly find that investment in crop genetic improvement generates attractive rates of return compared to alternative investment opportunities. Similarly, case studies consistently show that the welfare benefits resulting from the adoption of modern varieties (MVs) are broadly shared by producers and...
Tipo: Conference Paper or Presentation
Palavras-chave: Research and Development/Tech Change/Emerging Technologies.
Ano: 2002
URL: http://purl.umn.edu/19828

Practical plant nematology: A field and laboratory guide
Provedor de dados: 31
Autores: Coyne,   D.L.; Nicol,   J.M.; Claudius-Cole,   B.
Published by IITA (International Institute of Tropical Agriculture)
Tipo: Report
Palavras-chave: Crop Production/Industries.
Ano: 2007
URL: http://purl.umn.edu/56182

Pragas da cultura do milho em condições de campo: métodos de controle e manuseio de defensivos.
Provedor de dados: 14
Autores: CRUZ, I.; WAQUIL, J. M.; SANTOS, J. P.; VIANA, P. A.; SALGADO, L. O.
Descrição, biologia, importancia e identificacao das pragas no campo; Metodos de controle mais utilizados para as pragas do milho; Aspectos toxicologicos dos defensivos; Manuseio de defensivos; Manual de condutas nas intoxicacoes por inseticidas.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Pragas; Controle; Defensivos agricolas; Uso; Maize; Field; Control; Agricultural defensive; Use.; Campo; Milho; Zea Mays.; Corn; Pests.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/475356

Pre-breeding: a link between genetic resources and maize breeding
Provedor de dados: 63
Autores: Nass,Luciano Lourenço; Paterniani,Ernesto.
Activities related to genetic resources are characterized by high cost and long term return. Thus the conservation of genetic variability for the future and the efficient utilization of available accessions are two important goals to be attained. However, the low utilization of germplasm banks is not restricted to Brazil but to other developing countries as well. Therefore, pre-breeding is a promising alternative to link genetic resources and breeding programs. Several aspects for maize are discussed such as concept, importance, methods and results. Problems to be investigated and suggestions are also presented.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Zea mays; Pre-breeding; Genetic resources.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000300035

PRECISION AGRICULTURE: ECONOMICS OF NITROGEN MANAGEMENT IN CORN USING SITE-SPECIFIC CROP RESPONSE ESTIMATES FROM A SPATIAL REGRESSION MODEL
Provedor de dados: 31
Autores: Bongiovanni,   Rodolfo; Lowenberg-DeBoer,   James.
Adapting variable rate technology (VRT) to Argentine conditions requires methods that use inexpensive information and that focus on the inputs and variability common to Argentine maize and soybean growing areas.  The goal of this study is to determine if spatial regression analysis of yield monitor data can be used to estimate the site-specific crop Nitrogen (N) response needed to fine tune variable rate fertilizer strategies.  N has been chosen as the focus of this study because it is the most commonly used fertilizer by corn farmers in Argentina.  The methodology uses yield monitor data from on-farm trials to estimate site-specific crop response functions.  The design involves a strip trial with a uniform N rate along the strip and a randomized complete...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2001
URL: http://purl.umn.edu/20650

Predicted milk production per hectare based on yield and chemical composition of native and hybrid maize silage varieties on temperate and tropical regions
Provedor de dados: 109
Autores: Robles Jiménez,Lizbeth Esmeralda; González Ronquillo,Manuel; Rosas Davila,Melchor; Osorio Avalos,Jorge; Palacios Riocerezo,Carlos; Castelán Ortega,Octavio Alonso; Chay-Canul,Alfonso; Vargas-Bello-Pérez,Einar; Plata Reyes,Dalia A.
Abstract The objective of the present study was to characterize maize silage according to chemical composition, maize silage yield, as well as their predicted milk production. A search was made on studies related to maize silage yield, density, chemical composition (DM, CP, NDF, starch), and dry matter digestibility (DMD). In this study, 41 maize varieties from temperate regions and 101 maize varieties from tropical origin were analyzed. The net energy of lactation (NEL Mcal/kg DM), kilograms of milk per t of silage (kg of milk/t DM), and kilograms of milk per hectare of silage (kg of milk/ha) were determined. A cluster (CL) analysis was performed, and six CL of maize silage were obtained. The CL1 included digestibility for dry matter, crude protein,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Production systems; Dairy; Cows; Starch; Fiber; Conserved forage.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122021000200148

Predicting the Acceptance for High Beta-Carotene Maize:  An Ex-Ante Estimation Method
Provedor de dados: 31
Autores: Tothova,   Monika; Meyers,   William H.
This paper postulates a household decision model that takes into account the production consumption tradeoffs between traditional and biofortified seed. The objective is to understand the effect of these differing traits on the adoption decision when white maize is preferred by the consumers.
Tipo: Report
Palavras-chave: Agricultural and Food Policy; Consumer/Household Economics.
Ano: 2006
URL: http://purl.umn.edu/44835

Predicting the genetic gain in the Brazilian white maize landrace
Provedor de dados: 65
Autores: Souza,Ana Raquel Ribeiro e; Miranda,Glauco Vieira; Pereira,Messias Gonzaga; Souza,Leandro Vagno de.
The objectives of this research were to evaluate the genetic variability and predict genetic gain in the white maize landrace rescued in Barbacena, Minas Gerais, Brazil. The Brazilian maize landraces have economic and social importance for certain areas in Brazil, and research on this germplasm is very important for local food security. Three experiments were carried out with 100 half-sib progenies, in Campos dos Goytacazes, RJ, Coimbra and Barbacena, Minas Gerais, Brazil. These sites were chosen for their soil and climatic differences. An analysis of variance was significant among the progeny for all characters, indicating the presence of genetic variability between the three populations. In Campos dos Goytacazes and Coimbra, the genetic variation of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Selection; Rescue; Breeding.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782009000100004

Predicting the range of inbreeding depression of inbred lines in cross-pollinated populations
Provedor de dados: 54
The objectives of this paper were to derive the genetic variance of inbreeding depression (&lt;img SRC="Image482.gif" WIDTH="48" HEIGHT="33"&gt; ) and to predict the range of inbreeding depression (RID) in cross-pollinated populations. The variance of inbreeding depression is a function of the genetic variances related to dominance effects (&lt;img SRC="Image483.gif" WIDTH="31" HEIGHT="33"&gt;, D2, and &lt;img SRC="Image484.gif" WIDTH="21" HEIGHT="25"&gt;), and of the inbreeding coefficients of the two generations in which inbreeding depression is measured (Ft and Fg). The results showed that the higher the level of dominance of a trait, the higher the variance of inbreeding depression. The magnitudes of &lt;img SRC="Image485.gif" WIDTH="48"...
Tipo: Info:eu-repo/semantics/other
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84551997000100007

Prediction of apparent metabolizable energy and metabolizable energy corrected for nitrogen of corn according to physical classification of the grain
Provedor de dados: 96
Autores: Rodrigues,Sandra Iara Furtado Costa; Stringhini,José Henrique; Tanure,Candice Bergmann; Peripolli,Vanessa; Seixas,Luiza; McManus,Concepta.
ABSTRACT The objective of this study was to develop an equation to determine the apparent metabolizable energy (AME) and metabolizable energy corrected for nitrogen balance (AMEn) using a physical-based classification of corn. A total of 5,055 samples were taken from bulk cargo trucks, over a five-year period. The parameters studied were the variables related to the physical characteristics of grains. The density of maize was evaluated, and AME and AMEn were calculated. The average value for AME was 3,375 kcal/kg, and two groups were formed of high quality and low quality for all samples. Stepwise regression analysis was then carried out using grain quality to estimate AME and AMEn, and the validation of the equations was carried out with 6,490 independent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broilers; Metabolizability; Nutritional value.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100522

Prediction of hybrid means from a partial circulant diallel table using the ordinary least square and the mixed model methods
Provedor de dados: 74
Autores: Reis,Américo José dos Santos; Chaves,Lázaro José; Duarte,João Batista; Brasil,Edward Madureira.
By definition, the genetic effects obtained from a circulant diallel table are random. However, because of the methods of analysis, those effects have been considered as fixed. Two different statistical approaches were applied. One assumed the model to be fixed and obtained solutions through the ordinary least square (OLS) method. The other assumed a mixed model and estimated the fixed effects (BLUE) by generalized least squares (GLS) and the best linear unbiased predictor (BLUP) of the random effects. The goal of this study was to evaluate the consequences when considering these effects as fixed or random, using the coefficient of correlation between the responses of observed and non-observed hybrids. Crossings were made between S1 inbred lines from two...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diallel analysis; BLUP; Prediction; Cross-validation.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200023

Preference of Neoseiulus californicus (Acari: Phytoseiidae) for volatiles of Bt maize induced by multiple herbivory
Provedor de dados: 92
Autores: Botti,Jéssica Mayara Coffler; Franzin,Mayara Loss; Fadini,Marcos Antonio Matiello; Melo,Júlio Onésio Ferreira.
ABSTRACT Plant indirect induced defenses against herbivores are characterized by the production of plant volatiles that to attract natural enemies. The objective of this study was to evaluate whether the attack of the two-spotted spider mite Tetranychus urticae or the multiple herbivory of T. urticae together with the fall armyworm Spodoptera frugiperda are able to elicit indirect induced defense in conventional and Bt maize plants. The experiment was carried out in the laboratory using Y-tube olfactometer, evaluating the predatory mite Neoseiulus californicus olfactory preference for plant volatiles. The treatments involved: Clean Conventional Plant; Conventional Plant Infested with T. urticae; Clean Bt Plant; Bt Plant Infested with T. urticae;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Indirect induced defense; Tetranychus urticae; Secondary plant compounds; Plant resistance; Fall armyworm.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000400283

Preliminary report on chemical control of corn borer, Ostrinia furnacalis (Guenee)
Provedor de dados: 106
Autores: Auranuj Kongkanjana; Pisit Sepsawadi; Boonsom Meksongsee.
1 table
Palavras-chave: Corn; Maize; Corn borers; Ostrinia furnacalis; Chemical control; ข้าวโพด; หนอนเจาะลำต้น.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3907

Preliminary report on research to control aflatoxin in corn by chemicals
Provedor de dados: 106
Autores: Udom Pupipat; Thammasak Sommartya; Srisit Karunyawanit; Uma Suebsang; Pansak Pittipornchai; Chaiwat To-anan; Chamnan Chutkaew.
4 tables
Palavras-chave: Corn; Maize; Aflatoxins; Fungicides; Ethylene oxide; Myco Curb; Detoxicant; Eradicant; A. flavus; ข้าวโพด; อะฟลาทอกซิน; สารกำจัดเชื้อรา.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4581

Preliminary studies of physiology in corn production
Provedor de dados: 106
Autores: Pismai Srisukphrasert; Acharee Prasarn.
5 tables
Palavras-chave: Corn; Maize; Physiology; Growth; Varieties; Downy mildew; Disease resistance; Yields; ข้าวโพด; การผลิต; สรีรวิทยา; โรคราน้ำค้าง; ระยะปลูก; ความหนาแน่นของประชากร; การเจริญเติบโต; การพัฒนาของพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3922

Preparation and qualities of protein concentrates from corn gluten meal
Provedor de dados: 106
Autores: Sukoncheun Sringam; Jarunee Mongkolpanya.
7 tables
Palavras-chave: Corn; Maize; Corn gluten mean; Protein concentrate; ข้าวโพด; โปรตีนเข้มข้น; กลูเตน; การผลิต.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4376

Preparation of corn oil by prepress solvent extraction
Provedor de dados: 106
Autores: Sukoncheun Sringam; Sitima Jittinundana.
1 ill., 4 tables
Palavras-chave: Corn; Maize; Corn oil; Prepress solvent extraction; ข้าวโพด; น้ำมัน; การสกัด.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4377

Preparing and staining mycorrhizal structures in dry bean, sweet corn, and wheat using a block digester
Provedor de dados: 18
Autores: Tarkalson, David D.; Pendleton, Rosemary L.; Jolley, Von D.; Robbins, Charles W.; Terry, Richard E.
Tipo: Article
Palavras-chave: Bean / dry bean; Corn / maize; Small grain; Mass Import - autoclassified (may be erroneous).
Ano: 1998
URL: http://eprints.nwisrl.ars.usda.gov/696/1/965.pdf

Preparo do solo e adubação residual na cultura do milho em áreas irrigadas.
Provedor de dados: 14
Autores: CHOUDHURY, E. N.; MELLO, C. A. de O. e; MORGADO, L. B.
Diferentes metodos de preparo do solo foram testados quanto a producao e distribuicao do sistema radicular do milho, sob o efeito residual de fertilizantes.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Maize; Rooting system; Fertility.; Solo; Adubação; Irrigação; Manejo; Milho; Sistema Radicular; Zea Mays.; Irrigation; Soil.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131773

Present states of the diseases of corn in Indonesia
Provedor de dados: 106
Autores: Wendel, Ramond.
4 tables
Palavras-chave: Corn; Maize; Plant diseases; Downy mildew; Rusts; Smuts; Curvularia; Helminthosporium; Septoria; Physoderma; Leptosphaeria; Fusarium; Diplodia; Ustilago; Gibberella; Pythium; Sclerospora; Puccinia; Indonesia; ข้าวโพด; อินโดนีเซีย; โรคพืช; โรคราน้ำค้าง; โรคราสนิม; โรคราเขม่าดำ.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3736

Presentation at ISAE 2019 - Bergen, Norway
Provedor de dados: 21
Autores: Tahamtani, Fernanda; Berenjian, Atefeh; Gunnarsson, Stefan; Riber, Anja B.
The FreeBirds project aims to generate more insight into the relationship between organic chickens’ free-range use and bird health, welfare and performance, as well as soil nutrient load. One completed study of the project compared the range use, welfare and performance of Dekalb White (DW) and Bovans’ Brown (BB) laying hens on an experimental setting simulating organic on-farm conditions. Six hundred non-beak-trimmed hens of each hybrid (N = 1200) were housed in groups of 100, from 17 to 38 weeks of age, in 12 pens according to EU requirements for organic egg production. Indoor pens measured 4.5 × 4.5 m. Each pen provided 12 nest boxes and 18 cm/hen of elevated perch length. Wood shavings was provided as litter and the indoor net stocking density was 5.1...
Tipo: Conference paper, poster, etc.
Palavras-chave: Health and welfare.
Ano: 2019
URL: http://orgprints.org/36648/1/ISAE%202019%20-%20Freebirds.pdf

Pré-tratamento de hidratação-desidratação de sementes de milho como um meio de sobrepujar os efeitos da seca.
Provedor de dados: 14
Autores: AGUIAR, P. A. A.
Sementes de cinco cultivares de milho (Zea mays L.) Azteca, Centralmex, Dentado, Flint e Piranão - foram submetidas ao processo de hidratação-desidratação (hardening) antes do plantio e plantadas sob condições de campo do Trópico Semi-Árido do Brasil, por dois anos.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize.; Milho; Desidratação; Hidratação; Seca; Resistência; Semente.; Seeds.; Drought; Corn.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/155911

Pretreatment with H2O2 in maize seeds: effects on germination and seedling acclimation to salt stress
Provedor de dados: 61
Autores: Gondim,Franklin A; Gomes-Filho,Enéas; Lacerda,Claudivan F; Prisco,José Tarquinio; Azevedo Neto,André D; Marques,Elton C.
The aim of this study was to evaluate the effects of H2O2 on germination and acclimation of maize plants subject to salt stress. Three experiments using BRS3003 seeds, a triple hybrid of maize, were carried out in a growth room and in greenhouse. In the first experiment, H2O2 accelerated the germination percentage of seeds at 100 mM, but not at 500 mM. In the second experiment, the pretreatment of seeds was observed to induce a pronounced increase in ascorbate peroxidase (APX) and catalase (CAT) enzyme activity after 30 h of soaking in H2O2. It was also observed that guaiacol peroxidase (GPX) activity was smaller in the seeds soaked in H2O2 for 12, 24, 30, 36 and 42 h, in relation to those soaked in distilled water. The superoxide dismutase (SOD) activity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant enzymes; Hydrogen peroxide; Oxidative stress; Salinity stress; Zea mays.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202010000200004

Price asymmetry in South African futures markets for agricultural commodities
Provedor de dados: 31
Autores: Mashamaite,   P.; Moholwa,   B.
This paper tests the existence of price asymmetry in South African futures markets for white and yellow maize, wheat and sunflower seeds using a dynamic price asymmetry model. The sum of coefficients test and the speed of adjustment test are used to determine whether or not prices move up in the same fashion as they move down, over daily and weekly data frequencies. Out of the four commodity futures markets studied over varying data frequencies, only daily wheat is price asymmetric. Wheat daily prices respond faster to price decreases than to price increases. The implication of the results is that past prices do affect current prices and contain information. Hence, the weak-form efficient market hypothesis appears to be contradicted for wheat futures...
Tipo: Journal Article
Palavras-chave: Industrial Organization.
Ano: 2005
URL: http://purl.umn.edu/31722

Price Volatility, Speculation and Excessive Speculation in Commodity Markets: sheep or shepherd behaviour?
Provedor de dados: 31
Autores: Algieri,   Bernardina.
The present study aims to investigate the dynamics of primary commodity prices and the role of speculation over time. In particular the relationship between speculation and price volatility on the one side, and the linkage between excessive speculation and price volatility on the other side, is carefully examined with the scope to establish whether volatility drives speculation or speculation drives price volatility, or whether there are no linkages between the two variables. In order to identify the presence of any lead-lag relationships, two batteries of Granger causality tests are carried out for the period 1995-2012. The investigation complements a preliminary index analysis on speculation and excessive speculation in the commodity market. Unlike...
Tipo: Working Paper
Palavras-chave: Price volatility; Excessive speculation; Granger analysis; Agricultural Finance; Financial Economics; Food Consumption/Nutrition/Food Safety.
Ano: 2012
URL: http://purl.umn.edu/124390

Primary leaf growth and coleoptile length in maize seedlings
Provedor de dados: 1
Autores: Lopes, Camila Aparecida; Carvalho, Maria Laene Moreira de; Vasconcelos, Michelle Conceição; Ribeiro, Ana Maria Pereira; Santos, Heloísa Oliveira dos.
Evaluation of the physiological potential of maize seeds during the certification process is performed by a germination test. However, some tests show a delay in the growth of aerial seedling organs that does not reflect seed lot behavior in the field. This study aims to investigate the effects of genotype, water, light and temperature on differential primary leaf growth compared to coleoptile length in maize seedlings. Seeds from two simple hybrids and their reciprocal crosses that showed slow primary leaf growth were evaluated according to physiological quality, morphology, histochemistry, and enzymatic expression. There were differences among maize genotypes regarding initial primary leaf growth when compared to the coleoptile, especially when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ciências agrárias; Agronomia; Fitotecnia ea mays L.; Germination test; Lignin; Enzymes. Qualidade de sementes.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35366

Primary leaf growth and coleoptile length in maize seedlings
Provedor de dados: 1
Autores: Lopes, Camila Aparecida; Carvalho, Maria Laene Moreira de; Vasconcelos, Michelle Conceição; Ribeiro, Ana Maria Pereira; Santos, Heloísa Oliveira dos.
Evaluation of the physiological potential of maize seeds during the certification process is performed by a germination test. However, some tests show a delay in the growth of aerial seedling organs that does not reflect seed lot behavior in the field. This study aims to investigate the effects of genotype, water, light and temperature on differential primary leaf growth compared to coleoptile length in maize seedlings. Seeds from two simple hybrids and their reciprocal crosses that showed slow primary leaf growth were evaluated according to physiological quality, morphology, histochemistry, and enzymatic expression. There were differences among maize genotypes regarding initial primary leaf growth when compared to the coleoptile, especially when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ea mays L.; Germination test; Lignin; Enzymes.; Qualidade de sementes.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35366

Primeiros resultados de milho e caupi cultivados em uma área de mata secundária com e sem emprego de fogo.
Provedor de dados: 14
Autores: STOLBERG-WERNIGERODE, A. G. zu.
bitstream/item/57595/1/CPATU-ComTec53.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Caupi; Mata secundária; Maize; Cowpea; Cultural practices; Secondary forest.; Milho; Pratica Cultural; Queimada; Vigna Unguiculata; Zea Mays.; Burning.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382298

Principais doenças na cultura do milho.
Provedor de dados: 14
Autores: FERNANDES, F. T.; OLIVEIRA, E. de.
Doencas foliares; Podridoes do colmo e das raizes; Doencas das espigas; Doencas causadas por mollicutes e por virus; Outras doencas na cultura do milho.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize; Disease.; Doença; Milho; Zea Mays.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478849

Principais doenças na cultura do milho.
Provedor de dados: 14
Autores: FERNANDES, F. T.; OLIVEIRA, E. de.
Doencas foliares; Podridoes do colmo e das raizes; Doencas das espigas; Doencas causadas por mollicutes e por virus; Outras doencas na cultura do milho.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Maize; Disease.; Doença; Milho; Zea Mays.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/861158

Problems confronting grain storage
Provedor de dados: 106
Autores: Slibeck, Howard.
2 tables
Palavras-chave: Corn; Maize; Grain storage; Mold damage; Heat damage; Moisture content; Storage life; Quality; ข้าวโพด; การเก็บรักษา; ความเสียหายจากเชื้อรา; ความเสียหายจากความร้อน; การลดความชื้น; ความชื้นภายในเมล็ด.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3948

Problems on fertilizer consumption for corn, sorghum and other field crops
Provedor de dados: 106
Autores: Prajuab Burparatana.
3 tables
Palavras-chave: Corn; Maize; Sorghum; Fertilizers; Consumption; Fertilizer industry; ข้าวโพด; ข้าวฟ่าง; ปุ๋ยเคมี; อุตสาหกรรมปุ๋ย.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3976

Proceedings of the Fifth Regional Groundnut Workshop for Southern Africa
Provedor de dados: 30
Autores: R.C.N., ( R.C. Nageswara Rao ).
Palavras-chave: Groundnuts; Genotypes; Intercropping; Sole cropping; Pigeonpeas; Sowing date; Drought stress; Weather hazards; Maize.
Ano: 1992
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4098

Proceedings of the Fifth Regional Groundnut Workshop for Southern Africa
Provedor de dados: 30
Autores: R.C.N.
Palavras-chave: Groundnuts; Genotypes; Intercropping; Sole cropping; Pigeonpeas; Sowing date; Drought stress; Weather hazards; Maize.
Ano: 1992
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4168

Produção de biomassa, composição química e atributos químicos do solo do consórcio milho-leguminosas forrageiras na comunidade Boqueirão, Sobral-CE.
Provedor de dados: 14
Autores: POMPEU, R. C. F. F.; SOUZA, H. A. de; FARIAS, J. L. de S.; BEZERRA, J. W. T.; FERNANDES, F. E. P.; PEREIRA, P. L.; ARAUJO, M. R. A. de; RIELLA, J.
Objetivou-se avaliar a produção de biomassa, composição química e os atributos químicos do solo do consórcio milho-leguminosas forrageiras numa comunidade do município de Sobral, CE. Foram avaliados os consórcios milho-cunhã e milho-crotalária num delineamento de blocos completos casualizados, com quatro repetições. As parcelas experimentais foram constituídas de seis fileiras, com 5 m de comprimento, espaçadas entre si de um metro entre milho. O plantio do milho foi realizado no dia 01 de março de 2019, enquanto que o plantio das leguminosas foi realizado no dia 14 de março de 2019. Foram observadas diferenças de teores de matéria seca entre os consórcios cunhã-milho e crotalária-milho. Observou-se que a produção do consórcio crotalária-milho foi superior...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Feed crops; Nutrient cycling; Semiárido; Brasil; Região Nordeste; Leguminosa Forrageira; Cunha; Cobertura Morta; Volumosos; Alimento Para Animal; Forage production; Forage crops; Mulching; Biomass production; Intercropping; Brazil; Semiarid soils.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1117068

Produção de biomassa seca e teor de nutrientes do milho em resposta a doses e localização de osmocote em amostras de latossolo vermelho-escuro e areia quartzosa
Provedor de dados: 1
Autores: Braccini, Maria do Carmo Lana; UFV; Braccini, Alessandro de Lucca e; UEM; Foloni, José Marcos; UFV; Silva, José Ribamar Torres da; UFV.
Foi conduzido um experimento, em casa de vegetação, com o objetivo de avaliar o efeito de três fontes de NPK: osmocote (18-6-12), NPK sólido e NPK líquido, bem como comparar o comportamento do osmocote quanto à liberação de nutrientes em dois solos de texturas diferentes e avaliar a produção de biomassa seca e teores de nutrientes em resposta a diferentes doses e localizações de osmocote. O arranjo dos tratamentos foi obtido pela matriz baconiana e consistiu das combinações de doses, fontes e localizações dos adubos nos solos latossolo vermelho-escuro e areia quartzosa. Após quarenta dias de cultivo avaliaram-se a produção de biomassa seca de plantas de milho, teores e conteúdos de N, P e K e os teores de P e K no solo. Observaram-se maiores teores de P e...
Palavras-chave: 5.01.00.00-9    Agronomia milho; Osmocote; Fertilizante; Solos 5.01.00.00-9    Agronomia.
Ano: 1999
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4297

Produção de matéria seca e propriedades físicas do solo na consorciação milho e braquiária
Provedor de dados: 22
Autores: Seidel, Edleusa Pereira; Mattias, Vinicius; Mattei, Eloisa; Corbari, Fabio.
The experiment was conducted in the agricultural year 2010/2011, at São Salvador farm, located in the City of Toledo / PR. The present work was conducted with objective of evaluate the effect of corn-Brachiaria (Brachiaria ruzizienses) intercropping in dry matter production for maintenance of no-tillage system, as well as the physical properties of the soil. The experimental design was randomized blocks. The Treatments consisted of two corn cropping systems: single corn and corn associated with Brachiaria ruziziensis, with ten repetitions. Each plot had an area of one hundred square meters. Was determined the dry matter production using a metallic square with an area that was known alternately disposed in the row and between rows of corn, and all the dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Integração lavoura-pecuária; Matéria orgânica; Densidade do solo; Porosidade do solo; Resistência à penetração.
Ano: 2015
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/8226

Produção de sementes de culturas alimentares na região da SADC
Provedor de dados: 31
Criado para tratar os temas que limitam o acesso de fazendeiros em pequena escala, na África sub-Saara, para que possuam recursos para obterem colheitas de sementes de qualidade, das quais eles dependem para a obtenção dos alimentos e é o seu próprio meio de vida. Esta coleção de artigos descreve os princípios bem sucedidos para as experiências em comunidades que possuem produções de sementes. Entre outras coisas, os textos analisarão o sistema de produção normal de sementes e seus modelos, proporão caminhos para criar esquemas bem sucedidos para as comunidades que produzam sementes, descreverão as práticas próprias da produção de sementes para cereais seletos, plantas vegetativamente propagadas e outras colheitas, e esquematizarão as práticas básicas de...
Tipo: Report
Palavras-chave: Produção de sementes; Proteção dos alimentos; Qualidade; Propagação de plantas; Colheitas; Modelos; Fazendeiros; Alianças; Pequenas fazendas; Administração de negócios; África do Sul; Crop Production/Industries; F03.
Ano: 2004
URL: http://purl.umn.edu/56187

Produção e Comercialização de Culturas Alimentares: Que Expectativas para o Presente Ano? O Ponto de Vista dos Comerciantes Rurais de Pequena Escala no Norte e Centro de Moçambique.
Provedor de dados: 31
Autores: Weber,   Michael T.
Resultados das Investigações do SIMA-Dest e Departamento de Análise de Políticas MADER-Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Crop Production/Industries; Q18.
Ano: 2002
URL: http://purl.umn.edu/55234

Produção e utilização de silagem de milho e sorgo.
Provedor de dados: 14
Autores: OLIVEIRA, J. S. e.
Cultivares de milho e sorgo para ensilagem; Tecnicas de ensilagem; Ponto de colheita; Picagem do material; Compactacao do material no silo; Vedacao do material ensilado; Tempo minimo para abertura do silo; Retirada da silagem; Fases do processo fermentativo; Fase aerobia; Fase anaerobia I; Fase anaerobia II; Fase de estabilidade; Fermentacoes apos a abertura do silo; Uso de aditivos na silagem de milho e sorgo; Avaliacao de silagens de milho e sorgo; Avaliacao inicial; Analise da silagem; Coleta e manuseio das amostras; O que analisar; Materia Seca (MS); Fibra detergente acido (FDA); Fibra detergente neutro (FDN); Proteina bruta (PB); Utilizacao de silagens de milho e sorgo em dietas para bovinos.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Alimentacao animal; Food; Maize; Production; Silagem de milho; Silagem de sorgo; Sillage; Sorghum; Use; Uses; Uso; Utilizacao.; Alimento Para Animal; Alimentação; Animal; Ensilagem; Fermentação Anaeróbica; Milho; Nutrição Animal; Produção; Silagem; Sorghum spp; Sorgo; Zea Mays.; Animal feeding; Animal nutrition; Silage making.; Silage.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/957981

Producción de maíz (Zea mays L.) en el estado de Puebla: Un enfoque de equilibrio espacial para identificar las zonas productoras más competitivas.
Provedor de dados: 32
Autores: Flores Cruz, Luis Alberto.
La focalización de recursos por parte del Gobierno para apoyar la producción de maíz en aquellas zonas con alto potencial productivo requiere la identificación de las zonas más competitivas. Para  determinar las zonas productoras de maíz (Zea Mays L.) más competitivas en el Estado de Puebla se formuló y se obtuvo la solución de un modelo de equilibrio espacial e inter-temporal que considera la demanda, la oferta, la distribución de la producción e importaciones, y el abasto del consumo en cada zona consumidora. El modelo usó datos del año promedio 2008-2010 y se obtuvieron cuatro soluciones que corresponden al año base, y a reducciones graduales en la disponibilidad de maíz para consumo proveniente de una disminución en las importaciones estatales. Los...
Palavras-chave: Zea mays; Programación lineal; Oferta; Consumo; Linear programming; Supply; Consumption; Import; Economía; Maestría; Importación.
Ano: 2013
URL: http://hdl.handle.net/10521/1846

Producción de un biofertilizante a partir de HMA para el cultivo de maíz en suelos de sabana.
Provedor de dados: 32
Autores: Osorio Miranda, Mateo.
El presente trabajo se realizó con el objetivo de seleccionar un consorcio de hongos micorrícicos arbusculares (HMA) para producir un biofertilizante destinado al maíz cultivado en suelos de sabana. En un estudio previo se caracterizaron y clasificaron taxonómicamente HMA asociados al maíz en suelos de sabana en Tabasco. A partir de estas cepas se obtuvieron cinco consorcios que fueron evaluados en el presente estudio mediante la prueba del Número más Probable de Propágulos, seleccionando los tres consorcios más efectivos. Estos fueron propagados en diferentes sustratos para determinar el más adecuado para formular el biofertilizante. Los sustratos ensayados fueron: Cachaza Composteada y suelos Fluvisol y Acrisol, estériles y no estériles, en un diseño de...
Palavras-chave: HMA; Maíz; Inoculantes; Consorcios; Biofertilizante; Rendimiento; AMF; Maize; Inoculants; Consortia; Biofertilizers; Yield corn; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/575

Producción de un biofertilizante a partir de HMA para el cultivo de maíz en suelos de sabana.
Provedor de dados: 32
Autores: Osorio Miranda, Mateo.
El presente trabajo se realizó con el objetivo de seleccionar un consorcio de hongos micorrícicos arbusculares (HMA) para producir un biofertilizante destinado al maíz cultivado en suelos de sabana. En un estudio previo se caracterizaron y clasificaron taxonómicamente HMA asociados al maíz en suelos de sabana en Tabasco. A partir de estas cepas se obtuvieron cinco consorcios que fueron evaluados en el presente estudio mediante la prueba del Número más Probable de Propágulos, seleccionando los tres consorcios más efectivos. Estos fueron propagados en diferentes sustratos para determinar el más adecuado para formular el biofertilizante. Los sustratos ensayados fueron: Cachaza Composteada y suelos Fluvisol y Acrisol, estériles y no estériles, en un diseño de...
Palavras-chave: HMA; Maíz; Inoculantes; Consorcios; Biofertilizante; Rendimiento; AMF; Maize; Inoculants; Consortia; Biofertilizers; Yield corn; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/575

Producción, valor nutricional y aprovechamiento del rastrojo de maíces nativos en la región de Libres-Serdán, Puebla, México.
Provedor de dados: 32
Autores: Múñoz Tlahuiz, Faviola.
En los Valles Altos de Puebla, el rastrojo es un subproducto del cultivo de maíz importante para las unidades de producción agropecuaria en condiciones de temporal. Por tal motivo, el objetivo fue evaluar la producción y calidad del rastrojo de variedades locales de maíz, conocer el aprovechamiento de éste y las necesidades de investigación en la región del Valle de Libres-Serdán, Puebla. Se colectó semilla de variedades de maíces nativos en dos transectos del estado de Puebla y parte de Tlaxcala denominados Libres-Mazapiltepec-Huamantla (L-M-H) y Serdán-Tlachichuca-Guadalupe Victoria (S-T-GV). Para cada transecto, en dos localidades bajo un diseño látice simple 12x12 con dos repeticiones, se evaluaron 144 variedades incluyendo cuatro testigos comerciales....
Palavras-chave: Maíz criollo; Variedades de doble propósito; Digestibilidad; Producción de maíz en temporal; Creole maize; Dual-purpose varieties; Digestibility; Rainfed maize production; EDAR; Estrategias para el Desarrollo Agrícola Regional; Maestría.
Ano: 2011
URL: http://hdl.handle.net/10521/602

Producers and Consumer attitudes toward Biotechnology in Ghana
Provedor de dados: 31
Autores: Nsafoah,   Annie; Dicks,   Michael R.; Osei,   Collins.
Over 265 million people in Sub-Saharan Africa face malnutrition, chronic hunger, and poverty. One of the technologies that could help alleviate the perpetuating cycle of chronic hunger is biotechnology. Genetic modification (GM) has the potential to enhance agricultural productivity and improve Africa’s food security, but little is known about the potential benefits and costs of using genetically modified maize in Africa - Ghana.  African and Ghanaian policy makers, farmers, and consumers often have difficulty accepting new technologies. Their reluctance is due to the investment required for new technology, - aversion to risk, the changes required to traditional production practices, and incomplete- knowledge of new technologies. This study elicits the...
Tipo: Conference Paper or Presentation
Palavras-chave: Producers and Consumer attitudes toward Biotechnology in Ghana; Agricultural and Food Policy; International Development; International Relations/Trade.
Ano: 2011
URL: http://purl.umn.edu/98642

Producing no-till cereal or corn following alfalfa on furrow-irrigated land
Provedor de dados: 18
Autores: Carter, D.L.; Berg, R.D.; Sanders, B.J.
Tipo: Article
Palavras-chave: Alfalfa; Corn / maize; Small grain; Tillage; Mass Import - autoclassified (may be erroneous).
Ano: 1991
URL: http://eprints.nwisrl.ars.usda.gov/552/1/738.pdf

Production and characterization of amylases from Zea mays malt
Provedor de dados: 52
Autores: Biazus,Joana Paula Menezes; Souza,Roberto Rodrigues de; Márquez,Jesus Espinoza; Franco,Telma Teixeira; Santana,José Carlos Curvelo; Tambourgi,Elias Basile.
In this work the α and β-amylase enzymes were obtained from maize (Zea mays) malt and were biochemistry characterized. A germination study to obtain the maize malt with good amylase activity was made. The maize seeds were germinated in laboratory and the enzymatic activity was measured daily. Activity dependence to germination time were fitted to an exponential model (A=A0eµt), which showed that the behaviour of enzymatic activity in the germination process was similar to the growth of the microorganism. Its model could be applied to describe the mechanism of α-amylase production for each maize varieties and others cereals. Maize malt characterization showed that α and β-amylase had optimal pH between 4-6.5, optimal temperature 50 and 90ºC, and molecular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize seed; Malting; Α and β-amylase; Biochemistry characterization; Germination model.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400024

Production and Quality Evaluation of a Fermented Drink obtained from Maize Meal using Kefir Grains and Yoghurt Starter Cultures (Lactobacillus bulgaricus and Streptococcus thermophilus)
Provedor de dados: 111
Autores: Masehlele, Dipuo Patricia; Adebiyi, Janet Adeyinka; Kewuyemi, Yusuf Olamide; Adebo, Oluwafemi Ayodeji.
Times have changed to a point that each day people have planned agendas to cover for the day. This has led to less time spent in preparing healthy and nutritious foods. The food industry has evolved to try and cater for the busy lifestyle with healthy food such as ready to drink fermented products from common substrate (e.g. cereals) using starter cultures such as kefir grains and lactic acid bacteria (LAB) to facilitate fermentation. This study aimed to develop a drink with maize meal using kefir grains and a combination of lactic acid bacteria (LAB) (Lactobacillus bulgaricus and Streptococcus thermophilus) as starter cultures. Physicochemical properties, biochemical composition, antioxidant activity and consumer acceptance of the products were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Maize; Kefir; Yoghurt culture; Fermented drinks.
Ano: 2023
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7161

Production and utilization of corn starch
Provedor de dados: 106
Autores: Sukoncheun Sringam; Rasamee Supasri.
3 ill., 5 tables
Palavras-chave: Corn; Maize; Starch; Production; Utilization; ข้าวโพด; การผลิต; การใช้ประโยชน์; แป้งข้าวโพด.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4607

Production, characterization and modelling of glucose syrup production process from selected agricultural crops
Provedor de dados: 111
Autores: FAKAYODE, OLUGBENGA ABIOLA; PETER, EDIDIONG ETIM; OJOAWO, OLAYEMI OLUBUNMI.
Production, characterization and development of models for glucose syrup obtained from selected agricultural crops were studied. Glucose syrups were produced at 60, 80 and 100oC. The rheological properties of the glucose syrups were investigated and the effect of temperature on viscosity was determined. Also, the effect of shear rate on viscosity was determined at spindle speeds of 10, 20, 50 and 100 rpm. Data obtained were fitted into Power law model for analyzing the viscosity and for fluid classification. The starch yields were 71.7, 85.3 and 91.5% and the syrup yields were 78.82, 86.35 and 88.65% for maize, rice and cassava respectively. Viscosities of the syrups showed an inverse relationship with temperature and shear rates. The power law index (n)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering Glucose; Power Law Model; Viscosity; Pseudo-plastic; Non-Newtonian fluid.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5150

Production, decomposition of residues and yield of maize and soybeans grown on cover crops
Provedor de dados: 124
Autores: Torres,José Luiz Rodrigues; Pereira,Marcos Gervasio; Rodrigues Junior,Dilson José; Loss,Arcângelo.
ABSTRACTThe residues of cover plants and crops left on the soil surface can influence decomposition, nutrient cycling and follow crop yield. The objective was to evaluate the production of dry biomass (BD), of residues decomposition rate and yield of maize and soybean grown on different soil covers. The experimental design was a randomized block scheme banded, with four covers: Brachiaria, sun hemp, pearl millet and fallow period in autumn/winter, with maize and soybean crop in the spring/summer. We evaluated BD, decomposition through bags of decomposition and yield of maize and soybeans. Pearl millet and sunhemp were the covers which produced more of BD in the fall/winter period. the rate of decomposition of plant residues in maize and soybeans is slow in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intercropping; No-tillage; Productivity; Cerrado.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000300451

Production Flexibility in Extensive Beef Farming Systems
Provedor de dados: 7
The aim of this work is to assess the flexibility of production allowed by extensive production conditions faced with variations in the environment, i.e., market variations and climatic fluctuations, of Limousin beef systems. The study used a case-based methodology in which seven beef farms with less than 1 LU/ha were chosen. Data collection was based on three interviews using a semistructured questionnaire and on the analysis of productive and economic results over a 15-year period (1991-2005). The main evolution of these farms is related to a rise in work productivity associated with an increase in herd size. Herd increase was made possible by enlarging the area, the margin of intensification being limited in these regions. To take advantage of the...
Tipo: Peer-Reviewed Insight
Palavras-chave: Extensive farming system; Livestock production system; Mix flexibility; Process flexibility.
Ano: 2011

Production Incentives for Small Scale Farmers in Zimbabwe: The Case of Cotton and Maize
Provedor de dados: 31
Autores: Townsend,   Rob F.; Thirtle,   Colin G.
The paper presents an empirical investigation of the production response of small scale producers of maize and cotton for communal agriculture in Zimbabwe. The error correction model, which employs the concept of cointegration to avoid spurious regressions, is used in the analysis. The factors affecting maize output were the price of maize relative to seed, the number of marketing depots established in the communal areas and the number of loans provided to these farmers. The factors affecting cotton output were the increase in communal lands due to the resettlement program, the number of loans extended to small scale farmers and the price of cotton relative to seed. The weather played the most significant role in determining the quantity of maize sold.
Tipo: Journal Article
Palavras-chave: Agricultural and Food Policy; Crop Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/54441

Production of forage species producing grains and chemical composition of their silage
Provedor de dados: 22
Autores: Bezerra, Leilson Rocha; Silva, Eranildo Brasil da; Carneiro, Maria Socorro de Souza; Edvan, Ricardo Loila; Coutinho, Maria Janiele; Pereira, Elzânia Sales.
This study was conducted with the object of evaluate forage species that produce grains and chemical composition of their silages under the conditions of the Brazilian Northeast. They were evaluated four forages: maize, millet, sorghum and sunflower. It was determined the dry dead forage mass (DDFM), total dry mass of grain (TDMG), total dry mass of leaf (TDML) and total dry mass of stem (TDMS). Silage produced with the species was rated to the ammonia nitrogen, losses gases (G), losses effluent (E), dry matter yield (DMY), dry matter (DM), crude protein (CP), ether extract (EE), mineral matter (MM), neutral detergent fiber (NDF) and acid detergent fiber (ADF). Sorghum showed higher (p&lt;0.05) accumulation of DDFM, TDMG and TDMS than maize, millet and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus; Pennisetum glaucum; Sorghum bicolor; Zea mays.
Ano: 2016
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/12968

Production of haploid plants from ten hybrids of bread wheat (Triticum aestivum L.) through wide hybridization with maize (Zea mays L.)
Provedor de dados: 114
Autores: Torres,L.E.; Bima,P.; Maich,R.; Badiali,O.J.J.; Nisi,J.
The aim of this work was to obtain haploid plants of bread wheat through wide hybridization with maize. The experimental material included ten bread wheat hybrids (female parent) and one population of maize (pollen donor). Two assays were carried out in two different seasons (summer and winter). Wheat spikes were manually emasculated, each spike was pollinated twice with fresh pollen of maize and a solution of 2,4-D (100 mg l-1) was sprayed on pollinated florets and injected in the upper internode. Fifteen and 21 days after pollination caryopses were removed and surface sterilized. Embryos were cultured in tubes containing B5 medium. The ten hybrid combinations produced caryopses, but only eight of these hybrids produced embryos and, in six of them, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bread wheat; Haploid plants; Wide hybridization; Maize pollen.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2010000200003

Production of zearalenone by Fusarium spp. in maize kernel
Provedor de dados: 106
Autores: Chintana Chana; Pranee Hamelink; Chiradej Chamswarng; Ronnapop Bunjoedchoedchu.
2 tables
Palavras-chave: Corn; Maize; Fungi; Fusarium spp.; Toxin; Zearalenone; ข้าวโพด; การสร้างเซียราลีโนน; ฟูซาเรียม.
Ano: 1989
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4369

Production technology and quality of corn silage for feeding dairy cattle in Southern Brazil
Provedor de dados: 96
Autores: Silva,Mábio Silvan José da; Jobim,Clóves Cabreira; Poppi,Edson Carlos; Tres,Tamara Tais; Osmari,Milene Puntel.
ABSTRACTThe objective of this study was to evaluate the production practices and use of corn silage in dairy farms in Southern Brazil, and to evaluate their impact on the nutritional quality and occurrence of mycotoxins. The data were collected by application of questionnaires among the producers, and by analysis of silage samples. The variables were subjected to factorial analysis of data reduction through the principal components method, thus obtaining 84.12% of the variance associated with the location, corn hybrid, crop production management, and inoculant used, characterizing the farms into four distinct groups. In farms from Paraná, the silage production technologies were more associated with implantation and crop management processes, and investment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clustering; Inoculant; Maize; Mycotoxins; Silage production.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000900303

Productive characteristics of maize hybrids at different cutting heights for silage and organic matter and mineral rates in post-harvest residues - doi: 10.4025/actascianimsci.v35i2.16642
Provedor de dados: 2
Autores: Jobim, Clóves Cabreira; Universidade Estadual de Maringá; Oliveira, Fabio Cortez Leite de; Universidade Estadual de Maringá; Bumbieris Junior, Valter Harrys; Universidade Estadual de Londrina; Silva, Michele Simili da; Universidade Estadual de Londrina.
Current trial evaluated yield, organic matter and mineral composition of the residual harvest of five maize hybrids at three cutting heights (15, 35 and 55 cm). The experimental design consisted of a randomized block split plot with three replications. Concentrations of N, P, K, Ca, MS, MM and MO in the samples were evaluated. No difference among hybrids occurred in stem diameter (22.4 mm), ear production (8.0 ton DM ha-1), grain harvest index (37.3%) and total forage yield (15.0 ton DM ha-1). Hybrid effect occurred for variables of mineral composition of harvest residues. With the exception of calcium, a rise in cutting height from 15 to 55 cm failed to increase the concentration of minerals in the residue. The amount of organic matter and mineral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.04.04.01-6 nutrients; Recycling; Corn silage.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16642

Productividad de grano y semilla de híbridos trilineales, cruzas simples adroestériles y fértiles de maíz.
Provedor de dados: 32
Autores: Canales Islas, Enrique Inoscencio.
En los programas de mejoramiento genético de maíz (Zea mays L.) y de generación de híbridos de la Facultad de Estudios Superiores Cuautitlán (FESC-UNAM) y del Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP-CEVAMEX), se emplean la esterilidad masculina y la incorporación de este carácter, en las líneas élites como una alternativa para facilitar la producción de semillas, favorecer el mantenimiento de la calidad genética, y disminuir costos de producción de semilla, al liberarse comercialmente para su uso extensivo y abastecimiento de semilla de nuevos híbridos. En estos programas, desde 1992, se trabaja con androesterilidad, contándose con híbridos trilíneales, para productores de maíz de los Valles Altos de México (2200 a...
Palavras-chave: Zea mays L.; Androesterilidad; Densidad de población; Producción de semillas; Híbridos de maíz; Proporciones de semilla; Parámetros de estabilidad; AMMI; Rendimiento; Male sterility; Plant density; Seed production; Maize hybrids; Seed ratios; Parameters of stability; Yield; Genética; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2312

Productividad y valor económico potencial de arvenses en cultivos de maíz de Nanacamilpa, Tlaxcala
Provedor de dados: 32
Autores: González Amaro, Rosa María.
El presente trabajo se desarrolló para conocer el uso, manejo y productividad  expresada en costos y beneficios del aprovechamiento de las arvenses de cultivo  de maíz en un sistema agrícola tradicional. Se muestrearon 12 parcelas en tres  comunidades de Nanacamilpa de Mariano Arista, Tlaxcala. En cuatro parcelas de  cada comunidad se establecieron áreas de muestreo de 7 x 7.5 m, considerando  bordo, orilla y cultivo, en las que se identificaron las especies silvestres útiles, su  riqueza, diversidad y cobertura estimada empleando la escala modificada de la  original de Braun-Blanquet. Dentro de esta unidad de muestreo se establecieron  seis cuadros de 1m2 en los que se midió la biomasa útil producida en peso fresco,  dos veces durante el ciclo del...
Tipo: Tesis
Palavras-chave: Etnobotánica; Arvenses; Agroecosistemas tradicionales; Productividad; Biomasa útil; Maestría; Botánica; Ethnobotany; Agrestals; Traditional agroecosystems; Productivity; Useful biomass.
Ano: 2008
URL: http://hdl.handle.net/10521/1498

Productivity and efficiency of nitrogen fertilization in maize under different levels of urea and NBPT-treated urea
Provedor de dados: 64
Autores: Silva,Douglas Ramos Guelfi; Pereira,André Ferreira; Dourado,Ronaldo Liberato; Silva,Frederico Pinto da; Ávila,Fabrício William; Faquin,Valdemar.
The management of nitrogen fertilization is complex due to the various transformations of the nitrogen that occur in the soil-plant-atmosphere system, reducing the efficiency of the fertilization, productivity and the profit margin of the maize production areas. This study aimed to evaluate the effect of different levels of common urea and urea treat with NBPT [N-(n-butyl) thiophosphoric triamide] on the productivity and efficiency of the nitrogen fertilization in maize, correlated with simple economic analysis. The design of the field experiment was in randomized complete blocks with six repetitions, in a 2 x 4 factorial outline, made up of by two sources of nitrogen (urea and NBPT-treated urea) and four levels of nitrogen as top dressing (60, 120, 180...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Zea mays; Nitrogen; Urease inhibitor; Agronomic efficiency; Gross profit margin.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000300012

Productivity and N-leaching in organic dairy grass-arable crop rotations
Provedor de dados: 21
Autores: Eriksen, J.; Askegaard, M.; Søegaard, K.
Increasing size of organic dairy farms makes grazing of all cropped land inexpedient due to long distance to the milking facilities. We investigated nutrient dynamics and feed production in two dairy crop rotations with differences in proportion of grazing and cutting. One six year crop rotation represents close to the farm buildings (barley undersown with grass-clover -  4 years of grass-clover -  spring barley/catch crop) and another represents further away (barley undersown with grass-clover, 2 years of grass-clover -barley/catch crop - maize/catch crop - lupin/catch crop). In each of the crop rotations was made five treatments concerning grazing/cutting strategy and manure application. Results shows that herbage production was high in year 1-4 of...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Farm nutrient management; Air and water emissions.
Ano: 2009
URL: http://orgprints.org/16291/1/16291.pdf

Productivity and N-leaching in organic dairy grass-arable crop rotations
Provedor de dados: 21
Autores: Eriksen, J; Askegaard, M; Søegaard, K.
Due to increasing size of Danish organic dairy farms uniform grazing of all cropped land becomes inexpedient due to long distance to the milking facilities. We investigated nutrient dynamics and feed production in two dairy crop rotations with internal differences in proportion of grazing and cutting. One six year crop rotation represents close to the farm buildings (barley [Hordeum vulgare L.] undersown with grass-clover [Lolium perenne L.–Trifolium repens L.] -  4 years of grass-clover -  spring barley/catch crop) and another represents further away (barley undersown with grass-clover, 2 years of grass-clover -barley/catch crop - maize [Zea mays L.]/catch crop - lupin [Lupinus angustifolius]/catch crop). In each of the crop rotations was made five...
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2008
URL: http://orgprints.org/14641/1/27FA_Eriksen_el_al._final_paper.pdf

Productívíty of cassava and other crops in an intercropping system
Provedor de dados: 118
Autores: Silva,Daniel V; Ferreira,Evander A; Oliveira,Maxwel C; Pereira,Gustavo A. M; Braga,Renan R; dos Santos,José B; Aspiazu,Ignácio; Souza,Matheus F.
Intercropping is a common practice among farmers in tropical regions of the world and has persisted for years, not only for traditional reasons, but also for certain advantages that helped in its ecological adaptation. In regard to low income farmers with small areas for cultivation, more attention should be given to the cost of production and better land management. Thus, the aim of this work was to determine the best intercropping system of cassava with other crops. The experiment was conducted in an area belonging to the cassava (Manihot esculenta) producers of the Planalto de Minas district in Diamantina, Minas Gerais State, Brazil. The treatments comprised cassava intercropped with maize, beans and dwarf pigeon pea, as well as controls with and...
Tipo: Journal article
Palavras-chave: Area equivalence index; Harvest index; Manihot esculenta; Policultivation systems.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000100015

PRODUCTIVITY OF MAIZE HYBRIDS IN SINGLE AND GROWING WITH INTERCROPPED JATROPHA
Provedor de dados: 22
Autores: Silva, João Alfredo Neto da; Souza, Cristiano Márcio Alves de; Silva, Cesar José da; Fonseca, Paulo Rogério Beltramin da.
The aim of this study was to evaluate the performance of maize cultivars fitotécnico crop system in monocrop and intercropped with jatropha. The experiment was conducted in 2009/2010 harvest, at Fazenda Paraiso, located in the District of Itahum, City of Dourados, State of Mato Grosso do Sul in soil classified as Oxisol. The experimental design was a randomized block in factorial 3x2, three maize cultivars and two cropping systems (monocrop and intercropped), with four replications. The interaction between maize varieties and cropping system, the total dry mass and productivity for the three cultivars cropping system had the highest averages, indicating the great competition for factors of production offered by jatropha at this time of year. The BRS 1010...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Jatropha curcas L.; Sistema de cultivo; Sombreamento; Zea mays L.
Ano: 2015
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/8742

Productivity of Pak Chong soil after ten-year applications with NP-fertilizer and corn-legume cropping systems
Provedor de dados: 106
Autores: Amnat Suwanarit; Chairerk Suwannarat; Traisuda Waitruadrok.
Palavras-chave: Corn; Maize; Legumes; Cropping systems; NP fertilizers; Pak Chong soil; Soil productivity; ข้าวโพด; ผลผลิต; ระบบการปลูกพืช; ปุ๋ยไนโตรเจน; ปุ๋ยฟอสฟอรัส.
Ano: 1986
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4399

Productivity, profitability and partial nutrient balance in maize-based conventional and organic farming systems in Kenya
Provedor de dados: 21
Autores: Adamtey, Noah; Musyoka, Martha W.; Zundel, Christine; Cobo, Juan Guillermo; Karanja, Edward; Fiaboe, Komi K.M.; Muriuki, Anne; Mucheru-Muna, Monica; Vanlauwe, Bernard; Berset, Estelle; Messmer, Monika M.; Gattinger, Andreas; Bhullar, Gurbir S.; Cadisch, Georg; Fliessbach, Andreas; Mäder, Paul; Niggli, Urs; Forster, Dionys.
In 2007 two long-term trials were established in Kenya to contribute research-based evidence to the global debate on the productivity, economic viability and sustainability of different agricultural production systems. These trials compare conventional (Conv) and organic (Org) farming systems at high and low input levels at two locations, i.e. Chuka, with Humic Nitisols, high inherent soil fertility and rainfall, and Thika, with Rhodic Nitisols with low soil fertility and rainfall. The high input systems (High) represent commercial-scale, export-oriented production that uses the recommended amounts of fertilisers, pesticides and irrigation water to generate high yields, whilst the low input systems (Low) represent local smallholder practices, using...
Tipo: Journal paper
Palavras-chave: Farming Systems Cereals; Pulses and oilseeds Africa.
Ano: 2016
URL: http://orgprints.org/30697/1/Adamtey-etal-2016-AGEE-Vol235-p61-79.pdf

PRODUTIVIDADE E ANÁLISE ECONÔMICA DO CULTIVO CONSORCIADO DE MILHO E BRAQUIÁRIA NO NOROESTE DO PARANÁ
Provedor de dados: 196
Autores: Wenneck, Gustavo Soares; Saath, Reni; Araujo, Larissa Leite de; Pereira, Gustavo Lopes; Oliveira, Giovanna Gabriela Ferreira de; Sá, Nathália de Oliveira; Volpato, Camila de Souza.
A consorciação de milho e Urochloa ruziziensis apresenta potencial para os sistemas de produção agrícola, permitindo a produção de grãos e biomassa remanescente. O estudo tem como objetivo avaliar a produtividade e a viabilidade econômica das modalidades de consórcio de milho e U. ruziziensis na região noroeste do Paraná. O experimento foi conduzido em Maringá-PR, em delineamento inteiramente casualizado com cinco tratamentos (milho solteiro; U. ruziziensis solteira; milho com U. ruziziensis na entre linha; milho com U. ruziziensis na mesma linha; milho com U. ruziziensis em linhas intercaladas) e quatro repetições. Foi analisado o desenvolvimento inicial e produtividade de grãos do milho, e produção de biomassa de milho e U. ruziziensis. Os dados foram...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Grain production; No-Tillage System; Biomassa; Produção de grãos; Sistema Plantio Direto.
Ano: 2021
URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6163

Produtividade e lixiviação de nitrato em uma lavoura de milho de sequeiro usando dejeto de suíno e adubação mineral como fonte de nitrogênio.
Provedor de dados: 14
Autores: ANDRADE, C. de L. T. de; SILVA, D. F.; RESENDE, A. V. de; GARCIA, A. G. y; AMARAL, T. A.; PAIXÃO, J. S.
Dejetos de suínos (DS) têm um grande potencial como fertilizante e podem substituir parte ou todo o nitrogênio do adubo mineral (FM), necessários na produção agrícola. No entanto, DS também têm um alto potencial contaminante e devem ser manejados de forma adequada para evitar a poluição ambiental. Modelos de simulação, acoplados a sistemas de apoio à decisão, podem ser ferramentas eficientes para se avaliarem estratégias de manejo sustentável de dejetos. O objetivo deste estudo foi utilizar resultados de simulação para avaliar a sustentabilidade da produção de milho de sequeiro, adubado com diferentes doses de nitrogênio provenientes de DS e FM. O modelo CSM-CERES-Maize do Sistema de Apoio à Decisão para Transferência de Agrotecnologia, DSSAT, foi usada...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Sustentabilidade; Modelagem.; Simulação; Zea mays.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/968266

Produtividade potencial e variabilidade da produtividade de milho, em regime de sequeiro, em Rio Verde, Goiás.
Provedor de dados: 14
Autores: SILVA, P. P. G. da; ANDRADE, C. de L. T. de; MAGALHÃES, B. G.; GONTIJO NETO, M. M.; MELO, B. F. de.
A cultura do milho, quando sujeita a instabilidades climáticas, pode sofrer reduções severas no rendimento de grãos. O entendimento e a quantificação dos riscos climáticos envolvidos na produção de milho é, portanto, o primeiro passo para que se estabeleçam estratégias de manejo que possam minimizar esses riscos. Objetivou-se com este trabalho avaliar a variabilidade interanual da produtividade e a diferença entre a produtividade potencial e atingível de milho de sequeiro, para diferentes datas de semeadura, na safra e safrinha, em Rio Verde, Goiás. Empregou-se o modelo CSM-CERES-Maize, previamente parametrizado, juntamente com 33 anos de dados históricos diários de clima para simular cenários de épocas de semeadura, na safra e safrinha, e para avaliar a...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Seeding; Modelo de simulação; Semeadura; Zea mays; Simulation models; Sowing.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1055932

PROFITABILITY ANALYSIS OF BEAN PRODUCTION IN HONDURAS
Provedor de dados: 31
Autores: Tshering,   Chhime.
In Honduras, dry beans are the second most important staple crop, next to maize, in terms of both production and consumption. During the past decade, agricultural scientists in Honduras, in collaboration with Bean/Cowpea CRSP scientists, have released numerous new varieties, developed improved bean-management practices, and actively worked with governmental agencies, NGOs, and farmer groups to ensure that these improved technologies are widely available to farmers. However, data on national bean production in Honduras fail to demonstrate that agricultural research has had an impact on bean production, yields, and area harvested. Given the situation, profitability analysis represents an alternative approach for assessing the farm-level impact of research....
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries.
Ano: 2002
URL: http://purl.umn.edu/10936

PROFITABILITY OF FERTILIZER USE ON MAIZE BY SMALL-SCALE FARMING HOUSEHOLDS IN ZAMBIA
Provedor de dados: 31
Autores: Xu,   Zhiying; Jayne,   Thomas S.; Black,   J. Roy; Govereh,   Jones.
Multi-year nationwide survey data is used to estimate maize yield response functions and determine profitability of fertilizer use by small-scale farmers in Zambia. Most previous research on economics of fertilization used estimates of yield response to nutrients based on experimental or simulation data and seldom investigated region-specific and management-specific effects. In this paper we address the main issues arising from using large survey data and estimate maize yield response functions for different groups of households that have various management practices and soil conditions in two major agro-climatic zones. Profitability of fertilizer use is determined for each group in each zone and the results provide the following messages. First,...
Tipo: Conference Paper or Presentation
Palavras-chave: Farm Management.
Ano: 2005
URL: http://purl.umn.edu/19141

Profitability of maize for silage fertigated with nitrogen doses in different crops in a semiarid region of Brazil
Provedor de dados: 1
Autores: Souza, Ênio Gomes Flôr; Cruz, Ellen Abreu da; Silva, Michelangelo de Oliveira; Barbosa de Souza Prates, Fabiano; Barros Júnior, Aurélio Paes; Bezerra Neto, Francisco.
The objective of this work was to determine the adequate nitrogen (N) dose via fertigation associated with the maximum economic production of maize for silage, in two agricultural crops (summer and winter), in the municipality of Canindé de São Francisco-SE, Brazil. The experimental design was in randomized blocks, with four replicates. The treatments consisted of four doses of N (0, 80, 160, and 240 kg ha-1) using urea. The cultivar planted was the hybrid Bt Feroz. The evaluated characteristics were as follows: shoot fresh and dry mass productivity, gross and net incomes, the rate of return and net profit margin. There was an interaction between N doses and agricultural crops for all variables. Higher agroeconomic efficiency in the production of maize for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Forage storage; Meteorological conditions; Production costs; Economic dose.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42458

Profitability of new maize technology in Thailand :  An economic analysis of three years verification trials
Provedor de dados: 106
Autores: Harrington, L.W.; Rachain Thiraporn; Sarun Wattanutchariya.
19 tables
Palavras-chave: Corn; Maize; Economic analysis; Verification trial; Production technology; Fertilizer; Weeds; Hybrids; ข้าวโพด; เทคโนโลยีการผลิต; การวิเคราะห์ทางเศรษฐศาสตร์; ปุ๋ย; วัชพืช; ลูกผสม.
Ano: 1985
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4609

Program, abstracts and related documents.
Provedor de dados: 14
Autores: INTERNATIONAL TECHNICAL WORKSHOP ON BIOLOGICAL MANAGEMENT OF SOIL ECOSYSTEMS FOR SUSTAINABLE AGRICULTURE, 2002, Londrina.
The context: Soil biodiversity and sustainable agriculture; Abstracts - Theme 1: Monitoring and assessment: Bioindicators of soil health: assessment and monitoring for sustainable agriculture; Practical tools to measure soil health and their use by farmers; Biological soil quality from biomass to biodiversity - importance and resilience to management stress and disturbance; Integrated management of plant-parasitic nematodes in maize-bean cropping systems; Microbial quantitative and qualitative changes in soils under different crops and tillage management systems in Brazil; Diversity in the rhizobia associated with Phaseolus vulgaris L: in Ecuador and comparisons with Mexican bean rhizobia; Sistemas integrados ganadería-agricultura en Cuba; Soil macrofauna...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Manejo biológico do solo.; Agricultura Sustentável.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/463135

PROGRESS AND PROBLEMS IN PROMOTING HIGH EXTERNAL-INPUT TECHNOLOGIES IN SUB-SAHARAN AFRICA: THE SASAKAWA GLOBAL 2000 EXPERIENCE IN ETHIOPIA AND MOZAMBIQUE
Provedor de dados: 31
Autores: Howard,   Julie A.; Kelly,   Valerie A.; Maredia,   Mywish K.; Stepanek,   Julie; Crawford,   Eric W.
Critics argue that high external input technologies are too costly for African farmers, and that pilot programs to promote them are economically unsustainable.  This paper assesses Sasakawa-Global 2000 programs in Ethiopia and Mozambique; budgets, yield models and subsector analysis help explain the radically different country results and prognoses for sustainable adoption.
Tipo: Conference Paper or Presentation
Palavras-chave: Technology adoption; Sub-Saharan Africa; Sasakawa-Global 2000; Maize; Fertilizer; International Development; Research and Development/Tech Change/Emerging Technologies; O002; O003.
Ano: 1999
URL: http://purl.umn.edu/21570

Progress report in plant pathology for 1981
Provedor de dados: 106
Autores: Udom Pupipat; Thammasak Sommartya; Kitti Choonhawongse; Kittipong Pongboon; Prachum Jutawantana.
11 ill., 8 tables
Palavras-chave: Corn; Maize; Sorghum; Pathology; Downy mildew; Peronosclerospora sorghi; Varieties; Disease resistance; Leaf diseases; Anthracnose; Grey leaf spot; Leaf blight; Rusts; Plant diseases; Disease control; ข้าวโพด; ข้าวฟ่าง; โรคพืช; โรคราน้ำค้าง; โรคราบนช่อข้าวฟ่าง; โรคใบไหม้; โรคราสนิม; โรคใบจุด; โรคแอนแทรคโนส; โรคใบจุด; การคลุกเมล็ดด้วยสารเคมี.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4055

Progress report in plant pathology for the year 1975
Provedor de dados: 106
Autores: Udom Pupipat; Renfro, B.L.; Chiradej Chamswarng; Wantanee Saengwanich; Uthaiwan Saengwanich; Thammasak Sommartya; Pranee Wattanapanich; Kitti Choonhawongse.
1 ill.
Palavras-chave: Corn; Maize; Sorghum; Wild sugarcane; Saccharum spontaneum; Plant pathology; Downy mildew; Dichanthium caricosum; Fungi; Pathogenicity; Symptomatology; ข้าวโพด; ข้าวฟ่าง; โรคพืช; โรคราน้ำค้าง.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3841

Progress report on agricultural experiments in 1981/82 dry season
Provedor de dados: 106
Autores: Sakamoto, Haruhiko; Somrak Noradechanon.
4 ill., 3 tables
Palavras-chave: Corn; Maize; Sorghum; Intensive irrigation; Tasseling period; Pollination period; Seed storage; Germination; Yields; Quality; Agronomic characters; ข้าวโพด; ข้าวฟ่าง; การให้น้ำ; ความงอก; การเก็บรักษาเมล็ดพันธุ์.
Ano: 1981
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4065

Progress report on applied experiments
Provedor de dados: 106
Autores: Sakamoto, Haruhiko; Somrak Noradechanon.
7 ill., 9 tables
Palavras-chave: Corn; Maize; Sorghum; Intensive irrigation; Seed storage; Seed germination; Fertilizers; Plant population; Varieties; Crop rotation; Reddish brown lateritic; Yields; Agronomic characters; ข้าวโพด; ข้าวฟ่าง; การให้น้ำ; การทดสอบผลผลิต; การผลิต.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4112

Progress report on control of purple nutsedge with glyphosate under field condition
Provedor de dados: 106
Autores: Suwunnamek, U.; Kongsangdow, A.; Chaochong, S.
2 ill., 2 tables
Palavras-chave: Corn; Maize; Purple nutsedge; Glyphosate; Weed control; Yields; ข้าวโพด; แห้วหมู; ไกลโฟเสท.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3935

Progress report on corn downy mildew research at Kasetsart University, 1976
Provedor de dados: 106
Autores: Udom Pupipat; Thammasak Sommartya; Chiradej Chamswarng; Phatak, H.C.; Vichit Kriengyakul; Kitti Choonhawongse; Uraporn Sardsud.
1 ill.
Palavras-chave: Corn; Maize; Downy mildew; Serology; Pathogenicity; Infectivity; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3871

Progress report on corn downy mildew research in 1974
Provedor de dados: 106
22 ill., 14 tables
Palavras-chave: Corn; Maize; Downy mildew; Plant diseases; Sclerospora; Seed transmission; Digitaria bicornis; Conidiophores; Conidia; Sclerospora sorghi; Varieties; Disease resistance; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3800

Progress report on corn production by a rubber estate
Provedor de dados: 106
Autores: Barnes, D.E.
Palavras-chave: Corn; Maize; Production; Rubber area; Rubber production; Intercropping; ข้าวโพด; ยางพารา; การผลิต; พื้นที่ปลูกยางพารา.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3748

Progress report on downy mildew of corn in Thailand
Provedor de dados: 106
Autores: Boon-long, J.; Korpraditskul, V.; Pupipat, U.; Renfro, B.L.
9 tables
Palavras-chave: Corn; Maize; Downy mildew; Thailand; ข้าวโพด; โรคราน้ำค้าง; ประเทศไทย.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3903

Progress report on nutsedge control with glyphosate
Provedor de dados: 106
Autores: Umporn Suwunnamek; Anchern Kongsangdow.
1 table
Palavras-chave: Corn; Maize; Nutsedge; Glyphosate; Weed control; ข้าวโพด; แห้วหมู; ไกลโฟเสท; วัชพืช.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3858

Progress report on research project for development
Provedor de dados: 106
Autores: Aschan Sukthumrong.
3 ill., 7 tables
Palavras-chave: Corn; Maize; Sorghum; Research projects; Administration; Activities; ข้าวโพด; ข้าวฟ่าง; แปลงทดลอง; แรงงาน; วัตถุทดลอง.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4040

Progress report on sweet corn breeding program 1982
Provedor de dados: 106
Autores: Tavat Lavapauraya; Prachum Jutawantana; Surapol Chowchong; Chantravipha Dhanasobhon.
3 tables
Palavras-chave: Corn; Maize; Sweet corn; Plant breeding; Hybrids; Yields; Quality; ข้าวโพด; ข้าวโพดหวาน; การปรับปรุงพันธุ์; พันธุ์ลูกผสม.
Ano: 1982
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4084

Progress report on witchweed (Striga asiatica (L.) Kuntze): A root parasitic weed of corn in Thailand
Provedor de dados: 106
Autores: Maneesa Teerawatsakul; Somchart Kanjanajirawong.
Palavras-chave: Corn; Maize; Witchweed; Root parasite; Striga asiatica; Weed control; ข้าวโพด; หญ้าแม่มด; ปรสิตที่เกาะอยู่ที่ราก.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3936

Progress report on witchweed (Striga asiatica (L.) O. Kuntze) a root parasitic weed of corn in Thailand
Provedor de dados: 106
Autores: Maneesa Teerawatsakul; Somchart Kanjanajirawong.
1 table
Palavras-chave: Corn; Maize; Witchweed; Striga asiatica; Root parasite; Herbicides; Weed control; Yields; ข้าวโพด; หญ้าแม่มด; ปรสิตที่เกาะรากพืช.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3859

Prolificidade?
Provedor de dados: 14
Autores: DURAES, F. O. M.
bitstream/item/40407/1/Prolificidade-habilidade.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Maize.; Melhoramento; Milho; Zea Mays.; Breeding.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/482806

Prolificidade em milho. 1. tipificacao e estrategias para o melhoramento.
Provedor de dados: 14
Autores: DURAES, F. O. M.; GAMA, E. E. G. e; OLIVEIRA, A. C. de.
bitstream/item/30328/1/Pesq.And.-41.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Prolificidade; Maize; Prolificity.; Melhoramento; Milho; Zea Mays.; Breeding.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/483406

Proline and trehalose in maize seeds germinating under low osmotic potentials
Provedor de dados: 91
Autores: Queiroz,Rafaela J. B.; Cazetta,Jairo O.
ABSTRACT Although it is relatively well known that adult plants tend to accumulate proline and trehalose in their tissues as a physiological mechanism in response to drought, there is scarce information about the development of this physiological response in seeds. Thus, the objective of this research was to verify if maize seeds are able to develop mechanism of osmoprotection, when are germinating under low osmotic potential, and the possibility to use the levels of trehalose and proline in a defined seed part, aiming to differentiate genotypes regarding drought tolerance. The experiment was performed as a factorial arrangement of 2 x 5 (2 hybrids x 5 osmotic potential) within a completely randomized design, with four replicates. It was found that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Germination; Water restriction; Osmoregulation; Compatible solutes.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100022

Promotion of corn and sorghum in Thailand
Provedor de dados: 106
Autores: Yookti Sarikaphuti.
Palavras-chave: Corn; Maize; Sorghum; Production; Promotion; Marketing; Thailand; ข้าวโพด; ข้าวฟ่าง; การผลิต; การใช้ประโยชน์; แหล่งของเมล็ดพันธุ์; การตลาด; ราคา.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4001

Proportional odds model applied to mapping of disease resistance genes in plants
Provedor de dados: 74
Autores: Spyrides-Cunha,Maria Helena; Demétrio,Clarice G.B.; Camargo,Luis E.A.
Molecular markers have been used extensively to map quantitative trait loci (QTL) controlling disease resistance in plants. Mapping is usually done by establishing a statistical association between molecular marker genotypes and quantitative variations in disease resistance. However, most statistical approaches require a continuous distribution of the response variable, a requirement not always met since evaluation of disease resistance is often done using visual ratings based on an ordinal scale of disease severity. This paper discusses the application of the proportional odds model to the mapping of disease resistance genes in plants amenable to expression as ordinal data. The model was used to map two resistance QTL of maize to Puccinia sorghi. The...
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100039

Propositions de mesures à court terme pour réduire le haut niveau des prix de certaines denrées de première nécessité notamment les céréales, le bétail-viande et le ciment
Provedor de dados: 31
Autores: Dembele,   Niama Nango; Traore,   Abdramane.
The high increase in the prices of cereals, meat, and building materials is due to the weakness of stocks, increased exports, and the increase of internal demand. To attenuate the effect of the high increase in the price of cereals, meat and cement, the following measures are necessary: • Import important quantities of maize • Draw down on the national security stock, in consultation with the donors. • Reduce the price of animal feeds through reduction in the price of cotton-seed from the state-run cotton ginning facilities • Reduce slaughter fees • Reduce the cost of transportation through reduction in taxes on fuel and spare parts, and • Reduce the tariff on imports of cement Elements of a medium-term strategy to hold down food prices include: • At the...
Tipo: Working or Discussion Paper
Palavras-chave: Food Security; Food Policy; Mali; Agricultural and Food Policy; Q18.
Ano: 2002
URL: http://purl.umn.edu/55453

Propriedades físicas de Latossolo Vermelho distroférrico típico sob sistemas de manejo na sucessão soja-milho no período de três anos - DOI: 10.4025/actasciagron.v29i5.755
Provedor de dados: 1
Autores: Lopes, Reny Adilmar Prestes; UNIOESTE; Nóbrega, Lúcia Helena Pereira; UNIOESTE - Cascavel; Uribe-Opazo, Miguel Angel; UNIOESTE; Prior, Maritane; UNIOESTE; Pereira, Joaquim Odilon; UNIOESTE.
Este trabalho avaliou alterações das propriedades físicas teor de água, densidade e porosidade do solo em áreas sob sistemas de semeadura direta e preparo convencional nas culturas de soja e milho em três anos agrícolas. O experimento foi instalado no Núcleo Experimental de Engenharia Agrícola da Unioeste (Cascavel, Estado do Paraná). Nos dois primeiros anos foi implantada a cultura de soja; no terceiro ano, milho, como cultura de verão, e aveia preta e nabo forrageiro, como cobertura de inverno. Durante os três anos, foram observados redução do teor de água e densidade do solo e aumento da porosidade. As variações nas propriedades físicas do solo mostraram relação diretamente proporcional entre teor de água e densidade do solo e inversamente para...
Palavras-chave: 5.00.00.00-4    Ciências Agrárias semeadura direta; Preparo convencional; Rotação de culturas 5.00.00.00-4    Ciências Agrárias.
Ano: 2007
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/755

Propriedades químicas de um LATOSSOLO VERMELHO Eutroférrico após aplicação por dois anos consecutivos de lodo de esgoto
Provedor de dados: 1
Autores: Cesare Barbosa, Graziela Moraes; UEL; Tavares Filho, João; UEL; de Batista Fonseca, Inês Cristina; UEL.
O destino do lodo de esgoto é um dos problemas ambientais urbanos mais relevantes na atualidade. Assim, este trabalho teve por objetivo avaliar as propriedades químicas e a produtividade de milho safrinha em um LATOSSOLO VERMELHO Eutroférrico tratado com lodo de esgoto por dois anos consecutivos. As análises foram realizadas em um experimento instalado na Fazenda Escola da Universidade Estadual de Londrina, Estado do Paraná, que apresentava delineamento em blocos ao acaso, contendo 3 repetições com os seguintes tratamentos: sem adubação, somente adubação mineral, adubação orgânica com lodo de esgoto (em base seca) em doses crescentes de 6, 12, 18, 24 e 36 t.ha-1. Nas avaliações, foram determinados pH, teores de Ca2+, Mg2+, P, K+, CTC, V %, carbono orgânico...
Palavras-chave: 5.00.00.00-4    Ciências Agrárias biossólidos; Propriedades químicas; Matéria orgânica 5.00.00.00-4    Ciências Agrárias.
Ano: 2002
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2430

Prospect and progress of corn improvement in Thailand
Provedor de dados: 106
Autores: Phit Panyalakshana.
Palavras-chave: Corn; Maize; Corn improvement; Plant breeding; Thailand; ข้าวโพด; การปรับปรุงพันธุ์; ประเทศไทย.
Ano: 1964
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3724

Prospecting sugarcane genes involved in aluminum tolerance
Provedor de dados: 74
Autores: Drummond,Rodrigo D.; Guimarães,Claudia T.; Felix,Juliana; Ninamango-Cárdenas,Fernando E.; Carneiro,Newton P.; Paiva,Edilson; Menossi,Marcelo.
Aluminum is one of the major factors that affect plant development in acid soils, causing a substantial reduction in yield in many crops. In South America, about 66% of the land surface is made up of acid soils where high aluminum saturation is one of the main limiting factors for agriculture. The biochemical and molecular basis of aluminum tolerance in plants is far from being completely understood despite a growing number of studies, and in the specific case of sugarcane there are virtually no reports on the effects of gene regulation on aluminum stress. The objective of the work presented in this paper was to prospect the sugarcane expressed sequence tag (SUCEST) data bank for sugarcane genes related to several biochemical pathways known to be involved...
Tipo: Info:eu-repo/semantics/article
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572001000100029

Prospects and limitations for agricultural engineering in the development of sustainable weed control methods – examples from European research
Provedor de dados: 21
Autores: Melander, Scientist Bo; Heisel, Scientist Torben.
This paper gives a brief review of the major achievements in European research on physical weed control methods for agricultural and horticultural crops. Most of the work has emerged from an increasing awareness and concern about pesticide consumption in many Western European countries. Also an increasing interest in organic farming has further pushed the development of more sustainable weed control methods. Generally, the research has been joint projects between engineers and agronomists and the results have so far revealed some prospects as well as limitations for non-chemical methods to become useful solutions, not only for the organic growers but also for the conventional ones. A number of investigations have focussed on rather simple low-tech...
Tipo: Conference paper, poster, etc.
Palavras-chave: Weed management.
Ano: 2002
URL: http://orgprints.org/1548/1/BME_DK_WAGGA1.pdf

Prospects for a corn and sorghum seed industry in Thailand
Provedor de dados: 106
Autores: Gregg, Bill.
9 tables
Palavras-chave: Corn; Maize; Sorghum; Seed industry; Seed production; Domestic use; Thailand; ข้าวโพด; ข้าวฟ่าง; การผลิตเมล็ดพันธุ์; อุตสาหกรรมเมล็ดพันธุ์; การใช้เมล็ดพันธุ์ภายในประเทศ.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3991

Prospects for using transgenic resistance to insects in crop improvement
Provedor de dados: 69
Autores: Sharma,Hari C.; Sharma,Kiran K.; Seetharama,Nadoor; Ortiz,Rodomiro.
Integrated pest management has historically placed great hopes on host plant resistance. However, conventional host-plant resistance to insects involves quantitative traits at several loci. As a result, the progress has been slow and difficult to achieve. With the advent of genetic transformation techniques, it has become possible to clone and insert genes into the crop plants to confer resistance to insect pests. Resistance to insects has been demonstrated in transgenic plants expressing genes for delta-endotoxins from Bacillus thuringiensis (Bt), protease inhibitors, enzymes and plant lectins. Most of the plant derived genes produce chronic rather than toxic effects and some insect pests are not sensitive to some of these factors. The potential of plant...
Tipo: Journal article
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582000000200001

Prospects of Chinese Grain Supply and Demand in 2010: A Regionalized Multimarket Model Simulation and Policy Implication
Provedor de dados: 31
Autores: Lu,   Wencong C.; Kersten,   Lutz.
Based on China's Agricultural Regional Market Equilibrium Model (CARMEM), the paper projects the production and consumption of rice, wheat and maize in China toward 2010 at both national and regional level under two different scenarios. The results show that China can ensure a stable grain market development under more liberalized internal and external conditions. Transmission of the world market prices as projected by the World Bank (2003) to the Chinese domestic market would lead to a long-run recovery of the growth in grain production. Total production of paddy rice, wheat and maize is forecast to increase from 386 million tons in the base period 2002 to over 420 million tons in 2010. However, the rate of grain self-supply will be 91% due to higher...
Tipo: Conference Paper or Presentation
Palavras-chave: China; Grain market; Projection; Multimarket model; Policy; Crop Production/Industries; Q11; Q13; Q18.
Ano: 2006
URL: http://purl.umn.edu/25662

Prospects of corn production in Thailand
Provedor de dados: 106
Autores: Chamnien Boonma.
5 tables
Palavras-chave: Corn; Maize; Corn production; Farmers; Opinions; Thailand; ข้าวโพด; สายพันธุ์; แหล่งของเมล็ดพันธุ์; อัตราปลูก; การใส่ปุ๋ย; สารกำจัดศัตรูพืช; ข้อจำกัดของการผลิต; แมลงศัตรูพืช.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3945

Prospects of Feed Crops in India: The Role of CGPRT Crops
Provedor de dados: 31
Autores: Pathak,   P.S.
The study was initiated to understand the demand-supply gap of various feed crops and identify measures to bridge it. Several models were introduced and discussed in a meeting held in Bogor (Indonesia) in September 2001 for determining the demand and supply of different feed crops. These are presented in this study. For this study, data was collected from the Department of Animal Husbandry and Dairying, Directorate of Economics and Statistics, Ministry of Agriculture, Govt. of India, New Delhi. Data was also collected from other sources to understand the behaviour of exports and also the uses of animal feeds. Information from the Director and scientists at the National Centre for Agricultural Economics and Policy Research, New Delhi and Agricultural...
Tipo: Report
Palavras-chave: Feed crops; Demand; Supply; Plant production; Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/32703

Prospects of Feed Crops in Pakistan: The Role of CGPRT Crops
Provedor de dados: 31
Autores: Khan,   Abdul Gaffar.
This study was conducted under the CGPRT sponsored project on "Prospects of Feed Crops in South Asia-Pakistan (Feed)" to generate information on historical dynamics, future trends of demand and supply for feed crops/products, evaluation of potentials, weaknesses, opportunities and constraints for expanding feed crop farming in Pakistan, proposing possible schemes for trade and development of feed crops among Asian countries and the formulation of policy options to promote sustainable development of feed crop farming in Pakistan. In Pakistan, feed crops, which are being used in livestock and poultry feeding as grains, are mainly wheat, maize, sorghum and millet. These cereal crops are basically grown to meet human dietary requirements with a primary focus...
Tipo: Report
Palavras-chave: Feeds; Feed crops; Production; Consumption; Supply balance; Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/32678

Prospects of Feed Crops in Sri Lanka: The Role of CGPRT Crops
Provedor de dados: 31
Autores: Karunatilake,   K.E.
Due to the rapid expansion of the poultry industry not only in Sri Lanka but also in other countries, the demand for feed crops has increased substantially. The CGPRT Centre initiated a study to analyze the situation in South Asia under a project called "Prospects of Feed Crops in South Asia (FEED)". The study was initiated to understand the demand-supply gap, weaknesses, opportunities, constraints and policy options to bridge the gap of feed crops in Sri Lanka. For this study, the data was collected from the Department of Animal Production and Health (AP &amp; H), the Department of Census &amp; Statistics and the Central Bank of Sri Lanka. Additional data was collected from other sources such as the Department of National Planning, Sri Lanka Customs and...
Tipo: Report
Palavras-chave: Feed crops; Demand; Supply; Plant production; Crop Production/Industries.
Ano: 2003
URL: http://purl.umn.edu/32707

Protein hydrophobic dressing on seeds aiming at the delay of undesirable germination
Provedor de dados: 63
Autores: Assis,Odilio Benedito Garrido; Leoni,Ariane Maria.
Polymer seed-coatings have been largely tested as an alternative method for preventing diseases and have the potential to be used to control undesirable germination and thereby increasing seed storage. Amongst these, the protein-based coatings can be applied with advantage of forming stable biodegradable and hydrophobic films. Due to their chemical structure, protein dressings act as efficient barriers for water uptake, even when seeds are unavoidable exposed to a moist environment. In this work, the effect of hydrophobic dressings was tested on the germination rate of sugar beet (Beta vulgaris L.) and broccolis (Brassica oleraceae var italic L.) seeds under laboratorial condition. Zein, natural maize (Zea mays L.) proteins extracted from gluten meal, was...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Seed dressing; Undesirable germination control; Protein coating; Seed storage.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000100017

Protocolo para coleta e análise de dados experimentais para calibração e avaliação do modelo CSM-CERES-Maize para a cultura do milho.
Provedor de dados: 14
Autores: ANDRADE, C. de L. T. de; SOUZA, I. R. P. de; AMARAL, T. A.
A modelagem é uma ferramenta que tem sido aplicada em diversos estudos que vão da resposta das culturas às mudanças climáticas (Grossi et al., 2015) ao manejo, incluindo épocas de semeadura, uso ou não de irrigação, doses de fertilizantes nitrogenados, passando pelo melhoramento genético de plantas e pelo manejo de dejetos animais (Andrade et al., 2012). Um modelo baseado em processos biofísicos foi empregado para determinar a aptidão e o período de semeadura de milho de sequeiro no estado de Minas Gerais (Paixão et al., 2016), demonstrando que este tipo de ferramenta seria útil no Zoneamento Agrícola de Risco Climático do Ministério da Agricultura, Pecuária e Abastecimento (Mapa). Há vários modelos baseados em processos biofísicos disponíveis, entre os...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Modelo de Simulação; Produtividade; Zea Mays.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126467

Protocolos De Laboratorio - Laboratorio De Genética Molecular Aplicada Del CIMMYT
Provedor de dados: 31
Tercera Edicion
Tipo: Report
Palavras-chave: Inmunoensayos de quimioluminiscencia; ADN; Hibridación del ADN; Marcadores moleculares; PCR; RAPD; RFLP; Research and Development/Tech Change/Emerging Technologies; F30.
Ano: 2006
URL: http://purl.umn.edu/56183

Protocolos para experimentação, identificação, coleta e envio de amostras da cigarrinha Dalbulus maidis e de plantas com enfezamentos em milho.
Provedor de dados: 14
Autores: SILVA, D. D. da; SOUZA, I. R. P. de; OLIVEIRA, I. R. de; MENDES, S. M.; COTA, L. V.; COSTA, R. V. da; OLIVEIRA, C. M. de; MEIRELLES, W. F.; BORDIN, I.; BIANCO R.; ANDROCIOLI, H. G.; SILVA, M. R. L. da; LEMISKA, A.; ARAÚJO, M. M.
Diante do alto risco de ocorrência dos enfezamentos e da crescente demanda por padronização nas pesquisas que favoreçam o avanço de estratégias de manejo dos enfezamentos e controle eficiente da cigarrinha, este protocolo foi elaborado por pesquisadores da Embrapa com a colaboração Agropecuária do Paraná - ADAPAR. Quatro protocolos descrevem metodologias e recomendações para experimentação de campo, identificação de sintomas dos enfezamentos e da cigarrinha, identificação molecular dos patógenos, coletas, amostragem e envio de cigarrinhas e partes das plantas de milho para análises. Espera-se assim que as pesquisas ocorram de forma padronizada, fornecendo dados robustos que permitam o avanço de conhecimento baseado em critérios que favoreçam a elaboração...
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cigarrinha-do-milho; Risca-do-milho; Virose-raiado-fino; Inseto; Praga de Planta; Cigarrinha; Enfezamento; Maize rayado fino virus.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1132039

PROVA  DI COLTIVAZIONE BIOLOGICA DI ANTICHI MAIS PIEMONTESI DESTINATI ALL'ALIMENTAZIONE UMANA
Provedor de dados: 21
Autores: SPAGNOLO, SANDRA; PINNA, MASSIMO; GAMBA, URSULA; ZACCARA, PATRIZIA; POSSETTO, DARIO; VALOTI, PAOLO.
La ricerca sul territorio di varietà locali di mais ha permesso di individuare sette  ecotipi caratteristici della nostra regione: Pignoletto Rosso, Pignoletto Giallo,  Ottofile Giallo, Ottofile Bianco, Ottofile Rosso, Nostrano dell’Isola, Ostenga. Al  fine di definire le caratteristiche agronomiche e l’attitudine a determinate trasformazioni per uso alimentare, verificare i livelli produttivi e la possibilità di  coltivazione in agricoltura biologica, sono stati allestiti campi di confronto delle  varietà piemontesi in diversi siti a vocazione maidicola.  Inoltre sono state eseguite analisi qualitative delle produzioni ottenute, prove  di trasformazione e verifica del livello di gradimento da parte dei consumatori.
Tipo: Journal paper
Palavras-chave: Cereals; Pulses and oilseeds Biodiversity and ecosystem services.
Ano: 2005
URL: http://orgprints.org/6820/1/mais_biologico.pdf

Prüfung und Empfehlungen von Maissorten für den ökologischen Landbau
Provedor de dados: 21
Autores: Meßner, Helmut.
Ziel des Projektes „Prüfung und Empfehlung von Maissorten für den Ökologischen Landbau“ war es, für ökologisch wirtschaftende Betriebe, die Mais bereits im Anbau haben oder sich mit dem zukünftigen Anbau von Mais befassen, umfassende Informationen bzgl. der Genotyp bedingten Unterschiede des Leistungs- und Abreifeverhaltens des geprüften Maissortenspektrums zu erarbeiten.   Mit dem  Projekt sollte im Sinne der neugefassten VO 1452/2003 auch ein Prozess der Ökosaatgut-Erzeugung für Mais in Gang gesetzt werden.   Das Projektkonzept basiert auf einer zentralen Versuchsorganisation für das Jahr 2003 mit koordinierter Saatgutbestellung und -versendung, einer bundesweiten Orthogonalität der Versuchsanlage (11 Standorte für Silomais, 5 Standorte für Körnermais)...
Tipo: Report
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2004
URL: http://orgprints.org/12873/1/12873%2D02OE454%2Dmaiskomitee%2Dmessner%2D2004%2Dlsv_mais.pdf

Prüfung und Empfehlungen von Maissorten für den ökologischen Landbau
Provedor de dados: 21
Autores: Meßner, Helmut.
Ziel des Projektes „Prüfung und Empfehlung von Maissorten für den Ökologischen Landbau“ war es, für ökologisch wirtschaftende Betriebe, die Mais bereits im Anbau haben oder sich mit dem zukünftigen Anbau von Mais befassen, umfassende Informationen bzgl. der Genotyp bedingten Unterschiede des Leistungs- und Abreifeverhaltens des geprüften Maissortenspektrums zu erarbeiten.   Mit dem  Projekt sollte im Sinne der neugefassten VO 1452/2003 auch ein Prozess der Ökosaatgut-Erzeugung für Mais in Gang gesetzt werden.   Das Projektkonzept basiert auf einer zentralen Versuchsorganisation für das Jahr 2003 mit koordinierter Saatgutbestellung und -versendung, einer bundesweiten Orthogonalität der Versuchsanlage (11 Standorte für Silomais, 5 Standorte für Körnermais)...
Tipo: Project description
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2004

Public Policy and Farm-level Strategies for Coexistence in Germany – A Case Study of Bt-maize in Brandenburg
Provedor de dados: 31
Autores: Consmuller,   Nicola; Beckmann,   Volker; Schleyer,   Christian.
The regulatory framework for growing GM crops in Germany comprises quite liberal ex-ante regulations with very strict ex-post liability rules to protect other production forms from possible negative side effects of transgenic plants. Regulation is assumed to impose additional costs on farmers who intend to plant Bt-maize. This paper investigates the significance of these costs and the possibility of minimizing them by farm-level strategies such as coordination and cooperation between the Bt-maize growing farmer and his neighbours. A case study investigating the behaviour of Bt-maize growing farmers was carried out in the Oderbruch region in the federal state of Brandenburg, Germany. This region is leading in Bt-maize cultivation in Germany and has a high...
Tipo: Conference Paper or Presentation
Palavras-chave: Coexistence; Ex-ante regulation and ex-post liability; Germany; Agricultural and Food Policy; Crop Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/44187

Qualidade física do solo em sistemas de preparo convencional e plantio direto em latossolo do cerrado.
Provedor de dados: 14
Autores: SANTOS JÚNIOR, J. de D. G.; SÁ. M. A. C. de; REIN, T. A.
RESUMO: Menor desenvolvimento inicial em plantas de soja (safra 2004/2005) foi observado em plantio direto (PD em comparação ao plantio convencional (PC) em área experimental da Embrapa Cerrados. Diferenças visuais no sistema radicular sugeriram adensamento superficial no PD. Nesse local, avaliaram-se as alterações nos atributos físicos do solo relacionados aos sistemas de preparo e ao crescimento do milho cultivado, em sucessão à soja, na safra 2005/2006. O delineamento experimental foi em blocos completos ao acaso, com quatro repetições. Atributos físico-hídricos do solo, intervalo hídrico ótimo (IHO), parâmetro S e índice de cone determinado a campo (IC campo) foram avaliados como indicadores da qualidade física do solo. Os sistemas de preparo...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Plantio convencional; Densidade; Intervalo hídrico; Water availability; Soil chemicophysical properties; Zero tillage.; Disponibilidade de Água; Física do Solo; Plantio Direto; Solo.; Density; Conventional tillage; Soil.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570280

Qualidade sanitária de sementes de trigo, soja e milho produzidas em Mato Grosso do Sul.
Provedor de dados: 14
Autores: GOULART, A. C. P.
bitstream/item/77982/1/Qualidade-Sanitaria-de-Sementes-de-Trigo-Soja-e-Milho-Produzidas-em-Mato-Grosso-do-Sul..pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Milho Semente; Brasil; Mato Grosso do Sul; Maize; Soybean; Plant diseases.; Cerrado; Doença; Fungo; Glycine Max; Triticum Aestivum; Trigo; Soja; Zea Mays.; Brazil; Seeds; Wheat.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/241395

Quantificação do crescimento radicular em perfil de solo.
Provedor de dados: 14
Autores: REATTO, A.; BROSSARD, M.; CARVALHO, A. M. de; MARTINS, E de S.; SILVA, A. V. da.
RESUMO: O estudo do comportamento radicular facilita a compreensão da parte aérea da planta e do manejo do solo. O trabalho objetivou avaliar a concentração radicular através do programa Ambiente para visualização de Imagens (ENVI), em perfis culturais sob diferentes sistemas de manejo, na Embrapa Cerrados, Planaltina - DF. O experimento foi constituído de uma rotação de milho e espécies condicionadoras de solo em manejos diferenciados (plantio direto e convencional, com incorporação de espécies). Foram realizadas análises de imagens de raízes nas profundidades 0 - 25 cm e 25 - 50 cm coletados em vídeo, convertidas em modo digital e processadas em ENVI por semelhança de pixels; quantificadas e os resultados representados em tabelas e gráficos. Avaliação...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Planta condicionadora; ENVI; Zero tillage; Cover plants; Direct drilling.; Cerrado; Manejo do Solo; Planta de Cobertura; Plantio Direto; Raiz; Sistema Radicular.; Soil management.; Root systems; Roots.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569005

Quantification of the soil physical quality of a tropical oxisol using the S index
Provedor de dados: 63
Autores: Tormena,Cássio Antonio; Silva,Álvaro Pires da; Imhoff,Silvia Del Carmen; Dexter,Anthony Roger.
Soil physical quality is fundamental for the sustainability of agro ecosystems. Soil physical quality assessment must be developed using parameters that describe physical behavior. S, a new soil physical parameter has recently been introduced for assessing the soil physical quality. A good soil physical quality has been associated with values of S &gt; 0.035 in soils from temperate climates. However, S has not been evaluated in tropical soils yet. Therefore we tested the hypothesis that S is a reliable soil physical quality indicator of a Typic Hapludox cropped with maize under no-tillage (NT) and conventional tillage (CT). Undisturbed samples were collected from each tillage system in the row and interrow positions. Soil bulk density was determined in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bulk density; Tropical soils; No-tillage; Soil water retention; Soil structure.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000100008

QUANTITATIVE ANALYSIS OF DATA FROM PARTICIPATORY METHODS IN PLANT BREEDING
Provedor de dados: 31
Autores: Bellon,   Mauricio R.; Reeves,   Jane.
Although participatory plant breeding (PPB) is gaining greater acceptance worldwide, the techniques needed to analyze the data from participatory methodologies in the context of plant breeding are still not well known or understood. Scientists from different disciplines and cropping backgrounds, working in international research centers and universities, discussed and exchanged methods and ideas at a workshop on the quantitative analysis of data from participatory methods in plant breeding. The papers in this volume address the three themes of the workshop: designing and analyzing joint experiments involving variety evaluation by farmers; identifying and analyzing farmers' evaluations of crop characteristics and varieties; and dealing with social...
Tipo: Book Chapter
Palavras-chave: Research Methods/ Statistical Methods.
Ano: 2002
URL: http://purl.umn.edu/23718

Quantitative genetic studies on breeding maize for adaptation to organic farming
Provedor de dados: 21
Autores: Burger, H.; Schloen, M.; Schmidt, W.; Geiger, H. H.
Organic farming has gained in importance in Germany during recent years.Therefore an increasing demand exists for varieties with specific adaptation to this farming system. In the present study we therefore conducted comparative field experiments with modern maize breeding materials under organic versus conventional farming conditions (ORGandCON, respectively) to estimate quantitative genetic parameters needed for developing optimal breeding strategies and to investigate the perspectives of selection for specific adaptation to ORG. Starting from two broad samples of elite germplasm, consisting of 178 flint and dent lines, respectively, fractions of 11 flint and 11 dent lines were selected based on their testcross performance under ORG. A corresponding set...
Tipo: Journal paper
Palavras-chave: Breeding; Genetics and propagation Root crops.
Ano: 2008
URL: http://orgprints.org/15795/1/burger%2Detal%2D2008%2DEuphytica_Final_Proof.pdf

Quantitative variation for grain quality in Brazilian maize populations
Provedor de dados: 63
Autores: Mittelmann,Andréa; Miranda Filho,José Branco de; Nass,Luciano Lourenço; Lima,Gustavo Júlio Melo Monteiro de; Hara-Klein,Claudete; Silva,Ricardo Machado da.
Development of maize (Zea mays L.) cultivars with high grain protein and oil concentrations and an appropriate amino acid composition, without losses in grain yield, represents a challenge in breeding programs. The objective of this work was to study the nutritional quality of ten Brazilian maize populations evaluated in three environments. A randomized block design with six replications was used. Ear yield and the concentrations of protein, oil, serine, glutamic acid, alanine, leucine, tyrosine and phenylalanine were evaluated. Individual and combined analyses of variance were performed. Populations diverged for most of the traits. Environmental effects influenced variation for most of the traits, unlike genotype-environment interaction, allowing the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant breeding; Nutritional quality; Protein; Amino acids.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000100008

Quantitative variation in the tropical maize population, ESALQ-PB1
Provedor de dados: 63
Autores: Andrade,João Antonio da Costa; Miranda Filho,José Branco de.
Good yield and intermediate plant height, ear height, and tassel size characterize the maize population ESALQ-PB1 as an outstanding breeding population. Estimates of genetic parameters are reported for 13 traits: plant height (PH), ear height (EH), ear placement (EP), tassel length (TL), tassel weight (TW), tassel branch number (TB), ear weight (EW), total grain weight (GW), ear length (EL), ear diameter (ED), kernel row number (RN), kernel number per row (KR) and prolificacy (PR). Results refer to one location and one year. Genetic variation was detected for all traits, and the estimates of the additive genetic variance are presented. The coefficients of heritability (individual basis) varied from 0.14 to 0.72 and were considered high for PH, EH and TB;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic parameters; Genetic variability; Heritability; Recurrent selection.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000200011

Quanto custa tratar as sementes de soja, milho e algodão com fungicidas?
Provedor de dados: 14
Autores: GOULART, A. C. P.; MELO FILHO, G. A. de.
As sementes de soja e os fungos; As sementes de milho e os fungos; As sementes de algodao e os fungos; Custo do tratamento de sementes.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Soybean; Maize.; Análise Econômica; Algodão; Cerrado; Fungicida; Glycine Max; Gossypium Hirsutum; Milho; Tratamento de Semente; Zea Mays.; Soja; Cotton; Economic analysis; Fungicides; Seed treatment.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/243312

Que Colheita e Preços Esperar para a Época de Comercialização Agrícola 2005/06? Expectativas dos Comerciantes de Pequena Escala no Centro e Norte de Moçambique.
Provedor de dados: 31
Autores: Equipe Tecnica do SIMA.
Resultados das Investigações do SIMA-Dest e Departamento de Análise de Políticas MADER-Direcção de Economia
Tipo: Report
Palavras-chave: Food security; Food policy; Mozambique; Food Security and Poverty; Marketing; Q18.
Ano: 2005
URL: http://purl.umn.edu/55247

Quebramento do colmo em milho.
Provedor de dados: 14
Autores: MAGALHAES, P. C.; MAGNAVACA, R.; OLIVEIRA, A. C. de.
bitstream/item/30639/1/Pesq.And.-7.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Quebramento; Acamamento; Maize.; Colmo; Milho; Zea Mays.; Lodging.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/478748

Quem Come Milho Amarelo? Alguns Resultados Preliminares de um Inquérito sobre as Preferências dos Consumidores de Farinha de Milho na Cidade de Maputo
Provedor de dados: 31
Ministry of Agriculture and Rural Development, Directorate of Economics, Republic of Mozambique
Tipo: Working or Discussion Paper
Palavras-chave: Food security; Food policy; Mozambique; Maize; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Q18.
Ano: 1994
URL: http://purl.umn.edu/56018

Quinoa (Chenopodium quinoa) reaction to herbicide residue in a Brazilian Savannah soil
Provedor de dados: 86
Autores: Santos,Roberto Lorena de Barros; Spehar,Carlos Roberto; Vivaldi,Lucio.
The quinoa (Chenopodium quinoa Willd.) cultivation, one of the most promising in double cropping with soybeans or maize, depends on weed control. The objective of this work was to evaluate quinoa reaction to herbicide residue in a savannah soil. Six herbicide treatments, trifluralin, pendimethalin, clomazone, imazaquin, trifluralin + imazaquin and control, were applied, prior to summer cultivation of soybean, in a Dark-Red Latosol (typic Haplustox). Soybean cultivar BR 9 Savana was grown and soil samples were collected at 15, 38, 100, 145 and 206 days after treatment and stored at -5ºC. Bioassays were conducted in greenhouse, using quinoa, cultivar Q18. Imazaquin was the most harmful to quinoa seedlings, up to 206 days after application, followed by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chenopod; Weed control; Toxicity; Yields.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000600014

Radiation use range and corn starch in conservation leaves post-harvest cabbage butter
Provedor de dados: 22
Autores: Sanches, Alex Guimarães; Silva, Maryelle Barros da; Moreira, Elaine Gleice Silva; Costa, Jaqueline Macedo; Cordeiro, Carlos Alberto Martins.
Due to the high perishability presented by the leaves of kale after harvest this study is to evaluate the single and combined effect of different conservation techniques in the prolongation of life. The experiment was set up in factorial 4x9 with five replicates the physical, chemical and sensory parameters were evaluated every two days on the chlorophyll content and activity of enzymes POD and PPO, soluble solids, pH, titratable acidity, loss of weight, wilting, flavor and overall quality. According to the results there was a significant interaction in all parameters evaluated. The use of corn starch (T3) in isolated form showed similar results (T1) in the same way that the combined effect of corn starch and gamma radiation (T4) did not differ when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica oleracea L. var. acephala; Conservation; Vegetable.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/13713

Ranking matrices as operational tools for the environmental risk assessment of genetically modified crops on non-target organisms
Provedor de dados: 21
Autores: Hilbeck, Angelika; Weiss, Gabriele; Oehen, Bernadette; Römbke, Jörg; Jänsch, Stephan; Teichmann, Hanka; Lang, Andreas; Otto, Mathias; Tappeser, Beatrix.
For the operationalization of the structured, stepwise selection procedure for non-target testing organisms integrated into the new EFSA guidelines for environmental risk assessment of GM plants practicaltools – i.e. ranking matrices – were developed. These tools – some of them are new and some are refinedfrom older ones – were tested using the GM case crop of TC 1507 maize. The selection procedure consists of six steps. The strategy builds on identifying the important ecological functions for the particularcropping system and compiling a species lists according to their ecological functions and presence inthe specific receiving environments. Subsequently, the species numbers are reduced in a systematic,stepwise fashion to a relevant and practical number...
Tipo: Journal paper
Palavras-chave: Breeding; Genetics and propagation Environmental aspects.
Ano: 2014
URL: http://orgprints.org/25738/6/Hilbeck%20et%20al2013.pdf

Rapid metabolic adaptation in European sea bass (Dicentrarchus labrax) juveniles fed different carbohydrate sources after heat shock stress
Provedor de dados: 5
Autores: Enes, P; Panserat, S; Kaushik, Sadasivam; Oliva Teles, A.
A study was conducted to evaluate the effect of two dietary carbohydrate sources (waxy maize starch and glucose) on the metabolic adaptation of sea bass juveniles (initial weight: 24 g) to a heat shock treatment (temperature rise from 18 degrees C to 25 degrees C within 24 h). Two isonitrogenous and isolipidic diets were fon-nulated to contain 20% waxy maize starch (WS diet) or 20% glucose (GLU diet). Triplicate groups of fish were fed to near satiation for 4 weeks at both temperatures (18 degrees C and 25 degrees C). Then, fish previously maintained at 18 degrees C were submitted to a heat shock (18 degrees C to 25 degrees C) and continued to be fed with the same diets during I more week. The higher water temperature significantly improved growth...
Tipo: Text
Palavras-chave: Waxy maize starch; Temperature; Lipogenic enzymes; HSP70; Glycolytic enzymes; Glucose; Gluconeogenic enzymes; European sea bass; Carbohydrate utilization; Biomarker.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-6958.pdf

Rapid screening for aluminum tolerance in maize (Zea mays L.)
Provedor de dados: 74
Autores: Giaveno,Carlos Daniel; Miranda Filho,José B.
A significant decrease in maize grain yield due to aluminum toxicity is considered to be one of the most important agricultural problems for tropical regions. Genetic improvement is a useful approach to increase maize yield in acid soils, but this requires a rapid and reliable method to discriminate between genotypes. In our work we investigated the feasibility of using hematoxylin staining (HS) to detect Al-tolerant plants at the seedling stage. The original population along with two populations obtained after one cycle of divergent selection were evaluated by net root growth (NRG) and HS after 7 days in nutrient solution. Results showed a negative correlation between NRG and HS in all populations, in which sensitive plants, characterized by low NRG,...
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400024

Rationalization and Harmonization of Seed Policies and Regulations in Eastern and Central Africa: Effecting Policy Change through Private Public Partnerships
Provedor de dados: 31
Autores: Minde,   Isaac J.; Waithaka,   Michael M.
Cereal grains are important staple foods in Africa but yields are still too low at 1.5 tons per ha for maize while compared with a global average of 4.5 tons per ha. This can be partly attributed to limited development of commercial seed markets, low use of improved seeds, small and highly fragmented seed markets. Many released varieties are not widely disseminated due to closed national markets dominated by a few international companies and parastatals, and restrictive laws, regulations and policies. Transactions costs within and across national boundaries are high because of differing arrangements across countries. Establishment of common regulatory structures is expected to reduce transactions costs and promote increased trade and hence use of improved...
Tipo: Conference Paper or Presentation
Palavras-chave: Seeds; Harmonization; Public-private partnerships; Eastern Africa; Crop Production/Industries; Q18; Q19.
Ano: 2006
URL: http://purl.umn.edu/25703

Reação de cultivares de milho (Zea mays L.) ao nematóide de galhas (Meloidogyne javanica (Treub) Chitwood).
Provedor de dados: 14
Autores: ASMUS, G. L.; ANDRADE, P. J. M.
bitstream/item/38992/1/PA-1-1995.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Cultivar; Reacao; Nematoide de galha; Maize; Variety; Reaction; Nematode.; Meloidogyne Javanica; Milho; Zea Mays.; Corn.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/237333

Reação do solo e disponibilidade de micronutrientes, em solo de textura média, tratado com lodo de esgoto e cultivado com milho - DOI: 10.4025/actasciagron.v30i4.5320
Provedor de dados: 1
Autores: Pigozzo, Ana Tereza Jordão; UNESP; Lenzi, Ervim; UEM; Luca Júnior, Jorge de; UNESP; Scapim, Carlos Alberto; UEM; Vidigal Filho, Pedro Soares; UEM; Costa, Antônio Carlos Saraiva da; UEM.
A avaliação da disponibilidade de micronutrientes pela aplicação de lodo de esgoto foi realizada em campo, para uma safra de milho, em um Latossolo Vermelho distrófico, LVd, de textura média. O delineamento experimental foi de blocos casualizados, com os tratamentos em esquema de parcelas subdivididas, no tempo, sorteados, na parcela, seis doses de lodo de esgoto e, nas subparcelas, as cinco épocas de coleta de solo, com quatro repetições. O lodo de esgoto foi aplicado e incorporado na superfície (0-20 cm). Foram determinados os micronutrientes Fe, Mn, Cu e Zn, nas amostras de solo, e das plantas de milho. No solo, foram extraídas as amostras com solução de DTPA (ácido dietilenotriaminopentaacético) e nas plantas, mediante a digestão nitro-perclórica. A...
Palavras-chave: 5.01.00.00-9    Agronomia lodo de esgoto; Disponibilidade de micronutrientes; Milho; Solo tropical. sewage sludge; Micronutrient availability; Maize; Tropical soil.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5320

Reactions of corn varieties to downy mildew (Sclerospora Spp.)
Provedor de dados: 106
Autores: Somkiat Titatarn; Sahas Tansawasd; Pradit Govittawawong; Prasert Kengpiem; Niyom Chew-Chin.
1 table
Palavras-chave: Corn; Maize; Varieties; Downy mildew; Sclerospora; Disease resistance; ข้าวโพด; โรคราน้ำค้าง.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3873

Recent studies on the chemical control of Patanga attacking corn in Thailand
Provedor de dados: 106
Autores: Ratanawaraha, C.; Pojananuwong, S.; Sucharit, R.; Rumakom, M.
4 ill.
Palavras-chave: Corn; Maize; Patanga; Chemical control; Thailand; ข้าวโพด; ตั๊กแตนปาทังก้า; ประเทศไทย.
Ano: 1972
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3909

Reciprocal recurrent selection effects on the genetic structure of tropical maize populations assessed at microsatellite loci
Provedor de dados: 74
Autores: Pinto,Luciana Rossini; Vieira,Maria Lucia Carneiro; Souza Jr.,Claudio Lopes de; Souza,Anete Pereira de.
A modified reciprocal recurrent selection (RRS) method, which employed one cycle of high-intensity selection, was applied to two tropical maize (Zea mays L.) populations, BR-105 and BR-106, originating the improved synthetics IG-3 and IG-4, respectively. In the present study the effects of this kind of selection on the genetic structure of these populations and their synthetics were investigated at 30 microsatellite (SSR) loci. A total of 125 alleles were revealed. A reduction in the number of alleles was observed after selection, as well as changes in allele frequencies. In nearly 13% (BR-105) and 7% (BR-106) of the loci evaluated, the changes in allele frequencies were not explained, exclusively due to the effects of genetic drift. The effective...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Population genetics; Plant breeding; Molecular markers.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000300022

Recomendacao de datas para o plantio de milho (Zea mays) na regiao Sudoeste do estado da Bahia.
Provedor de dados: 14
Autores: EVANGELISTA, B. A.; ASSAD, E. D.; SANS, L. M. A.
bitstream/item/99496/1/comtec-13.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Bahia; Brasil; Agroclimatic zones; Maize.; Cerrado; Época de Semeadura; Milho; Plantio; Zea Mays; Zoneamento Climático.; Brazil; Planting; Sowing date.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546483

Recomendacao de datas para o plantio de milho (Zea mays) na regiao Sul do estado do Maranhao e microrregiao Chapadinha.
Provedor de dados: 14
Autores: EVANGELISTA, B. A.; ASSAD, E. D.; AGUIAR, L. M. S.
bitstream/item/99599/1/comtec-16.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maranhao; Chapadinha; Brasil; Maize; Agroclimatic zones.; Cerrado; Época de Semeadura; Milho; Plantio; Zoneamento Climático.; Zea Mays; Brazil; Planting; Sowing date.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546486

Recomendacao de datas para o plantio de milho (Zea mays) na regiao Sul do estado do Piaui.
Provedor de dados: 14
Autores: ASSAD, E. D.; FEITOZA, L.; EVANGELISTA, B. A.
bitstream/item/99602/1/comtec-19.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize; Piaui; Brasil; Agroclimatic zones.; Cerrado; Época de Semeadura; Milho; Plantio; Zoneamento Climático.; Zea Mays; Brazil; Planting; Sowing date.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546489

Recomendacao de datas para o plantio de milho (Zea mays) no estado do Rio de Janeiro.
Provedor de dados: 14
Autores: HISSA, H. R.; EVANGELISTA, B. A.; ASSAD, E. D.
bitstream/item/99605/1/comtec-21.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Maize; Rio de Janeiro; Brasil; Agroclimatic zones.; Cerrado; Época de Semeadura; Milho; Plantio; Zoneamento Climático.; Zea Mays; Brazil; Planting; Sowing date.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546491

Recomendações básicas para o cultivo do milho no Estado do Pará.
Provedor de dados: 14
Autores: SOUZA, F. R. S. de; VELOSO, C. A. C.; POLTRONIERI, L. S.; ARAUJO, S. M. B. de.
bitstream/item/34526/1/ORIENTAL-CirTec2.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cultivo; Maize; Cultivation; Processing.; Armazenamento; Beneficiamento; Colheita; Custo de Produção; Milho.; Harvesting; Production costs; Storage.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377262

Recomendações para o manejo de doenças do milho disseminadas por insetos-vetores.
Provedor de dados: 14
Autores: SABATO, E. de O.; LANDAU, E. C.; OLIVEIRA, C. M. de.
As doenças do milho disseminadas por insetos-vetores são os enfezamentos causados pelos molicutes espiroplasma e fitoplasma, e as viroses. Entre os insetos-vetores importantes para essa cultura, destacam-se a cigarrinha Dalbulus maidis , que transmite o espiroplasma, o fitoplasma e o vírus da risca (Maize rayado fino virus ), e os pulgões, que transmitem os vírus que causam o mosaico-comum-do-milho. A virose denominada faixa-clorótica-das-nervuras, cujo vírus agente causal é transmitido pela cigarrinha Peregrinus maidis , também ocorre no milho no Brasil, porém de forma esporádica, em baixos níveis de incidência. Os enfezamentos por molicutes e a virose mosaico-comum, eventualmente, têm ocorrido em surtos epidêmicos, causando danos expressivos e, por isso,...
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Praga de planta; Cigarrinha; Pulgão; Plant pests.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1012084

Recomendações para o planejamento e análise de experimentos com as culturas de milho e feijão consorciadas.
Provedor de dados: 14
Autores: RAMALHO, M. A. P.; OLIVEIRA, A. C. de; GARCIA, J. C.
Terminologia e sistemas de consorciacao milho-feijao utilizados no Brasil; Delineamentos experimentais e analise estatistica; Identificacao de cultivares de milho e feijao para o sistema associado; analise economica de experimentos sobre a consorciacao milho-feijao.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Consorciacao; Maize; Bean.; Feijão; Milho.; Corn; Intercropping.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/472816

Recomendacoes para o uso de corretivos e fertilizantes em milho no Estado de Minas Gerais.
Provedor de dados: 14
Autores: ALVES, V. M. C.; VASCONCELLOS, C. A.; PITTA, G. V. E.; FRANCA, G. E.; FREIRE, F. M.; RODRIGUES FILHO, A.; ARAUJO, J. M. de; VIEIRA, J. R.; LOUREIRO, J. E.
bitstream/item/30333/1/ct-18.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Minas Gerais; Brasil; Maize; Corrective dressing.; Corretivo; Fertilizante; Milho; Zea Mays.; Fertilizers.; Brazil.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/484425

RECOMENDAÇÕES técnicas para a cultura do milho.
Provedor de dados: 14
Preparo do solo; Semeadura; Controle de plantas daninhas; Calagem e adubação; Recomendação de cultivares; Pragas de importância econômica; Principais doenças; Manejo de água; Colheita; Armazenamento; Comercialização; Coeficientes técnicos.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cultura; Maize; Culture.; Milho.; Corn.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/472808

Recomendações técnicas para controle das principais pragas da cultura do milho em Roraima.
Provedor de dados: 14
Autores: MOREIRA, M. A. B.
bitstream/item/175390/1/cot00798-milhomar.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Controle; Brasil; Roraima; Maize.; Milho; Praga.; Brazil; Insect control.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/688478

RECOMENDAÇÕES técnicas para o cultivo de milho.
Provedor de dados: 14
Métodos culturais; Adubação e calagem; Cultivares de milho para o Brasil; Secagem e Armazenamento; Comercialização.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cultivo; Maize; Production system.; Milho; Sistema de Produção.; Corn.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/472807

Recomendacoes tecnicas para o cultivo de milho e de macunde (caupi) em Sao Tome e Principe.
Provedor de dados: 14
Autores: EMBRAPA. Centro de Pesquisa Agropecuaria dos Cerrados (Planaltina, DF).
bitstream/item/107020/1/doc-11.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Caupi; Macunde; Cultivo; Recomendacao tecnica; Sao Tome e Principe; Savana; Maize; Cultivation.; Feijão de Corda; Milho; Zea Mays.; Vigna Unguiculata; Africa; Savannas; Tropical rain forests.
Ano: 1984
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/549453

RECOMENDAÇÕES técnicas para o cultivo do milho.
Provedor de dados: 14
Semeadura do milho; Controle de plantas daninhas; Consorciacao milho-feijao; Adubacao e calagem; Cultivares de milho para o Brasil; Principais pragas da cultura do milho; Armazenamento; Comercializacao.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cultivo; Maize.; Milho; Zea Mays.; Crops.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/476553

RECOMENDAÇÕES técnicas para o cultivo do milho.
Provedor de dados: 14
Cultivares de milho; Semeadura do milho; Consorcio milho-feijao; Controle de plantas daninhas; Adubacao e calagem; Selecao de equipamentos agricolas; Principais pragas da cultura do milho; Doencas da cultura do milho; Colheita mecanica do milho; Armazenamento; Comercializacao.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cultivo; Recomendacoes tecnicas; Maize; Production system; Technical information.; Milho; Sistema de Produção.; Corn.
Ano: 1987
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/472367

Recomendações técnicas para o cultivo do milho nos Tabuleiros Costeiros do Nordeste Brasileiro.
Provedor de dados: 14
Autores: CARVALHO, H. W. L. de; LEAL, M. de L. da S.; SANTOS, M. X. dos; DONALD, E. R. C.
Milho: Consumo regional; Preparo do solo; Calagem e Adubacao; Sementes; Variedades; Hibridos; Plantio; Epoca, profundidade, espacamento; Controle das Plantas daninhas; Controle pragas; Armazenamento.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Cultivo; Planta daninha; Tabuleiros Costeiros; Maize; Cultivation.; Adubação; Calagem; Armazenamento; Colheita; Milho; Plantio; Praga; Semente; Zea Mays.; Solo; Harvesting; Fertilizer application; Liming; Pests; Storage; Seeds; Soil; Weeds.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/371080

Recycling and Assessment of Struvite Phosphorus from Sewage Sludge
Provedor de dados: 111
Autores: Juergen Kern; ATB; Bernd Heinzmann; BWB; Bennar Markus; HU Berlin; Anne Catherine Kaufmann; HU Berlin; Nathalie Soethe; HU Berlin; Christof Engels; HU Berlin.
AbstractThis study presents an integrated approach for the recovery of P from the wastewater path. Since natural P sources are limited, recycling processes are making an increasingly important contribution to meeting the nutritional requirements of plant production. The groundwork for developing a new fertilizer from upgraded sewage sludge includes an evaluation of nutrients and heavy metal contents. Struvite (NH4MgPO4 • 6 H2O) derived from sewage sludge had a total P content of 6.1% with 3.5% being water-soluble. Plant availability was tested in pot experiments with wheat and maize. P uptake rates were 66.7% and 85.9%, respectively. In terms of heavy metal contents, struvite showed contaminant levels at least three times below the limiting values of the...
Ano: 1969
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/1071

Recycling Hybrid Maize Varieties: Is It Backward Practice or Innovative Response to Adverse Conditions in Kenya?
Provedor de dados: 31
Autores: Japhether,   W.; De Groote,   Hugo; Lawrence,   M.; Danda,   Milton Kengo; Mohammed,   Lutta.
Hybrid varieties have significantly contributed to increased maize proclivity in Kenya and other SSA countries. A number of factors limit access of farmers to maize varieties, smallholder farmers have sort an alternative option of recycling the hybrid maize seeds. Seeds are carefully selected based on cob and grain size during or before harvest after which they are preserved. hybrid yielding maize varieties (HYMV) developers and disseminators observe that there is a progressive yield decrease of recycling HYMV. The question is ‘Is it economical to recycle HYMV or an innovation that farmers can practice?’. This study was designed to evaluate the yield losses and benefits of hybrid maize recycling in Kenya. Through key informants, farmers who grew both...
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries.
Ano: 2006
URL: http://purl.umn.edu/25726

Recycling Phosphor Düngemittel für den Ökologischen Landbau
Provedor de dados: 21
Autores: Wollmann, Iris; Möller, Kurt.
Phosphorus is an essential, non-substitutable nutrient for all living organisms, and global resources are getting depleted. Cycling of nutrients is a main principle in organic farming, which can make P fertilizers recycled from sewage sludge a suitable alternative. Several Recycling P fertilizers from sewage sludge processing, combined with two different Bioeffector products, were investigated for their P availability in pot experiments with red clover and maize. No significant effects could be shown due to Bioeffector applications. Promising effects of Recycling P-fertilizers could be shown concerning dry matter and plant P-uptake for both maize and red clover. Treatments with struvite reached values comparable with the superphosphate control while sewage...
Tipo: Conference paper, poster, etc.
Palavras-chave: "Organics" in general; Nutrient turnover; Crop husbandry.
Ano: 2015
URL: http://orgprints.org/27194/1/27194_wollmann.pdf

Red de valor para maíz con alta calidad de proteína.
Provedor de dados: 32
Autores: Domínguez Mercado, Claudia Alejandra.
En México el retardo en el crecimiento (RC) afecta a más del 15% de los niños menores de cinco años, consecuencia de la desnutrición o malnutrición en  niños y madres gestantes y lactantes. El maíz es el cereal más importante a nivel mundial; en México, constituye la base de la alimentación y principal fuente de energía y proteínas. Sin embargo, su proteína es deficiente en aminoácidos esenciales relacionados directamente con el desarrollo físico. El maíz con alta calidad de proteína, descubierto en los años 60’s, es una alternativa para disminuir los índices de RC dado que contiene hasta un 90% más de aminoácidos esenciales. La presente investigación busca demostrar la posibilidad de formar una red de valor para maíz con alta calidad de proteína; con este...
Palavras-chave: Zea mays; Maíz QPM; Retardo en el crecimiento; Red de valor; Quality protein maize; Stunting; Value network; Producción de semillas; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1715

Redistribución del carbono orgánico en diferentes manejos agrícolas y su efecto en la estructuración del suelo
Provedor de dados: 32
Autores: García Favela, Braulio.
El uso del suelo y las prácticas de manejo afectan el balance entre la materia  orgánica lábil y la estable en la superficie del suelo, el contenido de carbono  orgánico total y el carbono dentro de las diferentes fracciones de agregados,  provocando variación en las propiedades físicas, químicas y biológicas. Cuando un  suelo es cultivado (arado, barbechado, etc.), la capa superficial es mezclada y en  áreas de cultivo intenso es fuertemente homogenizada, esto pueden influir en la  distribución del carbono orgánico del suelo (COS) significativamente. El  conocimiento del manejo adecuado del suelo y su influencia en la pérdida o  acumulación del COS es una herramienta importante que nos permitiría mantener su  productividad a largo plazo acompañado de...
Tipo: Tesis
Palavras-chave: Maestría; Edafología.
Ano: 2008
URL: http://hdl.handle.net/10521/1501

Reduced tillage in temperate organic farming: implications for crop management and forage production
Provedor de dados: 21
Autores: Krauss, Maike; Berner, Alfred; Burger, Dieter; Wiemken, Andres; Niggli, Urs; Mäder, Paul.
To promote conservation tillage in organic farming systems, weed control and ley removal within arable-ley rotations need to be optimized. A long-term field trial was thus established in Frick, Switzerland in 2002 on a clayey soil and with a mean precipitation of 1000 mm⁄ year. The tillage experiment distinguished between conventional tillage with mouldboard ploughing (CT, 15 cm depth) and reduced tillage (RT), including a chisel plough (15 cm) and a stubble cleaner (5 cm). Results of a 2-year grass-clover ley (2006 ⁄ 2007) and silage maize (2008) are presented. Due to dry conditions, mean grass-clover yields were 25% higher in RT than in CT, indicating better water retention of RT soils. Clover cover and mineral contents of the fodder mixture were also...
Tipo: Journal paper
Palavras-chave: Pasture and forage crops; Crop combinations and interactions; Weed management; Soil; Soil biology; Soil tillage.
Ano: 2010
URL: http://orgprints.org/16810/1/Krauss_etal_2010_Red_Till_in_Temperate_organic_farming.pdf

Reductions of Agricultural Nitrogen Use Under Consideration of Production and Price Risks
Provedor de dados: 31
Autores: Finger,   Robert.
Production and price risks affect optimal nitrogen use as well as the effects of nitrogen taxation if farmers’ risk aversion is taken into account. Our empirical analysis for Swiss maize production shows that risk-aversion leads to lower levels of nitrogen application, and nitrogen taxes lead to higher reductions of nitrogen use for risk-averse than for risk-neutral farmers. Moreover, risk-averse farmers face lower abatement costs. Sensitivity analyses, that consider expected shocks in price and yield variability in Swiss maize production, show that these differences between risk-averse and risk-neutral farmers will increase further. Thus, agricultural policies should consider farmers’ risk-preferences as well as potential increases in farmers’ income risks.
Tipo: Conference Paper or Presentation
Palavras-chave: Crop Production/Industries; Risk and Uncertainty.
Ano: 2011
URL: http://purl.umn.edu/114356

Reduktion des Unkrautdruckes durch die Etablierung von Untersaaten in Mais-Bohnen-Gemengen
Provedor de dados: 21
Autores: Fischer, Jenny; Böhm, Herwart.
Am Thünen-Institut für Ökologischen Landbau (Schleswig-Holstein, sL, 740 mm, 8,7°C) werden von 2014-2016 Parzellenversuche zum Gemengeanbau von Mais mit Phaseolus-Bohnen durchgeführt. In vorangegangen Versuchen hat sich gezeigt, dass Mais und Bohnen infolge der langsamen Jugendentwicklung nur eine sehr geringe Konkurrenzkraft gegenüber Unkräutern aufweisen. Daher erfolgt die Aussaat der Bohnen erst nach Abschluss der mechanischen Unkrautbekämpfung mit Striegel und Hacke, zum 4-Blattstadium (BBCH 14) des Maises. Da mechanische Unkrautbekämpfungsmaßnahmen nach der Aussaat der Bohnen kaum durchgeführt werden können, wird in einem Untersaatenversuch geprüft, ob die Etablierung einer zusätzlichen Untersaat den Unkrautdruck im Gemenge nachhaltig reduzieren kann....
Tipo: Conference paper, poster, etc.
Palavras-chave: Crop combinations and interactions; Weed management.
Ano: 2016
URL: http://orgprints.org/31121/1/Fischer-B%C3%B6hm_2016_JKA452_Mais-Bohne-Untersaat.pdf

Re-evaluation of manganese solubility as affected by soil sample preparation in the laboratory
Provedor de dados: 52
Autores: Andrade,Emilene; Miyazawa,Mário; Pavan,Marcos Antonio; Oliveira,Edson Lima de.
Laboratory experiments were conducted to re-evaluate the effects of drying and the time between drying and Mn analysis on soil Mn solubility using maize seedlings as test plant. Samples of five soil types were collected in the field, transferred to laboratory and submitted for the following treatments: dried in the shade at 25ºC and dried at 65ºC followed by Mn determination immediately and after 30 and 60 days. Ninety days later soil samples were rewetted at field capacity and maize seedlings were grown for 7 days. Evaluations included plant Mn content and soil Mn extracted with NH4OAc 1 mol L-1 pH 7. The lowest soil and plant Mn contents were found in soil samples dried in the shade at 25ºC. Drying soil sample at 65ºC and increasing the time between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Micronutrient; Transition metal; Soil analysis.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500017

Regeneração e multiplicação de germoplasma de milho (Zea mays L.) na Região Amazônica.
Provedor de dados: 14
Autores: SOUZA, F. R. S. de; ANDRADE, R. V. de; CORREA, J. R. V.
bitstream/item/57469/1/CPATU-PA204.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Brasil; Maize; Regeneration.; Germoplasma; Milho; Regeneração.; Amazonia; Germplasm.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376604

Regime shifts and technology diffusion in crop yield growth paths with an application to maize yields in Zimbabwe
Provedor de dados: 31
Autores: Myers,   Robert J.; Jayne,   Thomas S.
An alternative specification for the trend component of crop yield growth is developed and applied to maize yield data for Zimbabwe’s large‐scale farming sector. This accounts for permanent regime shifts as new technologies are discovered but allows gradual absorption as adoption follows a diffusion path. Econometric methods are used to estimate the timing and importance of innovations, as well as the length of the diffusion path. Results from an application to Zimbabwe commercial maize yields indicate two major regime shifts that can be associated with the introduction of hybrid seed varieties, and a diffusion path that extends over a decade.
Tipo: Journal Article
Palavras-chave: Crop Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/118043

Regional corn varietal trials
Provedor de dados: 106
Autores: Chalaw Chawanapong; Prakob Jan-aram; Sakol Petchmanee; Prasop Depyasuvarn; Somsri Thaiwesna; Chanika Patamadilok; Kemchart Chaiyarat; Chamnan Chutkaew; Vichitr Benjasil.
32 tables
Palavras-chave: Corn; Maize; Regional trials; Varietal trials; Yields; Agronomic characters; ข้าวฟ่าง; การทดสอบพันธุ์ในหลายท้องที่; การทดสอบพันธุ์.
Ano: 1979
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3987

Regional corn varietal trials
Provedor de dados: 106
Autores: Chalaw Chawanapong; Prakob Jan-aram; Teerasak Manupeerapan; Sakol Petchmanee; Prasop Depyasuvarn; Semsri Thaiwesna; Chanika Patamadilok; Kemchart Chaiyarat; Vichit Benjasil.
6 tables
Palavras-chave: Corn; Maize; Regional trials; Varietal trials; Variety trials; Yields; Quality; Agronomic characters; ข้าวโพด; การทดสอบพันธุ์ในหลายท้องที่; การทดสอบพันธุ์; ผลผลิต.
Ano: 1980
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4010

Regional corn variety test
Provedor de dados: 106
Autores: Chalaw Chawanapong; Julee Tippayaruk; Chawatipol Ratanakupt; Chawana Boonreung; Somrak Noradechanon; Teerasak Manupeerapan; Sirichai Unsrisong; Prakob Jan-aram; Chamnan Chutkaew; Ampol Senanarong.
14 tables
Palavras-chave: Corn; Maize; Variety trials; Regional trials; Varieties; Yields; ข้าวโพด; การทดสอบพันธุ์; การทดสอบพันธุ์ในหลายท้องที่.
Ano: 1976
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3851

Regional corn variety test
Provedor de dados: 106
Autores: Chalaw Chawanapong; Chawatipol Ratanakupt; Prakob Jan-aram; Narongsak Senanarong; Chawana Boonreung; Prasop Depyasuvarn; Ampol Senanarong.
8 tables
Palavras-chave: Corn; Maize; Regional test; Variety test; Varieties; Yields; ข้าวโพด; การทดสอบพันธุ์ในหลายท้องที่; การทดสอบสายพันธุ์.
Ano: 1975
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3832

Regional corn variety test
Provedor de dados: 106
Autores: Chalaw Chawanapong.
12 tables
Palavras-chave: Corn; Maize; Variety trials; Regional trials; Varieties; Yields; Agronomic characters; ข้าวโพด; การทดสอบพันธุ์; โรคราน้ำค้าง; การทดสอบปุ๋ย; การทดสอบผลผลิตในหลายท้องที่.
Ano: 1977
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3938

Regional testing
Provedor de dados: 106
1 ill., 23 tables
Palavras-chave: Corn; Maize; Sorghum; Variety testing; Regional testing; Varieties; Variety trials; Growth; Yields; ข้าวโพด; ข้าวฟ่าง; การทดสอบพันธุ์; การทดสอบพันธุ์ในหลายท้องที่.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3797

Regional testing program for downy mildew of maize
Provedor de dados: 106
3 tables
Palavras-chave: Corn; Maize; Downy mildew; Regional testing; Varieties; Variety trials; Disease resistance; ข้าวโพด; โรคราน้ำค้าง; การทดสอบพันธุ์ในหลายท้องที่.
Ano: 1974
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3802

Regional Trade in Maize in Southern Africa: Examining the Experience of Northern Mozambique and Malawi
Provedor de dados: 31
Autores: Arlindo,   Pedro; Tschirley,   David L.
Tipo: Working or Discussion Paper
Palavras-chave: Crop Production/Industries; Marketing; Downloads October 2008-June 2009: 5.
Ano: 2003
URL: http://purl.umn.edu/11429

Regulation of the expression of NADP-malic enzyme by UV-B, red and far-red light in maize seedlings
Provedor de dados: 56
Autores: Casati,P.; Drincovich,M.F.; Edwards,G.E.; Andreo,C.S.
The induction of nicotinamide adenine dinucleotide phosphate-malic enzyme (NADP-ME) in etiolated maize (Zea mays) seedlings by UV-B and UV-A radiation, and different levels of photosynthetically active radiation (PAR, 400-700 nm) was investigated by measuring changes in activity, protein quantity and RNA levels as a function of intensity and duration of exposure to the different radiations. Under low levels of PAR, exposure to UV-B radiation but not UV-A radiation for 6 to 24 h caused a marked increase in the enzyme levels similar to that observed under high PAR in the absence of UV-B. UV-B treatment of green leaves following a 12-h dark period also caused an increase in NADP-ME expression. Exposure to UV-B radiation for only 5 min resulted in a rapid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C4 photosynthesis; NADP-malic enzyme; UV-B radiation; Photosynthesis; Red light; Far-red light.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000002

Relación precipitación-escurrimiento para diferentes sistemas de manejo del suelo
Provedor de dados: 32
Autores: Canaca Calderón,  Ramón León.
Se evaluó la relación precipitación-escurrimiento en diferentes sistemas de manejo del suelo en  el cultivo de maíz en dos regiones de la República Mexicana: la localidad de Ajuno, municipio  de Pátzcuaro, Michoacán y la localidad Vistahermosa, municipio de San Andrés Tuxtla,  Veracruz. Se utilizaron bases de datos de precipitación y escurrimiento para los meses de junio a  octubre del periodo de 1996-2001, cuyos datos fueron obtenidos en lotes de escurrimiento de  22.9 m x 4 m con pendiente de 10% para Ajuno y de 25 m x 2 m con 16% de pendiente para  Vistahermosa. Se analizaron los factores que inciden en los escurrimientos superficiales como  son  las propiedades hidrológicas del suelo, condición hidrológica asociada a la cobertura  vegetal, uso de suelo...
Tipo: Tesis
Palavras-chave: Propiedades hidrológicas; Multitemporal; Coeficiente; Curva numérica; Abstracción inicial; Maestría; Hidrociencias; Hydrologic properties; Multitemporal; Coefficient; Curve number; Initial abstraction.
Ano: 2008
URL: http://hdl.handle.net/10521/1312

Relações de troca com efeito tecnológico no mercado doméstico de arroz, milho, café e soja
Provedor de dados: 31
Autores: Ponciano,   Niraldo Jose; Souza,   Paulo Marcelo de; Mata,   Henrique Tome Da Costa; Detmann,   Edenio.
The objective of this work was to evaluate, by means of the exchange rate, the profitability of two products directed toward the domestic market and two export products. Other objective was to identify productivity growth compensated the decrease of prices. The geometric rates of the production, area and productivity growth were estimated. The exchange rate was estimated by the relation between the index of the inputs prices and the index of the product prices. The results show a great trend of deterioration of the exchange terms for all the analyzed products. Evidenced that these effects more was been accented for rice and maize. Such behavior associates it the fact of the rice cultures and of maize to be destined to the domestic market, its demands have...
Tipo: Journal Article
Palavras-chave: Terms of exchange; Grains; Inputs; Prices; Productivity; Income; Productivity Analysis.
Ano: 2007
URL: http://purl.umn.edu/54598

Relating N2O emissions from energy crops to the avoided fossil fuel-derived CO2 – a study on bioethanol and biogas produced from organically managed maize, rye, vetch and grass-clover
Provedor de dados: 21
Autores: Carter, Mette S.; Hauggaard-Nielsen, Henrik; Thomsen, Sune T.; Heiske, Stefan; Jensen, Morten; Schmidt, Jens Ejbye; Johansen, Anders; Ambus, Per.
Field emissions of N2O during cultivation of bioenergy crops may counterbalance a considerable part of the avoided fossil CO2 emissions that are achieved by fossil fuel displacement.
Tipo: Conference paper, poster, etc.
Palavras-chave: Nutrient turnover; Air and water emissions.
Ano: 2010
URL: http://orgprints.org/18329/4/18329.pdf

Relation of response between a plant and its selfed progeny to rust (Puccinia polysora) inoculation
Provedor de dados: 106
Autores: Park, Keun Yong.
3 tables
Palavras-chave: Corn; Maize; Selfed progeny; Parental plant; Rusts; Puccinia polysora; Disease resistance; ข้าวโพด; โรคราสนิม; รุ่นลูกที่ได้จากการผสมตัวเอง.
Ano: 1971
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3773

Relationship between heterosis and genetic divergence for phosphorus use efficiency and its components in tropical maize
Provedor de dados: 65
Autores: Caixeta,Débora Santos; Fritsche-Neto,Roberto; Batista,Lorena Guimarães; Carvalho,Humberto Fanelli; DoVale,Júlio César; Lanes,Éder Cristian Malta de; Miranda,Glauco Vieira.
The objective of this study was to determine the relationship between heterosis and genetic divergence for phosphorus use efficiency (PUE) in tropical maize. It was used two groups of genitors, each consisting of seven lines, contrasting with each other in the nitrogen and phosphorus use efficiency. It was obtained 41 hybrid combinations between these groups, which were evaluated in low phosphorus. Randomized complete block design with two replications was used. For obtaining the components of variance and the breeding values were used REML/BLUP method. In the genotyping of the parental lines were used 80 microsatellite markers. Through the correlation between genetic distance obtained by the markers and specific combining ability it was not possible to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dissimilarity; Abiotic stress; Molecular markers; Combining ability.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000100011

Relationship between manganese toxicity and waterlogging tolerance in Zea mays L. cv. Saracura
Provedor de dados: 1
Autores: Silva, Dayane Meireles da; Fonte, Nathalia dos Santos da; Souza, Kamila Rezende Dázio de; Rodrigues-Brandão, Isabel; Libeck, Ian Teodoro; Alves, Jose Donizeti.
The objective of this study was to evaluate the relationship between excess manganese and waterlogging tolerance in 18th selection cycle Zea mays L. cv. Saracura plants. Maize plants were transferred to plastic receptacles containing solutions with different concentrations of manganese. Leaves and roots were evaluated at the beginning of treatment and after 7, 14, and 21 days for chlorophyll content, biomass production and antioxidant metabolism. Mn was strongly translocated from the roots to the leaves, triggering a decrease in chlorophyll content. Excess Mn promoted an increase in reactive oxygen species that was accompanied by higher levels of antioxidative enzyme activity and lipid peroxidation. Zea mays L. cv. Saracura efficiently sequestered...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.03.03.00-9 hypoxia; Chlorophyll; Oxidative stress Fisiologia Vegetal.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30997