SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

MILLAR, A. A.; CHOUDHURY, E. N..

Se describe un modelo para definir la frecuencia operacional de riego para obtener maxima produccion de los cultivos. El modelo usa como informacion basica la respuesta de la planta e las condiciones de humedad en el suelo, caracteristicas de retencion y movimiento del agua en el suelo, evapotranspiracion y demanda atmosferica. Se presentan los resultados de la aplicacion del modelo en cultivos de tomate y frijol, en un suelo franco arenoso. Se discute el uso de la informacion mundial de la relacion entre rendimiento de los cultivos y el potencial matricial de agua en el suelo.

Age et croîssance du chinchard à quelque jaune (trachurus méditerraneus) dans la région nord de la Tunisie

Palavras-chave: Frequencia; Bean; Tomato; Balanço Hídrico; Feijão; Irrigação; Tomate; Frequency; Irrigation; Water balance.

Ano: 1980

URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/132547

OceanDocs

Fezzani Serbaji, S.; Chemmam-A, B.; Ben Salem, M..

Le chinchard à queue jaune est un Carangidae qui fait l’objet d’une exploitation par les différents types de pêche le long des côtes tunisiennes. Dans le présent travail on se propose d’étudier l’âge et la croissance sur la base de la distribution des fréquences de taille dans la région Nord de la Tunisie. La décomposition de ces fréquences de taille est réalisée suivant la méthode de Battacharya (1967). Deux périodes sont considérées, la première correspond à l’année 1998 et la seconde s’étale entre Novembre -1999 et Décembre -2000. Pour la première période, 6 classes d’âges ont pu être identifiées alors que pour la seconde cette valeur est de 7. Les équations de croissance linéaire annuelle suivant le modèle Von Bertalanffy (1938) ont été établies.

Tipo: Journal Contribution

Palavras-chave: Trachurus mediterraneus; Age; Age composition; Frequency; Growth; Population structure; Size distribution; Horse mackerel fisheries; Age composition; Growth; Population structure; Age; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_186.

Ano: 2006

URL: http://hdl.handle.net/1834/4276

Avaliação do manejo de águas no perímetro irrigado de Bebedouro, Petrolina, PE.

Infoteca-e

VALDIVIESO SALAZAR, C. R.; CORDEIRO, G. G..

O uso pouco racional da agua de irrigacao (condicoes de mau manejo de agua) tem originado a formacao de lencol freatico que se aproxima da superficie do solo em lugares e epocas determinadas, criando condicoes improprias ou desvangajosas para o desenvolvimento das culturas e limitando a sua produtividade. O presente trabalho refere-se a quantificacao de uso de agua no Perimetro Irrigado de Bebedouro, em Petrolina,PE, avaliando as eficiencias de irrigacao nos diferentes niveis de conducao, distribuicao e aplicacao e que permitem determinar a grandeza da quantidade de agua perdida que contribui para o problema de drenagem. Dessa forma sao conferidas frequencias de irrigacao inadequadas que mantem um regime de umidade tambem inadequado na zona radicular, em...

Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)

Palavras-chave: Eficiência; Brasil; Pernambuco; Petrolina; Projeto Bebedouro; Efficiency; Soil moisture.; Irrigação; Água; Balanço Hídrico; Manejo; Umidade; Solo.; Irrigation; Frequency; Water balance; Water management..

Ano: 1985

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133649

Embracing Uncertainty: The Interface of Bayesian Statistics and Cognitive Psychology

Ecology and Society

Anderson, Judith L; Dept. of Psychology, Simon Fraser University; janderso@sfu.ca.

Ecologists working in conservation and resource management are discovering the importance of using Bayesian analytic methods to deal explicitly with uncertainty in data analyses and decision making. However, Bayesian procedures require, as inputs and outputs, an idea that is problematic for the human brain: the probability of a hypothesis ("single-event probability"). I describe several cognitive concepts closely related to single-event probabilities, and discuss how their interchangeability in the human mind results in "cognitive illusions," apparent deficits in reasoning about uncertainty. Each cognitive illusion implies specific possible pitfalls for the use of single-event probabilities in ecology and resource management. I then discuss recent research...

Tipo: Peer-Reviewed Reports

Palavras-chave: Cognitive psychology; Judgment under uncertainty; Cognitive illusion; Bayesian statistical analysis; Bayesian decision analysis; Probability; Frequency; Expert elicitation of probabilities..

Ano: 1998

Evaluating the Factors Influecing the Number of Visits to Farmers' Markets

AgEcon

Abello, Francisco J.; Palma, Marco A.; Anderson, David P.; Waller, Mark W..

The primary objective of this paper was to determine key factors impacting the frequency of consumer visits to Texas farmers’ markets measured in number of visits per month. Data obtained from in-person surveys administered in two farmers’ markets locations were used to determine consumer, market factors, and socio-demographic characteristics of shoppers affecting frequency of visits. The results of the model showed that travel distance, number of adults in the household, market promotional characteristics such as entertainment and education activities, food events, as well as education and age were all determinants of frequency of visits to farmers’ markets.

Tipo: Presentation

Palavras-chave: Direct marketing; Frequency; Local; Farmers’ markets; Consumer/Household Economics; R11.

Ano: 2012

URL: http://purl.umn.edu/119786

Evolutionary History, Habitat Disturbance Regimes, and Anthropogenic Changes: What Do These Mean for Resilience of Pacific Salmon Populations?

Ecology and Society

Waples, Robin S.; NOAA Fisheries Northwest Fisheries Science Center; robin.waples@noaa.gov; Beechie, Tim; NOAA Fisheries, Northwest Fisheries Science Center Environmental Conservation Division; Tim.Beechie@noaa.gov; Pess, George R.; NOAA Fisheries, Northwest Fisheries Science Center Environmental Conservation Division; George.Pess@noaa.gov.

Because resilience of a biological system is a product of its evolutionary history, the historical template that describes the relationships between species and their dynamic habitats is an important point of reference. Habitats used by Pacific salmon have been quite variable throughout their evolutionary history, and these habitats can be characterized by four key attributes of disturbance regimes: frequency, magnitude, duration, and predictability. Over the past two centuries, major anthropogenic changes to salmon ecosystems have dramatically altered disturbance regimes that the species experience. To the extent that these disturbance regimes assume characteristics outside the range of the historical template, resilience of salmon populations might be...

Tipo: Peer-Reviewed Synthesis

Palavras-chave: Climate change; Duration; Frequency; Historical template; Magnitude; Pacific Northwest; Oncorhynchus; Pacific salmon; Predictability..

Ano: 2009

First survey for detecting the presence of human herpesvirus 8 infection (HHV-8) in Maputo, Mozambique

BJID

Caterino-de-Araujo,Adele; Manuel,Rolanda Carmen Rafael; Bianco,Rosana Del; Santos-Fortuna,Elizabeth; Magri,Mariana Cavalheiro; Silva,Joyce Matie Kinoshita; Bastos,Rui.

Human herpesvirus 8 (HHV-8), the etiological agent of Kaposi's sarcoma (KS), is endemic in parts of the sub-Saharan, and KS has increased concomitantly with the HIV/AIDS epidemic. In Mozambique (MZ), no data concerning HHV-8 infection was available, thus the main of this work was to investigate, for the first time, the presence of HHV-8 infection in Maputo, MZ. Latent and lytic HHV-8-specific antibodies were assessed in blood samples from 189 individuals from the Central Hospital of Maputo, MZ, using "in-house" immunofluorescence assays conducted in São Paulo, Brazil. The results obtained were analyzed according to socio-demographic and clinical variables using the Chi-square test and logistic regression. An HHV-8 seropositivity of 1.8% and 9.7% was...

Forage supply in thinned Caatinga enriched with buffel grass (Cenchrus ciliaris L.) grazed by goats and sheep - doi: 10.4025/actascianimsci.v34i2.12548

Palavras-chave: Human herpesvirus 8 (HHV-8); Serology; Mozambique; Frequency; Kaposi's sarcoma.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000300008

Animal Sciences

Formiga, Luiza Daiana Araújo da Silva; Universidade Federal de Campina Grande; Pereira Filho, José Morais; Universidade Federal de Campina Grande; Silva, Aderbal Marcos de Azevêdo; Universidade Federal de Campina Grande; Oliveira, Nadjanara Souza; Universidade Federal de Campina Grande; Soares, Diogo da Costa; Universidade Federal de Campina Grande; Bakke, Olaf Andreas; Universidade Federal de Campina Grande.

Forage supply from herbs was assessed in a thinned Caatinga enriched with buffel grass (Cenchrus ciliaris L.) exposed to goat and sheep grazing. The 2.4 ha experimental area, located at the Experimental Station of the Federal University of Campina Grande, in Santa Terezinha, Paraíba State, Brazil, was divided into four 0.6 ha paddocks, which were further subdivided into two 0.3 ha experimental plots. Twelve F1 (Boer x SRD) goats and 12 Santa Inês sheep were divided in four groups of six animals of the same species. The herbaceous vegetation was separated into buffel grass (Cenchrus ciliaris L.), dicotyledons and other grass species. Treatments were randomized to plots according to a completely random design with two treatments, four replications, with...

Tipo: PESQUISA DE CAMPO

Palavras-chave: 5.04.00.00-2 availability; Dicotyledons; Frequency; Grass; Herbs; Dry matter accumulation rate.

Ano: 2012

URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/12548

Frequency of canine heartworm disease (D. immitis) in some regions of São Paulo State using a circulating antigen indicator test

Arq. Bras. Med. Vet. Zootec.

Souza,N.F.; Larsson,M.H.M.A.

The frequency of canine heartworm disease was determined in 310 dogs (158 males and 152 females) from São Paulo city (154) and several towns along the São Paulo state coast (156). The survey was carried out through the Knott's technique (direct presence of microfilariae in the blood) and ELISA for soluble circulating antigen detection. Twenty five (8.0%) samples were positive to D. immitis using both methods being 6 dogs (3.9%) from the city and 19 (12.2%) from the coastal area. Nineteen dogs (6.1%) were positive to the Knott's technique (4 from the city and 15 from the coastal area) and 12 dogs (3.9%) to the ELISA (4 from the city and 8 from the coastal area); six dogs (1.9%) were positive for both methods being two from the city and four from the coastal...

Frequency of rhabdiasid nematodes in wild Crotalus durissus terrificus (serpentes, viperidae) from Botucatu region, São Paulo state, Brazil

Palavras-chave: Dog; Canine heartworm disease; Dirofilaria immitis; ELISA; Frequency.

Ano: 2001

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352001000300009

J. Venom. Anim. Toxins incl. Trop. Dis.

Silva,R. J.; Nogueira,M. F.; Barrella,T. H.; Takahira,R. K..

The aim of the present study was to evaluate the frequency of rhabdiasid nematodes in recently captured Crotalus durissus terrificus snakes from São Paulo State, Brazil. Fifty snakes (34 males and 16 females) were studied and each one was evaluated for the presence of that nematode at the moment of receipt at the Institution and after 90 days of quarantine inside individual cages. Tracheopulmonary washeswere examined. Snakes that died during quarantine underwent necropsy and lung examination. Analysis of the results obtained at the two evaluation times (0 and 90 days), in addition to the data obtained during necropsies, showed that 44% (18 males and 4 females) of the C. d. terrificus snakes were naturally infected by rhabdiasid nematodes. These data...

Tipo: Info:eu-repo/semantics/other

Palavras-chave: Rhabdias; Nematoda; Frequency; Crotalus durissus terrificus; Viperidae; Snakes.

Ano: 2007

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992007000100009

Índice de estresse hídrico da cultura (IEHC) combinado com a temperatura de estresse diário (TED) em feijoeiro (Phaseolus vulgaris L.) submetido a diferentes frequências de irrigação.

ALBUQUERQUE, P. E. P.; KLAR, A.E..

O objetivo do presente trabalho foi estimar valores do indice de estresse hidrico da cultura combinado com a temperatura de estresse diario (IEHCc) em feijoeiro (Phaseolus vulgaris L.) submetido a cinco frequencias de irrigacao 2, 4, 8, 12 e 16 dias. Os tratamentos foram estabelecidos em blocos casualizados com 4 repeticoes. As temperaturas da copa vegetal (Tc) foram medidas, atraves do termometro a infravermelho em dois periodos de manha (entre 10 e 11 horas) e de tarde (entre 13 e 14 horas). A maior producao de graos (2755kg.ha4) foi obtida na frequencia de irrigacao de 2 dias, com perdas relativas de 0,181; 16,7; 42,5 e 61,6%, para as frequencias de 4, 8, 12 e 16 dias, respectivamente. Nao houve diferenca estatistica entre as frequencias de 2, 4 e 8...

Influência de quatro frequências de irrigação na distribuição radicular, em três estádios de desenvolvimento da cultura do feijoeiro.

Palavras-chave: Feijao; Estresse hidrico; Temperatura; Irrigacao; Frequencia; Termometria; Phaseolus vulgaris; Bean; Water; Stress; Temperature; Irrigation; Frequency; Thermometry.

Ano: 1997

URL: http://www.alice.cnptia.embrapa.br/handle/doc/481811

BRAGA, M.B.; RAMOS, M.M.; GOMIDE, R. L..

Para quantificar a profundidade efetiva do sistema radicular do feijoeiro, foi conduzido um experimento no Centro Nacional de Pesquisa de Milho e Sorgo (CNPMS), com objetivo de quantificar a profundidade efetiva do sistema radicular da cultura do feijoeiro (profundidade onde se encontra 80% da raizes de uma planta) em um Latossolo Vermelho-Escuro Alico fase cerrado. As diversas profundidades radicular do feijoeiro foram determinados para quatro frequencias de irrigacao e em tres estadios de desenvolvimento da cultura. Para tanto, desenvolveu-se um trado que permitiu a amostragem em varias posicoes e profundidades do solo, medidos nos seguintes estadios da cultura. V4 (presenca da terceira folha trifoliada), R7 (formacao das vagens) e R9 (maturacao),...

Influência de quatro frequências de irrigação, na distribuição radicular, em três estádios de desenvolvimento na cultura do feijoeiro (Phaseolus vulgaris L. Cv. Carioca).

Palavras-chave: Feijao; Irrigacao; Frequencia; Phaseolus vulgaris; Bean; Irrigation; Frequency.

Ano: 1999

URL: http://www.alice.cnptia.embrapa.br/handle/doc/482802

Les surcotes et les décotes marines à Brest, étude statistique et évolution

BRAGA, M.B.; MAGALHAES, P. C.; GOMIDE, R. L.; MANTOVANI, E. C.; RAMOS, M.M..

1995

Tipo: Resumo em anais de congresso (ALICE)

Palavras-chave: Frequencia; Irrigacao; Profundidade efetiva; Feijoeiro; Phaseolus vulgaris; Bean; Irrigation; Frequency.

Ano: 1995

URL: http://www.alice.cnptia.embrapa.br/handle/doc/477145

ArchiMer

Bouligand, R; Pirazzoli, Pa.

Sea surges (positive or negative) are short-period events (several hours to several days) among the most extreme oceanic phenomena resulting from climatic variability. A statistical study of hourly tide-gauge records at Brest does not allow any clear trend in long-term variations of these extreme sea levels to be detected. However, the frequency of extreme positive sea surges has increased recently (1953-1994), whereas extreme and sub-extreme negative sea surges has decreased. Such trends for the highest values strengthen the prevalence of positive sea surges over negative ones. The general evolution appears to be organised around several time scales, with a strong interannual variability superimposed on periods of amplification or regression of decennial...

Tipo: Text

Palavras-chave: Niveau marin; Surcotes et décotes marines; Fréquence; Évolution; Brest; Sea level; Positive and negative sea surges; Frequency; Trend; Brest.

Ano: 1999

URL: http://archimer.ifremer.fr/doc/00325/43617/43918.pdf

Manipulação do restolho da comunidade herbácea de uma caatinga raleada no sertão central do Ceará.

CRISPIM, S. M. A.; ARAUJO FILHO, J. A. de; SERAFIM, R. G..

Resumo: A pesquisa teve por objetivo avaliar os efeitos dos percentuais crescentes da remoção da fitomassa sobre os parâmetros fitossociológicos e produtivos do estrato herbáceo, de uma caatinga raleada, em um pianossolo solódico. Os tratamentos aplicados ao fim da estação das chuvas constaram de percentuais de retirada da fitomassa do estrato herbáceo, isto é: 100, 75, 50, 25, 0 e testemunha (sem corte). A cobertura do solo não foi afetada pelos tratamentos, mas variou no período experimental (P<0,01). A frequência de Aristida setfolia H.B.K. não mudou com o tempo nem sob o efeito dos tratamentos, enquanto que as de Diodia sp. e Jaquemontia ferruginea Choisy aumentaram de 1977 a 1980, sem contudo, serem afetadas pelos percentuais de remoção testados. A...

Parasitoses intestinais em usuários do sus em Limoeiro do Norte, Ceará, antes de expansão de sistema de esgotamento sanitário.

Palavras-chave: Frequência; Remoção de fitomassa; Estrato herbáceo; Restolho de cultura; Estrato vegetal; Brasil; Ceará; Mulch; Frequency; Brazil; Caatinga; Cobertura morta; Resto de cultura; Vegetação; Herbaceous plants; Plant strata; Vegetation.

Ano: 1990

URL: http://www.alice.cnptia.embrapa.br/handle/doc/514245

MAIA, C. V. A.; HASSUM, I. C.; VALLADARES, G. S..

As parasitoses intestinais representam um agravo de amplitude mundial, sendo indicador de status socioeconômico. Sua transmissão feco-oral reforça a necessidade de ampliação de serviços de saneamento básico. O estudo tem caráter retrospectivo, descritivo e exploratório, com dados secundários, objetiva apresentar a frequência parasitária em usuários do Sistema Único de Saúde (SUS), em Limoeiro do Norte ? CE, entre janeiro de 2008 e dezembro de 2009. Os exames foram realizados por meio da técnica de sedimentação espontânea de fezes (HPJ, 1934). Os dados foram organizados e analisados por meio de estatística descritiva, através dos testes de Qui-quadrado, teste t para amostras independentes, teste de Mann-Whitney e correlção de Pearson, ambos com...

Phytosociological surveys: tools for weed science?

Palavras-chave: Frequência; Sistema único de saúde; Saneamento básico; Parasito; Parasites; Frequency; Public Health System; Sanitation.

Ano: 2015

URL: http://www.alice.cnptia.embrapa.br/handle/doc/1016882

Planta Daninha

Concenço,G.; Tomazi,M.; Correia,I.V.T.; Santos,S.A.; Galon,L..

In simple terms, a phytosociological survey is a group of ecological evaluation methods whose aim is to provide a comprehensive overview of both the composition and distribution of plant species in a given plant community. To understand the applicability of phytosociological surveys for weed science, as well as their validity, their ecological basis should be understood and the most suitable ones need to be chosen, because cultivated fields present a relatively distinct group of selecting factors when compared to natural plant communities. For weed science, the following sequence of steps is proposed as the most suitable: (1) overall infestation; (2) phytosociological tables/graphs; (3) intra-characterization by diversity; (4) inter-characterization and...

Preliminary analysis on the interdecadal variation characteristics of typhoon over the Northwestern Pacific in the past sixty years.

Palavras-chave: Weed community; Density; Frequency; Dominance; Diversity; Similarity.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000200025

OceanDocs

Yu, Fan; Zhang, Tao; Li, Pei; Li, Xiangjun.

Using typhoon data over the Northwestern Pacific (NWP) in 60 years (1950-2009), the interdecadal variations of typhoon frequency, track and intensity are statistically analyzed. The results showed that the frequency of typhoon over the NWP was high in 1960s and low in 1970s. From the late 1990s, the frequency is low again. The track of typhoon was mainly shifting, and the average track was at the southern NWP in 1960s and 1970s, but in recent 10 years, the track was at the northern NWP. The intensity of typhoon was strong in 1950s and 1960s, but becomes weak in recent 25 years. In high frequency periods of typhoon, the subtropical high of NWP was weak and its position appears easternly. The distribution of Sea Surface Temperature (SST) shows...

Tipo: Journal Contribution

Palavras-chave: Typhoons; Frequency; Tracking.

Ano: 2012

URL: http://hdl.handle.net/1834/5843

Retrospective review and systematic study of mammary tumors in dogs and characteristics of the extracellular matrix

Braz. J. Vet. Res. Anim. Sci.

Martins,Ana Maria Cristina Rabello Pinto da Fonseca; Tamaso,Elia; Guerra,José Luiz.

The aim of the present study was to perform a retrospective review, from 1932 to 1999, in order to establish the number of cases of mammary tumors in dogs in the records at the Pathology Department of Faculdade de Medicina Veterinária - USP, as well as the presence of desmoplasia and cartilaginous and bone metaplasia in 578 of these tumors. Among the 537 malignant tumors, 13.05% were simple tubular adenocarcinomas, 3.91% were complex tubular adenocarcinomas, 7.26% simple papillary adenocarcinomas, 4.28% complex papillary adenocarcinomas , 23.27% simple papillary cystadenocarcinomas ,8.37% complex papillary cystadenocarcinomas,16.38% simple solid adenocarcinomas ,6.70% complex solid adenocarcinomas, 2.04% simple spindle cell carcinomas, 1.11% simple spindle...