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A cultura do caju. Infoteca-e
RAMOS, A. D.; BLEICHER, E.; FREIRE, F. das C. O.; CARDOSO, J. E.; PARENTE, J. I. G.; BARROS, L. de M.; CRISOSTOMO, L. A.; FROTA, P. C. E.; CORRÊA, M. P. F.; PESSOA, P. F. A. P.; MELO, Q. M. S.; OLIVEIRA, V. H. de.
Clima. Solos. Variedades. Propagacao. Formacao de mudas. Plantio. Poda. Irrigacao. Pragas. Doencas. Colheita, armazenamento e comercializacao. Coeficientes tecnicos.
Tipo: Col Criar Plantar ABC 500P/500R Saber (INFOTECA-E) Palavras-chave: Cashews; Cultivation; Climate; Soil; Pests; Mobility; Cultivo; Clima; Solo; Praga; Doença.
Ano: 1996 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/111488
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Ametryn Leaching in Soils from the Sugarcane Region in Northeastern Brazilian Planta Daninha
SILVA,K.S.; FREITAS,F.C.L.; BRAGA,D.F.; DOMBROSKI,J.L.D.; SANTOS,A.F.B..
ABSTRACT Ametryn is one of the most widely used herbicides in the sugarcane culture. Little is known about the interactions between this herbicide and the attributes of soils in the sugarcane region of northeastern Brazil. This knowledge, before recommending herbicide, will minimize the negative effects on the environment, particularly on water resources, and will ensure weed control efficacy. In this work, ametryn leaching potential was estimated through bioassays and chromatography, in five soils from the sugarcane region in northeastern Brazil: Quartzarenic Neosol (Entisol); Red Argisol (Ultisol); Ferrihumiluvic Spodosol (Spodosols); Red-Yellow Acrisol (Oxisol) and Haplic Cambisol (Inceptisols). To achieve this, columns were prepared with samples of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide; Liquid chromatography; Bioassay; Mobility.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400839
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Beyond group ranch subdivision: collective action for livestock mobility, ecological viability, and livelihoods AgEcon
BurnSilver, Shauna; Mwangi, Esther.
This paper leverages datasets and results from two separate studies carried out across eight Kajiado group ranches and offers a unique opportunity to look at emergent pre- and post-subdivision trends from an interdisciplinary framework that combines ecological, political, and human-ecological research perspectives. It provides insights into the following issues: the loss of flexibility and mobility for Maasai herders’ dues to subdivision, the nature of collective activities that individuals pursue after subdivision, and the emergence of pasture sharing arrangements. NDVI profiles show that forage options for individual herders decrease dramatically under privatization, but rebound somewhat when parcels are shared between households located adjacent to each...
Tipo: Journal Article Palavras-chave: Kajiado; Mobility; Flexibility; Pastoralism; Collective Action; Subdivision; Group Ranches; Livestock Production/Industries.
Ano: 2007 URL: http://purl.umn.edu/47825
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Climatic variability and cooperation in rangeland management: a case study from Niger AgEcon
McCarthy, Nancy; Vanderlinden, Jean-Paul.
In this paper, we develop an empirical model of an agro-pastoral system subject to high climatic risk to test the impact of rainfall variability on livestock densities, land allocation patterns and herd mobility observed at the community level. Also, because grazing land is a common-pool resource, we determine the impact of cooperation on these decision variables. To capture different abilities of communities to manage these externalities, we construct indices comprised of factors considered to affect the costliness of achieving successful cooperation found in the collective action literature. We then test hypotheses regarding the impact of rainfall variability and cooperation using data collected in a semi-arid region of Niger. Results indicate that...
Tipo: Working or Discussion Paper Palavras-chave: Rangelands; Environmental risk; Natural resource management; Pastoralism; Collective action; Cooperation; Institutions; Livestock stocking densities; Mobility; Niger; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2002 URL: http://purl.umn.edu/50058
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Compared boron uptake and translocation in cotton cultivars Rev. Bras. Ciênc. Solo
Bogiani,Júlio César; Rosolem,Ciro Antônio.
The mobility of boron (B), a commonly deficient micronutrient in cotton, has been shown to be low in the plant phloem. Nevertheless, studies have indicated that cotton cultivars can respond differently to B application. A greenhouse experiment was conducted to compare B absorption and mobility in cotton cultivars grown in nutrient solution. Treatments consisted of three cotton cultivars (FMT 701, DP 604BG and FMX 993), and five B rates (0.0, 2.5, 5.0, 10.0, and 20.0 µmol L-1). Plant growth and development were monitored for four weeks from the appearance of the first square. The time of onset and severity of B deficiency symptoms varied among cotton cultivars. Initial B uptake of cv. DP 604BG was lower than of the other cultivars, but a greater amount of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Variety; Micronutrient; Mobility; Remobilization.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500014
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Comportamento da atrazina em solos brasileiros em condicoes de laboratorio. Repositório Alice
NAKAGAWA, L.E.; LUCHINI, L.C.; MUSUMECI; M.R.; ANDREA, M.M. de.
A persistencia, a mobilidade e as constantes de adsorcao da atrazina foram estudadas em condicoes de laboratorio, em dois tipos de solos (Gley Humico e Latossolo Vermlho-Escuro) durante 180 dias apos a aplicacao da C-atrazina as amostras de solos, incubadas a temperatura de 25C, no escuro. A meia-vida da atrazina foi de 56 dias no solo Gley Humico e 54 dias no solo Latossolo Vermelho-Escuro. O principal produto da degradacao detectado nos dois solos foi a hidroxiatrazina, e, em maior concentracao, no solo Gely Humico. Outros dois metabolitos de atrazina, a deetilatrazina e a deisopropilatrazina, foram tambem detectados, porem, em menor concentracaao nos dois solos. A atrazina apresentou uma constante da adsorcao semelhante nos dois solos: K=2,6 no Gley...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Adsorcao; Mobilidade; Hidroxiatrazina; Persistencia; Herbicida; Adsorption; Mobility; Hydroxyatrazine; Persistence; Herbicide.
Ano: 1995 URL: http://www.alice.cnptia.embrapa.br/handle/doc/104205
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Development of a scale to evaluate mobility in dogs Ciência Rural
Gonçalves,Luísa Carneiro Vasconcelos Basto; Simões,Ana Daniela Gomes Araújo; Millis,Darryl Lynn; Matos,Augusto José Ferreira de.
ABSTRACT: The purpose of this study was to develop and to assess the psychometric characteristics of a mobility scale for dogs. The original ten questions were reduced using validation process. One hundred and twenty three dog owners were invited to answer the questionnaire. Internal consistency, factor analysis, floor and ceiling effect and construct validity were studied. Good internal consistency (Cronbach's Alpha=0.854) was determined with two items eliminated. The instrument comprises 8 final questions, each of which has five possible answers (never, rarely, sometimes, often and always) scored between 0 and 4 or between 4 and 0 (for the items with inverse score). Three hypotheses proposed for the construct validity were verified: 1) gender does not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Canine; Mobility; Psychometric methodology; Questionnaire; Validation.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001202210
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Distribution Dynamics of Dietary Energy Supply in the World AgEcon
Fousekis, Panos; Lazaridis, Panagiotis.
This paper investigates the law of motion for the cross-section distribution of dietary energy supply (DES) in the world. This has been pursued using the distribution approach and a panel of 152 countries for the period 1961-2001. According to the empirical results, persistence in caloric intakes dominates in the short-run. With time, however, upwards mobility gains momentum and the world is moving towards a long-run distribution, which is strongly skewed to the left. The estimated expected first passage times from extreme under-supply to higher intake levels are consistent with speculations that most of the developing countries will attain the 3000 kcal per person per day level by the year 2030.
Tipo: Journal Article Palavras-chave: Caloric intakes; Mobility; World; Food Consumption/Nutrition/Food Safety; C10; D12.
Ano: 2005 URL: http://purl.umn.edu/44097
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Effect of Organic Matter on the Behavior and Control Effectiveness of Herbicides in Soil Planta Daninha
TAKESHITA,V.; MENDES,K.F.; ALONSO,F.G.; TORNISIELO,V.L..
ABSTRACT: With extensive use of herbicides in agricultural areas, the risk of contamination of groundwater and surface water by these products has become a worldwide concern. Practices of application or maintenance of soil organic residues that have begun to be used in agriculture for soil nutrition have demonstrated other benefits besides nutrient supplementation, such as reduced mobility and increased soil degradation of herbicides. Because it is the final destination of herbicides, soil and its constituents, especially organic matter in tropical soils, play a prominent role in processes that encompass the dynamics of herbicide molecules. In this context, it is necessary to know the influence of the organic matter and its constituents on the behavior of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sorption; Mobility; Biodegradation; Organic carbon.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100304
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Internal architecture and mobility of tidal sand ridges in the East China Sea ArchiMer
Liu, Zhenxia; Berne, Serge; Saito, Yoshiki; Yu, Hua; Trentesaux, Alain; Uehara, Katsuto; Yin, Ping; Liu, J. Paul; Li, Chaoxing; Hu, Guanghai; Wang, Xiangqin.
On the basis of bathymetric and seismic data and data from piston cores collected by the Chinese-French marine geology and geophysics investigation of 1996, we discuss the internal architecture and mobility of tidal sand ridges in the East China Sea (ECS). We characterized the sand ridges on the middle to outer shelf of the ECS as tide-dominated sand ridges with southwest dipping beds, indicating that the regional net sediment transport is toward the southwest. As the sand ridges gradually migrate toward the southwest, new sand ridges are continually replacing old ones, and several generations of sand ridges have developed in the study area. High-resolution seismic data, acoustic Doppler current profiler data, and two C-14-dated piston cores, DGKS9614...
Tipo: Text Palavras-chave: Transgression; Ridge evolution; East China Sea; Mobility; Internal architecture; Tidal sand ridge.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3309.pdf
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Leaching of Herbicides Commonly Applied to Sugarcane in Five Agricultural Soils Planta Daninha
GUIMARÃES,A.C.D.; MENDES,K.F.; CAMPION,T.F.; CHRISTOFFOLETI,P.J.; TORNISIELO,V.L..
ABSTRACT: Leaching intensity depends on the physicochemical properties of soils and herbicides. Consequently, a good understanding of this process is essential to determine mitigation measures to reduce or eliminate the risk of water contamination around areas with sugarcane crops. Therefore, the objective of this study was to analyze the leaching of ametryn, diuron, hexazinone, and metribuzin by using columns in five soils with different physicochemical properties cultivated with sugarcane. The radiolabeled herbicides with 14C were evaluated at six soil depths (0-0.05, 0.05-0.10, 0.10-0.15, 0.15-0.20, 0.20-0.25, and 0.25-0.30 m) and in the leachate after 200 mm rainfall simulation for 48 h. Herbicide leaching was mostly affected by soil type. Ametryn and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil behavior; Pre-emergent; Leachate; Mobility.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100228
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Leaching of Sulfentrazone in Soils from the Sugarcane Region in the Northeast Region of Brazil Planta Daninha
BRAGA,D.F.; FREITAS,F.C.L.; ROCHA,P.R.R.; ARAÚJO,A.G.D.; MELO,V.C..
Sulfentrazone leaching potential is dependent on soil properties such as strength and type of clay, organic matter content and pH, and may result in ineffectiveness of the product and contamination of groundwater. The objective of this study was to evaluate sulfentrazone leaching in five soils of the sugarcane region in the Northeast Region of Brazil, with different physical and chemical properties, by means of bioassay and high-performance liquid chromatography (HPLC) resolution. The experiment was conducted in a split plot in a completely randomized design. The plots had PVC columns with a 10 cm diameter and being 50 cm deep, filled with five different soil classes (quartzarenic neosol, haplic cambisol, yellowish-red latosol, yellowish-red acrisol, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Herbicide; Bioassay; Sorption; Mobility.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100161
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Lixiviação e degradação de diuron em dois solos de textura contrastante - DOI: 10.4025/actasciagron.v30i5.5963 Agronomy
Inoue, Miriam Hiroko; UNEMAT; Oliveira Júnior, Rubem Silverio de; UEM; Constantin, Jamil; UEM; Alonso, Diego Gonçalves; UEM; Santana, Diogo Carneiro de; UNEMAT.
Objetivou-se estudar a lixiviação do diuron em colunas de solo, além do efeito de métodos de redução da atividade microbiana na degradação deste herbicida em amostras de LATOSSOLO VERMELHO Distrófico (LVd – textura franco-arenosa) e LATOSSOLO VERMELHO Distroférrico (LRd – textura argilosa). Para avaliar a movimentação do diuron (0; 1,6 e 3,2 kg há-1), foram aplicadas lâminas de 0, 20, 40, 60 e 80 mm de água. Na degradação, os métodos de restrição empregados foram: autoclavagem prévia, aplicação de brometo de metila, amoxicilina, captan e amoxicilina+captan, sendo que as amostras foram mantidas na ausência ou presença de luz. Resultados indicam que lâminas superiores a 60 mm foram suficientes para promover movimentação nítida nas amostras de LVd. Para o...
Palavras-chave: 5.01.02.00-1 Fitossanidade efeito residual; Mobilidade; Persistência; Retenção residual effect; Mobility; Persistence; Retention..
Ano: 2008 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5963
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Mortality, Mobility, and Schooling Outcomes Among Orphans: Evidence from Malawi AgEcon
Ueyama, Mika.
A tremendous increase in the number of orphans associated with a sharp rise in prime-age adult mortality due to AIDS has become a serious problem in Sub-Saharan Africa. In fact, more than 30 percent of school-aged children have lost at least one parent in Malawi. Lack of investments in human capital and adverse conditions during childhood are often associated with lower living standards in the future. Therefore, if orphans face an increased risk of poverty, exploitation, malnutrition, and poorer access to health care and schooling, early intervention is critical so as to avoid the potential poverty trap. The purpose of this study is to investigate the impacts of orphanhood/parental death on children’s mortality risks, migration behaviors, and schooling...
Tipo: Working or Discussion Paper Palavras-chave: Orphan; Mortality; Mobility; School enrollment; Grade progression; HIV/AIDS; Sample attrition; Malawi; Labor and Human Capital.
Ano: 2007 URL: http://purl.umn.edu/42403
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THE INFLUENCE OF THE LOCAL ECONOMY AND THE WILLINGNESS TO MOVE ON HUMAN CAPITAL ACCUMULATION IN CENTRAL APPALACHIA AgEcon
Broomhall, David.
This study uses logit analysis to examine the influence of the perception of local economic opportunities and the willingness to move on the educational aspirations of rural high-school-aged youths. Those youths who are more willing to move have a greater career opportunity set and a string incentive to achieve in school, since education allows them to compete for jobs elsewhere. A low willingness to move, coupled with a low perception of local job opportunities, translates into a low expected return to education, which reduces the incentive to achieve in school.
Tipo: Journal Article Palavras-chave: Economic opportunity; Educational aspirations; Human capital; Logit analysis; Mobility; Rural development; Labor and Human Capital.
Ano: 1995 URL: http://purl.umn.edu/15266
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The leaching of trifloxysulfuron-sodium and pyrithiobac-sodium in soil columns as a function of soil liming - doi: 10.4025/actasciagron.v35i2.16349 Agronomy
Guerra, Naiara; Universidade Estadual de Maringá-UEM; Oliveira Júnior, Rubem Silvério de; Universidade Estadual de Maringá - UEM; Constantin, Jamil; Universidade Estadual de Maringá - UEM; Oliveira Neto, Antonio Mendes de; Universidade Estadual de Maringá - UEM; Dan, Hugo de Almeida; Universidade Estadual de Maringá - UEM; Braz, Guilherme Braga Pereira; Universidade Estadual de Maringá - UEM.
Scarce research has been published concerning the effect of soil pH on the leaching potential of herbicides in tropical soils. Thus, we designed this study to evaluate the influence of soil liming on the leaching of trifloxysulfuron-sodium and pyrithiobac-sodium after simulated rainfall depths in soil columns. In the study, two trials were conducted simultaneously; the first experiment evaluated trifloxysulfuron-sodium (7.5 g ha-1), while the second experiment evaluated pyrithiobac-sodium (70 g ha-1). Both experiments were conducted in a randomized block design with a 2 x 4 x 5 factorial scheme and four replications. The design’s factors corresponded to 2 soil liming conditions (with or without liming), 4 simulated rainfall depths (0, 15, 30, and 45 mm)...
Palavras-chave: ALS inhibitors; Mobility; Soil pH; Tropical soils.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16349
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THE SITUATION OF THE HUNGARIAN AGRICULTURAL HIGHER EDUCATION AgEcon
Magda, Sandor; Herneczky, Andrea; Marselek, Sandor; Varga, Erika.
The knowledge-based, competitive economy places a great emphasis on the education system. The responsibility of higher education is to impart knowledge of high standard which is in harmony with the continuously changing environment. Higher education has a special role in the knowledge-based economy since it does not only have to fulfill educational but also research an innovation tasks. The decrease in the traditional role of agriculture as well as international tendencies facilitate diversification, i.e. the emergence of new roles and the relevant activities. Due to the diversification of agriculture fields like environmental protection, bioenergetics, and rural development have become more emphatic. The growing importance of these new fields is also...
Tipo: Journal Article Palavras-chave: Competitiveness; Higher education; Employment; Mobility; Agribusiness; Labor and Human Capital; Teaching/Communication/Extension/Profession.
Ano: 2009 URL: http://purl.umn.edu/53547
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Traditional ecological knowledge among transhumant pastoralists in Mediterranean Spain Ecology and Society
Mobility is a millenary human strategy to deal with environmental change. An outstanding example of mobility is transhumance, an ancient pastoralist practice consisting of the seasonal migration of livestock between ecological regions following peaks in pasture productivity. The maintenance of transhumance depends partly on the preservation of related traditional ecological knowledge (TEK). We (a) identified and characterized social groups that hold transhumance-related TEK, (b) analyzed trends in transhumance-related TEK across generations and social groups, (c) examined the factors that influence variation in levels of TEK, and (d) analyzed elements of transhumance-related TEK as examples of adaptive strategies to cope with global change. We used...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive strategy; Drove road; Environmental change; Mobility; Pastoralism; Resilience.
Ano: 2013
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Using Coupled Simulation Models to Link Pastoral Decision Making and Ecosystem Services Ecology and Society
Boone, Randall B; Natural Resource Ecology Laboratory and the Department of Forestry, Rangeland, and Watershed Stewardship, Colorado State University; rboone@nrel.colostate.edu; Galvin, Kathleen A; Department of Anthropology and the Natural Resource Ecology Laboratory, Colorado State University; kathy@nrel.colostate.edu; BurnSilver, Shauna B; Agricultural and Forestry Experiment Station, University of Alaska; sbburnsilver@alaska.edu; Thornton, Philip K; International Livestock Research Institute; University of Edinburgh; P.Thornton@cgiar.org; Ojima, Dennis S; Natural Resource Ecology Laboratory and the Department of Forestry, Rangeland, and Watershed Stewardship, Colorado State University; dennis@nrel.colostate.edu; Jawson, Jacob R; Department of Forestry, Rangeland, and Watershed Stewardship, Colorado State University; jjawson@emailisgood.com.
Historically, pastoral people were able to more freely use the services their semi-arid and arid ecosystems provide, and they adapted to changes in ways that improved their well-being. More recently, their ability to adapt has been constrained due to changes from within and from outside their communities. To compare possible responses by pastoral communities, we modeled ecosystem services and tied those services to decisions that people make at the household level. We created an agent-based household model called DECUMA, joined that model with the ecosystem model SAVANNA, and applied the linked models to southeastern Kajiado District, Kenya. The structure of the new agent-based model and linkages between the models are described, and then we demonstrate...
Tipo: Peer-Reviewed Reports Palavras-chave: Agent-based modeling; DECUMA household model; Ecosystem services; Livestock; Maasai; Mobility; Pastoral decision making; SAVANNA ecosystem model.
Ano: 2011
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