Consulta: subjectFacets:"Soil conservation"
Registros recuperados: 81
Data/hora: 11/06/2024 16:38:38

Influencia de la zanja trinchera en el estado hídrico y crecimiento en reforestaciones del área de Perote, Veracruz
Provedor de dados: 32
Autores: Sánchez Landero, Luz Amelia.
Se evaluó la influencia de la zanja trinchera o también llamada tinas ciegas en  términos del estado hídrico de la planta, humedad del suelo superficial y crecimiento de  árboles en una reforestación de Pinus oaxacana, en el Cofre de Perote, Veracruz. Se  seleccionaron dos sitios en campo, en donde los tratamientos fueron: reforestación  asociada a zanja trinchera (ZT), reforestación con remoción previa de suelo (RS) y  reforestación en cepa común (CC). Se establecieron 5 unidades experimentales por  tratamiento con 12 plantas cada una. Se tomaron mediciones mensuales de potencial  hídrico en plantas y contenidos volumétricos de humedad en dos profundidades (0 - 15  cm y 15 - 30 cm). Además, se instalaron sensores en los sitios para medir humedad  relativa...
Palavras-chave: Potencial hídrico; Conservación de suelos; Crecimiento arbóreo; Pinus oaxacana Plant water potential; Soil conservation; Tree growth; Pinus oaxacana.
Ano: 2012
URL: http://hdl.handle.net/10521/828

Influencia de la zanja trinchera en el estado hídrico y crecimiento en reforestaciones del área de Perote, Veracruz
Provedor de dados: 32
Autores: Sánchez Landero, Luz Amelia.
Se evaluó la influencia de la zanja trinchera o también llamada tinas ciegas en  términos del estado hídrico de la planta, humedad del suelo superficial y crecimiento de  árboles en una reforestación de Pinus oaxacana, en el Cofre de Perote, Veracruz. Se  seleccionaron dos sitios en campo, en donde los tratamientos fueron: reforestación  asociada a zanja trinchera (ZT), reforestación con remoción previa de suelo (RS) y  reforestación en cepa común (CC). Se establecieron 5 unidades experimentales por  tratamiento con 12 plantas cada una. Se tomaron mediciones mensuales de potencial  hídrico en plantas y contenidos volumétricos de humedad en dos profundidades (0 - 15  cm y 15 - 30 cm). Además, se instalaron sensores en los sitios para medir humedad  relativa...
Palavras-chave: Potencial hídrico; Conservación de suelos; Crecimiento arbóreo; Pinus oaxacana Plant water potential; Soil conservation; Tree growth; Pinus oaxacana.
Ano: 2012
URL: http://hdl.handle.net/10521/878

Influencia de la zanja trinchera en el estado hídrico y crecimiento en reforestaciones del área de Perote, Veracruz
Provedor de dados: 32
Autores: Sánchez Landero, Luz Amelia.
Se evaluó la influencia de la zanja trinchera o también llamada tinas ciegas en  términos del estado hídrico de la planta, humedad del suelo superficial y crecimiento de  árboles en una reforestación de Pinus oaxacana, en el Cofre de Perote, Veracruz. Se  seleccionaron dos sitios en campo, en donde los tratamientos fueron: reforestación  asociada a zanja trinchera (ZT), reforestación con remoción previa de suelo (RS) y  reforestación en cepa común (CC). Se establecieron 5 unidades experimentales por  tratamiento con 12 plantas cada una. Se tomaron mediciones mensuales de potencial  hídrico en plantas y contenidos volumétricos de humedad en dos profundidades (0 - 15  cm y 15 - 30 cm). Además, se instalaron sensores en los sitios para medir humedad  relativa...
Tipo: Tesis
Palavras-chave: Potencial hídrico; Conservación de suelos; Crecimiento arbóreo; Pinus oaxacana; Maestría; Forestal; Plant water potential; Soil conservation; Tree growth.
Ano: 2008
URL: http://hdl.handle.net/10521/1214

Exploring dynamic mechanisms of learning networks for resource conservation
Provedor de dados: 7
Autores: Matous, Petr; University of Tokyo; University of Sydney; petr@civil.t.u-tokyo.ac.jp; Todo, Yasuyuki; Waseda University; yastodo@waseda.jp.
The importance of networks for social-ecological processes has been recognized in the literature; however, existing studies have not sufficiently addressed the dynamic nature of networks. Using data on the social learning networks of 265 farmers in Ethiopia for 2011 and 2012 and stochastic actor-oriented modeling, we explain the mechanisms of network evolution and soil conservation. The farmers&amp;#8217; preferences for information exchange within the same social groups support the creation of interactive, clustered, nonhierarchical structures within the evolving learning networks, which contributed to the diffusion of the practice of composting. The introduced methods can be applied to determine whether and how social networks can be used to facilitate...
Tipo: Peer-Reviewed Reports
Palavras-chave: Composting; Ethiopia; Network dynamics; Social learning; Soil conservation; Stochastic actor-oriented modeling.
Ano: 2015

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

Rainfall erosivity for the State of Rio de Janeiro estimated by artificial neural network
Provedor de dados: 70
Autores: Carvalho,Daniel F. de; Khoury Júnior,Joseph K.; Varella,Carlos A. A.; Giori,Jacqueline Z.; Machado,Roriz L.
The Artificial Neural Networks (ANNs) are mathematical models method capable of estimating non-linear response plans. The advantage of these models is to present different responses of the statistical models. Thus, the objective of this study was to develop and to test ANNs for estimating rainfall erosivity index (EI30) as a function of the geographical location for the state of Rio de Janeiro, Brazil and generating a thematic visualization map. The characteristics of latitude, longitude e altitude using ANNs were acceptable to estimating EI30 and allowing visualization of the space variability of EI30. Thus, ANN is a potential option for the estimate of climatic variables in substitution to the traditional methods of interpolation.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geographic information system; Interpolation methods; Soil conservation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162012000100020

SPATIAL, SEASONAL, AND TEMPORAL VARIATIONS IN RAINFALL AGGRESSIVENESS IN THE SOUTH OF BRAZIL
Provedor de dados: 70
Autores: Back,Álvaro J.; Gonçalves,Fabiane N.; Fan,Fernando M.
ABSTRACT The objective of this study is to evaluate spatial and temporal variations in rainfall aggressiveness in southern Brazil. A total of 181 rain gauge stations located in southern Brazil with rainfall time series from 1976 to 2015 were used. Seasonal and annual rainfall aggressiveness values measured according to the Modified Fournier Index (MFI) were analyzed. The trends in the data series were evaluated using the Mann-Kendall test at a level of significance of 5%. Maps on spatial and seasonal variations in rainfall aggressiveness were prepared. The percentage of rain gauge stations with significant decreasing trends, significant increasing trends, and no significant trends in rainfall aggressiveness between years was 3.3%, 7.7%, and 89.0%,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erosivity; Soil conservation; Precipitation; Climatic trends.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400466

Pesquisas sobre o uso, manejo e conservação do solo na EMBRAPA-UEPAE Dourados.
Provedor de dados: 14
Autores: EMBRAPA. Unidade de Execução de Pesquisa de Âmbito Estadual de Dourados.
bitstream/item/73533/1/FOL-2150.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Mato Grosso do Sul.; Conservação do Solo; Cerrado; Manejo do Solo.; Brazil; Soil conservation; Soil management.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/231144

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

Atributos físico-hídricos na camada superficial de solos em diferentes posições na paisagem e sistemas de colheita de cana-de-açúcar em Coruripe, AL.
Provedor de dados: 14
Autores: AMARAL, A. J. do; MARQUES, F. A.; PARAHYBA, R. da B. V.; OLIVEIRA NETO, M. B. de; SILVA, A. B. da; BARROS, A. H. C.; NASCIMENTO, A. F. do; IVO, W. M. P. de M.
O objetivo deste trabalho foi determinar alguns atributos físico-hídricos na camada superficial do solo relacionados à retenção, armazenamento e disponibilidade de água para as plantas, em uma topossequência de solos sob diferentes sistemas de colheita de cana-de-açúcar, em comparação a uma área de referência de floresta subperenifólia, em Coruripe, AL.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Atributos do solo; Manejo do Solo; Conservação do Solo; Cana de Açúcar; Soil management; Soil conservation; Sugarcane.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1101191

Emissões de NO, N2O e CO2 em agroecossistemas do Cerrado.
Provedor de dados: 14
Autores: CARVALHO, A. M. de; BUSTAMANTE, M. M. da C.
ABSTRACT: In the last 30 years, the Cerrado Biome has suffered very intense conversion of its native vegetation into croplands (Brazilian Savanna). This habitat modification has contributed with 25% and 90% of the total CO2 and N2O anthropogenic emission respectively. Soil preparation (tillage and no-tillage), deposition of crop residues, cultivation of N-fixing species and nitrogen fertilization are management practices that influence trace gas fluxes from soil to atmosphere. Nevertheless, the interaction between such practices and NO, N2O and CO2 fluxes in the Cerrado region is still unclear. Raining events after the dry season results in NO and CO2 pulses. The interaction between nitrogen application-during rain events affects NO and CO2 emissions. The...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Carbono; Conservação do Solo; Efeito Estufa; Gás; Matéria Orgânica.; Manejo do Solo; Gases; Carbon; Greenhouse effect; Organic matter; Soil conservation; Soil management.
Ano: 2007
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/572290

Nitrogen use of a mixed tree crop plantation with a leguminous cover crop.
Provedor de dados: 14
Autores: LEHMANN, J.; SILVA JUNIOR, J. P. da; GEBAUER, G.; SILVA, L. F. da.
Study on two associated frut tree crops take up their N in comparison to a leguminous cover crop in an agroforestry system. Preliminar results showed the pueraria had the highest foliar N content followed by pupunha; cupuacu having less than the other two. One year after application, cupuacu took up more of the applied N in comparison to the total N uptake than pueraria and pupunha as seen from the high &amp;15N values. The amount of 15N taken up in relation to dry matter equaled between the three species, since pueraria had a lot higher N contents. The other sampling dates showed the same tendency.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Agrofloresta; Brasil; Amazonas; Manaus; Tropical leguminous; Bactris Gasipaes; Cobertura do Solo; Conservação do Solo; Cultivo Multiplo; Cupuaçu; Fixação de Nitrogênio; Floresta Tropical Úmida; Leguminosa Tropical; Pueraria Phaseoloides; Pupunha; Theobroma Grandiflorum; Pueraria; Agroforestry; Cover crops; Mixed cropping; Multiple cropping; Nitrogen fixation; Soil conservation; Tropical rain forests.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/668343

Water and nutrient fluxes as indicators for the stability of different land use systems on the terra firme near Manaus.
Provedor de dados: 14
Autores: SHIFT PROJECT ENV 45.
This second annual report of the project summarizes the activities between January and December 1996. During this year, the project left the preparotory stage of purchasing, importing and installing equipment and entered into the stage of routine data collection and analysis.The report is divided into two parts. In the main part, the project team is presented and its acitivities during the year 1996 are briefly summarized. The annexes give detailed accounts of selected research acitivities of the project. Despite numerous problems, all project activities were in principle successful, and there were no major changes to the time plan of the project. The root distribution studies were completed. Significant progress was made in soil physical studies, soil...
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Area abandonada; Agrofloresta; Fluxo; Brasil; Amazonas; Tropical rain forest; Agroforest; Fluxes; Analysis; Água; Análise; Conservação do Solo; Floresta Tropical Úmida; Nutriente; Environmental degradation; Nutrients; Soil conservation; Water.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667417

Uso de métodos laboratoriais e de campo para avaliação de atributos físicos do solo em lavouras de soja e milho.
Provedor de dados: 14
Autores: TOMAZI, M.; SALTON, J. C.; SANCHES, P. E. S.; COMUNELLO, E.
bitstream/item/218502/1/SOLO-VIVO-P.-198.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Atributos do solo; Produção de grãos; Soil roof; Grains production; Plantio Direto; Conservação do Solo; Cobertura do Solo; No-tillage; Soil conservation.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1127368

Manejo do palhiço residual n a cultura de cana-de-açúcar no Cerrado: primeira aproximação.
Provedor de dados: 14
Autores: SA, M. A. C. de; FRANZ, C. A. B.; SANTOS JUNIOR, J. de D. G. dos; REIN, T. A.; BUFON, V. B.; CARVALHO, A. M. de; MULLER, A. G.
bitstream/item/131266/1/cirtec-27.pdf
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Goiás; Cana-de-açúcar; Agroenergia; Brasil; Decomposition; Second-generation ethanol; Savanna.; Colheita mecânica; Cana de açúcar; Canavial; Palha; Latossolo vermelho; Cerrado; Colheita; Conservação do Solo; Decomposição; Matéria Orgânica; Saccharum Officinarum.; Brazil; Bioenergy; Harvesting; Organic matter; Soil conservation; Straw; Sugarcane.
Ano: 2015
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1026337

Agregação de um latossolo vermelho sob diferentes sistemas de manejos e de cultivos em Mato Grosso do Sul.
Provedor de dados: 14
Autores: MONTEIRO, L. C.; JUNQUEIRA, P. H.; JESUS JUNIOR, E. de; TOMAZI, M.; SALTON, J. C.
bitstream/item/204982/1/SBSA-1.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Degradação do solo; Cultivation System; Sistema conservacionista; Conservationist system; Livestock Crop Integration; Sistema de Cultivo; Conservação do Solo; Pastagem; Soil conservation; Pastures; Soil degradation.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1114622

Produção de biomassa e fornecimento de nutrientes de plantas tropicais úteis selecionadas.
Provedor de dados: 14
Autores: SCHMIDT, P.; LIEBEREI, R.; PREISINGER, H.; BAUCH, J.; GASPAROTTO, L.
Determinacao da producao de biomassa e das reservas de nutrientes de plantas tropicais uteis. Paralelamente, foi analisada a disponibilidade de nutrientes no solo. Esses experimentos podem permitir avaliar a forma mais viavel de crescimento sustentavel dos sistemas de plantio sob as condicoes prevalentes dos sitios. Sao apresentados preliminares.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Florestal tropical umida; Agrofloresta; Arvore rutifera; Derioracao do solo; Brasil; Amazonas; Reclamation; Sustainability; Biomassa; Conservação do Solo; Cultivo Multiplo; Desenvolvimento Sustentável; Essência Florestal; Fertilidade do Solo; Nutriente; Recuperação do Solo; Agroforestry; Biomass; Forest trees; Fruit trees; Multiple cropping; Soil conservation; Soil fertility.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/667461

Relatório técnico anual do Centro de Pesquisa Agropecuária dos Cerrados 1979-1980.
Provedor de dados: 14
Autores: EMBRAPA. Centro de Pesquisa Agropecuaria dos Cerrados (Planaltina, DF).
bitstream/item/131339/1/relatorio-04.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: CPAC; Aspecto socio-economico; Cultura agricola; Brasil; Socioeconomic organization; Drought stress; Plant diseases; Diffusion of research.; Conservação do Solo; Deficiência Hídrica; Cerrado; Doença de Planta; Difusão de Tecnologia; Fertilidade do Solo; Manejo do Solo; Pastagem; Pesquisa; Recurso Natural.; Crops; Brazil; Pastures; Natural resources; Research; Soil management.; Soil conservation; Soil fertility.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/548378

Sistema integração lavoura-pecuária-floresta para a região Semiárida.
Provedor de dados: 14
Autores: ZONTA, J. H.; RODRIGUES, J. I. da S.; CAVALCANTE, V. R.; LEITE, R. de M. H.; COSTA, R. F. da.
O sistema Integração Lavoura Pecuária e Floresta (ILPF) é uma estratégia de cultivo que objetiva a produção sustentável, integrando atividades agrícolas, pecuárias e fl orestais na mesma área, em cultivo consorciado, em sucessão ou rotacionado, e busca efeitos sinérgicos entre os componentes do agroecossistema, contemplando a melhoria ambiental, a valorização dos seres humanos e a viabilidade econômica. Em outras palavras, o sistema ILPF consiste na diversifi cação de cultivo, de forma que o produtor consiga, além de melhorar sua renda, conservar o solo e água da propriedade, melhorando suas condições de cultivo ao longo do tempo, e com melhor aproveitamento de água da chuva. Através deste sistema, o produtor, sendo familiar ou empresarial, tem a...
Tipo: Folhetos
Palavras-chave: Sistema de Cultivo; Integração; Lavoura; Pecuária; Floresta; Conservação da Água; Conservação do Solo; Algodão; Milho; Soja; Gergelim; Feijão; Desenvolvimento Sustentável; Controle da Erosão; Plantio Direto; Cropping systems; Intensive livestock farming; Agroforestry; Soil conservation; Water conservation; Cotton; Bean meal; Soybean meal; Soybean oil; Sesame meal; Sustainable development; Erosion control; Direct seeding.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1150301

Relatório técnico anual do Centro de Pesquisa Agropecuária dos Cerrados 1980-1981.
Provedor de dados: 14
Autores: EMBRAPA. Centro de Pesquisa Agropecuaria dos Cerrados (Planaltina, DF).
bitstream/item/131340/1/relatorio-05.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: CPAC; Aspecto socio-economico; Fonte alternativa; Plant diseases; Natural pastures; Feed crops; Management; Socioeconomic organization; Diffusion of research; Flood plains.; Agricultura; Conservação; Cerrado; Deficiência Hídrica; Difusão de Tecnologia; Energia; Doença de Planta; Fertilidade; Floresta; Manejo; Irrigação; Mecanização; Pesquisa; Pastagem Nativa; Planta Forrageira; Recurso Hídrico; Recurso Natural; Sistema de Produção; Várzea.; Solo; Agriculture; Forests; Energy; Irrigation; Research; Mechanization; Natural resources; Soil conservation; Soil management; Soil water deficit; Soil; Technology; Soil fertility; Water resources.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/548809

Soil fauna and litter decomposition in primary and secondary forests and a mixed culture system in Amazonia.
Provedor de dados: 14
Autores: SHIFT PROJECT ENV 52 (Manaus-AM).
Estudo sobre a fauna do solo e decomposicao da serapinheira feito em tres diferentes ecossistemas na Amazonia central: (1) floresta primaria (FLO), (2) floresta secundaria (SEC), e (3) duas parcelas de cultivo misto (POA, POC). As pesquisas incluiram a avaliacao da producao e estoque de serapilheira, parametros do solo, fatores microclimaticos, abundancia e biomassa da fauna do solo, determinacao da respiracao no solo e biomassa microbiana, medidas das taxas de respiracao dos componenetes da fauna, e analises de micronutrientes. Apesar das diferencas observadas entre as areas de estudo, foi observado que em todas elas o sistema de decomposicao da serapilheira foi controlado pela macrofauna, e que, em todos os sistemas de cultivo estudados, as condicoes...
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Brasil; Amazonas; Manaus; Sustainability; Agrossilvicultura; Conservação do Solo; Cultivo Multiplo; Decomposição; Desenvolvimento Sustentável; Fauna Edáfica; Fertilidade do Solo; Floresta Tropical Úmida; Serapilheira; Uso da Terra; Agroforestry; Degradation; Forest litter; Land use; Multiple cropping; Soil conservation; Soil fauna; Soil fertility; Tropical rain forests.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/669549

Importância da rotação de culturas para a produção agrícola sustentável no Paraná.
Provedor de dados: 14
Autores: FRANCHINI, J. C.; COSTA, J. M. da; DEBIASI, H.; TORRES, E.
A rotação de culturas constitui-se em um dos requisitos para a qualidade do sistema plantio direto. Com base em resultados de pesquisa obtidos em experimentos de longa duração conduzidos em diversas regiões do Paraná, este trabalho tem como objetivo demonstrar os benefícios da rotação de culturas para a sustentabilidade da produção agrícola, de modo a contribuir para aumentar a adoção dessa prática pelos produtores, assim como auxiliar na concepção e planejamento de sistemas de rotação de culturas. Os dados obtidos têm demonstrado que os benefícios da rotação de culturas sobre a qualidade do solo, bem como sobre a dinâmica de pragas, doenças e plantas daninhas, resultam em aumentos na produtividade de todas as culturas econômicas envolvidas no sistema de...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Conservação do solo; Rotação de cultura; Soil conservation; Crop rotation.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/897259

Levantamento detalhado de área piloto para conservação de solos no Município de Ibirubá, RS.
Provedor de dados: 14
Autores: PÖTTER, R. O.
O levantamento pormenorizado de duas bacias hidrográficas no município de Ibirubá, RS, foi realizado a fim de servir de base para o Plano Piloto de conservação de Solos do Centro Nacional de Pesquisa do Trigo - EMBRAPA, bem como propiciar um melhor conhecimento da região, visando uma definição mais homogênea dos seus solos e qualidades, possibilitando assim uma recomendação mais segura dos resultados experimentais obtidos e fornecer os parâmetros iniciais de identificação dos solos da região. Assim, este levantamento, cujos solos foram identificados em função do maior número de características possíveis, possibilitará um estudo mais específico de suas características em relação a utilização, comportamento e produtividade.
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Reconhecimento do solo; Conservação do solo; Soil surveys; Soil conservation.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/336003

Correção do solo, adubação e plantio.
Provedor de dados: 14
Autores: BERNARDI, A. C. de C.; MOREIRA, A.; FERREIRA, R. de P.
bitstream/item/220864/1/p-60-alfafa.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Conservação do Solo; Estrutura do Solo; Adubação; Plantio; Soil conservation; Soil conditioners; Soil structure.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1129761

Manejo e conservacao do solo em microbacias hidrograficas na regiao dos cerrados.
Provedor de dados: 14
Autores: RESCK, D. V. S.
bitstream/item/101475/1/doc-40.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Microbacia hidrografica.; Conservação; Cerrado; Manejo; Solo.; Soil conservation; Soil management; Watersheds.
Ano: 1992
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/548643

Manejo e conservação do solo.
Provedor de dados: 14
Autores: HERNANI, L. C.; SALTON, J. C.
Preparo do solo; Alternancia de implemento e profundidade de trabalho; Operacoes e transito de maquinas; Umidade do solo; Descompactacao do solo; Sistema plantio direto; Implantacao e gerenciamento; Conscientizacao; Levantamento dos recursos; Planejamento e execucao; Cobertura permanente do solo; Especies para cobertura do solo e seu manejo; Rotacao de culturas; Aspectos gerais; Sugestoes de rotacao de culturas; Otras praticas conservacionistas.
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Algodão; Conservação do Solo; Cerrado; Gossypium Hirsutum; Manejo do Solo.; Cotton; Soil conservation; Soil management.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/241149

Validação hidrológica do ?Camalhão Alto de Base Larga? como tecnologia conservacionista aplicada à cultura do tabaco
Provedor de dados: 14
Autores: DENARDIN, J. E.; MARCONI, G. P.; FAGANELLO, A.; LEMAINSKI, J.; BACK, A. J.; JUNQUEIRA, B. R.; OLIVEIRA, V. B. de.
O ?Manejo de Solo com Camalhão Alto de Base Larga? é uma prática conservacionista associada ao sistema plantio direto, preparo reduzido do solo e preparo convencional do solo, usual em pequenos estabelecimentos rurais, na região Sul do Brasil. Integrado a espécies produtoras de grãos e cobertura de solo, como trigo (Triticum aestivum), centeio (Secale cereale), aveia preta (Avena strigosa), aveia branca (Avena sativa L.), milheto (Pennisetum glaucum L.), capim Sudão (Sorghum sudanense), sorgo (Sorghum spp.), mucuna (Mucuna spp.) e braquiária (Brachiaria spp.), o ?camalhão alto de base larga? vem sendo aplicado ao cultivo de tabaco (Nicotiana tabacum), soja (Glycine max L.), milho (Zea mays) e feijão (Phaseolus vulgaris) durante as estações de primavera e...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Infiltration of water in the soil; Intense rain; Return period; Infiltração de água no solo; Chuva intensa; Período de retorno; Conservação do Solo; Soil conservation.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1131752

Práticas de conservação do solo para o Estado do Acre.
Provedor de dados: 14
Autores: OLIVEIRA, E. B. de; OLIVEIRA, V. H. de.
A crescente demanda de alimentos e as oportunidades que se apresentam para o Brasil, no mercado internacional, justificam a necessidade de incorporação da Amazônia no processo produtivo. Dentro desta realidade, o Estado do Acre se destaca como uma das opções mais viáveis. Com a expansão da fronteira agrícola do Acre, torna-se imprescindível fundamentar sua agricultura em sólidas bases conservacionistas a fim de evitar a progressiva degradação dos seus solos, os quais têm sido o verdadeiro sustentáculo de sua economia. Apesar da maioria das terras ainda não ter sido explorada e da área ocupada com agricultura ser relativamente reduzida. as condições edafoclimáticas apresentam-se altamente favoráveis à erosão, cujos efeitos, bem como as práticas mais...
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Recomendações técnicas; Agricultura conservacionista; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Prácticas de conservación de agrícolas.; Conservación de suelos; Conservação do solo; Soil conservation; Agricultural conservation practice.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/492277

Recomendacoes da Comissao Centro Brasileira de Pesquisa de Trigo para os anos de 1995/96.
Provedor de dados: 14
Autores: REUNIAO DA COMISSAO CENTRO BRASILEIRA DE PESQUISA DE TRIGO, 8., 1994, Planaltina, DF.
bitstream/item/101499/1/doc-60.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Regiao central; Brasil; Minas Gerais; Distrito Federal; Goias; Bahia; Mato Grosso; Controle; Wheats; Central region; Cultural methods; Management; Plant diseases.; Adubação; Calagem; Conservação do Solo; Cerrado; Doença de Planta; Época de Plantio; Irrigação; Manejo do Solo; Manejo; Pesquisa; Praga de Planta; Pratica Cultural; Triticum Aestivum; Variedade.; Trigo; Fertilizer application; Disease control; Brazil; Liming; Irrigation; Pest control; Research; Soil management; Sowing date; Varieties.; Soil conservation.
Ano: 1996
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/551817

MANEJO e conservação de solo e água: o meio ambiente agradece.
Provedor de dados: 14
Tipo: Folders
Palavras-chave: Manejo de Água; Manejo do Solo; Conservação da Água; Conservação do Solo; Water management; Soil management; Water conservation; Soil conservation.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/985951

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

Performance of ICRISAT pigeonpeas in China
Provedor de dados: 30
Autores: Yang, S.
Palavras-chave: Pigeonpeas; Germplasm; Biomass; Soil conservation; Intercropping; Forestry; Wet season; Cropping systems; Legumes; Crops.
Ano: 2001
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3339

Farmers' Practices and Soil and Water Conservation Programs
Provedor de dados: 30
Autores: International Crops Research Institute for the Semi-Arid Tropics.
Palavras-chave: Watersheds; Bunding; Soil conservation; Soil degradation; Resource conservation; Participation; Land resources; Water harvesting; Subsidies; Moisture conservation.
Ano: 1991
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4094

Adaptability of lettuce cultivars to planting in no-tillage on straw of Urochloa ruziziensis
Provedor de dados: 86
Autores: Hirata,Andréia Cristina Silva; Hirata,Edson Kiyoharu; Camara,João Augusto Rizzo.
Abstract: The objective of this work was to evaluate the adaptability of different lettuce (Lactuca sativa) cultivars grown in no-tillage on straw of ruzi grass (Urochloa ruziziensis), as well as its effects on soil temperature and weed control, in successive cultivations in the summer. The treatments were carried out in a randomized complete block design, with four replicates, in a split-plot arrangement (2x4), in which soil management (no-tillage on ruzi grass and convention tillage) was the main plot, and the different crisphead lettuce cultivars (Amanda, Solaris, Vanda, and Vera), the subplots. No difference was observed between cultivars for soil management. No-tillage reduced the soil temperature by up to 3.7°C and weed density by 3.7 times, in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria; Lactuca sativa; Soil conservation; Soil temperature; Vegetable crops; Weeds.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000700824

Effects of soil management systems on soil microbial activity, bulk density and chemical properties
Provedor de dados: 86
Autores: Valpassos,Maria Alexandra Reis; Cavalcante,Eloiza Gomes Silva; Cassiolato,Ana Maria Rodrigues; Alves,Marlene Cristina.
The objective of this experiment was to study the effects of soil management systems on the bulk density, chemical soil properties, and on the soil microbial activity on a Latossolo Vermelho distrófico (Oxisol). Soil samples were collected from plots under the following management conditions: a) natural dense "cerrado" vegetation (savanna); b) degraded Brachiaria decumbens pasture, 20 years old; c) no-tillage treatment with annual crop sequence (bean, corn, soybean and dark-oat in continuous rotation), 8 years old; d) conventional tillage treatment with crop residues added to the soil, and annual crop sequence, 10 years old. The continuous use of no-tillage system resulted in an increase in microbial biomass and decrease in soil basal respiration,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil chemicophysical properties; Biomass; Soil deterioration; Soil conservation.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001001200011

Parametric and Non-Parametric Estimation of Soil Conservation Impact on Productivity in the Northwestern Ethiopian Highlands
Provedor de dados: 31
Autores: Kassie,   Menale; Holden,   Stein T.
The impact of fanya juu bunds on productivity in a high rainfall area in the Ethiopian highlands is analyzed based on data from a cross section household survey with multiple plot observations per household. The results from parametric and non-parametric analysis indicated that productivity from conserved plots was lower than from non-conserved plots. The Oaxaca-Blinder productivity decomposition results showed that there was little difference in plot characteristics between conserved and non-conserved plots, however the returns to those characteristics were higher for non-conserved plots. The sensitivity analysis, increasing fodder grass production on bunds, suggests that there are possibilities to make conserved plots as productive as non-conserved ones....
Tipo: Conference Paper or Presentation
Palavras-chave: Yield decomposition; Soil conservation; Switching regression; Stochastic dominance analysis; Matching methods; Land Economics/Use; Productivity Analysis; C21; C23; Q12; Q15; Q16.
Ano: 2006
URL: http://purl.umn.edu/25281

Factors Affecting the Adoption of Soil Conservation Measures: A Case Study of Fijian Cane Farmers
Provedor de dados: 31
Autores: Asafu-Adjaye,   John.
This study explored the extent to which various factors affect Fijian cane farmers’ adoption of soil conservation measures. The significant factors affecting perception of the soil erosion problem include age, education, ethnicity, and extension services. On the other hand, the significant factors affecting soil conservation effort include perception of the erosion problem, net farm income, farm size, land type, and extension services. In general, personal characteristics appear to affect perceptions of soil erosion while the extent of conservation effort is affected by economic and physical factors. The resulting implications for soil conservation policy are discussed.
Tipo: Journal Article
Palavras-chave: Fiji; Ordered probit model; Soil conservation; Soil erosion; Sugarcane; Farm Management; Resource /Energy Economics and Policy.
Ano: 2008
URL: http://purl.umn.edu/36710

Agricultural Resources and Environmental Indicators, 2006 Edition
Provedor de dados: 31
Autores: Wiebe,   Keith D.; Gollehon,   Noel R.
This is a large file. We have had reports of problems opening the file in Mozilla Firefox. If you have problems, try using Windows Internet Explorer.
Tipo: Report
Palavras-chave: ERS; AREI; Agricultural economics; Natural resources; Land; Land use; Land values; Land ownership; Water use; Irrigation; Water quality; Genetic resources; Biotechnology; Agricultural research; Agricultural productivity; Global resources; Soil conservation; Soil erosion; Pest management; Nutrient management; Animal agriculture; Organic agriculture; Conventional agriculture; Conservation policy; Land retirement; Working lands; Wetlands; Farmland protection; Environmental quality; Farm structure; Farm ownership; Farm management decisions; Farm business; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2006
URL: http://purl.umn.edu/7207

Cost-Responsiveness of Conservation Practice Adoption: A Revealed Preference Approach
Provedor de dados: 31
Autores: Lichtenberg,   Erik.
While there is current interest in reorienting agricultural policy toward environmental and resource conservation goals, relatively little is known about the influence of cost on conservation adoption decisions or about how farmers combine multiple practices into an overall conservation package. Using farmer survey data combined with information on standard unit installation costs, this study estimates latent demand models for seven on-farm conservation practices. All of the practices exhibit downward-sloping demand. Topographical variations in adoption conform to expectations. The estimation results suggest that cost sharing should have substantial effects on the adoption of several practices, and indicate strong complementarity among others.
Tipo: Journal Article
Palavras-chave: Conservation technology adoption; Cost-sharing; Environmental Quality Incentives Program (EQIP); Green payments; Soil conservation; Water quality protection; Environmental Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/30920

Improved water and land management in the Ethiopian highlands: its impact on downstream stakeholders dependent on the Blue Nile; Intermediate Results Dissemination Workshop February 5-6, 2009, Addis Ababa, Ethiopia
Provedor de dados: 31
Autores: Awulachew,   Seleshi Bekele; Erkossa,   Teklu; Smakhtin,   Vladimir U.; Fernando,   Ashra.
Tipo: Conference Paper or Presentation
Palavras-chave: River basin management; Watershed management; Farming systems; Water balance; Reservoirs; Water supply; Irrigation requirements; Irrigation programs; Simulation models; Sedimentation; Rainfall-Runoff relationships; Erosion; Soil water; Water balance; Soil conservation; Institutions; Organizations; Policy; Water governance; International waters; Institutional and Behavioral Economics; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/118389

Land Management Decisions and Agricultural Productivity in the Hillsides of Honduras
Provedor de dados: 31
Autores: Jansen,   Hans G.P.; Pender,   John L.; Damon,   Amy L.; Schipper,   Robert A.
Increasing land degradation and concomitant low agricultural productivity are important determinants of rural poverty in the hillside areas of Honduras. Using data at the levels of the farm household, parcel and plot, we develop an econometric modeling framework to analyze land management decisions and their impact on crop productivity. Our econometric model allows for endogenous household decisions regarding livelihood strategy choice, use of labor and external inputs, and participation in organizations. We found support for the inverse farm size-land productivity relationship which suggests that improved land access could increase total crop production. Land tenure has no impact on crop productivity, but adoption of soil conservation practices is higher...
Tipo: Conference Paper or Presentation
Palavras-chave: Agricultural productivity; Hillsides; Honduras; Land management; Soil conservation; Land Economics/Use; Productivity Analysis.
Ano: 2006
URL: http://purl.umn.edu/25302

Impact of Soil Conservation on Crop Production in the Northern Ethiopian Highlands
Provedor de dados: 31
Autores: Kassie,   Menale; Pender,   John L.; Yesuf,   Mahmud; Kohlin,   Gunnar; Bluffstone,   Randall; Mulugeta,   Elias.
Land degradation, in the form of soil erosion and nutrient depletion, threatens food security and the sustainability of agricultural production in many developing countries. Governments and development agencies have invested substantial resources in promoting soil conservation practices, in an effort to improve environmental conditions and reduce poverty. However, very limited rigorous empirical work has examined the economics of adopting soil conservation technology. This paper investigates the impact of stone bunds1 on crop production value per hectare in low and high rainfall areas of the Ethiopian highlands using cross-sectional data from more than 900 households having multiple plots per household. We use modified random effects models, stochastic...
Tipo: Working or Discussion Paper
Palavras-chave: Ethiopia; Soil conservation; Crop production; Agro-ecology; Matching method; Stochastic dominance; Modified random effects model; Crop Production/Industries; Land Economics/Use.
Ano: 2007
URL: http://purl.umn.edu/42366

Water management in the Yellow River Basin: Background, current critical issues and future research needs
Provedor de dados: 31
Autores: Giordano,   Mark; Zhu,   Zhongping; Cai,   Ximing; Hong,   Shangchi; Xue,   Yunpeng; Zhang,   Xuecheng.
Tipo: Report
Palavras-chave: River basin development; Water management; Water use; History; Water stress; Water scarcity; Flood water; Soil conservation; Policy; Water quality; Environmental effects; Water conservation; Irrigation water; Pollution control; Environmental Economics and Policy; Resource /Energy Economics and Policy; Risk and Uncertainty.
Ano: 2004
URL: http://purl.umn.edu/92826

ENVIRONMENTAL AND ECONOMIC IMPACTS OF SOIL EROSION AND FERTILITY MINING IN NORTHERN TANZANIA
Provedor de dados: 31
Autores: Nkonya,   Ephraim M.; Barkley,   Andrew P.; Hamilton,   Stephen F.; Bernardo,   Daniel J.
This paper develops a soil conservation model that is relevant to smallholder farmers who apply little or no fertilizer. Empirical results drawn from northern Tanzania imply that, ignoring fertility mining problem in model specification leads to overestimation of profits for farms that apply little or no fertilizer.  The model also shows that, the impact of output price on soil conservation efforts depends on the curvature of the soil erosion function.
Tipo: Conference Paper or Presentation
Palavras-chave: Soil erosion; Fertility mining; Soil conservation; Price policy; Soil erosion function; Sub-Saharan Africa; Tanzania.; Environmental Economics and Policy; Land Economics/Use.
Ano: 1999
URL: http://purl.umn.edu/21623

Adopción de prácticas de conservación de suelos, en la pequeña agricultura de Chile Central
Provedor de dados: 31
Autores: Jara-Rojas,   Roberto; Bravo-Ureta,   Boris E.; Diaz Osorio,   Jose.
Published by Asociación de Economistas Agrarios de Chile
Tipo: Journal Article
Palavras-chave: Technology adoption; Soil conservation; Poisson regression; Peasant farmers; Chile.; Community/Rural/Urban Development; Land Economics/Use; Production Economics.
Ano: 2009
URL: http://purl.umn.edu/97379

Overview of water and soil nutrient management under smallholder rain-fed agriculture in East Africa.
Provedor de dados: 31
Autores: Mati,   Bancy Mbura.
Tipo: Working or Discussion Paper
Palavras-chave: Soil conservation; Water conservation; Water harvesting; Terraces; Tillage; Ridging; Cropping systems; Bunds; Sugarcane; Spate irrigation; Pitcher irrigation; Water storage; Soil fertility; Fertilizers; Non-governmental organizations; Farmers’ associations; Agroforestry; Agricultural extension; Agricultural and Food Policy; Agricultural Finance; Crop Production/Industries; Industrial Organization; Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/92406

Soil conservation and technical efficiency among hillside farmers in Central America: a switching regression model
Provedor de dados: 31
Autores: Solis,   Daniel; Bravo-Ureta,   Boris E.; Quiroga,   Ricardo E.
The main objective of this paper is to evaluate and analyse technical efficiency (TE) levels for hillside farmers under different levels of adoption of soil conservation in El Salvador and Honduras. A switching regression model is implemented to examine potential selectivity bias for high and low level adopters, and separate stochastic production frontiers, corrected for selectivity bias, are estimated for each group. The main results indicate that households with above-average adoption show statistically higher average TE than those with lower adoption. Households with higher adoption have smaller farms and display the highest partial output elasticity for land. Constraints in the land and credit markets are likely explanations for these differences. In...
Tipo: Article
Palavras-chave: Central America; Soil conservation; Stochastic frontiers; Switching regression; Technical efficiency; Resource /Energy Economics and Policy.
Ano: 2007
URL: http://purl.umn.edu/118529

THE EMERGENCE AND SPREADING OF AN IMPROVED TRADITIONAL SOIL AND WATER CONSERVATION PRACTICE IN BURKINA FASO
Provedor de dados: 31
Autores: Kabore,   Daniel; Reij,   Chris.
This paper describes the emergence of improved traditional planting pits (zaï) in Burkina Faso in the early 1980s as well as their advantages, disadvantages and impact. The zaï emerged in a context of recurrent droughts and frequent harvest failures, which triggered farmers to start improving this local practice. Despair triggered experimentation and innovation by farmers. These processes were supported and complemented by external intervention. Between 1985 and 2000 substantial public investment has taken place in soil and water conservation (SWC). The socio-economic and environmental situation on the northern part of the Central Plateau is still precarious for many farming families, but the predicted environmental collapse has not occurred and in many...
Tipo: Working or Discussion Paper
Palavras-chave: Soil fertility; Soil conservation; Water conservation; Resource /Energy Economics and Policy.
Ano: 2004
URL: http://purl.umn.edu/16087

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

Adoption of Soil Conservation Practices in Olive Groves: The Case of Spanish Mountainous Areas
Provedor de dados: 31
Autores: Calatrava-Leyva,   Javier; Franco,   Juan Agustin; Gonzalez-Roa,   Maria del Carmen.
This paper presents some results from a survey carried out in 2004 among 223 olive tree farmers from mountainous areas in the Spanish Southern provinces of Granada and Jaen regarding the adoption of soil conservation and management practices. Olive tree groves in mountainous areas are subject to a high risk of soil erosion and have to incur in higher costs of soil conservation. This results in greater difficulties to comply with cross-compliance and to benefit from agri-environmental schemes. Our main objectives are to analyse the current level of adoption of soil conservation practices and to analyse which socio-economic and institutional factors determine such adoption. Three Probit models are estimated. Dependant variables are three different soil...
Tipo: Conference Paper or Presentation
Palavras-chave: Olive groves; Soil conservation; Technology adoption; Resource /Energy Economics and Policy; Q12; Q24.
Ano: 2005
URL: http://purl.umn.edu/24661

Effects of Participation in Organic Markets and Farmer-based Organizations on the Adoption of Soil Conservation Practices among Small-scale Farmers in Honduras
Provedor de dados: 31
Autores: Wollni,   Meike; Lee,   David R.; Thies,   Janice E.
Conservation agriculture is often perceived to provide “win-win” outcomes for farmers leading to reduced erosion and off-site sedimentation, as well as improved soil fertility and productivity. However, adoption rates for conservation agriculture in many regions of the world remain below expected levels. This paper looks at the effect of organic markets in providing incentives for farmers to adopt soil conservation practices. Farmer-based organizations may link farmers to these markets by helping them overcome information deficiencies with respect to production standards and consumer preferences. Based on original survey data from 241 small-scale farm households in Honduras, we find that both participation in organic markets and farmer-based groups have...
Tipo: Conference Paper or Presentation
Palavras-chave: Soil conservation; Technology adoption; Organic markets; Farmer organizations; Agricultural and Food Policy; Community/Rural/Urban Development; Environmental Economics and Policy; International Development; Q01; Q12; Q13; Q16.
Ano: 2009
URL: http://purl.umn.edu/51669

POISSON COUNT MODELS TO EXPLAIN THE ADOPTION OF AGRICULTURAL AND NATURAL RESOURCE MANAGEMENT TECHNOLOGIES BY SMALL FARMERS IN CENTRAL AMERICAN COUNTRIES
Provedor de dados: 31
Autores: Ramirez,   Octavio A.; Schultz,   Steven D.
Evaluations of the factors influencing the adoption of agricultural and natural resource management technologies among small farmers in developing countries have been mostly limited to qualitative discussions or simple descriptive statistics resulting in superficial and inconclusive findings. This study introduces the use of Poisson Count Regressions as a statistically appropriate procedure to analyze certain common types of adoption data. It uses them to assess the impact of key socio-economic, bio-physical, and institutional factors on the adoption of integrated pest management, agroforestry, and soil conservation technologies among small farmers in three Central American countries: Costa Rica, Panama, and El Salvador.
Tipo: Journal Article
Palavras-chave: Agroforestry; Evaluation of development projects; Integrated pest management; Poisson count regressions; Soil conservation; Technology adoption; Farm Management; Research and Development/Tech Change/Emerging Technologies.
Ano: 2000
URL: http://purl.umn.edu/15400

Social capital and soil conservation: evidence from the Philippines
Provedor de dados: 31
Autores: Cramb,   Rob A.
The formation of social capital is hypothesised to enhance collective efforts for soil conservation. The Landcare Program in the southern Philippines promotes simple conservation practices in upland environments by supporting community landcare groups and municipal landcare associations, thus augmenting social capital. A study was conducted in 2002–2003 to evaluate the Landcare Program, using a mix of quantitative and qualitative techniques. In the present paper, the relationship between social capital formation and adoption of soil conservation in theMunicipality of Lantapan is investigated. It is concluded that the Landcare Program as a whole created a valuable stock of bridging social capital, rapidly accelerating the adoption of contour farming...
Tipo: Article
Palavras-chave: Landcare; Social capital; Soil conservation; The Philippines; Resource /Energy Economics and Policy.
Ano: 2005
URL: http://purl.umn.edu/118498

Improved water and land management in the Ethiopian highlands: its impact on downstream stakeholders dependent on the Blue Nile; Intermediate Results Dissemination Workshop February 5-6, 2009, Addis Ababa, Ethiopia
Provedor de dados: 31
Autores: Awulachew,   Seleshi Bekele; Erkossa,   Teklu; Smakhtin,   Vladimir U.; Fernando,   Ashra.
Tipo: Conference Paper or Presentation
Palavras-chave: River basin management; Water governance; Environmental flows; Simulation models; Reservoirs; Sedimentation; Rainfall-Runoff relationships; Hydrology; Water balance; Erosion; Soil conservation; Watersheds; Irrigation schemes; Water use; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy.
Ano: 2009
URL: http://purl.umn.edu/118388

Adoption of Soil Erosion Control Practices in Southern Spain Olive Groves
Provedor de dados: 31
Autores: Franco,   Juan Agustin; Calatrava-Leyva,   Javier.
This paper presents results from a survey carried out in 2005 among 147 olive tree farmers from the Alto Genil River Basin in Southern Spain regarding the adoption of soil conservation and management practices. Olive tree groves in South-eastern Spain's mountainous areas are subject to a high risk of soil erosion and have to incur in high costs of soil conservation. This results in great difficulties to comply with cross-compliance and to benefit from agri-environmental schemes. Our main objectives are to analyse the current level of adoption of soil conservation practices and to analyse which socio-economic and institutional factors determine such adoption. Three Probit models are estimated. Dependant variables are three different soil conservation...
Tipo: Conference Paper or Presentation
Palavras-chave: Olive groves; Soil erosion; Soil conservation; Cross compliance; Crop Production/Industries; Q12; Q24.
Ano: 2006
URL: http://purl.umn.edu/25787

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

Spatial Interpolation of Rainfall Erosivity Using Artificial Neural Networks for Southern Brazil Conditions
Provedor de dados: 90
Autores: Moreira,Michel Castro; Oliveira,Thiago Emanuel Cunha de; Cecílio,Roberto Avelino; Pinto,Francisco de Assis de Carvalho; Pruski,Fernando Falco.
ABSTRACT Water erosion is the process of disaggregation and transport of sediments, and rainfall erosivity is a numerical value that expresses the erosive capacity of rain. The scarcity of information on rainfall erosivity makes it difficult or impossible to use to estimate losses occasioned by the erosive process. The objective of this study was to develop Artificial Neural Networks (ANNs) for spatial interpolation of the monthly and annual values of rainfall erosivity at any location in the state of Rio Grande do Sul, and a software that enables the use of these networks in a simple and fast manner. This experiment used 103 rainfall stations in Rio Grande do Sul and their surrounding area to generate synthetic rainfall series on the software ClimaBR 2.0....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erosive potential of rainfall; Soil conservation; Universal soil loss equation.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100537

Effects of erosion and deposition on particle size distribution of deposited farmland soils on the chinese loess plateau
Provedor de dados: 90
Autores: Zhao,Pei; Shao,Ming An; Omran,Wail; Amer,Abdel-monem Mohamed.
Particle size distribution (PSD) in the soil profile is strongly related to erosion, deposition, and physical and chemical processes. Water cycling and plant growth are also affected by PSD. Material sedimented upstream of the dam constructions formed large areas of deposited farmland (DF) soils on the Chinese Loess Plateau (CLP), which has been the site of the most severe soil erosion in the world. Two DFs without tillage on the CLP were chosen to study the combined effect of erosion and check dams on PSD. Eighty-eight layers (each 10 cm thick) of filled deposited farmland (FDF) soils and 22 layers of silting deposited farmland (SDF) soils of each studied soil profile were collected and 932 soil samples were investigated using laser granulometry. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil texture; Stratification; Soil erodibility; Dam construction; Soil conservation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000600028

Estimates of Annual Soil Loss Rates in the State of São Paulo, Brazil
Provedor de dados: 90
Autores: Medeiros,Grasiela de Oliveira Rodrigues; Giarolla,Angelica; Sampaio,Gilvan; Marinho,Mara de Andrade.
ABSTRACT: Soil is a natural resource that has been affected by human pressures beyond its renewal capacity. For this reason, large agricultural areas that were productive have been abandoned due to soil degradation, mainly caused by the erosion process. The objective of this study was to apply the Universal Soil Loss Equation to generate more recent estimates of soil loss rates for the state of São Paulo using a database with information from medium resolution (30 m). The results showed that many areas of the state have high (critical) levels of soil degradation due to the predominance of consolidated human activities, especially in growing sugarcane and pasture use. The average estimated rate of soil loss is 30 Mg ha-1 yr-1 and 59 % of the area of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Erosion; USLE; Soil conservation; GIS; Geoprocessing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100551

Assessment of soil erosion in olive orchards (Olea europaea L.) under cover crops management systems in the tropical region of Brazil
Provedor de dados: 90
Autores: Beniaich,Adnane; Silva,Marx Leandro Naves; Guimarães,Danielle Vieira; Bispo,Diêgo Faustolo Alves; Avanzi,Junior Cesar; Curi,Nilton; Pio,Rafael; Dondeyne,Stefaan.
ABSTRACT In the tropics, water erosion is one of the most important factors leading to the degradation and deterioration of agricultural land. Olive orchards have a low canopy coverage, especially during the first years after planting, due to the low density of olive trees. Given the fast expansion of olive orchards in Brazil, this study aimed to evaluate the effect of cover vegetation on soil and water losses under natural rainfall. In addition, it was assessed the crop performance and the vegetation cover index in different management systems in olive orchards. The study was carried out in soil erosion plots, where water and sediment were sampled and measured over two crops season, under the following treatments: in the first season, bare soil with olive...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Soil loss; Land degradation; Runoff; Olive cultivation.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832020000100503

Relationship Among Crop Systems, Soil Cover, and Water Erosion on a Typic Hapludox
Provedor de dados: 90
Autores: Lima,Pedro Luiz Terra; Silva,Marx Leandro Naves; Quinton,John Norman; Batista,Pedro Velloso Gomes; Cândido,Bernardo Moreira; Curi,Nilton.
ABSTRACT Several soil conservation practices are used to reduce water erosion and ensure sustainable agriculture. An effective crop management practice is intercropping, in which two or more crops with different architectures and vegetative cycles are grown simultaneously in the same area. We hypothesized that intercropping of corn and jack-bean increases soil cover and reduce soil erosion by water in comparison to monocropping. The objective of this study was to evaluate the effects of different crop systems on soil cover and on soil erosion by water. Soil and water losses from a Typic Hapludox were measured under the following systems: corn cultivation (CO), jack-bean cultivation (JB), intercropping of corn and jack-bean (IC), and bare soil (BS), as a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intercropping; Soil conservation; Zea mays; Canavalia ensiformis; Linear mixed models.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100511

Institutional landmarks in Brazilian research on soil erosion: a historical overview
Provedor de dados: 90
Autores: Telles,Tiago Santos; Dechen,Sonia Carmela Falci; Guimarães,Maria de Fátima.
The problem of soil erosion in Brazil has been a focus of agricultural scientific research since the 19th century. The aim of this study was to provide a historical overview of the institutional landmarks which gave rise to the first studies in soil erosion and established the foundations of agricultural research in Brazil. The 19th century and beginning of the 20th century saw the founding of a series of institutions in Brazil, such as Botanical Gardens, executive institutions, research institutes, experimental stations, educational institutions of agricultural sciences, as well as the creation and diversification of scientific journals. These entities, each in its own way, served to foster soil erosion research in Brazil. During the Imperial period...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Historiography; Soil conservation; Land degradation; Soil science.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000600001

Inter-relation between soybean yield and soil compaction under degraded pasture in Brazilian Savannah
Provedor de dados: 90
Autores: Queiroz,Rienni de Paula; Lazarini,Edson; Santos,Marcio Lustosa; Carvalho,Morel de Passos e; Santos,Cristiano.
The Cerrado (Brazilian Savannah) plays an important economic and financial role in the nation, since the pastures of this biome feed cattle for half of the domestic bovine meat productivity, and its agricultural fields produce a third of the country's grain. The variability and spatial dependence between the soil physical attributes and soybean yield were evaluated in a crop rotation planted on a degraded brachiaria pasture, on a dystroferric Red Latosol of an experimental farm of the State University of São Paulo (UNESP), in the 2005/2006 growing season. The linear and spatial correlations between these attributes were also studied, to determine conditions that would allow increased agricultural productivity. In the above pasture area, a grid was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Crop rotation; Pasture management; Glycine max (L.) Merrill; Spatial variability.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500012

Erosive rainfall in Rio do Peixe Valley in Santa Catarina, Brazil: Part I - Determination of the erosivity index
Provedor de dados: 91
Autores: Back,Álvaro J.; Pola,Augusto C.; Ladwig,Nilzo I.; Schwalm,Hugo.
ABSTRACT This study aimed to determine the rainfall erosivity index in the Valley of Rio do Peixe, in the state of Santa Catarina, Brazil. The data series of three rain gauge stations in the cities of Campos Novos, Videira, and Caçador were used to determine the rainfall erosivity based on the EI30 index and to adjust the equations in order to estimate the EI30 value from the rainfall coefficient. On average, it was observed that erosive rains represents 81.4-88.5% of the annual precipitation. The adjusted equations can be used to estimate rainfall erosivity in locations with only rainfall data. The regional equation specified for the erosivity estimation is EI30 = 74.23 Rc0.8087. The R factor is 8,704.8; 7,340.8; and 6,387.1 MJ mm ha-1 h-1 year-1 for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil loss; Soil conservation; Water erosion; Precipitation.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001100774

Carbon stocks of an Oxisol after thirty-eight years under different tillage systems
Provedor de dados: 91
Autores: Magalhaes,Sulamirtes S. de A.; Ramos,Fabricio T.; Weber,Oscarlina L. dos S.
ABSTRACT Soil carbon (C) stock determination can subsidize discussions on the continuity of an agricultural management. This study aimed to evaluate the stocks of total organic C (STOC) and labile C (SLC), and the indices of C lability (CLI), C compartment (CCI) and C management (CMI), and correlate them with chemical and physical attributes of a Red Yellow Latosol (Oxisol) managed for 38 years with different tillage systems in a Cerrado region of Mato Grosso, Brazil. Disturbed and undisturbed soil samples were collected in three layers (0-0.05, 0.05-0.10 and 0.10-0.20 m). The CMI (CLI x CCI) showed higher STOC possibly as the tillage depth decreased, because none of the tillage systems conserved STOC and SLC in the layers of 0-0.05 and 0.05-0.10 m,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Crop rotation; Soil organic matter.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000100085

Productivity of castor bean plants intercropped at different plant densities with Urochloa ruziziensis
Provedor de dados: 91
Autores: Cordeiro,Carlos F. dos S.; Echer,Fábio R.; Pires,Lucas H. T.; Creste,José E.
ABSTRACT Castor bean is an important raw material to produce biofuel in Brazil and can be grown in several regions of the country due to its good adaptation and tolerance to high temperatures and water deficit. The objective of this study was to evaluate the productivity of castor bean plants intercropped at different plant densities with Urochloa ruziziensis. The experiment was conducted in a randomized block design with four replications, using a 4 × 2 factorial arrangement, consisting of four plant densities (13,574, 24,512, 36,816, and 40,723 plants ha-1) of castor bean and two crop systems (single crop, and intercrop with Urochloa ruziziensis). The data were subjected to analyses of variance and regression, and means were compared by the Tukey’s test...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ricinus communis L.; Crop system; Second crop; Soil conservation; Intercrop.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200109

Erosive rainfall in the Rio do Peixe Valley: Part III - Risk of extreme events
Provedor de dados: 91
Autores: Back,Álvaro J.; Pola,Augusto C.; Ladwig,Nilzo I.; Schwalm,Hugo.
ABSTRACT Understanding the risks of extreme events related to soil erosion is important for adequate dimensioning of erosion and runoff control structures. The objective of this study was to determine the rainfall erosivity with different return periods for the Valley of the Rio do Peixe in Santa Catarina state, Brazil. Daily pluviographic data series from 1984 to 2014 from the Campos Novos, and Videira meteorological stations and from 1986 to 2014 from the Caçador station were used. The data series of maximum annual rainfall intensity in 30 min, maximum annual erosive rainfall, and total annual erosivity were analyzed for each station. The Gumbel-Chow distributions were adjusted and their adhesions were evaluated by the Kolmogorov-Smirnov test at a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Water erosion; Precipitation; Probability.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000100063

Erosive rainfall in the Rio do Peixe Valley in Santa Catarina, Brazil: Part II - Characteristics and temporal distribution pattern
Provedor de dados: 91
Autores: Back,Álvaro J.; Pola,Augusto C.; Ladwig,Nilzo I.; Schwalm,Hugo.
ABSTRACT Exploring the characteristics of erosive rain is an important aspect of studying erosive processes, and it allows researchers to create more natural and realistic hydrological simulations. The objective of this study was to analyse the characteristics of erosive rain and to determine the temporal distribution pattern of erosive rainfall in the Valley of Rio do Peixe in the state of Santa Catarina, Brazil. Daily pluviograms from the meteorological stations located in the cities Campos Novos, Videira, and Caçador in Santa Catarina from 1984 to 2014 were utilized for this study. By studying rainfall that is classified as erosive, the values of kinetic energy, maximum intensity in thirty minutes, and the value of EI30 erosivity index were determined....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Water erosion; Minimum tillage.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017001100780

SOIL CHEMICAL PROPERTIES IN AN INTEGRATED CROP-LIVESTOCK-FORESTRY SYSTEM
Provedor de dados: 107
Autores: Rodrigues, Marcio Neves; Santos, Leonardo David Tuffi; Sampaio, Regynaldo Arruda; Fernandes, Luiz Arnaldo.
The experiment was conducted in Eutrophic Red-Yellow Ultisol, and aimed to evaluate soil chemical properties in ICLF systems compared with other types of soil use. The study assessed ICLF systems, monocultures of acacia (Acacia mangium), Eucalyptus (Eucalyptus urophylla x E. grandis), Urochloa Brizantha, Urochloa decumbens, Sorghum bicolor and Panicum maximum, with crop variations in three agricultural cycles in a 2 year period, compared to native vegetation, 8-year-old U. Brizantha pasture and degraded pasture of P. maximum with areas of exposed soil. Compared to native forest and well-managed pastures and ICLF systems, contents of organic matter and calcium in the soil were lower in monocultures of eucalyptus, acacia and forage. The fact that the soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: CIÊNCIAS AGRÁRIAS  CIÊNCIA DO SOLO  QUÍMICA DO SOLO agroforestry system; Soil conservation; Degraded areas and environmental reclamation.
Ano: 2017
URL: http://www.seer.ufv.br/seer/index.php/reveng/article/view/695

Valuation and assessment of soil erosion costs
Provedor de dados: 63
Autores: Telles,Tiago Santos; Dechen,Sonia Carmela Falci; Souza,Luiz Gustavo Antonio de; Guimarães,Maria de Fátima.
Soil is an essential natural resource for humans and an important part of the environment. However, soil is often used and managed inappropriately, causing its erosion and degradation, with concomitantly negative social, political and economic impacts. This study aimed to discuss sustainable development; and losses and problems caused by soil erosion, and to suggest a model for assessing erosion costs. The relevance of economic models for costing soil erosion is stressed. Based on an economic theory, it presents a procedure for assessing economic costs of soil erosion, centered on the on-site and off-site costs that are generated. The physical processes of soil erosion are described and their economic effects reviewed, drawing on theoretical and empirical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil degradation; Soil loss; Soil conservation; Sustainable development.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000300010

อิทธิพลของการใช้ที่ดินต่อสมบัติของดินในพื้นที่อ่างขาง จังหวัดเชียงใหม่
Provedor de dados: 106
Autores: Naruemol Wasuwan.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Soil properties; Soil conservation; Soil management; Land use; Ang Khang area; Chiang Mai province; การใช้ที่ดิน; การอนุรักษ์ดิน; การจัดการดิน; คุณสมบัติของดิน; พื้นที่อ่างขาง; จ.เชียงใหม่.
Ano: 2008
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5472

Heavy metal concentrations and ecological risk assessment of the suspended sediments of a multi-contaminated Brazilian watershed
Provedor de dados: 1
Autores: Silva, Yuri Jacques Agra Bezerra da; Cantalice, José Ramon Barros; Singh, Vijay Pal; Nascimento, Clístenes Williams Araújo do; Wilcox, Bradford Paul; Silva, Ygor Jacques Agra Bezerra da.
Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn was assessed using pollution indices, ecological risk assessment, statistical multivariate techniques and comparison with sediment quality guidelines. Suspended sediments of the upstream portion of the Ipojuca River are moderately contaminated, especially with Mn and As. On the other hand, sediments of the downstream section are highly contaminated, mainly with Zn, Pb, and As. Furthermore, the mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: River pollution; Soil conservation; Sediment quality; Trace elements.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42620

Produtividade de feijão-guará e efeito supressivo de culturas de cobertura de inverno em espontâneas de verão - DOI: 10.4025/actasciagron.v31i4.988
Provedor de dados: 1
Autores: Bittencourt, Henrique Von Hertwig; IAPAR; Lovato, Paulo Emílio; UFSC; Comin, Jucinei José; UFSC; Lana, Marcos Alberto; UFSC; Altieri, Miguel Angel; Universidade da California em Berkeley.
Investigou-se o efeito das coberturas de inverno centeio, aveia, azevém, ervilhaca e nabo forrageiro (e suas associações), em sistema de plantio direto, sobre a cobertura do solo e a produção de biomassa das coberturas de inverno, sobre a biomassa de plantas espontâneas de verão, no período crítico de competição, e sobre a produtividade do feijão, cv Guará. O experimento foi instalado em delineamento experimental constituído por blocos ao acaso com quatro repetições. Observaram-se as maiores percentagens de cobertura do solo no inverno, com os tratamentos centeio + ervilhaca, centeio + ervilhaca + nabo forrageiro e aveia + ervilhaca; a produção de biomassa de cobertura foi maior com centeio + ervilhaca + nabo forrageiro. O efeito de supressão observado foi...
Palavras-chave: 5.01.03.04-0    Produção de Mudas plantio direto; Plantas espontâneas; Rendimento; Conservação do solo. Fitotecnia no-tillage; Spontaneous plants; Yield; Soil conservation.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/988

Lâminas de irrigação e estações anuais na cobertura do solo e altura de gramíneas cultivadas sob corte - DOI: 10.4025/actasciagron.v31i3.381
Provedor de dados: 1
Autores: Alencar, Carlos Augusto Brasileiro de; UFV; Oliveira, Rubens Alves de; UFV; Martins, Carlos Eugênio; EMBRAPA; Cóser, Antônio Carlos; EMBRAPA; Figueiredo, José Luis Aguiar; UFV; Cunha, Fernando França da; UFV.
Objetivou-se avaliar a cobertura do solo e altura de planta em seis gramíneas manejadas por corte sob efeito de diferentes lâminas de irrigação e estações do ano. O experimento foi conduzido em esquema de parcelas subsubdivididas, tendo seis gramíneas (Xaraés, Mombaça, Tanzânia, Pioneiro, Marandu e Estrela) nas parcelas, seis lâminas de irrigação (0, 18, 45, 77, 100 e 120% da referência) nas subparcelas e as estações (outono/inverno e primavera/verão) nas subsubparcelas. Para diferenciar a aplicação das lâminas de irrigação, utilizou-se o sistema por aspersão em linha. Observou-se efeito das gramíneas, estações anuais e lâminas de irrigação nas duas características estudadas. O capim-Pioneiro apresentou a maior altura e o capim-Estrela a maior cobertura ao...
Palavras-chave: 5.01.00.00-9    Agronomia sistema em aspersão em linha; Conservação do solo; B. brizantha; P. maximum; P. purpureum; C. nlemfuensis line source sprinkler system; Soil conservation; B. brizantha; P. maximum; P. purpureum; C. nlemfuensis.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/381

Heavy metal concentrations and ecological risk assessment of the suspended sediments of a multi-contaminated Brazilian watershed
Provedor de dados: 1
Autores: Silva, Yuri Jacques Agra Bezerra da; Cantalice, José Ramon Barros; Singh, Vijay Pal; Nascimento, Clístenes Williams Araújo do; Wilcox, Bradford Paul; Silva, Ygor Jacques Agra Bezerra da.
Metal concentrations in suspended sediments of one of the most polluted rivers in Brazil were measured. Concentrations of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn were determined by inductively coupled plasma while Hg and As were analyzed with hydride generation flow injection atomic absorption spectroscopy. Contamination of As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn was assessed using pollution indices, ecological risk assessment, statistical multivariate techniques and comparison with sediment quality guidelines. Suspended sediments of the upstream portion of the Ipojuca River are moderately contaminated, especially with Mn and As. On the other hand, sediments of the downstream section are highly contaminated, mainly with Zn, Pb, and As. Furthermore, the mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: River pollution; Soil conservation; Sediment quality; Trace elements.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42620

Altura de capins e cobertura do solo sob adubação nitrogenada, irrigação e pastejo nas estações do ano - DOI: 10.4025/actasciagron.v32i1.319
Provedor de dados: 1
Autores: Alencar, Carlos Augusto Brasileiro de; UFV; Cóser, Antônio Carlos; Embrapa - Juiz de Fora; Martins, Carlos Eugênio; Embrapa - Juiz de Fora; Oliveira, Rubens Alves de; UFV; Cunha, Fernando França da; UFV; Figueiredo, José Luis Aguiar; UFV.
Objetivou-se avaliar a altura de planta e a cobertura do solo de seis capins irrigados manejados por pastejo sob efeito de diferentes adubações nitrogenadas e estações do ano. O experimento foi conduzido em esquema de parcelas subdivididas, tendo nas parcelas um esquema fatorial 4 x 6 (doses de nitrogênio e forrageiras) e nas subparcelas as estações do ano (outono/inverno e primavera/verão) no delineamento em blocos casualizados, com quatro repetições. As doses nitrogenadas foram de 100, 300, 500 e 700 kg há-1 ano-1, e as forrageiras foram: Xaraés, Mombaça, Tanzânia, Pioneiro, Marandu e Estrela. A altura foi medida desde o solo até as extremidades das folhas e a cobertura estimada visualmente por três observadores. Observou-se efeito dos capins, adubação...
Palavras-chave: 5.01.00.00-9    Agronomia Brachiaria brizantha; Panicum maximum; Pennisetum purpureum; Cynodon nlemfuensis; Conservação do solo Brachiaria brizantha; Panicum maximum; Pennisetum purpureum; Cynodon nlemfuensis; Soil conservation.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/319

Assessing rainfall erosivity indices through synthetic precipitation series and artificial neural networks
Provedor de dados: 42
Autores: CECíLIO,ROBERTO A.; MOREIRA,MICHEL C.; PEZZOPANE,JOSé EDUARDO M.; PRUSKI,FERNANDO F.; FUKUNAGA,DANILO C.
The rainfall parameter that expresses the capacity to promote soil erosion is called rainfall erosivity (R), and is commonly represented by the indexes EI30 and KE&gt;25. The calculations of these indexes requires pluviographical records, that are difficult to obtain in Brazil. This paper describes the use of synthetic rainfall series to compute EI30 and KE&gt;25 in Espírito Santo State (Brazil). Artificial neural networks (ANNs) were also developed to spatially interpolate R values in Espírito Santo. EI30 and KE&gt;25 indexes values were close to those calculated on a homogeneous area according to the similarity of rainfall distribution; indicating the applicability of the use of synthetic rainfall series to estimate the R factor. ANNs had a better...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Interpolation; Rainfall generator; Soil conservation; Universal soil loss equation.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000401523

Water Erosion Prediction Using the Revised Universal Soil Loss Equation (RUSLE) in a GIS Framework, Central Chile
Provedor de dados: 117
Autores: Bonilla,Carlos A; Reyes,José L; Magri,Antoni.
Soil erosion is a growing problem in Central Chile, particularly in coastal dry lands, where it can significantly decrease the productivity of rainfed agriculture and forestry. In this study, the Revised Universal Soil Loss Equation (RUSLE) was integrated into a Geographic Information System (GIS), and used to evaluate the effects of different combinations of vegetative cover on soil erosion rates for Santo Domingo County in Central Chile. Implementing RUSLE in the GIS required a complete description of the county’s soils, climate, topography and current land use/land cover. This information was compiled in rasters of 25 x 25 m cells. RUSLE parameter values were assigned to each cell and annual soil loss estimates were generated on a cell by cell basis....
Tipo: Journal article
Palavras-chave: RUSLE; Water erosion; Soil conservation; Forestry; Changes in land use/land cover; Central Chile.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100017

Estimates of soil losses by the erosion potential method in tropical latosols
Provedor de dados: 64
Autores: Lense,Guilherme Henrique Expedito; Parreiras,Taya Cristo; Moreira,Rodrigo Santos; Avanzi,Junior Cesar; Mincato,Ronaldo Luiz.
ABSTRACT Water erosion is one of the main problems faced in coffee cultivation, as it promotes environmental degradation and crop yield decrease. Erosion estimates support the planning of conservation management practices and allowing determining the rates of soil losses. Thus, the objective of this paper was to estimate the soil loss by water erosion using the Erosion Potential Method in a sub-basin predominantly covered by coffee cultivation and then to compare the results with the Soil Loss Tolerance limits. The study area is the Coroado Stream Sub-basin, located at Alfenas Municipality, south of Minas Gerais, Brazil. The sub-basin presented an Erosion Coefficient of 0.272, indicating a predominance of low-intensity erosion. The total soil loss estimate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Water erosion; Modeling.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100225

Soil cover plants on water erosion control in the South of Minas Gerais
Provedor de dados: 64
Autores: Dias,Adriana Cristina; Silva,Marx Leandro Naves; Freitas,Diego Antonio França de; Batista,Pedro Velloso Gomes; Curi,Nilton; Carvalho,Gabriel José de.
Water erosion is responsible for soil, water, carbon and nutrient losses, turning into the most important type of degradation of Brazilian soils. This study aimed to evaluate the influence of three cover plants under two tillage systems on water erosion control in an Argisol at south of Minas Gerais state, Brazil. The cover plants utilized in the study were pigeon pea, jack bean and millet, under contour seeding and downslope tillage. Experimental plots of 4 x 12 m, with 9% slope, under natural rainfall were used for the quantification of losses of soil, water, nutrients, and organic matter. One experimental plot was kept without plant cover (reference). Higher erosivity was observed in December and January, although a great quantity of erosive rainfall...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Tillage systems; Vegetal cover; Erosivity.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500004

Estimation of sediments produced in a subbasin using the Normalized Difference Vegetation Index
Provedor de dados: 64
Autores: Lense,Guilherme Henrique Expedito; Moreira,Rodrigo Santos; Bócoli,Fernanda Almeida; Avanzi,Junior Cesar; Teodoro,Alexandre Elias de Miranda; Mincato,Ronaldo Luiz.
ABSTRACT Among the parameters considered by the Revised Universal Soil Loss Equation (RUSLE), the soil cover and management factor (C) is the main human influenced factor affecting the estimation of water erosion, and one of the most sensitive to spatiotemporal variations. Consequently, this study aims to compare the efficiency of C factor estimates obtained from the literature for each land-use class (Clit) and by calculation based on the Normalized Difference Vegetation Index (CNDVI). We test the hypothesis that soil loss estimates based on CNDVI approach are more accurate than those based on Clit. Water erosion was estimated based on soil morphological, physical, and chemical properties in addition to climate, relief, management practices, and land use...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil conservation; Water erosion; Modeling; RUSLE.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542020000100214