Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 37
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
Agregação de um latossolo vermelho sob diferentes sistemas de manejos e de cultivos em Mato Grosso do Sul. Infoteca-e
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
Imagem não selecionada

Imprime registro no formato completo
An analytical framework for soil degradation, farming practices, institutions and policy responses AgEcon
Prager, Katrin; Schuler, Johannes; Helming, Katharina; Zander, Peter; Ratinger, Tomas; Hagedorn, Konrad.
There is a lack of knowledge about the effectiveness and efficiency of soil conservation policies in agriculture and little understanding of how policy measures should be designed to encourage farmers to adopt soil conservation practices. This paper analyzes institutional settings surrounding agricultural soil management in ten European countries based on the Institutions of Sustainability framework. This framework considers the interdependencies between ecological and social systems, taking into account environmental conditions, farming practices impacting on soil conservation, different types of actors, policies, institutions and governance structures. The purpose of this paper is to describe the analytical framework and the methodology that all case...
Tipo: Conference Paper or Presentation Palavras-chave: Institutional analysis; Soil degradation; Soil conservation policy; Soil conservation measures; Farming practices; Policy evaluation; Farm Management.
Ano: 2011 URL: http://purl.umn.edu/114773
Imagem não selecionada

Imprime registro no formato completo
Changes in attributes of soils subjected to fallow in desertification hotspot Rev. Ciênc. Agron.
Ferreira,Mirele Paula da Silva; Artur,Adriana Guirado; Queiroz,Hermano Melo; Romero,Ricardo Espíndola; Costa,Mirian Cristina Gomes.
ABSTRACT Soils in semi-arid regions have been degraded by overgrazing, which reduces the production capacity and, in certain situations, leads to desertification. An alternative to recover degraded areas is the fallow period, which works through the resilience of the soil itself, increasing the supply of organic matter and improving soil physical properties. Thus, the objective of this study was to test the hypothesis that 14-year grazing exclusion improves soil physical and chemical attributes in degraded areas under desertification. The study was conducted in Irauçuba, Ceará State, Brazil. The experimental design was completely randomized, in a 4 x 2 factorial scheme corresponding to four areas and two managements (overgrazing and fallow), with four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil organic carbon; Soil degradation; Semi-arid region; Overgrazing.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000100022
Imagem não selecionada

Imprime registro no formato completo
Coutry Profile Environment Ghana OceanDocs
This report presents information on the Environment of the Country in the following arrangement: 1 Keywords 2 Fact Sheet 3 Organization 4 Current Environmental Issues 5 International Relations 6 Information Sources 7 References
Tipo: Other Palavras-chave: Environmental surveys; Pollution; Sanitation; Soil degradation; Deforestation; Http://aims.fao.org/aos/agrovoc/c_14073; Http://aims.fao.org/aos/agrovoc/c_7168; Http://aims.fao.org/aos/agrovoc/c_15590.
Ano: 1999 URL: http://hdl.handle.net/1834/658
Imagem não selecionada

Imprime registro no formato completo
Economic impact of land degradation (salt affected and waterlogged soils) on rice production in Pakistan's Punjab International Rice Research Institute
Mustafa, Usman.
102 leaves : ill. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Crop production; Economic impact; Soil degradation; Saline soils; Flooded conditions; Pakistan.
Ano: 1991 URL: http://hdl.handle.net/123456789/936
Imagem não selecionada

Imprime registro no formato completo
Establishment of homogeneous zones in a soil of alluvial origin Ciência e Agrotecnologia
Jaramillo-Barrios,Camilo Ignacio; Ortiz-Rico,Andrés Felipe; Carrillo,Gustavo Alfonso Araujo; Varón-Ramírez,Viviana Marcela.
ABSTRACT Soils have the ability to maintain plant growth and biological activity due to their physical and chemical properties. The aim of this study was to observe the spatial distribution of some chemical properties of the soil, such as pH, organic matter (OM), electrical conductivity (EC), effective cation exchange capacity (ECEC), sulfur (S) and aluminum (Al) content and to establish zones with homogeneous chemical characteristics using the MULTISPATI-PCA technique and the fuzzy c-means algorithm. The study area was located in the Tundama and Sugamuxi Valleys (Boyacá, Colombia) with an area of ​​8,017 ha. Chemical properties such as pH, OM, EC, S, Al, and ECEC were indicators of the chemical degradation of these soils. Four homogeneous zones were...
Palavras-chave: Geostatistics; Semivariogram; Soil degradation; Multispati-PCA; Spatial distribution..
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100216
Imagem não selecionada

Imprime registro no formato completo
Farmers' Practices and Soil and Water Conservation Programs Open Agri
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
Imagem não selecionada

Imprime registro no formato completo
Farming Systems Principles Open Agri
Palavras-chave: Genetic soil types; Soil degradation; Farming systems; Cropping systems; Tropical zones; Arid zones; Pigeonpeas; Intercropping; Fallow systems; Land resources.
Ano: 1986 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4037
Imagem não selecionada

Imprime registro no formato completo
Fertility and acidity status of latossolos (oxisols) under pasture in the Brazilian Cerrado Anais da ABC (AABC)
Vendrame,Pedro R.S.; Brito,Osmar R.; Guimarães,Maria F.; Martins,Éder S.; Becquer,Thierry.
The Cerrado region, with over 50 million hectares of cultivated pasture, provides 55% of Brazilian beef production. Previous investigations have shown that about 70-80% of this pasture is affected by some kind of degradation, leading to low productivity. However, until now, few surveys have been carried out on a regional scale. The aim of the present work is both to assess the fertility and acidity levels of Cerrado soils under pasture and compare the variability of the soils characteristics on a regional scale. Two soil depths were sampled in different places within the studied area: (1) a surface horizon (0.0-0.2 m) in order to evaluate its fertility and acidity status for pasture, and (2) a subsurface horizon (0.6-0.8 m), used for classification. Most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cation exchange capacity; Exchangeable aluminum; Phosphorus availability; Soil degradation; Total carbon.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400026
Imagem não selecionada

Imprime registro no formato completo
Food security and sustainable agriculture in India: The water management challenge AgEcon
Kumar, M. Dinesh.
Tipo: Working or Discussion Paper Palavras-chave: Sustainable agriculture; Food security; Water management; Water scarcity; Groundwater depletion; Waterlogging; Salinity; Soil degradation; Water use efficiency; Productivity; Equity; Irrigation water; Pricing; Agricultural and Food Policy; Agricultural Finance; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2003 URL: http://purl.umn.edu/92666
Imagem não selecionada

Imprime registro no formato completo
Future of Agriculture in the Semi-Arid Tropics Open Agri
M.C.S..
Palavras-chave: Water harvesting; Land resources; Tropical zones; Policies; Products; Biotechnology; Soil degradation; Sustainable agriculture; Electrophoresis; Agricultural trade.
Ano: 2001 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3696
Imagem não selecionada

Imprime registro no formato completo
Influence of field slope and coffee plantation age on the physical properties of a red-yellow Latosol Rev. Bras. Ciênc. Solo
Iori,Piero; Dias Junior,Moacir de Souza; Ajayi,Ayodele Ebenezer; Guimarães,Paulo Tácito Gontijo; Abreu Júnior,Áureo Aparecido.
In modern agriculture, several factors cause changes in the soil physical properties. The time of establishment of a crop (plantation age) and the slope are examples of factors that moderate the impact of mechanized operations on the soil structure. The objective of this study was to analyze the effect of machinery traffic on the physical properties of a Red-Yellow Latosol under coffee plantations with different ages (2, 7, 18, and 33 years) and slope positions (3, 9 and 15 %). Samples were collected from three positions between coffee rows (lower wheel track, inter-row and upper wheel track) and at two depths (surface layer and sub-surface). Changes in the total porosity, macroporosity, microporosity, organic matter, bulk density, and aggregate stability...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agricultural traffic; Coffea arabica L.; Soil degradation; Aggregate stability.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000100010
Imagem não selecionada

Imprime registro no formato completo
Integrated management of watersheds for agricultural diversification and sustainable livelihoods in Eastern and Central Africa Open Agri
B..
Palavras-chave: Watersheds; Watershed management; Agroecosystems; Strategies; Land improvement; Policies; Resources; Soil degradation; Pigeonpeas; Terrace cropping.
Ano: 2006 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4236
Imagem não selecionada

Imprime registro no formato completo
Integrated management of watersheds for agricultural diversification and sustainable livelihoods in Eastern and Central Africa: lessons and experiences from semi-arid South Asia: proceedings of the International Workshop Open Agri
Shiferaw, B..
Palavras-chave: Watersheds; Watershed management; Agroecosystems; Strategies; Land improvement; Policies; Resources; Soil degradation; Pigeonpeas; Terrace cropping.
Ano: 2006 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3154
Imagem não selecionada

Imprime registro no formato completo
Mais pastagens, menos devastação: tecnologia permite redução de queimadas na formação de pastagens. Infoteca-e
VALENTIM, J. F..
O estado do Acre, com 152.589 km2, tem como cobertura vegetal predominante a floresta tropical úmida aberta (77%) e densa (14%) (IBDF, 1984). A ocupação da Amazônia e do Acre, em particular, a partir da década de 60, tem sido um processo dirigido através de programas dos governos estadual e federal. Esta ocupação tem como objetivo resolver problemas de natureza social, econômica e política. A relativa escassez de conhecimentos científicos disponíveis sobre os mecanismos que garantem a sobrevivência da floresta pluvial tropical, predominante na região, está longe de permitir que se possa recomendar a exploração, em grande escala e ecologicamente segura, desse fantástico bioma.
Tipo: Artigo de divulgação na mídia (INFOTECA-E) Palavras-chave: Acre; Amazônia Ocidental; Western amazon.; Degradação do solo; Amazonia occidental; Cultivo mixto; Deforestación; Degradación del suelo; Incendios forestales; Leguminosas forrajeras; Regeneración forestal; Variedades de rendimiento elevado; Floresta; Desmatamento; Queimada; Incêndio florestal; Recuperação do solo; Pastagem consorciada; Leguminosa forrageira; Kudzu; Pueraria phaseoloides; Variedade resistente.; Soil degradation; Deforestation; Forest fires; Forest regeneration; Mixed cropping; Forage legumes; High-yielding varieties; Amazónia..
Ano: 1989 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/510563
Imagem não selecionada

Imprime registro no formato completo
Management zones determination based on physical properties of the soil Ciência e Agrotecnologia
Varón-Ramírez,Viviana Marcela; Camacho-Tamayo,Jesús Hernán; González-Nivia,Janeth.
ABSTRACT The physical characteristics of the soil are defined through the interaction between its properties, and they, in turn, can indicate its physical quality. The study area is located in the Centro Agropecuário Marengo (Marengo Agricultural Center), with an extension of 94.5 ha, subdivided into 17 plots. The objective of this research was to study characteristics such as water storage capacity, structure, consistency, and soil compaction in the two surface horizons (H1 and H2), in order to define management zones through the soil index. Properties such as soil penetration resistance were an indicator of soil degradation, with values higher than 2 MPa in 13 plots. The total porosity exhibited medium or low values in the H1 and H2 horizons, with a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil degradation; Soil compaction; Soil water storage; Soil index..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542018000300248
Imagem não selecionada

Imprime registro no formato completo
Mapping drought patterns and impacts: a global perspective AgEcon
Eriyagama, Nishadi; Smakhtin, Vladimir U.; Gamage, Nilantha.
The study examines the global pattern and impacts of droughts through mapping several drought-related characteristics - either at a country level or at regular grid scales. It appears that arid and semi-arid areas also tend to have a higher probability of drought occurrence. It is illustrated that the African continent is lagging behind the rest of the world on many indicators related to drought-preparedness and that agricultural economies, overall, are much more vulnerable to adverse societal impacts of meteorological droughts. The study also examines the ability of various countries to satisfy their water needs during droughts using storage-related indices.
Tipo: Report Palavras-chave: Drought; Impact assessment; Indicators; Hydrology; Mapping; Climate change; River basins; Dams; Water scarcity; Disasters; Risks; Precipitation; Runoff; Soil degradation; Agricultural and Food Policy; Land Economics/Use.
Ano: 2009 URL: http://purl.umn.edu/57027
Imagem não selecionada

Imprime registro no formato completo
Methods for assessing the impacts of natural resource management research Open Agri
B..
Palavras-chave: Watersheds; Soil degradation; Watershed management; Assets; Policies; Land resources; Water quality; Economics; Water harvesting; Investment.
Ano: 2003 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4231
Imagem não selecionada

Imprime registro no formato completo
Mucorales from the semiarid of Pernambuco, Brazil BJM
Santiago,André Luiz Cabral Monteiro de Azevedo; Santos,Paulo Jorge Parreira dos; Maia,Leonor Costa.
Nineteen taxa of Mucorales, belonging to Absidi, Apophysomyces, Cunninghamella, Fennellomyces, Lichtheimi, Mucor, Mycotypha, Rhizopus and Syncephalastrum were isolated from 36 composite soil samples in three semiarid areas in the State of Pernambuco (Triunfo, Cabrobó and Belém de São Francisco), Northeast Brazil, which are characterized by Caatinga vegetation. Triunfo is preserved, whereas Cabroró and Belém de São Francisco are experiencing low and severe desertification processes, respectively. Mucorales were isolated in Petri dishes in triplicate from 5 mg samples of soil placed on the surface of wheat germ agar plus chloramphenicol and Cercobin [Dimethyl 4,49-(103 phenylene) bis (3-thioallophanate)] medium. The plates were left on a bench at room...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Caatinga; Mucoromycotina; Soil degradation; Taxonomy.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100044
Imagem não selecionada

Imprime registro no formato completo
Multiperspective analysis of erosion tolerance Scientia Agricola
Sparovek,Gerd; De Maria,Isabella Clerici.
Erosion tolerance is the most multidisciplinary field of soil erosion research. Scientists have shown lack in ability to adequately analyze the huge list of variables that influence soil loss tolerance definitions. For these the perspectives of erosion made by farmers, environmentalists, society and politicians have to be considered simultaneously. Partial and biased definitions of erosion tolerance may explain not only the polemic nature of the currently suggested values but also, in part, the nonadoption of the desired levels of erosion control. To move towards a solution, considerable changes would have to occur on how this topic is investigated, especially among scientists, who would have to change methods and strategies and extend the perspective of...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Soil erosion; Soil degradation; Land use planning.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200029
Registros recuperados: 37
Primeira ... 12 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional