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A Rainfall Simulator for the in situ Study of Superficial Runoff and Soil Erosion Chilean J. Agric. Res.
Sangüesa,Claudia; Arumí,José; Pizarro,Roberto; Link,Oscar.
A rainfall simulator is an important tool for the study of runoff generation and soil loss because it can be used either under laboratory conditions, or in disturbed or natural soil. The objective of this study was to describe the design and operation of a rainfall simulator to evaluate soil loss in situ. The rainfall simulator has four full-cone spray nozzles with a Unijet system mounted in a straight line pipe configuration, and easily transported and assembled. Simulated rainfall uniformity was evaluated in the laboratory, whereas the applicability of the simulator in natural soil erosion plot conditions in an experimental field with different slopes was tested by quantifying runoff and evaluating soil erosion. Twenty simulations were carried out in the...
Tipo: Journal article Palavras-chave: Soil erosion; Superficial runoff; Erosion plot; Uniformity of rain.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100019
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Adoption and diffusion of no tillage practices in Southern Spain olive groves AgEcon
Franco, Juan Agustin; Calatrava-Requena, Javier.
This paper analyses the process of adoption of no tillage in South-eastern Spain’s olive groves. Olive tree groves in South-eastern Spain’s mountainous areas are subject to a high risk of soil erosion, which is the main environmental problem for this crop, and have to incur in high costs of soil conservation. This results in a greater difficulty to comply with the practices required to benefit from both the single payment and agri-environmental schemes. In many high-steeped areas, farmers have opted for non-tillage practices as an alternative to other conservation practices. Using our own data from a survey carried out in 2006 among 215 olive tree farmers from the Granada Province in Southern Spain regarding the adoption of soil conservation and management...
Tipo: Conference Paper or Presentation Palavras-chave: Spanish olive groves; Soil erosion; No tillage; Crop Production/Industries; Land Economics/Use.
Ano: 2008 URL: http://purl.umn.edu/44014
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Adoption of Soil Erosion Control Practices in Southern Spain Olive Groves AgEcon
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
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Agricultural Resources and Environmental Indicators, 2006 Edition AgEcon
Wiebe, Keith D.; Gollehon, Noel R..
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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
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Agri-Environmental Policy at the Crossroads: Guideposts on a Changing Landscape AgEcon
Claassen, Roger; Hansen, LeRoy T.; Peters, Mark; Breneman, Vincent E.; Weinberg, Marca; Cattaneo, Andrea; Feather, Peter; Gadsby, Dwight M.; Hellerstein, Daniel; Hopkins, Jeffrey W.; Johnston, Paul V.; Morehart, Mitchell J.; Smith, Mark.
Agri-environmental policy is at a crossroads. Over the past 20 years, a wide range of policies addressing the environmental implications of agricultural production have been implemented at the Federal level. Those policies have played an important role in reducing soil erosion, protecting and restoring wetlands, and creating wildlife habitat. However, emerging agri-environmental issues, evolution of farm income support policies, and limits imposed by trade agreements may point toward a rethinking of agri-environmental policy. This report identifies the types of policy tools available and the design features that have improved the effectiveness of current programs. It provides an indepth analysis of one policy tool that may be an important component of a...
Tipo: Report Palavras-chave: Conservation programs; Environmental policy; Agricultural policy; Policy instruments; Agricultural program design; Soil erosion; Nitrogen runoff; Environmental Economics and Policy.
Ano: 2001 URL: http://purl.umn.edu/33983
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An Application of Mixed Logit Estimation in the Analysis of Producers’ Stated Preferences AgEcon
Kipperberg, Gorm; Bond, Craig A.; Hoag, Dana L..
This paper analyzes Colorado Corn producers’ preferences over both private- and environmental public-good production system attributes. Current production practices are characterized by intensive water and chemical use, resulting in non-point source pollution to water bodies as well as soil erosion problems. Data from a stated preference survey are employed to analyze key attributes of experimentally configured irrigation systems, proposed as alternatives to current practices. Panel mixed logit estimations find positive preferences for profit, risk reduction, and, importantly, systems with less environmental impact in terms of nitrate leaching and soil erosion. The results also find presence of significant preference heterogeneity and a complementary...
Tipo: Working or Discussion Paper Palavras-chave: Agricultural production; Profit-maximization; Environment; Mixed logit; Stated preference; Attribute part-worth; Nitrate leaching; Soil erosion; Risk; Crop Production/Industries; C10; D62; Q12; Q15; Q51.
Ano: 2008 URL: http://purl.umn.edu/108719
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An Econometric Analysis of the Environmental Benefits Provided by the Conservation Reserve Program AgEcon
Fleming, Ronald A..
Over $1.7 billion has been spent on the Conservation Reserve Program (CRP) since 1985. The purpose of this study is to show that these expenditures have aided the environment. Rather than quantify changes in environmental variables, a spatial econometric model is used to test if CRP enrollments are greater in counties with poorer environmental quality. In seven of nine regions, CRP enrollments are higher in counties with an environmental concern. This positive finding justifies past expenditures by the CRP and supports continued funding as an environmental program. The CRP is targeting current environmental concerns that will lead to future improvement.
Tipo: Journal Article Palavras-chave: Conservation Reserve Program; Econometrics; Environmental quality; Soil erosion; Spatial data; Water quality; Wildlife habitat; Q28; Q58; C31; Q24; Q25.
Ano: 2004 URL: http://purl.umn.edu/43388
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AN EVALUATION OF POST CONSERVATION RESERVE PROGRAM ALTERNATIVES IN THE TEXAS HIGH PLAINS AgEcon
Johnson, Phillip N.; Segarra, Eduardo.
Four policy alternatives for CRP lands upon expiration of the current contracts in Hale county, Texas are evaluated using chance-constrained programming. It was found that if CRP contracts are extended at the current average rental rate, 40 percent of the current enrollment would be expected to return to crop production, while 66 percent would return to crop production if the program were eliminated. The results also indicate that the marginal value of CRP payments to producers is lower than the marginal value of deficiency payments.
Tipo: Journal Article Palavras-chave: Conservation Reserve Program; Chance-constrained programming; Soil erosion; Land Economics/Use.
Ano: 1995 URL: http://purl.umn.edu/15275
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An Ex Post Evaluation of the Conservation Reserve, Federal Crop Insurance, and Other Government Programs: Program Participation and Soil Erosion AgEcon
Smith, Vincent H.; Goodwin, Barry K..
Recent research has questioned the extent to which government policies, including conservation and risk management programs, have influenced environmental indicators. The impacts of income-supporting and risk management programs on soil erosion are considered. An econometric model of the determinants of soil erosion, program participation, conservation effort, and input usage is estimated. While the Conservation Reserve Program has reduced erosion an average of 1.02 tons per acre from 1982 to 1992, approximately half of this reduction has been offset by increased erosion resulting from government programs other than federally subsidized crop insurance.
Tipo: Journal Article Palavras-chave: Conservation Reserve Program; Farm policy; Soil erosion; Agricultural and Food Policy.
Ano: 2003 URL: http://purl.umn.edu/31090
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ASSESSING CHANGES IN SOIL EROSION RATES: A MARKOV CHAIN ANALYSIS AgEcon
Skaggs, Rhonda K.; Ghosh, Soumen.
Markov chain analysis (one-step and long-run) is applied to the National Resources Inventory (NRI) database to evaluate changes in wind-based soil erosion rates over time. The research compares changes in soil erosion rates between NRI sample sites with and without applied conservation practices for a random sample of Great Plains counties. No significant differences between sites are found for half of the counties evaluated. The effectiveness and efficiency of conservation policies are thus questioned in light of these research results.
Tipo: Journal Article Palavras-chave: Conservation; Markov; National Resources Inventory; Policy; Soil erosion; Land Economics/Use.
Ano: 1999 URL: http://purl.umn.edu/15146
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ASSESSING THE COSTS AND ENVIRONMENTAL CONSEQUENCES OF AGRICULTURAL LAND USE CHANGES: A SITE-SPECIFIC, POLICY-SCALE MODELING APPROACH AgEcon
Wu, JunJie; Adams, Richard M.; Kling, Catherine L.; Tanaka, Katsuya.
The growth in federal conservation programs has created a need for policy modeling frameworks capable of measuring micro-level behavioral responses and macro-level landscape changes. This paper presents an empirical model that predicts crop choices, crop rotations, and conservation tillage adoption as a function of conservation payment levels, profits, and other variables at more than 42,000 agricultural sites of the National Resource Inventory (NRI) in the Upper Mississippi River Basin. Predicted changes in crop choices and tillage practices are then fed into site-specific environmental production functions to determine changes in nitrate runoff and leaching and in water and wind erosion at each NRI site. This policy-scale model is applied to the case of...
Tipo: Working or Discussion Paper Palavras-chave: Agricultural policy; Conservation practices; Green payments; Land use changes; Nitrate runoff and leaching; Non-point pollution; Soil erosion; Environmental Economics and Policy; Land Economics/Use.
Ano: 2003 URL: http://purl.umn.edu/18475
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Avaliacao de metodos indiretos de determinacao da erodibilidade de latossolos brasileiros. Repositório Alice
SILVA, M.L.N.; CURI, N.; LIMA, J.M. de; FERREIRA, M.M..
Existem três maneiras de se determinar a erodibilidade do solo (Fator K). A primeira envolve a determinação do fator K em condições de campo, sob chuva natural, a qual é onerosa e muito demorada. O segundo método é semelhante ao primeiro, porém baseia-se na quantificação do fator K em razão das perdas de solo e do fator erosividade, sob condições de chuva simulada. O terceiro método baseia-se em regressões múltiplas que contenham, como variáveis independentes, atributos do solo correlacionados com o fator K obtido pelos dois métodos anteriores, tidos como padrões. A carência de dados básicos e a indefinição do melhor método para determinação da erodibilidade de maneira indireta, que possibilite enquadrar os solos em classes de resistência à erosão,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Erosao; Analise de solo; Soil erosion; Soil analysis.
Ano: 2000 URL: http://www.alice.cnptia.embrapa.br/handle/doc/102073
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Beyond conservation agriculture. Repositório Alice
GILLER, K. E.; ANDERSSON, J. A.; CORBEELS, M.; KIRKEGAARD, J.; MORTENSEN, D.; ERENSTEIN, O.; VANLAUWE, B..
ABSTRACT: Global support for Conservation Agriculture (CA) as a pathway to Sustainable Intensification is strong. CA revolves around three principles: no-till (or minimal soil disturbance), soil cover, and crop rotation. The benefits arising from the ease of crop management, energy/cost/time savings, and soil and water conservation led to widespread adoption of CA, particularly on large farms in the Americas and Australia, where farmers harness the tools of modern science: highly-sophisticated machines, potent agrochemicals, and biotechnology. Over the past 10 years CA has been promoted among smallholder farmers in the (sub-) tropics, often with disappointing results. Growing evidence challenges the claims that CA increases crop yields and builds-up soil...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Sustainable intensification; Intensificação sustentável; Climate smart agriculture; Agricultura de clima inteligente; Erosão; Legume; Sistemas agrícolas; Soil erosion; Legumes; Systems agronomy.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1051465
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Cobertura vegetal e perdas de solo por erosão em diversos sistemas de melhoramento de pastagens nativas. Repositório Alice
BONO, J. A. M.; CURI, N.; FERREIRA, M. M.; EVANGELISTA, A. R.; CARVALHO, M. M.; SILVA, M. L. N..
1996
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cobertura vegetal; Erosão; Pastagem nativa; Vegetation cover; Soil erosion; Meadows.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/handle/doc/334349
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Controle dos processos erosivos lineares (ravinas e voçorocas) em áreas de solos arenosos. Infoteca-e
FILIZOLA, H. F.; ALMEIDA FILHO, G. S. de; CANIL. K.; SOUZA, M. D. de; GOMES, M. A. F..
A erosão acelerada, ou erosão antrópica, é um problema mundial. Vastas áreas estão sujeitas à degradação do solo, às vezes de forma irreversível, por uma série de processos como erosão e desertificação acelerada, compactação e selamento, salinização, acidificação, diminuição da matéria orgânica e da fertilidade do solo e redução da biodiversidade (LAL, 1994). O controle dos processos erosivos deve estar fundamentado em princípios básicos de manejo de solos com o propósito de evitar o impacto das gotas de chuva, facilitar a infiltração de água no solo, e disciplinar o escoamento superficial, seja ele difuso ou, em especial, concentrado,
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Ravina; Voçoroca; Controle da erosão; Erosão do solo; Soil erosion; Erosion control.
Ano: 2011 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/915009
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Development of organic matter in soils of natural phytocoenoses and agrocoenoses JARTS
Akramov, Y.; Drauschke, W.; Bojmurodov, R..
The brown mountain carbonate soils covering the “yadiere” (hills) in the Gissarska valley of Tadzhikistan have relatively high humus portions. The humus content in the upper layers of sedentary soils was found to range from 2.70 to 3.18 per cent. However, in eroded soils the humus content declines from 1.35-0.83 per cent to levels as low as 0.57-0.75 per cent. The decrease of humus substances in erodible soils is mainly dependent on their slope exposure. Soils on sites sloping to north revealed the highest humus content whilst soils on east and west slopes and, in particular, on south slopes were found to have the lowest humus content. Sprinkler irrigation applied to soils on sloping sites, following grass seeding, was found to result in swift growth and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil sciences humus content; Soil erosion; Slope exposure; Humic acid; SGK:SFK ratio; Tadzhikistan.
Ano: 2003 URL: http://www.jarts.info/index.php/jarts/article/view/35
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Diagnóstico do meio físico dos reassentamentos rurais da Usina Hidrelétrica de Manso, Município de Chapada dos Guimarães, Estado de Mato Grosso. Infoteca-e
CALDERANO FILHO, B.; ANDRADE, A. G. de; MANZATTO, C. V.; CALDERANO, S. B.; DONAGEMMA, G. K.; MIRANDA, E. A.; PEREIRA, L. A.; MELLO, J. B. de; COSTA, M. R. da; SOUZA, J. S. de.
O diagnóstico do meio físico dos reassentamentos rurais no entorno do reservatório da usina hidrelétrica de Manso, no município de Chapada dos Guimarães, teve o objetivo de caracterizar e analisar a estrutura da paisagem, incluindo aspectos físicos e ecológicos, para o planejamento e manejo conservacionista da área. Os procedimentos utilizados envolveram a geração de dados básicos no campo, por meio de mapeamentos temáticos do meio físico, sendo produzidos mapas de solos, relevo, declividade e uso da terra, incluindo vegetação, hidrografia e avaliação da aptidão agrícola das terras. Os resultados produzidos fornecem subsídios básicos para o planejamento e manejo adequado dos recursos solo e água e contribuem para a elaboração do plano de manejo...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Manejo do Solo; Erosão do Solo; Recurso do Solo; Manejo de Água; Soil management; Soil erosion; Soil resources; Water management.
Ano: 2006 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1108236
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Drivers of Ecological Restoration: Lessons from a Century of Restoration in Iceland Ecology and Society
Aradóttir, Ása L.; Faculty of Environmental Sciences, Agricultural University of Iceland; asa@lbhi.is; Petursdottir, Thorunn; Soil Conservation Service of Iceland; Institute for Environment and Sustainability (IES), European Commission, Joint Research Centre (JRC); thorunn.petursdottir@land.is; Halldorsson, Gudmundur; Soil Conservation Service of Iceland; gudmundur.halldorsson@land.is; Svavarsdottir, Kristin; Soil Conservation Service of Iceland; kristin.svavarsdottir@land.is; Arnalds, Olafur; Faculty of Environmental Sciences, Agricultural University of Iceland; oa@lbhi.is.
Tipo: Peer-Reviewed Reports Palavras-chave: Birch woodlands; Drivers; Ecological restoration; Heathlands; Land degradation; Revegetation; Soil erosion; Wetlands.
Ano: 2013
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Economics of Integrated Watershed and Reservoir Management AgEcon
Lee, Yoon; Yoon, Taeyeon; Shah, Farhed A..
A dynamic optimization framework is used to analyze integrated watershed management and suggest appropriate policies. Soil conservation, reservoir level sediment release, downstream water allocation and water quality are subject to control. Application of the model to the Aswan Dam watershed illustrates the need for international cooperation to manage shared watersheds.
Tipo: Conference Paper or Presentation Palavras-chave: Watershed management; Soil erosion; Reservoir sedimentation; Environmental Economics and Policy; Resource /Energy Economics and Policy; Q25; Q53.
Ano: 2009 URL: http://purl.umn.edu/49478
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ENVIRONMENTAL AND ECONOMIC IMPACTS OF SOIL EROSION AND FERTILITY MINING IN NORTHERN TANZANIA AgEcon
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
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