Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 29
Primeira ... 12 ... Última
Imagem não selecionada

Imprime registro no formato completo
Agricultural Resources and Environmental Indicators, 2006 Edition AgEcon
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
Imagem não selecionada

Imprime registro no formato completo
Assessing nitrogen flow in production and utilization cycle of wheat and maize as a tool to monitor N loss in Iran - doi: 10.4025/actascibiolsci.v35i3.16039 Biological Sciences
Koocheki, Alireza; Ferdowsi University of Mashhad; Nassiri Mahallati, Mehdi; Ferdowsi University of Mashhad; Mansoori, Hamed; Ferdowsi University of Mashhad; Moradi, Rooholla; Ferdowsi University of Mashhad.
Increasing resource use efficiency is crucial for enhancement of agricultural productions and reducing environmental hazards. For this purpose, improvement of Nitrogen use efficiency is an effective approach. Not only N loss occurs in field but also in processing course of food utilization. The objective of this study was to evaluate N loss and efficiency from production to consumption for wheat and maize. For this purpose, data for the amount of applied nitrogen, acreage, yields, amount of returned residue were collected and a proportion of N allocated to different source of food or feed was also traced. Results showed that total N harvested by wheat and maize were 387 and 81.7 kt and N use efficiency for the same crops were 25 and 60%, respectively....
Palavras-chave: N use efficiency; N loss; Nutrient management; Fertilizer Environment.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/16039
Imagem não selecionada

Imprime registro no formato completo
Assessing the Distributional Impacts of Transferable Pollution Permits: The Case of Phosphorus Pollution Management at a River Basin Scale AgEcon
Kampas, Athanasios; Mamalis, Spyridon.
Although the initial allocation of pollution permits is neutral in terms of efficiency, it does have a significant impact on distributive equity. In this paper, we examine the two main categories of permit allocation rules, the distributive and the reductive, for controlling phosphorus pollution in a small catchment in South West England. Based on the premise that the regulatory choice compromises efficiency and equity, the main result of this paper is that an allocation of permits in proportion to the intensity of environmental preferences is a “win-win” choice. The reason is that it simultaneously achieves two goals. First, it is efficient (or cost-effective) since a permit system achieves a prespecified target at a minimum abatement cost, while second,...
Tipo: Journal Article Palavras-chave: Pollution permits; Phosphorus; Nutrient management; Export coefficient model; Water quality; Distributive justice; Income inequality; Atkinson Index; Environmental Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/44115
Imagem não selecionada

Imprime registro no formato completo
Chemical properties of volcanic soil affected by seven-year rotations Chilean J. Agric. Res.
Hirzel,Juan; Undurraga,Pablo; González,Jorge.
Long-term crop rotation systems can benefit soil chemical-physical properties and crop productivity. The lack of information on the effect of long-term crop rotations on soil chemical-physical properties for volcanic soils in Chile could restrict reaping real benefits, and make it difficult to take agricultural management decisions, which could lead to possible negative consequences on some soil chemical-physical properties and the environment. The development of information associated with the effect on soil chemical-physical properties with respect to long-term rotation systems and their fertilization management contribute to improving agronomic management decisions for these soils. A study was carried out to assess the effect of six rotation systems...
Tipo: Journal article Palavras-chave: Crop rotation; Andisol; Nutrient management; Soil fertility.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200016
Imagem não selecionada

Imprime registro no formato completo
Cost-Effectiveness of Nutrient Management and Buffers: Comparisons of Two Spatial Scenarios AgEcon
Bonham, John G.; Bosch, Darrell J.; Pease, James W..
Farmers and taxpayers would benefit from more cost-effective agricultural nutrient pollution control measures. The objectives of our study are (1) to assess compliance costs and reductions in phosphorus loadings from implementation of nutrient management and riparian buffers; and (2) to estimate how the spatial scenario, which is the method of representing farms within the watershed, affects estimated compliance costs and reductions in phosphorus deliveries. Estimated compliance costs are quite sensitive to the spatial scenario. Buffers are more cost-effective than nutrient management under one of the two spatial scenarios, whereas nutrient management is more cost-effective under the other scenario. Shifts to more erosive crops reduce the effectiveness...
Tipo: Journal Article Palavras-chave: Compliance costs; Geographic information systems (GIS); Mathematical programming; Nutrient management; Phosphorus (P); Pollution abatement; Riparian buffers; Spatial analysis; Environmental Economics and Policy; Land Economics/Use; Q12; Q52.
Ano: 2006 URL: http://purl.umn.edu/43746
Imagem não selecionada

Imprime registro no formato completo
Economic Impacts of EPA's Manure Application Regulations on Dairy Farms with Lagoon Liquid Systems in the Southwest Region AgEcon
Huang, Wen-Yuan; Magleby, Richard S.; Christensen, Lee A..
EPA's new restrictions on land application of manure nutrients by concentrated animal feeding operations (CAFOs) could decrease the net return of 6-17% of the medium and large dairy farms with lagoon systems in the southwestern United States. Many of the other dairy CAFOs in the region could achieve higher net income under the restrictions if they reduce feed costs by better utilizing manure and expanding homegrown feed production.
Tipo: Journal Article Palavras-chave: CAFO; Dairy farms; Land application; Manure regulations; Nutrient management; Environmental Economics and Policy; Livestock Production/Industries; C61; Q12; Q52; Q58.
Ano: 2005 URL: http://purl.umn.edu/43993
Imagem não selecionada

Imprime registro no formato completo
ECONOMIC RETURNS FROM REDUCING POULTRY LITTER PHOSPHORUS WITH MICROBIAL PHYTASE AgEcon
Bosch, Darrell J.; Zhu, Minkang; Kornegay, Ervin T..
Requiring that crop applications of manure be based on phosphorus content (P-standard) could increase poultry litter disposal costs. Microbial phytase reduces litter P content and could reduce litter disposal costs under a P-standard. For a representative Virginia turkey farm, phytase costs $2,500 and could increase value of litter used for fertilizer on the turkey farm by $390 and reduce supplemental P feed costs by $1,431. Based on assumed litter demand and supply, estimated litter export prices with phytase could exceed export prices without phytase by $3.81 per ton. Phytase net returns to the farm are an estimated $ 1,435.
Tipo: Journal Article Palavras-chave: Economic returns; Microbial phytase; Nutrient management; Phosphorus; Poultry litter; Water quality; Livestock Production/Industries.
Ano: 1997 URL: http://purl.umn.edu/15056
Imagem não selecionada

Imprime registro no formato completo
Effects of Manure Use and Use Restrictions on Variable Production Costs and Net Incomes for U.S. Corn Producers AgEcon
Beckman, Jayson F.; Livingston, Michael J..
We utilize a treatment effects model to examine if there are differences in costs/profits for manure-using corn producers versus non-users. We find that manure users have lower peracre operating costs via reductions in fertilizer and soil conditioner costs; however, the use of manure reduces grain yields and ultimately leads to no difference in profit. Separate results indicate that manure-use restrictions do not affect costs or profits; thus policies could be in place to regulate manure usage without impacting the costs/profit structure of the farm.
Tipo: Article Palavras-chave: Nutrient management; Treatment effects; Micro-data; Environmental Economics and Policy; Farm Management; Q1.
Ano: 2012 URL: http://purl.umn.edu/120450
Imagem não selecionada

Imprime registro no formato completo
ENVIRONMENTAL COMPLIANCE IN U.S. AGRICULTURAL POLICY: PAST PERFORMANCE AND FUTURE POTENTIAL AgEcon
Claassen, Roger; Breneman, Vincent E.; Bucholtz, Shawn; Cattaneo, Andrea; Johansson, Robert C.; Morehart, Mitchell J..
Since 1985, U.S. agricultural producers have been required to practice soil conservation on highly erodible cropland and conserve wetlands as a condition of farm program eligibility. This report discusses the general characteristics of compliance incentives, evaluates their effectiveness in reducing erosion in the program's current form, and explores the potential for expanding the compliance approach to address nutrient runoff from crop production. While soil erosion has, in fact, been reduced on land subject to Conservation Compliance, erosion is also down on land not subject to Conservation Compliance, indicating the influence of other factors. Analysis to isolate the influence of Conservation Compliance incentives from other factors suggests that about...
Tipo: Report Palavras-chave: Conservation compliance; Sodbuster; Swampbuster; Conservation policy; Agri-environmental policy; Nutrient management; Buffer practices; Agricultural and Food Policy.
Ano: 2004 URL: http://purl.umn.edu/34033
Imagem não selecionada

Imprime registro no formato completo
From Reasrch Station to Farmer 's Field : Nutrient Management Research for Millet -Based Cropping Systems of western Rajasthan; Open Agri
B..
Palavras-chave: Land resources; State; Millets; Nutrient management; Sole cropping; Farmyard manure; Fallow systems; Arid zones; Yields.
Ano: 1997 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4663
Imagem não selecionada

Imprime registro no formato completo
Impact Assessment of Crop and Resource Management Technology: A Case of Groundnut Production Technology Open Agri
P.K..
Palavras-chave: Technology transfer; Groundnuts; Inorganic acid salts; Nutrient management; Technology; Sprinklers; Gypsum; On-farm research; Pigeonpeas; Zinc.
Ano: 1998 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4664
Imagem não selecionada

Imprime registro no formato completo
IMPACTS OF WITHIN-FARM SOIL VARIABILITY ON NITROGEN POLLUTION CONTROL COSTS AgEcon
Vandyke, Laura S.; Bosch, Darrell J.; Pease, James W..
The effects of considering variable within-farm soil runoff and leaching potential on costs of reducing nitrogen losses are analyzed for a Virginia dairy. Manure applications may cause nitrogen losses through runoff and leaching because of factors such as uncertain nitrogen mineralization. Farmers can reduce nitrogen control costs by applying manure on soils with less nitrogen loss potential. Ignoring within-farm soil variability may result in overstating the farm's costs of reducing nitrogen losses.
Tipo: Journal Article Palavras-chave: Economic costs; Linear programming; Manure; Nitrogen; Nutrient management; Simulation; Soil variability; Environmental Economics and Policy.
Ano: 1999 URL: http://purl.umn.edu/15139
Imagem não selecionada

Imprime registro no formato completo
Improving the productivity of rice-wheat system through field specific nutrient management in Nepal International Rice Research Institute
Regmi, Anant Prasad.
xix, 129 l. Thesis (Ph.D.) -- University of the Philippines at Los Baños
Tipo: Thesis Palavras-chave: Rice; Soil; Fertilizers; Nutrient management; Wheat; Crop rotation; Cropping systems; Grain yield; Nepal.
Ano: 2003 URL: http://hdl.handle.net/123456789/401
Imagem não selecionada

Imprime registro no formato completo
Increasing productivity of intensive rice systems through site-specific nutrient management International Rice Research Institute
Dobermann, A.; Witt, C.; Dawe, D.; International Rice Research Institute.
x, 410 p. : ill.
Tipo: Book Palavras-chave: Nutrient management; Fertilizers; Productivity.
Ano: 2004 URL: http://hdl.handle.net/123456789/317
Imagem não selecionada

Imprime registro no formato completo
Multiple Environmental Externalities and Manure Management Policy AgEcon
Key, Nigel D.; Kaplan, Jonathan D..
This paper considers the economic and environmental implications of regulating water and air nitrogen emissions under single and multi-environmental media policies in the U.S. hog industry. We examine tradeoffs from policies designed to correct an externality in one medium, when there are multiple environmental externalities. We separately and jointly analyze: (a) nitrogen land application restrictions consistent with recently adopted EPA requirements under the Clean Water Act, and (b) hypothetical air quality restrictions under the Clean Air Act, both with and without EQIP payments available to mitigate the costs of complying with nutrient application regulations.
Tipo: Journal Article Palavras-chave: Ammonia emission; Livestock waste; Mathematical programming; Multiple externalities; Nutrient management; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2007 URL: http://purl.umn.edu/8601
Imagem não selecionada

Imprime registro no formato completo
NY Pollution Discharge Elimination Permits for CAFOs, Management Adjustments and the Environment AgEcon
Enahoro, Dolapo K.; Schmit, Todd M.; Boisvert, Richard N..
Weakening demand for livestock and dairy produce, historically high prices for feed ingredients and increasingly strict regulations on animal waste management continue to put significant pressure on livestock and dairy operating margins. In this paper, we use representative farm mathematical programming models to analyze important linkages between farm management adjustments and changes in farm income due to recent changes in relevant agricultural prices and restrictions on land application of nutrients. We account explicitly for new restrictions on land application of nitrogen and phosphorus, and specifically applied to confined animal feeding operations (CAFOs). Our mathematical methods and the distinctive data available allows for the assessment of...
Tipo: Conference Paper or Presentation Palavras-chave: CAFO regulations; Nutrient management; Manure disposal; Mathematical programming; Environmental quality; Environmental Economics and Policy; Farm Management; Production Economics.
Ano: 2010 URL: http://purl.umn.edu/61143
Imagem não selecionada

Imprime registro no formato completo
Off-Farm Employment Effects on Adoption of Nutrient Management Practices AgEcon
Gedikoglu, Haluk; McCann, Laura M.J.; Artz, Georgeanne M..
Off-farm income as a share of total farm household income has been increasing. Previous studies found inconsistent results regarding the impact of off-farm income on adoption of conservation practices. We test the hypothesis that off-farm employment has a positive impact on adoption of capital incentive practices and a negative impact on adoption of labor-intensive practices. The results confirm that adoption of injecting manure into the soil, a capital intensive practice, is positively and significantly impacted by off-farm employment of the operator. However, off-farm employment variables had no effect on adoption of record keeping.
Tipo: Journal Article Palavras-chave: Adoption; Nutrient management; Off-farm income; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2011 URL: http://purl.umn.edu/117778
Imagem não selecionada

Imprime registro no formato completo
Preliminary Assessment of Nitrous Oxide Offsets in a Cap and Trade Program AgEcon
Ribaudo, Marc; Delgado, Jorge; Livingston, Michael J..
Nitrous oxide is a powerful greenhouse gas that is emitted from cropland treated with nitrogen fertilizer. Reducing such emissions through nutrient management might be able to produce offsets for sale in a cap and trade program aimed at reducing greenhouse gases. We use the Nitrate Leaching and Economic Analysis Program (NLEAP) model and data from the Agricultural and Resource Management Survey to examine what changes in rate, timing, or method of application a farmer would take to produce offsets. We find that reducing the application rate is the most favored approach for producing offsets. We also find that some management choices may increase nitrate losses to water.
Tipo: Journal Article Palavras-chave: Nitrous oxide; Nutrient management; Cap and trade; NLEAP; Greenhouse gas; Environmental Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/117776
Imagem não selecionada

Imprime registro no formato completo
Produção de milho e sorgo em várzea. Infoteca-e
PARFITT, J. M. B..
ECOFISIOLOGIA E FENOLOGIA DAS CULTURAS DO MILHO E DO SORGO (Paulo Regis Ferreira da Silva; Gilber Argenta pag 7-18); NUTRIÇÃO, CORREÇÃO DO SOLO E ADUBAÇÃO (Walkyria Bueno Scivittaro pag 19-26); SISTEMAS DE CULTIVO DE MILHO EM VÁRZEA - PLANTIO DIRETO (Francisco de Jesus Vernetti Junior; Algenor da Silva Gomes pag 27-38); IMPLANTAÇÃO DA LAVOURA DE MILHO (Marilda Pereira Porto; Claudio Alberto Sousa da Silva; José Maria Barbat Parfitt; Silvio Steinmetz pag 39-43); CULTIVARES DE MILHO (Marilda Pereira Porto pag 45-55); MANEJO DA CULTURA DO SORGO (Antonio André Amaral Raupp pag 57-59); DRENAGEM E IRRIGAÇÃO PARA MILHO E SORGO CULTIVADOS EM ROTAÇÃO COM ARROZ IRRIGADO (Claudio Alberto Souza da Silva; José Maria Barbat Partitt pag 61-72); ADEQUAÇÃO DA ÁREA PARA A...
Tipo: Documentos (INFOTECA-E) Palavras-chave: Terras baixas; Producao; Milho; Sorgo; Fisiologia Vegetal; Fenologia; Nutrição; Solo; Adubação; Sistema de Cultivo; Doença de Planta; Drenagem; Irrigação; Semeadura; Erva daninha; Praga de planta; Secagem; Armazenamento; Varzea; Corn; Sorghum (Poaceae); Plant physiology; Phenology; Nutrient management; Cropping systems; Plant diseases and disorders; Drainage; Irrigation; Sowing; Weeds; Drying; Storage; Lowlands.
Ano: 2000 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/743586
Imagem não selecionada

Imprime registro no formato completo
Sny Magill Watershed Modeling Project: Final Report AgEcon
Saleh, Ali; Gassman, Philip W.; Kling, Catherine L..
Replaced with revised version of paper 10/29/08.
Tipo: Working or Discussion Paper Palavras-chave: BMP; Land use; Modeling; Nutrient management; Water quality; Watershed; Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/18666
Registros recuperados: 29
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