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| Registros recuperados: 173 | |
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| Byerlee, Derek R.; Spielman, David J.; Alemu, Dawit; Gautam, Madhur. |
| Despite more than a decade of policies placing high priority on cereal intensification, backed by one of the highest rates of public expenditures on agricultural in Africa, Ethiopia has yet to see payoffs in terms of higher and more stable cereal yields, reduced dependency on food aid, improved food security, and lower consumer prices for staples. There is understandable concern about the performance, efficiency and sustainability of the agricultural sector, specifically in terms of the current systems for providing extension services, improved seed, fertilizer, and credit. This paper aims to illuminate possible solutions available to improving the prospects for cereal intensification in Ethiopia. The paper traces the largely state-led policies that have... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agricultural development; Agricultural extension; Fertilizer; Seed markets; Ethiopia; Crop Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/42406 |
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| Elobeid, Amani E.; Carriquiry, Miguel A.; Fabiosa, Jacinto F.; Mulik, Kranti; Hayes, Dermot J.; Babcock, Bruce A.; Dumortier, Jerome; Rosas, Francisco. |
| This analysis uses the 2011 FAPRI-CARD (Food and Agricultural Policy Research Institute–Center for Agricultural and Rural Development) baseline to evaluate the impact of four alternative scenarios on U.S. and world agricultural markets, as well as on world fertilizer use and world agricultural greenhouse gas emissions. A key assumption in the 2011 baseline is that ethanol support policies disappear in 2012. The baseline also assumes that existing biofuel mandates remain in place and are binding. Two of the scenarios are adverse supply shocks, the first being a 10% increase in the price of nitrogen fertilizer in the United States, and the second, a reversion of cropland into forestland. The third scenario examines how lower energy prices would impact world... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Afforestation; Energy price; Ethanol tax credit; Fertilizer; Partial equilibrium model; Policy analysis; Agricultural and Food Policy; Demand and Price Analysis; Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/107043 |
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| Minde, Isaac J.; Jayne, Thomas S.; Crawford, Eric W.; Ariga, Joshua; Govereh, Jones. |
| This study was funded jointly by the Regional Strategic Agricultural Knowledge Support System (Re-SAKSS) for Southern Africa, based at International Water Management Institute, Pretoria, South Africa, and by the United States Agency for International Development's Africa Bureau. Much of the data and analysis reported in this study was carried out under the Tegemeo Agricultural Monitoring and Policy Analysis Project, funded by USAID/Kenya; the Food Security Research Project/Markets, Trade and Enabling Environment (MATEP) Program, funded by USAID/Zambia and the Swedish International Development Agency; and by the DFID and USAID offices in Lilongwe, Malawi. |
| Tipo: Report |
Palavras-chave: Fertilizer; Africa; Malawi; Zambia; Kenya; Crop Production/Industries; Q18. |
| Ano: 2008 |
URL: http://purl.umn.edu/54934 |
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| Mitchell, Paul D.. |
| This paper explores the effect farmer perceptions concerning how best management practice (BMP) adoption changes the profit distribution have on BMP adoption incentives and the potential for insurance to increase these incentives. Adoption indifference curves illustrate the effect of farmer perceptions on BMP adoption incentives and the potential for insurance to expand the set of perceptions consistent with adoption. Empirical analysis quantifies these conceptual results for nutrient BMP insurance, a new policy available to corn farmers as part of a USDA-Risk Management Agency pilot program in four states. Results indicate that nutrient BMP insurance can have economically relevant effects on farmer adoption incentives. |
| Tipo: Journal Article |
Palavras-chave: Adoption indifference curves; Crop insurance; Fertilizer; Green insurance; D8; Q12; Q16; Q21. |
| Ano: 2004 |
URL: http://purl.umn.edu/43460 |
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| Ariga, Joshua; Jayne, Thomas S.; Kibaara, Betty; Nyoro, James K.. |
| This study uses nationwide household panel survey data from 1996/97 to 2006/07 to examine trends in fertilizer use on maize by smallholder maize growers. The paper also compares these findings with fertilizer use rates according to other recent surveys in Kenya to assess comparability. We also examine the correlation between household fertilizer use and indicators of welfare such as wealth and landholding size. In addition, we use econometric techniques applied to household survey data to identify the main household and community characteristics associated with fertilizer purchases. Lastly, the study considers alternative policy strategies for maintaining smallholders’ access to fertilizer in the current context of substantially higher world fertilizer... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Fertilizer; Africa; Malawi; Kenya; Small Holders; Crop Production/Industries; Q13. |
| Ano: 2008 |
URL: http://purl.umn.edu/55169 |
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| Desai, Gunvant M.. |
| The International Food Policy Research Institute, as part of the Conservative Group on International Agricultural Research, is profoundly concern about the new agricultural technology and the policies needed to encourage its adoption and increase its effectiveness in meeting major societal objectives. The spread of high-yielding varieties depends greatly on increased in fertilizer availability to farmers. Likewise, continued rapid growth in fertilizer uses depends on new crops varieties that can provide greater yields in response to larger doses of fertilizer. It is clear that during the next few decades the food supplies necessary to meet even minimum expected rates of population growth and growth in per capita income cannot be realized without the... |
| Tipo: Report |
Palavras-chave: Fertilizer; India; Fertilizer industry; Crop Production/Industries. |
| Ano: 1982 |
URL: http://purl.umn.edu/42215 |
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| Rosas, Francisco. |
| We introduce a world fertilizers model that is capable of producing fertilizer demand projections by crop, by country, by macronutrients, and by year. For each crop, the most relevant countries in terms of production, consumption, or trade are explicitly modeled. The remaining countries are modeled, for each crop, within a regional aggregate. The nutrient coverage includes nitrogen (N), phosphorous (P), and potassium (K). In this report we present the data and procedures used to set up the model as well as the assumptions made. The fertilizer model interacts with the yield equations of the FAPRI-ISU model (Food and Agricultural Policy Research Institute at Iowa State University), and by means of a set of production elasticities, projects each nutrient’s... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agriculture; Fertilizer; Nitrogen; Phosphorous; Policy analysis; Potassium; Projections; Crop Production/Industries; Demand and Price Analysis; Production Economics. |
| Ano: 2011 |
URL: http://purl.umn.edu/103223 |
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| Xu, Zhiying; Govereh, Jones; Black, J. Roy; Jayne, Thomas S.. |
| Multi-year nationwide survey data is used to estimate maize yield response functions and determine profitability of fertilizer use by small-scale farmers in Zambia. There has been a dearth of empirical studies on economics of fertilization in the context of Sub-Saharan Africa. In this paper we identify major methodological issues arising from using survey data and estimate maize yield response functions for small-scale rural households that have various management practices and soil conditions in two major agro-climatic zones. Profitability of fertilizer use is determined for each group of households. Our findings provide the following key messages. First, households that obtained fertilizer on time and used animal draught power or mechanical power for... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Maize; Yield; Fertilizer; Profitability; Survey data; Crop Production/Industries. |
| Ano: 2006 |
URL: http://purl.umn.edu/25730 |
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| Chung, S.W.; Gassman, Philip W.; Huggins, David R.; Randall, G.W.. |
| The Erosion Productivity Impact Calculator (EPIC) model was tested using four years of field data collected at a site near Lamberton, Minnesota, under three different crop rotations: continuous corn (Zea mays L.) or CC, soybean (Glycine max L.)-corn (SC), continuous alfalfa (Medicago sativa L.) or CA. The model was evaluated by comparing measured versus predicted subsurface drainage flow (tile flow), nitrate-nitrogen (NO3-N) loss in tile flow, residual NO3-N in the soil profile, crop N uptake, and yield. Initially, EPIC was run using standard Soil Conservation Service (SCS) runoff curve numbers (CN2) suggested for the soil type at the site. Two different SC runs were performed with a nitrogen fixation parameter denoted as parm(7) set at either 1.0 or 0.3,... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Modeling; Water quality; Crop rotation; Tile drainage; Nitrate leaching; Fertilizer; Crop Production/Industries. |
| Ano: 2000 |
URL: http://purl.umn.edu/18479 |
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| Carew, Richard; Smith, Elwin G.; Grant, Cynthia. |
| Production functions to explain regional wheat yields have not been studied extensively in the Canadian prairies. The objective of this study is to employ a Just-Pope production function to examine the relationship between fertilizer inputs, soil quality, biodiversity indicators, cultivars qualifying for Plant Breeders’ Rights (PBR), and climatic conditions on the mean and variance of spring wheat yields. Using regional-level wheat data from Manitoba, Canada, model results show nitrogen fertilizer, temporal diversity, and PBR wheat cultivars are associated with increased yield variance. Mean wheat yield is reduced by the proportion of land in wheat, the interaction of growing temperature and precipitation, and spatial diversity. By contrast, higher soil... |
| Tipo: Journal Article |
Palavras-chave: Climate; Fertilizer; Manitoba; Plant Breeders’ Rights; Production risk; Wheat; Yield; Agribusiness; Crop Production/Industries; Farm Management; Land Economics/Use; Productivity Analysis; Risk and Uncertainty; O18; Q16. |
| Ano: 2009 |
URL: http://purl.umn.edu/56649 |
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| Rogeri,Douglas Antonio; Ernani,Paulo Roberto; Mantovani,Analú; Lourenço,Kesia Silva. |
| ABSTRACT Determining the chemical composition of poultry litter is important in order to apply this waste as soil fertilizer without causing negative environmental impacts. The aim of this study was to evaluate the average and variability of some chemical parameters of 165 samples of poultry litter produced from confined animal production facilities located in the states of Santa Catarina and Rio Grande do Sul, Southern of Brazil. Samples of approximately 5.0 L were collected on 20 points from the truck at the time the material was unloaded into the application sites. Subsequently, they were oven-dried at 65 °C and analyzed. Values of pH in water, dry matter, N, P and K were determined in all samples; N soluble in water (soluble-N), ammonium (NH+4-N) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal waste; Fertilizer; Organic nitrogen. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100525 |
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| Sartor,Laércio Ricardo; Assmann,Alceu Luiz; Assmann,Tangriani Simioni; Bigolin,Paulo Egidio; Miyazawa,Mário; Carvalho,Paulo Cesar de Faccio. |
| Swine residue (SR) applied as nutrient source of crops such as corn, bean, soybean and wheat, besides representing an environmental-friendly way of disposing of organic waste resulting from swine production, may significantly increase grain yields, replacing mineral fertilizer. The objective was to evaluate the effect of SR rates on corn, common bean, soybean and wheat yields from 2002 to 2007, in comparison with mineral fertilizer. The experiment was carried out at the Instituto Agronômico do Paraná - IAPAR, Pato Branco, PR and consisted of increasing SR rates (0, 15, 30, 45, and 60 m³ ha-1) and one treatment with mineral fertilizer (NPK 4-30-10), using 250 kg ha-1 for bean and 300 kg ha-1 for corn, soybean and wheat. Also, in the treatment with mineral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fertilizer; Micronutrient; Foliar nitrogen; Organic residues; Foliar phosphorous. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200035 |
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| Registros recuperados: 173 | |
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