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| Registros recuperados: 173 | |
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| MAQBOOL,M.M.; TANVEER,A.; ALI,A.; ABBAS,M.N.; IMRAN,M.; AHMAD,M.; ABID,A.A.. |
| A field experiment was conducted for two consecutive years to study the effect of fertilizer application methods and inter and intra-row weed-crop competition durations on density and biomass of different weeds and growth, grain yield and yield components of maize. The experimental treatments comprised of two fertilizer application methods (side placement and below seed placement) and inter and intra-row weed-crop competition durations each for 15, 30, 45, and 60 days after emergence, as well as through the crop growing period. Fertilizer application method didn't affect weed density, biomass, and grain yield of maize. Below seed fertilizer placement generally resulted in less mean weed dry weight and more crop leaf area index, growth rate, grain weight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Fertilizer; Grain yield; Maize; Plant growth. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000100047 |
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| Ouma, James Okuro; De Groote, Hugo; Owuor, George. |
| Maize is a key food crop in Kenya. While maize yields increased from 1.25 t ha-1 in early 1960s to over 2 tonnes in 1982, they fell below 1.5 t ha-1 in 2000. Given the limited land area, there is no doubt that Kenya will have to rely more on modern technologies for increased yields .Use of improved maize varieties and fertilizers will therefore continue to be critical inputs for improving productivity. To improve production, it is important to understand factors determining adoption and intensity of use of modern technologies. A stratified 2-stage sampling design was used to select 1800 households, subsequently interviewed by means of structured questionnaire. Econometric models were used to explore factors influencing adoption and intensity of use of the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Maize; Adoption; Improved seed; Fertilizer; Credit; Extension; Kenya; Crop Production/Industries. |
| Ano: 2006 |
URL: http://purl.umn.edu/25433 |
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| Adelaja, Adesoji O.; Sullivan, Kevin P.; Hailu, Yohannes G.; Govindasamy, Ramu. |
| Using an augmented profit function framework designed to account for externalities related to chemical use in agriculture, this paper explains the chemical use choices of farmers in an urban fringe farming environment. It further estimates empirical logit models of reduced insecticide, fungicide, herbicide, and fertilizer usage. Results suggest that farmers who perceive their regulatory environment to be strict, who have experienced right-to-farm conflicts, and who have farms larger in size are more likely to reduce their chemical use over time, vis-à-vis other farmers. The results also suggest the importance of other farm structural and business climate factors in determining chemical use reduction choices. |
| Tipo: Journal Article |
Palavras-chave: Chemical use; Sustainable agriculture; Herbicides; Fungicides; Fertilizer; Pesticides; Urban fringe; Agricultural and Food Policy; Agricultural Finance; Environmental Economics and Policy; Farm Management; Production Economics. |
| Ano: 2010 |
URL: http://purl.umn.edu/95646 |
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| Minde, Isaac J.; Mazvimavi, Kizito; Murendo, Conrad; Ndlovu, Patrick V.. |
| The fertilizer sector in Zimbabwe has evolved over the years in response to different policy changes based on the government’s priorities on agricultural development. The industry grew from the 1930s that targeted primarily large scale commercial farmers, through the liberalization period of the mid 1990s, and recent changes that have introduced controls on the marketing system. Since 2000, following the fast track land reform program, Zimbabwe has faced food insecurity challenges that have been exacerbated by the political and economic crises. This prompted the government to adopt policies that have reduced private sector interests in fertilizer supply. In this situation where explicit fertilizer markets have been absent, relief programs have been leading... |
| Tipo: Journal Article |
Palavras-chave: Fertilizer; Supply and demand; Policy reform; Consumption trends; Crop Production/Industries. |
| Ano: 2010 |
URL: http://purl.umn.edu/96179 |
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| Wanzala, Maria N.; Jayne, Thomas S.; Staatz, John M.; Mugera, Amin W.; Kirimi, Justus; Owuor, Joseph. |
| The paper has several specific objectives. First, it identifies how fertilizer marketing costs and the types of fertilizers used have changed over the course of the liberalization process in Kenya. A second objective is to examine the fertilizer subsector in Kenya with a view to identifying organizational and institutional changes that could improve its performance. Various types of fertilizer supply chains serving farmers in western Kenya are identified, examine the cost structure of these supply chains, identify potential sources of cost reduction in these supply chains, and last, estimate the impact of illustrative scenarios for reducing fertilizer marketing costs on the profitability of maize production in western Kenya. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Food Security; Food Policy; Kenya; Fertilizer; Crop Production/Industries; Q18. |
| Ano: 2001 |
URL: http://purl.umn.edu/55150 |
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| Pan, Lei; Christiaensen, Luc J.M.. |
| Through decentralized targeting of input vouchers new agricultural input subsidy programs aim to more effectively reach their objectives and target population. But, lingering fears of elite capture remain. These are borne out in the 2009 input voucher program in Kilimanjaro, Tanzania. Sixty percent of the voucher beneficiaries were households with village officials. This significantly reduced the targeting performance of the program, especially in unequal and remote communities. When targeting the poor, greater coverage and concentration in higher trust settings mitigated these concerns. Scrutiny remains important when relying on decentralized targeting, as is a clearer sense of purpose of input vouchers. |
| Tipo: Presentation |
Palavras-chave: Local elite; Decentralization; Targeting; Fertilizer; Voucher program; Tanzania; International Development; Public Economics; H11; H42; O22. |
| Ano: 2012 |
URL: http://purl.umn.edu/122905 |
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| Donovan, Cynthia; Damaseke, M.; Govereh, Jones; Simumba, D.. |
| Inorganic fertilizers will play a role in government programs, but whether or not a single policy is valuable for all farmers depends upon the net gain for the farmers. The research here seeks to demonstrate how to answer the question “Is fertilizer profitable in Zambia for maize and cotton in the smallholder sector?” This study identifies the key components determining profitability and then sets up a framework to evaluate the probability of farmers to obtain profitable results with fertilizer use on maize and cotton. Several cases are selected and the results are evaluated. Private profitability for the farmer at market prices is discussed, leaving social profitability to other researchers. A simple method for farmers and extensionists to use to... |
| Tipo: Report |
Palavras-chave: Food security; Food policy; Zambia; Maize; Cotton; Fertilizer; Agribusiness; Q18. |
| Ano: 2002 |
URL: http://purl.umn.edu/54606 |
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| Ribaudo, Marc; Delgado, Jorge; Hansen, LeRoy T.; Livingston, Michael J.; Mosheim, Roberto; Williamson, James M.. |
| Nitrogen is an important agricultural input that is critical for crop production. However, the introduction of large amounts of nitrogen into the environment has a number of undesirable impacts on water, terrestrial, and atmospheric resources. This report explores the use of nitrogen in U.S. agriculture and assesses changes in nutrient management by farmers that may improve nitrogen use effi ciency. It also reviews a number of policy approaches for improving nitrogen management and identifi es issues affecting their potential performance. Findings reveal that about two-thirds of U.S. cropland is not meeting three criteria for good nitrogen management. Several policy approaches, including fi nancial incentives, nitrogen management as a condition of farm... |
| Tipo: Report |
Palavras-chave: Reactive nitrogen; Nitrogen management; Fertilizer; Water quality; Greenhouse gas; Economic incentives; Conservation policy; Regulation; Environmental Economics and Policy; Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/118022 |
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| Xu, Z.; Guan, Zhengfei; Jayne, Thomas S.; Black, J. Roy. |
| Major Findings: The additional maize produced from a given amount of fertilizer applied varied widely across households even after largely controlling for soil and rainfall conditions. The median estimated response rate was 15.9kgs of maize per kg nitrogen applied; Under the range of conditions and smallholder management practices, average maize fertilizer response rates declined as the application rate increased beyond 2 bags of urea and 2 bags of D compound; Factors raising the response rate and profitability of fertilizer use included timely availability, application rates less than the MOA 4x4 recommendation, use of animal draft power in land preparation, and use of hybrid seed. In remote areas, and given current management practices, fertilizer use... |
| Tipo: Report |
Palavras-chave: Agriculture; Africa; Zambia; Fertilizer; Crop Production/Industries; Q12. |
| Ano: 2009 |
URL: http://purl.umn.edu/54639 |
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| Xu, Zhiying; Guan, Zhengfei; Jayne, Thomas S.; Black, J. Roy. |
| Fertilizer use remains very low in most of Africa despite widespread agreement that much higher use rates are required for sustained agricultural productivity growth. This study estimates maize yield response functions in agro-ecological Zone IIA, a relatively high potential zone of Zambia, to determine the profitability of fertilizer use under a range of small farm conditions found within this zone. The theoretical framework used in this study incorporates agronomic principles of the crop growth process. The model distinguishes different roles of inputs and non-input factors in crop production. We estimate the effects of conventional production inputs as well as household characteristics and government programs on maize yield for households in the... |
| Tipo: Report |
Palavras-chave: Zambia; Maize; Fertilizer; Profitability; Crop Production/Industries; Q12. |
| Ano: 2009 |
URL: http://purl.umn.edu/54500 |
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| Registros recuperados: 173 | |
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