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| Registros recuperados: 4.955 | |
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| Gowon, Dawuda T.; Andersen, Jay C.; Biswas, Basudeb. |
| An economic production function was derived in an analysis of water application to corn by phonological time periods. The quantities of use of water by growth periods as delineated by physical stages were tested for influence on final output of dry matter and grain. Several years data for three locations were utilized. The results tend to confirm the conceptual models and previous work in this type of analysis. Certain periods of growth were more critical than others. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1978 |
URL: http://purl.umn.edu/32553 |
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| Pardey, Philip G.; Alston, Julian M.; Chan-Kang, Connie; Magalhaes, Eduardo Castelo; Vosti, Stephen A.. |
| In general, reported rates of return to agricultural R&D are high, but questions have been raised about upward biases in the evidence. Among the reasons for this bias, insufficient attention to attribution aspects-matching of research benefits and costs-is a pervasive problem, the magnitude of which is illustrated here with new evidence for Brazil. Over the period 1981 to 2003, varietal improvements in upland rice, edible beans, and soybeans yielded benefits attributable to research of $14.8 billion in present value (1999 prices) terms; 6.1 percent of the corresponding value of crop output. If all of those benefits were attributed to Embrapa, a public research corporation accounting for more than half Brazil's agricultural R&D spending, the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Brazil; Agricultural R&D; Attribution; Soybeans; Rice; Beans; Benefit-cost ratios; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2002 |
URL: http://purl.umn.edu/14422 |
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| Richardson, James W.; Outlaw, Joe L.; Anderson, David P.; Sartwelle, James D., III; Schwart, Robert B., Jr.; Schumann, Keith D.; Feldman, Paul A.; Raulston, J. Marc; Klose, Steven L.. |
| The farm level economic impacts of the Farm Security and Rural Investment Act of 2002 on representative crop and livestock operations are projected in this report. The analysis was conducted over the 2001-2007 planning horizon using FLIPSIM, AFPC’s whole farm simulation model. Data to simulate farming operations in the nation’s major production regions came from two sources: - Producer panel cooperation to develop economic information to describe and simulate representative crop, livestock, and dairy farms. - Projected prices, policy variables, and input inflation rates from the Food and Agricultural Policy Research Institute (FAPRI) January 2003 Baseline. The FLIPSIM policy simulation model incorporates the historical risk faced by farmers for prices and... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agribusiness; Agricultural and Food Policy; Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/42699 |
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| Irwin, Scott H.; Martines-Filho, Joao Gomes; Good, Darrel L.. |
| The purpose of this paper is to evaluate the performance of market advisory services for the 1995-2000 corn and soybean crops. A new database from the Agricultural Market Advisory Services (AgMAS) Project is used in the evaluation. This database should not be subject to survivorship and hindsight biases. Overall, the results provide limited evidence that advisory programs as a group outperform market benchmarks, particularly after considering risk. In contrast, some evidence exists that advisory programs as a group outperform the farmer benchmark, even after taking risk into account. There is little evidence that advisory programs with superior performance can be usefully selected based on past performance. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/22256 |
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| Khakbazan, Mohammad; Hamilton, Cliff; Belcher, Kenneth W.. |
| The adoption and use of diversified cropping practices has become widely accepted by producers. However, the profitability of an enterprise is dependent on the biophysical and economic factors. The biophysical factors determine the enterprise relationship among the various crops, their interactions with the ecosystem, and how each of them fits into the overall management plan. The economic factors determine the relative advantage of each crop and service in the farm plan. Although there have been experimental studies in Canada examining the impacts of rotations on the agronomics of field crops, there is limited research in modeling economic and environmental dynamics of the potato production system. Potato production in Manitoba has rapidly increased in... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Crop Production/Industries. |
| Ano: 2006 |
URL: http://purl.umn.edu/34167 |
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| Cook, David C.; Liu, Shuang; Edwards, Jacky; Villalta, Oscar; Aurambout, Jean-Philippe; Kriticos, Darren J.; Drenth, Andre; De Barro, Paul J.. |
| Benefit cost analysis is a tried and tested analytical framework that can clearly communicate likely net changes in social welfare from investment decisions to diverse stakeholder audiences. However, in a plant biosecurity context, it is often difficult to predict policy benefits over time due to complex biophysical interaction between invasive species and their hosts. In this paper, we demonstrate how benefit cost analysis remains highly relevant to biosecurity decision-makers using the example of a plant pathogen targeted for eradication from banana growing regions of Australia, banana bunchy top virus. We develop a partial budgeting approach using a stratified diffusion spread model to simulate the likely benefits of eradication to the banana... |
| Tipo: Presentation |
Palavras-chave: Biosecurity; Benefit cost analysis; Invasive alien species; Crop Production/Industries. |
| Ano: 2012 |
URL: http://purl.umn.edu/124270 |
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| Smith, Elwin G.; Lerohl, Mel L.; Messele, Teklay; Janzen, H. Henry. |
| We develop a dynamic soil quality model to evaluate optimal cropping systems in the northern Great Plains. Modeling soil quality attributes is feasible, and attribute model results apply to a wide range of soils. A crop production system with continuous spring wheat and direct planting is the most profitable system. This system has low soil erosion and high quality attributes, indicating the benefits of increased soil quality exceed the higher maintenance costs. On-site value of additional soil organic carbon (OC) ranges from $1 to $4/ton OC/hectare/year. These values for soil OC impact the optimum tillage practice, but not the crop rotation. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 2000 |
URL: http://purl.umn.edu/30827 |
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| Registros recuperados: 4.955 | |
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