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| Registros recuperados: 16 | |
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| Babcock, Bruce A.; Chaherli, Nabil M.; Lakshminarayan, P.G.. |
| The conservation compliance provision of the 1985 Food Security Act requires highly erodible land to be cropped according to a locally approved conservation plan. There is overwhelming evidence that conservation compliance has reduced soil erosion. A key issue confronting Congress as they consider 1995 Farm Bill options is the fate of these erosion benefits if commodity programs are eliminated or it the subsidy level is greatly reduced. This study provides policymakers with additional insights into the relationship between conservation tillage practices and government programs by using observed farmer behavior. The central question addressed is: If future program benefits are not tied to conservation practices, will there be a significant decline in the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Land Economics/Use. |
| Ano: 1995 |
URL: http://purl.umn.edu/18561 |
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| Carriquiry, Alicia L.; Breidt, F. Jay; Lakshminarayan, P.G.. |
| Evaluating the environmental and economic impacts of agricultural policies is not a simple task. A systematic approach to policy analysis would include investigating the effect of factors such as tillage practices, crop rotations, type and amount of chemical used, weather, topography, and other soil attributes, on observables such as amount of soil eroded or chemical leached into the groundwater. For comparison purposes, the effects of those factors on the response variable would have to be assessed under alternative policy scenarios. Because the number of factor levels is alarmingly high in most problems, and because policies to be evaluated are often not in place at the time of the study, practitioners have resorted to simulation experiments to... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Computer experiment; Sampling; Policy analysis; Agricultural and Food Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/18350 |
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| Bouzaher, Aziz; Shogren, Jason F.; Holtkamp, Derald; Gassman, Philip W.; Archer, David W.; Lakshminarayan, P.G.; Carriquiry, Alicia L.; Reese, Randall; Furtan, William Hartley; Izaurralde, R. Cesar; Kiniry, James R.. |
| The interface between RS-CRAM and the environmental component of the integrated modeling system is described for crops, crop sequences, and management systems representative of western Canada. An experimentally designed set of EPIC simulations were performed to generate erosion output that was used to construct wind and water erosion metamodels (response functions). The results of the EPIC simulations indicate that wind and water erosion would be the dominant erosion problem over most of Saskatchewan and Manitoba. For Alberta, water erosion was predicted to be the dominant problem, except for the southern portion of the province. Erosion impacts were sensitive to tillage and cropping patterns. EPIC-predicted yields did not vary much across tillage, a... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agricultural and Food Policy; Environmental Economics and Policy. |
| Ano: 1995 |
URL: http://purl.umn.edu/18681 |
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| Carriquiry, Alicia L.; Breidt, F. Jay; Lakshminarayan, P.G.. |
| Evaluating the environmental and economic impacts of agricultural policies is not a simple task. A systematic approach to evaluation would include the effect of policy-dependent factors (sue as tillage practices, crop rotations, and chemical use) as well as the effect of policy-independent covariates (such as weather, topography, and soil attributes) on response variables (such as amount of soil eroded or chemical leached into the groundwater). For comparison purposes, the effects of these input combinations on the response variable would have to be assessed under competing policy scenarios. Because the number of input combinations is high in most problems, and because policies to be evaluated are often not in use at the time of the study, practitioners... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Research Methods/ Statistical Methods. |
| Ano: 1997 |
URL: http://purl.umn.edu/18460 |
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| Bouzaher, Aziz; Shogren, Jason F.; Holtkamp, Derald; Gassman, Philip W.; Archer, David W.; Lakshminarayan, P.G.; Carriquiry, Alicia L.; Reese, Randall; Kakani, Dharmaraju; Furtan, William Hartley; Izaurralde, R. Cesar; Kiniry, James R.. |
| This report describes an integrated agro-ecological modeling system that was developed to assess the potential economic and soil erosion impacts of different agricultural policies for the Canadian prairie provinces of Alberta, Saskatchewan, and Manitoba. The system was constructed by linking erosion metamodels (response functions), based on multiple simulations of the USDA Erosion Productivity Impact Calculator (EPIIC), with a modified version of Agriculture Canada's Canadian Regional Agriculture Model (CRAM) denoted as RS-CRAM (resource sensitive CRAM). A summary of both the environmental and agricultural decision (RS-CRAM) components are presented, including a description of the modifications and enhancements that were made to CRAM. Results of policy... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural and Food Policy; Environmental Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/18660 |
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| Babcock, Bruce A.; Lakshminarayan, P.G.; Wu, JunJie. |
| What to do with CRP contracts as they expire is one of the most pressing issues confronting U.S. agricultural policymakers in 1995. Because CRP renewal will compete in 19959 with other agricultural programs for funding, greater attention will be paid to improve targeting of payments to maintain a significant portion of existing environmental and farm benefits at a reduced program cost. We consider three alternative renewal criteria: (1) renewal of least expensive land first (cost-raking), (2) renewal of most environmentally sensitive land first (benefit-ranking), and (3) renewal of land according to the cost per unit of environmental benefit offered (cost/benefit-ranking). Environmental indicators used to measure benefits include sheet and rill erosion,... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Land Economics/Use. |
| Ano: 1995 |
URL: http://purl.umn.edu/18482 |
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| Bouzaher, Aziz; Shogren, Jason F.; Holtkamp, Derald; Gassman, Philip W.; Archer, David W.; Lakshminarayan, P.G.; Carriquiry, Alicia L.; Reese, Randall; Kakani, Dharmaraju; Furtan, William Hartley; Izaurralde, R. Cesar; Kiniry, James R.. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Agricultural and Food Policy; Environmental Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/18674 |
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| Registros recuperados: 16 | |
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