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| Registros recuperados: 17 | |
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| Diebel, Penelope L.; Taylor, Daniel B.; Batie, Sandra S.; Heatwole, Conrad D.. |
| The Chesapeake Bay is a major water resource whose quality has been threatened by soil erosion and agrichemical contamination. The control of agricultural pollution of the Bay is one of the focal points of the 1987 Chesapeake Bay agreement formed by four states in the Bay's watershed (Virginia, Maryland, Pennsylvania, and the District of Columbia). Among the suggested solutions is the promotion of low-input agricultural practices. However, some low-input practices also include frequent cultivations of the soil for non-chemical weed control practices, which may induce erosion. This analysis uses a case study approach to determine agricultural practice selection and potential erosion under different soil erosion constraints. A multi-period mathematical... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Land Economics/Use. |
| Ano: 1992 |
URL: http://purl.umn.edu/118171 |
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| Zhu, Minkang; Taylor, Daniel B.; Sarin, Subhash C.; Kramer, Randall A.. |
| The random nature of soil loss under alternative land-use practices should be an important consideration of soil conservation planning and analysis under risk. Chance constrained programming models can provide information on the trade-offs among pre-determined tolerance levels of soil loss, probability levels of satisfying the tolerance levels, and economic profits or losses resulting from soil conservation to soil conservation policy makers. When using chance constrained programming models, the distribution of factors being constrained must be evaluated. If random variables follow a log-normal distribution, the normality assumption, which is generally used in the chance constrained programming models, can bias the results. |
| Tipo: Journal Article |
Palavras-chave: Risk and Uncertainty. |
| Ano: 1994 |
URL: http://purl.umn.edu/31324 |
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| Chen, Wei; Kauffman, Dan; Taylor, Daniel B.; Peterson, Everett B.. |
| Every year, the federal government regulates how many pounds of summer flounder (while these fish are called summer flounder, they are caught throughout the year) can be caught along the eastern seaboard. Annually, the federal government sets the total allowable landings (TAL) based on biological considerations and the each state gets a percentage of the TAL as a quota. The percentage of TAL each state receives is based on historical landings. Each state can then allocate its quota among the months. The purpose of this paper is to establish an optimization model to maximize the annual revenue from catching summer flounder by allocating their annual quota among twelve months. The first stage of this research is to specify and estimate a model to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/6193 |
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| Segarra, Eduardo; Taylor, Daniel B.. |
| A conceptual optimal control theory model which considers farm level decision making with respect to soil management is developed. A simplified version of the theoretical model is applied to the Piedmont area of Virginia. The model includes the productivity impacts of both soil erosion and technological progress. Both the theoretical model and its empirical application are improvements over previous efforts. Results suggest that farmers in the study area can achieve substantial reductions in soil erosion by adopting alternative farming practices. |
| Tipo: Journal Article |
Palavras-chave: Farm Management. |
| Ano: 1987 |
URL: http://purl.umn.edu/30204 |
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| Kazmierczak, Tamra Kirkpatrick; Taylor, Daniel B.. |
| Poor management of the southeastern vegetable marketing cooperatives has been linked to poor record keeping practices. The VEGMARC II Record Keeping Program is part of a comprehensive multi-agency effort to provide solutions to the problems of southeastern vegetable marketing cooperatives. This computer program has been refined and expanded during four years of field testing. VEGMARC II features include pool price calculations, deduction of packing fees, calculation of grower net returns, and the printing of reports, checks, and mailing labels. Eighty percent of cooperatives responding to user surveys indicated the program was meeting the needs of their cooperative. |
| Tipo: Journal Article |
Palavras-chave: Agribusiness. |
| Ano: 1989 |
URL: http://purl.umn.edu/30190 |
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| Badirwang, Keeletlhoko Faith; Nakakeeto, Gertrude; Rudi, Jeta; Taylor, Daniel B.. |
| This study makes use of linear programming methodology to design a minimum cost diet for the Central Ugandan region. We used a set of constraints on recommended levels of daily nutrient intake, recommended proportions of groups of foods, as well as preferences and food availability in Central Uganda, to design a minimum cost healthy daily diet. Several models were considered, each forcing at least one of the following frequently consumed staple foods: matooke, cassava, and rice. We found that the minimum costs of the optimal diets were lowest in the planting season of March and highest in the harvesting season of December. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Central Uganda; Minimum cost diet; Malnutrition; Linear programming; Agricultural and Food Policy; Consumer/Household Economics; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Health Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/103603 |
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| Segarra, Eduardo; Kramer, Randall A.; Taylor, Daniel B.. |
| This paper analyzes the effects of uncertain soil loss in farm planning models. A disaggregated approach was used because of an interest in examining the impact of probabilistic soil loss constraints on farm level decision-making. A stochastic programming model was used to consider different levels of probability of soil loss. Traditional methods of analysis are shown to consistently overestimate net returns. |
| Tipo: Journal Article |
Palavras-chave: Farm Management. |
| Ano: 1985 |
URL: http://purl.umn.edu/29971 |
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| Taylor, Daniel B.; Young, Douglas L.. |
| The complementary interaction between topsoil depth and technical progress for winter wheat in the Palouse region was found to strengthen the long run payoff to conservation tillage. Nonetheless, conservation tillage was found to be competitive with conventional tillage only if its current yield disadvantages were eliminated. Conservation tillage was relatively more competitive on shallower topsoils and for longer planning horizons. Short-term subsidies coupled with research directed towards reducing the cost and yield disadvantages of conservation tillage in the Palouse were advocated to maintain long-term soil productivity. |
| Tipo: Journal Article |
Palavras-chave: Land Economics/Use; Research and Development/Tech Change/Emerging Technologies. |
| Ano: 1985 |
URL: http://purl.umn.edu/32515 |
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| Kasenge, Valentine; Taylor, Daniel B.; Bonabana-Wabbi, Jackline. |
| In Uganda overall crop loss due to pests exceeds that caused by drought, soil infertility, or poor planting material. Integrated Pest Management (IPM) technologies can reduce pest damage to crops by emphasizing non-chemical control methods thereby reducing potential negative effects of chemicals on the environment while preserving profitability. This study investigates the adoption of eight IPM practices including intercropping, crop rotation, two improved varieties, incorporating an 'exotic weed chaser', optimal planting dates, optimal planting density and fertilizer use. Variables include market forces, social factors, management factors, and technology delivery mechanisms. Results were consistent across the multivariate logit and ordered logit... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 2006 |
URL: http://purl.umn.edu/21040 |
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| Registros recuperados: 17 | |
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