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Registros recuperados: 54 | |
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Somda, Zana C.; Allison, John R.; Ely, L.O.; Newton, G.L.; Wetzstein, Michael E.. |
The production of excess on-farm manure is placing continuous pressures on dairy producers to meet or exceed standards for environmental regulations while maintaining profitability and competitiveness. Evaluation of the effects of recycling nutrients on the profitability of the whole farm enterprise is important for a dairy operation. The objective of this study was to develop a linear programming model that evaluates the economic performance of a dairy operation considering production and environmental constraints. The main goal was to maximize profits from the dairy enterprise considering milk production, manure production, crop production while maintaining a balance of nutrients in the system. Results from simulation analyses showed greater effects... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental Economics and Policy. |
Ano: 2003 |
URL: http://purl.umn.edu/35167 |
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Zhang, Zibin; Jin, Xiangrong; Dong, Xuebing; Wetzstein, Michael E.. |
Since the beginning of this century, China’s annual GDP growth is over 9%. This growth is fueled by large increases in energy consumption, led by a coal-dominated energy structure, and associated with higher sulfur dioxide emissions and industry dust. In 2008, China accounted for over 17% of the world’s total primary energy consumption and accounts for nearly three-quarters of global energy growth. At an average annual energy growth rate over 12% since 2000, China’s future share of primary energy consumption will continue to increase. A consequence of this growth is China becoming the global leader in sulfur and carbon dioxide emissions. To deal with these energy and environmental challenges, the government set energy saving and pollution reduction... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Environmental productivity efficiency; Hyperbolic distance function; China's energy policy; Environmental Economics and Policy; Productivity Analysis; Resource /Energy Economics and Policy. |
Ano: 2010 |
URL: http://purl.umn.edu/60918 |
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Wetzstein, Michael E.; Musser, Wesley N.; McClendon, Ronald W.; Edwards, David M.. |
The importance of timeliness is investigated in the selection of machinery complements for double-crop wheat and soybean production in the southeastern coastal plain. An intertemporal stochastic simulation model was developed to generate probability distributions that were evaluated with stochastic dominance analysis. This research investigated the importance of intertemporal production linkages and adequate soil moisture on machinery selection. Failure to include these dimensions can result in erroneous machinery choices. |
Tipo: Journal Article |
Palavras-chave: Farm Management. |
Ano: 1990 |
URL: http://purl.umn.edu/29998 |
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Byrd, Mark M.; Fonsah, Esendugue Greg; Escalante, Cesar L.; Wetzstein, Michael E.. |
The elimination of methyl bromide (MeBr) has been a hot topic for policymakers for more than a decade. As a result, of the Montreal Protocol on Substances that Deplete the Ozone Layer, signatory nations began implementing guidelines aimed at reducing or eliminating a variety of toxic substances, including MeBr, which has been identified as one of the toxic contributors to ozone depletion. In 1997 the Ninth Meeting of the Parties in Montreal recommended an accelerated phase-out schedule for MeBr. The accelerated phase-out program is a major concern to most U.S. farmers, and in particular to farmers in Georgia, where the product is used not only as an important soil fumigant but also to control both the yellow and purple nutsedge (Cyperus sp.). Furthermore,... |
Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
Ano: 2006 |
URL: http://purl.umn.edu/8571 |
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Wetzstein, Michael E.; Musser, Wesley N.; Linder, David K.; Douce, G. Keith. |
Principal component analysis in employed to develop indices that distinguish between participants and nonparticipants in Integrated Pest Management (IPM) programs. Results of incorporating these indices into yield, net return, and production cost functions for cotton producers indicate that both yield and costs increase as the degree of producer participation in IPM increases. Although these results are inconsistent with previous research, they are consistent with the theoretical relationship between IPM and conventional input usage. |
Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
Ano: 1985 |
URL: http://purl.umn.edu/32308 |
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Vedenov, Dmitry V.; Duffield, James A.; Wetzstein, Michael E.. |
The hypothesis underlying this analysis is that in the presence of volatile gasoline prices competitive market forces will yield alternative, less volatile fuels as substitutes. A real-option pricing approach was employed for this analysis by modeling investment under uncertainty for the case of comparing stochastic prices of substitute commodities. Based on real options, threshold decision rules were developed for the adoption of portfolio fuels such as ethanol and conventional gasoline blends. Considering this portfolio effect, the benefit-to-cost ratios are above four for the alternative blends under varying discount rates and time horizons. This provides a strong indication that consumer demand exists for these portfolio fuels. Competitive markets will... |
Tipo: Conference Paper or Presentation |
Palavras-chave: Resource /Energy Economics and Policy. |
Ano: 2005 |
URL: http://purl.umn.edu/19182 |
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Registros recuperados: 54 | |
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