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| Registros recuperados: 45 | |
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| Masud, Sharif M.; Lacewell, Ronald D.; Stoll, John R.; Walker, J. Knox; Leser, James F.; Sellar, Christine. |
| This study evaluated implications of increased bollworm problems in a 20-county area of the Texas High Plains relative to cotton yields and economic impact. Results did not indicate a serious effect of bollworms upon lint yield when insecticides were used for control. However, estimated annual reduction in farmer profit due to the bollworm for 1979-81 was over $30 million. Yields were estimated to decline about 300,000 bales without insecticide use and about 30,000 bales with insecticide use. This decline suggests potentially serious implications for the comparative economic position of cotton in this region if insecticide resistance were to develop among insect pests. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1985 |
URL: http://purl.umn.edu/29975 |
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| Lee, John G.; Lacewell, Ronald D.; Richardson, James W.. |
| Predicted crop yields and wind erosion rates from a multi-year/multi-crop growth simulation model provided input into a multi-period recursive QP model to evaluate erosion implications during the transition to dryland crop production on the Texas Southern High Plains. Three farm-program participation options were considered in this study. Participation in an extension of the current farm program resulted in an increase in net returns and wind erosion rates above nonparticipation. Imposition of a soil loss limit without consideration of a flexible base option can significantly reduce discounted present values. Increasing risk aversion across producers affects crop mix selection which can result in lower per acre wind erosion rates for this particular... |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1991 |
URL: http://purl.umn.edu/30306 |
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| Cornforth, Gerald C.; Lacewell, Ronald D.. |
| This study estimates some of the economic impacts of a program that would allow farmers to save a part of their annual surface irrigation water allocation. The objective would be to save water in full allocation years to be used in water short years. The study area consisted of the El Paso County Water Improvement District. Results indicate that optimal temporal water use would increase district net farm revenue by three percent or less above actual water use. For the study area vegetables were the most profitable crop while laser leveling was not economically feasible. |
| Tipo: Journal Article |
Palavras-chave: Farm Management; Resource /Energy Economics and Policy. |
| Ano: 1982 |
URL: http://purl.umn.edu/32278 |
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| Leidner, Andrew J.; Lacewell, Ronald D.; Rister, M. Edward; Sturdivant, Allen W.. |
| The objective of this study is develop a theoretical model that can evaluate two types of public health expenditures on water-borne health risks: water-related municipal services, an ex ante preventative measure against water-borne contamination, and medical treatment, an ex post treatment of the water-borne pollutant’s harmful effects on human health. The modeled community can allocate resources in either centralized-municipal water-services, point-of-use water-services, or medical intervention, with expenditures subject to a budget constraint. The movement of a water-borne illness through the community is modeled with a susceptible-infected-susceptible (SIS) disease framework. An optimization framework is developed, including a statement of the... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Water; Public health; Rural development; Dynamic optimization; Community/Rural/Urban Development; Resource /Energy Economics and Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/98806 |
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| Laughlin, David H.; Lacewell, Ronald D.. |
| Control of salinity offers an opportunity to increase agricultural production along the Red River of Texas and Oklahoma. However, absolute benefits and the distribution of those benefits are sensitive to the crop yield effect of SAR (sodium absorption ratio). The effect of SAR on crop yield is not well defined. This study estimates agricultural benefits of a chloride control project as $65 million, not considering any SAR effect and $117 million with an SAR effect. Further, distribution of benefits was reversed between the eastern and western portions of the study area. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1981 |
URL: http://purl.umn.edu/32575 |
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| Griffin, Ronald C.; Lacewell, Ronald D.; Collins, Glenn S.. |
| A regional field crop and national livestock econometric model (TECHSIM) is used to examine the impacts of diverting plant oils (cottonseed oil and soybean oil) to use as a diesel fuel replacement. Two scenarios which represented a five and ten percent replacement of agriculture's diesel fuel use (1979) by plant oils are simulated for the period 1982-90. Results show that producers shift into cotton and soybean production and out of corn, small grains, and grain sorghum. Significant price shifts are observed for oilseeds and their meal and oil products. The annual net reduction in monetary measures of welfare is estimated at about $0.5 billion and over $1 billion for replacement of five and ten percent, respectively, of agriculture's diesel fuel use by... |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1985 |
URL: http://purl.umn.edu/32314 |
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| Lee, John G.; Lacewell, Ronald D.; Ozuna, Teofilo, Jr.; Jones, Lonnie L.. |
| Linear programming and regional input-output models were applied to estimate the impacts of increased pumping costs for irrigated agriculture due to groundwater depletion principally caused by the expanding urban area of San Antonio, Texas. A biophysical simulator was use to estimate linear programming coefficients of crop yield by irrigation level and timing. The results indicated significant local (county) economic impacts from groundwater mining but insignificant regional impacts. A major improvement on irrigation efficiency would be required to offset the increased pumping costs and reduce water availability associated with increased lifts due to urban expansion. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 1987 |
URL: http://purl.umn.edu/30203 |
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| Registros recuperados: 45 | |
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