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| Registros recuperados: 11 | |
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| Talpaz, Hovav; Mjelde, James W.. |
| A method for optimizing the irrigation schedule is presented. When the response surface, generated by experimenting with the crop simulation models is concave (convex), an optimal solution can be found. The process is iteratively repeated till convergence is achieved. Corn irrigation scheduling is demonstrated, with soil moisture levels as control variables. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1988 |
URL: http://purl.umn.edu/32115 |
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| Amosson, Stephen H.; Dietrich, Raymond A.; Talpaz, Hovav; Hopkin, John A.. |
| This paper analyzes policy implications arising from the National Brucellosis Technical Commission Study. A systems simulation model was designed to estimate physical losses resulting from alternative bovine brucellosis programs. Changes in benefits, costs, level of infection and net benefits were calculated by program alternatives for determining economic and epidemiologic implications. Results indicate all alternative programs considered yield positive net benefits and reduce the prevalence of the disease. The results imply a need for further research to determine a program that is both epidemiologically and economically optimal. |
| Tipo: Journal Article |
Palavras-chave: Livestock Production/Industries. |
| Ano: 1981 |
URL: http://purl.umn.edu/32073 |
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| Talpaz, Hovav; Taylor, C. Robert. |
| This paper presents a theoretical framework for incorporating the following sources of risk into the determination of optimal fertilization rates: (a) the influence of weather and other stochastic factors on the marginal product of fertilizer, and (b) uncertainty about the coefficients of the response function. The decision criterion considered is the maximization of profit subject to a risk constraint on the probability of not recovering the cost of the fertilizer. The theoretical framework is applied to the fertilization of dryland grain sorghum in the Texas Blacklands. Results indicate that the risk averse producer should substantially lower his fertilization rate if soil moisture at fertilization time is low. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1977 |
URL: http://purl.umn.edu/32333 |
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| Taylor, C. Robert; Lacewell, Ronald D.; Talpaz, Hovav. |
| A framework for combining extraneous information with an econometric model to evaluate the economic impacts of pesticide withdrawals is presented in this paper. The extraneous information, which can be a best guess or experimental data, is used to shift an econometrically estimated supply function. The full sectoral econometric model is then simulated through time with and without the supply shift to estimate the relative impacts of withdrawing the pesticide. The theoretical framework is applied to the withdrawal of all insecticides used on cotton. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1979 |
URL: http://purl.umn.edu/32429 |
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| Shumway, C. Richard; Alexander, William P.; Talpaz, Hovav. |
| Some implications of theory are easily maintained in econometric estimation, but computational costs of maintaining curvature properties (sufficient for existence of an optimal solution) have often proved prohibitive. They also have been violated frequently by unrestricted econometric estimates. A computationally manageable procedure for maintaining and testing curvature is used here to obtain estimates of product supplies and input demands for Texas field crops consistent with the theory of the competitive industry. The curvature properties are tested along with several technology restrictions. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1990 |
URL: http://purl.umn.edu/32502 |
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| Registros recuperados: 11 | |
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