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| Rawlins, Richard B.; Bernardo, Daniel J.. |
| A risk programming model was developed to evaluate the tradeoffs between risk and expected returns in beef-forage production systems. The specification represents nutrient and intake considerations when allocating forage among cattle enterprises; it also incorporates the various sources of risk facing livestock producers. Efficient ranch organizations were derived for a representative eastern Oklahoma ranch using MOTAD and Target-MOTAD formulations. Diversification of forage enterprises, introduction of cow-calf enterprises, and retained ownership of weaned calves were identified as important responses to reductions in acceptable levels of risk. Results also indicated efficient ranch plans to be sensitive to the risk criteria and producer's willingness... |
| Tipo: Journal Article |
Palavras-chave: Livestock Production/Industries; Risk and Uncertainty. |
| Ano: 1991 |
URL: http://purl.umn.edu/30308 |
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| Wu, JunJie; Mapp, Harry P., Jr.; Bernardo, Daniel J.. |
| A dynamic model is developed to analyze farmers' irrigation investment and crop choice decisions under alternative water quality protection policies. The model is applied to an empirical example in the Oklahoma High Plains. The choices of crops and irrigation systems and the resulting levels of irrigation, income, and nitrogen runoff and percolation are simulated over a ten-year period. An effluent tax on nitrogen runoff and percolation is shown to be effective in reducing nitrate pollution. The efficacy of cost sharing in adopting modern irrigation technologies and restrictions on irrigation water use depends on soil type. A tax on nitrogen use is shown to be the least effective policy. |
| Tipo: Journal Article |
Palavras-chave: Crop selection; Dynamic optimization; Irrigation investment; Water quality; Crop Production/Industries. |
| Ano: 1994 |
URL: http://purl.umn.edu/15167 |
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| Bernardo, Daniel J.. |
| The effect of irrigation system uniformity on the selection of risk-efficient irrigation strategies is evaluated using crop simulation and stochastic dominance procedures. Alternative strategies are evaluated under assumptions of both uniform and non-uniform application. Results indicate that the variability of net returns resulting from the employment of a specified schedule increases when irrigation uniformity is explicitly represented. Solutions derived using economic efficiency and stochastic dominance criteria indicate that the uniformity with which irrigations are applied contributes to the application of water-intensive irrigation schedules. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries. |
| Ano: 1988 |
URL: http://purl.umn.edu/29715 |
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| Bernardo, Daniel J.; Whittlesey, Norman K.; Saxton, Keith E.; Bassett, Day L.. |
| A two-stage simulation/mathematical programming model is presented for determining the optimal intraseasonal allocation of irrigation water under conditions of limited water supply. The model is applied to a series of water shortage scenarios under both surface and center pivot irrigation. Economically efficient irrigation management is shown to involve the coordination of a number of managerial decisions, including irrigation scheduling, crop substitution, the adoption of improved irrigation labor practices, and idling land. The results indicate that significant opportunities exist for conserving water in the study area under both surface and center pivot irrigation. |
| Tipo: Journal Article |
Palavras-chave: Crop Production/Industries; Resource /Energy Economics and Policy. |
| Ano: 1987 |
URL: http://purl.umn.edu/32222 |
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| Bernardo, Daniel J.. |
| A Markov chain dynamic programming model is presented for determining optimal range improvement strategies as well as accompanying livestock production practices. The model specification focuses on the improved representation of rangeland dynamics and livestock response under alternative range conditions. The model is applied to range management decision making in the Cross Timbers Region of central Oklahoma. Results indicate that tebuthiuron treatments are economically feasible over the range of treatment costs evaluated. Optimal utilization of forage production following a treatment requires the conjunctive employment of prescribed burning and variable stocking rates over the treatments life. |
| Tipo: Journal Article |
Palavras-chave: Land Economics/Use; Livestock Production/Industries. |
| Ano: 1989 |
URL: http://purl.umn.edu/32358 |
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