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MANAGEMENT STRATEGIES TO MITIGATE ENVIRONMENTAL IMPACT OF WEATHER UNCERTAINTY IN EFFLUENT APPLICATION TO IRRIGATED CORN IN SEMIARID REGIONS AgEcon
Kizer, Michael A.; Stoecker, Arthur L.; Carreira, Rita I.; Hattey, Jeffory A..
This study compares subsurface drip irrigation and sprinkler irrigation with respect to expected returns, aquifer life, nutrient utilization and accumulation in the production of irrigated corn using swine effluent and fresh groundwater from a depleting aquifer in the Oklahoma Panhandle. Most of the equations estimated econometrically had heteroskedasticity problems and MLE was used. The econometric estimation of a PDF of ammonia volatilization dependent on amount of nitrogen applied, for each irrigation system, was successful and is the basis for developing a stochastic chain for the soil nitrogen carryover equation. The results of the stochastic dynamic programming model are still being developed and will be presented at the conference.
Tipo: Conference Paper or Presentation Palavras-chave: Crop Production/Industries; Environmental Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/20110
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DYNAMIC COMPARISON OF SYSTEMS FOR IRRIGATION AND EFFLUENT APPLICATION AgEcon
Carreira, Rita I.; Stoecker, Arthur L.; Hattey, Jeffory A.; Kizer, Michael A..
This study compares subsurface drip irrigation and sprinkler irrigation with respect to expected returns, aquifer life, nutrient utilization and accumulation in the production of irrigated corn using swine effluent and fresh groundwater from a depleting aquifer in the Oklahoma Panhandle. The results of the Dynamic Programming model indicate that SDI outperforms center pivot sprinkler irrigation in terms of NPV of net returns and reduced phosphorus accumulation in soil. Soil nitrogen accumulation in soil is greater with SDI. Groundwater depletion is projected to occur at the end of 36th year with center pivot irrigation.
Tipo: Conference Paper or Presentation Palavras-chave: Resource /Energy Economics and Policy.
Ano: 2004 URL: http://purl.umn.edu/34794
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Subsurface Drip Irrigation Versus Center-Pivot Sprinkler for Applying Swine Effluent to Corn AgEcon
Carreira, Rita I.; Stoecker, Arthur L.; Epplin, Francis M.; Hattey, Jeffory A.; Kizer, Michael A..
A risk-averse irrigated corn producer would be better off choosing the more expensive subsurface drip irrigation (SDI) over center-pivot sprinkler (CPS), given limited aquifer life and swine effluent and urea fertilization. A stochastic optimization using EPIC data maximized expected utility of 100 years' worth of net revenues for a quarter section. Phosphorus accumulation was more likely with the CPS than with the SDI but soil nitrogen was constant under both systems. SDI conserves more water than CPS per acre but depletes the aquifer faster because a greater area is irrigated. These results were invariant in the sensitivity analysis.
Tipo: Journal Article Palavras-chave: Aquifer depletion; Center-pivot sprinkler irrigation; Certainty equivalent; Corn irrigation; Mathematical programming; Risk; Stochastic optimization; Subsurface drip irrigation; Crop Production/Industries; C61; C65; Q12; Q30; Q53.
Ano: 2006 URL: http://purl.umn.edu/43783
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