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Nitrogen Carry-over Impacts in Irrigated Cotton Production, Southern High Plains of Texas

Eduardo Segarra, Don E. Ethridge, Curtis R. Deussen and Arthur B. Onken
Western Journal of Agricultural Economics
Vol. 14, No. 2 (December 1989), pp. 300-309
Stable URL: http://www.jstor.org/stable/40988109
Page Count: 10
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Nitrogen Carry-over Impacts in Irrigated Cotton Production, Southern High Plains of Texas
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Abstract

A dynamic optimization model which introduces an intertemporal nitrate-nitrogen residual function is used to derive and evaluate nitrogen fertilizer optimal decision rules for irrigated cotton production in the Southern High Plains of Texas. Results indicate that optimal nitrogen applications critically depend on initial nitrate-nitrogen levels and nitrogen-to-cotton price ratios. Also, the results indicate that single-year optimization leads to suboptimal nitrogen applications, which helps explain long-term cotton yield declines in the Southern High Plains of Texas; but single-year optimization does not significantly impact the net present value of returns of irrigated cotton operations.

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