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Moving from Uniform to Variable Fertilizer Rates on Iowa Corn: Effects on Rates and Returns

There is a growing need for research that estimates the potential value to farmers of acquiring and using improved information about spatial variability within their fields. This paper considers the potential value of switching from single rate technologies (SRT) to variable rate technologies (VRT) for applying nitrogen fertilizer in 12 Iowa counties. Changes in yields, nitrogen use, and profits are estimated for individual field and entire counties. The economic and environmental impacts of moving from SRT to VRT depend heavily on the amount of inherent yield variability in field.

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Paper provided by Center for Agricultural and Rural Development (CARD) at Iowa State University in its series Center for Agricultural and Rural Development (CARD) Publications with number 97-wp182.

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Date of creation: Oct 1997
Date of revision:
Handle: RePEc:ias:cpaper:97-wp182
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  1. Lence, Sergio H. & Hayes, Dermot J., 1995. "Land Allocation In The Presence Of Estimation Risk," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 20(01), July.
  2. Hennessy, David A. & Babcock, Bruce A., 1998. "Information, Flexibility, and Value Added," Staff General Research Papers 1362, Iowa State University, Department of Economics.
  3. Babcock, Bruce A., 1992. "Effects of Uncertainty on Optimal Nitrogen Applications (The)," Staff General Research Papers 10588, Iowa State University, Department of Economics.
  4. Babcock, Bruce A. & Carriquiry, Alicia L. & Stern, Hal S., 1996. "Evaluation of Soil Test Information in Agricultural Decision-Making," Staff General Research Papers 1139, Iowa State University, Department of Economics.
  5. Babcock, Bruce A. & Blackmer, A. M., 1994. "Ex Post Relationship Between Growing Conditions and Nitrogen Fertilizer Levels (The)," Staff General Research Papers 10582, Iowa State University, Department of Economics.
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