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Variable Rate Nitrogen Application on Corn Fields: The Role of Spatial Variability and Weather

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  • Roberts, Roland K.
  • Mahajanashetti, S. B.
  • English, Burton C.
  • Larson, James A.
  • Tyler, Donald D.

Abstract

Meta-response functions for corn yields and nitrogen losses were estimated from EPIC-generated data for three soil types and three weather scenarios. These metamodels were used to evaluate variable rate (VRT) versus uniform rate (URT) nitrogen application technologies for alternative weather scenarios and policy options. Except under very dry conditions, returns per acre for VRT were higher than for URT and the economic advantage of VRT increased as realized rainfall decreased from expected average rainfall. Nitrogen losses to the environment from VRT were lower for all situations examined, except on fields with little spatial variability.

Suggested Citation

  • Roberts, Roland K. & Mahajanashetti, S. B. & English, Burton C. & Larson, James A. & Tyler, Donald D., 2002. "Variable Rate Nitrogen Application on Corn Fields: The Role of Spatial Variability and Weather," Journal of Agricultural and Applied Economics, Cambridge University Press, vol. 34(1), pages 111-129, April.
  • Handle: RePEc:cup:jagaec:v:34:y:2002:i:01:p:111-129_00
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    References listed on IDEAS

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    1. Jess Lowenberg-DeBoer, 1996. "Precision Farming and the New Information Technology: Implications for Farm Management, Policy, and Research: Discussion," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 78(5), pages 1281-1284.
    2. Gary Kachanoski, 1999. "Economic Feasibility of Variable-Rate Technology for Nitrogen on Corn," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 81(4), pages 914-927.
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    1. Boyer, Christopher N. & Larson, James A. & Roberts, Roland K. & McClure, Angela T. & Tyler, Donald D. & Zhou, Vivian, 2013. "Stochastic Corn Yield Response Functions to Nitrogen for Corn after Corn, Corn after Cotton, and Corn after Soybeans," Journal of Agricultural and Applied Economics, Cambridge University Press, vol. 45(4), pages 669-681, November.
    2. Stefanini, Melissa & Larson, James A. & Boyer, Christopher N. & Cho, Seong-Hoon & Lambert, Dayton & Yin, Xinhua, 2015. "Profitability of Variable-Rate Technology in Cotton Production," 2015 Annual Meeting, January 31-February 3, 2015, Atlanta, Georgia 196995, Southern Agricultural Economics Association.
    3. Larkin, Sherry L. & Perruso, Larry & Marra, Michele C. & Roberts, Roland K. & English, Burton C. & Larson, James A. & Cochran, Rebecca L. & Martin, Steven W., 2005. "Factors Affecting Perceived Improvements in Environmental Quality from Precision Farming," Journal of Agricultural and Applied Economics, Southern Agricultural Economics Association, vol. 37(3), pages 1-12, December.

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