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Managing Phosphorous Soil Dynamics Over Space And Time

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  • Lambert, Dayton M.
  • Lowenberg-DeBoer, James
  • Malzer, Gary L.

Abstract

Understanding the relationship between soil fertility dynamics and crop response is conceptually appealing. Even more appealing is comprehension of the spatial and temporal heterogeneity of these connections over a production surface and across seasons. Knowledge of these interactions is complicated because nutrient carryover dynamics and crop response to inputs are determined simultaneously on the one-hand, and sequentially on the other. A second problem enters when crops are rotated, for example, in the corn-soybean system commonly practiced in the Corn Belt. This paper examines the nutrient carryover-crop response nexus using data from a corn-soybean, variable-rate nitrogen (N) and phosphorous (P) experiment conducted over five years. Site-specific corn response to N and P and soybean response to P are simultaneously estimated with a P carryover equation. These estimates are used in a dynamic programming model to map site-specific optimal N and P fertilizer policies, soil P evolution, and profitability. The net present value of managing N and P site-specifically is compared to a strategy where these inputs are managed uniformly following extension guidelines. The results suggest that when P-carryover is managed, site-specific returns to the variable-rate strategies are higher than returns to a conventional, uniform strategy.

Suggested Citation

  • Lambert, Dayton M. & Lowenberg-DeBoer, James & Malzer, Gary L., 2005. "Managing Phosphorous Soil Dynamics Over Space And Time," 2005 Annual meeting, July 24-27, Providence, RI 19452, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
  • Handle: RePEc:ags:aaea05:19452
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    File URL: http://purl.umn.edu/19452
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    References listed on IDEAS

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    1. Léonard,Daniel & Long,Ngo van, 1992. "Optimal Control Theory and Static Optimization in Economics," Cambridge Books, Cambridge University Press, number 9780521331586.
    2. Kennedy, John O.S. & Whan, Ian F. & Jackson, R. & Dillon, John L., 1973. "Optimal Fertilizer Carryover And Crop Recycling Policies For A Tropical Grain Crop," Australian Journal of Agricultural Economics, Australian Agricultural and Resource Economics Society, vol. 17(02), August.
    3. Luc Anselin & Rodolfo Bongiovanni & Jess Lowenberg-DeBoer, 2004. "A Spatial Econometric Approach to the Economics of Site-Specific Nitrogen Management in Corn Production," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 86(3), pages 675-687.
    4. Alban Thomas, 2003. "A dynamic model of on-farm integrated nitrogen management," European Review of Agricultural Economics, Foundation for the European Review of Agricultural Economics, vol. 30(4), pages 439-460, December.
    5. Chavas, Jean-Paul, 1999. "On Dynamic Arbitrage Pricing and Information: The Case of the US Broiler Sector," European Review of Agricultural Economics, Foundation for the European Review of Agricultural Economics, vol. 26(4), pages 493-510, December.
    6. Bullock, David S. & Lowenberg-DeBoer, Jess & Swinton, Scott M., 2002. "Adding value to spatially managed inputs by understanding site-specific yield response," Agricultural Economics, Blackwell, vol. 27(3), pages 233-245, November.
    7. Popp, Jennie S. Hughes & Griffin, Terry W., 2000. "Profitability Of Variable Rate Phosphorus In A Two Crop Rotation," 2000 Annual meeting, July 30-August 2, Tampa, FL 21806, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).
    8. Linda Whipker & jay Akridge, 2006. "2006 Precision Agricultural Services Dealership Survey Results," Working Papers 06-10, Purdue University, College of Agriculture, Department of Agricultural Economics.
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    Cited by:

    1. Lambert, Dayton M. & English, Burton C. & Harper, David C. & Larkin, Sherry L. & Larson, James A. & Mooney, Daniel F. & Roberts, Roland K. & Velandia, Margarita & Reeves, Jeanne M., 2014. "Adoption and Frequency of Precision Soil Testing in Cotton Production," Journal of Agricultural and Resource Economics, Western Agricultural Economics Association, vol. 39(1), April.
    2. Iho, Antti & Laukkanen, Marita, 2009. "Dynamically Optimal Phosphorus Management and Agricultural Water Protection," Discussion Papers 54285, MTT Agrifood Research Finland.

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    Keywords

    Crop Production/Industries;

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