Environmental and Resource Economics

, Volume 9, Issue 3, pp 323–340

Do farmers overuse nitrogen fertilizer to the detriment of the environment?


  • Satya N. Yadav
    • Department of Agricultural Economics & Rural SociologyUniversity of Arkansas
  • Willis Peterson
    • Department of Applied EconomicsUniversity of Minnesota
  • K. William Easter
    • Department of Applied EconomicsUniversity of Minnesota

DOI: 10.1007/BF02441403

Cite this article as:
Yadav, S.N., Peterson, W. & Easter, K.W. Environ Resource Econ (1997) 9: 323. doi:10.1007/BF02441403


Increasing use of nitrogen fertilizer in U.S. agriculture has led to nitrate contamination of water resources. The main objective of the study is to determine if the current use of nitrogen exceeds the profit-maximizing level, since reducing such discrepancy, if any, could raise farmers' profitability and enhance water quality making it a win-win situation. Specific objectives of the study, however, are two-fold. First, develop an appropriate methodology for estimation of an agronomic production function utilizing panel data with several treatments from experimental plots. Second, using experimental data from 1987 through 1990 for three farm sites in southeastern Minnesota, empirically estimate the production function and profit maximizing level of nitrogen application.

Our results show that both the current recommended rate, 150 1b/acre, and farmers' use, 176 1b/acre, of nitrogen exceed the profit maximizing level of nitrogen in the region. It is shown that the recommended rate needs to be revised and made more site or area specific rather than a general figure for the entire region. The study shows considerable residual nitrogen build-up in the soil profile, implying that farmers have been applying more nitrogen than could be utilized by corn plants. The later finding highlights the importance of soil testing for plant nutrients when making decisions on fertilizer application.

Key words

ground water contaminationnitrate contaminationnitrogen overuseprofit maximization
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© Kluwer Academic Publishers 1997