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Economic and environmental implications of soil nitrogen testing: a switching-regression analysis


American Journal of Agricultural Economics 77(4): 891-900
Economic and environmental implications of soil nitrogen testing: a switching-regression analysis
A simultaneous equations, or "switching-regression," model is developed to assess the impact of soil nitrogen (N) testing on N fertilizer use, crop yields, and net returns in corn growing areas of Nebraska. The results indicate that when there is uncertainty about the quantity of available "carry-over" N, N testing enables farmers to reduce fertilizer use without affecting crop yields. However, the value of information from N tests depends critically on cropping history and soil characteristics. These findings have implications for environmental and technology transfer policies designed to reduce nonpoint source water pollution.

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Accession: 002808311

DOI: 10.2307/1243812



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