A conceptual framework for judging the precision agriculture hypothesis with regard to site-specific nitrogen application

A conceptual framework for judging the precision agriculture hypothesis with regard to... In this study we derive a test that aims to show that the economic optimum nitrogen applications in site-specific management zones are different. In addition, a confidence interval is derived for the difference between optima, and here we show that separate confidence intervals for either optimum are not as good as the former for judging the precision agriculture hypothesis. Both the test and the confidence interval for the difference are based on modeling the returns above N fertilizer cost by quadratic functions of the nitrogen rate. The data are from an N-rate trial at a heterogeneous field in Thalhausen, Germany. This trial could barely support the economic benefit of precision agriculture. A statistical proof that high- and low-yielding zones should be discriminated against just failed to meet the standard 5% level. We also discuss what design of nitrogen fertilizer levels should be used for the test and the confidence intervals. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Precision Agriculture Springer Journals

A conceptual framework for judging the precision agriculture hypothesis with regard to site-specific nitrogen application

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Publisher
Springer Journals
Copyright
Copyright © 2008 by Springer Science+Business Media, LLC
Subject
Life Sciences; Agriculture; Soil Science & Conservation; Remote Sensing/Photogrammetry; Statistics for Engineering, Physics, Computer Science, Chemistry and Earth Sciences; Atmospheric Sciences
ISSN
1385-2256
eISSN
1573-1618
D.O.I.
10.1007/s11119-008-9069-x
Publisher site
See Article on Publisher Site

Abstract

In this study we derive a test that aims to show that the economic optimum nitrogen applications in site-specific management zones are different. In addition, a confidence interval is derived for the difference between optima, and here we show that separate confidence intervals for either optimum are not as good as the former for judging the precision agriculture hypothesis. Both the test and the confidence interval for the difference are based on modeling the returns above N fertilizer cost by quadratic functions of the nitrogen rate. The data are from an N-rate trial at a heterogeneous field in Thalhausen, Germany. This trial could barely support the economic benefit of precision agriculture. A statistical proof that high- and low-yielding zones should be discriminated against just failed to meet the standard 5% level. We also discuss what design of nitrogen fertilizer levels should be used for the test and the confidence intervals.

Journal

Precision AgricultureSpringer Journals

Published: Jul 10, 2008

References

  • Adding value to spatially managed inputs by understanding site-specific yield response
    Bullock, D. S.; Lowenberg-DeBoer, J.; Swinton, S. M.

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