Can Soil Testing Improve Fertilizer Nitrogen Management?

By R.L. Mulvaney, S.A. Khan, T.R. Ellsworth. CSA News March 2006. Examination of the proven-yield (PY) method of N recommendations. Per Dr. Mulvaney: "It was disturbing to see how poorly this method performed...In fact, on average, the error itself was greater than the economically optimum N rate."

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2006 CSA News article (condensed).pdf

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