Fertilizer Phosphorous, Use it Efficiently prepared by R.D. Voss, J.R. Webb and R.W. Bohling, December 1974

(1974) Fertilizer Phosphorous, Use it Efficiently prepared by R.D. Voss, J.R. Webb and R.W. Bohling, December 1974. Iowa State University Extension

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Abstract

Applications of fertilizer phosphorus to Iowa soils deficient in phosphorus continue to give profitable crop yield increases. Economically optimum rates of fertilizer phosphorus-rates that give maximum net profit per acre-generally exceed crop removal of phosphorus on low testing soils. This results in a buildup of soil phosphorus which is reflected in higher soil test values.