Calculating plant-available nitrogen and residual nitrogen fertilizer value in manure
Manure typically is used as a fertilizer for crop production. This guide details the calculations needed to determine the fertilizer nitrogen value of manure, termed "plant-available nitrogen" (PAN). The guide also details "residual nitrogen fertilizer value" (RNFV), which is a method used to determine the amount of nitrogen released by manure in the year after application. There are also examples of incorporating an estimate of plant-available nitrogen and residual nitrogen value into a manure application recommendation for a crop.
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