Calculating plant-available nitrogen and residual nitrogen fertilizer value in manure (2007)

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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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Provided for historical documentation only. Check Missouri Extension and Agricultural Experiment Station websites for current information.