When manure is applied in a rotation that includes
corn, recommended rates of N should be reduced according
to the source of manure, the amount applied, and the
method of application. See NebGuide G1335 Determining
Crop-Available Nutrients from Manure, (www.ianrpubs.unl.
edu/sendIt/g1335.pdf). The preplant soil nitrate test does
not estimate future manure N availability.