Yes. AFO/CAFO regulations require a soil test based on Phosphorous. The litter must be applied on actively growing grasses, or in row crop situations, within 30 days of planting. Cullman County Soil & Water Conservation District (CCSWCD) can help develop a plan to determine the rate of uptake for the plant. Most of the time, CCSWCD is still able to determine the Nitrogen rate of application by using buffers or rotational grazing.