Agronomic Rate is the calculated biosolids application rate (dry weight basis) which provides the amount of plant-available nitrogen (PAN) needed by the crop or vegetation grown on the land; which minimizes the amount of nitrogen that passes below the root zone of the crop or vegetation grown; and which considers the amounts of phosphate (P2O5) and potash (K2O) added by the biosolids as part of the total nutrient management plan.
Refer to the Michigan State University’s Extension office publication, “Utilizing Biosolids on Agricultural Land,” for more information on agricultural rate.