Each treatment plant produces biosolids having unique properties. These properties minimize risks associated with heavy metals and pathogens. The regulations for land application of biosolids relate to categories of biosolids management. In all other cases, calculate the quantity of biosolids applied in a calendar year based upon the crop needs. The crop yield goal used for such a calculation must be appropriate for the location, average weather conditions and fresh water irrigation if used.
Crop requirements The plant nutrients in biosolids are mostly organic.
The crop need for N depends upon the use of the plant material, the plant species and dry matter yield potential. Tables 1 and 2 list many crops that may be grown in Missouri. The data are expressed in pounds per yield unit. Soil Test Interpretations and Recommendations Handbook , Department of Agronomy, University of Missouri. Estimated nutrient removals by hay and silage.