Fertilizer Grade definition
Fertilizer Grade means the minimum guarantee of available plant food expressed in terms of total Nitrogen (not ammonia), Available Phosphate and Soluble Potash. The values for Total Nitrogen (N), Available Phosphate (P2O5) and Soluble Potash (K2O), expressed as the grade must coincide with the guaranteed analysis statement. Only one set of values may be used in the grade designation and with the exception of Specialty Fertilizer, the grade must be expressed in whole numbers.