Pro N 16 is derived from Soy Protein Hydrolysate. Completely water soluble, Pro N 16 is a perfect Nitrogen Source.Pro N 16-0-0PRODUCT INFOPro N 16 is derived from Soy Protein Hydrolysate. Completely water soluble, Pro N 16 is a perfect Nitrogen Source.Use rates64 oz - 2 pounds per 1000 sq/ftPackaging8 pound pailLabel/Cut sheet/SDSLabel