NPK12-12-17 Compound fertilizer, NPK fertilizer 12--12-17+2MgO,NPK12-12-17 bule color, ... white color fertilizer. NPK12-12-17 Compound fertilizer, NPK fertilizer 12--12-17+2MgO,NPK12-12-17 bule color ... of proteins. The common inorganic fertilizers include ammonia (82% nitrogen), NPK combinations, urea (46% nitrogen), superphosphate, mono and dibasic ammonium phosphates ...