... Compound NPK FertilizerThe product is a kind of granular solid fertilizer consisting of nitrogen (N), phosphate (P2O5), kalium (K2O) and many ... variety of general-purpose compound (mixed) fertilizers as well as specific fertilizers with high, medium or low concentration for varied demands ... 4-1.6 Fe (or Zn, MnB), etc.l Other specific fertilizers: those applied to tea plant, rapeseed plant, wheat, corn ...