... kalium: 16-16- 8 NPK: 16-16-8 Form: Granular Color: Grey Compound NPK FertilizerThe product is a kind of ... of general-purpose compound (mixed) fertilizers as well as specific fertilizers with high, medium or low concentration for varied ... 1.6 Fe (or Zn, MnB), etc.l Other specific fertilizers: those applied to tea plant, rapeseed plant, wheat ... to their needs.Standard: GB15063-2001 Soluble NPK Fertilizer