... a variety of general-purpose compound (mixed) fertilizers as well as specific fertilizers with high, medium or low concentration for varied ... to customers requirements.l Varieties of commonly used compound (mixed) fertilizers (proportion of nitrogen, phosphate and kalium): 10-10-10, ... -1.6 Fe (or Zn, MnB), etc.l Other specific fertilizers: those applied to tea plant, rapeseed plant, wheat, corn, ...