... trace elements like zinc, copper, manganese, iron and boron, etc. It is of no toxicity and pollution. Amino acids ≥28%, chelated trace ... prevention, etc; increase the utilization rate and the efficiency of chemical fertilizers and pesticides and mitigate the chemical hazard on crops. III ... teas, oil-bearing crops, Chinese medicinal plants, flowers, lawn and grain crops, etc; it can also be used in drop ...