... amount of nitrogen (N), phosphorus (P2O5), potassium (K2O) ≥ 170 g / l.The total amount of trace elements (boron, zinc, molybdenum, iron ... , so as to elements) ≥ 30 g / L, organic trace ≥ 80 g / L, water insoluble compounds ≤ 50 g / L, PH value 3.0 ~ 8 ... nutrients (N + P2O5 + K2O) g/L≥ 170.0Total content of trace elements (for Zn, B, Mo) g/L≥ 30.0 plant growth regulator