... utilization efficiency of mineral fertilizers in soil fulvic acid potassium BioFovaSoluble Yeast Extract PowderFEATURE: Extracted from yeast fermation ... , enzymes, protein, nucleic acid etc., especailly rich in potassium, easy to be absorbed by plant, correct deficiency symptoms ... 18%Fulvic Acid 46%Total Nitrogen(N) 3%Potassium Oxide(K2O) 10%Phosphorus Pentoxide(P2O5) 0.3%RECOMMENDING APPLICATIONBase ...