... contains many kinds of mineral nutrient elements which are necessary for crops,such as:Nitrogen(N),Phosphorus(P),Potassium(K),Boron(B ... as:humic acid,citric acid,amino acid,vitamin,polysaccharide,etc. Crops after use PENSHIBAO ,can absorb by leaves and go ... also plays other roles of activating the enzyme activity of crops,improving the efficiency of photosynthesis, adjusting the transportation and ...