Name: First Grade Potassium Humate Trait : Black powder, easy dissolve into water Name First Grade Potassium Humate TraitBlack powder, easy dissolve into waterQuality indexHA(dry basis) ¡Ý 70%, K ... product can improve the potassium content in the soil ., accelerate the release of potassium, increase the absorb of potassium of plant. it ... to let me know.Tianjin Elong Co., Ltd. potassium humate granular