... 3-5% , Humic acid : 70%-75%, Trace element: Ca, Mg, S, Cu, Zn,Mn, Mo Humic Acid Soil Conditioner Granule :SpecificationAppearance: ... black brown granule Diameter : 2-4mm Humic acid (dry base): 70%-75% Organic matter (dry base): 80%-85% NPK: ... granuleSize: 2-4mmSolubility in waterNot soluble in waterOdorodorlessHumic acid (dry basis)70-75%Organic matter (dry basis)80-85%Content ...