Humic Acid Soil Conditioner Granule NPK: 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: 3-5% Trace element: Ca, Mg, S, Cu, Zn, Mn, Mo Humic Acid Granular Specification: ITEMS PROPERTIES Source:Leonardite or ...