... % , Humic acid : 70%-75%, Trace element: Ca, Mg, S, Cu, Zn,Mn, Mo Humic Acid Soil Conditioner Granule :SpecificationAppearance: black brown ... %-85% NPK: 3-5% Trace element: Ca, Mg, S, Cu, Zn, Mn, Mo Humic Acid Granular Specification: ITEMS PROPERTIES Source:Leonardite ...