... : 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): ... , S, Cu, Zn, Mn, Mo Humic Acid Granular Specification: ITEMS PROPERTIES Source:Leonardite or Lignite Appearanceblack brown granuleSize: 2-4mmSolubility ...