... Ca, Mg, S, Cu, Zn,Mn, Mo Humic Acid 50-55% Granule Soil Conditioner :SpecificationAppearance: black brown granule Diameter : 2-4mm ... 4mmSolubility in waterNot soluble in waterOdorodorlessHumic acid (dry basis)50-55%Organic matter (dry basis)60-65%Content of waterNaturePH ... /PP. woven bag or 25kg / kraft paper bag with inner plastic lining Customized packing is available. Application 1. Can be used ...