Humic acid is a black or brown-black amorphous organic weak acid mixture with aromatic and aliphatic groups and functional groups.The standards classify humic acid into mineral humic aicd and bio humic aicd. What is the difference between them?
With the increase of fertilizer efficiency, humic acid combined with nitrogen, the yield of nitrogen fertilizer can be increased by about 10%, and the utilization rate of phosphorus can be more than doubled.
Humic acid cation exchange capacity is big and has the strong adsorption of buffer and chelating ability, can improve the utilization rate of nutrients in the soil and Buffer acid and base hazards.
Humic acid is a kind of high polymer heterogeneous aromatic material contains hydroxyl, carboxyl, phenolic hydroxyl and other active groups. It is weak acidity and insoluble in water but in alkaline.