Physical properties:-Organic Acids, brown black-Insoluble in water-> convert to salt water soluble humat form.Chemical properties:-The natural polymer complex compound consists of a series of closed-loop and closed-loop like the aromatic ring 5 or 6 edges of Benzene, furan, and linked by the bridge can be each separate element (-O-,-N-) or element groups (-NH-,-CH-CH = CH-,-,-OH) Role:-The land of the group element causing AH capable of creating complexes with ion Mg2 +, Ca2 +, Fe2 +, mineral, +, ...-Ability to hold water.= > Help break the link between the nutrients.= > strengthening the metabolism of protein, the activity of many enzymes.
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