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humic substance

DEFINITIONS OF: humic substance

1

n an organic residue of decaying organic matter

Types:
fulvic acid
a yellow to yellow-brown humic substance that is soluble in water under all pH conditions
humic acid
a dark brown humic substance that is soluble in water only at pH values greater than 2
humin
a black humic substance that is not soluble in water
Type of:
organic compound
any compound of carbon and another element or a radical
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