Vi fant 1 definisjoner av humic substance på engelsk.
Noun |
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| humic substance - an organic residue of decaying organic matter | ||
| organic compound any compound of carbon and another element or a radical | ||
| fulvic acid a yellow to yellow-brown humic substance that is soluble in water under all pH conditions; "they measured the fluvial fulvic acid" | ||
| humic acid a dark brown humic substance that is soluble in water only at pH values greater than 2; "the half-life of humic acid is measured in centuries" | ||