Concept information
Terme préférentiel
humic acid
Définition
- Humic substances (HS) are organic compounds that are important components of humus, the major organic fraction of soil, peat, and coal (and also a constituent of many upland streams, dystrophic lakes, and ocean water). Humic acids are high molecular weight, base-soluble, acid-precipitated organic compounds produced in situ by the polymerization of lower molecular weight compounds (Abbott and Stafford, 1996). Thanks to their hydrophilic carboxylic acid functional groups, they can retain about fifteen times their weight in water and thus play a fundamental role in the water retention and useful water reserve of a soil. (Adapted from: D. M. Anderson & R. B. Archer (1999). Palaeogeography, Palaeoclimatology, Palaeoecology, 146, 295-301. and https://en.wikipedia.org/wiki/Humic_substance and translated from: https://fr.wikipedia.org/wiki/Acide_humique)
Concept générique
Traductions
-
français
URI
http://data.loterre.fr/ark:/67375/QX8-24D2GNPZ-H
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