humic acid


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia, Wikipedia.
Related to humic acid: fulvic acid

humic acid

A heteropolymeric mixture of organic molecules from biodegradable humis, peat and soil.

humic acid

the precipitate resulting from the addition of acid to a solution of HUMUS. Black in colour, it is insoluble in acids and organic solvents.
Mentioned in ?
References in periodicals archive ?
Thus, the value of the expression {FN/(1-IN/UN)} decreased with increase in humic acid rate, i.
Humic acids isolated from earthworm compost enhance root elongation, lateral root emergence, and plasma membrane H+ATPase activity in maize roots.
The raw fulvic acid used here was artificially extracted from a cultured plant, and the humic acid reagent was made by Nacalai Tesque.
Lahore, while humic acid was obtained from Institute of Soil and Environment Sciences, University of Agriculture, Faisalabad.
The most pronounced increases in the vegetative growth indicators TSL, PSG, NGL, TLA and PBM) were obtained from the combination of amino acids followed by humic acid with high rates of microelements (h.
Humic acid (HA) (Aldrich, UK) was used in the form of technical grade Na-Salt.
Content of Phenolic Compounds in Fulvic and Humic Acid Fractions of Forest Soils.
The effect of humic acid on the toxicity and bioavailability of trivalent chromium.
Effect of humic acid on growth and quality of maize fodder production.
As far as he knows, says Tan, this remains the only book addressing humic acid specifically, its principles, and its controversies, though other scientific studies--mostly conference proceedings--examine specialty topics about it.
Humic acid was extracted from humus by first mixing the humus with a dilute alkali and then precipitating the humic acid out of solution by acidifying the mixture to a pH of 1 to 2.