Humic acids and fulvic acids, which begin as raw organic matter, are important constituents of humus.
12.
Clay minerals in the A horizon decompose by reaction with humic acids and form soluble salts.
13.
Fulvic acid is of relatively low molecular mass and is biologically more active than humic acid.
14.
The presence of carboxylate and phenolate groups gives the humic acids the ability to form chelate complexes.
15.
These organic acids are mainly humic substances, which can be categorized into fulvic and humic acid fraction.
16.
The mixture is heated to inactivate the enzymes and then filtered to remove the insoluble humic acid.
17.
Heat is used to increase the solubility of humic acids and hence more potassium humate can be extracted.
18.
The organic components can be subdivided into fractions that are soluble, largely humic acids, and insoluble, the humins.
19.
As a result, the water entering the river tends to be acidic and often coloured brown with humic acids
20.
"Brevibora dorsiocellata " inhabits streams and other watercourses characterised by a mineral-deficient and acidic chemistry, featuring dissolved humic acids.
