LMWOALow-Molecular-Weight Organic Acid
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LMWOA present in soil solutions may form complexes with Al and prevent subsequent hydrolysis and therefore further decline in soil pH.
LMWOA (in each rotation) of the tri- and di-carboxylic nature that are partially or completely dissociated at the pH of the soil solutions (pKa below [pH.
The FA and LMWOA C-fractions represent the most labile but also the most transient components of the organic carbon pool, since FA and LMWOA are constantly being introduced into the soil solution through root exudates and the decomposition reactions of macro- and microorganisms.