Abstract
Samples from the organic horizons of taiga podzolic soils of the Komi Republic were studied, and the possible equilibria established in the soil-KCl solution system (c = 1 mol/l) at the determination of the exchangeable acidity by the Sokolov method were examined. It was shown that the exchangeable acidity was due to aluminum(III) ions in 6% of the samples with pHKCl≤4 and due to the H+ ions formed during the dissociation of water-soluble organic acids in the other samples. A group of samples from the horizons in which Fe3+ ions could appreciably contribute to the soil acidity was discriminated.
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Original Russian Text © E.V. Shamrikova, 2010, published in Pochvovedenie, 2010, No. 7, pp. 811–818.
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Shamrikova, E.V. Acidity of KCl extracts from organic horizons of podzolic soils: Sources and possible equilibria. Eurasian Soil Sc. 43, 757–764 (2010). https://doi.org/10.1134/S1064229310070057
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DOI: https://doi.org/10.1134/S1064229310070057