Diagnostics of the lithogenic heterogeneity of brownish-podzolic soils based on the soil texture analysis
DOI:
https://doi.org/10.31073/Keywords:
lithological discontinuity, particle size analysis, index of Clay-Free Basis (CFB), the brownishpodzolic soils, Retisols, Precarpathians.Abstract
Modern literature concerning the issue of lithological divergence of pedogenesis has been analyzed. The conditions
of formation of the lithological discontinuity in Precarpathian brownish-podzolic soils (Retisols according to WRB) on
the basis of particle size analysis have been shown. It was established that the transition (conversion) from the
national (according to Kachinskiy) to international (USDA/FAO) classification of soil texture did not fundamentally
change the class (no more than one class) and is possible to be used with the algorithm of Shein–Karpachevskiy.
Transition without conversion, automatically becomes impossible. In 27 out of 31 studied profiles, a lithological
discontinuity has been revealed according to index of Clay-Free Basis (CFB: relative content of the sand and silt
fractions excluding the clay). The possibility of using the index of CFB without data conversion has been shown,
under the condition of the summation of all sand and silt fractions and previous distribution of losses from acid
processing on all the fractions in carbonate soils or adding the losses to clay fraction in the soils that do not contain
carbonates. It has been revealed that the presence of vertically diversified substrates in brownish-podzolic soils
worsens soil hydraulic conductivity in 3-4 times and appreciably changes the soil-hydrological constants, especially in
illuvial part of soil profile.
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