The process of lessivage in profile-differentiated soils of the Pregorganian Precarpathian region
DOI:
https://doi.org/10.31073/acss88-06Keywords:
argillanes; clay fraction; granulometric composition; lessivage; Precarpathian Region; profile-differentiated soilsAbstract
Profile-differentiated soils of the Precarpathian region were formed due to the combined effect of the processes of podzolization, lessivage, gley-eluvium, for the diagnosis of which researchers use disparate diagnostic features, leads to divergences in the interpretation of their genesis and classification. The most controversial is the diagnosis of the lessivage process. The object of the study is to establish morphological and chemical diagnostic features of lessivage in the profile-differentiated soils of the Precarpathian region. Methods: comparative-geographic, profile, laboratory-analytical. Object of study: the Pregorganian Precarpathian profile-differentiated soils. In the process of field morphological research of profile-differentiated soils of the Pregorganian Precarpathian region within the limits of the І (е)m gl horizon on the upper and lateral surfaces of the boulders and pebbles inclusions, the argillanes of whitish, dirty-whitish coloring up to 1 cm are diagnosed. Тhe granulometric composition of the argillanes is heavier compared to the contents of the horizon, and the content of clay in argillanes is 20 % higher than in the І(е)m gl horizon, which is the result of the lessivage process. The accumulation in the argillanes peroxides of alkaline, alkaline-earth elements (Кх>1,0). The diagnostic feature of the lessivage of the profile-differentiated soils is equal distribution of within the profile, the ratio of SiO2:Al2O3 in the clay fraction (3,01–3,04). The diagnostic feature of the lessivage of the profile-differentiated soils is equal distribution of within the profile, which is diagnosed by the ratio of SiO2:Al2O3 in the clay fraction (3,71-3,87); the accumulation of Fe2O3 and R2O3 in the illuvial horizon in comparison with the parent material; the positive values of ЕАFe2O3, ЕАR2O3, ЕАt and ЕАm in the clay fraction, which are diagnosed in the illuvial part of the profile; predominance of the montmorillonite group minerals within the profile, which is diagnosed by the ratio of SiO2:Al2O3 in the clay fraction (3,73–3,78). Profile-differentiated soils of the Precarpathian region were formed due to the combined effect of different soil-forming processes, and for their diagnosis it is expedient to use a set of morphological, chemical, mineralogical indicators that will allow to establish the features of genesis and classification status
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