Diagnosis of solonetzic process in virgin and agrogenically transformed soils of different regions

To diagnose solonetzic process in virgin and agrogenically transformed soils of solonetzic soil complexes in the chernozemic and chestnut soil zones of European Russia and Western Siberia, their swelling kinetics and physicochemical characteristics were been studied. It was shown that a simultaneous application of these two approaches is more efficient than their separate use. The degree of manifestation of solonetzic process in the studied soils was determined. Swelling curves of sodic reclaimed solonetzes of Lyubinsk district of Omsk oblast and of a virgin solonetz of the Baraba Lowland with a moderate content of adsorbed sodium proved to be similar to those described for the vertic soils with a low infiltration capacity in the North Caucasus.