ATTEMPT AT GENETIC INTERPRETATION OF DATA ON WATER AND HEAT REGIMES OF NATURAL AND AGROGENIC SOILS

Experience in genetic interpretation of quantitative data on changes i n soil heat and moisture parameters caused by agropedogenesis is offer ed. Data on native and plowed soddy-podzolic soils and typical chernoz ems (Falenki and Kursk experimental stations, respectively) have been reassessed. A significant difference between the agropedoclimate and t he natural pedoclimate was found in all soil horizons and also in the parent rock. New types of moisture and heat profiles are described for plowed soils. Agrogenic soils display a shift in their water and temp erature regimes compared to the native ones, which, from the geographi cal standpoint, corresponds to the zonal or subzonal level and, from t he classification standpoint, to that of soil type or subtype. Similar agrogenic changes in the soil functioning should lead to the converge nce of soil properties; this process is, however, more intricate in re ality. Some methodological difficulties encountered while interpreting the data on soil water and heat regimes are considered.