Rego M. Z.

Purpose. The study of changes in the main agrochemical parameters in the upper layers of the gray forest soils of the Left Bank Forest-Steppe of Ukraine that were removed from agricultural processing and forested with pine, in different years. Methods. Theoretical methods included the collection and description of facts, their analysis. Empirical methods involved conducting field research on test plots of the state-owned enterprise “Chu-guevo-Babchansky LG” and farm near woodlands. Laboratory and analytical studies were performed using standardized measurement methods. The generalization of the experimental data was performed using applica-tion software packages. Results. Studies were carried out on soils under natural forest plantations, soils in inten-sive agricultural processing and unproductive soils that are derived from agricultural use. In all the studied soils, the main agrochemical parameters were compared among themselves: mobile forms of nitrogen, pH, humus content, content of common forms of nitrogen, phosphorus and potassium. Statistical dependences between agrochemical parameters in the studied variants were established. Conclusions. The results obtained indicate the revitalization and development of humification and accumulation of nutrients in old arable gray forest soils with an increase in the duration of exposure to pine forest. The age stages of the forest determine the specifics of the environmental factors that influence the soil-forming processes. In the soil of a young pine-tree (12 years), there are more cases of an increase in the coefficients of spatial variation. This indicates that the formation of young ecosystems are characterized by low resistance, in these biocenoses the dynamic equilibrium is not reached, which is characteristic of more mature pine forests.

Describes and analyzes the main natural factors and the impact of anthropogenic activity on the environ-ment, which together are decisive factors in the formation of catastrophic floods in the valley of the Dniester. The main characteristics of these floods and their implications discussed for example the Dniester modeling against flood polygon in the Ivano-Frankivsk region

Described and analyzed previous studies and the current ecological and geomorphological condition of the valley of the Dniester River in Precarpathians location within the against flood polygon model. The dependence of the ecological state heomorfosfery of natural and anthropogenic factors.