Objective 2. The basis of the structure of the soil database for areas (133 points, 487 samples) with technogenic pollution in Excel Spreadsheet format with georeferencing to maps - 19 fields, which were converted in the MapInfoPro GIS application, was compiled. The database includes the main chemical and physicochemical properties of soils and data on the content of heavy metals (HM). In the future, the database will allow for a comparative assessment of the ecological state of the soils of the study area, taking into account the use of remediation techniques, to assess the degree of degradation and/or restoration of the soil cover. Unpolluted (control) dark chestnut soil, typical for the region, has favorable agrochemical and physicochemical properties. However, the level of zinc and cadmium content exceeds background values and is close to critical. For copper and lead, the content levels are within the norm and considered non-toxic, with possible influence of anthropogenic factors.
The analysis data of unpolluted dark chestnut soil show that even with favorable agrochemical parameters for plant growth and development, which provide them with the necessary nutrition, the content level of heavy metals is sufficiently high. This indicates the need for continuous agro-ecological monitoring and determination of the effect of heavy metals on phytotoxicity.
Assessment of environmental conditions of the soil by granulometric composition shows that soils with a high content of clay particles contribute to a decrease in the mobility of heavy metals, which mainly accumulate in the upper soil layers and rarely migrate below 20 cm. In sandy soils, heavy metals have a high migration capacity, penetrating into deeper horizons, where their concentrations can be either increased or decreased as a result of leaching.