GEOINFORMATIONAL ASSESSMENT OF AGRO-LANDSCAPES AT THE TEST RANGE "BLACK LANDS"
Introduction The change in the state of geosystems in semi-desert conditions in natural conditions goes through the stages of natural change in the state associated with the manifestations of a decrease in the projective cover in unfavorable conditions and restoration under favorable conditions. At the same time, irrational anthropogenic use of lands leads to critical degradation of the ecosystem, accompanied by a deterioration in both quantitative and qualitative characteristics of agricultural landscapes. The processes of restoration of the natural state of ecosystems are long in time and can take from several to thousands of years. In this regard, an important scientific task is to study the state of agricultural landscapes and their changes. Materials and methods. The study is based on geoinformation analysis of remote sensing data from space - Sentinel 2 satellite images and «SRTM terrain model». Results and Conclusions. As a result of geoinformation research, the main characteristics of the lands were established. The soil conditions at the polygon are represented by low-humus, thin brown soils in combination with sands (72% of the landfill area) and sandy massifs (28%). Natural plant associations of Sarepta feather grass (Stipa sareptana), fescue ( Festuca valesiaca ), wheatgrass ( Agropyron pectinatum ), white wormwood ( Artemisia lercheana ), ebelek ( Ceratocarpus arenarius ) and tyrsa (Stipa capillata) have a projective cover from 5 to 10% On brown soils over 25%. The phytomeliation carried out about 40 years ago by planting gray teresken ( Krascheninnikovia ceratoides ) made it possible to stop the negative processes of desertification, and gray teresken proved to be an effective phytomeliorant. A negative factor of impact on the plant ecosystem was the impact of steppe fires, which destroyed the aboveground parts of plants in 2020 on an area of 6430 hectares, which is almost 70% of the area of the test site.