This paper synthesizes findings from recent studies on the biological dynamics within these ecosystems. The aim of the work is to establish the limits and causes of variability of biological activity of soils in mixed forests of the Greater Caucasus, to identify existing relationships and to display them in the form of mathematical models. The selected Sheki-Zagatala economic region territories that receive the largest number of tourists and have high potential for ecotourism in the Republic of Azerbaijan. The Gakh, Sheki, Oguz and Gabala regions located on the southern slopes of the Great Caucasus Mountains in the territory of the Azerbaijan Republic were selected as the study area. The ecological indicators of the research area were studied. Bioecological studies of modern soil cover are very relevant; young soil scientists can use the results obtained as literary material. The results of the study of the composition of mountain-forest brown soils of the Azerbaijan Republic provide grounds for recommending agrotechnical and soil-protective measures aimed at maintaining, preserving, and, if necessary, recreating the structure of the soil to improve the productivity and yield of agricultural crops. To increase the biological activity of soils, it is necessary to manage their redox potential and density by optimizing the species composition of stands and regulating their density. On forest nurseries, biological activity of soils is increased by liming, balanced application of organic and mineral fertilizers, use of siderates on the correct selection of which the efforts of researchers should be directed. The article shows changes in the amount of carbon dioxide, biomass and phytomass depending on the agrochemical properties of soils