A comprehensive assessment of dendrological resources for the formation of forest reclamation complexes is a process of qualitative and quantitative expansion of economically important plants and a scientifically based choice of the best possible option. The development of methods for improving the bioresources of degraded landscapes is aimed at the adaptive organization of land use in forestry and water management, recreation, urban planning, landscaping of settlements based on a comprehensive assessment of dendrological resources and increasing their biodiversity. The Federal Research Center of Agroecology of the Russian Academy of Sciences for a long period of its existence has created a network of experimental stations (cadastre № 34:34:000000:122, 34:34:060061:10; Nizhnevolzhskaya station for the selection of tree species; 34:36:000014:178; West Siberian AGLOS; 22:23:010003:0014; Volga AGLOS; №63:23:0908001:0002) with dendrological collections located in different soil and climatic zones (Altai Krai, Samara and Volgograd regions) - typical areas of the arid zone with stable and moderate (in some years acute) summer moisture deficiency.