TY CONF TI VARIABILITY OF THE CARBON CYCLE IN SOILS OF NATURAL AND ANTHROPOGENICALLY TRANSFORMED ECOSYSTEMS OF THE KURSK REGION KW soil carbon fluxes KW mesoecosystems KW Al-Fe-Humus soils KW Grey-Luvic Phaeozems Hortic KW microalgae JO CIRCULAR ECONOMY FOR THE PURPOSE OF SUSTAINABLE DEVELOPMENT OF INDUSTRIES AND TERRITORIES AU Nevedrov, N.P. AU Demekhin, I.V. PY 2024 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov