TY JOUR TI Reserves of phytomass of understory rocks and their growth in forest-steppe ecosystems of the Oka-Don Don plain KW undergrowth KW phytomass KW carbon stocks KW forest-steppe KW annual growth KW permanent sample plots KW biological productivity KW plant community structure JO Forestry Engineering Journal AU Kartashova, N.P. PY 2025 IS 15 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov