TY CONF TI GROWTH CHARACTERISTICS AND STATE OF RUSSIAN OAK IN RAILWAY PLANTS OF THE CENTRAL FOREST-STEPPE KW protective ravine stands KW growth KW biometric indicators KW condition categories JO CONTEMPORARY CHALLENGES AND TOPICAL ISSUES OF BIODIVERSITY AND SUSTAINABILITY OF PLANT COMMUNITIES AU Turkin, A.F. AU Mikhin, V.I. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov