TY CONF TI CONDITION OF PEDUNCULATE OAK STANDS IN THE SHIPOV FOREST ON SOLONETZ SOILS KW pedunculate oak KW solonetz soils KW stand growth KW forest-steppe KW Shipov Forest JO CONTEMPORARY CHALLENGES AND TOPICAL ISSUES OF BIODIVERSITY AND SUSTAINABILITY OF PLANT COMMUNITIES AU Nartova, I.M. AU Popova, A.A. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov