TY CONF TI PRELIMINARY ASSESSMENT OF THE CONDITION AND FORMATION OF PINUS SIBIRICA DU TOUR MACROSTRIBLES IN A COLLECTION OF CLONES IN THE CONDITIONS OF THE KURSK REGION KW valuable genotypes KW cedar pines KW cedar orchards KW and nut-producing grafted cedar plantations JO CONTEMPORARY CHALLENGES AND TOPICAL ISSUES OF BIODIVERSITY AND SUSTAINABILITY OF PLANT COMMUNITIES AU Yeskov, V.A. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov