TY JOUR TI Theoretical prerequisites for the creation and some practical results of studying the birch gene pool in the Voronezh region KW introduction KW ontogenesis KW growth in height KW self-pollination KW open-pollination KW B. manchurian (Betula mandshuri-ca (Regel) Nakai) KW B. poplar-leaved (Betula populifolia Marshall) KW B. elm-leaved (Betula ulmifolia Cham.) JO Forestry Engineering Journal AU Isakov, I.Y. PY 2024 IS 14 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov