TY CONF TI STUDY OF GEOGRAPHICAL VARIABILITY USING THE EXAMPLE OF TEST CROPS OF PINUS SYLVESTRIS L. IN THE KHRENOVSKY FOREST KW geographical variability KW Pinus sylvestris KW forest breeding KW genetics KW height KW diameter KW correlation JO SCIENCE AND STUDENTS – 2025 AU Pivovarov, M.V. AU Tseplyaev, A.N. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov