TY JOUR TI Structural features of pine forest crops created at various planting densities KW Scots pine KW forest crops KW planting density KW Kraft classes KW reduction numbers KW relative height JO Forestry Engineering Journal AU Merzlenko, M.D. AU Bryncev, V.A. AU Kozhenkova, A.A. PY 2026 IS 16 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov