TY CONF TI STUDY OF THE VARIABILITY OF THE PERCENTAGE OF LATE WOOD DEPENDING ON THE WIDTH OF THE ANNUAL LAYER KW wood KW percentage of late wood KW width of annual word KW growing conditions KW quality of wood JO GREEN ECONOMY: IFOREST AU Kiseleva, A.V. AU Ashmarova, T.S. PY 2022 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov