TY CONF TI CURRENT ISSUES IN RESEARCH ON THE EFFECTS OF FOREST MACHINERY PROPELLERS ON FOREST SOILS AND CRYOLITHOZONES ON SLOPES KW forest machinery KW soils KW permafrost KW forests on the slopes JO ENERGY-SAVING AND ENVIRONMENTALLY SAFE TECHNOLOGIES OF THE TIMBER INDUSTRY – 2025 AU Kalyashov, V.A. AU Gur'ev, A.Y. AU Grigor'ev, I.V. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov