TY CONF TI CONDUCTING RESEARCH OF A DEEP SUBSOILER IN FIELD CONDITIONS KW subsoiler KW soil cultivation KW descriptive statistical characteristics KW field research JO ENERGY-SAVING AND ENVIRONMENTALLY SAFE TECHNOLOGIES OF THE TIMBER INDUSTRY – 2025 AU Bolgov, A.V. AU Malyukov, S.V. AU Shavkov, M.V. AU Petkov, A.F. AU Cherenkov, D.S. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov