TY CONF TI PERFORMANCE ANALYSIS OF FOREST MACHINERY USING A COMPREHENSIVE TIME RATE KW logging operations KW forestry operations KW forest machinery KW productivity of forest machinery KW complex time rate JO FORESTRY IN THE CONTEXT OF GLOBAL CHALLENGES: NEW PARADIGMS OF SUSTAINABLE DEVELOPMENT. FORESTRY - 2025 AU Shvetsov, A.S. AU Dolzhikov, I.S. AU Grigoreva, O.I. 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