TY JOUR TI Decrease in traction resistance of forest disk plows with a hydraulic actuator of working bodies KW reforestation KW deforestation KW disc plough KW hydraulic drive JO Actual directions of scientific researches of the XXI century: theory and practice AU Drapalyuk, M.V. AU Popikov, V.P. AU Sherstyukov, N.A. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov