TY JOUR TI Analytical study of the work process of the rotary tillage machine in nurseries KW planting material KW soil tillage KW chisel KW loosening drum KW resistance forces KW speed KW pitch KW chip thickness. JO Forestry Engineering Journal AU Kazakov, V.. AU Kazakov, I.. PY 2014 IS 4 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov