TY JOUR TI Influence of geometrical parameters of the universal tillage equipment on its efficiency KW optimization KW modeling KW disc working body KW tillage tool KW convergence angle of discs KW drive piece JO Forestry Engineering Journal AU Popov, I.. PY 2014 IS 4 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov