TY JOUR TI ENERGY OPTIMIZATION METHOD OF MAIN PARAMETERS OF TRACTORS KW the parameters of tractor KW weight KW power KW optimization KW a mathematical model of the unit KW total energy consumption. JO Vestnik of Kazan State Agrarian University AU Khafizov, K.. AU Khafizov, R.. PY 2015 IS 10 PB Kazan state agrarian University