TY JOUR TI SIMULATION OF THE AGGREGATESPEED MODE AND SPECIFIC INDICATORS OF THE WHEELED TRACTORS ON THE MAIN TILLAGE KW optimization KW parameter KW energy balance KW tractor KW speed KW energy saturation KW traction mode KW equivalent KW power inputs JO Bulletin of KSAU AU Selivanov, N.I. AU Zaprudskiy, V.N. AU Makeeva, Y.N. PY 2015 IS PB Krasnoyarsk State Agrarian University