TY JOUR TI GRAIN HARVESTING TECHNOLOGIES WITH ENERGY AND RESOURCE SAVING MULTIFUNCTIONAL UNITS KW energy-resource-saving technology KW grain harvesting KW combine harvester KW multifunctional unit KW optimization KW competitiveness JO Vestnik of Kazan State Agrarian University AU Yudina, E.M. AU Rinas, N.A. AU Papusha, S.K. AU Palapin, A.V. PY 2023 IS 18 PB Kazan state agrarian University