TY JOUR TI METHOD OF CALCULATION OF CARBON DIOXIDE EMISSION BY MACHINE-TRACTOR UNITS IN TECHNOLOGICAL OPERATIONS, TAKING INTO ACCOUNT THE INFLUENCE OF THE PARAMETERS OF THE UNITS ON THE FORMED CROP OF GRAIN CROPS KW carbon dioxide KW machine-tractor unit KW ecology KW technological operation KW optimization of parameters KW optimization criterion JO Vestnik of Kazan State Agrarian University AU Khafizov, K.. AU Khafizov, R.. AU Nurmiev, A.A. PY 2022 IS 17 PB Kazan state agrarian University