TY JOUR TI ASSESSMENT OF THE TRACTORS TECHNICAL CONDITION AT THE AGRO-INDUSTRIAL ENTERPRISES OF THE OMSK REGION, TAKING INTO ACCOUNT THE COSTS OF ELIMINATING EMERGING FAILURES KW tractor KW failure KW maintenance KW repair KW operation KW engine JO Vestnik of Omsk SAU AU MYALO, O.V. PY 2026 IS 61 PB FSBEI HE Omsk SAU