%0 Journal Article %T SUBSTANTIATION OF THE OPTIMAL LEVEL OF TRACTORS’ OPERATION IN AGRICULTURAL PRODUCTION %A Khusainov, R.. %A Galiev, I.G. %A Gabdrafikov, F.Z. %A Muhametzyanov, D.N. %A Yarullin , F.. %K optimization, operating level, operating conditions, resource consumption, increased efficiency, generalized factors, determining factors, unit costs %J Vestnik of Kazan State Agrarian University %D 2020 %N 14 %P 4 %I Kazan state agrarian University