%0 Journal Article %T INFLUENCE OF LIGHT-GRAY FOREST SOIL TILLAGE SYSTEMS ON PRODUCTIVITY AND ENERGY EFFICIENCY OF CROPS CULTIVATION FOR GRAIN-CROP ROTATION IN VOLGO-VYATSKY REGION %A Ivenin, A.V. %A Sakov, A.P. %K energy coefficient, crop rotation, yield, straw, biological product, tillage system, zero tillage %J Vestnik of Kazan State Agrarian University %D 2020 %N 15 %P 5 %I Kazan state agrarian University