%0 Journal Article %T ROTATIONAL TOOL TO SURFACE SOIL TILLAGE BY ELLIPTICAL DISCS %A Aliakberov , I.. %A Yakhin, S.M. %A Gaynutdinov, R.H. %K surface soil tillage, disc-type rotary tools, constructive and technological parameters. %J Vestnik of Kazan State Agrarian University %D 2016 %N 11 %P 3 %I Kazan state agrarian University