TY JOUR TI KINEMATIC ANALYSIS AND SUBSTANTIATION OF THE PARAMETERS OF A SPIRAL-SCREW WORKING UNIT OF A SOIL PROCESSING MACHINE KW presowing tillage; spiral-screw working unit KW kinematic and structural parameters JO Vestnik of Kazan State Agrarian University AU Nuriev, L.M. AU Yarullin , F.. AU Yakhin, S.M. AU Aliakberov , I.. AU Khusainov, R.. PY 2020 IS 15 PB Kazan state agrarian University