TY JOUR TI DESCRIPTION OF THE PARAMETERS OF THE ELLIPSE NEEDLE DISC OF THE SOIL PROCESSING TOOL KW tillage tool; elliptical needle disc; design parameters JO Vestnik of Kazan State Agrarian University AU Aliakberov, I.I. AU Yakhin, S.M. AU Nuriev, L.M. PY 2021 IS 16 PB Kazan state agrarian University