TY JOUR TI The results of experimental research of rotational conical working unit in the soil canal KW soil tillage KW conical working unit KW draft resistance KW soil canal KW strain-gage testing. JO Vestnik of Kazan State Agrarian University AU Yarullin , F.. AU Ibyatov, R.. AU Valiev, A.R. AU Shiriyazdanov , R.. PY 2014 IS 9 PB Kazan state agrarian University