TY JOUR TI MODELLING OF TILLAGE WORKFLOW ON SLOPING AGRICULTURAL LANDSCAPES KW MODELLING OF TILLAGE WORKFLOW ON SLOPING AGRICULTURAL LANDSCAPES JO Vestnik of Kazan State Agrarian University AU Valiullin , I.. AU Farkhutdinov , I.. AU Rakhimov, Z.S. AU Mudarisov, S.. AU Akhmetyanova , I.. PY 2016 IS 11 PB Kazan state agrarian University