TY JOUR TI THEORETICAL STUDY OF THE WORK OF THE TRACTOR DIESEL IN APPLYING DIESEL MIXTURE FUEL BASED ON RICINIC OIL KW oil KW diesel KW mixture KW calculation KW biofuel JO Bulletin Samara State Agricultural Academy AU Sadov, A.A. AU Denezhko, L.V. AU Novopashin, L.A. PY 2019 IS 4 PB Samara State Agrarian University