TY JOUR TI INFLUENCE OF SOWING TECHNIQUES ON PRODUCTIVITY AND BIOCHEMICAL COMPOSITION OF OIL-SEEDS OF SPRING RAPE VARIETIES IN THE MIDDLE URALS KW rape KW yield KW sowing techniques KW biochemical analysis KW oilseeds KW gross collection of fat JO Vestnik of Kazan State Agrarian University AU Selyakov, A.A. AU Bogatyreva, A.S. AU Akmanaev, E.D. PY 2019 IS 14 PB Kazan state agrarian University