TY JOUR TI DENSITY OF SEEDING, FIELD SIMILARITY AND STRUCTURE OF SPRING WHEAT CROP, DEPENDING ON VARIETY AND PRESEEP TREATMENT OF SEEDS KW spring wheat KW productive stalk KW varieties KW number of grains per ear KW mass of grain per ear KW mass of 1000 grains KW growth regulator Nano-Gro KW seed dresser Benlat JO Vestnik of Kazan State Agrarian University AU Shashkarov, L.. AU Mefod'ev, G.A. AU Balykin, A.A. AU Serzhanov, I.. PY 2020 IS 14 PB Kazan state agrarian University