TY JOUR TI BIOLOGICAL GROUPS OF WEEDS IN CROPS OF SPRING WHEAT KW weeds KW species composition KW young weeds KW perennial weeds KW young monocotyledonous KW dicotyledonous young KW spring wheat KW soil treatment KW primary treatment KW machining depth KW reducing the depth of processing KW fine processing KW zero processing KW biological groups of weeds JO Agrarian Bulletin of the AU Rzaeva, V.V. PY 2018 IS 175 PB Ural State Agrarian University