TY JOUR TI CHANGES IN THE INDICATORS OF THE CROP STRUCTURE AND BARLEY PRODUCTIVITY DEPENDING ON THE LEVELS OF MINERAL NUTRITION AND LEAF FEEDING OF PLANTS KW barley (Hordeum vulgare L.) KW yield KW mineral fertilizers KW liquid complex fertilizers KW alluvial soil JO Vestnik of Kazan State Agrarian University AU Yakomaskin, S.S. AU Kargin, V.I. AU Zubarev, A.A. PY 2023 IS 18 PB Kazan state agrarian University