TY JOUR TI EFFECT OF INORGANIC AND CHELATE FORMS OF ZINC- AND COPPER-CONTAINING FERTILIZERS ON WHEAT GRAIN PRODUCTIVITY AND QUALITY CHARACTERISTICS KW trace elements KW copper KW zinc KW chelates KW winter wheat KW spring wheat KW productivity KW gluten KW protein JO Bulletin of KSAU AU Kodochilova, N.A. AU Buzynina, T.S. AU Semenov, V.V. AU Petrov, B.I. PY 2023 IS 0 PB Krasnoyarsk State Agrarian University