TY JOUR TI EFFECT OF LONG-TERM USE OF MINERAL FERTILIZERS FOR AGROCHEMICAL PROPERTIES SOD-PODZOLIC SOIL OF HAYFIELD KW hayfield KW mineral fertilizers KW long-term effect KW microelements KW toxic elements KW environmental safet JO Adaptive Fodder Production AU Chuykov, V.A. AU Teberdiev, D.M. AU Rodionova, A.V. AU Zapivalov, S.A. PY 2021 IS 2021 PB Federal Williams Research Center of Forage Production and Agroecology