TY JOUR TI INFLUENCE OF AGROCHEMICAL MEASURES ON CHANGES IN MACROELEMENT COMPOSITION OF ROOT VEGETABLES OF ROOT CHICORY AND BALANCE OF ELEMENTS DURING ITS CULTIVATION KW organic and mineral fertilizers KW root chicory KW nutrients KW balance KW gray forest soil KW Bryansk region JO INTERNATIONAL AGRICULTURAL JOURNAL AU Purgina, A.V. AU Smolsky, E.V. PY 2026 IS 9 PB Electronic science