TY JOUR TI RUTIN AND ASCORBIC ACID CONTENT IN BUCKWHEAT GREEN MASS WITH DIFFERENT MINERAL NUTRITION KW buckwheat KW variety KW green mass KW rutin KW ascorbic acid KW mineral fertilizers JO Bulletin of KSAU AU Tymoshenko, E.V. AU Zaharova, E.V. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University