TY JOUR TI ECOLOGICAL ASSESSMENT OF THE ACTION OF SELENIUM IN A SOIL-PLANT SYSTEM IN THE CONDITIONS OF WESTERN SIBERIA KW JO Bulletin of Nizhnevartovsk State University AU Aleksandrovskaia, E.I. AU Sindireva, A.V. AU Ieronova, V.V. PY 2020 IS PB Nizhnevartovsk State University