TY JOUR TI THE TOTAL NITROGEN CONTENT IN THE LEAVES OF SOME DECORATIVE PERENNIAL PLANTS IN THE URBAN ENVIRONMENT CONDITIONS KW iris KW daylily KW host KW leaf KW accumulation KW nitrogen KW Western Siberia JO Bulletin of KSAU AU Tsandekova, O.L. AU Sedelnikova, L.L. PY 2014 IS PB Krasnoyarsk State Agrarian University