TY JOUR TI NITROGEN STATUS ASSESSMENT AND CONTROL ON MEADOW-CHERNOZYOM SOILS UNDER CULTIVATION OF DIFFERENT VARIETIES OF POTATOES IN WESTERN SIBERIA KW soil KW variety KW potatoes KW diagnostics KW mineral nitrogen JO Bulletin of KSAU AU Yermokhin, Y.I. AU Temereva, I.V. PY 2016 IS PB Krasnoyarsk State Agrarian University