TY JOUR TI POTATO YIELDS AND QUALITY INDICATORS WHEN USING DIFFERENT DOSES AND RATIOS OF MINERAL FERTILIZERS IN THE MIDDLE PRE-URALS KW potato KW mineral fertilizers KW factorial experiment KW potato yield KW starch KW dry matter KW nitrate nitrogen JO Bulletin of KSAU AU Shishkov, D.G. AU Vasbieva, M.T. AU Yamaltdinova, V.R. AU Safiullina, D.R. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University