TY JOUR TI SOIL POTASSIUM STATE AND POTATO YIELD WITH CHLOROGEN-FREE POTASSIUM FERTILIZERS APPLICATION KW potato yield KW potato KW synnyrite KW chlorine-free potassium fertilizers KW exchangeable potassium KW non-exchangeable potassium KW total potassium content JO Bulletin of KSAU AU Tsyrengarmaeva, B.C. AU Syrenzhapova, A.S. AU Antropova, I.G. AU Gulyashinov, P.A. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University