TY JOUR TI POTATO VARIETIES PRODUCTIVITY DEPENDING ON THE USE OF PLANT GROWTH REGULATORS IN THE CONDITIONS OF THE SOUTHERN NON-CHERNOZEM REGION KW growth regulators KW new potato varieties KW potatoes KW potato quality characteristics KW growth regulator efficiency KW potato yield JO Bulletin of KSAU AU Pityurina, I.S. AU Zubkova, T.V. AU Vinogradov, D.V. PY 2026 IS 0 PB Krasnoyarsk State Agrarian University