TY JOUR TI Potato yield after electromagnetic treatment with weak non-ionizing impulsive fields KW potatoes KW electromagnetic fields KW productivity JO Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences AU Zaynullin, V.G. AU Shul'gina, E.A. PY 2022 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"