TY JOUR TI FORMATION OF THE ASSIMILATION SURFACE OF POTATO LEAVES, DEPENDING ON SEEDING DEPTH OF TUBERS AND PRE-SOWING TREATMENT METHODS KW potato KW planting depth KW photosynthesis KW leaf surface KW budding KW flowering JO Vestnik of Kazan State Agrarian University AU Shashkarov, L.. AU Samarkin, A.. AU Mefod'ev, G.A. PY 2019 IS 14 PB Kazan state agrarian University