TY JOUR TI DYNAMICS OF POTATO NUTRIENTS DEPENDING ON THE SEEDING DEPTH OF TUBERS AND ESTIMATED NORMS OF FERTILIZERS KW potato KW potassium KW phosphorus KW nitrogen KW planting density KW budding KW flowering JO Vestnik of Kazan State Agrarian University AU Samarkin, A.. AU Mefod'ev, G.A. PY 2019 IS 14 PB Kazan state agrarian University