TY JOUR TI STUDY THE IMPACT OF BIOPREPARATIONS AND GROWTH STIMULATORS APPLICATION ON USEFUL MICROFLORA AND PRODUCTIVITY OF POTATO KW potatoes KW biological products KW useful microflora KW humic fertilizers KW bacterization of tubers KW productivity. JO Vestnik of Kazan State Agrarian University AU Cheremisin, A.I. AU Kumpan, V.N. PY 2018 IS 13 PB Kazan state agrarian University