TY JOUR TI PRODUCTIVITY AND QUALITY OF TUBERS OF EARLY-MATURING POTATOES IN THE PREPARATION OF CALCULATING DOSES OF FERTILIZERS AND IRRIGATION KW variety KW fertilizer KW balance method KW crops KW leaf surface KW photosynthetic potential KW the coefficient of photosynthetically active radiation KW dry weight of tubers KW productivity. JO Vestnik of Kazan State Agrarian University AU Mostyakova, A.A. AU Vladimirov, K.V. AU Tyaminov, A.Y. AU Vladimirov, V.P. PY 2018 IS 12 PB Kazan state agrarian University