TY JOUR TI PRODUCTIVITY AND QUALITY OF SPRINT VARIETY POTATO TUBERS, DEPENDING ON PLANTING TIME KW variety KW a dose of fertilizer KW planting time KW leaf area KW productivity KW starch content KW vitamin C content KW nitrate content KW marketability. JO Vestnik of Kazan State Agrarian University AU Vladimirov, K.V. AU Gareev , I.. AU Vladimirov, V.P. AU Egorov, L.M. PY 2015 IS 10 PB Kazan state agrarian University