TY JOUR TI INFLUENCE OF MINERAL NUTRITION AND LEAF STRIPPER PERIODS ON PRODUCTIVITY AND QUALITY OF POTATO TUBERS IN THE MIDDLE VOLGA FOREST-STEPPE KW potatoes KW calculated doses of fertilizers KW productivity KW variety KW ripeness group KW the term of the removal of foliage and late blight KW starch content KW nitrates KW marketability. JO Vestnik of Kazan State Agrarian University AU Egorov, L.M. AU Vladimirov, V.P. AU Lisitsyn, S.. PY 2015 IS 10 PB Kazan state agrarian University