%0 Journal Article %T INFLUENCE OF CALCULATED BACKGROUNDS OF MINERAL NUTRITION AND PLANTING DENSITY ON PRODUCTIVITY AND QUALITY OF EARLY-MATURING POTATOES IN THE CONDITIONS OF FOREST-STEPPE OF MIDDLE VOLGA %A Kokrov, A.Y. %A Gaynutdinov, M.. %A Vladimirov, V.P. %A Sitnikova, N.V. %K potatoes, planting density, fertilizer doses, productivity, starch content, dry matter, nitrates. %J Vestnik of Kazan State Agrarian University %D 2018 %N 13 %P 4 %I Kazan state agrarian University