%0 Journal Article %T POTATO PRODUCTIVITY DEPENDING ON THE GROWING DOSES OF NITROGEN FERTILIZERS UNDER THE IRRIGATION OF GRAY FOREST SOILS OF FOREST STEPPE IN THE MIDDLE VOLGA REGION %A Artamonov, S.G. %A Vladimirov, V.P. %K microelements, nitrogen, mineral fertilizers, productivity, potatoes (Solanum tuberosum), vitamin C, starch, protein, nitrates. %J Vestnik of Kazan State Agrarian University %D 2020 %N 14 %P 4 %I Kazan state agrarian University