%0 Journal Article %T SECURITY OF MACRONUTRIENTS SUPPLY AND FORECASTING OF SPRING WHEAT PRODUCTIVITY IN THE REPUBLIC OF TATARSTAN %A Glushko, S.. %A Galiullin , I.. %K actual and moving average wheat productivity, mobile macronutrients of phosphorus and potassium, mineral and organic fertilizers, simple and multiple correlation. %J Vestnik of Kazan State Agrarian University %D 2014 %N 9 %P 3 %I Kazan state agrarian University