%0 Journal Article %T Indicators of soil fertility and crop productivity under different methods of primary tillage %A Trofimova, T.. %A Korzhov , S.. %K main soil treatment, plowing, boardless soil treatment, crop yield %J Actual directions of scientific researches of the XXI century: theory and practice %D 2014 %N 2 %P 3 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov