%0 Journal Article %T Winter wheat yield and environment formation potential of perennial legumes as a factor of biologization agriculture %A Grebennikov, V.G. %A Shipilov, I.A. %A Khonina, O.V. %K biologization, crop rotation, black steam, predecessor, winter wheat, perennial legumes, organic matter, grass productivity, grain yield. %J Agrarian Bulletin of the %D 2019 %N 189 %P 6 %I Ural State Agrarian University