%0 Journal Article %T EFFICIENCY OF GRAIN-CROP ROTATION, DEPENDING ON SEEDING OF MANURE, STRAW AND INTERMEDIATE SIDERATE %A Akhmetzyanov, M.R. %A Talanov, I.P. %K crop rotation, addition density, structure of aggregates, humus, productivity %J Vestnik of Kazan State Agrarian University %D 2020 %N 14 %P 4 %I Kazan state agrarian University