%0 Journal Article %T The chemical composition of the solid fraction products biogas plant, OOO "NPO "Agrobiogaz" %A Vasil'ev, O.A. %A Kir'yanov, D.P. %K biofertilizer, biogas plant products, chemical composition. %J Vestnik of Kazan State Agrarian University %D 2018 %N 12 %P 2 %I Kazan state agrarian University