The influence of barley weed impurities on the microbiological quality indicators Elena Belokurova, Ilona Pankina, Anna Sevastyanova, Irina Asfondyarova and Nina Katkova E3S Web Conf., 161 (2020) 01072 Published online: 15 April 2020 DOI: 10.1051/e3sconf/202016101072