Productivity of spring spiked crops when using biological products based on Bacillus subtilis in the conditions of the Republic of TatarstanFarit Shaikhutdinov, Igor Serzhanov, Albina Serzhanova, Razil Garaev and Pavel SemenovBIO Web Conf., 52 (2022) 00062DOI: https://doi.org/10.1051/bioconf/20225200062