RETRACTED: Productivity of spring barley on soils of different agroecological groups of r. Tatarstan, Nizhnekamsk districtA.A. Prokhorov, O.E. Efimov, B.A. Borisov, K.D. Ageev and K.S. GoryachevBIO Web Conf., 116 (2024) 01007DOI: https://doi.org/10.1051/bioconf/202411601007