Selection of operating modes of tillage implement with ring working tools by criteria of quality and energy inputsN.I. Dzhabborov, A.V. Dobrinov, A.V. Sergeev, V.I. Shamonin and A.N. PerekopskiyE3S Web of Conf., 222 (2020) 01019DOI: https://doi.org/10.1051/e3sconf/202022201019