Development and research of tillage operating device with polymeric materials Igor Bozhko, Galina Parkhomenko, Sergey Kambulov, Andrey Boyko, Vladimir Kolodkin, Magomed Magomedov and Dmitriy Rudoy E3S Web Conf., 175 (2020) 05025 Published online: 29 June 2020 DOI: 10.1051/e3sconf/202017505025