Parameters of tillage working bodies Abdulhay Obidov, Karimjon Nuriev, Madrahim Allanazarov, Ermamat Kurbonov and Rustam Khudoyberdiev E3S Web Conf., 284 (2021) 02012 Published online: 12 July 2021 DOI: 10.1051/e3sconf/202128402012