Experimental studies of combined coulter for direct strip sowing of seeds Oleg Pisarev, Maksim Moskovskiy, Aleksey Dorockhov, Anatoly Gulyaev and Aleksandr Lavrov MATEC Web Conf., 298 (2019) 00140 Published online: 18 November 2019 DOI: 10.1051/matecconf/201929800140