McKenzie Cain March 17, 2023 David Hula to Attend Conservation Tillage & Technology Conference (CTC) McKenzie Cain March 17, 2023 The Conservation Tillage & Technology Conference (CTC) will be held in- person March 14-15 at Ohio Northern University in Ada. The first day of this year’s conference will feature David Hula, four-time winner of the National Corn Growers Association Yield Contest and current record holder at 616 bushels per acre – all accomplished with no-till and strip-till.