Tillage is one of the most important agronomical practices especiallyfor plant height (PH), grain yield (GY) and yield components inwheat production. This study was carried out in 2007–08 and 2008–09 growing seasons in Kahramanmaras, Turkey, to investigateresponse of five wheat cultivars (Adana, Ceyhan, Dogankent,Menemen and Yuregir) to conventional (CT) and reduced tillage(RT) systems after cotton harvest for PH, number of fertile spikesper m 2 (SM), spike length (SL), number of fertile spikelets spike –1(SS), number of grains spike –1 (GS), 1000–kernel weight (KW) andGY components. The soil was ploughed at a depth of 25–30 cm in CTsystem, while it was not used in RT. The results indicated that alltraits had greater values in 2008–09 than in 2007–08 except KWand GY. The tillage systems significantly affected PH, SM, SL, SS,GS and GY except KW. Over the two years, values of all traits in CTwere higher than those of RT. There was a significant and positivecorrelation for GY, SS, GS and KW between CT and RT. Thecultivars were affected by year and tillage system. Dogankentcultivar had better performance and stable for most of the traitscompared to others under CT and RT in both years.