The influence of different levels of irrigation on the grain yield of wheat was studied in a two year experiment at the National Irrigation Research Station at Nanga. The irrigation schedules were irrigation every week, every two, and every three weeks at a rate of 70, 60 and 50 percent, respectively, of the total class A pan evaporation during the whole irrigation interval. Apparent water use by wheat increased with shorter irrigation intervals. However, none of the above schedules was deemed satisfactory for obtaining maximum wheat yields.