Abstract: The study was carried out with the aim to determination the effects of late-season foliar N application on grain yield and protein content of Triticale. The research was conducted in arid land of Lakes region in Turkey during 2006-2008 growing seasons. The experiment was set up as randomized complete block design with a split-plot design with 3 replications. Triticale cultivars were main plots, the nitrogen were subplots split within main plots. In the study, winter/alternative Triticale cultivars (Tacettinbey, Tatlicak-97 and Karma-2000) were used. Nitrogen was applied as conventional (2 equal amounts at the time of seed sowing and tillering stage) and late-season foliar N application (1/3 of was applied during sowing, 1/3 at the tillering stage and the rest was applied to foliar at postpollination growth stage). In the study, effects of late-season foliar N application on grain yield and protein content of triticale were observed. Grain yield and protein content of triticale in both years of the study were significantly affected by N application timing. The results showed that the grain yield and grain protein content were higher in late-season foliar N application than conventional N application in both years of the study. Among the cultivars, the highest grain yield and protein content was obtained from Tatlicak-97 (2720 kg ha^-1) and Karma-2000 (13.1%) cultivars, respectively. The highest grain yield was determined from Tatlicak cultivar x late-season N interaction (2646, 2987 and 2815 kg ha^-1, respectively) in both years and average of years. The highest protein content was determined from Karma-2000 cultivar x late-season N interaction (13.8, 13.9 and 13.9%, respectively) in both years and average of years. Between grain yield and protein content was determined significant (p≤0.01) and positive connection (r² = 0.451).