This study aimed to determine the effects of five nitrogen doses (0, 40, 80, 120 and 160 kg. ha(-1)) on mineral content of smooth bromegrass (Bromus inermis Leyss.). Nitrogen, phosphorus, potassium, calcium, magnesium and tetany ratio were determined in this research. Nitrogen rates significantly affected all components determined in smooth bromegrass. Nitrogen applications increased N, P, K and tetany ratio but decreased Ca and Mg concentrations. The highest N, P, K concentrations and tetany ratio were obtained from 160 kg ha(-1) N treatment, while the lowest values were obtained from control treatment.