This study was conducted to investigate the influence of the level of nitrogen fertilization and cutting date on the nitrate accumulation in Italian ryegrass and forage corn. Italian ryegrass and forage corn were applied with three different levels of nitrogen fertilization(10, 20 and 40kg N/10a), and the experiment was performed at the field of CNU in kwang-ju, from 1986 to 1987. The results obtained were summerized as follows : l. Significant difference were observed in nitrate concentration in Italian ryegrass and forage corn when nitrogen fertilizer were applied(p $lt;0.05). 2. The concentration of nitrate in forage corn seems to be less than that in Italian ryegrass.