not practiced. Table 1 showed DMY distribution of King Napier grass in one year round of 4 different cutting heights with 35 days cutting interval. Figure 1 showed the relation between DMY with air temperature. The DMY of current study was 71,403.1 kg/ha which sufficient for feeding 24 milking cows throughout the year (NRC, 2001). However, the distribution of DMY of Napier grass all year round was fluctuated, either lower or higher than requirement; in the 4 cut, a lower DMY (3,183.3 kg/ha) was obtained, th whereas in the 11 cut an excess DMY (8,176.5 kg/ha) th was obtained for example. Therefore, during the time that DMY was excess or lower than requirement of the cows. The amount of cutting area should be considered for determined the DMY of the grass. Moreover, Wadi et al. (2004) reported that annual Herbage Dry Matter Yield (HDMY) of King Napier grass was higher in the plants at a 90 day interval and 0 cm height than at a 60 day interval and 30 cm cutting height