photosynthetic part and the storage carbohydrate in the subterranean stem of stubble tillers. Consequently, the tillers might be died and the new ones grew instead from the lateral bud. So, the initials of plant regrowth were lower than the higher level of above ground cutting. However, these findings of the current study are inconsistent with Santana et al. (1989) studied the interaction between frequency and cutting height of 3 cultivars of Napier grass and concluded that the higher productivity was combining with cut to the ground at an 8 week interval. It can explain that the low level of cutting may loose more photosynthetic part and use more time for regrowth than the high level of cutting (Walton, 1984). In addition to Thinnakorn et al. (1995) who worked at Pakchong district, Thailand, whereas the soil was quite high fertility. They found that cutting at 5, 10 and 15-cm height at 30-35 days of cutting interval were no significant effects on average 2 year of DMY which obtained 12.00, 13.08 and 12.53 t/ha/year, respectively. It is noted that DMY of work done by Thinnakorn et al. (1995) was quite low compare with the current study