One hectare of the area in Wadi Al-khun has been fenced and plant inventory in the fenced area (Enclosure) was conducted. The enumerations in the fenced area are showed increase in numbers of perennial species such as Merremia hadramautica, Tephrosia nubica and Acacia tortilis while annual or seasonal species as Cenchrus ciliaris, Stipagrostes hirtigluma, Tribulus sp, Dichanthium insculptum .etc, were decreased or disappeared after a few months of the rainy season. Natural regeneration of perennial range species have been increased in their density in particular Merremia hadramautica, Tephrosia nubica. The dry matter of fodder production was 408 kg /ha and 100 kg / ha inside the enclosure and the site beside respectively. The animal grazing capacity was calculated to be one head of goat or sheep / 2 ha and one head of goat or sheep / 7 ha in the enclosure area and outside respectively.