Abstract: Nutrient deficiencies (primarily N, P or K) are major limitations to animal production in upland ragnelands of Balochistan. Nonetheless there is little reliable information on mineral concentrations in forage species. We assessed the mineral concentrations in different species of shrubs and perennial and annual grasses from Haxarganji Chiltan National park along with their 13C as a time-integrated estimates of water use efficiency (WUE). The concentration of total N (15 – 30 mg g –1 in foliage) would meet the needs of ruminants in most of the species studied, but was substantially reduced (to below ruminate requirements) by significant concentrations (2-10 mg g–1) of non-protein nitrogen. At the time of sampling (Spring), concentrations of P (1-4 mg g–1) were adequate for grazing animals whereas those k and Mg were not (mostly < 6 mg g–1). Results suggested that in summer, concentrations of the main nutrients would decline further as the plants mature. Concentrations of non-protein nitrogen were related to WUE (δ13C) and reinforce the view that shortage of water reduce the palatability and nutritive value of most forage species in these Balochistan rangelands.