Arid Lands: A Geographical Appraisal

adaptation Africa agricultural alluvial alluvial fans animals annual arid and semi-arid arid areas arid lands arid regions arid zone Arid Zone Research artesian Artesian Basin Australia barchans basins Bedouin breeding Bushmen camels cattle changes Chapter clay climate communities considerable countries crop cultivation cultural deposits desert drainage dunes East economic effects environment ephemerals erosion evaporation evapotranspiration example factors farmers farming fodder forest goats grassland grazing groundwater habitat heat herds humid important improvement increase irrigation lakes land-use landforms layer limited livestock metres moisture natural Negev nomadic northern oases occur pasture perennial Photo plains plant growth population possible precipitation problems production qanat rain rainfall range relation river rocks Sahara saline salt sand season sedentary semi-arid semi-arid lands sheep slope soil South southern Southern Rhodesia species streams Sudan surface temperature tion types Unesco valley vegetation weathering Western Australia wind winter