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The causation of the arid zone by F K Hare
Climatic change in arid regions since the Pliocene by K W Butzer
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acres agriculture Amu Darya ancient animals archaeological arid lands arid regions arid zone Asia Baluchistan barley basin belt breeding canals Caspian Sea cattle cent Central century climate cotton crops cultivation culture dams delta deposits desert domestication drought early East economic Egypt erosion especially farmers farming feddans fertile fields flood foggaras forest glacial grazing groundwater Harappa herds humid important increase India Indus Iran Iraq irrigation irrigation system Karoo Lake maize malaria Mediterranean Mesopotamia millennium B.C. moisture mountains natural Neolithic Nile nomadic northern pasture perennial period phase plains plants Pleistocene plough pluvial population Potwar precipitation problem production Punjab rain rainfall Rajasthan range result river Sahara saline salt sand schistosomiasis season semi-arid settlement sheep soil South Africa southern steppes stockbreeding summer supply surface temperature terraces tion trees Tunisia types USSR Valley vegetation veld western wheat wild winter