Introduction / Priscilla Copeland Reining. Some observations on adaptation to semi arid environments / Michael E. Moseley -- Farmers and technical experts : information flow in irrigated agriculture / Susan H. Lees -- Human use of the pre-Saharan ecosystem and its impact on desertization / William H. Bedoian -- Utilization of surface water by Northern Arabian Bedouins / F. S. Vidal -- Agroecosystem diversity : a model from the Sonoran Desert / Richard S. Felger, Gary P. Nabhan -- Rational choice model of agricultural resource utilization and conservation / John W. Bennett -- Drought versus desertification : the case of the Sahel / Sharon E. Nicholson -- Some observations on adaptation to semi arid environments / Priscilla Copeland Reining.
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