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This paper discusses the centers of origin and diversity for bread wheat; sketches historical patterns in the sources and use of wheat genetic resources in modern plant breeding; identifies and compares indicators of genetic diversity used by social and biological scientists; reviews the relation
Atriplex nummularia has been extensively planted in Northern Africa to combat desertification. However, few studies evaluated the effectiveness of these interventions.
The dry rangelands of West Asia and North Africa are fragile and severely degraded due to low rainfall and mismanagement of natural resources. Rainwater harvesting (RWH) interventions are used to increase soil moisture content, vegetation cover, and productivity.
The Mediterranean region covers about 854 million ha, but only 118 million (or 14 per cent) are suitable for agricultural production.
Mediterranean areas of both southern Europe and North Africa are subject to dramatic changes that will affect the sustainability, quantity, quality, and management of water resources.
The West Asia–North Africa (WANA) region has a land area of 1.7 billion ha, and a population of 600 million. Desertification and soil degradation are severe problems in the region.
The System-wide Program for Collective Action and Property Rights (CAPRi)sponsored an International Conference on Policy and Institutional Options for theManagement of Rangelands in Dry Areas, May 7-11, 2001 in Hammamet, Tunisia.
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