The case studies presented here were carried out by P. Farage, J. Pretty, and A. Ball of the University of Essex (United Kingdom), L. Olsson, Lund University (Sweden), and P. Tschakert of the University of Arizona (United States) in collaboration with A. Warren of University College London (United Kingdom) and have been published in an FAO publication called Carbon Sequestration in Dryland Soils (FAO, 2004b). The information for the Nigerian and Kenyan case studies was supplied by M. Mortimore and M. Tiffen (Drylands Research, Crewkerne, United Kingdom), and the Indian case study used data collected by B. Adolph and J. Butterworth (Natural Resources Institute, Chatham, United Kingdom, in association with the Deccan Development Society, Hyderabad and Pastapur, the BAIF Institute of Rural Development, at Tiptur and Lakihalli, India). Details of the Argentine systems were provided by E.A. Rienzi (Faculty of Agronomy, University of Buenos Aires, Argentina). The Senegal case study is based on the work of P. Tschakert. The University of Edinburgh (United Kingdom) supported the FAO through an academic exchange programme for Dr. Ana Rey at the Land and Plant Nutrition Management Service (AGLL).
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