CGIAR - CABI CGIAR - CABI Crop Improvement, Adoption, and Impact of Improved Varieties in Food Crops in Sub-Saharan Africa CGIAR - CABI CGIAR - CABI Crop Improvement, Adoption, and Impact of Improved Varieties in Food Crops in Sub-Saharan Africa Edited by Thomas S. Walker Independent Researcher, Fletcher, North Carolina, USA and Jeffrey Alwang Department of Agricultural and Applied Economics, Virginia Tech, Blacksburg, Virginia, USA Published by CGIAR and CAB International CGIARCABI is a trading name of- CAB CABIInternational CABI CABI Nosworthy Way 38 Chauncy Street Wallingford Suite 1002 Oxfordshire OX10 8DE Boston, MA 02111 UK USA Tel: +44 (0)1491 832111 Tel: +1 800 552 3083 (toll free) Fax: +44 (0)1491 833508 E-mail:
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