1. International Livestock Research Institute, ilri.org, P.O. Box 30709, Nairobi, Kenya
2. Communication and Innovation Studies Group, Wageningen University, P.O. Box 8130, 6700 EW Wageningen, The Netherlands
3. Centre for Crop Systems Analysis, Wageningen University, P.O. Box 430, 6700 AK Wageningen, The Netherlands
4. International Crop Research Institute for the Semi-arid Tropics (ICRISAT), Patancheru 502324, Telangana, India
5. Via delle Begonie 2, 63100 Ascoli Piceno, Italy