1. Department of Plant, Soil, and Microbial Sciences, Michigan State University, East Lansing, MI 48824, USA
2. Independent Researcher, 1290 Geneva, Switzerland
3. Center for Biodiversity and Agrosilvopastoral Initiatives, Bougouni BP 68, Mali
4. Agronomy Department, University of Wisconsin-Madison, Madison, WI 53706, USA
5. Laboratoire de Technologie Alimentaire, Institut d’Economie Rurale, Bamako BP 258, Mali
6. Programme Sorgho, Institut d’Economie Rurale, Bamako BP 258, Mali
7. International Crops Research Institute for the Semi-Arid Tropics, Bamako 320, Mali