1. Department of Agronomy and Horticulture University of Nebraska Lincoln NE 68583 USA
2. Ethiopian Institute of Agricultural Research B. O. Box 2003 Addis Ababa Ethiopia
3. National Drought Mitigation Center School of Natural Resources University of Nebraska Lincoln NE 68583 USA
4. Feed the Future Sustainable Intensification Innovation Lab Kansas State University Manhattan KS 66506 USA
5. International Maize and Wheat Improvement Center (CIMMYT) ILRI Sholla Campus P. O. Box 5689 Addis Ababa Ethiopia