1. Department of Plant Sciences University of Zambia Lusaka Zambia
2. Department of Plant Sciences North Dakota State University Fargo North Dakota USA
3. Estacao Agraria de Chokwe Instituto de Investigação Agraárias de Moçzambique (IIAM) Maputo Mozambique
4. Department of Agronomy and Horticulture University of Nebraska, Panhandle Research, Extension and Education Center Scottsbluff Nebraska USA
5. Misamfu Research Station Zambia Agricultural Research Institute Misamfu Zambia
6. Chitedze Agricultural Research Station Department of Agricultural Research and Technical Services (DARTS) Lilongwe Malawi