Acknowledgements
The IITA/SAFGRAD Project is grateful to the Government of Burkina Faso for the support provided for its activities. In particular, the assistance of the Ministry of Higher Education and Scientific Research in providing land and other
facilities at the Kamboins^, Saria, Farako-Ba, Vallee du Kou, and Gampela Stations, and of the Ministry of Agriculture in providing land at Lountoila, Pobe (Djibo) and Gorom-Gorom, is greatly appreciated. The collaboration of the Director of the Institute Burkinabe ...