This study is based on the work of Professor M.H.M. Gomaa, Director of the Executive Authority for Land Improvement Projects, Cairo, Egypt.
The study benefited from the contributions of K. Isherwood (FAO Consultant); J. Poulisse and T. van den Bergen (FAO).
The background cover photograph is from the FAO Mediabase FAO/ 23181/C. Shanghua and the other photographs were provided by EcoPort: A. Bozzini (faba bean), S.S. Gassouma (date palm) and K. Heydon (cotton).
