(Extract from the introduction) The Mogambo Irrigation Project (MIP) have suggested that a limited development of the Phase II area could be implemented by the inclusion of the areas of basin soils not developed under Phase I together with the marginal areas of land included in the Phase II area proposed for sprinkler irrigation but capable of economic development by surface irrigation. This note delineates these areas and proposes surface methods of irrigation suitable for these lighter soils with a less uniform topography.