Examines research in 4 semi-arid areas: Diourbel Region (Senegal), Maradi Department (Niger), the Kano hinterland (northern Nigeria) and Makueni District (Kenya). Presentation of main results of the research, presentation by country coordinators on farmer investments, plenary discussions, reports of working groups, concluding plenary. The foci include livelihood transformations, the impact of population growth, access to land and markets, how to initiate and sustain participatory debates on national policy formulation.