Processes.- Desertification: an appeal for a broader perspective.- Sress, disturbance and change in rangeland ecosystems.- Viewing rangelands as landscape systems.- Hydrologic effects on rangeland degradation and restoration processes.- Erosion models: use and misuse on rangelands.- Desert rangelands, degradation and nutrients.- Assessing and monitoring desertification with soil indicators.- Scaling up from field measurements to large areas using the Desertification Response Unit and Indicator Approaches.- Agricultural and ecological perspectives of vegetation dynamics and desertification.- Policy.- The United Nations data bases on desertification.- The implementation of soil conservation programmes.- Evolution of rangeland conservation strategies.- Policy and law for rangeland conservation.- Rangelands issues and trends in developing countries.- The United Nations Convention to Combat Desertification: constraints to implementation in Eastern Africa.