2006 Annual Report 4d.Progress report. This report documents the research conducted under a trust agreement between ARS and the Ministry of Environment as part of a World Bank project to provide assistance in completion of objectives associated with the parent project 1265-13610-026-00D, "INTEGRATING REMOTE SENSING, CLIMATE AND HYDROLOGY FOR EVALUATING WATER, ENERGY AND CARBON CYCLES." Soil carbon sequestration in the semi-arid grasslands of Central Asia has not been adequately evaluated. This research project is conducted in collaboration with the Ministry of Environment in Kazakhstan and ARS provided a roadmap for soil and vegetation sampling techniques for data acquisition. Initial plans were developed for simulation of soil carbon sequestration for the various landuse types in north-central region of Kazkahstan. The model evaluated in Kazakhstan will be used for applications other regions in central Asia.