This work was part of the project on "Development of Soil Fertility Research Capability and Soil Sampling Protocols for Benchmark Soils in Tanzania"A detailed characterization of soils earmarked as "Benchmark Soils of Morogoro District" in Tanzania was carried out to provide basic data required in planning and execution of soil fertility studies in the area. Benchmark soils are defined as those occuring in extensive areas and whose comprehensive characterization could contribute substantially to transfer of agro-technology from one area to another.Canadian International Development Agency (CIDA)