Topsoil organic carbon maps of the United Republic of Tanzania
The project ‘Development of a soil carbon map based on NAFORMA and non-NAFORMA datasets for the United Republic of Tanzania’ aimed to map the organic carbon content of the Tanzanian topsoil in support of the UN-REDD programme in Tanzania and the National Forest Resources Management and Assessment (NAFORMA). The project was Norwegian funded and technical support was provided by the FAO. The project was carried in a collaborative effort with the Tanzania Forest Services Agency (Ministry of Natural Resources and Tourism), Sokoine University of Agriculture, ARI Mlingano (Ministry of Agriculture and Food Security and Cooperatives), Department of Forest and Non-Renewable Natural Resources (Ministry of Agriculture and Natural Resources Zanzibar) and African Soil Information Service (AfSIS).
Target depths for mapping were 0-10 cm, 10-20 cm, 20-30 cm, and 0-30 cm. The soil point dataset, with over 3,200 observations of soil organic carbon content, used was the most comprehensive dataset collected in Tanzania so far. In addition, a total of 37 environmental data layers were used as covariates. The soil organic carbon content was predicted with regression-kriging at 250 m and 1000 m spatial resolution.