6f418905-226b-4c87-b10a-a44511487b53 dataset Data infodesk ISRIC - World Soil Information data@isric.org 2021-07-14T11:51:51 ISO 19115:2003/19139 2003/Cor.1:2006 4326 EPSG Africa SoilGrids nutrients - Extractable Manganese (Mn) 2016-12-05 6f418905-226b-4c87-b10a-a44511487b53 Extractable Manganese (Mn) content of the soil fine earth fraction in mg/kg (ppm) as measured according to the soil analytical procedure of Mehlich 3 and spatially predicted for 0-30 cm depth interval at 250 m spatial resolution across sub-Saharan Africa using Machine Learning (ensemble between random forest and gradient boosting) using soil data from the Africa Soil Profiles database (AfSP) compiled by AfSIS and recent soil data newly collected by AfSIS in partnership with EthioSIS (Ethiopia), GhaSIS (Ghana) and NiSIS (Nigeria as made possible by OCP Africa and IITA), combined with soil data as made available by Wageningen University and Research, IFDC, VitalSigns, University of California and the OneAcreFund. [Values M = mean value predicted]. For details see below for peer reviewed paper (T. Hengl, J.G.B. Leenaars, K.D. Shepherd, M.G. Walsh, G.B.M. Heuvelink, Tekalign Mamo, H. Tilahun, E. Berkhout, M. Cooper, E. Fegraus, I. Wheeler, N.A. Kwabena, 2017. Soil nutrient maps of Sub-Saharan Africa: assessment of soil nutrient content at 250 m spatial resolution using machine learning. Nutriënt Cycling in Agroecosystems 109(1): 77-102). Maps produced for the Environmental Assessment Agency (PBL), funded by the Netherlands government, in collaboration with the AfSIS and the Vital Signs projects. Johan Leenaars ISRIC - World Soil Information Senior soil scientist PO Box 353 Wageningen 6700AJ Netherlands johan.leenaars@wur.nl Tom Hengl ISRIC - World Soil Information Former staff PO Box 353 Wageningen 6700AJ Netherlands None https://maps.isric.org/mapserv?map=/map/af250m_nutrient.map&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&BBOX=-35,-30,29,56&CRS=EPSG:4326&WIDTH=1426&HEIGHT=895&LAYERS=af250m_nutrient_mn_m_agg30cm&STYLES=&FORMAT=png nutrients manganese digital soil mapping Soil science Stratum Africa Region Open Database License (ODbl) v1.0 250 geoscientificInformation 1980-01-01 2016-12-31 -29.7 55.4 -34.9 28.7 GTiff https://files.isric.org/public/af250m_nutrient/af250m_nutrient_mn_m_agg30cm.tif WWW:DOWNLOAD-1.0-ftp--download Download GeoTIFF at depth 30 cm https://maps.isric.org/mapserv?map=/map/af250m_nutrient.map OGC:WMS af250m_nutrient_mn_m_agg30cm https://isric.org/projects/africa-soilgrids-soil-nutrient-maps-sub-saharan-africa-250-m-resolution WWW:LINK-1.0-http--related Project webpage https://link.springer.com/article/10.1007/s10705-017-9870-x WWW:LINK-1.0-http--related Scientific paper Project webpage: http://isric.org/projects/africa-soilgrids-soil-nutrient-maps-sub-saharan-africa-250-m-resolution Soil data (1): http://isric.org/projects/africa-soil-profiles-database-afsp Soil data (2): http://africasoils.net/services/data/soil-databases/