n4:isric_report_2014_01.pdfLeenaars J.G.B., A.J.M. van Oostrum and M. Ruiperez Gonzalez, 2014. Africa Soil Profiles Database, Version 1.2. A compilation of georeferenced and standardised legacy soil profile data for Sub-Saharan Africa (with dataset). ISRIC Report 2014/01. Africa Soil Information Service (AfSIS) project and ISRIC - World Soil Information, Wageningen, the Netherlands. See Annex 4.
Fine earth. Excavation and replacement (i.e. soils too fragile to remove a stable sample) e.g. by auger, at unknown humidity, corrected for coarse fragments if any