"ExchAcid_ph7-caoac"@en . . "ExchAcid_ph7-caoac" . . "Exch acidity (H+Al) buffered at pH 7, in 1M Ca-acetate extract" . . "Leenaars 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." . . .