"Exch bases (Ca, Mg, K, Na) unbuffered, in 1 M NH4Cl (0.05-1.0 m?)" . "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." . "ExchBases_ph0-nh4cl" . . . . . "ExchBases_ph0-nh4cl"@en . .