URI: http://w3id.org/glosis/model/procedure/pHProcedure-pHH2O_unkn-spec
Code list for pH analysis procedures - codelist scheme
Spectrally measured and converted to pHH2O (soil reaction) in unknown soil/water solution
pHH2O_unkn-spec
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.