Articles | Volume 10, issue 1
https://doi.org/10.5194/soil-10-321-2024
https://doi.org/10.5194/soil-10-321-2024
Original research article
 | 
17 May 2024
Original research article |  | 17 May 2024

The effect of soil moisture content and soil texture on fast in situ pH measurements with two types of robust ion-selective electrodes

Sebastian Vogel, Katja Emmerich, Ingmar Schröter, Eric Bönecke, Wolfgang Schwanghart, Jörg Rühlmann, Eckart Kramer, and Robin Gebbers

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Cited articles

Adamchuk, V. I. and Lund, E. D.: On-The-Go Mapping of Soil pH Using Antimony Electrodes, Paper No. 083995, ASABE Annual International Meeting, 29 June–2 July 2008, Rhode Island (USA), https://elibrary.asabe.org/abstract.asp?aid=24748 (last access: 14 May 2024), 2008. 
Adamchuk, V. I., Morgan M. T., and Ess, D. R.: An automated sampling system for measuring soil pH, T. ASAE, 42, 885–891, 1999.  
Baghdady, N. H. and Sommer, K.: Application of an improved antimony micro-electrode for measuring pH-changes at the soil-root interface of maize, J. Plant Nutr. Soil Sci., 153, 323–326, 1990. 
Barron, J. J., Ashton, C., and Geary, L.: The Effects of Temperature on pH Measurement, 57th Annual Meeting of the International Society of Electrochemistry, Edinburgh, UK, https://knowledge.reagecon.com/wp-content/uploads/2019/12/The-Effects-of-Temperature-on-PH-Measurement.pdf (last access: 14 May 2024), 2006. 
Bates, R. G.: Electrodes for pH Measurement, J. Electroanal. Chem., 2, 93–109, 1961. 
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Short summary
To rapidly obtain high-resolution soil pH data, pH sensors can measure the pH value directly in the field under the current soil moisture (SM) conditions. The influence of SM on pH and on its measurement quality was studied. An SM increase causes a maximum pH increase of 1.5 units. With increasing SM, the sensor pH value approached the standard pH value measured in the laboratory. Thus, at high soil moisture, calibration of the sensor pH values to the standard pH value is negligible.