Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 18
Articles | Volume 22, issue 18
https://doi.org/10.5194/bg-22-4679-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-4679-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 18
Research article
 | 
15 Sep 2025
Research article |  | 15 Sep 2025

The incubation history of soil samples strongly affects the occlusion of particulate organic matter

Frederick Büks, Sabine Dumke, and Julia König

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Short summary
Ultrasonication followed by density fractionation is a frequently used method to determine soil structural stability and the amount of occluded particulate organic matter. Our analyses of three soils (sandy, silty and loamy) showed that air drying and gentle rewetting change SOM (soil organic matter) fractions depending on the subsequent time of re-incubation compared to field-fresh samples. This is important, since, e.g., the measurement of archived soils requires the handling of air-dried samples.
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