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Articles | Volume 12, issue 1
Articles | Volume 12, issue 1
https://doi.org/10.5194/soil-12-689-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/soil-12-689-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 12, issue 1
Original research article
 | 
03 Jun 2026
Original research article |  | 03 Jun 2026

Operational POM increases are over-interpreted as SOM stabilization:quantifying untransformed straw and biochar residues via magnetic separation

Yuhan Xia, Sen Dou, Song Guan, and Dilimulati Yalihong

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Short summary
Following organic amendment application, increases in particulate organic carbon (POC) are often overinterpreted as evidence of organic matter stabilization or new stable soil organic matter (SOM) formation. In fact, they may merely reflect persistent untransformed exogenous organic residues, especially pronounced in the early experimental phase. This overestimation decreases gradually with incubation time in the straw treatment, but remains stable under biochar amendment.
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