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Articles | Volume 12, issue 1
Articles | Volume 12, issue 1
https://doi.org/10.5194/soil-12-619-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/soil-12-619-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 12, issue 1
Original research article
 | 
13 May 2026
Original research article |  | 13 May 2026

Estimating soil carbon sequestration potential with mid-IR spectroscopy and explainable machine learning

Yang Hu and Raphael A. Viscarra Rossel

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Short summary
We analysed 482 Australian topsoils to estimate mineral-associated organic carbon (MAOC) and the carbon storage deficit (Cdef). Using mid-infrared spectra with explainable machine learning, we predicted MAOC (R2=0.86) and Cdef (R2=0.89). Model interpretation revealed signals from organic matter and clay minerals were most significant in predicting MAOC and Cdef. Our work provides an accurate, cost-effective means to assess and better understand the drivers of soil carbon sequestration potential.
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