Articles | Volume 6, issue 2
SOIL, 6, 597–627, 2020
https://doi.org/10.5194/soil-6-597-2020
SOIL, 6, 597–627, 2020
https://doi.org/10.5194/soil-6-597-2020

Original research article 07 Dec 2020

Original research article | 07 Dec 2020

Iron and aluminum association with microbially processed organic matter via meso-density aggregate formation across soils: organo-metallic glue hypothesis

Rota Wagai et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Revision (30 Jul 2020) by Cornelia Rumpel
AR by Rota Wagai on behalf of the Authors (23 Aug 2020)  Author's response    Manuscript
ED: Publish subject to minor revisions (review by editor) (02 Sep 2020) by Cornelia Rumpel
AR by Rota Wagai on behalf of the Authors (03 Sep 2020)  Author's response    Manuscript
ED: Publish subject to technical corrections (22 Sep 2020) by Cornelia Rumpel
ED: Publish subject to technical corrections (26 Sep 2020) by Johan Six(Executive Editor)
AR by Rota Wagai on behalf of the Authors (28 Sep 2020)  Author's response    Manuscript

Post-review adjustments

AA: Author's adjustment | EA: Editor approval
AA by Rota Wagai on behalf of the Authors (02 Nov 2020)   Author's adjustment   Manuscript
EA: Adjustments approved (14 Nov 2020) by Cornelia Rumpel
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Short summary
Global significance of metals (extractable Fe and Al phases) to control organic matter (OM) in recognized. Next key questions include the identification of their localization and mechanism behind OM–metal relationships. Across 23 soils of contrasting mineralogy, Fe and Al phases were mainly associated with microbially processed OM as meso-density microaggregates. OM- and metal-rich nanocomposites with a narrow OM :  metal ratio likely acted as binding agents. A new conceptual model was proposed.