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the claim

Earthworms improve soil water retention.

the verdict
CONTESTED PARTIAL
Recorded sources
1 source for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Earthworms improve soil water retention?

Partly. One review of reclaimed mine soils reports that earthworms increase soil field capacity, while a meta-analysis of invasive earthworms found they significantly decreased soil water content. Both address the claim only partially and in opposite directions.

Verdict: CONTESTED PARTIAL · 1 source for, 1 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 1
Water Retention Potential in Novel Terrestrial Ecosystems Restored on Post-Mine Sites: A Review
2022
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Water Retention Potential in Novel Terrestrial Ecosystems Restored on Post-Mine Sites: A Review. (2022). doi.org. https://doi.org/10.3390/f14010018

Evidence against · 1
Data from Soil chemistry turned upside down: a meta-analysis of invasive earthworm effects on soil chemical properties
2020
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Olga, F., P., T. M., & Alejandra, C. G. (2020). Data from Soil chemistry turned upside down: a meta-analysis of invasive earthworm effects on soil chemical properties. zenodo.org. https://doi.org/10.5061/dryad.59zw3r23d

Receipt History
held for human review18 Oct 2026
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