Evidence map›Paper›PMID 42768769›Full record

SynthesisGlobal change biology2026

Old Soil Organic Matter Has a Low Carbon:Nitrogen Ratio-A Global Meta-Analysis About

Marie Spohn

Abstract readMeta-Analysis
In one paragraph

Synthesis in Global change biology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author.

Marie SpohnDepartment of Soil and Environment, Swedish University of Agricultural Sciences (SLU), Uppsala, Sweden.ORCID https://orcid.org/0000-0002-1010-7317

Funding

European Research Council 101043387
6 · The paper itself

Abstract

Soil organic matter (SOM) persistence and the SOM carbon-to-nitrogen (C:N) ratio determine long-term nitrogen (N) sequestration in terrestrial ecosystems. Yet, the question of how SOM persistence is related to the C:N ratio of SOM is still not fully resolved. Based on a global dataset on Δ

Indexed as

CarbonNitrogenSoilCarbon IsotopesCarbon RadioisotopesEcosystemCarbonCarbon IsotopesCarbon RadioisotopesNitrogenSoil14Ccarbon:nitrogen ratioelement cyclingland coverpersistenceradiocarbonsoil C:N ratiosoil depthsoil organic mattersoil stoichiometry

Identifiers

PMID42768769
PMCPMC13594686

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.