{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T06:58:28Z","timestamp":1790405908035,"version":"4.1.0"},"reference-count":40,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T00:00:00Z","timestamp":1789948800000},"content-version":"vor","delay-in-days":20,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T00:00:00Z","timestamp":1788220800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100000781","name":"European Research Council","doi-asserted-by":"publisher","award":["101043387"],"award-info":[{"award-number":["101043387"]}],"id":[{"id":"10.13039\/501100000781","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Global Change Biology"],"published-print":{"date-parts":[[2026,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Soil organic matter (SOM) persistence and the SOM carbon\u2010to\u2010nitrogen (C:N) ratio determine long\u2010term 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 \u0394\n                    <jats:sup>14<\/jats:sup>\n                    C in soils, I tested the hypothesis that SOM persistence is negatively correlated with the C:N ratio because N is enriched relative to carbon (C) as SOM ages. The results of this study demonstrate that the soil \u0394\n                    <jats:sup>14<\/jats:sup>\n                    C decreased with decreasing C:N ratio, indicating that old, persistent SOM has a low C:N ratio, as hypothesized. The relationship between \u0394\n                    <jats:sup>14<\/jats:sup>\n                    C and the C:N ratio had a breakpoint at a C:N ratio of approximately 13, indicating that organic matter with a high C:N ratio decomposes quickly, while SOM with a C:N ratio below 13 decomposes substantially more slowly. The \u0394\n                    <jats:sup>14<\/jats:sup>\n                    C was higher in forest and shrubland soils than in grassland and cropland soils throughout the soil profile. High soil \u0394\n                    <jats:sup>14<\/jats:sup>\n                    C values were associated with high soil C:N ratios in topsoil layers of forests and shrublands, suggesting that high inputs of plant detritus with high C:N ratios keep the C:N ratio elevated in the topsoil layers of these ecosystems. In conclusion, this study shows that old SOM has a low C:N ratio, indicating that organic N is preferentially retained in soils compared to organic C. The results have important implications for element cycling and soil C sequestration because they show that N is stored on average for longer periods in soils compared to C and that an increase in the amount of organic C that is sequestered in soils over centuries would strongly increase the amount of sequestered N.\n                  <\/jats:p>","DOI":"10.1111\/gcb.71107","type":"journal-article","created":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T05:50:07Z","timestamp":1790056207000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Old Soil Organic Matter Has a Low Carbon:Nitrogen Ratio\u2014A Global Meta\u2010Analysis About\n                    <scp>\n                      <sup>14<\/sup>\n                      C\n                    <\/scp>\n                    and Soil Stoichiometry"],"prefix":"10.1111","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1010-7317","authenticated-orcid":false,"given":"Marie","family":"Spohn","sequence":"first","affiliation":[{"name":"Department of Soil and Environment Swedish University of Agricultural Sciences (SLU)  Uppsala Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,21]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.geoderma.2022.116026"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/ejss.12114_2"},{"key":"e_1_2_11_4_1","unstructured":"Beem\u2010Miller J. 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