The organic carbon‐to‐clay ratio as an indicator of soil structure vulnerability, a metric focused on the condition of soil structure
The soil organic carbon to clay ratio (SOC:clay) is a metric used in soil quality management. In Switzerland and the United Kingdom, for example, threshold values for SOC:clay ratios have been determined to indicate very good (>1:8) to degraded (
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| Veröffentlicht in: | Soil use and management 2024-04, Vol.40 (2), p.n/a |
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| container_title | Soil use and management |
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| creator | Sauzet, Ophélie Johannes, Alice Deluz, Cédric Dupla, Xavier Matter, Adrien Baveye, Philippe C. Boivin, Pascal |
| description | The soil organic carbon to clay ratio (SOC:clay) is a metric used in soil quality management. In Switzerland and the United Kingdom, for example, threshold values for SOC:clay ratios have been determined to indicate very good (>1:8) to degraded ( |
| doi_str_mv | 10.1111/sum.13060 |
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In Switzerland and the United Kingdom, for example, threshold values for SOC:clay ratios have been determined to indicate very good (>1:8) to degraded (<1:13) soil structures. A recent article in Soil Use and Management by Poeplau and Don, however, suggested that this metric is ‘strongly biased and misleading’, based on their observation that German sandy soils and heavy clay soils tend to show very high and very low SOC:clay ratios, respectively. An alternative metric was proposed based on the ratio of actual SOC to expected SOC level for a considered area. We offer a commentary on the proposal, arguing that because soil structure quality is overlooked by the approach, it fails to provide appropriate SOC levels for soil health and could lead to soils with highly depleted SOC being classified ‘good’. The SOC:clay ratio, on the other hand, does address soil structure condition, providing a structure vulnerability index, a key function independent of local soil management conditions. When soils are found to have high structure vulnerability, as indicated by the SOC:clay ratio, the cropping practices at the site should be investigated and ways to increase the SOC content considered. Structure condition threshold values may only need to be reassessed if it is shown that the average structure quality observed is not in conformity with the present thresholds, which would be expected for some soils, such as Andosols.</description><identifier>ISSN: 0266-0032</identifier><identifier>EISSN: 1475-2743</identifier><identifier>DOI: 10.1111/sum.13060</identifier><language>eng</language><publisher>Bedfordshire: Wiley Subscription Services, Inc</publisher><subject>Clay ; clay content ; Clay soils ; Organic carbon ; Organic soils ; Quality management ; Sandy soils ; Soil ; Soil management ; soil organic carbon ; Soil quality ; Soil structure ; structure quality ; structure vulnerability ; Structure-function relationships</subject><ispartof>Soil use and management, 2024-04, Vol.40 (2), p.n/a</ispartof><rights>2024 The Authors. published by John Wiley & Sons Ltd on behalf of British Society of Soil Science.</rights><rights>2024. 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In Switzerland and the United Kingdom, for example, threshold values for SOC:clay ratios have been determined to indicate very good (>1:8) to degraded (<1:13) soil structures. A recent article in Soil Use and Management by Poeplau and Don, however, suggested that this metric is ‘strongly biased and misleading’, based on their observation that German sandy soils and heavy clay soils tend to show very high and very low SOC:clay ratios, respectively. An alternative metric was proposed based on the ratio of actual SOC to expected SOC level for a considered area. We offer a commentary on the proposal, arguing that because soil structure quality is overlooked by the approach, it fails to provide appropriate SOC levels for soil health and could lead to soils with highly depleted SOC being classified ‘good’. The SOC:clay ratio, on the other hand, does address soil structure condition, providing a structure vulnerability index, a key function independent of local soil management conditions. When soils are found to have high structure vulnerability, as indicated by the SOC:clay ratio, the cropping practices at the site should be investigated and ways to increase the SOC content considered. Structure condition threshold values may only need to be reassessed if it is shown that the average structure quality observed is not in conformity with the present thresholds, which would be expected for some soils, such as Andosols.</description><subject>Clay</subject><subject>clay content</subject><subject>Clay soils</subject><subject>Organic carbon</subject><subject>Organic soils</subject><subject>Quality management</subject><subject>Sandy soils</subject><subject>Soil</subject><subject>Soil management</subject><subject>soil organic carbon</subject><subject>Soil quality</subject><subject>Soil structure</subject><subject>structure quality</subject><subject>structure vulnerability</subject><subject>Structure-function relationships</subject><issn>0266-0032</issn><issn>1475-2743</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><sourceid>WIN</sourceid><recordid>eNp1kLtOAzEQRS0EEiFQ8AeWqJDYxI99eEuEeElBFCS1NfHa4GizDrYXtB0tHd_Il2AIHWKKmebMudJF6JiSCU0zDf16QjkpyQ4a0bwqMlblfBeNCCvLjBDO9tFBCCtCGK1KMkLv8yeNnX-EziqswC9d9_n2EV1aqoUBe4jWYQgYOmy7xiqIzmNncHC2xSH6XsXea_zSt532sLStjcMZBrzW0SelcaoPusGuwzElKZccydj9VRyiPQNt0Ee_d4wWV5fzi5tsdn99e3E-yxSrGcmKOjdVTUAAGCiEYbkRvBG1YlDnAoQoasqbshCk4EyVjWFC8KIymi1TLVzxMTrZejfePfc6RLlyve9SpOSkyinjOa0TdbqllHcheG3kxts1-EFSIr-blqlp-dN0Yqdb9tW2evgflA-Lu-3HF9X6gzg</recordid><startdate>202404</startdate><enddate>202404</enddate><creator>Sauzet, Ophélie</creator><creator>Johannes, Alice</creator><creator>Deluz, Cédric</creator><creator>Dupla, Xavier</creator><creator>Matter, Adrien</creator><creator>Baveye, Philippe C.</creator><creator>Boivin, Pascal</creator><general>Wiley Subscription Services, Inc</general><scope>24P</scope><scope>WIN</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7UA</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H96</scope><scope>KR7</scope><scope>L.G</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0002-9927-8963</orcidid><orcidid>https://orcid.org/0000-0002-8432-6141</orcidid><orcidid>https://orcid.org/0000-0002-3181-052X</orcidid></search><sort><creationdate>202404</creationdate><title>The organic carbon‐to‐clay ratio as an indicator of soil structure vulnerability, a metric focused on the condition of soil structure</title><author>Sauzet, Ophélie ; 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When soils are found to have high structure vulnerability, as indicated by the SOC:clay ratio, the cropping practices at the site should be investigated and ways to increase the SOC content considered. Structure condition threshold values may only need to be reassessed if it is shown that the average structure quality observed is not in conformity with the present thresholds, which would be expected for some soils, such as Andosols.</abstract><cop>Bedfordshire</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1111/sum.13060</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0002-9927-8963</orcidid><orcidid>https://orcid.org/0000-0002-8432-6141</orcidid><orcidid>https://orcid.org/0000-0002-3181-052X</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Clay clay content Clay soils Organic carbon Organic soils Quality management Sandy soils Soil Soil management soil organic carbon Soil quality Soil structure structure quality structure vulnerability Structure-function relationships |
| title | The organic carbon‐to‐clay ratio as an indicator of soil structure vulnerability, a metric focused on the condition of soil structure |
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