{"type": "FeatureCollection", "features": [{"id": "10.1016/j.geoderma.2024.117154", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:15:51Z", "type": "Journal Article", "created": "2024-12-26", "title": "Separating fast from slow cycling soil organic carbon \u2013 A multi-method comparison on land use change sites", "description": "Soil organic carbon (SOC) is significantly affected by land use change (LUC). Consequently, LUC is a major controlling factor of total SOC contents and SOC pool dynamics. Several methods have been developed to assess distinct SOC pools, which includes particle size separation, thermal analysis and soil reflectance mid-infrared spectroscopy. All of which are considered to have a potential as high through put methods to generate large datasets. Here, we used 23 sites covering six different types of LUC to assess differences in fast and slow cycling SOC derived from three approaches. We used i) particle size fractionation to obtain coarse (>50\u00a0\u00a0\u00b5m) and fine (<50\u00a0\u00a0\u00b5m) SOC fractions; ii) thermal Rock-Eval\u00ae 6 analysis in compilation with the PARTYSOCv2.0EU model to estimate active and stable SOC pools and iii) mid-infrared spectroscopy to determine the relative SOC composition and derive fast (aliphatic compounds) and slow (aromatic/carboxylic compounds) cycling SOC pools. The particle size SOC fractions and thermal SOC pools showed similar dynamics but differed substantially in the magnitude with LUC. The fine SOC fraction contained around two-thirds of the total SOC across all land uses and was strongly responsive by nearly matching the relative changes of total SOC (slope of 0.76 and R2\u00a0=\u00a00.91). Therefore, the fine fraction SOC might be more dynamic than considered until now. In comparison, the stable SOC pool calculated using PARTYSOCv2.0EU was less responsive to the relative changes (slope of 0.43 and R2\u00a0=\u00a00.72) and contained around 40\u00a0% of the total SOC. This underlines that both physical and thermal approaches separate biogeochemically distinct pools. The qualitative assessment by mid-infrared spectroscopy related well to the thermal SOC pools but not to the particle size fractions. The initial land-use SOC composition, as a ratio of the corresponding fast and slow cycling SOC pool, can be a suitable predictor for SOC evolution. This was particularly true for thermal and mid-infrared spectroscopy derived SOC pools. We show that three conceptually different methods (physical, thermal and mid-infrared spectroscopic) are suitable to determine SOC pool changes for a large diversity of LUC, but the sensitivity of the individual pools can differ strongly, depending on the method.", "keywords": ["Particle size fractionation", "Science", "Q", "Rock-Eval\u00ae analysis", "Cropland", "Forest", "Grassland", "Mid-infrared spectroscopy"], "contacts": [{"organization": "Schiedung, Marcus, Barr\u00b4e, Pierre, Peoplau, Christopher,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.geoderma.2024.117154"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geoderma", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.geoderma.2024.117154", "name": "item", "description": "10.1016/j.geoderma.2024.117154", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.geoderma.2024.117154"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-01-01T00:00:00Z"}}, {"id": "10.1016/j.foreco.2007.10.027", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:15:43Z", "type": "Journal Article", "created": "2007-12-06", "title": "Pairwise Comparison Of Soil Organic Particle-Size Distributions In Native Savannas And Eucalyptus Plantations In Congo", "description": "Abstract   Conversion of native vegetation into fast-growing tree plantations is known to affect soil organic matter (SOM): soil carbon (C) and nitrogen (N) content and their distribution in particle-size fractions can be modified in various ways depending on numerous factors, such as soil properties, SOM levels prior to conversion, climatic conditions, silvicultural practices and fire occurrence. Since 1978, 43,000\u00a0ha of clonal eucalyptus plantations have been established on sandy coastal plains under savannas near Pointe-Noire, Congo. We investigated the effects of afforestation on topsoil (0\u201310\u00a0cm) C and N through the analysis of their distribution in particle-size fractions using a pairwise experimental design that compared adjacent savannas and plantations. The studied plantations were of different ages (2\u201330-year-old stands) and differently affected by accidental fires. No significant difference in total topsoil C, N or C/N was observed between young plantations and savanna. In old plantations that had not been affected by fire, total topsoil C content was twice as high as in savanna (   p  =  0.0016   ), on average, mostly involving fractions    >   50\u00a0    \u03bc    m. By contrast, total topsoil N did not differ significantly at these sites. In old plantations affected by fire, total topsoil C content did not differ significantly from that in savanna, but total topsoil N was 26    %    lower in plantations than in savanna (   p  =  0.0063   ), on average, and the decrease affected fractions       200\u00a0    \u03bc    m especially. Whatever the fire occurrence, total topsoil C/N was higher in old plantations than in savanna, in fractions    >   20\u00a0    \u03bc    m especially.", "keywords": ["[SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture", "http://aims.fao.org/aos/agrovoc/c_7190", "SAVANNA", "SOIL ORGANIC MATTER", "FIRE", "analyse de sol", "FLUX ET STOCKS C", "http://aims.fao.org/aos/agrovoc/c_35657", "azote", "2. Zero hunger", "Eucalyptus", "FRACTIONATION", "fraction du sol", "forestry", "FIRE", "04 agricultural and veterinary sciences", "eucalyptus", "META ANALYSIS", "TURNOVER", "[SDV.SA.SF] Life Sciences [q-bio]/Agricultural sciences/Silviculture", " forestry", "plantations", "particle size fractionation", "http://aims.fao.org/aos/agrovoc/c_5990", "fire", "mati\u00e8re organique du sol", "http://aims.fao.org/aos/agrovoc/c_2683", "P33 - Chimie et physique du sol", "570", "PARTICLE-SIZE FRACTIONATION", "http://aims.fao.org/aos/agrovoc/c_24420", "MATTER DYNAMICS", "http://aims.fao.org/aos/agrovoc/c_5192", "TROPICAL SOILS", "LITTER DECOMPOSITION", "soil organic matter", "MANAGEMENT", "EUCALYPTUS", "savane", "http://aims.fao.org/aos/agrovoc/c_1301", "PINUS", "CHANGEMENT D'USAGE DES TERRES", "CARBON DYNAMICS", "http://aims.fao.org/aos/agrovoc/c_1811", "15. Life on land", "savanna", "K10 - Production foresti\u00e8re", "AFFORESTATION", "http://aims.fao.org/aos/agrovoc/c_6825", "0401 agriculture", " forestry", " and fisheries", "carbone", "impact sur l'environnement", "http://aims.fao.org/aos/agrovoc/c_7198"]}, "links": [{"href": "https://doi.org/10.1016/j.foreco.2007.10.027"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Forest%20Ecology%20and%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.foreco.2007.10.027", "name": "item", "description": "10.1016/j.foreco.2007.10.027", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.foreco.2007.10.027"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-03-01T00:00:00Z"}}, {"id": "10.1016/j.still.2006.07.009", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:16:20Z", "type": "Journal Article", "created": "2006-09-08", "title": "Storage And Forms Of Organic Carbon In A No-Tillage Under Cover Crops System On Clayey Oxisol In Dryland Rice Production (Cerrados, Brazil)", "description": "The management and enhancement of soil organic carbon (SOC) is very important for agriculture (fertility) as well as for the environment (carbon (C) sequestration). Consequently, changes in soil management may alter SOC content. No-tillage (NT) practices are potential ways to increase SOC. We studied the SOC from agricultural soils in the Cerrados in Central Brazil. We compared two different tillage systems: conservation agriculture with no-tillage under cover crops (NT) and disc tillage (DT) for 5 years in a context of rainfed rice production. The soil is a dark red oxisol with high clay content (about 40%). The objectives of the study were: (i) to evaluate the short-term (5 years) impact of tillage systems on SOC stocks in an oxisol and (ii) to better understand the dynamics of SOC in different fractions of this soil. We first studied the initial situation in 1998, and compared it to the 2003 situation. NT with cover crop (Crotalaria) was found to increase the storage of C in the topsoil layer (0-10 cm) compared to DT. The difference observed for the 0-10 cm layer under NT in comparison with DT represented C enrichment under no-tillage amounting to 0.35 Mg C ha-1 year-1 and corresponding to less than 10% of cover crops residues returned to the soil. A particle-size fractionation of soil organic matter (SOM) showed that differences in total SOC between NT and DT mainly affected the 0-2 \u00b5m fraction and, to a smaller extent the 2-20 \u00b5m fraction. This specific enrichment of SOC in the silt and clay fraction was attributed to (i) the storage of a water soluble C in the field and (ii) the effect of soil biota and especially fauna activity. The mean residence time of carbon associated with the fine fractions being rather long, it might be assumed that the preferential storage in fine fractions resulted in a long-term carbon storage. This study suggests a positive short-term effect of a no-tillage system on C sequestration in an oxisol. \u00a9 2006 Elsevier B.V. All rights reserved", "keywords": ["P33 - Chimie et physique du sol", "http://aims.fao.org/aos/agrovoc/c_2858", "Oryza sativa", "fractionnement", "[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study", "SOIL ORGANIC CARBON", "01 natural sciences", "630", "CERRADOS", "PARTICLE-SIZE FRACTIONATION OF SOM", "CARBON SEQUESTRATION", "culture sous couvert v\u00e9g\u00e9tal", "no tillage", "OXISOL", "ferralsol", "http://aims.fao.org/aos/agrovoc/c_1301", "[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study", "http://aims.fao.org/aos/agrovoc/c_8511", "http://aims.fao.org/aos/agrovoc/c_35657", "0105 earth and related environmental sciences", "F07 - Fa\u00e7ons culturales", "2. Zero hunger", "Cerrados", "http://aims.fao.org/aos/agrovoc/c_1977", "non-travail du sol", "04 agricultural and veterinary sciences", "15. Life on land", "carbon sequestration", "http://aims.fao.org/aos/agrovoc/c_331583", "particle size fractionation of SOM", "s\u00e9questration du carbone", "http://aims.fao.org/aos/agrovoc/c_3074", "oxisol", "http://aims.fao.org/aos/agrovoc/c_1070", "13. Climate action", "http://aims.fao.org/aos/agrovoc/c_25706", "http://aims.fao.org/aos/agrovoc/c_5438", "0401 agriculture", " forestry", " and fisheries", "NO-TILLAGE", "Crotalaria", "carbone", "Brazil", "RIZ", "mati\u00e8re organique du sol"]}, "links": [{"href": "https://doi.org/10.1016/j.still.2006.07.009"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20and%20Tillage%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.still.2006.07.009", "name": "item", "description": "10.1016/j.still.2006.07.009", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.still.2006.07.009"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-05-01T00:00:00Z"}}, {"id": "10.5281/zenodo.16412421", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:20:59Z", "type": "Journal Article", "created": "2024-12-26", "title": "Separating fast from slow cycling soil organic carbon \u2013 A multi-method comparison on land use change sites", "description": "Soil organic carbon (SOC) is significantly affected by land use change (LUC). Consequently, LUC is a major controlling factor of total SOC contents and SOC pool dynamics. Several methods have been developed to assess distinct SOC pools, which includes particle size separation, thermal analysis and soil reflectance mid-infrared spectroscopy. All of which are considered to have a potential as high through put methods to generate large datasets. Here, we used 23 sites covering six different types of LUC to assess differences in fast and slow cycling SOC derived from three approaches. We used i) particle size fractionation to obtain coarse (>50\u00a0\u00a0\u00b5m) and fine (<50\u00a0\u00a0\u00b5m) SOC fractions; ii) thermal Rock-Eval\u00ae 6 analysis in compilation with the PARTYSOCv2.0EU model to estimate active and stable SOC pools and iii) mid-infrared spectroscopy to determine the relative SOC composition and derive fast (aliphatic compounds) and slow (aromatic/carboxylic compounds) cycling SOC pools. The particle size SOC fractions and thermal SOC pools showed similar dynamics but differed substantially in the magnitude with LUC. The fine SOC fraction contained around two-thirds of the total SOC across all land uses and was strongly responsive by nearly matching the relative changes of total SOC (slope of 0.76 and R2\u00a0=\u00a00.91). Therefore, the fine fraction SOC might be more dynamic than considered until now. In comparison, the stable SOC pool calculated using PARTYSOCv2.0EU was less responsive to the relative changes (slope of 0.43 and R2\u00a0=\u00a00.72) and contained around 40\u00a0% of the total SOC. This underlines that both physical and thermal approaches separate biogeochemically distinct pools. The qualitative assessment by mid-infrared spectroscopy related well to the thermal SOC pools but not to the particle size fractions. The initial land-use SOC composition, as a ratio of the corresponding fast and slow cycling SOC pool, can be a suitable predictor for SOC evolution. This was particularly true for thermal and mid-infrared spectroscopy derived SOC pools. We show that three conceptually different methods (physical, thermal and mid-infrared spectroscopic) are suitable to determine SOC pool changes for a large diversity of LUC, but the sensitivity of the individual pools can differ strongly, depending on the method.", "keywords": ["Particle size fractionation", "Science", "Q", "Rock-Eval\u00ae analysis", "Cropland", "Forest", "Grassland", "Mid-infrared spectroscopy"]}, "links": [{"href": "https://doi.org/10.5281/zenodo.16412421"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geoderma", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.16412421", "name": "item", "description": "10.5281/zenodo.16412421", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.16412421"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-01-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=particle+size+fractionation&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=particle+size+fractionation&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=particle+size+fractionation&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=particle+size+fractionation&offset=4", "hreflang": "en-US"}], "numberMatched": 4, "numberReturned": 4, "distributedFeatures": [], "timeStamp": "2026-09-22T03:57:57.224738Z"}