{"type": "FeatureCollection", "features": [{"id": "10.1046/j.1529-8817.2003.00722.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:18:37Z", "type": "Journal Article", "created": "2004-12-24", "title": "Soil Organic Carbon Content And Composition Of 130-Year Crop, Pasture And Forest Land-Use Managements", "description": "Abstract<p>Conversion of former agricultural land to grassland and forest ecosystems is a suggested option for mitigation of increased atmospheric CO2. A Sharpsburg prairie loess soil (fine, smectitic, mesic Typic Argiudoll) provided treatments to study the impact of long\uffe2\uff80\uff90term land use on soil organic carbon (SOC) content and composition for a 130\uffe2\uff80\uff90year\uffe2\uff80\uff90old cropped, pasture and forest comparison. The forest and pasture land use significantly retained more SOC, 46% and 25%, respectively, compared with cropped land use, and forest land use increased soil C content by 29% compared with the pasture. Organic C retained in the soils was a function of the soil N content (r=0.98,P&lt;0.001) and the soil carbohydrate (CH) concentration (r=0.96,P&lt;0.001). Statistical analyses found that soil aggregation processes increased as organic C content increased in the forest and pasture soils, but not in the cropped soil. SOC was composed of similar percentages of CHs (49%, 42% and 51%), amino acids (22%, 15% and 18%), lipids (2.3%, 2.3% and 2.9%) and unidentified C (21%, 29% and 27%), but differed for phenolic acids (PAs) (5.7%, 11.6% and 1.0%) for the pasture, forest and cropped soils, respectively. The results suggested that the majority of the surface soil C sequestered in the long\uffe2\uff80\uff90term pasture and forest soils was identified as C of plant origin through the use of CH and PA biomarkers, although the increase in amino sugar concentration of microbial origin indicates a greater increase in microbial inputs in the three subsoils. The practice of permanent pastures and afforestation of agricultural land showed long\uffe2\uff80\uff90term potential for potential mitigation of atmospheric CO2.</p>", "keywords": ["2. Zero hunger", "amino acids", "550", "Plant Sciences", "carbohydrates", "lignin", "organic C", "04 agricultural and veterinary sciences", "15. Life on land", "630", "6. Clean water", "land-use change", "lipids", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "phenolic acids"], "contacts": [{"organization": "Martens, Dean A., Reedy, Thomas E., Lewis, David T., (retired),", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1046/j.1529-8817.2003.00722.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1046/j.1529-8817.2003.00722.x", "name": "item", "description": "10.1046/j.1529-8817.2003.00722.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1046/j.1529-8817.2003.00722.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2003-12-19T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=phenolic+acids&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=phenolic+acids&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=phenolic+acids&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=phenolic+acids&offset=1", "hreflang": "en-US"}], "numberMatched": 1, "numberReturned": 1, "distributedFeatures": [], "timeStamp": "2026-07-28T08:06:27.653911Z"}