{"type": "FeatureCollection", "features": [{"id": "10.1016/j.orggeochem.2014.05.001", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:16:44Z", "type": "Journal Article", "created": "2014-05-13", "title": "Fate Of Biochar In Chemically- And Physically-Defined Soil Organic Carbon Pools", "description": "Open AccessThe authors acknowledge all the assistance of AgResearch, Grasslands Research Centre, Palmerston North, New Zealand. The valuable suggestions of R. Gentile as well as the technical assistance of B. Toes, T. Maruyama, M. Vazquez and A. Singh are also appreciated. H.M.S.K.H. was funded by the New Zealand Biochar Research Centre, under the Massey University Doctoral Scholarship Programme. Financial support was covered by the Ministry of Agriculture and Forestry, New Zealand and the New Zealand Agricultural Greenhouse gas Research Centre.", "keywords": ["2. Zero hunger", "Biochar", "4. Education", "0401 agriculture", " forestry", " and fisheries", "Microaggregates", "Clays", "Fractionation", "04 agricultural and veterinary sciences", "Corn stover", "15. Life on land", "Particulate organic matter (POM)", "Silt"]}, "links": [{"href": "https://doi.org/10.1016/j.orggeochem.2014.05.001"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Organic%20Geochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.orggeochem.2014.05.001", "name": "item", "description": "10.1016/j.orggeochem.2014.05.001", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.orggeochem.2014.05.001"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-08-01T00:00:00Z"}}, {"id": "10.1016/j.still.2006.08.006", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:17:12Z", "type": "Journal Article", "created": "2006-09-27", "title": "Long-Term Impact Of Reduced Tillage And Residue Management On Soil Carbon Stabilization: Implications For Conservation Agriculture On Contrasting Soils", "description": "Residue retention and reduced tillage are both conservation agricultural management options that may enhance soil organic carbon (SOC) stabilization in tropical soils. Therefore, we evaluated the effects of long-term tillage and residue management on SOC dynamics in a Chromic Luvisol (red clay soil) and Areni-Gleyic Luvisol (sandy soil) in Zimbabwe. At the time of sampling the soils had been under conventional tillage (CT), mulch ripping (MR), clean ripping (CR) and tied ridging (TR) for 9 years. Soil was fully dispersed and separated into 212\u20132000 mm (coarse sand), 53\u2013212 mm (fine sand), 20\u201353 mm (coarse silt), 5\u201320 mm (fine silt) and 0\u20135 mm (clay) size fractions. The whole soil and size fractions were analyzed for C content. Conventional tillage treatments had the least amount of SOC, with 14.9 mg C g \ufffd 1 soil and 4.2 mg C g \ufffd 1 soil for the red clay and sandy soils, respectively. The highest SOC content was 6.8 mg C g \ufffd 1 soil in the sandy soil under MR, whereas for the red clay soil, TR had the highest SOC content of 20.4 mg C g \ufffd 1 soil. Organic C in the size fractions increased with decreasing size of the fractions. In both soils, the smallest response to management was observed in the clay size fractions, confirming that this size fraction is the most stable. The coarse sand-size fraction was most responsive to management in the sandy soil where MR had 42% more organic C than CR, suggesting that SOC contents of this fraction are predominantly controlled by amounts of C input. In contrast, the fine sand fraction was the most responsive fraction in the red clay soil with a 66% greater C content in the TR than CT. This result suggests that tillage disturbance is the dominant factor reducing C stabilization in a clayey soil, probably by reducing C stabilization within microaggregates. In conclusion, developing viable conservation agriculture practices to optimize SOC contents and long-term agroecosystem sustainability should prioritize the maintenance of C inputs (e.g. residue retention) to coarse textured soils, but should focus on the reduction of SOC decomposition (e.g. through reduced tillage) in fine textured soils. # 2006 Elsevier B.V. All rights reserved.", "keywords": ["organic-matter dynamics", "Soil management", "Conservation agriculture", "Residue management", "no-tillage", "continuous cultivation", "sudano-sahelian conditions", "loam soil", "Tropical agroecosystems", "Tillage", "Agricultural ecosystems", "conventional-tillage", "Field Scale", "Conservation tillage", "2. Zero hunger", "Tropical zones", "Soil organic matter", "microbial biomass", "Particulate organic matter (pom)", "Soil organic carbon", "04 agricultural and veterinary sciences", "15. Life on land", "6. Clean water", "crop residue", "fractions", "0401 agriculture", " forestry", " and fisheries", "manure application"]}, "links": [{"href": "https://doi.org/10.1016/j.still.2006.08.006"}, {"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.2006.08.006", "name": "item", "description": "10.1016/j.still.2006.08.006", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.still.2006.08.006"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-06-01T00:00:00Z"}}, {"id": "10.2136/sssaj1998.03615995006200050032x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:20:24Z", "type": "Journal Article", "created": "2010-07-27", "title": "Aggregation And Soil Organic Matter Accumulation In Cultivated And Native Grassland Soils", "description": "Abstract<p>Tillage intensity affects soil structure and the loss of soil organic C and N. We hypothesized that no\uffe2\uff80\uff90tillage (NT) and conventional tillage (CT) differentially affect three physically defined particulate organic matter (POM) fractions. A grassland\uffe2\uff80\uff90derived Haplustoll was separated into aggregates by wet sieving. Free light fraction (LF) and intra\uffe2\uff80\uff90aggregate POM (iPOM) were isolated. Natural abundance 13C was measured for whole soil C, free LF C, and iPOM C. The mean residence time of soil C under CT (44 yr) was 1.7 times less than in NT (73 yr). The amount of free LF C was 174, 196, and 474 g C m\uffe2\uff80\uff902 for CT, NT, and NS, respectively. Total iPOM C amounts in CT, NT, and NS were 193, 337, and 503 g C m\uffe2\uff80\uff902, respectively. The level of fine iPOM C (53\uffe2\uff80\uff93250 \uffc2\uffb5m) level in macroaggregates (250\uffe2\uff80\uff932000 \uffc2\uffb5m) obtained after slaking was five times greater in NT vs. CT and accounted for 47.3% of the difference in total POM C between NT and CT. The amount of coarse iPOM C (250\uffe2\uff80\uff932000 \uffc2\uffb5m) was only 2.4 times greater and accounted for only 21% of the difference in total POM C. Sequestration of iPOM was observed in NT vs. CT, but free LF was not influenced by differential tillage. We conclude that differences in aggregate turnover largely control the difference in fine iPOM in CT vs. NT and consequently SOM loss is affected by both the amount of aggregation and aggregate turnover.</p>", "keywords": ["2. Zero hunger", "Soil organic matter", "Soil management", "Conventional tillage", "Particulate organic matter (pom)", "0401 agriculture", " forestry", " and fisheries", "No-till", "04 agricultural and veterinary sciences", "15. Life on land", "Field Scale", "Conservation tillage"]}, "links": [{"href": "https://doi.org/10.2136/sssaj1998.03615995006200050032x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Science%20Society%20of%20America%20Journal", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.2136/sssaj1998.03615995006200050032x", "name": "item", "description": "10.2136/sssaj1998.03615995006200050032x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.2136/sssaj1998.03615995006200050032x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1998-09-01T00:00:00Z"}}, {"id": "10.2136/sssaj2004.1935", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:20:27Z", "type": "Journal Article", "created": "2010-07-27", "description": "<p>Identification of diagnostic soil organic matter (SOM) fractions and the mechanisms controlling their formation and turnover is critical for better understanding of C dynamics in soils. Enhanced microaggregate formation and stabilization of C due to reduced macroaggregate turnover has been proposed as a mechanism promoting C sequestration in no\uffe2\uff80\uff90tillage (NT) compared with conventional tillage (CT) systems in temperate soils dominated by 2:1 clay mineralogy. We evaluated the contribution of macroaggregate\uffe2\uff80\uff90protected microaggregates to total soil organic carbon (SOC) sequestration in NT relative to CT in three soils differing in clay mineralogy: a 2:1 clay\uffe2\uff80\uff90dominated soil (2:1), a soil with mixed clay mineralogy [2:1 and 1:1] and oxides (mixed), and a soil dominated by (1:1) clay minerals and oxides (1:1). Microaggregates (mM) were isolated from macroaggregates from 0\uffe2\uff80\uff90 to 5\uffe2\uff80\uff90 and 5\uffe2\uff80\uff90 to 20\uffe2\uff80\uff90cm soil layers. Particulate organic matter (POM) located within the microaggregates (intra\uffe2\uff80\uff90mM\uffe2\uff80\uff90POM) was separated from POM outside of the microaggregates (inter\uffe2\uff80\uff90mM\uffe2\uff80\uff90POM) and the mineral fraction of the microaggregates (mineral\uffe2\uff80\uff90mM). In all three soils, total SOC as well as microaggregate\uffe2\uff80\uff90associated C (mM\uffe2\uff80\uff90C) was greater with NT compared with CT. Although less than half of the total SOC under NT was associated with the microaggregate fraction, more than 90% of the total difference in SOC between NT and CT was explained by the difference in mM\uffe2\uff80\uff90C in all three soils. Thus, we identified and isolated a fraction that explains almost the entire difference in total SOC between NT and CT across soils characterized by drastically different clay mineralogy.</p>", "keywords": ["Carbon sequestration", "Macroaggregates", "Soil organic matter", "Soil management", "Conventional tillage", "Particulate organic matter (pom)", "Conservation agriculture", "Microaggregates", "No-till", "04 agricultural and veterinary sciences", "15. Life on land", "0401 agriculture", " forestry", " and fisheries", "Field Scale", "Conservation tillage", "Soil organic carbon (soc)"]}, "links": [{"href": "https://doi.org/10.2136/sssaj2004.1935"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Science%20Society%20of%20America%20Journal", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.2136/sssaj2004.1935", "name": "item", "description": "10.2136/sssaj2004.1935", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.2136/sssaj2004.1935"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-11-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Particulate+organic+matter+%28pom%29&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=Particulate+organic+matter+%28pom%29&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=Particulate+organic+matter+%28pom%29&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Particulate+organic+matter+%28pom%29&offset=4", "hreflang": "en-US"}], "numberMatched": 4, "numberReturned": 4, "distributedFeatures": [], "timeStamp": "2026-05-30T09:11:37.291816Z"}