{"type": "FeatureCollection", "features": [{"id": "10.1016/j.agee.2013.06.016", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-07-26T16:15:12Z", "type": "Journal Article", "created": "2013-07-25", "title": "Two-Year Simultaneous Records Of N2o And No Fluxes From A Farmed Cropland In The Northern China Plain With A Reduced Nitrogen Addition Rate By One-Third", "description": "Abstract   Given the common problem of fertilizer overuse, agronomists are calling for a reduction of the high nitrogen dose by 1/3. We carried out a field experiment over two full winter wheat\u2013summer maize rotations in the North China Plain (NCP) to determine whether this degree of nitrogen reduction will significantly reduce the emissions of nitrous oxide (N2O) and nitric oxide (NO). Three treatments were investigated in the field trial: a control with no nitrogen application, the conventional practice with nitrogen over-application and the optimal practice with a reduced dose of nitrogen by 1/3. Our observations across all treatments over the experimental period reveal significant correlations of the fluxes of either gas with soil temperature and moisture as well as the concentrations of soil ammonium, nitrate and dissolvable organic carbon. There were strong correlations within the functions of the dual Arrhenius and Michaelis\u2013Menten kinetics, giving apparent activation energy values of 40\u201397 and 59\u201392\u00a0kJ\u00a0mol\u22121 for N2O and NO fluxes, respectively. Our results provide annual direct emission factors of 0.48\u20130.96% for N2O and 0.15\u20130.47% for NO and demonstrate a significant correlation between N2O emission induced by fertilization and fertilizer nitrogen use efficiency (NUE). The correlation indicates a significant potential of N2O mitigation via enhancing NUEs. A reduction in the nitrogen dose did not obviously mitigate either the annual NO emission in both rotations or the annual N2O emission in the second one. However, nitrogen reduction significantly decreased the annual total N2O emission by 38% during the first rotation. These inconsistencies in the responses of N2O emission to the reduced nitrogen dose can be attributed to improper fertilization practices, such as broadcasting urea prior to heavy rainfalls or irrigation events during the maize season, which implies a need for further fertilization practice options/techniques in addition to the reduction of nitrogen doses.", "keywords": ["Michaelis\u00e2\u20ac\u201cMenten kinetics", "2. Zero hunger", "Nitrous oxide (N2O)", "Nitric oxide (NO)", "Nitrogen use efficiency", "13. Climate action", "Arrhenius kinetics", "0401 agriculture", " forestry", " and fisheries", "Direct emission factor", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2013.06.016"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agriculture%2C%20Ecosystems%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agee.2013.06.016", "name": "item", "description": "10.1016/j.agee.2013.06.016", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2013.06.016"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-09-01T00:00:00Z"}}, {"id": "10.5061/dryad.f1b82", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:26Z", "type": "Dataset", "title": "Data from: Nitrogen fertilization challenges the climate benefit of cellulosic biofuels", "description": "unspecifiedCellulosic biofuels are intended to improve future energy and climate  security. Nitrogen (N) fertilizer is commonly recommended to stimulate  yields but can increase losses of the greenhouse gas nitrous oxide (N2O)  and other forms of reactive N, including nitrate. We measured soil N2O  emissions and nitrate leaching along a switchgrass (Panicum virgatum) high  resolution N-fertilizer gradient for three years post-establishment.  Results revealed an exponential increase in annual N2O emissions that each  year became stronger (R 2 > 0.9, P < 0.001) and deviated  further from the fixed percentage assumed for IPCC Tier 1 emission  factors. Concomitantly, switchgrass yields became less responsive each  year to N fertilizer. Nitrate leaching (and calculated indirect N2O  emissions) also increased exponentially in response to N inputs, but  neither methane (CH4) uptake nor soil organic carbon changed detectably.  Overall, N fertilizer inputs at rates greater than crop need curtailed the  climate benefit of ethanol production almost two-fold, from a maximum  mitigation capacity of \u22125.71 \u00b1 0.22 Mg CO2e ha\u22121 yr\u22121 in switchgrass  fertilized at 56 kg N ha\u22121 to only \u22122.97 \u00b1 0.18 Mg CO2e ha\u22121 yr\u22121 in  switchgrass fertilized at 196 kg N ha\u22121. Minimizing N fertilizer use will  be an important strategy for fully realizing the climate benefits of  cellulosic biofuel production.", "keywords": ["2. Zero hunger", "Switchgrass", "Panicum virgatum", "13. Climate action", "nitrate leaching", "IPCC emission factor", "methane (CH4) oxidation", "15. Life on land", "7. Clean energy", "Life cycle analysis", "nitrous oxide (N2O)", "6. Clean water", "nitrogen fertilizer"], "contacts": [{"organization": "Ruan, Leilei, Bhardwaj, Ajay K., Hamilton, Stephen K., Robertson, G. Philip,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.f1b82"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.f1b82", "name": "item", "description": "10.5061/dryad.f1b82", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.f1b82"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-03-28T00:00:00Z"}}, {"id": "10.6078/D1DD85", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-07-26T16:24:13Z", "type": "Dataset", "title": "DayCent simulations for California annual grasslands: Monthly data outputs", "description": "unspecifiedComposted manure and green waste amendments have been shown to increase  net carbon (C) sequestration in rangeland soils and have been proposed as  a means to help lower atmospheric CO2 concentrations. However, the effect  of climate change on soil organic C (SOC) stocks and greenhouse gas  emissions in rangelands is not well understood, and the viability of  climate change mitigation strategies under future conditions is even less  certain. We used a process-based biogeochemical model (DayCent) at a daily  timestep to explore the long-term effects of potential future climate  changes on C and greenhouse gas dynamics in annual grassland ecosystems.  We then used the model to explore how the same ecosystems might respond to  climate change following compost amendments to soils and determined the  long-term viability of net SOC sequestration under changing climates. We  simulated net primary productivity (NPP), SOC, and greenhouse gas fluxes  across seven California annual grasslands with and without compost  amendments. We drove the DayCent simulations with field data and with  site-specific daily climate data from two Earth system models (CanESM2 and  HadGEM-ES) and two representative concentration pathways (RCP4.5 and  RCP8.5) through 2100. Net primary productivity and SOC stocks in unamended  and amended ecosystems were surprisingly insensitive to projected climate  changes. A one-time amendment of compost to rangeland acted as a  slow-release organic fertilizer and increased NPP by up to 390\u2013814 kg C  ha-1 y-1 across sites. The amendment effect on NPP was not sensitive to  Earth system model or emissions scenario and endured through the end of  the century. Net SOC sequestration amounted to 1.96 \u00b1 0.02 Mg C ha-1  relative to unamended soils at the maximum amendment effect. Averaged  across sites and scenarios, SOC sequestration peaked 22 \u00b1 1 years after  amendment and declined but remained positive throughout the century. While  compost stimulated nitrous oxide (N2O) emissions, the cumulative net  emissions (in CO2 equivalents) due to compost were far less than the  amount of SOC sequestered. Compost amendments resulted in a net climate  benefit of 69.6 \u00b1 0.5 Tg CO2e 20 \u00b1 1 years after amendment if applied to  similar ecosystems across the state, amounting to 39% of California\u2019s  rangeland. These results suggest that the biogeochemical benefits of a  single amendment of compost to rangelands in California is insensitive to  future climate change and could contribute to decadal-scale climate  mitigation goals alongside emissions reductions.", "keywords": ["2. Zero hunger", "compost", "HadGEM2-ES", "15. Life on land", "California", "12. Responsible consumption", "soil organic carbon", "DayCent", "CanESM2", "RCP8.5", "13. Climate action", "RCP4.5", "nitrous oxide (N2O)", "FOS: Natural sciences"], "contacts": [{"organization": "Mayer, Allegra, Silver, Whendee,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.6078/D1DD85"}, {"rel": "self", "type": "application/geo+json", "title": "10.6078/D1DD85", "name": "item", "description": "10.6078/D1DD85", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.6078/D1DD85"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-05-26T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=nitrous+oxide+%28N2O%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=nitrous+oxide+%28N2O%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=nitrous+oxide+%28N2O%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=nitrous+oxide+%28N2O%29&offset=3", "hreflang": "en-US"}], "numberMatched": 3, "numberReturned": 3, "distributedFeatures": [], "timeStamp": "2026-07-26T21:54:41.090289Z"}