Disturbance affects most terrestrial ecosystems and has the potential to shape their responses to chronic environmental change.
Scrub\uffe2\uff80\uff90oak vegetation regenerating from fire disturbance in subtropical Florida was exposed to experimentally elevated carbon dioxide (CO2) concentration (+350\uffc2\uffa0\uffce\uffbcl\uffc2\uffa0l\uffe2\uff88\uff921) using open\uffe2\uff80\uff90top chambers for 11\uffc2\uffa0yr, punctuated by hurricane disturbance in year 8. Here, we report the effects of elevated CO2 on aboveground and belowground net primary productivity (NPP) and nitrogen (N) cycling during this experiment.
The stimulation of NPP and N uptake by elevated CO2 peaked within 2\uffc2\uffa0yr after disturbance by fire and hurricane, when soil nutrient availability was high. The stimulation subsequently declined and disappeared, coincident with low soil nutrient availability and with a CO2\uffe2\uff80\uff90induced reduction in the N concentration of oak stems.
These findings show that strong growth responses to elevated CO2 can be transient, are consistent with a progressively limited response to elevated CO2 interrupted by disturbance, and illustrate the importance of biogeochemical responses to extreme events in modulating ecosystem responses to global environmental change.
", "keywords": ["0106 biological sciences", "NITROGEN-USE EFFICIENCY", "Scrub oak ecosystem", "01 natural sciences", "Trees", "Quercus", "Soil", "nitrogen cycling", "oak woodland", "ECOSYSTEMS", "Global environmental change", "Biomass", "ROOT BIOMASS", "disturbance", "Florida scrub", "elevated CO2", "Elevated atmospheric CO2", "Plant Stems", "Cyclonic Storms", "Aboveground biomass", "FOREST PRODUCTIVITY", "Hurricane", "04 agricultural and veterinary sciences", "Nitrogen Cycle", "Fire", "Soil carbon", "LONG-TERM EXPOSURE", "Net primary productivity", "Long term exposure", "Florida", "Elevated CO2", "fire", "FLORIDA SCRUB", "ABOVEGROUND BIOMASS", "Nitrogen cycling", "TERRESTRIAL", "Oak woodland", "ELEVATED ATMOSPHERIC CO2", "Elevated CO 2", "Nitrogen", "hurricane", "Forest productivity", "Fires", "Terrestrial ecosystems", "SCRUB-OAK ECOSYSTEM", "Net primary productivity (NPP)", "Ecosystem", "Nitrogen use efficiency", "Atmosphere", "net primary productivity (NPP)", "Root biomass", "Plant Sciences", "global environmental change", "Disturbance", "Carbon Dioxide", "15. Life on land", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "SOIL CARBON"]}, "links": [{"href": "https://digitalcommons.odu.edu/context/biology_fac_pubs/article/1266/viewcontent/Day2013FireHurricaneandCarbonDioxideOCR.pdf"}, {"href": "https://doi.org/10.1111/nph.12409"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/New%20Phytologist", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/nph.12409", "name": "item", "description": "10.1111/nph.12409", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/nph.12409"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-07-22T00:00:00Z"}}, {"id": "10.5194/bg-8-353-2011", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-27T16:22:42Z", "type": "Journal Article", "created": "2011-02-14", "title": "Free Atmospheric Co2 Enrichment Increased Above Ground Biomass But Did Not Affect Symbiotic N-2-Fixation And Soil Carbon Dynamics In A Mixed Deciduous Stand In Wales", "description": "Abstract. Through increases in net primary production (NPP), elevated CO2 is hypothesized to increase the amount of plant litter entering the soil. The fate of this extra carbon on the forest floor or in mineral soil is currently not clear. Moreover, increased rates of NPP can be maintained only if forests can escape nitrogen limitation. In a Free atmospheric CO2 Enrichment (FACE) experiment near Bangor, Wales, 4 ambient and 4 elevated [CO2] plots were planted with patches of Betula pendula, Alnus glutinosa and Fagus sylvatica on a former arable field. After 4 years, biomass averaged for the 3 species was 5497 (se 270) g m\uffe2\uff88\uff922 in ambient and 6450 (se 130) g m\uffe2\uff88\uff922 in elevated [CO2] plots, a significant increase of 17% (P = 0.018). During that time, only a shallow L forest floor litter layer had formed due to intensive bioturbation. Total soil C and N contents increased irrespective of treatment and species as a result of afforestation. We could not detect an additional C sink in the soil, nor were soil C stabilization processes affected by elevated [CO2]. We observed a decrease of leaf N content in Betula and Alnus under elevated [CO2], while the soil C/N ratio decreased regardless of CO2 treatment. The ratio of N taken up from the soil and by N2-fixation in Alnus was not affected by elevated [CO2]. We infer that increased nitrogen use efficiency is the mechanism by which increased NPP is sustained under elevated [CO2] at this site.
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Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the Other's research activities.\" Although every care has been taken in preparing and testing the data, the Other and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the Other and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. 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Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the ZALF Datenerfassung's research activities.\" Although every care has been taken in preparing and testing the data, the ZALF Datenerfassung and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the ZALF Datenerfassung and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. 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Concepts, version 2.4"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the Other's research activities.\" Although every care has been taken in preparing and testing the data, the Other and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the Other and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The Other and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2025-05-12", "type": "Dataset", "created": "2024-08-20", "language": "eng", "title": "50 years box plot experiment in Grossbeeren (1972 - 2022) - Plots", "description": "The Box Plot Experiment in Grossbeeren was set up in 1972 to investigate the effect of different fertilization strategies within an irrigated vegetable crop rotation system for three different soils. Therefore, this vegetable long-term fertilization experiment can be used to investigate different plant-soil-systems under the same climatic conditions. The experimented was halted in 2022. The experimental site (52\u00b021\u201901.30\u2019\u2019 N, 13\u00b019\u201905.47\u2019\u2019 E, 50 m a.s.l.) is located in the transition zone between the more maritime-affected Northern German Plain and the continental climate of the European mainland. Weather data were collected in an agrometeorological station close to the experimental area. The long-term means (1991-2020) for air temperature and annual precipitation are 9.7 \u00b0C and 492 mm. The single plots are quadratic concrete boxes with walls of 10 cm thickness, a surface area of 4 m2 and a depth of 75 cm. The upper 50 cm are filled with the tested soils; the lower 25 cm comprises a coarse-sandy drainage layer. The three soil types are Arenic Luvisol (weak loamy sand), Gleyic Fluvisol (heavy sandy loam) and Luvic-Phaeozem (medium clayey silt) according to the World Reference Base \u2013 WRB (and the Bodenkundliche Kartieranleitung \u2013 KA4). Within 10 rotations, the vegetable species white cabbage (Brassica oleracea L. var. capitata f. alba), carrot (Daucus carota L.), cucumber (Cucumis sativus L.), leek (Allium porrum L.) and celery (Apium graveolens L. var. rapaceum Mill.) were cultivated. No celery was cultivated during the first rotation. The experiment consists of 12 fertilization treatments in different combinations of mineral N fertilization and organic amendments and as quadruplicate for each of the three soils. The experimental set-up scheme can be found in the supplementary material. Mineral N fertilizer was applied as calcium ammonium nitrate. Mineral P and K fertilization was uniform for all treatments. Total N and total C in soil, plant and organic amendments were determined using a CNS analyser VARIO El (Elemental Hanau) since 1995 and before by wet combustion with K2Cr2O7 und H2SO4. C and N in the soil samples and N in the plant samples were analysed annually. The C contents of the crop residues (leaf + stalk + root) of the five vegetable species were investigated irregularly. In autumn, the soil was annually dug up to 20 cm by using a spade. Weeds were removed by a combination of mechanical (cultivator, rake or hoe) and chemical measures. Insect protection nets, insecticides or fungicides were used where necessary. Approximately 150 mm per year was additionally irrigated with a sprinkler system. More details about the experiment\u2019s description can be found in the supplementary material. Description of table 1\n\nRelated datasets are listed in the metadata element 'Related Identifier'.\nDataset version 1.0", "formats": [{"name": "CSV"}], "keywords": ["horticulture", "long-term experiments", "vegetable crops", "fertilization", "fertilizers", "soil types", "soil fertility", "soil organic carbon", "soil organic matter", "field crops", "crop management", "crop production", "crop rotation", "crop residues", "crop residue management", "crop yield", "nutrient balance", "nutrient management", "nutrient uptake", "nutrient use efficiency", "nutrient utilization", "nitrogen", "nitrogen balance", "nitrogen content", "nitrogen fertilizers", "nitrogen-use efficiency", "potassium", "phosphorus", "magnesium", "cucumbers", "Cucumis", "Cucumis sativus", "carrots", "Daucus carota", "cabbages", "Brassica oleracea var. capitata", "leeks", "Allium ampeloprasum", "celery", "Apium graveolens", "Apium graveolens var. rapaceum", "farmyard manure", "organic amendments", "organic fertilizers", "slurry", "bark mulches", "resource management", "Luvisols", "Fluvisols", "Phaeozems", "opendata", "Boden", "agricultural management", "horticulture", "crop production", "crop rotation", "crop waste", "cultivation", "cultivation system", "cultivation method", "food production (agriculture)", "irrigation farming", "manure", "mineral fertiliser", "nitrogenous fertiliser", "organic fertiliser", "soil fertilisation", "soil fertility", "vegetable", "vegetable cultivation", "vegetable waste", "yield (agricultural)", "resource utilisation", "organic matter", "phosphate"], "contacts": [{"name": "Eric B\u00f6necke", "organization": "Leibniz-Institut f\u00fcr Gem\u00fcse- und Zierpflanzenbau - 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IGZ", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "ruehlmann@igzev.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "ZALF", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"organization": "Martin-Luther University Halle-Wittenberg;Leibniz-Institut f\u00fcr Gem\u00fcse- und Zierpflanzenbau - IGZ", "roles": ["contributor"]}], "title_alternate": "LTE: Part 1/25, table: Plots"}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=03b52930-0210-4bfc-a4ac-75f7544ce7a5", "rel": "download"}, {"href": "https://metadata.bonares.de:443/smartEditor/preview/Sellerie_2016.JPG", "name": "preview", "description": "Web image thumbnail (URL)", "protocol": "WWW:LINK-1.0-http--image-thumbnail", "rel": "preview"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/03b52930-0210-4bfc-a4ac-75f7544ce7a5", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "03b52930-0210-4bfc-a4ac-75f7544ce7a5", "name": "item", "description": "03b52930-0210-4bfc-a4ac-75f7544ce7a5", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/03b52930-0210-4bfc-a4ac-75f7544ce7a5"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-05-12T00:00:00Z"}}, {"id": "53209a68-e177-4d96-bc33-50ab5dcad8de", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[13.79, 53.38], [13.79, 53.38], [13.79, 53.38], [13.79, 53.38], [13.79, 53.38]]]}, "properties": {"themes": [{"concepts": [{"id": "farming"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "greenhouse gases"}, {"id": "sensors"}, {"id": "stable isotopes"}, {"id": "appropriate technology"}, {"id": "water-use efficiency"}, {"id": "nitrogen-use efficiency"}, {"id": "carbon sequestration"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "opendata"}, {"id": "low-cost measurement equipment"}, {"id": "Sensor Platform"}, {"id": "GHG fluxes"}, {"id": "spectral plant indices"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}], "scheme": "GEMET - 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Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the ZALF Datenerfassung's research activities.\" Although every care has been taken in preparing and testing the data, the ZALF Datenerfassung and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the ZALF Datenerfassung and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The ZALF Datenerfassung and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2025-09-04", "type": "Dataset", "created": "2025-01-08", "language": "eng", "title": "AgroFlux \u2013 an automated, experimental sensor platform", "description": "Generally, isolation of scientific disciplines has hindered the development of integrated solutions to many pressing problems. To achieve a holistic understanding of responses to land management or climate change it is important, to jointly evaluate complex feedbacks among different variables across spatio-temporal scales, requiring different scientific disciplines \u2013 e.g., biogeochemistry, hydrology, socioeconomics - to work in concert. To do so, the holistic, automated experimental sensor platform AgroFlux aims to serve as multidisciplinary hub that integrate process-based knowledge over a wide range of spatio-temporal scales. In its current stage the AgroFlux experimental sensor platform features: 1) an automatized gantry crane robotic system to detect crop phenology (e.g., proximal sensing of spectral plant indices (NDVI, RVI) and IR canopy temperatures), GHG and ET flux dynamics (FT-NSS closed canopy chambers); 2) UAV based remote sensing for upscaling purposes; 3) flexible, adaptive measurement infrastructure (e.g., IoT sensor network, canopy chambers, proximal sensors for NDVI, RVI; IR canopy temperatures); 4) in-situ stable isotope (C, N and water) monitoring along soil-plant atmosphere gradients (flux separation); and 5) experiment based determination of processes within soil-plant atmosphere interphase (e.g., plant-soil feedbacks). The site is embedded within the ZALF Focus Area Quillow (https://doi.org/10.4228/zalf.7161-ft27) and the Research Station Dedelow (https://doi.org/10.4228/zalf-m262-ap29).", "formats": [{"name": "CSV"}], "keywords": ["Soil", "greenhouse gases", "sensors", "stable isotopes", "appropriate technology", "water-use efficiency", "nitrogen-use efficiency", "carbon sequestration", "opendata", "low-cost measurement equipment", "Sensor Platform", "GHG fluxes", "spectral plant indices", "Boden", "Germany", "Brandenburg", "Uckermark", "Focus Area Quillow", "Site Research Station Dedelow"], "contacts": [{"name": "Leibniz Centre for Agricultural Landscape Research", "organization": "ZALF", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", 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Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the Other's research activities.\" Although every care has been taken in preparing and testing the data, the Other and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the Other and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The Other and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2024-08-27", "created": "2022-07-19", "language": "eng", "title": "50 years box plot experiment in Grossbeeren (1972 - 2022) - Test components (for statistical evaluation)", "description": "Table with information about the treatment. In the one-factorial trial a level of the factor and in the multi-factorial trial a combination of the levels of the factors\n\nGeneral description see mother table: (https://doi.org/10.20387/bonares-fd75-nca9); Related datasets are listed in the metadata element 'Related Identifier'.\nDataset version 1.0", "formats": [{"name": "CSV"}], "keywords": ["horticulture", "long-term experiments", "vegetable crops", "fertilization", "fertilizers", "soil types", "soil fertility", "soil organic carbon", "soil organic matter", "field crops", "crop management", "crop production", "crop rotation", "crop residues", "crop residue management", "crop yield", "nutrient balance", "nutrient management", "nutrient uptake", "nutrient use efficiency", "nutrient utilization", "nitrogen", "nitrogen balance", "nitrogen content", "nitrogen fertilizers", "nitrogen-use efficiency", "potassium", "phosphorus", "magnesium", "cucumbers", "Cucumis", "Cucumis sativus", "carrots", "Daucus carota", "cabbages", "Brassica oleracea var. capitata", "leeks", "Allium ampeloprasum", "celery", "Apium graveolens", "Apium graveolens var. rapaceum", "farmyard manure", "organic amendments", "organic fertilizers", "slurry", "bark mulches", "resource management", "Luvisols", "Fluvisols", "Phaeozems", "opendata", "Boden", "agricultural management", "horticulture", "crop production", "crop rotation", "crop waste", "cultivation", "cultivation system", "cultivation method", "food production (agriculture)", "irrigation farming", "manure", "mineral fertiliser", "nitrogenous fertiliser", "organic fertiliser", "soil fertilisation", "soil fertility", "vegetable", "vegetable cultivation", "vegetable waste", "yield (agricultural)", "resource utilisation", "organic matter", "phosphate"], "contacts": [{"name": "Eric B\u00f6necke", "organization": "Leibniz-Institut f\u00fcr Gem\u00fcse- und Zierpflanzenbau - IGZ", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "boenecke@igzev.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Dominik M\u00fcller", "organization": "Martin-Luther University Halle-Wittenberg", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "dominik.mueller2@student.uni-halle.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "ZALF", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "J\u00f6rg R\u00fchlmann", "organization": "Leibniz-Institut f\u00fcr Gem\u00fcse- und Zierpflanzenbau - IGZ", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "ruehlmann@igzev.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"organization": "Leibniz-Institut f\u00fcr Gem\u00fcse- und Zierpflanzenbau - IGZ", "roles": ["contributor"]}], "title_alternate": "LTE: Part 22/25, table: Test components (for statistical evaluation)"}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=", "rel": "download"}, {"href": "https://metadata.bonares.de:443/smartEditor/preview/Sellerie_2016.JPG", "name": "preview", "description": "Web image thumbnail (URL)", "protocol": "WWW:LINK-1.0-http--image-thumbnail", "rel": "preview"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/03b52930-0210-4bfc-a4ac-75f7544ce7a5", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "689f10b1-ff96-43c9-b871-4cfcbad5aca2", "name": "item", "description": "689f10b1-ff96-43c9-b871-4cfcbad5aca2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/689f10b1-ff96-43c9-b871-4cfcbad5aca2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-08-27T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=nitrogen-use+efficiency&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=nitrogen-use+efficiency&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=nitrogen-use+efficiency&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=nitrogen-use+efficiency&offset=9", "hreflang": "en-US"}], "numberMatched": 9, "numberReturned": 9, "distributedFeatures": [], "timeStamp": "2026-07-28T15:55:21.054122Z"}