Ecosystems often show differential sensitivity to chronic nitrogen (N) deposition; hence, a critical challenge is to improve our understanding of how and why site\uffe2\uff80\uff90specific factors mediate biogeochemical responses to N enrichment. We examined the extent to which N impacts on soil carbon (C) and N dynamics depend on microbial resource stoichiometry. We added N to forest plots dominated by ectomycorrhizal (ECM) trees, which have litter and soil pools rich in organic N and relatively wide C:N ratios, and adjacent forest plots dominated by arbuscular mycorrhizal (AM) trees, which have litter and soil pools rich in inorganic N and relatively narrow C:N ratios. While microbes in both plot types exhibited fairly strict biomass homeostasis, microbes in AM\uffe2\uff80\uff90 and ECM\uffe2\uff80\uff90dominated plots differed in their physiological responses to N addition. Microbes in ECM plots responded to N enrichment by decreasing their investment in N\uffe2\uff80\uff90acquisition enzymes (relative to C\uffe2\uff80\uff90acquisition enzymes) and increasing N mineralization rates (relative to C mineralization rates), suggesting that N addition alleviated microbial N demand. In contrast, heterotrophic microbial activities in AM plots were unaffected by N addition, most likely as a result of N\uffe2\uff80\uff90induced increases in net nitrification (60% increase relative to control plots) and nitrate mobilization (e.g., sixfold increases in mobilization relative to control plots). Combined, our findings suggest the stoichiometric differences between AM and ECM soils are the primary drivers of the observed responses. Plant and microbial communities characterized by wide C:N are more susceptible to N\uffe2\uff80\uff90induced changes in decomposition and soil C dynamics, whereas communities characterized by narrow C:N are more susceptible to N\uffe2\uff80\uff90induced nitrate leaching losses. Hence, the biogeochemical consequences of N deposition in temperate forests may be driven by the stoichiometry of the dominant trees and their associated microbes.
", "keywords": ["2. Zero hunger", "Soil", "Nitrates", "Nitrogen", "13. Climate action", "Mycorrhizae", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "Forests", "Nitrogen Cycle", "15. Life on land", "Nitrification"]}, "links": [{"href": "https://doi.org/10.1002/ecy.1595"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/ecy.1595", "name": "item", "description": "10.1002/ecy.1595", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/ecy.1595"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-12-01T00:00:00Z"}}, {"id": "10.1002/ecy.2936", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:02Z", "type": "Journal Article", "created": "2019-11-21", "title": "Soil chemistry turned upside down: a meta\u2010analysis of invasive earthworm effects on soil chemical properties", "description": "AbstractRecent studies have shown that invasive earthworms can dramatically reduce native biodiversity, both above and below the ground. However, we still lack a synthetic understanding of the underlying mechanisms behind these changes, such as whether earthworm effects on soil chemical properties drive such relationships. Here, we investigated the effects of invasive earthworms on soil chemical properties (pH, water content, and the stocks and fluxes of carbon, nitrogen, and phosphorus) by conducting a meta\uffe2\uff80\uff90analysis. Invasive earthworms generally increased soil pH, indicating that the removal of organic layers and the upward transport of more base\uffe2\uff80\uff90rich mineral soil caused a shift in soil pH. Moreover, earthworms significantly decreased soil water content, suggesting that the burrowing activities of earthworms may have increased water infiltration of and/or increased evapotranspiration from soil. Notably, invasive earthworms had opposing effects on organic and mineral soil for carbon and nitrogen stocks, with decreases in organic, and increases in mineral soil. Nitrogen fluxes were higher in mineral soil, whereas fluxes in organic soil were not significantly affected by the presence of invasive earthworms, indicating that earthworms mobilize and redistribute nutrients among soil layers and increase overall nitrogen loss from the soil. Invasive earthworm effects on element stocks increased with ecological group richness only in organic soil. Earthworms further decreased ammonium stocks with negligible effects on nitrate stocks in organic soil, whereas they increased nitrate stocks but not ammonium stocks in mineral soil. Notably, all of these results were consistent across forest and grassland ecosystems underlining the generality of our findings. However, we found some significant differences between studies that were conducted in the field (observational and experimental settings) and in the lab, such as that the effects on soil pH decreased from field to lab settings, calling for a careful interpretation of lab findings. Our meta\uffe2\uff80\uff90analysis provides strong empirical evidence that earthworm invasion may lead to substantial changes in soil chemical properties and element cycling in soil. Furthermore, our results can help explain the dramatic effects of invasive earthworms on native biodiversity, for example, shifts towards the dominance of grass species over herbaceous ones, as shown by recent meta\uffe2\uff80\uff90analyses.
", "keywords": ["Element flux", "Nitrogen", "Earthworm ecological group", "Forests", "Nitrate", "exotic earthworms", "Nutrient cycling", "nitrogen", "Article", "earthworm ecological group", "Soil", "nitrate", "Animals", "phosphorus", "soil carbon", "Oligochaeta", "Ecosystem", "Soil Microbiology", "water content", "Exotic earthworms", "2. Zero hunger", "Water content", "Plan_S-Compliant-TA", "pH", "nutrient cycling", "Phosphorus", "04 agricultural and veterinary sciences", "15. Life on land", "Nitrification", "Soil carbon", "nitrification", "ammonium", "13. Climate action", "international", "0401 agriculture", " forestry", " and fisheries", "element flux", "Ammonium"]}, "links": [{"href": "https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecy.2936"}, {"href": "https://doi.org/10.1002/ecy.2936"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/ecy.2936", "name": "item", "description": "10.1002/ecy.2936", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/ecy.2936"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-01-08T00:00:00Z"}}, {"id": "10.1002/jsfa.4349", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:06Z", "type": "Journal Article", "created": "2011-03-29", "title": "Efficiency Of Urease And Nitrification Inhibitors In Reducing Ammonia Volatilization From Diverse Nitrogen Fertilizers Applied To Different Soil Types And Wheat Straw Mulching", "description": "Some authors suggest that the absence of tillage in agricultural soils might have an influence on the efficiency of nitrogen applied in the soil surface. In this study we investigate the influence of no-tillage and soil characteristics on the efficiency of a urease inhibitor (N-(n-butyl)thiophosphoric triamide, NBPT) and a nitrification inhibitor (diciandiamide, DCD) in decreasing ammonia volatilization from urea and ammonium nitrate (AN), respectively.The results indicate that ammonia volatilization in soils amended with urea was significantly higher than in those fertilized with AN. Likewise, the main soil factors affecting ammonia volatilization from urea are clay and sand soil contents. While clay impedes ammonia volatilization, sand favours it. The presence of organic residues on soil surface (no-tillage) tends to increase ammonia volatilization from urea, although this fact depended on soil type. The presence of NBPT in urea fertilizer significantly reduced soil ammonia volatilization. This action of NBPT was negatively affected by acid soil pH and favoured by soil clay content.The presence of organic residues on soil surface amended with urea increased ammonia volatilization, and was particularly high in sandy compared with clay soils. Application of NBPT reduced ammonia volatilization although its efficiency is reduced in acid soils. Concerning AN fertilization, there were no differences in ammonia volatilization with or without DCD in no-tillage soils.", "keywords": ["2. Zero hunger", "Nitrates", "Plant Stems", "Nitrogen", "Agriculture", "04 agricultural and veterinary sciences", "Hydrogen-Ion Concentration", "Silicon Dioxide", "Nitrification", "Urease", "6. Clean water", "Soil", "Organophosphorus Compounds", "Ammonia", "Clay", "Urea", "0401 agriculture", " forestry", " and fisheries", "Aluminum Silicates", "Enzyme Inhibitors", "Volatilization", "Fertilizers", "Humic Substances", "Triticum"]}, "links": [{"href": "https://doi.org/10.1002/jsfa.4349"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20Science%20of%20Food%20and%20Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/jsfa.4349", "name": "item", "description": "10.1002/jsfa.4349", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/jsfa.4349"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-03-29T00:00:00Z"}}, {"id": "10.1016/j.ecoenv.2020.111380", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:49Z", "type": "Journal Article", "created": "2020-10-01", "title": "Effect of the growth medium composition on nitrate accumulation in the novel protein crop Lemna minor", "description": "Duckweed is a potential alternative protein source for food and feed. However, little is known about the nitrate accumulation in this plant. A high nitrate level in vegetables can indirectly lead to an elevated intake of nitrites and N-nitroso compounds, increasing the risk of diseases for humans and animals. This research hypothesizes that the nitrate accumulation of Lemna minor differs between growing media. Additionally, it evaluates whether legal safety levels of nitrate for human and animal intake are exceeded. The duckweed was grown on (i) rainwater, and (ii) three synthetic media containing different nutrient levels. Furthermore, (iii) biological effluent of swine manure treatment and (iv) aquaculture effluent from pikeperch production were used, as these are potential media for closing nutrient loops in the agriculture sector. It was found that nitrate levels increased with the increasing availability of macronutrients in the water, and pH showed a particularly strong negative correlation with the nitrate levels in the plant. Nevertheless, nitrate content never exceeded 530\u00a0mg NO3 kg-1 fresh weight. To conclude, Lemna minor's nitrate content was below safety limits for human consumption in all tested growing media; however, a potential risk for ruminants was observed as these are more sensitive to nitrate conversions in their gastro-intestinal track.", "keywords": ["Agriculture and Food Sciences", "0106 biological sciences", "0301 basic medicine", "SAMPLES", "Wastewater", "NUTRIENTS", "01 natural sciences", "Food safety", "BIOMASS", "03 medical and health sciences", "Crude protein", "Vegetables", "Lemnaceae", "Animals", "Araceae", "Humans", "Toxicology and Mutagenesis", "PLANT", "FRUITS", "VEGETABLES", "2. Zero hunger", "Nitrates", "Environmental and Occupational Health", "Agricultural effluents", "NITRITE CONTENT", "Agriculture", "General Medicine", "Hydrogen-Ion Concentration", "Pollution", "DUCKWEEDS LEMNACEAE", "6. Clean water", "Culture Media", "NITROGEN", "Feed safety", "Health", "Public Health", "Dietary Proteins"]}, "links": [{"href": "https://doi.org/10.1016/j.ecoenv.2020.111380"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecotoxicology%20and%20Environmental%20Safety", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.ecoenv.2020.111380", "name": "item", "description": "10.1016/j.ecoenv.2020.111380", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.ecoenv.2020.111380"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-12-01T00:00:00Z"}}, {"id": "10.1007/978-94-009-1586-2_62", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:13Z", "type": "Journal Article", "created": "2004-12-04", "title": "Control Of Nitrate Pollution By Application Of Controlled Release Fertilizer (Crf), Compost And An Optimized Irrigation System", "description": "Open Access5 p\u00e1ginas, 2 figuras y 3 tablas estad\u00edsticas", "keywords": ["Nitrate leaching", "2. Zero hunger", "Pollution", " fertilizer", "Fertilizer", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Irrigation", "6. Clean water", "12. Responsible consumption"]}, "links": [{"href": "https://doi.org/10.1007/978-94-009-1586-2_62"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Fertilizer%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/978-94-009-1586-2_62", "name": "item", "description": "10.1007/978-94-009-1586-2_62", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/978-94-009-1586-2_62"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1996-01-01T00:00:00Z"}}, {"id": "10.1007/s00425-017-2647-2", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:30Z", "type": "Journal Article", "created": "2017-01-04", "title": "The cost of surviving nitrogen excess: energy and protein demand in the lichen Cladonia portentosa as revealed by proteomic analysis", "description": "Different nitrogen forms affect different metabolic pathways in lichens. In particular, the most relevant changes in protein expression were observed in the fungal partner, with NO 3- mostly affecting the energetic metabolism and NH 4+ affecting transport and regulation of proteins and the energetic metabolism much more than NO 3- did. Excess deposition of reactive nitrogen is a well-known agent of stress for lichens, but which symbiont is most affected and how, remains a mystery. Using proteomics can expand our understanding of stress effects on lichens. We investigated the effects of different doses and forms of reactive nitrogen, with and without supplementary phosphorus and potassium, on the proteome of the lichen Cladonia portentosa growing in a 'real-world' simulation of nitrogen deposition. Protein expression changed with the nitrogen treatments but mostly in the fungal partner, with NO3- mainly affecting the energetic metabolism and NH4+ also affecting the protein synthesis machinery. The photobiont mainly responded overexpressing proteins involved in energy production. This suggests that in response to nitrogen stress, the photobiont mainly supports the defensive mechanisms initiated by the mycobiont with an increased energy production. Such surplus energy is then used by the cell to maintain functionality in the presence of NO3-, while a futile cycle of protein production can be hypothesized to be induced by NH4+ excess. External supply of potassium and phosphorus influenced differently the responses of particular enzymes, likely reflecting the many processes in which potassium exerts a regulatory function.", "keywords": ["Chlorophyll", "Proteomics", "0301 basic medicine", "570", "mycobiont", "Lichens", "Nitrogen", "Cell Respiration", "Nitrate", "Mass Spectrometry", "Molecular mechanism", "03 medical and health sciences", "nitrate", "Ammonia", "Electrophoresis", " Gel", " Two-Dimensional", "Photosynthesis", "Ammonium", " Molecular mechanism", " Mycobiont", " Nitrate", " Photobiont", " Stress response", "Ammonium; Molecular mechanism; Mycobiont; Nitrate; Photobiont; Stress response; Genetics; Plant Science", "0303 health sciences", "Nitrates", "Stress response", "Chlorophyll A", "stress response", "Mycobiont", "ammonium", "Photobiont", "photobiont", "molecular mechanism", "Energy Metabolism", "Ammonium"]}, "links": [{"href": "http://link.springer.com/content/pdf/10.1007/s00425-017-2647-2.pdf"}, {"href": "https://doi.org/10.1007/s00425-017-2647-2"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Planta", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00425-017-2647-2", "name": "item", "description": "10.1007/s00425-017-2647-2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00425-017-2647-2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-01-04T00:00:00Z"}}, {"id": "10.1007/s00442-005-0109-1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:30Z", "type": "Journal Article", "created": "2005-07-07", "title": "Plant N Capture From Pulses: Effects Of Pulse Size, Growth Rate, And Other Soil Resources", "description": "In arid ecosystems, the ability to rapidly capture nitrogen (N) from brief pulses is expected to influence plant growth, survival, and competitive ability. Theory and data suggest that N capture from pulses should depend on plant growth rate and availability of other limiting resources. Theory also predicts trade-offs in plant stress tolerance and ability to capture N from different size pulses. We injected K15NO3, to simulate small and large N pulses at three different times during the growing season into soil around the co-dominant Great Basin species Sarcobatus vermiculatus, Chrysothamnus nauseosus ssp. consimilis, and Distichlis spicata. Soils were amended with water and P in a partial factorial design. As predicted, all study species showed a comparable decline in N capture from large pulses through the season as growth rates slowed. Surprisingly, however, water and P availability differentially influenced the ability of these species to capture N from pulses. Distichlis N capture increased up to tenfold with water addition while Chrysothamnus N capture increased up to threefold with P addition. Sarcobatus N capture was not affected by water or P availability. Opposite to our prediction, Sarcobatus, the most stress tolerant species, captured less N from small pulses but more N from large pulses relative to the other species. These observations suggest that variation in N pulse timing and size can interact with variable soil water and P supply to determine how N is partitioned among co-existing Great Basin species.", "keywords": ["2. Zero hunger", "0106 biological sciences", "Nitrates", "Time Factors", "Nitrogen Isotopes", "Nitrogen", "Potassium Compounds", "Water", "Phosphorus", "15. Life on land", "Plant Roots", "01 natural sciences", "California", "Plant Leaves", "Magnoliopsida", "Soil", "Seasons", "Plant Shoots"], "contacts": [{"organization": "Jeremy J. James, James H. Richards,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s00442-005-0109-1"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-005-0109-1", "name": "item", "description": "10.1007/s00442-005-0109-1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-005-0109-1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-07-08T00:00:00Z"}}, {"id": "10.1007/s00442-011-2133-7", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:31Z", "type": "Journal Article", "created": "2011-10-04", "title": "Soil Warming Alters Nitrogen Cycling In A New England Forest: Implications For Ecosystem Function And Structure", "description": "Global climate change is expected to affect terrestrial ecosystems in a variety of ways. Some of the more well-studied effects include the biogeochemical feedbacks to the climate system that can either increase or decrease the atmospheric load of greenhouse gases such as carbon dioxide and nitrous oxide. Less well-studied are the effects of climate change on the linkages between soil and plant processes. Here, we report the effects of soil warming on these linkages observed in a large field manipulation of a deciduous forest in southern New England, USA, where soil was continuously warmed 5\u00b0C above ambient for 7 years. Over this period, we have observed significant changes to the nitrogen cycle that have the potential to affect tree species composition in the long term. Since the start of the experiment, we have documented a 45% average annual increase in net nitrogen mineralization and a three-fold increase in nitrification such that in years 5 through 7, 25% of the nitrogen mineralized is then nitrified. The warming-induced increase of available nitrogen resulted in increases in the foliar nitrogen content and the relative growth rate of trees in the warmed area. Acer rubrum (red maple) trees have responded the most after 7 years of warming, with the greatest increases in both foliar nitrogen content and relative growth rates. Our study suggests that considering species-specific responses to increases in nitrogen availability and changes in nitrogen form is important in predicting future forest composition and feedbacks to the climate system.", "keywords": ["Ecosystem ecology - Original Paper", "0106 biological sciences", "550", "Nitrogen", "Climate Change", "Population Dynamics", "Acer", "04 agricultural and veterinary sciences", "Nitrogen Cycle", "15. Life on land", "Nitrate Reductase", "01 natural sciences", "Trees", "Soil", "Species Specificity", "New England", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Ecology", " Evolution", " Behavior and Systematics", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1007/s00442-011-2133-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-011-2133-7", "name": "item", "description": "10.1007/s00442-011-2133-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-011-2133-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-10-05T00:00:00Z"}}, {"id": "10.1007/s10021-010-9341-6", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:35Z", "type": "Journal Article", "created": "2010-05-27", "title": "Size Of Precipitation Pulses Controls Nitrogen Transformation And Losses In An Arid Patagonian Ecosystem", "description": "Arid ecosystems receive precipitation pulses of different sizes that may differentially affect nitrogen (N) losses and N turnover during the growing season. We designed a rainfall manipulation experiment in the Patagonian steppe, southern Argentina, where we simulated different precipitation patterns by adding the same amount of water in evenly spaced three-small rainfall events or in one-single large rainfall event, three times during a growing season. We measured the effect of the size of rainfall pulses on N mineralization and N losses by denitrification, ammonia volatilization, and nitrate and ammonia leaching. Irrigation pulses stimulated N mineralization (P < 0.05), with small and frequent pulses showing higher responses than large pulses (P < 0.10). Irrigation effects were transient and did not result in changes in seasonal net N mineralization suggesting a long-term substrate limitation. Water pulses stimulated gaseous N losses by denitrification, with large pulses showing higher responses than small pulses (P < 0.05), but did not stimulate ammonia volatilization. Nitrate leaching also was higher after large than after small precipitation events (P < 0.05). Small events produced higher N transformations and lower N losses by denitrification and nitrate leaching than large events, which would produce higher N availability for plant growth. Climate change is expected to increase the frequency of extreme precipitation events and the proportion of large to small rainfall events. Our results suggest that these changes would result in reduced N availability and a competitive advantage for deep-rooted species that prefer nitrate over ammonia. Similarly, the ammonium:nitrate ratio might decrease because large events foster nitrate losses but not ammonium losses.", "keywords": ["2. Zero hunger", "Ammonia Volatilization", "Precipitation Pulses", "Arid Ecosystems", "Patagonian Steppe", "Nitrate Leaching", "Soil Inorganic N", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "Net N Mineralization", "13. Climate action", "https://purl.org/becyt/ford/1.6", "Denitrification", "0401 agriculture", " forestry", " and fisheries", "https://purl.org/becyt/ford/1", "Nitrogen-Water Interactions", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1007/s10021-010-9341-6"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecosystems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10021-010-9341-6", "name": "item", "description": "10.1007/s10021-010-9341-6", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10021-010-9341-6"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-05-28T00:00:00Z"}}, {"id": "10.1007/s10661-018-6700-9", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:46Z", "type": "Journal Article", "created": "2018-05-06", "title": "Improving nitrate load estimates in an agricultural catchment using Event Response Reconstruction", "description": "Low-frequency grab sampling cannot capture fine dynamics of stream solute concentrations, which results in large uncertainties in load estimates. The recent development of high-frequency sensors has enabled monitoring solute concentrations at sub-hourly time scales. This study aimed to improve nitrate (NO3) load estimates using high-resolution records (15-min time interval) from optical sensors to capture the typical concentration response to storm events. An empirical model was developed to reconstruct NO3 concentrations during storm events in a 100-km2 agricultural catchment in Germany. Two years (Jan 2002 to Dec 2002 and Oct 2005 to Sep 2006) of high-frequency measurements of NO3 concentrations, discharge and precipitation were used. An Event Response Reconstruction (ERR) model was developed using NO3 concentration descriptor variables and predictor variables calculated from discharge and precipitation records. Fourteen events were used for calibration, and 27 events from four periods of continuous records of high-frequency measurement were used for validation. During all selected storm events, NO3 concentration decreased during flow rise and increased during the recession phase of the hydrograph. Three storm descriptor variables were used to describe these dynamics: relative change in concentration between initial and minimum NO3 concentrations (rdN), time to maximum change in NO3 concentration (TdN) and time to 50% recovery of NO3 concentration (TN rec ). The ERR consisted of building linear models of discharge and precipitation to predict these three descriptors. The ERR approach greatly improved NO3 load estimates compared to linear interpolation of grab sampling data (error decreased from 10 to 1%) or flow-weighted estimation of load (error is 7%). This study demonstrated that ERR based on a few months of high-resolution data enables accurate load estimates from low-frequency NO3 data.", "keywords": ["Nitrates", "Rivers", "13. Climate action", "Germany", "0208 environmental biotechnology", "Water Pollution", " Chemical", "0207 environmental engineering", "Agriculture", "Nitrogen Oxides", "02 engineering and technology", "Water Pollutants", " Chemical", "6. Clean water", "Environmental Monitoring"]}, "links": [{"href": "https://doi.org/10.1007/s10661-018-6700-9"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Monitoring%20and%20Assessment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10661-018-6700-9", "name": "item", "description": "10.1007/s10661-018-6700-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10661-018-6700-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-05-07T00:00:00Z"}}, {"id": "10.1007/s10705-012-9513-1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:49Z", "type": "Journal Article", "created": "2012-08-06", "title": "Fate Of The Nitrogen From Fertilizers In Field-Grown Maize", "description": "Fil: Rimski korsakov, Helena. Universidad de Buenos Aires. Facultad de Agronomia; Argentina", "keywords": ["2. Zero hunger", "Nitrates", "Organic Fractions", "https://purl.org/becyt/ford/4.1", "0401 agriculture", " forestry", " and fisheries", "https://purl.org/becyt/ford/4", "Nitrate Leaching", "04 agricultural and veterinary sciences", "Volatilization", "15. Life on land", "Tagged Nitrogen", "6. Clean water", "Maize"]}, "links": [{"href": "https://doi.org/10.1007/s10705-012-9513-1"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nutrient%20Cycling%20in%20Agroecosystems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10705-012-9513-1", "name": "item", "description": "10.1007/s10705-012-9513-1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10705-012-9513-1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-07-01T00:00:00Z"}}, {"id": "10.1007/s10705-011-9447-z", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:48Z", "type": "Journal Article", "created": "2011-08-01", "title": "Leaching Losses Of Nitrate Nitrogen And Dissolved Organic Nitrogen From A Yearly Two Crops System, Wheat-Maize, Under Monsoon Situations", "description": "A large amount of nitrogen (N) fertilizers applied to the winter wheat-summer maize double cropping systems in the North China Plain (NCP) contributes largely to N leaching to the groundwater. A series of field experiments were carried out during October 2004 and September 2007 in a lysimeter field to reveal the temporal changes of N leaching losses below 2-m depth from this land system as well as the effects of N fertilizer application rates on N leaching. Four N rates (0, 180, 260, and 360 kg N ha(-1) as urea) were applied in the study area. Seasonal leachate volumes were 87 and 72 mm in the first and second maize season, respectively, and 13 and 4 mm during the winter wheat and maize season in the third rotational year, respectively. The average seasonal flow-weighted NO(3)-N concentrations in leachate for the four N fertilizer application rates ranged from 8.1 to 103.7 mg N l(-1), and seasonal flow-weighted dissolved organic nitrogen (DON) concentrations in leachate varied from 0.8 to 6.0 mg N l(-1). Total amounts of NO(3)-N leaching lost throughout the 3 years were in the range of 14.6 to 177.8 kg ha(-1) for the four N application rates, corresponding to N leaching losses in the range of 4.0-7.6% of the fertilizers applied. DON losses throughout the 3 years were 1.4, 2.1, 3.6, and 6.3 kg N ha(-1) for the four corresponding fertilization rates. The application rate of 180 kg N ha(-1) was recommended based on the balance between reducing N leaching and maintaining crop yields. The results indicated that there is a potential risk of N leaching during the winter wheat season, and over-fertilization of chemical N can result in substantial N leaching losses by high-intensity rainfalls in summer.", "keywords": ["2. Zero hunger", "winter-wheat", "north china plain", "nitrate nitrogen", "in-field lysimeters", "04 agricultural and veterinary sciences", "15. Life on land", "dissolved organic nitrogen", "rotation", "01 natural sciences", "6. Clean water", "corn", "leaching losses", "fertilization", "13. Climate action", "management strategies", "0401 agriculture", " forestry", " and fisheries", "double-cropping system", "agricultural soils", "accumulation", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1007/s10705-011-9447-z"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nutrient%20Cycling%20in%20Agroecosystems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10705-011-9447-z", "name": "item", "description": "10.1007/s10705-011-9447-z", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10705-011-9447-z"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-08-02T00:00:00Z"}}, {"id": "10.1007/s10705-013-9591-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:49Z", "type": "Journal Article", "created": "2013-12-07", "title": "Contribution Of Relay Intercropping With Legume Cover Crops On Nitrogen Dynamics In Organic Grain Systems", "description": "Nitrogen (N) management is a key issue in livestock-free organic grain systems. Relay intercropping with a legume cover crop can be a useful technique for improving N availability when two cash crops are grown successively. We evaluated the benefits of four relay intercropped legumes (Medicago lupulina, Medicago sativa, Trifolium pratense and Trifolium repens) on N dynamics and their contribution to the associated and subsequent cash crops in six fields of organic farms located in South-East France. None of the relay intercropped legumes affected the N uptake of the associated winter wheat but all significantly increased the N uptake of the succeeding spring crop, either maize or spring wheat. The improvement of the N nutrition of the subsequent maize crop induced a 30 % increase in grain yield. All relay intercropped legumes enriched the soil-plant system in N through symbiotic fixation. From 71 to 96 % of the N contained in the shoots of the legumes in late autumn was derived from the atmosphere (Ndfa) and varied between 38 and 67 kg Ndfa ha(-1). Even if the cover crop is expected to limit N leaching during wintertime, the presence of relay intercropped legumes had no significant effect on N leaching during winter compared to the control.", "keywords": ["[SDV.SA]Life Sciences [q-bio]/Agricultural sciences", "2. Zero hunger", "0106 biological sciences", "winter-wheat", "[SDV.SA] Life Sciences [q-bio]/Agricultural sciences", "corn following wheat", "Legume cover crop", "Organic farming", "N uptake", "agricultural system", "natural-abundance", "04 agricultural and veterinary sciences", "15. Life on land", "Nitrate", "01 natural sciences", "630", "Relay intercropping", "n-2 fixation", "undersown crop", "catch crop", "Leaching", "isotopic fractionation", "rhizobial strain", "0401 agriculture", " forestry", " and fisheries", "living mulche"]}, "links": [{"href": "https://doi.org/10.1007/s10705-013-9591-8"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nutrient%20Cycling%20in%20Agroecosystems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10705-013-9591-8", "name": "item", "description": "10.1007/s10705-013-9591-8", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10705-013-9591-8"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-12-08T00:00:00Z"}}, {"id": "10.1007/s10705-014-9650-9", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:49Z", "type": "Journal Article", "created": "2014-10-25", "title": "Nitrate Leaching From Organic And Conventional Arable Crop Farms In The Seine Basin (France)", "description": "In the Seine Basin, characterised by intensive arable crops, most of the surface and groundwater is contaminated by nitrate (NO3-). The goal of this study is to investigate nitrogen leaching on commercial arable crop farms in five organic and three conventional systems. In 2012-2013, a total of 37 fields are studied on eight arable crop rotations, for three different soil and climate conditions. Our results show a gradient of soil solution concentrations in function of crops, lower for alfalfa (mean 2.8 mg NO3-N l(-1)) and higher for crops fertilised after legumes (15 mg NO3-N l(-1)). Catch crops decrease nitrate soil solution concentrations, below 10 mg NO3-N l(-1). For a full rotation, the estimated mean concentrations is lower for organic farming, 12 +/- 5 mg NO3-N l(-1) than for conventional farming 24 +/- 11 mg NO3-N l(-1), with however a large range of variability. Overall, organic farming shows lower leaching rates (14-50 kg NO3-N ha(-1)) than conventional farms (32-77 kg NO3-N ha(-1)). Taking into account the slightly lower productivity of organic systems, we show that yield-scaled leaching values are also lower for organic (0.2 +/- 0.1 kg N kg(-1) N year(-1)) than for conventional systems (0.3 +/- 0.1 kg N kg(-1) N year(-1)). Overall, we show that organic farming systems have lower impact than conventional farming on N leaching, although there is still room for progress in both systems in commercial farms.", "keywords": ["[SDV.SA.AGRO] Life Sciences [q-bio]/Agricultural sciences/Agronomy", "2. Zero hunger", "Organic farming", "Soil Science", "04 agricultural and veterinary sciences", "15. Life on land", "6. Clean water", "Nitrate leaching", "Farmer-centred approach", "Arable crops", "13. Climate action", "Ceramic cups", "[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "0401 agriculture", " forestry", " and fisheries", "Agronomy and Crop Science"], "contacts": [{"organization": "Benoit, Marie, Garnier, Josette, Anglade, Juliette, Billen, Gilles,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s10705-014-9650-9"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nutrient%20Cycling%20in%20Agroecosystems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10705-014-9650-9", "name": "item", "description": "10.1007/s10705-014-9650-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10705-014-9650-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-10-26T00:00:00Z"}}, {"id": "10.1016/j.agee.2013.09.013", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:22Z", "type": "Journal Article", "created": "2013-10-29", "title": "Effects Of Grass-Clover Management And Cover Crops On Nitrogen Cycling And Nitrous Oxide Emissions In A Stockless Organic Crop Rotation", "description": "Nitrogen (N) supply in stockless organic farming may be improved through use of grass-clover for anaerobic digestion, producing biogas and digested manure for use as fertilizer in the crop rotation. We studied the effects of grass-clover management on N cycling, nitrous oxide (N2O) emissions and cash-crop yields in an organic arable crop rotation on a sandy loam soil in a cool temperate climate. The four-course crop rotation included spring barley (with undersown grass-clover), grass-clover, potato and winter wheat (with undersown cover crop). Two fertilization treatments were compared: \u201c\u2212M\u201d where plant material from grass-clover cuts was left in the field to decompose and no fertilizer or manure was applied to any crop in the rotation; and \u201c+M\u201d where plant material from grass-clover cuts was harvested and equivalent amounts of N in digested manure used for fertilization of cash crops in the rotation (spring barley, potato and winter wheat); actual digestion of grass-clover cuttings was not possible, instead digested pig manure was used as substitute for digested grass-clover. Nitrous oxide fluxes were monitored between April 2008 and May 2009. In general, application of digested manure had little or no effect on N2O emissions. Periods of high N2O emissions coincided with cover crop and grass-clover residue turnover, with little added effect of digested manure application. Annual N2O emissions did not vary between fertilization treatments, but the +M treatment had cash crop dry matter yields that were 14% higher than in the \u2212M treatment, and cash crop N yields were increased by 40%. The results show that reallocation of nutrients from grass-clover to cash crops following anaerobic digestion can help solve problems with low N availability. However, issues remain regarding N2O from cover crops and grass-clover in spring.", "keywords": ["anaerobic digestion", "2. Zero hunger", "nitrous oxide", "organic farming", "13. Climate action", "nitrate leaching", "grass-clover", "0401 agriculture", " forestry", " and fisheries", "cover crop", "04 agricultural and veterinary sciences", "15. Life on land", "7. Clean energy", "6. Clean water"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2013.09.013"}, {"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.2013.09.013", "name": "item", "description": "10.1016/j.agee.2013.09.013", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2013.09.013"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-12-01T00:00:00Z"}}, {"id": "10.1007/s11104-016-3073-0", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:00Z", "type": "Journal Article", "created": "2016-10-10", "title": "Response Of Soil Microbial Community To Afforestation With Pure And Mixed Species", "description": "\u00a9 2016, Springer International Publishing Switzerland.Objectives: Afforestation changes soil chemical properties over several decades. In contrast, microbial community structure can be shifted within the first decade and so, the direct effects of tree species can be revealed. The aim of this study was to determine the alteration of soil microbial community composition 10\u00a0years after afforestation by trees with contrasting functional traits. Methods: The study was conducted at the BangorDIVERSE temperate forest experiment. Soil samples were collected under single, two and three species mixtures of alder and birch, beech and oak - early and secondary successional species, respectively, and contiguous agricultural field. Soil was analysed for total carbon (C) and nitrogen (N) contents, and microbial community structure (phospholipid fatty acids (PLFAs) analysis). Results and conclusions: The total PLFAs content (370\u2013640\u00a0nmol\u00a0g\u22121soil) in forest plots increased for 30 to 110\u00a0% compared to the agricultural soil (290\u00a0nmol\u00a0g\u22121soil). In contrast, soil C, N and C/N ratios were altered over 10\u00a0years much less - increased only up to 20\u00a0% or even decreased (for beech forest). Afforestation increased bacterial PLFAs by 20\u2013120\u00a0%, whereas it had stronger impact on the development of fungal communities (increased by 50\u2013200\u00a0%). These effects were proved for all forests, but were more pronounced under the monocultures compared to mixtures. This indicates that species identity has a stronger effect than species diversity. Principal component analysis of PLFAs revealed that under mono and three species mixtures similar microbial communities were formed. In contrast, gram-positive PLFAs and actinomycete PLFAs contributed mainly to differentiation of two species mixtures from other forests. Thus, at the early afforestation stage: i) soil biological properties are altered more than chemical, and ii) tree species identity affects more than species amount on both processes.", "keywords": ["2. Zero hunger", "570", "Microbial biomarkers", "Plant microbial interactions", "Soil solution", "Tree identity", "0401 agriculture", " forestry", " and fisheries", "Woodland", "04 agricultural and veterinary sciences", "15. Life on land", "Land use change", "Ammonium and nitrate", "Forest composition"]}, "links": [{"href": "https://doi.org/10.1007/s11104-016-3073-0"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-016-3073-0", "name": "item", "description": "10.1007/s11104-016-3073-0", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-016-3073-0"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-10-10T00:00:00Z"}}, {"id": "10.1007/s11356-017-9798-3", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:05Z", "type": "Journal Article", "created": "2017-08-12", "title": "Nitrate pollution in the Warta River (Poland) between 1958 and 2016: trends and causes", "description": "The article presents analyses of long-term water quality data from the Warta River between 1958 and 2016. A clear increasing trend in nitrate concentrations was observed from 1958 to the early 1990s. This trend was mainly related to the increasing use of fertilizers in Poland in this period. Then, after the early 1990s, a slow decreasing trend related to improvements in water and sewage management and more rational fertilizer use was observed after political and economic changes in Poland. The influence of long-term hydrological droughts on nitrate concentrations was also investigated. Sharp increases in the nitrate concentration in surface water were related to the accumulation of contaminants in the soil and aeration zone during drought periods and the subsequent transport of these contaminants to groundwater and surface water via recharge infiltration after each drought period. The presented results highlight the importance of surface water-groundwater interactions and suggest that groundwater protection in an entire catchment area is essential for surface water quality protection.", "keywords": ["Nitrates", "0207 environmental engineering", "Agriculture", "02 engineering and technology", "15. Life on land", "01 natural sciences", "6. Clean water", "Soil", "Rivers", "Water Supply", "13. Climate action", "Water Quality", "Humans", "Poland", "Fertilizers", "Groundwater under Threat from Diffuse Contaminants: Improving on-Site Sanitation", " Agriculture and Water Supply Practices", "Groundwater", "Water Pollutants", " Chemical", "Environmental Monitoring", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://link.springer.com/content/pdf/10.1007/s11356-017-9798-3.pdf"}, {"href": "https://doi.org/10.1007/s11356-017-9798-3"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20and%20Pollution%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11356-017-9798-3", "name": "item", "description": "10.1007/s11356-017-9798-3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11356-017-9798-3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-08-12T00:00:00Z"}}, {"id": "10.1016/j.agee.2009.10.005", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:19Z", "type": "Journal Article", "created": "2009-11-16", "title": "Effects Of Catch Crops, No Till And Reduced Nitrogen Fertilization On Nitrogen Leaching And Balance In Three Long-Term Experiments", "description": "Abstract Improved agricultural practices are encouraged to reduce nitrate leaching and greenhouse gas emissions. However, the effects of these practices are often studied at annual or rotation scale without considering their long-term impacts. We have evaluated the effects of catch crops (CC), no-till (NT) and reduced nitrogen fertilization (N\u2212) on nitrogen fate in soil\u2013plant system during 13\u201317 years in three experiments in Northern France. CC were present in all sites whereas tillage treatment and N fertilization rate were tested separately at one site. Crop biomass, N uptake and N leaching were monitored during the whole period. The N balance, i.e. the difference between N inputs and crop exportations, was only affected by fertilization rate whereas leached N varied with all techniques. CC was the most efficient technique to decrease N leaching (from 36 to 62%) and remained efficient on the long term. NT and N\u2212 had a positive but smaller impact. N storage in soil organic matter was markedly increased by CC (by 10\u201324\u00a0kg\u00a0ha \u22121 \u00a0yr \u22121 ), decreased by N\u2212 (\u22127.3\u00a0kg\u00a0ha \u22121 \u00a0yr \u22121 ) and not significantly affected by NT. The differences in gaseous N losses (denitrification\u00a0+\u00a0volatilization) between treatments were assessed by nitrogen mass balance. CC establishment had no significant effect on N gaseous emissions while NT increased them by 3.6\u00a0\u00b1\u00a00.9\u00a0kg\u00a0N\u00a0ha \u22121 \u00a0yr \u22121 and N\u2212 reduced them by 13.6\u00a0\u00b1\u00a04.6\u00a0kg\u00a0N\u00a0ha \u22121 \u00a0yr \u22121 . Catch crops appear as a win/win technique with respect to nitrate leaching and C and N sequestration in soil.", "keywords": ["2. Zero hunger", "571", "carbon", "sequestration", "cover crop", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "6. Clean water", "storage", "[SDV.EE] Life Sciences [q-bio]/Ecology", " environment", "nitrate", "13. Climate action", "[SDV.EE]Life Sciences [q-bio]/Ecology", "uptake", "0401 agriculture", " forestry", " and fisheries", "environment", "gaseous losses", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2009.10.005"}, {"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.2009.10.005", "name": "item", "description": "10.1016/j.agee.2009.10.005", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2009.10.005"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-02-01T00:00:00Z"}}, {"id": "10.1016/j.agee.2010.08.002", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:20Z", "type": "Journal Article", "created": "2010-08-23", "title": "Effect Of Soil Warming And Rainfall Patterns On Soil N Cycling In Northern Europe", "description": "Abstract With climate change northern Europe is expected to experience extreme increase in air temperatures, particularly during the winter months, influencing soil temperatures in these regions. Climate change is also projected to influence the rainfall amount, and its inter- and intra-annual variability. These changes may affect soil moisture regimes, soil water drainage, soil nitrogen (N) availability and N leaching to aquatic environment and N2O emissions to atmosphere. Thus it is important to study the effects of increased soil temperature and varying rainfall patterns on soil N cycling in arable land from temperate climates, which is a major source of N pollution. An open-field lysimeter study was carried out during 2008\u20132009 in Denmark on loamy sand soil (Typic Hapludult) with three factors: number of rainy days, rainfall amount and soil warming. Number of rainy days included the mean monthly rainy days for 1961\u20131990 as \u2018normal\u2019 and half the number of rainy days of former as \u2018reduced\u2019 treatments. Rainfall amount included mean monthly rainfall for 1961\u20131990 as \u2018present\u2019 and the projected change in mean monthly rainfall for 2071\u20132100 as \u2018future\u2019 treatments. Soil warming included increase in soil temperature by 5\u00a0\u00b0C at 0.1\u00a0m depth as \u2018heated\u2019 and non-heated as \u2018control\u2019 treatments. Automated mobile rain-out shelter and irrigation system, and insulated buried heating cables were used to impose the treatments. Soil warming, compared with unheated control, advanced winter wheat crop development, and increased the above-ground biomass and N uptake only during vegetative stage, but shortened the total crop growing period by 12 days without reducing the total above-ground biomass. Rainfall amount and rainy days treatments increased the drainage, 46% and 10%, respectively, but did not have additive effect on the drainage. In contrast, soil warming increased crop evapotranspiration (18%) and reduced drainage (41%). The projected future rainfall amount increased NO3-N leaching (289%) compared with present rainfall amount. The study showed significant interaction between soil warming and rainfall amount (P", "keywords": ["Nitrate leaching", "Winter wheat", "2. Zero hunger", "Soil nitrogen", "BRIC", "13. Climate action", "Climate change", "Drainage", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "/dk/atira/pure/core/keywords/Bric", "6. Clean water"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2010.08.002"}, {"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.2010.08.002", "name": "item", "description": "10.1016/j.agee.2010.08.002", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2010.08.002"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-10-15T00:00:00Z"}}, {"id": "10.1016/j.agee.2011.06.014", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:21Z", "type": "Journal Article", "created": "2011-07-07", "title": "Nitrate Leaching Under Maize Cropping Systems In Po Valley (Italy)", "description": "Intensive crop production in Po Valley (Northern Italy) is associated to high risk of nitrate leaching. A multi-year monitoring of soil solution nitrogen was conducted at 6 sites under the ordinary farm management of maize crop (lea mays L.) in order to assess NO3-N leaching. The amount of N fertilizer (organic + mineral) varied from 209 to 801 kg N ha(-1) year(-1). Maize biomass ranged from 15 to 32 t ha(-1) and N removal from 150 to 400 kg ha(-1). Soil water solution was sampled at five depths along the soil profile (from 0.3 to 1.5 m) at time intervals of 7-30 days using suction cups. Soil water content (SWC) was measured daily by TDR at the same depths of suction cups. Soil water NO3-N concentrations varied from 0 to 110 mg L-1, with the highest concentrations measured after fertilizer application. Once validated on measured SWC data, SWAP model was applied to estimate the drainage flux. Annual leaching was calculated by multiplying drainage flux by soil water NO3-N concentration. N Leaching ranged from 14 to 321 kg ha(-1) year(-1), according to fertilization, crop N removal, rainfall, irrigation management, and it was mainly affected by N surplus. (C) 2011 Elsevier B.V. All rights reserved.", "keywords": ["2. Zero hunger", "Intensive cropping system; Irrigation; Nitrate leaching; Nitrogen fertilization; Suction cup", "0401 agriculture", " forestry", " and fisheries", "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.2011.06.014"}, {"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.2011.06.014", "name": "item", "description": "10.1016/j.agee.2011.06.014", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2011.06.014"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-01-01T00:00:00Z"}}, {"id": "10.1016/j.ese.2020.100013", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:01Z", "type": "Journal Article", "created": "2020-01-13", "title": "Microbial electrochemistry for bioremediation", "description": "Lack of suitable electron donors or acceptors is in many cases the key reason for pollutants to persist in the environment. Externally supplementation of electron donors or acceptors is often difficult to control and/or involves chemical additions with limited lifespan, residue formation or other adverse side effects. Microbial electrochemistry has evolved very fast in the past years - this field relates to the study of electrochemical interactions between microorganisms and solid-state electron donors or acceptors. Current can be supplied in such so-called bioelectrochemical systems (BESs) at low voltage to provide or extract electrons in a very precise manner. A plethora of metabolisms can be linked to electrical current now, from metals reductions to denitrification and dechlorination. In this perspective, we provide an overview of the emerging applications of BES and derived technologies towards the bioremediation field and outline how this approach can be game changing.", "keywords": ["0301 basic medicine", "AUTOTROPHIC DENITRIFICATION", "elecetrobioremediation", "Bioremediaci\u00f3", "FUEL-CELLS", "Environmental technology. Sanitary engineering", "Microbial biotechnology", "01 natural sciences", "POLYCYCLIC AROMATIC-HYDROCARBONS", "03 medical and health sciences", "WASTE-WATER", "DECHLORINATION", "TD Environmental technology. Sanitary engineering", "Electrochemistry", "POLLUTANTS", "GE1-350", "TD1-1066", "0105 earth and related environmental sciences", "NITRATE-CONTAMINATED GROUNDWATER", "ENVIRONMENTAL REMEDIATION", "Q Science (General)", "QR Microbiology", "NITROGEN REMOVAL", "6. Clean water", "Environmental sciences", "Electroqu\u00edmica", "ORGANIC", "BIOELECTROCHEMICAL SYSTEMS", "13. Climate action", "Earth and Environmental Sciences", "Perspective", "Biotecnologia microbiana", "Bioremediation"]}, "links": [{"href": "https://iris.cnr.it/bitstream/20.500.14243/540323/1/1-s2.0-S2666498420300053-main.pdf"}, {"href": "https://doi.org/10.1016/j.ese.2020.100013"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20and%20Ecotechnology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.ese.2020.100013", "name": "item", "description": "10.1016/j.ese.2020.100013", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.ese.2020.100013"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-01-01T00:00:00Z"}}, {"id": "10.1016/j.apsoil.2007.12.011", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:34Z", "type": "Journal Article", "created": "2008-02-20", "title": "Changes In Soil Enzymes Related To C And N Cycle And In Soil C And N Content Under Prolonged Warming And Drought In A Mediterranean Shrubland", "description": "Open AccessPeer reviewed", "keywords": ["Soil protease", "2. Zero hunger", "13. Climate action", "Soil ammonium availability", "Soil \u03b2-glucosidase", "Climate change", "0401 agriculture", " forestry", " and fisheries", "Soil urease", "04 agricultural and veterinary sciences", "15. Life on land", "Soil nitrate availability", "6. Clean water"]}, "links": [{"href": "https://doi.org/10.1016/j.apsoil.2007.12.011"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Applied%20Soil%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.apsoil.2007.12.011", "name": "item", "description": "10.1016/j.apsoil.2007.12.011", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.apsoil.2007.12.011"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-06-01T00:00:00Z"}}, {"id": "10.1016/j.biortech.2005.04.016", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:41Z", "type": "Journal Article", "created": "2005-06-25", "title": "Influences Of Vermicomposts On Field Strawberries: Part 2. Effects On Soil Microbiological And Chemical Properties", "description": "The effects of applications of food waste and paper waste vermicomposts on some soil chemical and biological properties were evaluated in field plots planted with strawberries. Six-week old strawberries (Fragaria ananasa, var. Chandler) were transplanted into 4.5 m(2) raised beds under a plastic tunnel structure measuring 9.14 x 14.6 x 3.6 m. Vermicompost were applied at rates of 5 or 10 t ha(-1) supplemented with inorganic fertilizers to balance fertilizer recommendations for strawberries of 85-155-125 kg NPK ha(-1). Effects of vermicomposts on strawberry growth and yields have been reported previously [Arancon, N.Q., Edwards C.A., Bierman P., Welch, C., Metzger, J.D., 2004. The influence of vermicompost applications to strawberries: Part 1. Effects on growth and yield. Bioresource Technology 93:145-153]. Total extractable N, NH(4)-N, NO(3)-N and orthophosphates did not differ significantly between treatments, except on the last sampling date (harvest date) in which significantly greater amounts of NH(4)-N, NO(3)-N and orthophosphates (PPlants adapt to fluctuating environmental conditions by adjusting their metabolism and gene expression to maintain fitness1. In legumes, nitrogen homeostasis is maintained by balancing nitrogen acquired from soil resources with nitrogen fixation by symbiotic bacteria in root nodules2\uffe2\uff80\uff938. Here we show that zinc, an essential plant micronutrient, acts as an intracellular second messenger that connects environmental changes to transcription factor control of metabolic activity in root nodules. We identify a transcriptional regulator, FIXATION UNDER NITRATE (FUN), which acts as a sensor, with zinc controlling the transition between an inactive filamentous megastructure and an active transcriptional regulator. Lower zinc concentrations in the nodule, which we show occur in response to higher levels of soil nitrate, dissociates the filament and activates FUN. FUN then directly targets multiple pathways to initiate breakdown of the nodule. The zinc-dependent filamentation mechanism thus establishes a concentration readout to adapt nodule function to the environmental nitrogen conditions. In a wider perspective, these results have implications for understanding the roles of metal ions in integration of environmental signals with plant development and optimizing delivery of fixed nitrogen in legume crops.Abstract. The repeated application of pig slurry to agricultural soils may result in an accumulation of salts and a risk of aquifer pollution due to nitrate leaching and salinization. Under Mediterranean conditions, a field experiment on a sandy loam soil (Typic Xerofluvent) was performed with maize (Zea mays) in 1998, 1999 and 2001 to study the effects of applying optimal (P1) and excessive rates (P3) of pig slurry on soil salinization, nitrate leaching and groundwater pollution. The rate of pig slurry was established considering the optimal N rate for maize in this soil (170, 162 and 176 kg N ha\uffe2\uff88\uff921 for 1998, 1999 and 2001, respectively). Pig slurry treatments were compared to an optimal N rate supplied as urea (U) and a control treatment without N fertilizer (P0). The composition of the slurries showed great variability between years. Mean NO3\uffe2\uff88\uff92 leaching losses from 1998 to 2001 were 329, 215, 173 and 78 kg N ha\uffe2\uff88\uff921 for P3, P1, U and P0 treatments, respectively. The amount of total dissolved salts (TDS) added to the soil in slurry application between 1998 and 2001 was 2019 kg TDS ha\uffe2\uff88\uff921 for the P1 treatment and 6058 kg TDS ha\uffe2\uff88\uff921 for the P3 treatment. As a consequence, the electrical conductivity (EC) of the slurry\uffe2\uff80\uff90treated soils was greater than that of the control soil. The EC correlated significantly with the sodium concentration of the soil solution. Over the entire experimental period, 2653, 2202 and 2110 kg Na ha\uffe2\uff88\uff921 entered the aquifer from the P3, P1 and P0 treatments, respectively. The P3 treatment did not significantly increase grain production in 1999 and 2001 compared with that achieved with the optimal N rate treatment (P1). This behaviour shows the importance of establishing application guidelines for pig slurry that will reduce the risk of soil and groundwater pollution.
", "keywords": ["2. Zero hunger", "Soil salinity", "04 agricultural and veterinary sciences", "15. Life on land", "Nitrate", "01 natural sciences", "6. Clean water", "Maize", "13. Climate action", "Leaching", "0401 agriculture", " forestry", " and fisheries", "Aquifer pollution", "Irrigation", "Pig slurry", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1111/j.1475-2743.2004.tb00395.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Use%20and%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1475-2743.2004.tb00395.x", "name": "item", "description": "10.1111/j.1475-2743.2004.tb00395.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1475-2743.2004.tb00395.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-12-01T00:00:00Z"}}, {"id": "10.1038/srep14378", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:17:39Z", "type": "Journal Article", "created": "2015-09-23", "title": "Effects Of Nitrogen And Phosphorus Additions On Soil Microbial Biomass And Community Structure In Two Reforested Tropical Forests", "description": "AbstractElevated nitrogen (N) deposition may aggravate phosphorus (P) deficiency in forests in the warm humid regions of China. To our knowledge, the interactive effects of long-term N deposition and P availability on soil microorganisms in tropical replanted forests remain unclear. We conducted an N and P manipulation experiment with four treatments: control, N addition (15\uffe2\uff80\uff89g N m\uffe2\uff88\uff922\uffc2\uffb7yr\uffe2\uff88\uff921), P addition (15\uffe2\uff80\uff89g P m\uffe2\uff88\uff922\uffc2\uffb7yr\uffe2\uff88\uff921) and N and P addition (15\uffe2\uff80\uff89+\uffe2\uff80\uff8915\uffe2\uff80\uff89g N and P m\uffe2\uff88\uff922\uffc2\uffb7yr\uffe2\uff88\uff921, respectively) in disturbed (planted pine forest with recent harvests of understory vegetation and litter) and rehabilitated (planted with pine, but mixed with broadleaf returning by natural succession) forests in southern China. Nitrogen addition did not significantly affect soil microbial biomass, but significantly decreased the abundance of gram-negative bacteria PLFAs in both forest types. Microbial biomass increased significantly after P addition in the disturbed forest but not in the rehabilitated forest. No interactions between N and P additions on soil microorganisms were observed in either forest type. Our results suggest that microbial growth in replanted forests of southern China may be limited by P rather than by N and this P limitation may be greater in disturbed forests.
", "keywords": ["China", "Principal Component Analysis", "Nitrates", "Rainforest", "Nitrogen", "Microbiota", "Fatty Acids", "Forestry", "Phosphorus", "04 agricultural and veterinary sciences", "15. Life on land", "Gram-Positive Bacteria", "Article", "Carbon Cycle", "Phosphates", "Multidisciplinary Sciences", "Soil", "Gram-Negative Bacteria", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Fertilizers", "Ecosystem", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1038/srep14378"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Scientific%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/srep14378", "name": "item", "description": "10.1038/srep14378", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/srep14378"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-09-23T00:00:00Z"}}, {"id": "10.1038/srep42247", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:17:40Z", "type": "Journal Article", "created": "2017-02-08", "title": "Nitrate Leaching In A Winter Wheat-Summer Maize Rotation On A Calcareous Soil As Affected By Nitrogen And Straw Management", "description": "AbstractNitrate leaching is one of the most important pathways of nitrogen (N) loss which leads to groundwater contamination or surface water eutrophication. Clarifying the rates, controlling factors and characteristics of nitrate leaching is the pre-requisite for proposing effective mitigation strategies. We investigated the effects of interactions among chemical N fertilizer, straw and manure applications on nitrogen leaching in an intensively managed calcareous Fluvo-aquic soil with winter wheat-summer maize cropping rotations on the North China Plain from October 2010 to September 2013 using ceramic suction cups and seepage water calculations based on a long-term field experiment. Annual nitrate leaching reached 38\uffe2\uff80\uff9360\uffe2\uff80\uff89kg\uffe2\uff80\uff89N ha\uffe2\uff88\uff921 from conventional N managements, but declined by 32\uffe2\uff80\uff9371% due to optimum N, compost manure or municipal waste treatments, respectively. Nitrate leaching concentrated in the summer maize season, and fewer leaching events with high amounts are the characteristics of nitrate leaching in this region. Overuse of chemical N fertilizers, high net mineralization and nitrification, together with predominance of rainfall in the summer season with light soil texture are the main controlling factors responsible for the high nitrate leaching loss in this soil-crop-climatic system.
", "keywords": ["2. Zero hunger", "Agricultural Irrigation", "Nitrates", "Nitrogen", "Rain", "Agriculture", "04 agricultural and veterinary sciences", "15. Life on land", "Zea mays", "Article", "6. Clean water", "Soil", "13. Climate action", "Regression Analysis", "0401 agriculture", " forestry", " and fisheries", "Seasons", "Fertilizers", "Triticum"]}, "links": [{"href": "https://doi.org/10.1038/srep42247"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Scientific%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/srep42247", "name": "item", "description": "10.1038/srep42247", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/srep42247"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-02-08T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=nitrate&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=nitrate&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=nitrate&", "hreflang": "en-US"}, {"rel": "next", "type": "application/geo+json", "title": "items (next)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=nitrate&offset=50", "hreflang": "en-US"}], "numberMatched": 165, "numberReturned": 50, "distributedFeatures": [], "timeStamp": "2026-05-24T23:09:50.517029Z"}