{"type": "FeatureCollection", "features": [{"id": "10.1029/2007gb003168", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:16:40Z", "type": "Journal Article", "created": "2009-04-03", "title": "Grazing Effects On Belowground C And N Stocks Along A Network Of Cattle Exclosures In Temperate And Subtropical Grasslands Of South America", "description": "<p>We evaluated the effects of grazing on C and N belowground pools by comparing 15 grazing\uffe2\uff80\uff90exclosure pairs across the R\uffc3\uffado de la Plata grasslands of Uruguay and Argentina. We measured C and N pools of belowground biomass, particulate organic matter (POM), and the mineral associated organic matter (MAOM) in the top meter of the soil. Grazing exclusion in the R\uffc3\uffado de la Plata grasslands promoted (1) decreased belowground biomass stocks across all sites, (2) increased soil organic carbon (SOC) and soil organic nitrogen (SON) stocks in upland soils, and (3) decreased stocks in shallow and lowland soils. In all cases, SOC and SON variations were largely derived by changes in MAOM stocks that maintained their C:N ratios unchanged. In contrast, stocks of the labile POM fractions changed little, but C:N ratios of these fractions decreased after grazing removal. We hypothesize that changes in soil organic matter (SOM) contents between grazed and ungrazed stands result from the balance between changes in belowground N allocation patterns (root N retention hypothesis) and the ability of the soil to retain the extra N available after the exclusion of herbivores and the cessation of volatilization and leaching from urine and dung patches (N loss hypothesis). On the basis of our results we suggest that the relative importance of these two cooccurring mechanisms will shape grazing effects on SOM stocks, depending on soil properties, including texture, pH and soil depth, and vegetation type, particularly allocation patterns and C:N ratios of different plant species.</p>", "keywords": ["2. Zero hunger", "ARGENTINA", "GRAZING", "AGRICULTURE", "SOIL SCIENCES", "SOIL ORGANIC MATTER", "RANGE MANAGEMENT", "04 agricultural and veterinary sciences", "15. Life on land", "carbono", "pastoreo", "nitrogeno", "13. Climate action", "URUGUAY", "gradientes", "https://purl.org/becyt/ford/4.1", "0401 agriculture", " forestry", " and fisheries", "https://purl.org/becyt/ford/4", "GRASSLANDS", "AGROCHEMICALS"]}, "links": [{"href": "https://doi.org/10.1029/2007gb003168"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Biogeochemical%20Cycles", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1029/2007gb003168", "name": "item", "description": "10.1029/2007gb003168", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1029/2007gb003168"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-04-04T00:00:00Z"}}, {"id": "10.4067/s0718-58392010000200007", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:19:39Z", "type": "Journal Article", "created": "2010-12-27", "description": "Chilean livestock production systems have intensified over the last years, with increasing amounts of N fertilizer inputs creating the potentiality for environmental damage through N pollution of water and air, so that alternative production strategies have been developed to reduce such environmental impacts. This study assesses N losses under different grazing frequencies and intensities on permanent pasture (Lolium perenne L., Festuca arundinacea Schreb., Dactylis glomerata L., and Trifolium repens L.) on an Andisol in Southern Chile. Four grazing strategies were evaluated: frequent-heavy (FH), frequent-light (FL), infrequent-heavy (IH), infrequent-light (IL), and a no grazing control (C) treatment, and each with three replicates in a randomized complete block design. Results of the experiment indicate that N leaching losses were greater in the FH treatment (58.7 kg available N ha -1 ; p < 0.05) and with most of the leaching occurring in spring (39%). On average, N ammonia (NH3) losses were 10% greater in the frequent grazing treatments in relation to the infrequent grazing treatments, since there were no significant differences (P \u2264 0.05) among individual grazing events for FH, FL and IH. Results indicate that grazing frequency affects leaching losses while grazing intensity affects ammonia emissions from the grassland. Grazing with dairy cows in Southern Chile should consider this environmental constraint to ensure sustainable production over time.", "keywords": ["lixiviaci\u00f3n", "04 agricultural and veterinary sciences", "amonio", "pastoreo", "01 natural sciences", "ammonium", "leaching", "nitrate", "0401 agriculture", " forestry", " and fisheries", "grazing", "NH3 volatilization", "volatilizaci\u00f3n de amoniaco", "nitrato", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.4067/s0718-58392010000200007"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Chilean%20journal%20of%20agricultural%20research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.4067/s0718-58392010000200007", "name": "item", "description": "10.4067/s0718-58392010000200007", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.4067/s0718-58392010000200007"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-06-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=pastoreo&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=pastoreo&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=pastoreo&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=pastoreo&offset=2", "hreflang": "en-US"}], "numberMatched": 2, "numberReturned": 2, "distributedFeatures": [], "timeStamp": "2026-09-22T01:00:24.147891Z"}