@prefix pp: . @prefix metadata: . @prefix eol: . @prefix owl: . @prefix cos: . @prefix skos: . @prefix lexinfo: . @prefix vivo-inra: . @prefix ms2o: . @prefix xml: . @prefix dcterms: . @prefix vann: . @prefix pan: . @prefix prism: . @prefix foaf: . @prefix ontology: . @prefix void: . @prefix pav: . @prefix inra: . @prefix snomed: . @prefix ado: . @prefix onto: . @prefix core: . @prefix wto: . @prefix status: . @prefix schema: . @prefix obol: . @prefix owl2xml: . @prefix xsd: . @prefix rdfs: . @prefix fp: . @prefix ncbitaxon: . @prefix omv: . @prefix dcat: . @prefix kg: . @prefix sp: . @prefix prov: . @prefix eng: . @prefix cc: . @prefix st: . @prefix oboInOwl: . @prefix skosxl: . @prefix cw: . @prefix thviande: . @prefix rdf: . @prefix insee: . @prefix plp: . @prefix bibo: . @prefix thesaurusINRAE: . @prefix tp: . @prefix atol: . @prefix dc: . rdfs:label "RDF description of c3_2500" ; foaf:primaryTopic . skos:narrower . skos:broader . rdf:type skos:Concept ; status:hasStatus "Published"^^xsd:string ; dcterms:modified "2020-05-04T16:35:19.373+02:00"^^xsd:dateTime ; skos:broader ; skos:definition , "The process by which ammonia compounds, including man-made fertilizer and the humus provided by organic matter or plant and animal origin, are converted into nitrites and then nitrates, which are then absorbed as a nutrient by crops. Excess nitrate can be leached into surface waters and groundwaters, causing pollution. Excess nitrate may also be converted by microbes back into gaseous nitrogen, which is an important greenhouse gas, and released back into the atmosphere. The ultimate source of nitrogen in the ecosystem is the molecular nitrogen in the atmosphere. To a very limited extent, some dissolves in water. However, none is found in rock."@en ; skos:exactMatch , ; skos:inScheme ; skos:narrower ; skos:prefLabel "nitrification"@fr , "nitrification"@en .