<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:gcmd="https://gcmd.earthdata.nasa.gov/kms#" xmlns:dcterms="http://purl.org/dc/terms/" xml:base="https://gcmd.earthdata.nasa.gov/kms/concept/">
  <gcmd:gcmd>
    <gcmd:termsOfUse>https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf</gcmd:termsOfUse>
    <gcmd:keywordVersion>23.7</gcmd:keywordVersion>
    <gcmd:schemeVersion>2026-04-15T10:53:30.610Z</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/7a33a978-8ef6-4313-b489-c06cfc6d9cec</gcmd:viewer>
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  <skos:Concept rdf:about="7a33a978-8ef6-4313-b489-c06cfc6d9cec">
    <skos:broader rdf:resource="233a4d81-44f8-4b0e-8ad3-695f641729f8"/>
    <skos:prefLabel xml:lang="en">NUTRIENT CYCLING</skos:prefLabel>
    <gcmd:reference gcmd:text="Nebel, Bernard J.and Richard T. Wright. Environmental Science-the Way the World Works. 1998. Prentice-Hall, Inc. Upper Saddle River, New Jersey." xml:lang="en"/>
    <skos:definition xml:lang="en">Nutrient cycling is the repeated pathway of particular nutrients orelements from the environment through one or more organisms back to theenvironment.  Nutrient cycles include the carbon cycle, the nitrogencycle, the phosphorus cycle, and so on.</skos:definition>
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