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    <gcmd:termsOfUse>https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf</gcmd:termsOfUse>
    <gcmd:keywordVersion>23.6</gcmd:keywordVersion>
    <gcmd:schemeVersion>2026-03-19T10:41:57.720Z</gcmd:schemeVersion>
    <gcmd:viewer>https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/9015e65f-bbae-4855-a4b6-1bfa601752bd</gcmd:viewer>
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    <skos:broader rdf:resource="233a4d81-44f8-4b0e-8ad3-695f641729f8"/>
    <skos:prefLabel xml:lang="en">BIOGEOCHEMICAL CYCLES</skos:prefLabel>
    <gcmd:reference gcmd:text="Allaby, Michael. 1998. A Dictionary of Ecology.  Oxford University Press. Oxford, New York." xml:lang="en"/>
    <skos:definition xml:lang="en">A Biogeochemical cycle is the movement of chemical elements from organismto physical environment to organism in more or less circularpathways.</skos:definition>
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