@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix isothes: <http://purl.org/iso25964/skos-thes#> .

<https://concepts.sagepub.com/social-science/concept/humic_substances>
  skos:definition "Major components of the organic matter in soil and water as well as in geological organic deposits such as lacustrine sediments, peat and shale. In soils, humic substances are derived from humus following the decay and transformation of plant remains (humification) and are a significant part of the carbon content of soils. [Source: <a href=\"https://sk.sagepub.com/reference/dictionaryenvirochange/n1930.i1.xml\" target=\"_blank\" data-id=\"to-sk\">Encyclopedia of Environmental Change; humic substances</a>]"@en ;
  skos:exactMatch <https://id.nlm.nih.gov/mesh/D006812.html> ;
  skos:broader <https://concepts.sagepub.com/social-science/concept/soil> ;
  skos:prefLabel "humic substances"@en ;
  a skos:Concept .

<https://concepts.sagepub.com/social-science/concept/conceptgroup/concepts>
  a skos:Collection, isothes:ConceptGroup ;
  skos:prefLabel "concepts"@en ;
  skos:member <https://concepts.sagepub.com/social-science/concept/humic_substances> .

<https://concepts.sagepub.com/social-science/concept/soil>
  skos:prefLabel "soil"@en ;
  a skos:Concept ;
  skos:narrower <https://concepts.sagepub.com/social-science/concept/humic_substances> .