PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • At this level, polyvalent cations, such as iron, aluminum and calcium serve as bridges between the predominantly negatively charged clays and organic matter (Edwards and Bremner 1967).
http://www.w3.org/ns/prov#wasQuotedFrom
  • certifiedorganic.bc.ca