PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Nitrogen is a major component of important cellular elements, including proteins, nucleic acids, and cell walls, and has been shown to regulate a multitude of primary and secondary cellular processes and is often the most costly component of the production medium.
http://www.w3.org/ns/prov#wasQuotedFrom
  • usda.gov