About: http://webisa.webdatacommons.org/5460463

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	However, other essential elements, such as phosphorus, nitrogen, iron, and manganese, will take more time, perhaps even decades to return to a natural state.
http://www.w3.org/ns/prov#wasQuotedFrom	usgs.gov