About: http://webisa.webdatacommons.org/138643830

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	Phosphorus, potassium and other trace elements in inorganic fertilizers are often mined from the earth.
http://www.w3.org/ns/prov#wasQuotedFrom	sfgate.com