About: http://webisa.webdatacommons.org/404035576

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	As the nitrogen sources, ammonia, ammonium salts, such as ammonium sulfate, ammonium carbonate, ammonium chloride, ammonium phosphates and ammonium acetate, and nitrates can be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com