About: http://webisa.webdatacommons.org/234171611

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, amounts of zinc, copper and other ions leached at pH 5 and 7 were small or could not be detected.
http://www.w3.org/ns/prov#wasQuotedFrom	usda.gov