About: http://webisa.webdatacommons.org/217642437

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 a result, some agricultural soils have arsenic concentrations in excess of 100 ppm, but most studies suggest that this arsenic is confined to the topsoil.
http://www.w3.org/ns/prov#wasQuotedFrom	wisc.edu