About: http://webisa.webdatacommons.org/380021167

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	Variable costs such as fertilizers, seeds, and herbicides were $170 per acre for the conservation system and $163 per acre for the conventional system.
http://www.w3.org/ns/prov#wasQuotedFrom	ncat.org