About: http://webisa.webdatacommons.org/148231650

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	Between 1948 and 2009, U.S. agricultural output rose 170 percent, but the aggregate of total inputs used in agriculture, such as land, labor, capital, and intermediate inputs like seed and fertilizer, has remained essentially unchanged.
http://www.w3.org/ns/prov#wasQuotedFrom	usablenet.com