<http://webisa.webdatacommons.org/305543941> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/305543941> <http://www.w3.org/ns/prov#wasQuotedFrom> <sciencedaily.com> . <http://webisa.webdatacommons.org/305543941> <http://www.w3.org/ns/prov#value> "The difference varies widely across crop types and species, however." . <http://webisa.webdatacommons.org/prov/72410433> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/305543941> .