About: http://webisa.webdatacommons.org/85530447

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	The reduction is mainly because the cooling brought about a shortening of the growing season and a reduction of available land for cultivation.
http://www.w3.org/ns/prov#wasQuotedFrom	nih.gov