About: http://webisa.webdatacommons.org/113818607

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	However productivity is limited by many factors such as drought, salinity and subsoil constraints including boron toxicity.
http://www.w3.org/ns/prov#wasQuotedFrom	science20.com