About: http://webisa.webdatacommons.org/19710217

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	Note that ideally, this test should be done when soils are not frozen and when groundwater levels may be highest, such as in the spring.
http://www.w3.org/ns/prov#wasQuotedFrom	oregonstate.edu