<http://webisa.webdatacommons.org/453173028>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<confex.com> .
<http://webisa.webdatacommons.org/prov/472747505>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/453173028> .
<http://webisa.webdatacommons.org/453173028>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/453173028>	<http://www.w3.org/ns/prov#value>	"There have been significant changes in soil Ca, N and some other nutrients over time, however the differences among the treatments have been less than we had hypothesized." .