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<http://webisa.webdatacommons.org/229068891>	<http://www.w3.org/ns/prov#value>	"Hardpan keeps salts and other toxins from leaching downward while preventing domestic plants from reaching lower soil nutrients." .
<http://webisa.webdatacommons.org/229068891>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<motherearthnews.com> .
<http://webisa.webdatacommons.org/prov/91908374>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/229068891> .