<http://webisa.webdatacommons.org/16897029>	<http://www.w3.org/ns/prov#value>	"In order to bond the nitrate from urea with Hs, the process needs cation, i.e. calcium to bridge functional humic group and ion nitrate." .
<http://webisa.webdatacommons.org/prov/267591569>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/16897029> .
<http://webisa.webdatacommons.org/16897029>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<blogspot.com> .
<http://webisa.webdatacommons.org/16897029>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .