About: http://webisa.webdatacommons.org/259779466

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	Nitrogen is a critical nutrient that is generally used and reused by plants within natural ecosystems, with minimal ???leakage??? into surface or ground water, where nitrogen concentrations remain very low (Vitousek et al., 2002).
http://www.w3.org/ns/prov#wasQuotedFrom	epa.gov