About: http://webisa.webdatacommons.org/179088054

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	The most important components of any fertilizer are nitrogen, phosphorus, and potassium, usually denoted by their chemical symbols of N, P, and K. Most fertilizers also contain calcium, sulfur, magnesium, and other trace elements.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.com