About: http://webisa.webdatacommons.org/442493555

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	Determining pH pH is not constant in soil or water, but varies on a seasonal or even daily basis due to factors such as rainfall, biological growth within the soil, and temperature changes.
http://www.w3.org/ns/prov#wasQuotedFrom	kids.net.au