About: http://webisa.webdatacommons.org/192818737

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	When corn follows legumes, such as alfalfa and soybeans, at least part of the rotation effect is caused from the atmospheric nitrogen fixed by the legume crop and left in the soil.
http://www.w3.org/ns/prov#wasQuotedFrom	usda.gov