PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In some cotton production regions, where soil erosion is a problem, conservation tillage is used.??? In this system, crop residue from the previous crop or a cover crop is left on the soil surface to protect the soil from heavy rains and winds.??? A special planter is used to open the soil and place the seed without disturbing the protective cover.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cottonsjourney.com