| http://www.w3.org/ns/prov#value | - wheat, rice, and other grasses ??? ??? ??? Colombian Exchange the transfer of plants, animals, and diseases between the Americas and Europe, Asia, and Africa ??? ??? ??? commercial agriculture term used to describe large scale farming and ranching operations that employ vast land bases, large mechanized equipment, factory-type labor fores, and the latest technoloty ??? ??? ??? desertification the
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