<http://schema.org/about>
"Chook is Australian slang for a chicken. Chook tractors have long been a part of permaculture lore. Basically they are portable chook pens with open bases. Chickens scratch away at the ground (like a mini tractor), munching on grubs, bugs, seeds, and"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/green-food/chook-tractors-permacultureatms-alternative-to-a-free-rangeatm.html>