Irrigated fields. Check out Land -> Farms for several other shots of such things, as well as explanations.
Anonymous
@ 2005-07-12 13:47:06
Those are crops planted in circular patterns to be more effictive, they put a water system in the center that way they wont waste water or fertilizer etc.
Anonymous
@ 2005-07-12 14:14:21
I suppose that these are culture fields circulars. It allows one better irrigation of lands.
Jorge Almeida
Anonymous
@ 2005-07-12 15:09:10
These are crop fields irrigated by a center-pivot sprinkler system. A long row of sprinklers on motorized wheels slowly rotates as the sprinklers operate. It's a means of irrigating a large field without having to manually move a row of sprinklers. These are often used for growing corn. There are some high detail images of these type of fields here.
This is outside of Pasco, Washingtont (where I live)
Farms - Irrigation Circles 
Jorge Almeida
This is outside of Pasco, Washingtont (where I live)
http://maps.google.com/maps?q=grandview,+wa&ll=46.290207,-119.198914&spn=0.337246,0.468361&t=k&hl=en
Dulce, NM is 75 miles east. It is the seat of government for the Jicarilla Apache Tribe. The nearest Navajo city is Shiprock.