What are these circles?

Question

This is a picture taken at 35000 feet on a flight from las vegas to chicago.You can see it by clicking the following link

http://www.flickr.com/photos/13533465@N02/

Anybody know what they are. They went on for hundreds of miles

Answer 1

My curiosity too will get me back here again today??????

Answer 2

It's actually a method in which to grow crops. The circle is a result of the irrigation pattern, the water is distributed in a circular fashion, creating the circle growth pattern

Answer 3

Hello,

(ans) I would suggest that these circular formations are either :-

a) crop circles (doubtful)

b) Test crops (doubtful)

c) Most likely I think is, Test sites for aggro chemicals or aggro pesticides.

Ivan