On May 30, 12:36*pm, "C-FFKQ (42)" wrote:
On Tuesday, May 29, 2012 4:33:09 PM UTC-4, Frank Whiteley wrote:
http://www.youtube.com/watch?v=aeOKjjaMCP0

Dumb question for today:
At around 2 minutes, there are rectangular fields with green circles... why are the crops planted in circles instead of using the full field?

-John (who's only ever seen crops filling the field area)

In the more arid areas of the US, long sprinkler pipes on wheels very
slowly roll around the field in a huge circle.
They are anchored at the middle of the circle and the water is pumped
in at that point. I'm not sure,
but I think maybe the water flow drives the wheels through some kind
of turbine and gearbox. I always
wondered about that part.