"No place is boring if you have your camera with you."
The green strip of grass is most likely a water source. Some US farmer conserve the land by ploughing up to a buffered zone. Sometimes they are required to maintain a natural waterway. Over the years some have tiled their property to drain more efficiently and may have eliminated the low area runoff. These are guesses of course.
I was thinking along the same lines as you. It makes sense.
Hmmmm...now how did that happen?
It's a river of grass : neat water. ;)