During our August 2002 visit to Nebraska, my mother and I spent quite a bit of time commuting between Ogallala (where our motel was located) and Grant and Madrid. Grant is located 20 miles south of Ogallala and Madrid is 10 miles east of Grant.
There is literally nothing but farmland between Ogallala and Grant. Several farmers are growing sunflowers as a cash crop. Some of the fields were located along the highway. I stopped and snapped several photos of the flowers including this closeup.