Below - one pivot, this crop looks like corn. Some of the dark blotches in the back are lakes, others are cloud shadows.
Below - 6 pivots all together. There is a car or truck on the road, that little dark splotch before the "Y" on the road. A pivot is an irrigation system, with a well in the center and a huge spraying contraptions that move in circles, irrigating the various crops. These might be corn.
The "Sandhills" cover large areas east of my home. Fields appear pockparked with humps and hills, many sprinkled with cattle, deer, some antelope. From the air, we can see huge farms and ranches, waaaay off from main roads. Large amounts of land is necessary for cattle. Farms/ranches of 100,000 acres is not unusual.
Below is my town, Alliance.