Wheat ripens for harvesting during June and July in this area. Before that time comes, farmers and their families will be getting the combines, trucks, and farm grain bins ready for the big event. They hope for hot, dry weather during the harvest season for the grain threshes and tests best under those conditions. A round is one time around any field. At this time, the farmer gets an idea what his crop yield will be.
Wheat is a pretty crop at any stage but especially at the time of harvest.
Combines have evolved through the years from those pulled by a tractor to self-propelled units such as you see here.