Freigericht, Germany - August 18, 2011: Rear view of a Claas combine harvester moves through a mowed field. He goes to the next harvest field. Because of high temperatures on the day the combine harvesters often go late into the night across the fields. This combine can be used for, rye, wheat, barley, canola, corn and hay. The company Claas is one of well-known German manufacturer of agricultural machinery. The Claas combine is the most common form of silage harvester in the world and has been in production since 1973.