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Fig. 20. A new John Deere 9760 level-land combine with 10-m header unloads wheat on the go near Ritzville, WA, in July 2006. The grain yield of soft white winter wheat in this field averaged 3220 kg ha–1. The combine operated at a speed of 8 km h–1 and harvested 6.7 ha h–1. Farm machinery costs have skyrocketed in recent decades. This combine was rented from an equipment dealer for $150 separator h–1. The price of a new machine is $250,000. Photo by Derek Schafer.
