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tractor. We saw the lowest yields on the west end due to the load that the tractors were carrying as they started into the pass. Similarly we saw a decreased yield on the east end of the field as the tractor would slow and start loading the weight onto the tractor. The ends exhibited larger differences between the two tractors. The middle still showed a difference and we predicted that we would see the wheel tractor pass yield 5.7 bu./ac less than the track tractor in that area. We harvested every eight rows of each of the tractors.
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