One of the first things to touch excessive penetration into the canopy can the crop is the reel. While the knock grain out and cause front losses, purpose of the reel is to lightly The rule of thumb is to have the reel touch the top tip of the crop fingers extended into the crop by just and bend it toward the table as it is cut, 50mm at the point where the knife is cutting it. Any more than this and grain can be knocked out of the head or pods before the plant is cut.
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