Our disk is a 90 cell plastic disk with a mechanical knock-out wheel. The disk uses vacuum to suck the seed to it, then it rotates and drops the seed down a seed tube into the ground. The knock-out wheel rolls on the suction side of the disk to poke out any stuck canola seeds or debris that may get caught in the holes. It’s similar to John Deere’s sugar beet or sorghum disk and knock-out.
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