Disc openers play a critical role by cutting into the soil to get your corn crop planted.
"We’re trying to create that true ‘V’ trench in order to give a spot for us to drop a seed down in the bottom of that trench," Farm Journal associate field agronomist Missy Bauer tells Corn College TV Season 3.
While the diameter of disc-opener blades depends on the model, most are 15" or 14" in diameter when new and should be replaced after a ½" of wear occurs. A simple test can then ensure the blades are creating enough contact, per manufacturer guidelines, to open "V" trenches.
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"We take a business card, we slide one in from the bottom. We take another card and we slide it in from the top. Where these two cards don’t slide together anymore, that’s what we call the point of contact," Bauer says. "Then we’ll go ahead and we’ll take a measurement of that point of contact to see where it’s at."
To adjust the point of contact, shims can be moved around as needed. Other components to review are gauge wheels, which should fit snugly against disc-opener blades, seed tubes, seed-tube guards and seed firmers.
Learn more in Episode 1 of Corn College TV Season 3: