Larger discs sure do look menacing. They also require far more horsepower to pull, but they wear out more slowly than smaller-diameter discs. But there are two very important considerations when choosing planter disc size. The first is trash management (guess which one cuts through straw better? You may be surprised) and the second is the amount of downward force required to keep that disc in the ground at a uniform, consistent depth.
In this video, Phil Needham, of Needham Ag Technologies, walks us through the how and why different disc sizes matter when aiming for optimum wheat planting depth.
If you cannot see the embedded video below click here.