The disk blade slices through residue without plugging. Plus, you retain a consistent depth, without wandering. Choice of blades. Solid or cutout spherical blades as well as solid cone blades are available to match your disking conditions and needs. See your John Deere dealer for advice on blade type, size, and edge.
Tapered blades smooth out the soil.
Progressively smaller blades on the outside rear gangs reduce ridges and blend one pass into the previous one. Add optional finishing blades to the furrow filler to further feather the soil. You also get a one-blade taper on the outside of the front gangs. Match weight per blade to your power and conditions. A 650 Disk offers from 167 to 207 pounds per blade.