When the edge of the discs is on the inside you will create a stronger edge that will allow the disc to penetrate hard soil more easily. If the disc's edge is on the outside, you will get a sharper edge, which will allow you to work faster. Notches in the discs will help pulp vegetable residues.
Did you know...? | Disc Harrow
Interesting questions about Disc Harrow
Disc Harrow, did you know?
Disc HarrowDid you know that an inside edge of the discs is recommended for hard soils?
Disc HarrowDid you know that fast harrows may substitute mouldboard ploughs?
Disc HarrowDid you know that the working depth for a disc harrow is slightly shallower than a third of the diameter of the disc?