Disc harrows - also known as plate harrows - are machinery frequently used in agriculture. In contrast to conventional harrows, a disc harrow has curved discs, which rotate in the direction of travel and thus rough up the ground. At the same time, two or four counter-rotating disc beams run together in parallel. The discs themselves are serrated at the front and smooth at the back. Just like the grubbers, the field of application of the disc harrow is farmland. With rotating rollers, disc harrows are also suitable for especially hard and difficult soils.

The basic requirement needed to be able to use the disc harrow problem-free, is weed-free ground. With the disc harrow, weeding or the spreading of manure is easy to implement. As well as this, disc harrows have the advantage that during the harvest, corn that has fallen off the combine harvester is more quickly caused to germinate. Along with the tooth harrows, the disc harrow also belongs to the harrows without motors. It is consequently pulled over the ground and driven by a towing vehicle without a power take off.