Price: 700 € Working width: 3 m Required power: 10 hp Working speed: 14 km/h Old cambridge roller, either for use directly behind a tractor to roll sown fields, or to attach to a power harrow or cultivator for better soil compaction to prevent the ground from drying out. When attached to the hitch of a power harrow, more caution might be required if the machine is set to lift too high.