String shafts.
These shafts consist of steel wire strings or flat steel bars attached to several discs. Due to their low weight, these rollers only slightly compact the soil, but thanks to the strings, they crush its top layer well. After the passage of such a shaft, a thin one is formed, a well-fragmented layer of the roll, under which there is a slightly compressed layer. The string rollers prepare the soil particularly well for the point sowing of beetroots.