KKSH-6 ring rink, Novy, Poltava region.

Kalchato rink-spur KKSH-6 for soil compaction before and after sowing. When rolling the soil before sowing, the roller flattens the surface of the field, breaks the lumps and compacts the too loose soil.
(//tractor-service.com)
Pre-sowing rolling is done to retain moisture in the soil, grind large clods of earth and partially level the field surface, as well as to compact settled, late-processed soil, which is especially necessary before sowing agricultural crops. This operation reduces the slipping and sinking of the support-drive wheels of the seeder, which increases the uniformity of sowing and stabilizes the depth of planting seeds.

Post-sowing rolling of the KKSH-6 is a necessary operation for moisture retention and ensuring contact of seeds with the soil.