Harrows 6 are used to smoothi? plowed land" and sometimes to cover seeds
The 20disk harrow which has curved, sharp- and fertilizer with earth.
edged steel disks, is used mainly to cut up crop residues before planting and to bury weeds during seedbed preparation
pike-tooth harrows are used to smooth and level" the soil directly after plowing.
They stir" he soil to a depth of about 5 cm.