disk harrow

A disk harrow, often simply called a disk, is a farm implement used to break up plowed or rough land. It features concave disks arranged at an angle to the direction of draft, which pulverize soil, break up crop residues, and uproot weeds.12

Historically, harrows evolved from simple tree branches used in Neolithic times to iron-toothed implements used by the Romans. Modern disk harrows can be single-action, tandem, or offset, and are typically pulled by a tractor. They are a form of secondary tillage, a mechanical process to prepare soil for planting by altering its structure, managing residues, and controlling weeds.13