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harrow, farm implement used to pulverize soil, break up crop residues, uproot weeds, and cover seed. In Neolithic times, soil was harrowed, or cultivated, with tree branches; shaped wooden harrows were used by the Egyptians and other ancient peoples, and the Romans made harrows with iron teeth.
Modern harrows comprise several varieties. Disk harrows mount concave disks and are frequently referred to simply as disks. One type, the single-action two gang, has two groups of disks, more or less h
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