1.disk, rotary, chisel, and subsoil plows

2.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.

3.farm machinery, mechanical devices,

including tractors and implements,

used in farming to save labour. Farm machines include a great variety of devices with a wide range of complexity: from simple hand-held implements used since prehistoric times to the complex harvesters of modern mechanized agriculture.

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