1871 2nd Ser. 7 578 The..‘disc’ plough, as it is commonly called..bringing up soil that probably never saw the sun before.
1907 L. H. Bailey I. 385 The revolving disc harrow or plow, with its concave discs moving obliquely through the soil.
2006 Nov. 72/1 He was still pulling a disk plow across the moist, untamped earth.