1775 M. Culley in M. Culley & G. Culley (2002) 171 He likewise shewd me a double mould board plough.]
1859 3 366 A bull-tongue or shovel plow put to the same depth, will raise better corn than a mouldboard plow.
1971 Mar. 31/1 There is a definite place for machines of this type to replace the mouldboard plough under certain circumstances.