Clarence Herbert Smith (10 August 1855 in Alma, Victoria — 25 July 1901 in Ardrossan, South Australia) was an Australian agriculturalist, engineer, blacksmith and inventor.

The South Australian government had offered a reward of £200 to anyone who could develop an effective mechanical stump puller due to frustration with lack of productivity efficiency on its farms with current equipment.

The plough consisted of a number of hinged shares (originally three): when the blade encountered an underground obstacle, it would rise out of the ground.

C. H. Smith established a factory in Ardrossan, South Australia in 1880, and started producing ploughs.

R. B. Smith was later credited as the inventor of the design by the Parliament of South Australia in 1882, however C. H. continued manufacturing them because his brother had allowed the patent to lapse.