scarifier

noun

1. One who scarifies.
2. The instrument used for scarifying (as for example during plastering).
3. An implement for working and loosening the soil; often, one with teeth or shanks that does not bring up a fresh surface.

   “Near-synonyms: cultivator, scuffler, grubber, horse hoe (not always precisely differentiated; dialectal usage has varied)”

   “You have your scarifiers to make the ground clean.”