tiller

A lever used for steering a boat by turning its rudder.

"He gripped the tiller to steer the dinghy."

To cultivate or break up soil using a mechanical tiller.

"They will tiller the field before planting crops."

A machine with rotating blades for breaking up and cultivating soil.

"She used the garden tiller to prepare the patch."

(Of a plant) to produce new shoots or stems from its base.

"The wheat plant began to tiller vigorously."