Answer: Vegetative propagation
Step-by-step explanation:
Vegetative propagation is an asexual mode of reproduction. In this the new plant grows from the leaves, shoot and roots of the parent plants.
The potato pieces will act as seed tubers, if these contain eye shaped depression on the potato tuber. These consist of the dormant buds which can give birth to new shoots under suitable environmental conditions. This is one of the example of vegetative propagation.
Thus new potato crops can be grown by the farmers through vegetative propagation.