The potato thus became an important staple crop in northern Europe.

Over the centuries cotton became a staple crop in American agriculture.

The surface of the town is even, and farmers produced hay as a staple crop.

A single staple crop getting a disease or pest attack could lead to mass food crisis.

Thus, triticale is becoming established as a significant staple crop.

The principal staple crops of the area are maize and black beans.

The growing region of a traditional staple crop often has a strong cultural cohesiveness.

Cotton has been the staple crop, but it is no longer vital as an export.

It has since spread around the world and become a staple crop in many countries.

Yams are also an important staple crop in the region.