The staple crop is rice.

主要农作物为水稻。

Tea is the staple crop here.

本地产品以茶叶为大宗。

Wheat was a staple crop in China.

小麦是中国重要的粮食作物。

That used to be the staple crop of the islanders.

那以前是岛民的主要作物。

Wheat is a staple crop for millions of people around the globe.

小麦是全世界上千万的人口的主要粮食。