Which of the following crop pair is NOT part of the American Vegetable Triad?

The crop pair that is not part of the American Vegetable Triad is wheat. The American Vegetable Triad typically consists of three main crops: corn, beans, and squash. This triad refers to the complementary planting of these plants, which are integral to traditional indigenous agricultural practices, particularly among Native American communities.

Corn provides a tall structure for beans to climb, while beans add nitrogen to the soil, benefiting both plants. Squash, with its broad leaves, helps to cover the ground and suppress weeds, while also providing shade. This combination creates a sustainable and synergistic ecosystem where each plant supports the growth of the others.

Wheat, on the other hand, is classified as a cereal grain rather than a vegetable and does not fit into this classic triadic relationship. It played a significant role in agriculture but is not part of the specific group known as the American Vegetable Triad.