Potato is a perennial herb of Solanaceae, also known as potato and sweet potato. Tubers are edible, and together with corn, rice, sorghum and wheat, they have become the five major crops in the world.

2. Chinese yam

Yam is also known as yam, yam and white yam. Its rhizome is rod-shaped, and the longest is about 1 m. There are few branches on the roots, and there are many fibrous roots on the white roots.

3. Sweet potato

Sweet potato is also called sweet potato, sweet potato and sweet potato. Its roots are divided into fibrous roots, tuberous roots and firewood roots. Stems vary in length due to different varieties, and are thin and long varieties.

4. Little carrots

Radish is panicum miliaceum, with fleshy straight roots. The skin is green, white or red, and its shape is spherical, conical or rectangular.