Iron stick yam skin is rough and unique. In addition to dense bristles, there are common red rust spots. The skin is very thin, uneven thickness and ugly.

Yam, with smooth skin, no "rust spots", a small amount of papules and scattered whiskers, has a uniform and regular shape and a thickness of up to 4 cm.

2, the section color is different

Cut the yam and let it stand for 10 minute, and then judge it according to the color of the slice. The real iron stick yam is not easy to oxidize and turn yellow no matter how long it is kept, but it is very easy to oxidize and turn yellow if it is not soaked in water after cutting.

3. Different textures

The meat of iron stick yam is hard, not easy to break, delicate in texture and less sticky. Moreover, potato is fragile and easy to break. At the same time, the water and mucus of hemp potato are more than that of iron potato.

4. Different tastes

Iron stick yam is easy to cook, but it is also easy to cook, and it tastes slightly numb in glutinous rice flour. Sesame yam tastes crisp and refreshing, and it is not easy to rot after long cooking, so it is suitable for cooking.