Reason: Iron bar yam has traces similar to rust, hence its name. Iron stick yam can be divided into two types due to different soil quality: iron stick yam with deep soil layer and iron stick yam with sandy soil.

1, Loutu iron stick yam is hard because of its strong geology, high viscosity and hard soil. Good taste;

2. The sand iron stick yam is planted in the sand, with soft soil, sweet taste, high nutritional value, extremely delicate meat quality, white inside and yellow outside, hard and powdery, less sticky, not rotten after long cooking, slightly sweet fragrance and good taste. Not annoying for a long time. Both medicine and food.

The iron stick yam skin in loam and sand is very thin, especially after cooking. However, it should be noted that a person's daily amount is kept at about 3~4 Liang, and it is easy to get angry if he eats too much.

Due to the low water content of iron stick yam, it is rich in yam polysaccharide, and the juice is thick. After cooking, it tastes dry, greasy and sweet, and it feels "sweet on the face" at the entrance, and it is accompanied by a faint hemp taste when eaten with skin. Iron stick yam is shaped like a tree root, sand-planted yam is long and straight, and iron stick yam is dark in color.

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