Iron stick yam skin is rough and unique. In addition to the thick whiskers, 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.
Second, the cross-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.
Third, the texture is different.
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.
Fourth, 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.
Extended data
Iron stick yam is one of many varieties of yam, and it is a fine product in Huai yam. Iron stick yam has traces similar to rust, so it is named iron stick yam. Iron stick yam has good nutrition and high medicinal value, and has been used as medicine in ancient books. Wen county, Jiaozuo, Henan Province is the geographical indication producing area of iron stick yam. According to the different cultivated soils, iron stick yam can be divided into sandy soil and loessial soil.