Iron stick yam from Jiaozuo, Henan Province is more authentic.

Jiaozuo, Henan Province is the authentic origin of the best quality of the iron stick yam. Iron stick yam is a specialty of the Jiaozuo area of Henan Province, grown in Wenxian County and hand-picked for its coarse pores and firm flesh. Authentic Huaiqingfu Iron stick yam has a sweet taste with glutinous surface, with rusty red spots evident, and is very tasty.

According to the Shandong Academy of Agricultural Sciences on the yam's laboratory results, its tubers contain an average of 14.48% crude protein, 3.48% crude fiber, starch 43.7%, sugar 1.14%, potassium 2.62%, phosphorus 0.2%, calcium 0.2%, magnesium 0.14%, ash 5.51%, iron 53.57ppm, zinc 29.22ppm, copper 10.58ppm. Yam contains 16 of the 20 amino acids needed by humans.

How to choose and buy yam:

The yam on the market is divided into two kinds of yam depending on the soil where it is planted, one is kiln-land yam and the other is sand-land yam. The kiln soil is black, hard and coarse, while the sandy soil is yellow and fluffy with more moisture, and is completely different in appearance.

In addition to the different appearance, but also to follow a look, two pinch, three fold, four taste principle. Iron stick yam meat is hard, powdery enough, so it is more sturdy, not easy to break. When broken, the section is delicate, white or slightly tooth yellow, there will be pulling phenomenon, the section can hardly see a little moisture. Ordinary yam section presents bright crystal, water Ying Ying.

The water content in the iron stick yam is less, after cooking, the taste is more dry and sweet, and the mouth feels "noodle and slightly sweet", and accompanied by a slight numbness. After steaming, the outer skin is easy to peel, and the skin is very thin. If you buy a yam after steaming, the outer skin is thick and not easy to separate, it is not authentic iron stick yam.

Reference: Baidu Encyclopedia - Iron stick yam