Why are some yams crisp and some waxy? Any explanation? Is the price the same? Is the nutrition the same?

Nutrition is almost the same, you can choose to buy according to your favorite taste. There will be differences in prices. Iron stick yam is generally popular and the most glutinous, and its price is slightly higher than others. Crispy yam is called vegetable yam, and flour is called iron yam. They contain different nutrients and nutrient content, and iron stick yam with flour has higher nutritional value and good nourishing effect. There is pure iron bar yam nectar on the market here, which is easier to eat, digest and absorb, and tastes good.

Extended data:

Yam, formerly known as Huai Yam, was named Li Yu in Tang Daizong, but it was changed to potato medicine because of taboo; In the Northern Song Dynasty, it was renamed Yam to avoid Song Yingzong Zhao Shu. Huaiqing Prefecture (present-day, Wuzhi and wen county) produces the best, which is called "Huai Yam". "Dioscorea opposita" was exhibited in Panama World Expo in 19 14, and it was well-known at home and abroad. Over the years, it has been exported to more than ten countries and regions such as Britain and the United States. Compendium of Materia Medica says that it has nourishing effects such as tonifying middle energizer, strengthening tendons and strengthening spleen.

As a Chinese herbal medicine with the same origin of medicine and food, Dioscorea opposita has different origin characteristics due to the influence of regional climate characteristics, geological characteristics, growth habits and other factors. Yam is mainly produced in Aibo, Wuzhi, wen county and other places in Henan, and also cultivated in Shaanxi, Shandong, Hebei, Zhejiang, Hunan, Sichuan, Yunnan, Guizhou and Guangxi. Guangxi, Hebei, Henan and other major producing areas constitute the main planting areas of yam.

References:

Yam _ Baidu Encyclopedia