How to tell if a yam is good or bad How to tell if a yam is bad or not

How to buy and store yams:

The yam in the vegetable market is mainly a long-pillar species, which is produced in Henan, Shaanxi, Shandong, Hebei and other places. No matter what breed you buy. The epidermis of the tuber is the focus of selection.

The epidermis is smooth and there are no abnormal spots, so you can buy with confidence. Many people didn't find out that the yam was fake when they bought it, and only found out when they cooked it that it turned out to be cassava. How to distinguish a real yam from a fake?

1. Look at the "heart line". There is no heart line in the middle of the yam slices, whereas there is a heart line in the middle of the tapioca chips, and although the heart line is small, it can be seen if you look closely. 2. Look at the edges.

The skin of the yam is very thin and is peeled clean before slicing. After being sliced into dry slices, if there is a thick skin left on the side, it must be a false yam. 3. Distinguish between true and false by hand touch.

Dried yam slices contain a lot of starch, and when you touch it with your hands, it feels more delicate, and there will be more starch sticking to your hands. 4. Distinguish after cooking. Yams are generally easy to boil, whereas cassava is difficult to cook.

The boiled yam has a rotten, powdery texture, while cassava has a harder texture. 5. Preservation of fresh yams: fresh yams are easy to oxidize with oxygen in the air, and contact with iron or metal to form browning, so it is best to cut the yam with a bamboo knife or plastic blade, first draw a line on the skin, and then peel it into sections by hand.

The yam should be soaked in salt water immediately after slicing to prevent oxidation and blackening. 6. Storage conditions of bulk iron stick yam: it can be stored for a long time under dry and ventilated conditions, remember not to let it germinate, the sprouted yam will produce trace amounts of toxins, do not eat.

1. Look at the "heart line": there is no heart line in the middle of the yam slices, while there is a heart line in the middle of the cassava chips. Some cassava chips are thinly shaved, and after drying, the heart thread tends to fall out, but if the heart thread falls off, it will leave a small hole.

If there is a small trouser wheel hole in the middle, it must be tapioca chips.

2. Look at the edges: The skin of the yam is very thin, and it will be sliced clean before being sliced. Whereas, tapioca skin is much thicker than yam skin.

Some cassava the size of a thumb are too small to peel and difficult to peel, and counterfeiters often don't bother to peel them, so after they are cut into dry slices, thick skins remain on the edges. Whoever has thick skin will be a false yam.

3. Distinguish the true from the fake by hand touch: The dried yam slices contain a lot of starch, and when you touch it by hand, it feels more delicate, and there will be more starch sticking to your hands. Although cassava also contains a lot of starch, it has more crude fiber than yams, and it feels coarser to the touch than yams, and there is less starch left on the hands.

4. Identification method after cooking: yam is generally easy to boil, while cassava is difficult to cook. The boiled yam has a rotten, powdery texture, while cassava has a harder texture.