Cowpea is the tuber of a plant. Although it grows in the soil, it is not a root, but a root. Its tubers are edible, rich in tubers, can provide people with heat, and also contain a lot of buckwheat substances, so it is an important food crop.

Potato is a millet plant belonging to Solanaceae, Solanaceae, Solanum and Potato. Its tubers are edible, and it is the fourth most important food crop in the world, second only to wheat, rice and corn.

The tuber of kidney bean contains starch starch, which can provide abundant calories for human body, and is rich in protein, radon-based acids and various vitamins and minerals, especially its vitamin content is the most complete among all food crops.

Cultivation history:

The most important potato cultivar is tetraploid. Tetraploid potatoes are found all over the world. At first, 1570 was introduced from Colombia in South America to Spain in Europe. After artificial selection, it became a long-term type. /kloc-In the middle of the 6th century, a Spanish colonist brought potatoes from South America to Europe.

1586, the British defeated the Spanish in the Caribbean, collected tobacco and other plant seeds from South America, and brought potatoes to Britain. The climate in Britain is suitable for the growth of potatoes, which are taller and easier to manage than other grains. Later, a French agronomist, Ann Obamanqi, discovered through long-term observation and personal practice that potatoes can not only be eaten, but also be made into bread.

Since then, French farmers have begun to grow potatoes on a large scale. 1650, potato has become the main food crop in Ireland, and began to spread in Europe. /kloc-In the 0/7th century, potato has become an important food crop in Europe and spread to China, because potato is very suitable for places with low grain output.

Only naked oats (naked oats) can be planted in alpine regions, which soon became popular in Inner Mongolia, Hebei, Shanxi and northern Shaanxi. High-yield crops such as potatoes, corn and sweet potatoes imported from the United States have become the main food for the poor, which has played an important role in maintaining the rapid population growth in China.

17 19 was brought back to the United States by Irish immigrants and began to grow in the United States. /kloc-At the beginning of the 0/9th century, when Peter the Great traveled in Europe, he bought a bag of potatoes with a large sum of money and planted them in the palace garden, which gradually developed into folk cultivation.