Five grains include rice, wheat, soybeans, corn, and potatoes.

1. Rice

Botanically, rice belongs to the common rice subspecies in the common cultivated rice subgenus of the family Poaceae. Humankind has identified 22 types of rice, but the only one used for bulk trade is the common type.

2. Wheat

Wheat is an annual or biennial herbaceous plant. The stems are hollow and have joints. The leaves are long lanceolate. The spikes are called "wheat ears", and the spikelets are flat on both sides, with or without awns. Caryopses are wheat grains. According to the sowing period, wheat is divided into winter wheat and spring wheat.

3. Soybeans

Soybeans are native to China and are cultivated throughout China and are also widely cultivated around the world. Soybean is one of the important food crops in China. It has a cultivation history of 5,000 years. It was called Shu in ancient times and is mainly produced in Northeast China. It is a crop whose seeds are rich in plant protein.

4. Corn

Corn is also known as corn, corn cob, corn, pearl rice, etc. Native to Central and South America, it is an important food crop in the world and is widely distributed in the United States, China, Brazil and other countries.

5. Yam crops

Yum crops mainly include sweet potatoes, potatoes, yams, taro, etc. The product organs of this type of crops are roots and tubers, which grow in the soil and have two physiological stages: the early growth stage and the root (stem) expansion stage.

Baidu Encyclopedia - Potato Crops

Baidu Encyclopedia - Corn

Baidu Encyclopedia - Soybeans

Baidu Encyclopedia - Wheat

Baidu Encyclopedia - Rice

Baidu Encyclopedia - Whole grains