The answer is wheat. When I was young, I was green as a weed, and when I was old, I was covered with gold and jewels. Everyone cherishes these jewels, and no one in the world depends on them, which describes the shape and function of wheat.

Wheat is the general name of Triticum, and its representative species is common wheat or Gramineae, which is a cereal crop widely planted all over the world. Wheat caryopsis is one of the staple foods of human beings. After grinding into flour, it can be made into bread, steamed bread, biscuits, noodles and other foods, and after fermentation, it can be made into beer, alcohol, white wine (such as vodka) or biomass fuel.

Wheat is one of the three major cereals, almost all of which can be eaten, and only about one-sixth of which is used as feed. The two river basins are the earliest areas for growing wheat in the world, and China is one of the earliest countries for growing wheat in the world.

Extended data:

Wheat growing environment

Deep soil layer, good structure and deep tillage layer are beneficial to water storage and fertilizer conservation and promote root system development. Soil structure refers to the proportion of solid (organic and inorganic), liquid and gas, which is closely related to soil moisture, air, temperature and nutrients. For example, sandy soil and heavy clay have poor structure and are difficult to form high yield.

The average daily temperature of winter varieties is 16 ~ 18℃, semi-winter varieties are 14 ~ 16℃, and the elasticity is 12 ~ 14℃. Temperature and air are affected by geographical latitude and altitude, that is, the higher latitude and altitude, the lower temperature and the earlier sowing date. ?

Wheat crops with long sunshine time (8 to 12 hours per day), if the sunshine conditions are insufficient. Can't pass the light stage, can't knot, can't bear fruit. The photoperiod of wheat is after vernalization.