Hard Wheat whose horny part accounts for more than half of the cross section of the grain is called horny grains, and wheat whose horny grain content exceeds 70% is called hard wheat.

According to Chinese standards, soft wheat refers to wheat with a flour content of not less than 70%. Soft wheat endosperm structure is loose and gypsum-like, also known as silty; As far as wheat grain is concerned, when its horniness is less than 1/2, it is called silty soft wheat. Flour ground from soft plasmid wheat is only suitable for making biscuits, cakes and other foods.