"Xue Ruizhao's bumper year" lies in the anti-freezing and heat preservation effect of snow layer on overwintering crops. Heavy snow can prevent the heat in the soil from radiating outward and prevent the invasion of cold air from outside.

"Xue Rui indicates a bumper harvest year" lies in the role of snow in increasing soil moisture and fertilizing. When the earth warms up next spring, the snow on the ground will slowly melt. The loss of snowmelt water is less, and most of it seeps into the soil, just like an irrigation, which is of great benefit to alleviating spring drought and sowing well in spring. Melting snow water can bring more nitrogen compounds to the soil. The unique function of Xue Rui is determined by its own nature.

First, the newly fallen snow is loose and porous, which can store a lot of air and has the function of preventing freezing and keeping warm.

Secondly, the content of heavy water in snowmelt water is 25% less than that in ordinary water. Heavy water is a radioactive substance, which has a strong inhibitory effect on the life activities of various organisms. The low content of heavy water in snow is obviously beneficial to promote biological growth and development.

Third, the physical and chemical properties of snow water are different from ordinary water. Due to freezing, the gas in snow water is removed, and the conductivity and density have changed.

Studies show that snow water is very close to the water in biological cells in physiological properties, so it shows strong biological activity. The ability of plants to absorb snow water is two to six times that of tap water. Snow water can stimulate the activity of enzymes and promote metabolism after entering organisms. Fourthly, snow water contains more nitrides, which is five times that of rain water and higher than ordinary water. It can be said that it is a kind of fat water.

Finally, heavy snow can kill most pests, and there will be fewer pests in the coming year.

However, winter snow is harmful to the main crops in southern China. For southern China, the heavy snow in winter is simply a disaster; Wheat and other crops that benefit more from winter snowfall are planted less in the south. Therefore, as an agricultural proverb, Xue Ruizhao's bumper year generally refers to the northern region.