Snow is the scientific basis for the following six points:

One, snow helps to keep the soil warm, the winter crops have anti-freezing warm effect. The new snowfall to the ground is loose and porous, which can contain 40% -50% of the air. Because the air is not easy to heat transfer; and because of the cold winter weather, the snow is often not easy to melt; so, the earth is like covered with a large and soft quilt. This "quilt" can prevent the heat in the soil to the outside, but also to prevent the invasion of cold air.

Two, snow is conducive to increasing soil moisture. After the cold, the weather warmed up, the snow slowly melted, melted snow water loss is small, most of the infiltration of the soil, like an irrigation, to alleviate the spring drought, do a good job of spring planting is very good.

Three, the snow contains a lot of nitrogen compounds can improve soil fertility. Snow can adsorb a large number of free gas in the air, through chemical reactions, generate nitrogen compounds. According to observation, if 1 liter of rain can contain 1.5 milligrams of nitrogen compounds, then 1 liter of snow containing nitrogen compounds can reach 7.5 milligrams. During snowmelt, these nitrides are carried to the soil by the snowmelt water and become the best fertilizer.

Four, snow can eliminate pests and reduce the occurrence of pests. Snow blocks the circulation of air on the surface, which can make part of the overwintering pests in the soil suffocate and die. Snow melt, due to consume a lot of heat, and make the soil temperature suddenly lowered, this time the soil surface and crop stubble in the pests and eggs frozen to death, so that the crop growth of pests greatly reduced.

Fifth, snow can increase production. According to scientific tests show that snow water contains less heavy water, heavy water per kilogram of snow water (tritium) is ordinary water 1/4. heavy water has the effect of inhibiting the growth of crops, so the use of snow water to soak seeds, watering and foliar spraying of a variety of crops and fruits, have the effect of increasing yields.

Sixth, snow can improve the quality. Watering crops with snow can improve the quality of crops. Some people have made a survey, Xinjiang's cantaloupe and grapes (dry) is sweet and flavorful, is a large number of snow watering effect. With snow watering grain and fruit will also significantly improve the quality.

Reference: China Weather Network - The scientific basis of snow: the benefits of snowfall