Signs before snow

Before the heavy snow, the temperature will be relatively low, the water vapor will be large, and the clouds will be thick and low, indicating that the weather is gloomy; If there is cold air going south, there will be windy weather, and convective weather may occur in the case of a fast cold front.

Snow is a natural phenomenon. The water vapor in the air condenses and then falls to the ground again. Water is the foundation of all kinds of life on the earth, and its changes and movements have created our world today.

On the earth, water is constantly circulating. The water in the ocean and on the ground is heated and evaporated into the sky. The water vapor moves to other places with the wind. When they encounter cold air, they form precipitation and return to the earth's surface. There are two kinds of precipitation: one is liquid precipitation, which is rain; The other is solid precipitation, which is snow or hail.

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The benefits of snow on crops

Snow is beneficial to the growth and development of crops. Snow is a kind of material with good heat preservation effect, which can protect plants from frostbite in cold winter. The melting of snow water in the next spring can provide a good water supply for vegetation. The power of nature is definitely not a coincidence. Because of the poor thermal conductivity of snow, covering the soil surface with a layer of snow can reduce the diffusion of soil heat and prevent the cold from invading the snow surface.

Therefore, crops protected by snow can survive the winter safely. Snow can also store water for crops. In addition, snow can enhance soil fertility. According to the determination, every 1 liter of snow water contains about 7.5 grams of nitride. Snow water permeates the soil, which is equivalent to applying nitrogen fertilizer once. Feeding livestock and poultry with snow water and irrigating crops can obtain obvious benefits.

At the same time, sufficient snow and water in winter can not only alleviate the drought in that year, but also provide favorable conditions for timely sowing and full seedling growth of spring-sown crops in the coming year.