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Snowflakes are beautiful crystals that cling together in clumps as they fall, forming snow flakes. The size of a single snowflake is usually between millimeters. Snowflakes are light, weighing only grams individually.
No matter how light and small the snowflakes are, how wonderful they are, its crystals are regular hexagonal shapes, so the ancients had the saying that "there are more than five flowers of plants and trees, and six snowflakes are produced". How beautiful and light the snowflakes are! I'm getting more and more fond of snowflakes, and it would be a pleasure to see the land covered with snow and the trees covered in silver again.
"Ruixue Zhaofeng Year" is a widely spread agricultural proverb in China. In the north, a thick, loose layer of snow covers wheat like a quilt to keep the wheat warm. The nitrogen in the snow is easily absorbed and utilized by crops.
The low temperature of snow water can freeze the pests that overwinter on the surface, and it also brings benefits to agricultural production. Therefore, there is another agricultural proverb: "In winter, the wheat covers the three-layer quilt, and the next year sleeps with steamed buns." ”
Snow has a wide range of effects, but snow has great benefits for humans. First of all, it is conducive to the growth and development of crops. Because snow conducts heat very poorly, the soil surface is covered with a snow cover, which can reduce the transfer of soil heat and block the invasion of cold air on the snow surface, so the crops protected by snow can safely overwinter.
Snow also stores water for crops. In addition, snow enhances soil fertility. It has been determined that every 1 liter of snow water contains about grams of nitrogen.
When snow water penetrates the soil, nitrogen fertilizer is applied once. Feeding livestock and poultry with snow water and irrigating crops can yield significant benefits.
Snow is both good and bad, and in the middle of spring in March and April, there is a sudden cold wave that causes heavy snowfall. It will cause freezing cold. Therefore, the agricultural proverb says: "Wax snow is a treasure, and spring snow is not good." ”
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Purify the air and maintain the temperature.
Landscaping is a game for people.
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Snow does bring some benefits, and here are some possible examples:
1.Winter snowfall can provide moisture to plants. Snow itself contains a certain amount of moisture, and being on snow-covered ground prevents water from evaporating.
2.Snow improves soil quality. When the snow melts, it penetrates into the early touch soil, providing water and nutrients to the soil. At the same time, the snow wheel will also bring some microorganisms and beneficial chemicals that contribute to the health of the soil.
3.The snow is beautiful. When it snows, the snowflakes flutter and the ground is covered in silver, which can easily bring people a romantic, quiet and peaceful feeling. Many people love the snow in winter, and they will go out for a walk and take pictures on snowy days.
4.Snow can bring some winter sports and recreational activities, such as skiing, snowmobiling, snowball fights, building snowmen, etc.
5.Snow also protects some animals and plants. During the winter months, some animals and plants need to survive in cold environments. Snow can provide a protective layer that helps them survive the winter.
Of course, snow can also bring some adverse effects, such as inconvenient transportation, cold weather, etc. But overall, there are some benefits to snow.
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1. Snow helps to keep the soil warm, and has an anti-freezing and warming effect on overwintering crops. The snow that falls to the ground is loose and porous, and it can contain 40 50 percent air. Because air does not transfer heat easily; And because of the cold weather in winter, the snow is often not easy to melt; In this way, the earth is like a large, soft quilt.
This "quilt" prevents the heat in the soil from escaping outwards and prevents the invasion of cold air from the outside.
Second, snow cover is conducive to increasing soil moisture. After the cold, the weather warms up, the snow slowly melts, and the melted snow water loses less, and most of it seeps into the soil, just like an irrigation, which is very good for alleviating the spring drought and doing a good job of spring plowing and sowing.
3. Snow contains a lot of nitride, which can improve soil fertility. Snow adsorbs a large amount of free gas in the air and produces nitrides through chemical reactions. It has been observed that if 1 litre of rain can contain milligrams of nitride, then 1 litre of snow can contain milligrams of nitride.
During snowmelting, these nitrides are carried to the soil by the snowmelt water and become the best fertilizer.
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Function. on crops.
Snow is good for the growth and development of crops. Snow is a substance with a good thermal insulation effect, which can protect plants from frostbite in the cold winter, and the melting of snow water in the spring of the next year can provide a good water supply for vegetation.
It is no coincidence that the power of nature is not a coincidence, because the heat conduction of snow is very poor, and the soil surface is covered with a layer of snow cover, which can reduce the transfer of soil heat and block the invasion of cold air on the snow surface, so that the crops protected by snow can survive the winter safely.
Snow also stores water for crops. In addition, snow enhances soil fertility. It has been determined that every 1 liter of snow water contains about grams of nitrogen. When snow water penetrates the soil, nitrogen fertilizer is applied once. Feeding livestock and poultry with snow water and irrigating crops can yield significant benefits.
At the same time, the abundance of snow water in winter can not only alleviate the drought of the year, but also provide favorable conditions for the timely sowing of spring sowing crops in the coming year and the full seedling strength.
Human health. Frequent bathing with snow water can not only enhance the resistance of the body and reduce diseases, but also promote blood circulation and enhance physical fitness. If you drink clean snow water for a long time, you can live longer.
This is one of the "secrets" of longevity in the deep mountains and old forests.
Snow also has other medical effects, it can remove fire, brighten the eyes, lower blood lipids, and so on.
Thermal insulation. The snow, like a wonderful carpet, spreads over the earth so that the temperature of the ground does not drop too low due to the bitter cold of winter. The thermal insulation effect of snow cover is inseparable from its own characteristics.
as a water resource.
When the city is threatened by snowfall, the "urban secondary disaster" events related to snowfall are gradually revealed, and the losses caused by snowfall are becoming more and more prominent, seriously affecting the normal operation of urban economic life.
In addition, the development of urbanization has also caused water shortages in many cities, especially in China, where the precipitation in winter is low, and the problem of urban water shortage is more prominent. Urban snowfall plays an extremely important role in alleviating and supplementing urban winter water shortages, improving and protecting the ecological environment.
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As long as the temperature is below zero and there is enough moisture to condense into ice, it will snow when the sun comes out.