Frost strikes in Zhangjiakou, Hebei, and the temperature approaches 0℃. What protective measures do farmers need to take?

In some areas of southern China, there is still persistent high temperature, but in some areas of northern China, there are frost attacks. After a while, even the temperature slowly approached zero degrees Celsius. So such extreme weather is very dangerous for farmers, because many crops can't stand such rapid and extreme weather changes. So what protective measures should farmers take when the frost strikes in Zhangjiakou, Hebei Province and the temperature approaches zero degrees Celsius?

Then, for these farmers, the most critical point is to determine the temperature required for these crops. Especially for some crops planted outdoors, some protective measures can be built before the arrival of extreme weather to ensure a certain temperature and let the crops grow normally. For nearly mature plants or some seeds, they can be picked in advance, which can avoid certain crop losses and reduce the impact on future crop growth. In addition to the protection of crops, farmers' land also needs a certain degree of protection, because such a serious low temperature will have a serious impact on the land in advance, because it will lead to the freezing of many resources in the land, and it is also likely to lead to land rich in resources, so there will be certain restrictions on the use, so farmers must be prepared in advance and have certain psychological preparations in the process of farming. On the other hand, your preparation is that farmers need to prepare in advance for planting crops in the future. In the face of such bad extreme weather, we should not only make short-term preparations, but also make long-term preparations. It may be necessary to know these situations in advance when planting crops. For a large number of crops, various advanced sprays and chemical components can be used to protect crops and improve their cold and frost resistance. On the other hand, you must try your best to prevent these plants from rotting due to low temperature and rainy weather, and strengthen fertilization.