Insects used to hide in the soil in winter without drinking or eating, which was called "sting"; On the day of "Sting Festival", the spring thunder in the sky awakens the secluded animals, which is called "shock".
Therefore, insects wake up when they are startled, the weather gets warmer, and there are spring thunder gradually, so most areas of China enter the spring ploughing season. In ancient times, it was divided into three stages: "when the peach is waiting, it will begin to bloom;" Second, wait for the sound of Cang Geng (Huang Li); Three waiting eagles turned into pigeons. "The flower letters represented by the three stages of fright are:" Peach blossom, apricot blossom and rose. " .
Wheat in the south of the Yangtze River has been jointing and rape has begun to blossom. There is a high demand for water and fertilizer, so topdressing should be done in time, and proper irrigation should be done in dry and rainy places.
Rain in the south can generally meet the needs of vegetables, wheat and green manure crops in spring, and it is most important to prevent wet damage. As the saying goes, "wheat should be ploughed in three parts, and matches are like throwing dung", and "if you want to harvest rapeseed, you must be diligent in ploughing". We should continue to do a good job in ditch cleaning and drainage.
We should pay close attention to sowing early rice in South China, and at the same time do a good job in cold prevention in rice fields. As the temperature rises, tea trees gradually germinate, so it is necessary to prune and apply "germination accelerating fertilizer" in time to promote more branches and leaves and increase tea yield. Fruit trees such as peaches, pears and apples should be fertilized before flowering.