What does it mean to rain in long summer?

Long summer and rainy days mean that when the rainy season begins, the rainfall and rainy days will increase obviously. After the long summer, Jiangnan officially entered the rainy season, and the continuous rain not only caused wet damage to crops. It will also cause the prevalence of many diseases. In particular, some wheat and rice crops are prone to pests and diseases, and people who are also engaged in agricultural work can pay attention to the prevention and control of pests and diseases. Before and after the long summer, the temperature in North China and Northwest China rose rapidly, but the precipitation was still not much. In addition, the wind is strong and evaporation is strong in spring. Atmospheric dryness and soil drought often seriously affect the normal growth of crops. Especially, the dry hot wind before and after wheat filling and milk ripening is an important disastrous weather that leads to yield reduction, and timely irrigation is the key measure for drought resistance and disaster prevention. "hoes are everywhere for three days in the long summer", when weeds grow rapidly. "Don't mow the grass for one day, and don't mow it for three days." Intertillage weeding can not only weed, resist drought and prevent waterlogging, but also increase the ground temperature and accelerate the decomposition of soil nutrients, which is of great significance to promote the robust growth of crops such as cotton, corn, sorghum and peanuts at seedling stage. After the long summer, it is a critical period for early rice planting, and rain will come sooner or later. The rainfall during this period is closely related to the future harvest.