Explanation: The main reason is that the soil has been cultivated for many seasons, becoming loose and rich in humus, creating a favorable environment for worms to grow. In addition, the use of fertilizers, especially chicken manure, has made the soil hot, forcing worms to crawl to the surface at night and early morning to avoid the heat. In addition, changes in weather and low humidity during the day are also factors that make worms seek to rise to the surface. Experts also confirm that this phenomenon is normal and does not harm agricultural production.