The main reason of soybean flower and pod dropping

1. The application of nitrogen fertilizer is unreasonable. The suitable amount of nitrogen fertilizer can promote the development of soybean rhizobium and increase the amount of nitrogen fixation per plant, which is beneficial to increase the yield of soybean. If excessive nitrogen fertilizer is applied blindly, it will not only inhibit nitrogen fixation, but also cause excessive nutrition, overgrowth of plants, closure and lodging of plants, and shedding of flowers and pods. 2. The density is too high. The density is too high, the plants are crowded, the ontogeny is blocked, and the growth is weak, so the flowers and pods fall off seriously. 3. Improper soil moisture. High soil moisture and poor air permeability cause curling and yellowing of bean leaves, mildew and rot of bean roots, causing a large number of flowers and pods to fall off; if there is not enough water, it will hinder the absorption of carbon dioxide, affect the normal progress of photosynthesis, and make the plant wilt and stop growing. flowers and pods also fall off. 4. Diseases and insect pests. The flower and pod stage is damaged by purple spot disease and bean pod borer, which will also cause flowers and pods to fall.