Molybdenum is a trace element. Although the demand for soybeans is not large, if it is lacking, it will also seriously affect the yield. According to the relevant tests, the appropriate application of molybdenum fertilizer can increase soybean production by more than 10%. The currently used molybdenum fertilizer is mainly ammonium molybdate, which can be used as base fertilizer, seed fertilizer or top-dressing fertilizer. 1. Base fertilizer: Generally, 2-4 kg of ammonium molybdate is used. If it is mixed with organic fertilizer, it is more conducive to improving efficacy. 2. Seed Fertilizer: Use 4-8 grams of ammonium molybdate per kilogram of bean seed, dissolve the ammonium molybdate with a small amount of water before the seed dressing, and spray evenly on the bean seed. Mix and dry after sowing. 3ã€Extra-root spraying: spray the concentration of 0.05% -0.1% ammonium molybdate solution, respectively, in the soybean branch, flowering, drum grain period, mu spray solution 30-40 kg, spray time best choice in the afternoon, so as not to Excessive evaporation.