It only takes one minute to top fertilize one mu of land. Intelligent drones “add wings”

The period from regreening stage to heading stage is the period of the fastest growth rate and maximum growth amount of wheat, which is very important for the high yield of wheat. In the past, wheat topdressing using wheel type fertilizer spreader or artificial back pot spraying, easy to cause uneven sowing, seedling rolling, rain can not work and other problems, and a skilled farmer can only fertilize 15-20 acres a day, far behind the needs of large-scale agricultural production