1, the development of seeding joint operation and direct seeding technologyThe combined operation of sowing refers to the completion of tillage, soil preparation, fertilization and pesticide spraying while sowing. Its advantages are that multiple operations can be completed at one time, and the operation efficiency is high, ensuring timely sowing and increasing yield; It can make full use of supporting power, save energy and reduce operation cost. It can reduce the number of units entering the ground and protect the soil from over-compaction by machines and tools. At present, the combined operation of film laying and sowing has been developed with good results.