在小麦播种时,由于拖拉机重量大,轮胎或履带作用于土壤的压力大,拖拉机走过的土壤都存着被碾压过实问题,致使播种机开沟器入土困难,种子从输种管流出后,非常散乱地裸露在地表面上,保证不了种子播深一致、行距一致,覆盖良好的农艺要求,小 When sowing wheat, due to heavy tractor, tire or track pressure on the soil, the soil traversed by the tractor there are problems of being rolled over, resulting in sowing machine opener difficult to open, the seeds flow out from the feed tube After the very scattered on the bare surface, can not guarantee the same sowing seeds, line spacing, covering a good agronomic requirements, small