? implement of agricultural seed planting?

摘要

agricultural seed planting implement (20) which has a frame (22) movable in an upward and downward direction relative to the ground upon which the frame (22) moves. a frame-mounted seed trench opening assembly includes side-by-side disks (32) having a forming point (100) positioned therebetween. a wearable plastic insert (116) is slidably but not rotatably retained at the forming point (100) to abut the discs (32) as they are bent. the discs (32) are removable to allow simple replacement of the wearable insert (116).