| 摘要 |
A circular, concavo-convex plate having a sharp, outer edge is attached to a seeder, planter, drill or other seeding implement and rotates in a plane oblique to the course of travel of the implement when the plate engages extraneous surface trash material on the field, whereby the material is shaved and scraped from the topsoil and ejected to one side of the planting row as the implement is advanced, exposing a smooth, clear strip of topsoil into which a groove may be readily formed by the implement in preparation for the receipt of seeds. Alternate forms of structure are provided for attaching the plate in a manner to permit varying the attitude of the plate with respect to the topsoil. |
