| 摘要 |
In a preferred embodiment of the invention, a trailer-like multi-sectioned frame is mounted on supporting spaced-apart wheels adjustable intermittently of the height of the frame and having mounted on the various sections of the frame, functional elements including a forward rotatable cutting blade for cutting upper earth soil, a following sub-soil cutting blade aligned to follow in the upper earth cut formed by the forward cutting blade and being formable of a sub-soil groove beneath the slot, a soil-fill-in tine rotatable wheel having laterally curved and directed tine ends extending a breadth wider than the slot such that are trailed along the slot the tine ends cave-in soil to fill the sub-soil groove, a seed-bed-preparing tine wheel mounted to trail in the slot behind the soil-fill-in tine rotatable wheel, and a seed planter of conventional nature mounted to trail the seed-bed-preparing tine wheel to plant within prepared soil along the slot, the tine elements of the seed-bed-preparing tine wheel being curved radially outwardly away from the direction of rotation thereof, and the tines of the soil-fill-in tine rotatable wheel being also curved radially outwardly away from the direction of rotation, there being a trailer hitch element mounted on a forward end retractably, on the forward section of the trailer frame, extended during operation of the machinery when pulled behind a pulling machine.
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