| 摘要 |
A precision seeder for depositing single seeds at predetermined spacings in seed beds or unprepared soil, in which a vacuum pick-up (78), connected to the air intake of a tractor towing the seeder, is arranged to receive, from a hopper (122), and retain a single seed (98) in each of a plurality of discrete orifices (94). A vacuum release, cooperable with each orifice (94), sequentially disengages the retained seeds (98), at a predetermined release point by releasing the vacuum of the pick-up, to a seed depositor (134) which transfers the sequentially disengaged seeds (98) to predetermined spacings in a seed bed, regardless of the forward speed of the seeder (10). <IMAGE> |
