Seeding system comprising a seeding drum, and assembly for such a seeding system

Abstract

Seeding system (100; 200), comprising: a hopper (110; 210), for holding a plurality of seeds (30); a seeding drum (120; 220) comprising rows of through—openings and arranged for picking up seeds from the hopper during rotation ofthe seeding drum relative to the hopper, such that the seeds are held on an outer surface of the drum by a vacuum force exerted on the seeds through the through—openings; a detector for detecting, for a row of through—openings that is arranged in a seed detection area (d4), a number of said through—openings which hold at least one seed; and a row discard mechanism (160; 260) adapted for, upon receipt of a row discard signal, discarding all seeds held on a row of through—openings at a discard area (d6) by providing a positive air pressure at said row of through—openings from an interior side of the drum, and otherwise for holding the seeds at said row by means of vacuum suction, wherein the discard area (d6) is arranged, along the direction of rotation, between the seed pickup area (al) and a seed depositing area (d8) where the seeds held on the drum may be deposited at locations that are substantially predetermined relative to the hopper; a controller (170; 270), adapted for transmitting the row discard signal to the row discard mechanism (160; 260) depending on the number detected by the detector for said row of through—openings when the row was at the seed detecting area (d4).