Abstract: Sowing element for precision agricultural seeders comprising a device for selecting the seed, of the type which is formed of a perforated disc having opposing faces that are subject to a pressure differential and a pressurisation device associated with the disc for applying the pressure differential to the faces of the disc, the pressurisation device including a pressurisation bell combined with the disc so as to pneumatically couple thereto in order to guarantee said pressure differential, wherein the bell is rotatably idle with respect to the disc.

Abstract: A sowing element for precision pneumatic seed drills. The sowing element includes a conduit for transporting the seed with an initial portion which is proximal to a device for isolating the seed, an intermediate portion which extends in continuation of the initial portion, and a terminal portion for dispensing the seed; and a pneumatic accelerator which is arranged along the conduit for transporting the seed. The pneumatic accelerator is positioned between the intermediate portion and the terminal portion of the conduit for transporting the seed.

Abstract: A sowing element for precision pneumatic seed drills. The sowing element includes a selector disc for isolating the seed, the selector disc being rotatable about an axis (X), and a conduit for transporting the seed with an initial portion which is proximal to a position for removing the seed from the selector disc and an intermediate portion which extends in continuation of the initial portion. The conduit, at least in the initial portion and in the intermediate portion, is substantially rectilinear and substantially coaxial and has an axis (Y) which is located inside a plane which is substantially perpendicular to the sowing ground and parallel with the sowing advance direction.