Abstract: A distributor head of a distribution agricultural device comprises an outer hoop provided with at least four outlets of the same size, arranged evenly along the circumference of the outer hoop, a movably positioned ring, a main inlet, and a driving mechanism connected with the ring through a ring attachment, wherein the ring is provided with a number of evenly arranged openings of the same size, number of which corresponds to half of the number of outlets. The ring can be in three operating positions, wherein in the first position, the ring is located in the same plane as the outer hoop and therefore covers every other outlet, in the second position it is not located in the same plane as the outer hoop and thus does not cover any outlet, and in the third position it is located in the same plane as the outer hoop and thus covers every other outlet, wherein the outlets covered in the third position are different from the outlets covered in the first position of the ring.

Abstract: A distributor head of a distribution agricultural device comprises an outer hoop provided with at least four outlets of the same size, arranged evenly along the circumference of the outer hoop, a movably positioned ring, a main inlet, and a driving mechanism connected with the ring through a ring attachment, wherein the ring is provided with a number of evenly arranged openings of the same size, number of which corresponds to half of the number of outlets. The ring can be in three operating positions, wherein in the first position, the ring is located in the same plane as the outer hoop and therefore covers every other outlet, in the second position it is not located in the same plane as the outer hoop and thus does not cover any outlet, and in the third position it is located in the same plane as the outer hoop and thus covers every other outlet, wherein the outlets covered in the third position are different from the outlets covered in the first position of the ring.

Abstract: A device for metering of seed grain, in particular a device (19) for metering of seed grain (2) arranged on a sowing machine, comprising a carrying means (4) and a tube (3) for the outlet of seed grain (2) towards the sowing area, where the carrying means (4) is specifically made to be with negative air-pressure or positive air pressure, which comprises at least one tube (1) with pressurised air for directing seed grain (2) from the carrying means (4) into the tube (3) for the outlet of seed grain (2), and a tube (1) with pressurised air is adjacent to the carrying means (4) and its axis (5) forms a tangent (13) to the carrying means (4) an angle of ?=±30°, and the tube (3) for the outlet of seed grain (2) is adjacent to the carrying means (4), wherein its axis (6) forms a tangent (13) to the carrying means (4) an angle of Y=±30°.