Abstract: A pneumatic conveying device for conveying granular material, in particular seeds and/or fertilizer, includes at least one blower with at least one outlet, to which the at least one main air supply line is connected, into which flows an air flow generated by the blower. The at least one main air supply line leads into an air inlet of an air distribution device for controlling the volumetric air flow. The air distribution device has an even number of air outlets, to which the respective one connecting line is connected, to which a metering device for supplying the granular material is connected. The air distribution device is embodied as a cylindrical housing with a rotary slide valve arranged therein, which is equipped for changing an outlet cross-section of the air outlets in order to manipulate the supplied volumetric air flow for transporting the granular material coming from the respective metering device.

Abstract: Sowing heart for an individual grain sowing machine including a seed disk which can rotate in one direction of rotation R, wherein the seed disk has sowing holes in a defined arrangement; a receiving region for receiving the seed in the sowing holes and a delivery region for delivery of the seed; and a cleaning element for cleaning of the sowing holes during operation of the sowing heart between the delivery region and the receiving region. For improved cleaning action of the cleaning element for cleaning each hole, per revolution of the seed disk there being at least two separate cleaning phases which can be easily replaced at the same time. Furthermore, the invention relates to an individual grain sowing machine with a plurality of sowing assemblies with one aforementioned sowing heart at a time and a corresponding cleaning element.

Abstract: Sowing heart for an individual grain sowing machine including a seed disk which can rotate in one direction of rotation R, wherein the seed disk has sowing holes in a defined arrangement; a receiving region for receiving the seed in the sowing holes and a delivery region for delivery of the seed; and cleaning means for cleaning of the sowing holes during operation of the sowing heart between the delivery region and the receiving region. For improved cleaning action of the cleaning means for cleaning each hole, per revolution of the seed disk there being at least two separate cleaning phases which can be easily replaced at the same time. Furthermore, the invention relates to an individual grain sowing machine with a plurality of sowing assemblies with one aforementioned sowing heart at a time and a corresponding cleaning element.