A selection of radial and spiral slotted discs is available for different crop types. Specially designed for maximum planting speeds, the radial slotted disc has a central vacuum system that draws in the grain by suction force and holds it in place. As the disc turns, the grains are transported along the slots to the outside, where the vacuum continues to hold the seeds and allows them to fall through the opener into the ground at the ideal position. At the end of the plot, the remaining seeds are evacuated into the residual grain container. A sluice separates seed from two successive plots, thus preventing the seeds from mixing even at very high planting speeds.