A method for placement of seeds one by one onto a growth medium, whereby initially seeds are extracted and singled-out from a disorderly group of seeds is disclosed. The method comprises: placement of the disorderly group of seeds onto a seed wheel which has a wheel plane, wherein the wheel plane is angled with respect to a horizontal plane such that single seeds are allowed to enter openings in the seed wheel which openings are distanced from a rotation axis of the seed wheel, whereby the seed wheel is rotated around the rotation axis which axis is perpendicular to the wheel plane thereby elevating a single seed in each opening out of the group of seeds and allowing singled-out seeds in each opening to leave the opening at a predetermined rotational position of the seed wheel and fall or trickle down a tube or chute onto a growth medium.

The invention relates to an application unit (10) for an agricultural application machine for applying granular material to an agriculturally used area (N), comprising a granular material portioning device (12) into which a granular material flow conveying bulk granular material can be introduced and by means of which portions (P) of granular material can be created from the granular material flow, the application unit (10) being equipped with an air separator (30) that allows air to be separated from the granular material flow.