Abstract: 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.

Abstract: A method for weeding between rows of crops and between individual plants in each row whereby a weeding rod is suspended at a proximal portion thereof and left un-suspended at a distal portion thereof whereby the suspension keeps the distal portion and proximal portion in the same horizontal plane. The method further comprises the step of ensuring that the weeding rod has a rounded cross section in a transverse plane with respect to a length axis thereof between the proximal portion and the distal portion and the further step of advancing the weeding rod below ground level in a direction along a ground plane.