Abstract: A mobile field robot having a normal axis and configured to drive on the ground includes a frame, a first driving wheel that is driven by a first electrical motor and which is rotatably mounted to the frame or to a structure connected to the frame, a second driving wheel that is driven by a second electrical motor and which is rotatably mounted to the frame or to a structure connected to the frame, and a steerable wheel rotatably mounted to a wheel mount. The steerable wheel has a steerable wheel shaft axis, and is arranged and configured to be rotated in such a manner that the steerable wheel shaft axis is rotated about the normal axis. Further, a joint assembly is arranged and configured to rotate the steerable wheel in such a manner that the angle between the ground and the steerable wheel shaft axis is changed.

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.