Abstract: A folding boom construction comprising a wheeled frame, a boom disposed transversely of the wheeled frame, the boom being adapted to support one or more cultivating tools, the boom being coupled to the wheeled frame to be rotatable about a substantially transverse axis of the wheeled frame, the boom being rotatable about an axis transverse of the boom such that on rotation about the axis transverse to the wheeled frame the cultivating tools can be raised or lowered from the ground and when the tools are in the raised position the transverse axis is substantially upright such that the boom can be swung from the transverse position to a fore-and-aft position.