Abstract: A cultivator has soil working blade members mounted on a horizontal shaft which is driven to rotate the members forwardly through the soil in the normal direction of travel. A baffle comprised of screen segments are mounted on the cultivator frame to partially surround the blade members. The screen segments are biased about respective pivots and a rod grating is connected to the baffle to extend downardly immediately to the rear of the blade members. The rear screen segment has V-shaped guides to ridge the soil. A hopper communicates with dosing outlets, each outlet being a nozzle device that extends between a pair of guides. Each nozzle device is pivotable to either one of two positions for planting tubers deep or shallow. A pair of rear wheels is connected to the rear of the frame and the wheels are drivenly connected to dosing conveyors leading to the outlets. An adjusting device is associated with each wheel to raise and lower the soil working blade members.