The machine has disc implements with at least one beam supporting them. The vertical discs (9) on each beam being, in groups, arranged parallel to one another and inclined at an angle form the normal to the longitudinal direction of the beam. A share (10) is between consecutive discs (9) on the same beam so that it cultivates and cuts off rootlets present in the soil ridge formed between the grooves of the respective discs. The share is in two parts (14,15), the lower one of which forms a horizontal cutting part projecting away from the adjacent disc (9). A manually adjustable displacement member is included and may be e.g. a rigging screw or a transmission gear, or it may be pneumatically adjustable device operated from the driver's cab.
