Ground-engaging farm implement with axle suspension to enhance field surface contact

A ground-engaging farm implement comprising:

• a. a support frame, a front end portion of the support frame being adapted for being coupled to a power unit;
• b. at least one ground-engaging tool mounted to the support frame;
• c. two or more independently moveable assemblies each including:
• (i) a wheel support structure comprising a single pivotable mounting arm having one or two support wheels rotatably mounted thereto on an axis of rotation extending through the mounting arm, the mounting arm being mounted to the support frame by a pivot such that the one or two support wheels are enabled to move a predetermined substantially vertical distance with respect to the support frame while the implement moves across a ground surface in a direction of travel, wherein the pivotable motion of the mounting arm of each of the moveable assemblies is not mechanically interconnected to any other of the mounting arms of the wheel support structure;
• (ii) a suspension element interposed between the support frame and the wheel support structure, the suspension element configured to control the vertical movement behaviour of the related support wheel, wherein the suspension element comprises at least one air bag;
• and
• d. a suspension control system comprising:
• at least one of an air bag pressure sensor and a ride height sensor;
• and
• a control unit;
• wherein the control unit is configured to receive information from at least one of the air bag pressure sensor and the ride height sensor, and is configured to independently adjust the pressure each air bag to achieve at least one of a desired air bag pressure and a desired ride height.