A set comprising an implement support apparatus and first and second implements (21A, 21B), the implement support apparatus comprising a U-shaped support frame comprising a base beam and right and left substantially parallel side beams (7R, 7L) extending rearward from corresponding right and left portions of the base beam and defining an open implement area between the right and left side beams; the implement support apparatus further comprising: a hitch assembly attached at a rear end thereof to a front end of the support frame and adapted at a front end thereof for connection to a towing vehicle; right and left frame wheels (11R, 11L) mounted to the corresponding right and left side beams and supporting the right and left side beams, each frame wheel rotatable about a frame wheel axis that is fixed in a substantially horizontal orientation perpendicular to an operating travel direction that is substantially aligned with the right and left side beams; each one of said first and second implements (21A, 21B) configured to perform an implement operation and to rest on the ground surface when in an idle position; wherein said first and second implements and the support frame are configured such that when each implement is in the idle position, the support frame is movable, when connected to and propelled by the towing vehicle, rearward with respect to each implement to an implement loading position where each implement is connectable to the support frame and is movable to an operating position where each implement is supported by the support frame and is connectable to an implement control system operative to control implement functions; wherein each of the first and second implements provides a beam lock connection between the right and left side beams; wherein when each of the first and second implements is in the operating position, the beam lock connection resists twisting movement of the right and left side beams to maintain the right and left frame wheels and the right and left side beams in a substantially fixed relationship with respect to each other. a hitch assembly attached at a rear end thereof to a front end of the support frame and adapted at a front end thereof for connection to a towing vehicle; right and left frame wheels (11R, 11L) mounted to the corresponding right and left side beams and supporting the right and left side beams, each frame wheel rotatable about a frame wheel axis that is fixed in a substantially horizontal orientation perpendicular to an operating travel direction that is substantially aligned with the right and left side beams; each one of said first and second implements (21A, 21B) configured to perform an implement operation and to rest on the ground surface when in an idle position; wherein said first and second implements and the support frame are configured such that when each implement is in the idle position, the support frame is movable, when connected to and propelled by the towing vehicle, rearward with respect to each implement to an implement loading position where each implement is connectable to the support frame and is movable to an operating position where each implement is supported by the support frame and is connectable to an implement control system operative to control implement functions; wherein each of the first and second implements provides a beam lock connection between the right and left side beams; wherein when each of the first and second implements is in the operating position, the beam lock connection resists twisting movement of the right and left side beams to maintain the right and left frame wheels and the right and left side beams in a substantially fixed relationship with respect to each other.