A mobile drip irrigation system includes a plurality of drip tubes anchored at a first end to a water supply conduit. As the mobile irrigation system travels across a surface to be watered a second, free end of each drip tube is pulled along the surface to provide precise and uniform water distribution through the drip tubes. A cable extending across each section of the mobile irrigation system is attached to the plurality of drip tubes within that section, with the cable movable via a winch mechanism to shift the position of the drip tubes within that section to correspondingly shift the drag path of the tubes to a desired location. In exemplary embodiments, a lower manifold distributes water to the drip tubes, and in further embodiments a support restraint provides support to the lower manifold.