Abstract: A direction of movement sensing apparatus is shiftably supported from the wheel track filling structure of a wheeled support tower for an irrigation pipe and is operative to shift between a first inoperative position assumed thereby when the tower is moving in a forward direction toward a second operative position relative to the wheel track filling structure when the tower is moved rearwardly over the ground. Connecting structure is provided and operatively connected between the direction sensing apparatus, the wheel track filling structure and the tower for raising the wheel track filling structure responsive to movement of the sensing apparatus to the second operative position thereof and thus enabling the tower to move rearwardly without damage to the wheel track filling structure.

Abstract: A plowing implement is disclosed for following and filling wheel tracks created, for example, behind a pair of sprinkler wheel tires, particularly arrangements in which each tire repeatedly traverses the same fixed path. When the track created by the tire is filled with earth by the device of the present invention, plowing or harvesting equipment can cross the path travelled by the wheels without the inconvenience of traversing rough or uneven ruts or tracks which would otherwise be the result.