Abstract: A linear move has its opposite end towers alternately made the master or lead tower to cause the move to first swing slightly one way to give corrrective endwise movement in one direction and then swing slightly the other way to give corrective endwise movement in the opposite direction. A control mechanism determines which end tower is the master tower and includes a feeler device positioned within a guide furrow. A main line supplies irrigation water under pressure through an interconnected long elastic hose, rigid U-shaped tow tube, and short hose to the end tower. A cable on a winch drum mounted on the end tower is connected to the tow tube and, when the end tower is not moving, a winch motor drives the drum to pull in the cable, the tow tube and the end portions of the hoses connected to the tow tube so that, as the move moves, it does not pull the heavy long hose but only pulls the lighter short hose.

Abstract: A corner watering circle move in which a line move and sprinklers thereon are stopped when the move comes to a corner portion of a field, an end section of the move then is swung to move a movable coupling member thereon into coupled engagement with a set coupling member, water then is supplied from the line through the coupling members to set sprinklers in the corner portion. After a predetermined sprinkling time, the line is cut off from the coupling sections, the sprinklers on the line are started, the end section is backed away from the set coupling member to a position aligned with the rest of the line and the movable coupling member is offset from the set coupling member, and the line move is moved to the next corner portion. The sprinklers on the line have differential pressure valve actuated by a pilot line on the line to control water supply to these sprinklers.