Abstract: A drop sprinkler assembly for connection to an irrigation conduit of a center pivot irrigation system adjacent a tower support of the system includes a fluid conduit having first and second ends, the first end for fluid communication with an irrigation conduit of a center pivot irrigation system. The assembly also includes a valve having an inlet, two outlets and a switching mechanism for controlling fluid flow through the valve, specifically for allowing fluid flow between the inlet and a selected one of the outlets. The second end of the fluid conduit is in fluid communication with the inlet of the valve. Also included are first and second sprinkler conduits each having an upper and a lower end, the upper end of each sprinkler conduit in fluid communication with one of the outlets of the valve.