Abstract: An automatic volume controlled sequential irrigation system and automatic volume controlled irrigation valve therefor includes an inlet port connectable to a source of pressurized water, a discharge port, a bypass port, a valve in the discharge port movable between an open position and a closed position and a valve in the bypass port movable between a closed position and an opened position. The irrigation valve also includes a mechanism for selecting a predetermined volume of water to be discharged from the discharge port which measures the volume of water discharged from the discharge. When a predetermined volume of water has passed through the discharge port, the discharge valve moves from the open position to the closed position and the bypass valve moves from the closed position to the open position.