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A water injection spout for digging holes is an agricultural irrigation tool consisting of a hollow cylinder (1) with a tubular segment (4) for fitting a water supply pipe (2), a funnel-shaped segment (5) for increasing the water injection speed, and another tubular segment (7) for drilling a hole in the water-softened earth, such that the loosened earth be entrained by the water and pumped upwards through the gap between the injector and the already dug hole.