| 摘要 |
A subsurface irrigation device of the type comprising a rigid pipe, one end of which is reversibly connected to a pressurized source of irrigation fluid and the other end for insertion into the ground. A substantially blunt tip at the ground penetrating end is provided with orifices capable of releasing, under the control of a valve, a plurality of streams of pressurized fluid at one or more acute angles with respect to the pipe axis, providing improved ground penetration while minimizing root damage.
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