I am looking for some innovative ideas for my PhD dissertation.

My field: Irrigation Engineering

I am interested to do research in Subsurface Drip Irrigation (SDI) as there haven't been many papers in SDI in the aspect of USA.. I would be very grateful if the reader could mention some unexplored areas in SDI (I have some ideas in mind, but, may be not strong enough to be a PhD paper in my university).

Thank you in advance.

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