I live in a dry area.

If I dug (or bored) a deep 10 meter hole and planted a small
sapling at the very bottom and then left it alone:

1/ Would its closer proximity to the water table be of
assistance?

2/ Would it grow (albeit etiolated) upwards towards the
light for the whole 10 meters? And then produce foliage as
normal?

3/ Would the beginning of the root system stay at the 10
meter interface, and would the roots grow downwards to the
degree (depth) as though on the normal surface.

4/ Would the nett effect be to have a plant (tree) in a
desert area with deeper roots than those planted at the
surface?

Please help,

P