Question

what would happen if lot of salt is sprinkled on the soil structure one is seen

Answer 1

The root hair would undergo exosmosis .
It would turn flaccid (plasmolysis).

Hope it helps you.

Answer 2

The primary effect of excess salinity is that it renders less water available to plants although some is still present in the root zone. This is because the osmotic pressure of the soil solution increases as the salt concentration increases.