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If the concentration of salt in the soil...

If the concentration of salt in the soil is too high and the plants may wilt even if the field is thoroughly irrigated. Explain.

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High concentrations of salt in the soil leads to the wilting of plants due to the phenomenon of plasmolysis taking place in the root cells.
Plasmolysis is a process in which when a plant cell is kept in a hypertonic solution, ( here soil) water leaves the cell due to exosmosis. Due to this water loss, protoplasm shrinks and the cell membrane is pulled away from cell wall and finally becomes flaccid.
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