Question on water potential.?

Imagine that you are an agri-science consultant to a large corporate farm that raises 7,000 acres of wheat on desert land adjoining the Mediterranean Sea. Just before the wheat matures, all the wells used for irrigation water run dry. The farm manager wants to irrigate the fields with water drawn from the Mediterranean. From previous tests, you know that the average solute potential of root tissue taken from the wheat fields is - 11.13 bars. You test the seawater and determine its solute potential to be -24.26 bars. What will you advise the farm manager and why?