If the board of supervisors concludes that lands susceptible of the same mode of reclamation are improperly omitted from the proposed district, and the owners thereof have not appeared at the hearing, it shall continue the hearing on the petition, and direct that notice be given to the nonappearing landowners to appear before the board of supervisors, and show cause, why their lands should not be included in the proposed district.

(Added by Stats. 1951, Ch. 336.)