At its meeting at which the certificate is received from the agricultural commissioner, or at its next meeting, regular or special, thereafter, the board of supervisors shall by order fix a time and place for hearing the petition, which time shall be not less than 20 days nor more than 40 days from the date of the order, and shall give notice of the hearing by publication of the time and place thereof with a general statement of the purpose of the proposed district, together with a description of the boundaries of the proposed district, once a week for two successive weeks immediately prior to the date fixed for the
hearing, in a newspaper of general circulation in the county where the district will be situated.