When the day set for hearing has arrived, and the hearing is not continued by the court for good reason, as it may be, and when the hearing is had, the monthly county court shall proceed to hear and determine all objections made and filed to the report, and may increase, diminish, annul, or affirm the apportionment and assessments made in the report, or in any parts of the report, as may appear to the court to be just and equitable; but in no case shall it be competent to show that the lands assessed would not be benefited by the improvement. When the hearing has been had, the court shall assess the apportionment fixed by it upon the lands within the road improvement district.