The State Forestry Fund shall consist of those special revenues as specified in § 19-6-301(6) and (18) excluding twenty-five percent (25%) of all other severance taxes as set out in § 19-6-301(18), fifty percent (50%) of § 19-6-301(26), and such general revenues as may be provided by law, there to be used for the maintenance, operation, and improvement required by the Arkansas Forestry Commission in carrying out the functions, powers, and duties as set out in § 15-31-101 et seq., or other duties imposed by law upon the commission.