Section 111. The execution of one or more marketing agreements pursuant to section one hundred and four of this chapter shall in no manner affect the issuance, administration or enforcement of any marketing order provided for in said sections one hundred and two through one hundred and fifteen. The commissioner may issue such marketing order without executing a marketing agreement or may execute a marketing agreement without issuing a marketing order covering the same fresh or processed apples. The commissioner, in his discretion, may hold a concurrent hearing upon a proposed marketing agreement and a proposed marketing order after giving due notice and opportunity for hearing.