There is, in the department, a Fertilizer Inspection Advisory Board consisting of nine persons appointed by the secretary, eight of whom shall be licensed under this chapter and subject to the payment of the inspection fee in accordance with this chapter, and one of whom shall be a public member. The members of the board shall receive no compensation, but are entitled to payment of necessary traveling expenses in accordance with the rules of the Department of Human Resources. These expenses shall be paid out of appropriations made to the department pursuant to this chapter.