Section 5. Commissioner of agriculture and markets

The  head  of the
  department of agriculture and  markets  shall  be  the  commissioner  of
  agriculture  and markets, who shall be appointed by the governor, by and
  with the advice and consent of the senate, and hold office until the end
  of the term of the governor by whom he  was  appointed,  and  until  his
  successor  is  appointed  and  has  qualified.    He  shall  be a person
  qualified by training and experience  for  the  duties  of  his  office.
  Subject  to removal by the governor, the commissioner of agriculture and
  markets in office at the time this section takes  effect  shall  be  the
  head  of  the  department of agriculture and markets and shall hold such
  office until his successor is appointed and has qualified.  In  addition
  to  the  powers  and duties specifically prescribed by this chapter, the
  commissioner shall have supervision over and direction of  all  officers
  and  employees  and  of  the  affairs  of  the  department.  He shall be
  responsible for the enforcement and carrying into effect  of  the  laws,
  rules  and  orders  pertaining to matters as to which the department has
  functions, powers and duties.