California Code, Penal Code - PEN § 2715

Land belonging to the State of California may, with the approval of the Department of Finance, be transferred to the jurisdiction of the director for the purpose of establishing thereon a prison farm and prisoners in the state prisons may be transferred to such farm. Products from said farm shall first be used for supplying the state prisons, prison camps, or the prison farm and any surplus may be sold to any other state institution.