All trustees, executors, guardians and other fiduciaries in this state (unless prohibited by the will, deed or trust instrument, or unless any such trust instrument prescribes other investments exclusively) and administrators may, in addition to investments otherwise authorized by law, invest all funds held in trust or for investment in farm credit securities without the necessity of any precedent order of the chancery court and no liability whatsoever shall be incurred by any such fiduciary in purchasing farm credit securities without a precedent order of court.