The Department’s Superconducting Super Collider land acquisition program may provide for compensation in excess of fair market value to the owner of any farmland, as defined in Section 1-60 of the Property Tax Code, which farmland is acquired by the Department for purposes of constructing the Superconducting Super Collider. However, only farmland which has been used as a farm for the 2 years immediately preceding acquisition of such farmland shall be subject to this Section. Farm dwellings subject to Section 10-145 of the Property Tax Code and other buildings and other improvements shall not be subject to the provisions of this Section. The Department in conjunction with the Department of Revenue shall conduct a study of farmland values since 1970 for all counties through which the SSC shall pass. The Department shall complete its study by December 31, 1988 and report its findings to the General Assembly. Upon completion of its study the Department shall develop guidelines by which it may compensate in excess of fair market value the owners of farmland acquired for the construction of the SSC.