(2) The object of this section is to authorize the department to exchange isolated tracts of state lands for the purpose of accumulating larger and contiguous tracts of state lands. [Formerly 273.700; subsection (2) (1967 Replacement Part) enacted as 1967 c.421 §64; subsection (2) enacted as 1967 c.148 §2; 1969 c.594 §25]