Land dedicated to or acquired for the use and benefit of the permanent school fund may be traded to:
(1) aggregate sufficient acreage of contiguous land to create a manageable unit;
(2) acquire land having unique biological, geological, cultural, or recreational value;
(3) create a buffer zone for the enhancement of already existing public land, facilities, or amenities; or
(4) acquire land for the use and benefit of the permanent school fund as determined by the board to be in the best interest of the fund.