You plant them just like you plant any other tree. Just dig a hole in the ground and put the sappling in the hole and cover it up. You can do a net search and it will give you step by step instructions on planting them and all the information will be printable.
Dig a hole twice as wide as the root ball, but no deeper. Remove the container and all wires and ties. Place the tree in the hole, backfill, and apply bark or wood chip mulch. Plant no deeper than the tree was in the nursery.