The ring is formed with a "T" junction. Plug the tail of the T into the feed line of the drip system, then close the circle around your tree. You have the option of doubling the ring around the tree or extending it out as a single ring. For your young trees, a double ring is useful to make sure the water is reaching the roots. Once the tree's canopy extends out past the drip circle, open it up to a single loop.