This means air-layering in a process of developing roots by peeling bark off a trunk. The process involves rooting and taking the skin completely off the area from where the peeling is done. It is also called linking. Normally, the outer layer of the bark and cambium in width enough to prevent callus from developing and linking the skin is torn off to a width of about 1.5 times the diameter of the portion of the trunk to be peeled. After air-layering is finished, the pared area is covered spherically by Sphagnum moss and fastened by string to fend off dryness and accelerate rooting. Since the area is prone to take root when it becomes warm, it is better to keep the volume of Sphagnum low.

translated by Kyodo News