Creating nebari/surface roots

I have been placing sphagnum peat around the trunk base on several of my twees.
Not sure where I picked that up, but the rationale is that it will encourage nebari or surface presentation of roots. I also have a inverted cup under my quince roots for better nebari. Can anyone contribute on this subject, please?

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Plates, discs, or cups that encourage roots to grow laterally can help with the formation of the eventual surface roots. As long as the cup is wide enough, it should be able to provide a nice surface for encouraging lateral root growth.

Keeping moss around the surface of the soil is great for encouraging roots to grow near the surface of the soil. If the soil near the surface moves around, roots cannot grow there. Do note that the moss can preserve a lot of moisture, especially in winter, which may result in the trees needing less frequent watering.