I was wondering, how many of you use the 'soil layering' method for your trees, where you use larger soil particles in the bottom ,medium in the middle and smaller on top? I know that there is hearsay that doing so helps keep the moister more in the center level of the pot for better health of the tree, but is there any real evidence of it being more beneficial? I have never done this and have never seen a reason to or wanted too due to the extra hassle, but just wanted to hear what some of you have to say about the matter.