Brian Van Fleet
Pretty Fly for a Bonsai Guy
i read a post by cratageous bonsai, michael hagedorn s site, where he stated to put slow release ferts directly at the base of trees to help fuse maples nebari.
http://crataegus.com/2010/11/06/japanese-maple-once-again/
painter
I started doing that last spring and some fibrous roots are forming, but a little lower than I'd like...it is just going to take time. You might be able to see them in the second photo of post 46.