I found a pdf of the method, and EGW's description, and the more modern description that seems to adapt what was originally stated.
Here is the pdf link to the modern adapted method and how EGW stated the method used then in Australia, where she was at at the time (drained swamp land.)
EGW method - modern PDF
the youtube of the modern adapted method
The Ellen White Method of tree planting as is described by EGW in the PDF - rocks, rich dirt, dressing (barn yard manure )
I will try both methods (rock/rich dirt/big hole/barnyard manure) and (the method adapted in the pdf / video ) when I purchase new fruit trees and keep you posted. Both fruit trees will be the same variety planted on the same day.