That's a beautiful root and awesome plant as well, no offense but the root KIND OF looks like it has had some fertilizer applied maybe once or twice as the rhizome is very fat in comparison to the size of the main root and the roots are way to SMOOTH, of course i am SURE i am wrong, just saying...beautiful root!!
another beautiful root !! and like i said i am quite sure i am wrong!! By the main roots being so very smooth it would imply that the soil those roots were growing in was extremely loose,..great roots brother