I have cleared a patch of shrubs and trees. When we pulled the trees and bushes out we managed to pull most of the roots but some were too difficult to remove. I was just leveling the soil out today and found some roots with a white substance that coloured the soil when I moved it. On another root with the same white coating the 'bark' slid off the root when I pulled it.
I am also still finding some parts of root balls.
As I want to lay turf on top, are these roots anything to be concerned about?
I live in the south of England.