I'm thinking about renting a trencher to put in some electrical and irrigation lines to various places around my property. I have to trench through some heavily treed areas. Do trenchers cut through, lets say 2"-3" roots very well, and does this effect the trees if they do cut them? I only really need to bury the lines about a foot and from my limited experience I haven't encountered too many roots at that depth.

I searched for this topic but didn't find anything.

TIA, Mark