How can I take out a really stuck root?
I usually use a chainsaw to cut the major roots away and the pull the stump with my truck or tractor. If it is really large I would suggest you rent a stump grinder or contact a tree service to grind it below ground level for you.
rent a chainsaw or electric shovel
knife the bit of the roots you can now,the dig slightly around the root and as deep as you can,then try to pull it up from the edges
A plant root? Well if you have a water bottle, poor it over the spot so it turns muddy. You then can easily just take it out