I have these really annoying green shoots coming up all over my backyard and they all connect to bigger roots below the ground. Also, whenever I dig to put in a new plant I’m finding these ovular-shaped tuber things. I’d like to know if the two are related, which tree they’re coming from and what, if anything, I can do about them. The tree circled in red is the one I suspect is the problem but I’ve included other possible culprits. Please let me know if you need any other information. Thanks in advance!