Q.When Modifying The Hardscape, Does A Person Have To Worry About Sufficating The Roots Of A Hackberry Tree?
I have several hackberry trees that are well established along a hillside. I plan on adding dirt at the base of the hill. I want to decrease the slope of the hillside making it easier for me to get down to the lower part of my property with a riding lawn mower. I worry that adding soil/material will suffocate the roots or harm the trees in another way. I have a string running up the hill; this is the center of where I plan to add the extra material. I also was planning on adding soil; is there something else you would recommend?

Certified GKH Gardening Expert
Adding soil is just fine, as long as you don't cover the base or crown of the tree.
These are very hardy trees and will not be killed off easily.