How to rid a lawn of surfaced willow tree roots?

To rid a lawn of surfaced willow tree roots, start by cutting the roots as close to the trunk as possible using a sharp saw or pruners. Apply a root killer or herbicide specifically designed for woody plants to the cut surfaces to discourage regrowth. After a few weeks, you can dig out the remaining roots and fill the area with soil. Additionally, consider planting grass or other plants that can help stabilize the soil and deter new root growth.