This is only part of the area, the rest looks pretty much the same. I have aerated the lawn every year so air shouldn't be the reason they are surfacing. The tree is sided on two sides with blacktop or road. We get plenty of rain so water shouldn't be an issue either. This past week I took out the quill on my mower, don't even want to talk about the blade I have to do something with them. If I can't cover them with topsoil, and I'm not supposed to cut them off, what do I do???????