Q: My son was in the backyard playing soccer, and he must have hit a sprinkler head. The sprinkler now wobbles from side to side, and when the water comes on it’s like Old Faithful. How can I fix it?

Q: I’ve noticed two things about my lawn. First, there’s an area that is really green and much taller than the surrounding grass; and second, this same area is very soft. I know something is wrong, ...