my lawn has several low, soft spots in there. I am afraid the ground may give away. What or how can I fix this?
I am not sure what you are referring to about the "ground giving way". If you are wanting to fill those low soft spots you can use a good topsoil or lightweight loamy soil mix. If you have concerns about these being deep cavities or some other such problem you may wish to contact your County Extension Office and ask about options for investigating these areas further.