lawn is thinning. If your yard seems to be thinning and you can't trace
any other obvious cause, such as a new source of shade or watering
changes, the reason may be soil compaction.
2. Lawn fertilizer doesn't do much
good anymore. When soil is highly compacted, the lawn fertilizer
nutrients are unable to reach the roots of
you fertilize but don't see much in the way of results, you may have
overly compacted soil.
3. You have a lot of runoff. Overly compacted soil doesn't absorb water
as well as soil with space between particles. If you're starting to see
more runoff than normal, and more rain or irrigation isn't the cause,
you may need to aerate.