I suppose some universities might lean in the direction of testing soil
for farm crops, especially in states that are focused on agriculture.
However, here in Wisconsin at least, you can specify the "crop"
recommendation you need from a list of 9 categories that break down to
41 specific crops. For example, there are 41 crops listed in the fruit
That said, I agree with an earlier poster that there are many other
conditions besides soil quality, and I suspect that soil quality is
usually the last on the list of culprits.
So then, the lawn: If there are a lot of trees or the trees that are
there have heavy canopies, it could simply be that the lawn doesn't get
enough sun or water to thrive. If there is heavy shade, make sure
you're growing a grass that's suited to shade. Even then, you may have
to water manually if the area under the trees is blocked from getting an
inch of water a week.
Then the dying trees: Someone else raised the questions of what makes
you think they're dying, what type of trees, where do you live, etc.
That info would help a lot to get a better idea of what might be going on.