In researching how to better take care of my lawn, many articles recommend contacting your local extension for help analyzing soil samples. I've seen some commercial products to test the 'big four (N-P-K and pH) but, again, some reviewers suggest you just get help from your extension.
So, is this type of service available? How does it work, what's the turnaround time, and how much does it cost, etc?
Thanks.