ORIGINAL: Soilman

Mossbergman11, I would check out the MSU soil testing lab. They are a certified lab by the state of Ohio. They charge $10 for a routine field soil sample. P and K are very sensitive to the type of extracting solution used. Some out of area lab may not use the best procedure for your soil. pH results should be comparable at any good lab. Just giving you my 2 cents, not trying to talk you out of the biologic test. I have no personal experience or connection with either lab, not my neck of the woods.