No. Home soil test are notoriously inaccurate, except for those that only evaluate pH (and even then you must use distilled water, not tap water, to get an accurate reading).

They are not very accurate or useful. You use one to get a pH reading, what does that tell you? What do you need do to correct any problem it indicates? If the pH is below 6.0 how much lime per area do you need to apply (if any) to correct that. The same applies to Nitrogen, Phosphorus, and Potash. How much of what is needed (if any) to correct any imbalance?

Some soil test labs might give advice about how much of what over how much territory to correct imbalances and keep in mind that too much of one can interfere with a plants ability to utilize the nutrients that are there.

Oklahoma State University does a basic soil test )pH, P, K) for $10.00 per sample and your county office of the Oklahoma State University Cooperative Extension Service should be able to help you. http://www.oces.okstate.edu/

TY

I can't remember if the one I bought years ago was accurate or not. I doubt it.

I should have soil tested years ago. The one for my 2 y.o.homemade container mix showed a deficiency in Phosphorus (!) And copper. How in the world could I figure out something like that through intuition and experience?

The thing about guessing is that your previous wrong guesses make your subsequent guesses less accurate. Test every once in a while and find out.

The savings in unnecessary ferts is some mitigation of the expense. Getting it right this season, not next, is more valuable than that