No, at least not yet. Just by asking the questions you have, with the desire to answer those questions, will be beneficial to both you and your clients. There is a lot of scientific information backed up with field research to prove the appropriate application of a product.
This information can be quite blinding. What you need to do is to have the background to intelligently sift through what is being sold and evaluate its benefits to the application to which you plan on using.
Sorry this sounds all so vague but you are on the right track. The website I posted has a lot of good information. There are many others. Don't sweat the small stuff. You don't have to be a soil biologist, just have a good basic understanding of what is going on.
Dave