Jogro
Did I ever say that I was fixing deficiencies? I must of forgot that part. There aren't any deficiencies. It's simply to supply the micro's with a quick boost so that they can break down the food so that the plant may uptake it and use what it needs.
You implied that something was missing by saying explicitly that you needed molasses to "finish" your plants.
Put differently, if your soil weren't deficient in some way, (ie your plants already had everything they needed for optimal growth), then why would you need to add supplements of any kind?
What do you think will happen if you don't add molasses?
Since you're relying on Dr. Ingham as your reference, why don't we examine what she's actually saying? Your quote again:
Often soil tests will indicate that some nutrient is in low supply, [ie that's a "deficiency", right?] but merely by adding the appropriate bacterial or fungal species, these organisms will convert plant unavailable nutrients into plant available forms. Diversity is the key, however, as well as feeding that diverse set of species so they will perform their functions. If [bacterial] activity is low, then bacterial foods need to be added to increase growth rates and improve numbers.
So, in the excerpt you yourself posted, Dr. Ingram is saying that adjuncts like molasses are only necessary if:
a. There is a specific nutrient deficiency **AND**
b. This particular deficiency is caused by reduced bacterial (or other microbiologic) activity.
If both these things are true, then at that point, adding something like molasses might help fix your deficiency by boosting the number of bacteria.
Conversely, if you don't have a nutrient deficiency, or alternatively (and probably more likely) you do have one, but its not amenable to being fixed with increased bacterial activity, then adding molasses shouldn't do anything for you.
Hence my question above about what you think is missing from your soil that requires you to add molasses to it.
Note also, that Dr. Ingram says explicitly that if you did have this sort of problem, ideally you'd want to add a variety of different bacterial supplements, not just molasses. Molasses all by itself could be helpful, but only if it boosts the appropriate bacteria, and with a mix of organisms present, just molasses is probably not optimal.