i've had lots of success with bacterial innoculations in the garden, that is,
compost and worm teas.
i suspect you'd get that same effect, though at a lower population density than in a hyperoxygenated tea, and with less absorbtion, as it's not in liquid. otoh, you'll have introduction of more fungal and microfauna allies, both of which are likely to be slow to work, and may not take if they don't have the microbial foodsources they need.
i think innoculation is definitely a good idea, but i'd definitely couple it with a good drenching of compost/worm tea.