One other thing I notice a problem with species, such as tamarind in your country, is fungal attack. We use a lot of similar methods like you, but an abundance of uncomplicated wood will just create a lot of fungal mycelium under the soil . Truthfully this makes the most amazing soil you will find, but if you are growing trees, be aware they might get attacked and sometimes it's not aparent sometimes for year but in the end there is often huge crop loss and/or death.
If your using wood bits, I would let it all wit and work away for a year or more before growing woody tree species in the tropics
