Welcome to the organization excaliburista!
Mat cultivation varies. A practice I use is a main pseudostem and two pups on each mat. I try to "space" them, so #1 pup is half the size of main stem and pup#2 is half the size of pup#1. I give extra pups enough time on the mat to start to develop roots. I then remove them to start another mat. Therefor mat pruning is continuous. There are variations of this practice, so develop your own method according to your growing conditions, and growth rates.
If there is limestone your pH is slightly to very alkaline. Find out what it is, bananas like slightly acidic pH, lots of organics will help, but make sure good drainage is maintained.
Watch and find out what the locals are doing and why (in terms of banana cultivation).
I hope this helps. Best wishes and welcome to the organization!!
