Quote:
Originally Posted by PR-Giants
Biochar/horticultural charcoal has a high cation ratio
Perlite has a cation ratio of zero
Moisture is also important for plants and biochar/horticultural charcoal holds much more moisture than perlite and lump charcoal holds very little.
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Those are theoretical reasons to use biochar, not empirical. Why don't you just perform an experiment that shows that biochar is better? Just plant two identical plants in pots, one with biochar and one with perlite and let the plants grow. It doesn't even have to be bananas.