[k_sze]

I wonder how much of this rhizophagy cycle applies to plants that don't really rely on the soil for nutrients. e.g. many of the insectivore plans (venus fly trap, pitcher plant, etc.).

In fact, if you try to plant venus fly trap in rich soil, it'll probably die.

[boomboomsubban]

Most of those plants would still rely on the soil for some nutrients, I assume their history in poor soil has just led to them developing additional ways to get some nutrients. Like vitamin d in humans.