The flora and fauna of the plane are unusually useful to those who farm them. Every part of a Bytopian creature (even a ni'ath) is useable. That's not to say that the plane encourages the farming of sentient life-it doesn't-only that the plane makes sure that every death gives back to life.
Beneath Bytopia's soil is an endless maze of truly enormous roots, more than can be explained by the vegetation above. A disproportionate number of the roots sprout from the realms of the gnomish gods. This seems appropriate since roots are a rock or forest gnome's preferred habitat. Others can only be explained as being the roots of the plane itself.
The roots of Bytopia are one of the primary ways that a plane as isolated as it is (with no major planar pathways) trades with other parts of the multiverse. It ties in with the theme of symbiosis so common there; Bytopia's roots take nutrients from other planes (including, it's rumored, the elemental ones) and deposit nutrients from their own planes as they complete their life cycle and die.
In addition, the inhabitants of the plane can build tunnels through the roots to get to places with desirable products. The corridors are winding and mazelike as the roots themselves, but no one ever said Bytopians didn't have to work for what they got. Some theorize that the plane of Bytopia is actually an infinite tree with roots both above and below, like a baobab, that follows the Tree of Life model. This would explain the plane's appearance, and it would explain places like CenterSpire (a baobob's roots connect the top to the bottom, like myriad trunks).
