Cezilous, is there such a class? I keep telling my husband the land takes care of itself for the most part, but maybe I'm a bit too optimistic on that front?
Depends on you definition of "care"! Your location will determine the final appearance, but all land will eventually reach a stability point in one form or another with no human input. If you are starting with a mature ecology, it should pretty much remain the same, perhaps with some ocasional disturbance from heavy storms, fire, etc. If you are starting with previously cleared, or otherwise disturbed, land it will need to go through full succession before you reach stability. In our neck of the woods, that usually means impenetrable growth of non-diverse, less productive species, that take decades to thin out enough to even walk through.
I'd consider my land pretty heavily managed. I use livestock to clear underbrush and maintain fields. After the fences are built, they don't require too much of my time to maintain, but do require some attention every day or two to check water, health, etc. We cut dead trees for firewood (probably my most productive activity $ wise but hard dangerous work), build brush piles for wildlife, and are slowly adding more productive species, such as nut and fruit trees (long term investments!).
Now if I had wanted, I could have let it all go wild, maybe just maintaining some walking trails, hunting a bit of game, and ocasionally picking up some deadfall wood for a campfire. That would have been cool, too!