[Wonder Warthog]

"But modern farmers, soils scientists, and ag engineers do. It's just that not all farmers practice the proper methods as they sometimes don't pay as much in the short term."

Yes, but this appears to be a newer and quicker means to do so.

"Have to have some beans or other crop that hosts nitrogen fixing bacteria, maybe peanuts?"

Not necessarily. These soils "could" host soil microbes that accomplish the same thing.

It's an area that definitely needs more thorough research.

[DavemeisterP]

Hey, what if the darkearth was created using bloodletting ceremonies from across the Amazon? Sounds pretty odd, but blood is regenerative, and there were such ceremonies in South America. Am I nuts, or is this a possibility?