I'm not terribly familiar with northern forests, but if they are mostly evergreen, I would guess that the soil is most suitable for evergreens. I don't believe our diets include many foods that come from evergreens. And if our local pine trees can be a guide, they certainly make the soil beneath them very acid.. That's good for some food plants, but not all. I'll look into it if no one has an answer soon because, of course, as a curious science-tilted guy with a thirst for knowledge, "inquiring minds want to know".<quoted text>
Indeed, many think that because jungles are lush that jungle soil is rich. It isn't, in fact it's often rather poor. It's mostly the massive rainfall that helps create the growth.
Those who burn off jungle to farm the land rely on the ashes of the burnoff to help fertilize, and that usually only works for a couple of growing seasons. Then they have to move on and burn off MORE jungle, which perpetuates a vicious cycle.
And someone posted about the melting permafrost; that's a whole 'nother situation. That's land that's been frozen for thousands of years. What is its chemical composition? How suitable will it be for winter wheat or other cool climate crops, since it will still be many years before anyone could attempt to till that land?
And I would think there there is probably a considerable difference between the two great northern forests of North America and Eurasia. But I don't know.
To the books! To the Google!