Without question, we have barely begun to properly exploit the food producing capacity of our trees. Even better we actually need those trees in order to enhance our open field agriculture in the best way possible.
Here is a good intro to what we can squeeze from what we already have.
I do observe that most leaves are generally bitter, yet this is a characteristic easily adjusted as well. Add fermentation and we have a lovely feed-stock to at least feed animals. In short, we have not barely begun to think it out.
And simply having massive forests of pine trees producing high quality nuts is eminently practical now. Choice species are available.
[ perfect for grafting larger nut bearing stems.]
[ soaking in cold water will strip out the tannin s. Grind the acorn seeds first to do this - arclein ]
[ this super common and quick growing so well worth trying. arclein ]