Hi, I've heard that it comes from Germany, (which you probably already guessed,) and that some Germans long ago were clearing a field and they noticed all of their excess
wood and they wondered what to do with it, seeing as how Germans don't like to waste anything and always find a purpose for everything. (Trust me I have very strong German heritage.) And so time went on and they noticed that the forest's soil looked better than some of the older fields soil. So, they inspected the forests soil, and noticed that it has at lot wood in it, so a few eurekas later you have
Hugelkultur.