Hey Cecil, I have one concern about your idea. Are the birch stumps dead dry? or are they still green? I ask because in my
experience birch can be quite prolific. When i was about 13 my father had a piece of birch wood in our
firewood pile that he noticed had sprouted a couple leaves. So he buried the foot long junk just under the sod in our front
yard. That was 15 years ago, now the result is four- thirty foot tall birch
trees stemming from the same spot!!
So what I'm trying to get at is, if your stumps aren't completely dead and dry then your
hugelkultur may eventually be tooken over by birch saplings, which would be great if you were a rabbit! but not so good for the wood-be hugelkulturist.
p.s. this is my first post on this forum, although I've been reading it for months. I just wanted to extend my gratitude to Paul Wheaton and all who participate on here. I'm very thankful for this gem and the treasure-trove of information within.