Brian Clugston

This has me curious. Biodynamics that I know of are from a gentlemen in PA out of bradford. His tomato plants are amazing. But im looking for something short and "lame brained" to answer my question on this:I see Permaculture and biodynamic gardening interchanged a lot on some posts her at permies.
Are they both the same? is one a branch of the other?

Also on a side note: I know walnut trees have some sort of chemical that kills plants off. is the wood still good for beds or not?

And, not doing my due diligence in researching further I feel I have screwed up big time. ugh. Two years ago I I had two large oak trees felled. The one was 5ft in diameter. Chewed up a chain due to an old unknowing fence line straight through the center of it too. The larger split-able stuff was given to my dad for his fireplace.
The branches: some made it to the chipper, some a pile down below the bank from my house, and some into a pit three feet deep by 4ft wide by 12 feet long i dug in my garden as an experiment. Only I think I may have messed up. I keep seeing mounds now instead of pits. This year I got a mower with a bagger after i realized how much i can do with the grass and added some to the top of the pit to kill off the weeds that accumulated last year over the dirt filled pit. Thinking here was replenishing the nitrogen the wood sucked out of the dirt and stuff.
SO my question is this.....do you think i can still grow plants on top of this pit even though it isnt a mound, and  to mound over the grass what type of soil should i put on top to heap it up for growing?

kinda....but i was thinking with the duct work starting at the bottom and winding its way up to the top inside kinda like an old wooden marble machine toy, then filling in the wall with stone or something. instead of an giant open center.

So I bought the dvd sets and Love the info off of them.
As I'm going through these i don't see something that I'm  curious if anyone has tried. Most of the piping runs on an incline then to the stack.
And all the pipes run in a mass for sitting on , etc. Has anyone tried to do a vertical mass against a wall?
My thinking is if someone had a basement like a dirt floor basement, running the pipes so they zig zag up the sides of the wall, then packed in with cob, masonary work or what have you creating a radiant heat in the basement that warms the floor above or something to that effect.