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Chronological Thread  
  • From: "John D'hondt" <dhondt@eircom.net>
  • To: "permaculture" <permaculture@lists.ibiblio.org>
  • Subject: Re: [permaculture] Humus
  • Date: Tue, 15 Nov 2011 19:44:38 -0000


Sorry Dieter,

The only reference I have at hand would be from Odums, "Fundamentals of ecology" a book that is never far from my hand. As Lawrence knows, I am very bad in keeping track of everything I read otherwise. I spend an hour or two on the PC every day during which time I read hundreds of pages. I simply can't keep track of sources for that would mean keeping many megabytes every day.
I tend to remember ideas but forget about autor's names or where they wrote it.
As I said I did some little bit of work on humus in another life and found that Odum was correct in stating that it does not matter much which vegetable feedstock is used in humus production. Of course the mineral content will differ but the general shape and form of the humic acid molecules is the same.
As to animal manures, I definitely remember articles by archeologists who excavated medieval middens and found proof of which animals were being kept from the chemical analysis of the black stuff in the pits. In one case pigs and in another site sheep. To find out more archeological articles are where to look. Can't say more for my memory is not that good.
John

-- On Mon, 11/14/11, John D'hondt <dhondt@eircom.net> wrote:
It is almost impossible to find out afterwards whether broccoli
heads or rice bran was used in humus production.
In contrast, when animal manures are included it is still
possible even after a hundred years (and often much more) to
determine exactly which animal contributed to the fertility.

Do you have any reference for this?

Dieter
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