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Thread: tera preta - the secret of el dorado

  1. #1

    tera preta - the secret of el dorado

    excellent documentary the secret of el dorado
    early spanish explorers reported a vast and thriving community in the amazon basin
    later explorers failed to find any trace of it so it was assigned to legend

    this doco reports the work of more recent scientists, focusing on "tera preta', black earth
    it is a type of very dark, fertile human-modified soil found in parts of the amazon basin

    - very high charcoal content
    - made by adding a mixture of charcoal, bone, and manure to otherwise relatively infertile soil
    - very stable and remains in the soil for thousands of years.

    some believe it can be replicated in almost any soil and may play a vital role in future food production

    enjoy

    The Secret of El Dorado | Watch Free Documentary Online

  2. #2
    Networking Architect Aaron Murakami's Avatar
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    Steve,

    Thanks for posting that - one of my favorite vids.

    I put rock dust, biochar, mychrorrhizal fungus and earthworms in my garden and it made a huge difference.

    I don't think I had it good enough for the earthworms to take the biochar and fungus down deep into the ground to get it to "self replicate" itself, but I believe it is possible to replicate that effect.
    Aaron Murakami





    You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete. ― Richard Buckminster Fuller

  3. #3
    I have read that terra preta also included man-made ceramic material. I might have read that in the book "1491". An excellent read if you are interested in pre-colombian history.
    "It's not a mutiny if the commander is leading it!" - Wally Schirra, Commander Apollo 7

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