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Pine/oak and soil acid

Discussion in 'Organic Lawn Care' started by Smallaxe, May 4, 2008.

  1. Smallaxe

    Smallaxe LawnSite Fanatic
    Messages: 10,082

    There is a deep rooted belief that pine needle impart acid to the soil before, or as, they decay.
    I have read that the tanic acid of oak leaves actually leaches into the soil before it decays.
    When either of them are decomposed they become closer to neutral like any other compost.
    Is any of this true?
  2. GreenthumbGA

    GreenthumbGA LawnSite Member
    Messages: 191

    That is a super question. 90 percent of trees around here are pine or oak. I have heard these same things.
  3. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    Generally speaking, it is a myth.
  4. treegal1

    treegal1 LawnSite Gold Member
    Messages: 3,911

    I agree, urban myth, after 300 years of acid production, how would the tree survive, yada yada cycling.... if it is that acid there would be a acid soil present, in my forests. cant say about yours??
  5. Smallaxe

    Smallaxe LawnSite Fanatic
    Messages: 10,082

    Thanks guys. :)
    That helps build confidence, in what I have learned makes sense.

    I suppose the tanic acid breaks down as simply as does, acetic acid (vinegar) and has no lasting effect on that soil itself.

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