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timber posts and tree's! in The AnswerBank: Gardening
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timber posts and tree's!

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Agent_Smith | 10:49 Thu 26th Oct 2006 | Gardening
8 Answers
how come a timber post or any untreated or treated timber object will rot in the ground but a tree doesnt?
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trees are living things with roots and take nutrients from the earth, wood is dead!!!
A living tree is constantly re-generating as it is growing where as a post is already dead wood, when a tree dies it will also rot. It is only the outer part of the tree that is actually alive, the cambium and the bark the inner of tree is already dead and this will sometimes rot away leaving a hollow tree, I remember a large old oak tree when I was a child that we could climb inside due to it being hollow but the tree is to this day a large thriving oak.
mr. clever cloggs, lol.
The way I see it is, tree's are a bit like people, they have their own built in imune system that fights off attacks of diseases ie fungal, viral, physical etc. when a tree becomes very old, damaged or the envronment has changed, then the tree's imune system may become impaired and it can no longer protect it'self as well.

Re the untreated post it will start to rot quite quickly as it has no renewable barrier/s to fend off the the attacks of fungi etc that feed on the wood, only a residue that is left behind from when it was alive. Most but not all fungi feed on dead wood and feed mainly on the 'Lignum' content, the stuff that gave the tree/wood it's stregnth, that why you can easilt crush a piece of rotten wood in your hand. Other things like resins in the tree/wood will help protect it, western red cedar contains lots of it and is one of the most durable of all woods. Regards Tbird+
I used to be a tree surgeon!!
Me too Ratter, I was struck off for amputating the wrong limb ;�)
That was a cracker Tbird!!!! cheers skylight
Thunderbird!! I never heard that one before!! I can hardly contain myself lol. its the way you tell em for sure!!

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