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  1. #1
    Join Date
    Oct 2008
    Location
    Victoria
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    57

    Default water ratio to wood in growing tree trunk

    I've yet to see a simple answer to this question :
    If I'm standing in front of a growing and established eucalypt tree how many kilograms of water are in a cubic metre of the trunk ?
    All i've had so far is a comparison with kiln dried wood that evades the simple question. I'm not after a 1000 word thesis on the subject.
    All help will be appreciated.

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  3. #2
    Join Date
    Oct 2011
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    Jimboomba. Qld
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    Default

    Varies, depends on the Season and how much rain there has been recently.

    Apart from "Cos'" why do you want to know?

    Cheers

    Steve

  4. #3
    Join Date
    Jul 2005
    Location
    Oberon, NSW
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    13,360

    Default

    In the past I've been told that some fresh cut gum's are up to 4/5 water. I've no idea if this is true or not, but if you take it as an upper limit, then 80% of the m³ is water... which makes it up to 0.8 tonnes!

    I suspect it'd be best to take that with a grain of salt. (OK, OK... several kg of salt! )
    I may be weird, but I'm saving up to become eccentric.

    - Andy Mc

  5. #4
    Join Date
    Feb 2006
    Location
    Perth
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    27,795

    Default

    It varies widely according to the species, age, and a bit on the time of year.

    According to the Forest Products Commission.
    For Spotted gum Green density is about 1150 kg/m3, the air-dry density about 970 kg/m3, and basic density about 790 kg/m3
    The difference between green density and basic density is the water - in the case of SG it is about 360 kg/m3.

    For young Tassie blue gum its about 500 kg/m3

    Sugar gum is about 350 kg/m3

    Stringy is about 330 kg/m3

    Jarrah is 400

    Pinus radiata is 500

    Marri is 550

    96 words not including this sentence - is that OK?

  6. #5
    Join Date
    Oct 2008
    Location
    Victoria
    Posts
    57

    Default Water to wood ratio

    Quote Originally Posted by fineboxes View Post
    Varies, depends on the Season and how much rain there has been recently.

    Apart from "Cos'" why do you want to know?

    Cheers

    Steve
    Thanks fineboxes.
    I think "cos" sums it up nicely.

  7. #6
    Join Date
    Oct 2008
    Location
    Victoria
    Posts
    57

    Default water to wood ratio

    Quote Originally Posted by Skew ChiDAMN!! View Post
    In the past I've been told that some fresh cut gum's are up to 4/5 water. I've no idea if this is true or not, but if you take it as an upper limit, then 80% of the m³ is water... which makes it up to 0.8 tonnes!

    I suspect it'd be best to take that with a grain of salt. (OK, OK... several kg of salt! )
    Thanks Skew.
    That sure is a lot of water !!

  8. #7
    Join Date
    Oct 2008
    Location
    Victoria
    Posts
    57

    Default

    Quote Originally Posted by BobL View Post
    It varies widely according to the species, age, and a bit on the time of year.

    According to the Forest Products Commission.


    The difference between green density and basic density is the water - in the case of SG it is about 360 kg/m3.

    For young Tassie blue gum its about 500 kg/m3

    Sugar gum is about 350 kg/m3

    Stringy is about 330 kg/m3

    Jarrah is 400

    Pinus radiata is 500

    Marri is 550

    96 words not including this sentence - is that OK?
    Thanks Robl.
    that's good enough for me !!
    And nice and breif !!

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