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Author Topic: Sapping the moisture out of the log  (Read 482 times)

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Offline welderskelter

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Sapping the moisture out of the log
« on: September 14, 2021, 06:03:18 AM »
I cut some trees and left the log intact. Going to leave them till the leaves dry up. Hopefully that will draw sap out of the log, and my firewood. Does anybody have any thoughts as to how much this might help?

Offline HemlockKing

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Re: Sapping the moisture out of the log
« Reply #1 on: September 14, 2021, 07:15:10 AM »
Just use a vacuum cleaner with the noozle and suck the sap out the end grain!  ;D


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Offline moodnacreek

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Re: Sapping the moisture out of the log
« Reply #2 on: September 14, 2021, 08:02:02 AM »
With the butt cut off the stump and the top still on it will draw up sap. Should be dry enough for firewood.

Offline WV Sawmiller

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Re: Sapping the moisture out of the log
« Reply #3 on: September 14, 2021, 08:33:10 AM »
   Interesting concept.
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Offline newoodguy78

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Re: Sapping the moisture out of the log
« Reply #4 on: September 14, 2021, 08:48:31 AM »
Itís not as good as getting it cu ahead of time but I have done and noticed a difference. Certainly not going to hurt

Offline tawilson

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Re: Sapping the moisture out of the log
« Reply #5 on: September 14, 2021, 09:28:47 AM »
I do know that if you pluck a leave off the tree it dries up by the next day. It takes a week or so for them to dry up after you cut the tree down so they are getting moisture from somewhere. It certainly does no harm.
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Online mike_belben

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Re: Sapping the moisture out of the log
« Reply #6 on: September 14, 2021, 09:43:20 AM »
If you cut a wet tree down in spring right at emergence it will still leaf out as if its on the stump. Maple is particularly good at that.  Locust logs will actually shoot little epicormic branches right out of a log while laying in a pile. 
Isaiah 63:10

Online Don P

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Re: Sapping the moisture out of the log
« Reply #7 on: September 14, 2021, 03:25:19 PM »
There is a scandinavian name for this, which escapes me. In the south we just call it blue stain, but that's not going to hurt firewood. In air drying lumber some cells are living for weeks.
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Offline moodnacreek

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Re: Sapping the moisture out of the log
« Reply #8 on: September 14, 2021, 06:39:19 PM »
If you cut a wet tree down in spring right at emergence it will still leaf out as if its on the stump. Maple is particularly good at that.  Locust logs will actually shoot little epicormic branches right out of a log while laying in a pile.
Epicormic branches huh. You never stop amazing me.  Them are called suckers!

Offline stavebuyer

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Re: Sapping the moisture out of the log
« Reply #9 on: September 14, 2021, 06:47:11 PM »
It will work to keep the bark from slipping on White Oak in the growing season. I don't think it will affect the heartwood moisture content.

Online Don P

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Re: Sapping the moisture out of the log
« Reply #10 on: September 14, 2021, 09:48:29 PM »
Good point, the leaves are sucking up through the xylem in the sapwood, that's about the only direct connection. Then I think its just back to diffusion drying which is faster with the cover knocked off.
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Offline doc henderson

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Re: Sapping the moisture out of the log
« Reply #11 on: September 15, 2021, 10:09:58 AM »
the problem may be that when the leaves start to fail after cutting, they can seal themselves off from the tree.  this happens every fall.  the cut off at the joint where they will eventually separate from the tree.  we had a tool called "the bomb" when I did research at the University of Kansas, On a Kansas weed (no not that weed).  you put the plant in the chamber leaves down, and sealed around the stem with it sticking out of the tool.  you then pressurized the chamber and when sap started to push out of the stem, this reflected the negative pressure that transpiration had developed in the plant.  equal and opposite forces.  I do not think you can fit a tree in a chamber to withstand positive pressure, but maybe apply negative pressure to the fresh cut stump.  I agree it will only pull moisture from the intact open tubes.  like pulling sap for sugaring.  fun to try but not practical.  might work better on the log rather than the tree.  you can sometimes blow through a stick.  If I run out of projects, I might give it a try. 8) :)
I also had an elm log produce healthy looking leaves along the stump on the up side and they lasted for months, presumably from stored fluid and sugar.
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Offline WDH

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Re: Sapping the moisture out of the log
« Reply #12 on: September 15, 2021, 10:30:04 AM »
Epicormic branches huh. You never stop amazing me.  Them are called suckers!
Epicormic branches from adventitious buds  ;D
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Offline doc henderson

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Re: Sapping the moisture out of the log
« Reply #13 on: September 15, 2021, 10:36:56 AM »
just rolls off the tongue!   :o :D :P :)
Adventitious buds!  guess that makes us friends Danny!  God Bless.
timberking B 2000, 277c track loader, PJ 32 foot gooseneck, 1976 F700 state dump truck, JD 850 tractor.  2007 Chevy 3500HD dually, home built log splitter 18 horse 28 gpm with 5 inch cylinder and 32 inch split range with conveyor 12 volt tarp motor

Offline moodnacreek

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Re: Sapping the moisture out of the log
« Reply #14 on: September 15, 2021, 01:09:30 PM »
Epicormic branches huh. You never stop amazing me.  Them are called suckers!
Epicormic branches from adventitious buds  ;D.
To produce bird's eye locust :)

Offline Old Greenhorn

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Re: Sapping the moisture out of the log
« Reply #15 on: September 15, 2021, 01:23:01 PM »
If you cut a wet tree down in spring right at emergence it will still leaf out as if its on the stump. Maple is particularly good at that.  Locust logs will actually shoot little epicormic branches right out of a log while laying in a pile.
Epicormic branches huh. You never stop amazing me.  Them are called suckers!
WDH has been wearing me down over the years and I am starting to use some of (his) proper terminology here and there. Epicormic is the term that stuck first and hardest with me. I often can't remember an old friends name right away, but for some reason I have no problem recalling that term and I do trot it out from time to time. Now the parts of the leaves, lobe shapes, buds, bumps, and other stuff, well, I don't know that I will ever get that right. ;D
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Offline WDH

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Re: Sapping the moisture out of the log
« Reply #16 on: September 15, 2021, 02:52:50 PM »
Yes you will.  
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