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Thread: Need Opinion on Tapping Big Old Trees Previously Tapped by Others

  1. #21
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    Quote Originally Posted by blissville maples View Post
    Also on these larger trees I usually add a third tap for two reasons. 1 if one tap does hit less than par wood you hopefully have 2 others on a 30" tree and not one. 2. 2 taps on a tree this size is simply not enough (unless your simply trying to impress everyone with your high gpt numbers) if you have a short run of 4-6 hrs you at times won't exhaust all of the sap potential for that day. I like the example of a bucket of water one with one hole and one with three holes under a given amount of time the one with a single hole may not completely empty whereas the other would. This can apply to a tree.
    By this logic shouldn't you be putting at least two taps in every tree? And given that trees are not buckets, I fail to see how your analogy is relevant here...
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  2. #22
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    Quote Originally Posted by GeneralStark View Post
    By this logic shouldn't you be putting at least two taps in every tree? And given that trees are not buckets, I fail to see how your analogy is relevant here...
    Don’t think that was needed...Dr Perkins covered it very well already... do hope sap starts pretty soon.
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  3. #23
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    Quote Originally Posted by GeneralStark View Post
    By this logic shouldn't you be putting at least two taps in every tree? And given that trees are not buckets, I fail to see how your analogy is relevant here...
    Not if you understand that a tree of larger diameter will have more liquid to extract, with that said a smaller tree does t require more taps to evacuate all the sap. If you've ever looked at the analysis, and frankly use common sense, larger trees have a lot more liquid in them obviously because of their size. But yea dr Tim explained it well.

    It's like a keg of beer takes a lot more people to empty one versus a bottle!!

    Trees are not buckets you are right, it represents a column of water....I suppose if I said a Culver that would of made it clear!! More or less every hole in a tree, bucket, column of water, gas tank, swimming pool whatever analogy you'd like to use will empty whatever reservoir it punctures more quickly than less holes. It's a fairly simple analogy.

    Same as Doctor Tim explained between quarter and 5/16 taps there is I believe around a 40% difference in hole size between the two. Obviously one will evacuate liquid quicker than the other, which I didn't think would make a big impact but im about to find out!
    Last edited by blissville maples; 02-10-2021 at 07:30 AM.
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  4. #24
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    Analogies are never perfect, but just simple ways to get the main concepts across. Obviously trees are a lot more complicated than hollow pipes stuck in the ground, but the example works fairly well for a lot of things.
    Dr. Tim Perkins
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  5. #25
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    I ended up doing 2 taps on trees at about 22 inches and up. I used a mathematical analysis rather than scientific.
    I'm using 40" drops and assuming a 30 deg shallowest angle, you get a reach of about 35" around the tree. So it can reach 35" in either direction, or 70" circumference which is a 22" dia tree. A single drop on larger trees would not reach the entire tree.

    Even run flat, a 40" drop would only cover a 25" tree.
    Last edited by TapTapTap; 02-16-2021 at 05:35 AM.
    Ken & Sherry
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  6. #26
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    Quote Originally Posted by TapTapTap View Post
    I used a mathematical analysis rather than scientific.
    You used both...math is a science. Either way you look at it, the reasoning is sound.
    Dr. Tim Perkins
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  7. #27
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    Quote Originally Posted by DrTimPerkins View Post
    You used both...math is a science. Either way you look at it, the reasoning is sound.
    You're right. But I'll take it one step further - It's engineering. A combination of math, science, economics, practical experience, and common sense.

    Ken
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  8. #28
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    Quote Originally Posted by TapTapTap View Post
    You're right. But I'll take it one step further - It's engineering. A combination of math, science, economics, practical experience, and common sense.

    Ken
    tou·ché sir...
    Dr. Tim Perkins
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  9. #29
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    I did about 20 percent taps below the lateral. It takes a little getting used to when you're scanning the woods. First glance looks like it's not plugged in and needs to get fixed.
    Ken & Sherry
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  10. #30
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    Yes...it does look odd at first, but I bet you didn't hit a bit of stain during tapping...which is exactly the reason to do it. Let me know what you think of the approach after the season is over Ken.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
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