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  1. Thread: Dr. Tim

    by DrTimPerkins
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    Nothing to report at this time. Sorry.

    Nothing to report at this time. Sorry.
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    There is that possibility for many things in...

    There is that possibility for many things in maple. In this case, I doubt there would be any difference. There is no reasonable physiological mechanism I can think of that might cause a difference.
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    That is correct. Sap coming out of the RO might...

    That is correct. Sap coming out of the RO might be a bit warm depending upon how hard you're squeezing it, but the air temperature is generally fairly low, so the compressor isn't working too hard.
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    That is correct. We did not assess spout heaving...

    That is correct. We did not assess spout heaving (although there was none). The study was done on natural vacuum using 3/16" tubing and polycarbonate tubing spouts.
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    Note that I cannot certify that there is no PFAS...

    Note that I cannot certify that there is no PFAS in your or any particular syrup without it being tested, however in the testing that the Vermont Department of Environmental Testing did of maple...
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    I assume you mean heat exchangers? If so, we did...

    I assume you mean heat exchangers? If so, we did some work several years ago using hot water off the Steam-away to preheat incoming sap. It raised the efficiency by a good amount. I do know some...
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    It depends almost entirely on the substance in...

    It depends almost entirely on the substance in question. PFAS compounds don't seem to be taken up by trees. Neither is lead. Some pesticides are translocated systemically in the tree. The best...
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    Typically there is an inner tank, with...

    Typically there is an inner tank, with refrigeration built-in (mostly on the bottom), then insulation, then an outer tank.

    https://www.youtube.com/watch?v=CXpZNVrdSo4

    If you're not using the...
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    Note that this is an approximation based upon a...

    Note that this is an approximation based upon a pure sucrose solution. The formula is embedded within the chart. There will be some variation based upon other substances in the concentrate (other...
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    For us, adding a refrigerated bulk tank has been...

    For us, adding a refrigerated bulk tank has been a real game changer. It has almost completely decoupled the RO concentration and boiling process. We may concentrate 20-25 times each season (to a...
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    A good deal depends upon age and condition, size,...

    A good deal depends upon age and condition, size, availability, compressor specs and condition, and demand in your area. Working units are typically in the $2-5/gal range. Check Craigslist in your...
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    tap straight in or at a slant?

    Do you tap straight in or at a slant?

    https://www.themaplenews.com/story/tapholes-–-straight-or-slanted-the-sap-doesnt-care/303/
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    Interesting

    Interesting
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    What are the factors that you can use to guess...

    What are the factors that you can use to guess relative sugar content of a tree?

    It is difficult to predict the SSC of a tree. Big trees with wide crowns growing on good soils are best, but there...
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    Funny that Dr. Abby and I were just talking about...

    Funny that Dr. Abby and I were just talking about this earlier today.
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    maple research

    Looking for input....

    Keeping in mind that depending upon the question, the funding, the time we have available, and interest...

    What types of questions do you have that you think we might be...
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    Maple Videos

    Hi Folks,

    Most of you have probably seen the videos https://www.youtube.com/channel/UC2KD4Pw_9JgJT749KgnE-aA we've been doing. I hope you've been enjoying them and learning something in the...
  18. Two new UVM PMRC videos in the "Keys to High...

    Two new UVM PMRC videos in the "Keys to High Yield Maple Production" series...

    Modern Maple Vacuum Tubing Systems https://www.youtube.com/watch?v=c6lpMgsfF-c

    Economic Impacts of Hitting Stained...
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    These types of issues can be notoriously...

    These types of issues can be notoriously difficult to diagnose and to eliminate. You already know the two most likely culprits - niter or biological. As Sean (Woodville) suggests, it very likely...
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    Unfortunately I believe that is the same weekend...

    Unfortunately I believe that is the same weekend as the Lake Erie Maple Expo (PA). Might make it a bit difficult for attendees and vendors.
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    Typically sanitizers are made with either...

    Typically sanitizers are made with either isopropyl alcohol or denatured ethanol. Other additives vary considerably (moisturizers, scents, thickening agents, etc.).

    Maple producers in Canada are...
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    Two choices (for plastic spouts in general). ...

    Two choices (for plastic spouts in general).

    1. Use a one-piece spout where the spout is put in the tree and connected to the tubing. After the season is done it is pulled from the taphole, cut...
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    It depends upon the time of the season and on the...

    It depends upon the time of the season and on the season.

    Typically sugar starts off a bit low, then tends to rise until about 1/3-1/2 way through the season. After that the trend is downward,...
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    We don't change drops unless the tubing or...

    We don't change drops unless the tubing or fittings are either breaking down physically, getting too short (from cutting off spouts each year), or we have to do it as a "control" for some experiment....
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    We always replace tees when replacing drops. If...

    We always replace tees when replacing drops. If you try to cut the tubing off the tee, a certain percentage of them will have microleaks no matter how careful you try to be. Under high vacuum...
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