 Re: Cassian Humphreys leaving stubs in Arbor Age Articles?
Ching - Chong - Choe - Chee - Chong - Ching
Hey, some of the latter replies almost sound Chinese !!
The main error in the first image seems to have occured by someone sliding the image out of place.
On either the image or the .pdf, what's labeled as the "top" of the branch collar is what I define as outside the branch collar. Top is top, bottom is bottom.
But Shigo's page is not what I would use. It's one area I'd improve on, because some branches angle downward on some trees, and what that pdf explains at "top" could easily be the "bottom". And that can confuse new people. And it's inaccurate based on the definition of words. So "top" equals up, and outside is outside - between trunk and tip.
Sometimes its darn hard to see the collars, so I quit using angles 20 years ago and just started to read the tree , not the angles.
There is the technical aspect of "callus" and there is also the figurative use of "callus". To say that something "callused-over" may not be equivilent to "callus".
Seems that various arborists alternate between the figurative and the literal. Either way, it's extra tissue stemming from cell division.
As far as the doughnut thing in the diagram, it makes sense to use that as an illustration of the perfect result desired. But I'm not sure if an unequal doughnut can be used as a guage of what was not cut right - not in every case. Lack or abundance of woundwood on one side or the other can be very dependant on the health and growth of the tissue on each side.
But in simple laboratory terms - it makes sense. |