Jump to content
Tommy Hutchinson

The Visual Tree Assessment One-Third Rule: Frequently Applied, but Mostly Irrelevant

Recommended Posts

Like most tree related 'rules', T/r is just a starting point in an assessment and shouldn't be followed blindly. Lots of veteran trees around with small crowns and a T/r of 0.1 that have stood for decades or longer. 

  • Like 2

Share this post


Link to post
Share on other sites

I would say its once trunk has stopped putting on girth. As internal decay will eventually catch up with the cambium. K

Edited by Khriss
( long after i am gone hehe)

Share this post


Link to post
Share on other sites
On 11/01/2020 at 10:26, Gary Prentice said:

Like most tree related 'rules', T/r is just a starting point in an assessment and shouldn't be followed blindly. Lots of veteran trees around with small crowns and a T/r of 0.1 that have stood for decades or longer. 

The only time it should be a starting point is when a tree has perfect cylindrical residual wall which is closed. And how many hollowing trees have these features?! 

 

Arborists have been using the t/R ratio for decades unbeknown to the lack of scientific credibility and its near uselessness for predicting tree failure.  

Edited by Tommy Hutchinson

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Featured Adverts

About

Arbtalk.co.uk is a hub for the arboriculture industry in the UK.  
If you're just starting out and you need business, equipment, tech or training support you're in the right place.  If you've done it, made it, got a van load of oily t-shirts and have decided to give something back by sharing your knowledge or wisdom,  then you're welcome too.
If you would like to contribute to making this industry more effective and safe then welcome.
Just like a living tree, it'll always be a work in progress.
Please have a look around, sign up, share and contribute the best you have.

See you inside.

The Arbtalk Team

Follow us

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.