Tree Assessment, Benefits and Value

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I attended the Arizona Community Tree Council Conference this weekend. There was a lot of great information plus it was nice to see arborist friends who I don’t get to see too often.

One of the speakers was Dr. James Clark. His discussion centered around a question that does not have just one answer. It was “What is a tree worth?” What goes into valuing a tree?

  • Is it related to how we feel about the tree?
  • Does it have to do with the functions and services that the tree provides?
  • Is it in economic terms?
  • What about non-economic terms?

The International Society of Arboriculture (ISA) uses two methods to place a value on trees. The first one is the Replacement Method. This method attempts to place a realistic value on lost or damaged trees and plants based on their replacement cost. It is used for plants with up to an eight-inch stem diamater.

The other method is the Basic Formula Method. This method is used to figure the value of a tree that is larger than can be replaced with a nursery plant. This is used for plants and trees that have a stem diameter over eight-inches.

The proper evaluation of the monetary value of a plant or tree in the urban landscape is a site-intensive operation. Evaluating a tree needs to be accomplished in the field. Looking at the tree and its environment, best viagra pharm collecting samples, patient taking photos, sildenafil measuring and examining its parts, asking questions and being thorough are only one-half of the job. The other half of valuing a tree is more of an art. If you were to get two appraisals on one tree, it is very likely that you would get two different amounts for the value of the tree.

Trees are a valuable part of our landscapes and increase the value of property. Though this is true, it is not always clear how much value that is and how to evaluate it. There still needs to be some way to figure this value. And, these are just two ways that try to accomplish this.

Acacia Aneura

This is an Acacia Aneura also known as a Mulga tree.. It is native to Australia. It is one of my favorite non-native trees. It gets 14′-18′ tall and 12′-16’wide.  It grows fairly quickly and can take the cold down to 15 degrees. It does well in most types of soil and doesn’t require a lot of water.

I love the silvery leaves and the fact that it doesn’t need a lot of room. This makes it a good tree for a small front yard like many of our newer sub-division homes have.

Today is International Peace Day.

This day was established by a UN resolution in 1981 (resolution 36/67). It was first held on the third Tuesday of September, starting in 1982. And, beginning in 2002, the UN General Assembly changed the date, setting September 21st as the date for yearly celebration. (

The goal for this day is a day of non-violence and cease fire. A day of world non-violence is something to strive for.

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P.O. Box 30937
Tucson, AZ 85751
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