Dear Birjit,
Please have a look at this useful researchgate link and PDF attachments.
Good luck
Please have a look at this link also.
https://www.researchgate.net/post/Determining_the_exact_age_of_a_tree/1
Go through these links, it may help you
http://www.sciencebug.org/docs/Measuring_the_Age_of_Trees.pdf
http://onlinelibrary.wiley.com/doi/10.1029/96RG03526/pdf
http://www.chilternsaonb.org/uploads/files/AboutTheChilterns/Woodlands/The_Why_and_How_of_Tree_Measurement.pdf
Kindly see this also..
http://www.wikihow.com/Determine-the-Age-of-a-Tree
Check here too..
https://www.michigan.gov/documents/dnr/TreeAge_401065_7.pdf
Nice discussion on a v ery good topic..
Trees have different growth rates, depending on their species. A red maple with a 10 inch diameter and competing with other forest-grown trees can easily be 45 years old while a neighboring red oak with the same diameter would only be approximately 40 years old. Trees, by species, are genetically coded to grow at about the same rate under similar conditions.
A formula was previously developed and used by the International Society of Arboriculture (ISA) to predict and determine a forestland tree's age. Running the calculations and comparing them to a species growth factor is regionally and species specific so these should be considered very rough calculations and can vary by region and site index. The ISA says that "tree growth rates are affected tremendously by conditions such as water availability, climate, soil conditions, root stress, competition for light, and overall plant vigor. Further, the growth rates of species within genera can vary significantly." So, only use this data as a very rough estimate of a tree's age.
If you are using circumference, you will need to make this calculation to determine the tree diameter: Diameter = Circumference divided by 3.14 (pi). Then calculate the age of a tree by multiplying the tree's diameter by its growth factor as determined by species (see list below): Here is the formula: Diameter X Growth Factor = Approximate Tree Age.
Let's use a red maple to calculate age. A red maple's growth factor has been determined to be 4.5 and you have determined that its diameter is 10 inches: 10 inch diameter X 4.5 growth factor = 45 years. Remember that the growth factors I provide are more accurate when taken from forest grown trees with competition.
Very good information by Dr. Srivastava sir. Sir , whether such growth factors are also available for fruit trees? Whether circumstance is to be measured at breast height or trunk base?
Dear Sir,
Srivastava, I have found and collected Citrus indica in Manipur. If you are interested go to my project profile.
Good, can you please elaborate on the habitat of Citrus indica, so interesting...
In perennial trees, we usually measure the thickness of both scion and rootstock to see the response to inputs and scion girth just above the bud union will give the age of the trees, which comes through experience , not a concrete method at all...Dr Anshuman Singh ..
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