Periodic annual increment: Difference between revisions
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Periodic annual increment (growth), or PAI for short, is the change in the size of a tree between the beginning and ending of a growth period, divided by the number of years that was designated as the growing period (Avery, 339). The graph of PAI increases rapidly and then quickly declines after cresting. |
Periodic annual increment (growth), or PAI for short, is the change in the size of a tree between the beginning and ending of a growth period, divided by the number of years that was designated as the growing period (Avery, 339). The graph of PAI increases rapidly and then quickly declines after cresting. |
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===Equation=== |
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<math>PAI=(Y2-Y1)/(T2-T1)</math> |
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Revision as of 21:31, 24 March 2008
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Definition
Periodic annual increment (growth), or PAI for short, is the change in the size of a tree between the beginning and ending of a growth period, divided by the number of years that was designated as the growing period (Avery, 339). The graph of PAI increases rapidly and then quickly declines after cresting.
Equation
References
Avery, Thomas E., Harold E. Burkhart. Forest Measurements, fifth edition. New York, New York: McGraw-Hill, 2002.
Chapman, Herman H., Forest Mensuration, second edition. New York: John Wiley & Sons, Inc., 1921.
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