Research Branch

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Compatibility improvements and bias reduction in height-age models

Author(s) or contact(s): G.D. Nigh
Source: Research Branch
Subject: Growth and Yield
Series: Research Report
Other details:  Published 1995. Hardcopy is available.


Inconsistencies between breast height age and adjustments for sectioning bias in stem analysis data may cause a bias in height-breast height age prediction systems. A further bias may be introduced when applying the model if the breast height age of the tree is taken to be the ring count at breast height. These biases can be removed by making the model and data compatible with the definition of breast height age.

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Updated October 24, 2008