Summary
This research illustrates a new procedure of analyzing data from soil- or agar-block decay tests using non-linear regression techniques to estimate a toxic threshold retention point for wood preservative chemicals. The model can be used to provide an objective estimate of the level of retention that is fully adequate, and can be applied satisfactorily to decay data from laboratory decay tests. This so-called broken line model procedure analyzes the decay data simultaneously by separating it into two different parts according to the threshold retention point. Such a procedure is preferable to previous methods which suffer from the need of transforming decay data. Our analysis can be performed in any statistical analysis package that includes a non-linear regression procedure, regardless of having a small or large data set, under the assumption that residuals are normally distributed with a homogenous variance. The method of estimating weight loss due to decay and the one due to operational procedure are also described.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received 26 August 1997
Rights and permissions
About this article
Cite this article
Gezer, E., Yalinkilic, M., Kizilkaya, K. et al. Estimation of preservative toxic threshold retention from laboratory decay tests: a new method. Wood Science and Technology 33, 63–71 (1999). https://doi.org/10.1007/s002260050099
Issue Date:
DOI: https://doi.org/10.1007/s002260050099