A logical, accessible approach to classification and identification. This peer-reviewed Guidance Note 14 is based upon scientific research and well referenced.
It covers the principles of branch junction physiology and morphology, from terminal and axial buds through growth during the tree’s life, including the incidence of natural bracing, to create a narrative that is understandable and logical, supported with numerous photos, diagrams and illustrations. From this clear structure the development of the different types of included bark in junctions is explained, facilitating informed risk assessment.
One of the most important benefits of GN14 is its clarification of terminology used to describe branch junctions. Given the importance of accurate communication concerning tree structures in tree-related reports, scientific work and for risk management purposes, this Guidance Note provides an evidence-based framework for the description of branch junctions in the many different forms in which they can be found.
There are three levels of description prescribed in this Guidance Note (simple, detailed and advanced) so that users of this classification system can choose the level of detail that needs to be recorded or reported.
Where this Guidance Note refers to a ‘detailed description’, this term is used to refer to the detailed and advanced descriptions of branch junctions, in contrast with a simple description. Only since 2016 has there been published evidence that a phenomenon known as ‘natural bracing’ can greatly influence the structural development and strength of branch junctions, so this guide is the first to incorporate that consideration within the reporting of tree structures. Overall, it is hoped this document is helpful in achieving a common language that can be used when reporting or discussing branch junctions in trees, for arborists, arboriculturists and other interested professionals. The language and terminology used are intended to be both logical and accessible.
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