Which tools are commonly utilized in tree risk assessment?

Resistographs and sonic tomographs are vital tools in tree risk assessment because they provide valuable data on the internal condition of a tree. Resistographs measure the resistance of wood to a drill, offering insight into the structural integrity and density of the tree. This allows arborists to detect decay or defects that are not visible from a standard inspection. Sonic tomographs, on the other hand, utilize sound waves to analyze the internal structure of the tree, enabling the assessment of areas that may be compromised by decay or other issues.

These specialized instruments give a more in-depth analysis than a simple visual inspection could provide. While visual inspections are essential for initial observations and can often identify overt signs of risk, they do not adequately assess hidden problems within the tree. Therefore, the combination of resistographs and sonic tomographs enhances the accuracy and reliability of tree risk assessments, making them indispensable tools in the field of arboriculture.

The other options provided may refer to aspects of tree care or maintenance but do not specifically align with the detailed assessment required to thoroughly evaluate a tree's risk factor.