Decay Detection Recap

As a first measure we would use a ............... to assess the extent of decay

• Sounding Mallet and steel probe

• Resistograph

• Sonic Tomograph

• TreeMotion Sensor

A Resistograph

• sends sound waves through the stem to analyse the structure of the wood

• uses small sensors to assess the root zone movement

• measures the strength of the wood by its resistance to drilling

A Sonic Tomograph

• uses small sensors to assess the root zone movement of the tree

• measures the strength of the wood by its resistance to drilling

• uses sound waves to analyse the internal structure of the wood

A good way of alleviating weight stress on a hollow stem could be........

• Removal of deadwood

• Crown lifting

• Crown reduction

What ratio of healthy wood is required in a stem to support the weight of a tree?

• 1/3

• 3/4

• 1/2

• 1/4