TREE CARE
Use of a resistograph tool for advanced decay detection .
evaluated with the overall diameter of the branch or trunk in mind . Some arborists are comfortable with the probe extending halfway into the tree ’ s heartwood , while others get alarmed if it goes in 1 / 5 or 1 / 4 of the way . Many arborists use 1 / 3 as a standard ; however , all — especially those with Tree Risk Assessment Qualification ( TRAQ ) credentials — take many other factors into consideration . Such factors include proximity to targets , the presence of other pests , the age of the tree , the softness of the wood related to species , and any abiotic factors involved ( cracks , leaning and co-dominant leaders ).
In addition to testing with a screwdriver , probing with a small-diameter drill can also be insightful . Of course , a drill bit can create or enlarge a wound on its own , but investigation of this type is usually worthwhile in terms of the information learned . If the tree is especially important because of historical significance , testing can be done by a Certified Arborist using a resistograph tool , ground detecting radar or sonic tomography .
The technique of “ sounding ” can be utilized , but it ’ s generally considered tricky to use . It involves using a rubber mallet being struck against the suspected area of decay and listening to the sound that occurs after striking . In many cases , the sound is described as a “ thud ’ or a “ hollow echo .” At best , sounding is a subjective determination and never used alone when attempting to determine if decay is present .
NEGLIGENCE You might be wondering whether regular inspection is really necessary . After all , if a branch falls off or a tree falls over , we ’ ll probably just clean it up and go about our routine with a half-day delay . Unfortunately , that would be the best-case scenario . What happens if a heavy tree part falls on the maintenance shed or pump house — or worse , on a spectator , student or athlete ? When a tree fails with the result of striking a target , the word “ negligence ” enters the picture . sportsfieldmanagementonline . com November 2024 | SportsField Management
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