compacting it goes a long way.”
Air excavators can replace tools with sharp edges such as picks, digging blades, shovels, or backhoes that can damage the tree during excavation. Air excavation also makes it easier to break up compacted soil with less fatigue to workers than other hand tools. “Removing soil from roots and trunks using hand tools oen takes more time and may cause damage if it is not done carefully,” Houser says. IT’S ALL IN THE SOIL When it comes to air excavators, it’s im- portant to consider what types of soil you’ll be working with. Rocky soils, for example, make it difficult to excavate with a shovel, while compacted soil can be harder to get through. “There are four types of soil in North Texas, and the time required to re- move soil from roots or trunks can vary
An arborist uses Arborjet’s Supersonic Air Knife pneumatic soil excavator to delicately work around tree roots.
Arborilogical owner Steve Houser.
“The roots need air, and they can suffo- cate if there’s no pore space or it’s too difficult for water to remain in the soil,” says Kevin Brewer, the northeast ter- ritory technical manager for Arborjet, Inc. , which manufacturers air excava- tors and injectable tree solutions. “De-
The decompaction an air excavator pro- vides can be used to keep trees healthy or to intervene before trees become too sick or damaged.
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