The TreeRadar Unit (TRU™), manufactured by Tree Radar, Inc., of Silver Spring, Maryland, is a novel application of ground-penetrating radar (GPR) that can be used to assess trees noninvasively. The TRU can be used to assess the trunks and roots [...]

The notion of “organic” with respect to plant culture dates back to 1940, when Lord Northbourne (Walter Ernest Christopher James), a visionary agriculturalist, coined the term “organic farming” in his book Look to the Land. His concept of organic farming [...]

Most arborists agree that it’s best to ease into equipment acquisition when starting up your company’s new PHC program. Here, a PHC technician makes an application using a calibrated soil-injection device. Photo courtesy of Rainbow Treecare. Over the course of [...]

The weight of the cherry blossoms caused a limb to break and fall into the Tidal Basin last spring. "This photo was to document the crowds walking under broken portions until we arrived. A proper work zone was immediately set [...]

Any time a living part of a tree is cut open through pruning, or broken open through storm damage, the remaining area will likely decay. This article presents a way to think of pruning as “where to put decay into [...]