G Gall – A localized swelling of branch or stem generally caused by fungi, bacteria, insects or a physiological disorder. Gas Exchange – Represents the amount of air exchanged within the soil volume. It is inhibited by high compaction and fine textured soils. Girdling Roots – Roots that grow around the trunk in a circular […]
F Fiber Buckling – Visible enlargement of tissue on the down side of a tree stem. Represents the reaction of a stem to a heavy loading. It is normally safe except when coupled with bark defoliation from the top (tensile) part of the loaded stem. Flush Cuts – Flush cuts are injurious because they remove […]
E Epicormic Shoot – Shoot that arises from latent or adventitious buds that occur on stems and branches and on suckers produced from the base of trees. Evapotranspiration (ET) – Water loss from the soil resulting from water uptake by roots and water evaporation from the soil. Standard ET data for different areas during each […]
D Diameter Breast Height (DBH) – Diameter at Breast Height (measured at 4 1/2 feet above soil grade). DBH is required for determining tree value. Multi stemmed trees require diameters for each stem. In addition, the stem diameter must be factored by the relative crown ratio of the stem. Decay – The process of degradation […]
C Caliper – Synonym for trunk diameter used to measure the size of nursery stock; by convention, measured 15 cm (6 in.) above the ground for stems less then or equal to 10 cm. (4 in.) and at 30 cm. (12 (in.) above ground for stems greater than 10 cm. (4 in.) Contrast with diameter […]
B Basal Flare – The rapid increase in diameter that occurs at the confluence of trunk and root crown, associated with both stem and root tissue. Best Management Practices – The best available treatments, considering the benefits and drawbacks, based on current knowledge. Bleeding – Flow of sap from wounds and/or other injuries. Bole – […]
A Abatement – Reduction in hazard, either by treatment of tree of removal of target. Adventitious Root – Root tissue that develops from newly organized meristems, sometimes associated with fill and/or stem decay. Adventitious Shoot – Vegetative tissue that develops from newly organized meristems rather than latent buds; frequently associated with pruning wounds. Allelopathy – […]
