13. TREES AND CONSTRUCTION WORKBOOK Flashcards
True/False—Evaluating suitability of individual trees or groups of trees for preservation is an important task for the arborist.
True
True/False—The goal of an arborist involved in a development project is to save every tree on the site.
False
True/False—The largest, most mature trees are not always the best candidates for preservation.
True
The __________ is the area around a tree where the minimum amount of roots that are biologically essential to the structural stability and health of the tree are located.
critical root zone
The __________ is an area defined during site development, where construction activities and access are limited to protect the tree(s) and soil from damage, and to sustain tree health and stability.
tree protection zone
True/False—Less injury is caused by tunneling directly under a tree than by cutting directly across the root system of a tree when excavating for utility lines.
True
True/False—Preferably, the critical root zone will be much larger than the tree protection zone.
False
True/False—The purpose of the barriers, limitations, and specified work zones should be clearly communicated to each person on the jobsite.
True
True/False—It is easier for an arborist to treat trees that have been damaged by construction than to prevent the damage.
False
Written __________ should detail exactly what can and cannot be done to and around the trees.
specifications
Use of an __________ has proven effective for soil aeration and radial trenching, causing much less root injury than mechanical excavation equipment.
air-excavation device
True/False—Small-diameter wells built around the trunks of trees are usually adequate to protect the tree and ensure survival.
False
True/False—If roots must be severed, they should be cut cleanly with sharp tools and prevented from drying out.
True
In __________, trenches are made in a radial pattern throughout the root zone and should extend at least as far as the drip line.
radial trenching
Measures to reduce compaction on building sites are not always an option, because
c. projects must comply with specific engineering standards regarding soil compaction
A measure that can be taken to minimize compaction on a construction site is
c. spreading a temporary, thick layer of mulch over the site
A common strategy for tree preservation that can retain more trees and promote sustainability is
a. retaining groups of trees with a shared root space and a protected perimeter
What flexible guideline for a multiple of tree diameter is commonly used when determining where to establish a tree protection zone?
6 to 18 times greater than the trunk diameter.
The study of the properties, distribution and effects of water on the earth’s surface, underground and in the atmosphere.
Hydrology
Most construction injury occurs to the ______ ________
Root System
The amount of damage a tree suffers from root loss depends, in part, on how close to the _____ _____ the cuts are made.
Trunk Flare
Severing one major root can cause the loss of ___% to___% of the root system.
15 to 25
Tree protection plans must include details on required ______ & _______ of soils.
Fencing & Protection
True/False- The root systems can extend much farther out than the DRIP LINE of the crown and much father out than the Critical Root Zone.
True
