Installation and Establishment Flashcards
6 cards from real Certified Arborist Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Installation and Establishment flashcards as text
What is 'transplant shock' and how long can it last?
Answer: Stress from root loss during transplanting; can last 1-3 years
Transplant shock results from significant root loss during the digging and moving process. Trees may show reduced growth, leaf scorch, or dieback for 1-3 years until the root system regenerates.
Which soil amendment is most universally recommended when backfilling a tree planting hole?
Answer: The original native soil without amendments
Current best practice recommends backfilling with the original native soil. Amendments can create a 'container effect' where roots circle within the amended zone rather than growing into surrounding soil.
What is the recommended ratio of root ball diameter to planting hole width?
Answer: 2-3 times wider
The planting hole should be 2-3 times wider than the root ball but no deeper. This wide, shallow hole loosens soil for lateral root growth, which is how most tree roots naturally spread.
A newly planted tree shows leaf scorch on the south-facing side. What is the most likely cause?
Answer: Sunscald from sudden exposure to direct sun
Trees grown in shaded nursery conditions can develop leaf scorch when suddenly exposed to full sun. The south-facing exposure receives the most intense sunlight.
When is the best time to plant most deciduous trees in temperate climates?
Answer: Fall after leaf drop or early spring before bud break
Fall and early spring are ideal because trees can establish roots while not expending energy on leaf production. Cool temperatures reduce water stress during the establishment period.
What is 'girdling root' and why is it a problem for newly planted trees?
Answer: A root that encircles the trunk, eventually restricting water and nutrient flow
Girdling roots wrap around the trunk base, gradually constricting the flow of water and nutrients as both the root and trunk grow in diameter. This can eventually kill the tree.