FREE Certified Arborist Installation and Establishment Questions and Answers
What does integrated pest management aim to achieve?
Explanation:
Maintaining a manageable level of pest damage is the aim of integrated pest management. Originally, integrated pest control was developed as a substitute for using pesticides. It suggests using a comprehensive strategy for pest management, which might involve using fewer pesticides. Integrated pest control systems focus on minimizing collateral harm to non-target creatures, including people, while causing the least amount of disturbance to the preexisting habitat.
Which kind of nursery stock is less likely to have roots girdle when planted?
Explanation
The least likely trees to experience girdling roots after planting are bare-root trees. A tree that is transplanted bare-root means that its roots are not covered in soil or a container. Usually, the tree is quite young, with very thin roots. Girdling roots are rare as long as they are planted correctly and spread widely. Contrarily, a tree that has been balled and burlapped, containerized, or grown in a container would have more established roots in a confined space, increasing the possibility that the roots will recirculate and stifle neighboring trees.
Why is it not a good idea to use gravel to fill the bottom of the hole when planting a large tree?
Explanation:
It is not a good idea to use gravel to cover the bottom of the hole when planting a large tree because this can cause the soil to get excessively saturated. A perched water table is what this is called, and it may be quite harmful to trees. Water will pool in the upper soil around the roots and sit there indefinitely if the hole is partially filled with loose dirt and has gravel at the bottom. The roots may drown if this circumstance is allowed to continue.
Which kind of nursery stock has up to ninety percent of its roots cut for absorption before it is sold?
Explanation:
Nursery stock that is balled and burlapped has up to 90% of its absorbing roots removed before it is sold. When these trees are sold, the ground around them is dug up, and the little ball of roots that remains is covered in burlap. The tree will often be planted in biodegradable burlap, but the burlap's sides and top should be cut lower to allow the surface roots to spread out more readily.
What is the term for the temporary storage of carbon dioxide in the wood and other tissues of a tree?
Explanation:
Carbon sequestration is the process by which carbon dioxide is temporarily stored in a tree's wood and other tissues. Trees aid the ecosystem in several ways, one of which is the storage of excess carbon dioxide. The greenhouse effect is the result of solar heat being trapped in the atmosphere when carbon dioxide levels become too high. When a tree dies and breaks down, the carbon dioxide it has stored is released.
Which of the following describes a benefit of the trees that nurseries sell as bare roots?
Explanation:
The bare-root trees that nurseries sell are small, relatively cheap, and simple to transplant. The main reason these trees are so easy to transplant is because their roots are free of dirt, which makes them extremely light. Planting bare-root trees in the dormant season usually yields the best results. Throughout the transplantation procedure, the roots need to be maintained hydrated. You can plant some of the other transplant tree kinds at any time of year.
How do you begin training a young tree?
Explanation:
A young tree must initially be trained by eliminating any dead or broken branches. Subsequently, the arborist will choose one main branch, or several main branches if the tree's crown is quite wide. Generally speaking, the strongest and most erect branch on the tree should be the leader. Choosing a leader facilitates the arborist's ability to visualize the ideal tree structure, which will guide further decisions during the training phase. Any branches that are in direct competition with the chosen main branch should be eliminated or trimmed back to laterals.
For recently planted trees, what kind of fertilizer is recommended?
Explanation:
For certain recently planted plants, slow-release nitrogen fertilizer is recommended to promote root exploration and offer a consistent low-salt nutrition source for tree establishment. Most trees can usually flourish without additional fertilizer unless they are in soil that is deficient in a particular nutrient or if the nutrient is bound in a way that prevents the tree from using it.
What is the name of the process that quickly transitions bare-root nursery stock from dormancy to growth?
Explanation:
Bare-root nursery stock transitions quickly from dormancy to growth through sweating. Before being sold, bare-root nursery stock is frequently stored in a chilly environment. The tree is then put through a quick warming process that causes it to emerge from hibernation. The tree is now prepared to flourish in its new surroundings.
Which root part is growing in the most aggressive way?
Explanation:
The most aggressive growth is seen in the roots closest to the surface. This is partially because the lower roots are located in less oxygenated and poorly draining soil. Because of this, an arborist should always make the top of the receiving hole bigger when transplanting a tree. As a general guideline, the hole should be roughly twice or three times the width of the root ball at the top and roughly the width of the root ball at the bottom. It makes sense to enlarge the planting hole's top diameter if the soil is inadequately aerated even at the top. The tree mustn’t be planted too deeply, in any case. More specifically, the hole must never be deeper than the space between the trunk flare and the bottom of the root ball. Additionally, there must be a minimum of two main roots situated one to three inches beneath the soil's surface.
What is the term used to describe groups of different plants that require approximately the same amount of water?
Explanation:
Hydrozones are collections of various plants that have similar water requirements. Trees are frequently planted in Hydrozones by arborists to make irrigation simpler and less complicated. Additionally, if a site has different elevations, the arborist may plant trees that require more water at the higher elevations so that the plants downstream can only survive off of the drainage from the trees that are higher.