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Arboriculture & Urban Forestry

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online quiz tutorial.

Arboriculture & Urban Forestry quizzes less than one-year old are available online for free to members only. Online quizzes over one-year old may be purchased by members for $9.95 and by non-members for $12.95. If you are certified and successfully pass the quiz with a score of 80% or higher, CEUs will be posted to your account within 48 hours.

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A more in-depth explanation about AUF quizzes is included in the product pages.

TitleCEUsPrice
AUF March 2017

How far a limb flexes with or without leaves can be of great concern when those limbs overhang powerlines. Does an early snow or ice storm pose a more serious threat if it hits before a tree drops its leaves and enters its dormant stage? Gregory Dahle, Aaron Carpenter, David DeVallance, and Mo Zhou investigate.(A,U,Bs)

1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars
January 2017 issue of AUF

Tree fertilization is a common practice in arboriculture, and while reports have shown that nitrogen can increase fine root growth in localized areas, the effect on a tree’s entire root system has not been thoroughly investigated. Gary Watson and Angela Hewitt take a look at how effective fertilizer can be as a root stimulant (A,M,Bs)

1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars
November 2016 issue of AUF

Degraded, highly compacted soils along roadsides present an inhospitable environment for trees and shrubs and lead to the failure of urban landscapes. Andy Bary, Rita L. Hummel, and Craig Cogger report on a study using organic amendments that usually end up in compost piles or landfills, including include yard waste, biosolids, and worm castings. (A, M,Bs)

1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars
AUF 2016 Quiz

Studies have looked at the mitigating effects of individual trees on stormwater runoff, but never on a full municipal scale including trees, ground cover, and other vegetation, and over different seasons. Geoffrey Donovan, David Butry, and Megan Mao tackle the problem by analyzing data collected from both summer and winter storms in Portland, Oregon, U.S. (A,U,T,M,L,Bs)   

1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars
July 2016 AUF quiz

Oriental bittersweet, an invasive woody vine has been an arboricultural problem ever since they were introduced in North America in the late 1800s. Now a new study by Christopher Nowak is showing hope that removing the vines may not require chemical herbicide along with pruning.  (A,U,T,M,L,Bm)

1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars
2016 May issue of AUF

Predicting growth rates of trees under or near overhead utility lines is key to optimizing pruning cycles. Matt Follett, Charles Nock, Christian Buteau, and Christian Messier examine an innovative approach using handheld laser rangefinders to safely and accurately estimate growth rates from the ground.(A,U,T,M,L,Bp)

1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars
March AUF

High mortality rates for bare root stock transplants can often be traced to unsuitable soil conditions in the urban environment. Emma Schaffert and Glynn Percival examine the use of three types of soil amendments applied both singularly and in combination, and their promising results.(A,Bs)

1 CEU
ISA Members: $0.00
Retail Price: $12.95
All prices in US Dollars
2016 January issue of AUF

Learn about a new tree valuation model, called the Linear Index of Tree Appraisal (LITA) model. The model uses tree cross-sectional area to extrapolate from a band of known prices to a base price for any desired tree size, which can then be adjusted using an appropriate factor depending on tree vitality/damage.
  (1 CEU A,M,Bm)

1 CEU
ISA Members: $9.95
Retail Price: $12.95
All prices in US Dollars
2015 November issue of AUF

What are the costs of maintaining trees and the urban forest? And, what are the costs of not maintaining trees? The ISA Science and Research Committee present a detailed summary of the literature on the costs of maintenance and lack of maintenance for types of tree care commonly included in municipal budgets (1 CEU A,M,Bm)

1 CEU
ISA Members: $9.95
Retail Price: $12.95
All prices in US Dollars
September issue of AUF

An industry standard tool for appraising large trees, the CTLA Trunk Formula Method is put to the test to determine just how accurate it can be in the field. Some surprising results help pin point key errors common to even experience appraisers. (by James Komen and Donald R. Hodel) (A, M, Bp)

1 CEU
ISA Members: $9.95
Retail Price: $12.95
All prices in US Dollars
July 2015 issue of AUF

Expanding urbanization, characterized by increased impervious surfaces and decreased tree canopy, is contributing to rising urban temperatures. Urban trees may help mitigate this, this study looks at how tree form and placement can improve on current shade tree planting guidelines. (A, M, Bs)

1 CEU
ISA Members: $9.95
Retail Price: $12.95
All prices in US Dollars
2015 May issue of AUF

Author Rebecca Dolan examines over 200 years of data, focusing on a mid western U.S. forested region, documenting the changes to the native beech-maple forest as the area went from heavily forested to major metropolis, and examining what the future implications to contemporary urban forest planning may be. (A, M, Bm)

1 CEU
ISA Members: $9.95
Retail Price: $12.95
All prices in US Dollars
123

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