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Northern Journal of Applied Forestry Online Quiz
Derived from the 2013 March Northern Journal of Applied Forestry
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The Northern Journal of Applied Forestry Quiz is approved for 2.5 continuing forestry education (CFE) credit hour in Category 1-CF by the Society of American Foresters. Successful completion of the self-assessment, defined as a cumulative score of at least 70%, is required to earn CFE credit. CFE approval is valid for one year from the issue date of publication, and participants may submit the quiz at any time during that period.

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1. As one measure of branch character, Hagemann et al., used the ASIX-Index, defined by Struck and Dohrenbusch (2000) as:
a) Number of live branches divided by length of stem section times 100.
b) Branch circumference divided by the tree diameter at breast height times 100.
c) Branch diameter divided by the tree diameter at breast height times 100.
2. Which of the following statements from Hagemann et al. is correct?
a) The number of branches in the lowest stem section was significantly positively correlated with tree height for all species.
b) Tree species was less important in determining tree quality than tree height.
c) Beech and maple saplings had similar number of live branches in the lowest stem section.
3. According to Hagemann et al., for which purpose can the modified quality index (mQI) be used by forest practitioners?
a) To focus silvicultural measures on saplings with a potential for producing high-quality timber
b) To estimate the financial revenue of planned harvesting measures based on timber quality
c) To identify trees that require pruning
4. In a study by Anderson and Bolstad, which of the following were not important variables in estimating forest biomass when all plots are combined?
a) Mean canopy height
b) Median intensity of canopy returns
c) Proportion of returns from 9/10ths of the maximum canopy height
5. According to Anderson and Bolstad, which of the following statements is true when considering the timing of LiDAR data collection?
a) Leaf-on data usually proved more accurate estimates than leaf-off data.
b) Leaf-on and leaf-off data provide similar biomass estimates.
c) Leaf-on data usually provide less accurate biomass estimates than leaf-off data.
6. According to the study by Oblinger et al., damage to red pine due to Diplodia pinea is
a) Limited to very young trees
b) Limited to very old trees
c) Damaging to both very young and very old trees
7. Which of these diseases was not discussed in Oblinger et al.?
a) Sirococcus conigenus
b) Diplodia scrobiculata
c) Sirococcuspinea
8. What silvicultural approach proposed by Oblinger et al. could potentially decrease availability of Diplodia pineainoculum in red pine stands?
a) Reduction in overstory density
b) Increase in understory density
c) Decreasing organic matter layer
9. In a study of sugar maple growth by Duchesne et al., at equivalent stem densities, American beech saplings initially had a basal area approximately how many times higher than sugar maple saplings?
a) 1.4
b) 2.9
c) 4.8
10. In the study by Duchesne et al., where were the effects of lime application found to be less important?
a) The upper soil layer.
b) The deeper soil layer
c) Effects were similar in both layers.