Research Briefs Test
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Question: 1. Trees in mulched planting areas had higher:
leaf gas exchange.
leaf chlorophyll.
mineral content.
All of the above.

Question: 2. Little-leaf Linden trees sustained the least Japanese beetle damage by:
injection applications of imidacloprid.
spray applications of imidacloprid.
soil applications of imidacloprid.
untreated trees.

Question: 3. Paclobutrazol treatment induced which adaptation to tolerate drought?
decreased total leaf content of carotenoids and xanthophylls.
weakened leaf membrane integrity.
increased leaf photosynthetic efficiency.
decreased light-induced CO2 fixation.

Question: 4. Stem injection of insecticide is effected by:
the distribution of water flux within the stems.
the variability of daily water use.
the amount and timing of water use.
All of the above.

Question: 5. Which soil decompaction and liquid amendment worked best?
injections only.
liquid amendment.
untreated control.
injections followed by liquid amendment.

Question: 6. Which option precisely locates defects and differentiates between decay and crack-induced acoustic shadows?
visual inspection.
single-path stress wave test.
Tomograph.
resistance microdrilling.

Question: 7. The serviceberry that was the tallest is:
Tradition.
Cole’s Select.
Spring Glory.
Robin Hill.

Question: 8. Which of these cultivars is appropriate for planting under overhead wires?
Cumulus.
Autumn Brilliance.
Princess Diana
All of the above.

Question: 9. The most effective pruning types for reducing trunk movement in wind, is:
thinned outer edge of the crown.
structurally pruned trees.
lion’s tailed trees.
there is no difference.

Question: 10. The most effective pruning types for reducing trunk movement from hurricane wind, is:
thinned.
non-pruned.
raised.
All of the above



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