CRZ for Trees Test

CRZ for Trees Test
Please fill out your email address in the first box and your name, ISA cert. no. in the second box. Answer the questions below and when you are finished, press submit.

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Name :

Question: 1. A tree\'s root system varies according to:
species.
soil.
moisture.
All of the above.

Question: 2. Which roots are not considered within the CRZ?
Roots that collect nutrients.
Roots that collect moisture.
Deep structural roots.
All of the above.

Question: 3. The health of the CRZ can be damaged by:
applying chemicals.
compacting surrounding soil.
cutting roots.
All of the above.

Question: 4. The CRZ is the same as:
the tree\'s drip line.
a circle concentric to the tree\'s trunk.
a radius equal in feet to one and one-half times the number of inches of the trunk diameter.
the CRZ formula.

Question: 5. The CRZ formula considers what?
dbh of the tree.
condition rating.
species.
All of the above.

Question: 6. The roots of a young tree, with a good species tolerance, in the best condition, should be protected:
0.5 feet times the dbh.
0.75 feet times the dbh.
1 foot times the dbh.
1.25 feet times the dbh.

Question: 7. A mature 60-year-old, 32” dbh live oak, with a Condition Rating of 4 has a CRZ of:
24 ft. radius.
12.5 ft. radius.
60 ft. radius.
125 ft. radius.

Question: 8. A 15-year-old, 10” dbh yellow poplar, with a Condition Rating of 2 has a CRZ of:
2.5 ft. radius.
10 ft. radius.
12.5 ft. radius.
none of the above.

Question: 9. Which condition rating is the worst:
1.
2.
4.
5.

Question: 10. A young tree, with a poor species tolerance, in condition 2, should be protected:
0.5 feet times the dbh.
0.75 feet times the dbh.
1 foot times the dbh.
1.25 feet times the dbh.

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