ISA ARBORIST PRACTICE EXAMS SOLVED CORRECTLY TO SCORE
A+
1. The ideal soil ratio for solids to pore space is 50-50
2. What is the correct scientific name for the oak
tree genus? Quercus
3. Which of the following is not one of the five
major catergories of soil horizons?
N
4. Loam is least composed of what soil classification? Loam is composed of
all
soils evenly
5. What is the difference in magnitude of acidity between 1000
a PH level reading of 4 vs. a PH reading of 7?
6. What is not a detrimental impact on tree growth
from compaction? Increasing organic
mater- ial
7. Field capacity is achieved after the draining of which of Gravitational water
the following?
8. What best defines the permanent wilting point
soil moisture condition? Water is held by the
soil but unavailable to
plants such that they
9. What soil below most likely has the lowest
infiltration rate? can't recover
Compacted clay
10. What major soil horizon category is not included in the C
zone designated as topsoil?
11. What soil type is most easily compacted? Clay
12. What is not a tree characteristic which helps to prevent Increased leaf
surface area
1/
7
, ISA ARBORIST PRACTICE EXAMS SOLVED CORRECTLY TO SCORE
A+
the loss of water?
2/
7
A+
1. The ideal soil ratio for solids to pore space is 50-50
2. What is the correct scientific name for the oak
tree genus? Quercus
3. Which of the following is not one of the five
major catergories of soil horizons?
N
4. Loam is least composed of what soil classification? Loam is composed of
all
soils evenly
5. What is the difference in magnitude of acidity between 1000
a PH level reading of 4 vs. a PH reading of 7?
6. What is not a detrimental impact on tree growth
from compaction? Increasing organic
mater- ial
7. Field capacity is achieved after the draining of which of Gravitational water
the following?
8. What best defines the permanent wilting point
soil moisture condition? Water is held by the
soil but unavailable to
plants such that they
9. What soil below most likely has the lowest
infiltration rate? can't recover
Compacted clay
10. What major soil horizon category is not included in the C
zone designated as topsoil?
11. What soil type is most easily compacted? Clay
12. What is not a tree characteristic which helps to prevent Increased leaf
surface area
1/
7
, ISA ARBORIST PRACTICE EXAMS SOLVED CORRECTLY TO SCORE
A+
the loss of water?
2/
7
