ISA Arborist Exam Newest Exam / ISA Arborist Exam Preparation
ISA ARBORIST EXAM NEWEST EXAM / ISA ARBORIST EXAM
PREPARATION/ISA ARBORIST EXAM PRACTICE EXAM WITH COMPLETE
QUESTIONS AND CORRECT ANSWERS| BRAND NEW VERSION!
What macronutrient most often has the largest requirement for the health of
trees?
(A) Iron
(B) Sulfur
(C) Potassium (D) Nitrogen - Correct Answer-The answer is (D)
Of the elements necessary for survival, the one most critical and needed in the
largest quantity is nitrogen.
What essential element is more readily available in an acidic environment than
alkaline?
(A) Iron
(B) Calcium (C) Sulfur
(D) Potassium - Correct Answer-The answer is (A)
The PH of a soil condition has an impact on how prevalent a nutrient will be.
Some are more available in a low acidic PH and others in a high alkaline
environment. Of the options listed, Iron is more available in an acidic PH.
Nitrogen is present in soil mostly due to which of the following?
(A) Water
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, ISA Arborist Exam Newest Exam / ISA Arborist Exam Preparation
(B) Organic matter (C) Clay
(D) Sand - Correct Answer-The answer is (B)
Nitrogen comes from the amount of organic matter in the soil.
A 25-lb bag of fertilizer has a 10-6-4 analysis. How many pounds of potassium is in
the bag?
(A) 1 (B) 2.5 (C) 4 (D) 8 - Correct Answer-The answer is (A)
The analysis of a fertilizer provides three numbers which indicate the
percentages in pounds of each element. The numbers represent nitrogen-
phosphorous-potassium. Therefore, in this example, we have 4% potassium of a
25 lb. bag:
P = 0.04 x 25 = 1.0 lb.
Required fertilizer distribution rates for quick release are ______________ than
for that of slow-release.
(A) Greater
(B) Less
(C) Equal
(D) No relationship - Correct Answer-The answer is (B)
In general, there is a greater amount of fertilizer necessary per area for slow-
release fertilizer than the quick kind. Slow-release should be provided at a rate
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, ISA Arborist Exam Newest Exam / ISA Arborist Exam Preparation
of about 2-4 lbs. of nitrogen per 1000 square feet whereas quick release should
be 1-3 lbs. of nitrogen per 1000 square feet.
What project constraint listed below has a detrimental effect on the surface
application of fertilizer?
(A) Constrained time
(B) Inexperienced workers (C) Surface runoff
(D) Shallow root structure - Correct Answer-The answer is (C)
Surface applications of fertilizer are the easiest and quickest to complete. The
fertilizer will not penetrate deep and can be spread quickly. One of the
disadvantages is that there is a chance for it to be washed away in areas of
significant runoff.
What element can be classified as a micronutrient?
(A) Magnesium (B) Calcium
(C) Iron
(D) Sulfur - Correct Answer-The answer is (C)
Elements associated with tree growth are classified as macro and
micronutrients. Macronutrients are those most likely to be deficient in trees and
to have detrimental effects. These include nitrogen, phosphorous, potassium,
and sulfur. Micronutrients are less likely to be deficient but may cause problems
if there is a short supply. Iron is classified as a micronutrient.
3|Page
, ISA Arborist Exam Newest Exam / ISA Arborist Exam Preparation
What method of fertilizer application may result in the development of thick
patches of grass in spots surrounding the tree?
(A) Liquid injection
(B) Surface application (C) Foliar application (D) Implants - Correct Answer-The
answer is (A)
The increase in grass growth is due to the isolated areas drawing on the
localized fertilizer. Liquid injection, as well as the drill hole method, provides
fertilizer in isolated spots around the tree and spotty thick grass is a known side
effect.
The ideal soil ratio for solids to pore space is:
(A) 20:80
(B) 35:65
(C) 40:60
(D) 50:50 - Correct Answer-The answer is (D)
An even split between the amount of solids and the amount of pore space is the
ideal condition. This allows the pore space to contain sufficient amounts of
water and air while maintaining the soil integrity. The solids ideally are 45%
mineral and 5% organic matter.
What is the correct scientific name for the oak tree genus?
(A) Quercus (B) Pyrus (C) Larix (D) Acer - Correct Answer-The answer is (A)
4|Page
ISA ARBORIST EXAM NEWEST EXAM / ISA ARBORIST EXAM
PREPARATION/ISA ARBORIST EXAM PRACTICE EXAM WITH COMPLETE
QUESTIONS AND CORRECT ANSWERS| BRAND NEW VERSION!
What macronutrient most often has the largest requirement for the health of
trees?
(A) Iron
(B) Sulfur
(C) Potassium (D) Nitrogen - Correct Answer-The answer is (D)
Of the elements necessary for survival, the one most critical and needed in the
largest quantity is nitrogen.
What essential element is more readily available in an acidic environment than
alkaline?
(A) Iron
(B) Calcium (C) Sulfur
(D) Potassium - Correct Answer-The answer is (A)
The PH of a soil condition has an impact on how prevalent a nutrient will be.
Some are more available in a low acidic PH and others in a high alkaline
environment. Of the options listed, Iron is more available in an acidic PH.
Nitrogen is present in soil mostly due to which of the following?
(A) Water
1|Page
, ISA Arborist Exam Newest Exam / ISA Arborist Exam Preparation
(B) Organic matter (C) Clay
(D) Sand - Correct Answer-The answer is (B)
Nitrogen comes from the amount of organic matter in the soil.
A 25-lb bag of fertilizer has a 10-6-4 analysis. How many pounds of potassium is in
the bag?
(A) 1 (B) 2.5 (C) 4 (D) 8 - Correct Answer-The answer is (A)
The analysis of a fertilizer provides three numbers which indicate the
percentages in pounds of each element. The numbers represent nitrogen-
phosphorous-potassium. Therefore, in this example, we have 4% potassium of a
25 lb. bag:
P = 0.04 x 25 = 1.0 lb.
Required fertilizer distribution rates for quick release are ______________ than
for that of slow-release.
(A) Greater
(B) Less
(C) Equal
(D) No relationship - Correct Answer-The answer is (B)
In general, there is a greater amount of fertilizer necessary per area for slow-
release fertilizer than the quick kind. Slow-release should be provided at a rate
2|Page
, ISA Arborist Exam Newest Exam / ISA Arborist Exam Preparation
of about 2-4 lbs. of nitrogen per 1000 square feet whereas quick release should
be 1-3 lbs. of nitrogen per 1000 square feet.
What project constraint listed below has a detrimental effect on the surface
application of fertilizer?
(A) Constrained time
(B) Inexperienced workers (C) Surface runoff
(D) Shallow root structure - Correct Answer-The answer is (C)
Surface applications of fertilizer are the easiest and quickest to complete. The
fertilizer will not penetrate deep and can be spread quickly. One of the
disadvantages is that there is a chance for it to be washed away in areas of
significant runoff.
What element can be classified as a micronutrient?
(A) Magnesium (B) Calcium
(C) Iron
(D) Sulfur - Correct Answer-The answer is (C)
Elements associated with tree growth are classified as macro and
micronutrients. Macronutrients are those most likely to be deficient in trees and
to have detrimental effects. These include nitrogen, phosphorous, potassium,
and sulfur. Micronutrients are less likely to be deficient but may cause problems
if there is a short supply. Iron is classified as a micronutrient.
3|Page
, ISA Arborist Exam Newest Exam / ISA Arborist Exam Preparation
What method of fertilizer application may result in the development of thick
patches of grass in spots surrounding the tree?
(A) Liquid injection
(B) Surface application (C) Foliar application (D) Implants - Correct Answer-The
answer is (A)
The increase in grass growth is due to the isolated areas drawing on the
localized fertilizer. Liquid injection, as well as the drill hole method, provides
fertilizer in isolated spots around the tree and spotty thick grass is a known side
effect.
The ideal soil ratio for solids to pore space is:
(A) 20:80
(B) 35:65
(C) 40:60
(D) 50:50 - Correct Answer-The answer is (D)
An even split between the amount of solids and the amount of pore space is the
ideal condition. This allows the pore space to contain sufficient amounts of
water and air while maintaining the soil integrity. The solids ideally are 45%
mineral and 5% organic matter.
What is the correct scientific name for the oak tree genus?
(A) Quercus (B) Pyrus (C) Larix (D) Acer - Correct Answer-The answer is (A)
4|Page
