ISA Arborist Certification Practice Exams Part 2 MOST
RECENT EXAM 2026 ACTUAL COMPLETE 100 QUESTIONS
AND VERIFIED SOLUTIONS | GET IT 100% ACCURATE!!
ALREADY GRADED A+ | GUARANTEED
What soil moisture condition occurs when both the micro and macropores
are filled with water?
(A) Pore capacity (B) Wilting point (C) Field capacity (D) Saturation
D
A soil structure has a layer of clay above a layer of sand. At what point will
water begin to enter the lower layer of sand?
(A) The water will flow immediately through the clay layer into the sand
layer
(B) After the clay layer is partially saturated
(C) After the clay layer is fully saturated
(D) The sand layer is impervious
C
,1/27/26, 4:10 PM ISA Arborist Certification Practice Exams Part 2
For an ideal soil ratio, what component takes up the least amount of space
within the overall makeup of the soil structure?
(A) Water
(B) Air
(C) Organic matter
(D) Mineral-rich soil
C
What soil horizon category is most likely to include a large amount of
organic material?
(A) A (B) E (C) B (D) C
A
What soil below most likely has the highest infiltration rate?
(A) Loose sand
(B) Compacted silt
(C) Loose silt
(D) Compacted clay
A
/ 2/35
,1/27/26, 4:10 PM ISA Arborist Certification Practice Exams Part 2
What substance may be added to soil to temporarily lower the PH?
(A) Lime
(B) Ash
(C) Sulfur
(D) Calcium
C
What is the correct scientific name for the sugar maple genus?
(A) Picea(B) Ulmus (C) Magnolia (D) Acer
D
What statement regarding the net charge of soils is true?
(A) Soils have a net negative charge
(B) Soils have a net positive charge
(C) Positive sites outnumber negative sites
(D) Soils have only entirely positive or negative sites
A
/ 3/35
, 1/27/26, 4:10 PM ISA Arborist Certification Practice Exams Part 2
What irrigation system type is best suited for use on deeper, more mature
root systems?
(A) Drip irrigation
(B) High-pressure injection
(C) Basin irrigation
(D) Soaker hose
B
What tree species is commonly identified as having leaves in an opposite
arrangement?
(A) Hawthorne (B) Ash(C) Sycamore (D) Oak
B
A soil with a high buffering capacity will have which of the following
characteristics?
(A) High percentage of pore space
(B) Easily compacted
(C) High retention of water
(D) Resistant to changes in PH levels
D
/ 4/35
RECENT EXAM 2026 ACTUAL COMPLETE 100 QUESTIONS
AND VERIFIED SOLUTIONS | GET IT 100% ACCURATE!!
ALREADY GRADED A+ | GUARANTEED
What soil moisture condition occurs when both the micro and macropores
are filled with water?
(A) Pore capacity (B) Wilting point (C) Field capacity (D) Saturation
D
A soil structure has a layer of clay above a layer of sand. At what point will
water begin to enter the lower layer of sand?
(A) The water will flow immediately through the clay layer into the sand
layer
(B) After the clay layer is partially saturated
(C) After the clay layer is fully saturated
(D) The sand layer is impervious
C
,1/27/26, 4:10 PM ISA Arborist Certification Practice Exams Part 2
For an ideal soil ratio, what component takes up the least amount of space
within the overall makeup of the soil structure?
(A) Water
(B) Air
(C) Organic matter
(D) Mineral-rich soil
C
What soil horizon category is most likely to include a large amount of
organic material?
(A) A (B) E (C) B (D) C
A
What soil below most likely has the highest infiltration rate?
(A) Loose sand
(B) Compacted silt
(C) Loose silt
(D) Compacted clay
A
/ 2/35
,1/27/26, 4:10 PM ISA Arborist Certification Practice Exams Part 2
What substance may be added to soil to temporarily lower the PH?
(A) Lime
(B) Ash
(C) Sulfur
(D) Calcium
C
What is the correct scientific name for the sugar maple genus?
(A) Picea(B) Ulmus (C) Magnolia (D) Acer
D
What statement regarding the net charge of soils is true?
(A) Soils have a net negative charge
(B) Soils have a net positive charge
(C) Positive sites outnumber negative sites
(D) Soils have only entirely positive or negative sites
A
/ 3/35
, 1/27/26, 4:10 PM ISA Arborist Certification Practice Exams Part 2
What irrigation system type is best suited for use on deeper, more mature
root systems?
(A) Drip irrigation
(B) High-pressure injection
(C) Basin irrigation
(D) Soaker hose
B
What tree species is commonly identified as having leaves in an opposite
arrangement?
(A) Hawthorne (B) Ash(C) Sycamore (D) Oak
B
A soil with a high buffering capacity will have which of the following
characteristics?
(A) High percentage of pore space
(B) Easily compacted
(C) High retention of water
(D) Resistant to changes in PH levels
D
/ 4/35
