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ISA Arborist Certification Chapter 3 - Soil Science { UPDATED} /54 Questions And Answers (A+)
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ISA Arborist Certification Chapter 3 - Soil Science { UPDATED} /54 Questions And Answers (A+)
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ISA Arborist Certification Chapter 3 - Soil Science{2023-2024 UPDATED} /54 Questions And Answers
(A+)
√Answer organic layer - Quiz :0 Horizon, an unaltered soil, thin layer of
decomposing organic matter
√Answer :Loam - Quiz :A mix of three different particle sizes and is often
considered an ideal soil texture because of the favorable characteristics for
plant growth.
Not made up of equal mix of sand, silt, clay. Contains less clay
√Answer :Topsoil - Quiz :commonly known as the uppermost layers (O,A,E, and
sometimes the upperpart of B horizon)
√Answer :C Horizon - Quiz :Deepest Soil layer composed of partially weathered
parent material. Soil in this horizon is continually forming.
√Answer :A Horizon - Quiz :Contains most of the fine absorbing roots of trees
and is very biologically active. Rich in organic matter.
√Answer :E Horizon - Quiz :Between the A and B Horizon, lacks the organic
matter as in A, has lighter color due to this.
√Answer :Absorbing Roots - Quiz :Roots found in the upper 6-10 inches of soil
√Answer :Roots - Quiz :Few_____ grow deeper than 3 to 4 ft.
√Answer :Soil Structure - Quiz :Shape, size, strength, and arrangement of soil
aggregates form ____.
√Answer :Micropores - Quiz :Soil pores that retain water and are the source of
available water to plants between rainfalls.
√Answer :Macropores - Quiz :Soil pores too large to hold water against the
force of gravity and become filled with air as water drains from the soil.
√Answer :Bulk Density - Quiz :Mass of dried soil per unit of undisturbed soil
volume. Can be used to assess whether adequate pore space exists.
, √Answer :Sand - Quiz :Soils with a high percentage of _________ are less prone
to compaction.
√Answer :Clay - Quiz :Soils with a high percentage of ______ are easily
compacted.
√Answer :pH - Quiz :The measure of the acidity or alkalinity of soil.
√Answer :pH 7 - Quiz :pH neutrality
√Answer :pH 0-6.5 - Quiz :Acidic
√Answer :pH 7.5-14 - Quiz :Alkaline
√Answer :pH 6.0 to 6.5 - Quiz :Generally favorable pH for most trees
√Answer :Highly Alkaline soils - Quiz :iron, zinc, and manganese may be
unavailable. calcium, magnesium, and potassium may become more available.
√Answer :Highly acidic soils - Quiz :Phosphorus may be unavailable.
√Answer :Micronutrients - Quiz :iron, manganese, ...
√Answer :Temporaliy lower pH - Quiz :Add Sulphur
√Answer :Raise pH - Quiz :Add Lime
√Answer :Buffering Capacity - Quiz :resistance to change in pH, especially in
soils high in clay or organic matter.
√Answer :Essential elements - Quiz :Minerals required for tree growth, dissolve
in water then become available for absorption by tree roots
√Answer :ions - Quiz :Essential Elements/ Minerals in solution, are charged
particles called ____.
√Answer :anions - Quiz :Negatively charged ions.
√Answer :cations - Quiz :Positively charged ions.
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