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ISA Arborist Certification Chapter 3 Questions with complete solution 2023 $15.49   Add to cart

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ISA Arborist Certification Chapter 3 Questions with complete solution 2023

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ISA Arborist Certification Chapter 3 Questions with complete solution 2023

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  • September 29, 2023
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  • 2023/2024
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ISA Arborist Certification Chapter 3 - Soil
Science
organic layer - correct answer 0 Horizon, an unaltered soil, thin layer of decomposing
organic matter

Loam - correct answer 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

Topsoil - correct answer commonly known as the uppermost layers (O,A,E, and
sometimes the upperpart of B horizon)

C Horizon - correct answer Deepest Soil layer composed of partially weathered parent
material. Soil in this horizon is continually forming.

A Horizon - correct answer Contains most of the fine absorbing roots of trees and is
very biologically active. Rich in organic matter.

E Horizon - correct answer Between the A and B Horizon, lacks the organic matter as
in A, has lighter color due to this.

Absorbing Roots - correct answer Roots found in the upper 6-10 inches of soil

Roots - correct answer Few_____ grow deeper than 3 to 4 ft.

Soil Structure - correct answer Shape, size, strength, and arrangement of soil
aggregates form ____.

Micropores - correct answer Soil pores that retain water and are the source of
available water to plants between rainfalls.

Macropores - correct answer Soil pores too large to hold water against the force of
gravity and become filled with air as water drains from the soil.

Bulk Density - correct answer Mass of dried soil per unit of undisturbed soil volume.
Can be used to assess whether adequate pore space exists.

Sand - correct answer Soils with a high percentage of _________ are less prone to
compaction.

Clay - correct answer Soils with a high percentage of ______ are easily compacted.

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