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SOIL 2124 Exam 2 Questions and Correct
Answers/ Latest Update / Already Graded
Why is it important to know soil physical properties?
Ans: 1. Basic properties are used in profile descriptions/ soil
classifications.
2. Aids in land use decisions.
3. Provides a rough index of soil chemical/nutritional/biological
properties
What are the 2 types of soil physical properties?
Ans: Static and Dynamic
Soil properties that do not change on short time scales under natural
conditions or without significant applied force
Ans: Static soil physical properties
Ex: soil texture
Soil properties that readily change on short time scales under natural
conditions or with relatively minor amounts of force
Ans: Dynamic soil physical properties
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Soil Structure, Soil Color
What are the key soil physical properties used in a profile description?
Ans: 1. Soil Color
2. Soil Texture
3. Soil Structure
4. Soil Consistence
5. Soil Density
The most obvious and easily determined soil characteristic
Ans: Soil Color
What can we tell about the soil from observing the color
Ans: organic matter content-
(darkness of soil)
soil color and temperature-
(dark absorb more heat, usually warm up quicker and have
higher temps)
Soil color and parent material -
(generally, dark parent material will develop into dark soils)
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Soil coloring agent that darkens the soil , is typically associated with
surface layers, and masks all other coloring agents
Ans: Organic Matter
Primary coloring agent in the subsoil, responsible for red, orange,
yellowish colors (rust colors)
Ans: Iron Oxides
coloring agent responsible for black concretions in soil
Ans: Manganese Oxides
coloring agent responsible for white colors in soil
Ans: Calcium Carbonates and Salts
Red colored soil coatings
Ans: Hematite
Yellow colored soil coatings
Ans: Goethite
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Gray colored soil coatings
Ans: No coatings
Soil is very important in determining...
Ans: soil drainage classification and depth to the water table,
also predicting land use hazards related to very shallow water
tables or temporary flooding
Refers to the length and duration of saturation and is not a measure of
how fast water drains from the soil
Ans: Soil Drainage
no gray colors within the top 48 inches of soil
Ans: Well-drained
gray colors btwn 24 to 48 inches from the surface
Ans: Moderately well-drained
gray colors between 12 to 24 inches from surface
All rights reserved © 2025/ 2026 |
SOIL 2124 Exam 2 Questions and Correct
Answers/ Latest Update / Already Graded
Why is it important to know soil physical properties?
Ans: 1. Basic properties are used in profile descriptions/ soil
classifications.
2. Aids in land use decisions.
3. Provides a rough index of soil chemical/nutritional/biological
properties
What are the 2 types of soil physical properties?
Ans: Static and Dynamic
Soil properties that do not change on short time scales under natural
conditions or without significant applied force
Ans: Static soil physical properties
Ex: soil texture
Soil properties that readily change on short time scales under natural
conditions or with relatively minor amounts of force
Ans: Dynamic soil physical properties
All rights reserved © 2025/ 2026 |
, Page |2
Soil Structure, Soil Color
What are the key soil physical properties used in a profile description?
Ans: 1. Soil Color
2. Soil Texture
3. Soil Structure
4. Soil Consistence
5. Soil Density
The most obvious and easily determined soil characteristic
Ans: Soil Color
What can we tell about the soil from observing the color
Ans: organic matter content-
(darkness of soil)
soil color and temperature-
(dark absorb more heat, usually warm up quicker and have
higher temps)
Soil color and parent material -
(generally, dark parent material will develop into dark soils)
All rights reserved © 2025/ 2026 |
, Page |3
Soil coloring agent that darkens the soil , is typically associated with
surface layers, and masks all other coloring agents
Ans: Organic Matter
Primary coloring agent in the subsoil, responsible for red, orange,
yellowish colors (rust colors)
Ans: Iron Oxides
coloring agent responsible for black concretions in soil
Ans: Manganese Oxides
coloring agent responsible for white colors in soil
Ans: Calcium Carbonates and Salts
Red colored soil coatings
Ans: Hematite
Yellow colored soil coatings
Ans: Goethite
All rights reserved © 2025/ 2026 |
, Page |4
Gray colored soil coatings
Ans: No coatings
Soil is very important in determining...
Ans: soil drainage classification and depth to the water table,
also predicting land use hazards related to very shallow water
tables or temporary flooding
Refers to the length and duration of saturation and is not a measure of
how fast water drains from the soil
Ans: Soil Drainage
no gray colors within the top 48 inches of soil
Ans: Well-drained
gray colors btwn 24 to 48 inches from the surface
Ans: Moderately well-drained
gray colors between 12 to 24 inches from surface
All rights reserved © 2025/ 2026 |
