WorksheetsSoils Review
Total questions: 34
Worksheet time: 27mins
Which horizon is outlined in red?
O
A
B
C
Which soil horizon is outlined in the blue?
O
A
B
C
Which soil horizon is outlined in the green?
O
A
B
C
What is the structure type in the second horizon or the blue outline?
Granular
Platey
Blocky
Prismatic
Structureless
Which answer best fits the description for sand
Mostly gritty, large pores, high permeability, low water holding capacity.
Mostly gritty small pores, high permeability, low water holding capacity
Mostly gritty large pores, low permeability, low water holding capacity
Mostly gritty large pores, high permeability, high water holding capacity
Which answer best fits the description for silt (in comparison to clay and sand)?
Smooth with large pores, lower permeability, low water holding capacity.
Smooth with medium sized pores, lower permeability, low water holding capacity.
Smooth with medium sized pores, lower permeability, high water holding capacity
Smooth with medium sized pores, higher permeability, low water holding capacity.
What is the best fitting description for clay (in comparison to sand and silt)
Sticky with no predominate grit or smoothness, small pores, high permeability, low water holding capacity.
Sticky with no predominate grit or smoothness, small pores, low permeability, medium to high water holding capacity.
Sticky with no predominate grit or smoothness, medium pores, high permeability, medium to high water holding capacity.
Sticky with no predominate grit or smoothness, medium pores, medium to high permeability, low water holding capacity.
You can differentiate horizons by the following (there may be more that one check box):
Color
Texture
Structure
None of these
What causes soils to be black or dark brown (could be more than one check box)
High organic material content
Good water to air ratio
More moisture potentially
Iron Oxides
All of the above
Why are soils usually gray or white (more than one check box)
High OM
High moisture in the soil
Poor drainage
Leaching
None of the above
Explain what mottling is
Splotches of reddish brown in a gray profile or vise versa
Redox features
Caused by water or chemical changes
All of the above
This soil profile would be considered high in what?
Dirt (this is never the answer)
Course fragments
Organic Matter
Moisture
What is the top horizon called in this forest soil pit?
O
A
B
E
When texturing the longer the ribbon the higher the amount of this texture
Sand
Silt
Clay
The difference in silt loam, silty clay loam, and silty clay is..
The feel for grittiness
The length of the ribbon (or amount of clay)
What causes soils to be red or reddish brown
Organic Matter (OM)
Iron oxides and good aeration
Deserts
Moisture
What would be the structure grade for a soil profile that crumbles under any pressure and does not maintain a a shape but can still form peds?
Strong
Moderate
Weak
Structureless
What would be the structure grade for single grain (pure sand) or pure rock?
Strong
Moderate
Weak
Structureless
What structure type looks like granola or grape nuts?
Granular
Platy
Blocky
Pristmatic
Explain what a special feature is
A horizon with unique properties
A feature that has a large impact on the behavior of the whole profile
Something that can create hard pans in the horizons
All of the above
Explain what effective depth is:
The length of the whole soil profile
Texturing
How deep roots can grow
Differences in horizons
When filling out the back of the soils card you have to use the interpretation guide to find your answers for properties of the soil and soil management?
True
False
When determining AWHC (available water holding capacity) you calculate the total rate by multiplying what? (check all that apply)
The depth of the horizon (indicated on the pit car and you also write the depths on your horizons on the front of the card)
The texture holding percentage (as indicated on the interpretation guide)
Times it all by 4
The structure type
What kinds of soils would have a high AWHC: A low
Silt: Silt
Silt loams: Sandy
Sandy Clay: Silty Clay
Sandy:Silty
Permeability describes the rate of water movement through the soil.
True
False
When determining the correct answer while using the interpretation guide for the back of the card, you start with the most correct answer for the first column, then move down, if the answer is incorrect you move to the next answer to the right.
True
False
When determining internal soil drainage there isn't a soil interpretation chart; however, you know that excessively drained soils are __________textures typically and poorly drained soils are typically ________ textures?
silty, silty
sandy, clayey
clayey, sandy
silty, sandy
In order to classify a pit site as a floodplain what must near by?
River
Stream
Creek
All of the above
A footslope is at the bottom of a hill or mountain and the parent material that correlates with this site position is:
Residuum
Colluvium
Recent Alluvium
Old Alluvium
If my elevation was 4120 at point A and 4112 at point B and they were 100 feet apart, what would the slope be?
4
8
10
12
When determining the most intensive crop that should be grown it is important to know if outlets are available (if irrigation is available)
False
True
If soil has a pH between 6.3 and 8.3 then you don't have to do any kind of reaction correction.
False
True
How confident are you feeling for completing the soils event?
Awesome! I've got this
Pretty Good
Meh...
Terrible, please help me
Is there anything you feel like you need more help on?
