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WorksheetsSoil Profile, Texture, and Structure Review
Total questions: 25
Worksheet time: 13mins
What is the size of stilt?
smallest mineral particle
medium sized mineral particle
largest mineral particle
none
What does aggregates mean?
the ease with which air and water may pass through the soil
the arrangement of the soil particles into clusters
groups of soil particles that bind to each other more strongly than to adjacent particles.
while clumps of soil caused by tillage
How many basic soil texture classes are there?
5
11
10
12
When dry, this type of soil has clods and is very difficult to break with your fingers?
clay loam
sandy loam
clay
sandy clay loam
How many primary types of structures are there?
5
8
10
12
How is bulk density calculated?
Calculated by dividing the mass of the soils in a soil sample by the volume of solids in the soil sample
Calculated by dividing the mass of dry soil by the volume of the soil
What happens in the E horizon?
underlies bedrock, beneath C horizon
an organic layer made up of partially decayed plant and animal debris
underlies O or A horizon, parallel to the soil surface
How deep should a soil profile be studied?
2 feet
3-5 feet
6-8 feet
1.5 feet
Describe Soil profile?
a vertical cross section of the soil
materials may be altered in the soil
materials may be moved within the soil
which one of these does soil texture not affect
plant growth
water-holding capacity
water
soil workability
When this soil type contains moisture, it has a slight gritty feel but ribbons fairy well:
loamy sand
sand
silt loam
clay loam
Describe R horizon ?
substratum affects soil and changes overtime
underlies bedrock, beneath C horizon
undelies the O or A horizon
Peds: aggregates that occur naturally in the soil.
False
True
Soil Structure....
clumps of soil caused by tillage
the arrangement of the soil particles into clusters
aggregates that occur naturally in the soil
the ability of a soil to retain water for use by plants
Identify pore space?
a vertical cross section of the soil
parent material
decreases with higher soil density
native vegetation
Top soil and eluviation is part of what horizon?
O
E
R
A
Subsoil, illuviation, and solum is part of what horizon?
A
C
B
D
What is Translocation?
divide the mass of the soil in a soil sample
materials may be moved within the soil
materials may be altered in the soil
Transformation is?
a vertical cross section of the soil
material may be altered in the soil
slope
none of the above
What are not soil-forming factors?
Losses
slope
weathering
climate
What is the size of sand?
The smallest mineral particle
largest mineral particle
medium sized mineral particle
large- medium sized mineral particle
Clay is sized?
small
medium
large
extra large
What are not one the five textural classes?
medium textured
coarse textured
fine textured
large textured
What aren't primary types of structures?
granular
granite
single grain
massive
Permeability is...
the ease with which soil may be tilled and the timing of working the soil after a rain
the ease with which air and water may pass through the soil
water- holding capacity
the arrangement of the soil particles into clusters
