The Download Test Bank For Soil Science and Management 6th Edition Edward Plaster 0840024320 9780840024329 Full Chapter New 2024
The Download Test Bank For Soil Science and Management 6th Edition Edward Plaster 0840024320 9780840024329 Full Chapter New 2024
The Download Test Bank For Soil Science and Management 6th Edition Edward Plaster 0840024320 9780840024329 Full Chapter New 2024
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TRUE/FALSE
1. Physical weathering is the disintegration of rock by only temperature, water, and wind.
ANS: F PTS: 1
ANS: T PTS: 1
3. Levees are formed along river banks where coarse materials are deposited.
ANS: T PTS: 1
ANS: F PTS: 1
ANS: T PTS: 1
6. Frost wedging occurs when water freezes and expands in rocks or in cracks in the rock, causing it
to break apart.
ANS: T PTS: 1
7. The A, E, B, and O horizons make up the solum, which contains the most plant roots.
ANS: T PTS: 1
MULTIPLE CHOICE
1. A pedon is a human device for studying soil. It is a section of soil 3 ft. 3 ft. ft.
a. 3
b. 4
c. 5
d. 6
ANS: C PTS: 1
2. A talus, sand and rocks that collect at the foot of a slope, is an example of colluvial material
but includes all of the following EXCEPT .
a. avalanches
b. mudslides
c. landslides
d. waterslides
ANS: D PTS: 1
3. Rock formed by pressure applied to lose materials is called _.
a. metamorphic
b. sedimentary
c. igneous
ANS: B PTS: 1
4. When a river cuts deeply into a floodplain to flow at a lower elevation, the old floodplain is called a
.
a. river bank
b. river terrace
c. river delta
d. river plain
ANS: B PTS: 1
6. All of the following are ways in which climate affects soil development EXCEPT .
a. physical weathering
b. chemical weathering
c. amount of and decay of organic matter
d. amount of sedimentary rock in parent material
ANS: D PTS: 1
YES/NO
1. Does topography change soil formation by changing water movement and soil temperature?
ANS: Y PTS: 1
2. Are loess soils made up of wind-deposited silt, and are they important agricultural soils in much
of Iowa, Illinois, and neighboring states?
ANS: Y PTS: 1
ANS: Y PTS: 1
ANS: N PTS: 1
ANS: N PTS: 1
COMPLETION
1. Pedology is the study of soil formation, classification, and mapping. Soil formation is also known
as soil .
ANS: genesis
PTS: 1
. ANS: sedimentary
PTS: 1
3. Deltas form when rivers flowing into an ocean and deposit sediments at the mouth of the river.
Delta soil has very particles and tends to be wet. The Mississippi River
Delta of Louisiana and the Rio Grande Valley of Texas and Mexico are examples.
ANS: small
PTS: 1
4. Soil genesis begins with rock breaking into smaller particles that provide the
materials.
ANS: parent
PTS: 1
ANS: Igneous
PTS: 1
6. Flood waters spreading over large, flat areas called can leave deposits of
fine particles.
ANS: floodplains
PTS: 1
7. Except for a surface layer of plant debris, mineral soils contain less than % organic matter.
ANS:
20
twenty
PTS: 1
8. Organisms that can impact soil are burrowing animals, earthworms, and nitrogen-fixing
.
ANS: bacteria
PTS: 1
. ANS: lime
PTS: 1
MATCHING
1. ANS: B PTS: 1
2. ANS: C PTS: 1
3. ANS: A PTS: 1
Match the following types of master horizons with the best description.
a. A d. E
b. B e. O
c. C f. R
4. Greatest eluvation; depleted in clay, chemicals, organic matter; light colored
5. Topsoil; organic matter accumulates; dark colored
6. Subsoil; “zone of accumulation” (illuviation)
7. Wholly or partially decayed plant and animal debris; undisturbed soil; example—forest
8. Underlying hard bedrock; may be cracked, fractured; intrudes into soil
9. “Parent” material of soil; little touched by soil-forming processes
4. ANS: D PTS: 1
5. ANS: A PTS: 1
6. ANS: B PTS: 1
7. ANS: E PTS: 1
8. ANS: F PTS: 1
9. ANS: C PTS: 1
ESSAY
ANS:
As soils age they may develop horizon positions and properties that are between master horizons.
Such transitional layers are identified by two master letters with the dominant one written first. An AB
layer lies between the A and B horizons but is most like the A horizon. Layers can be further
identified by a lowercase letter suffix denoting a trait of the layer (Ap). Numbers can be used to
indicate further subdivisions (Bt1).
PTS: 1
ANS:
Initially a thin layer of soil appears on the parent material. As soil ages, biological processes tend to
increase nitrogen content. The passage of time transforms soil so it is less and less like its parent material.
Mature soils are generally productive, but as time passes, weathering, erosion, leaching, and misuse can
make a soil less productive. An old soil can even become the parent material for a new soil.
PTS: 1
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