SSC 200 EXAM 2 QUESTIONS & ANSWERS
Brown and red colors in subsurface horizons are caused by ___ in the soil - Answer -
Iron oxides
Dull gray colors are characterized by - Answer -Low chromas
Soil colors are scientifically described by ___ color designations such as 10YR3/4 -
Answer -Munsell
What color would be typical of a well drained, low-organic matter sandy surface soil? -
Answer -10YR5/8
Texture describes the ___ pf particle soils - Answer -Sizes
Colloidal properties are exhibited by the ____ fraction of soils - Answer -Clay
The percentages of which soil components represent the minimum information
necessary in order to determine the textural class of a soil? - Answer -Silt and sand
Because of their greater surface area per unit of soil mass, silt loams soils generally
have a greater capacity than loamy soils to - Answer -absorb water, absorb gases,
release nutrients by mineral weathering, and support bacterial growth
Which of the following is NOT a textural class name? - Answer -Sandy silt
A sticky, putty-like feel indicates a high percentage of which soil separate? - Answer -
Clay
Which type of soil structure is typically found in surface soil (A Horizons)? - Answer -
Granular
Which type of structure is typically found in sodium-rich sub-surface horizons? - Answer
-Columnar
For which substance would the particle density equal the bulk density? - Answer -A
quartz pebble
IF a dry soil high in certain types of ____ is moistened, it is likely to swell up with
enough force to crack pavements and building foundations - Answer -Clay
Using a textural triangle chart, it can be determined that a soil with a 45% sand and
20% clay belongs to the ____ textural class - Answer -Loam
, A landscaping contractor wants to change the texture of a silt loam to meet the
specifications for a loam. They would most likely do so by adding ___ to the soil and
mixing it well. - Answer -Sand
In many soil profiles, the subsoil is high in clay, but is also quite permeable to
percolating water. Why? - Answer -Prismatic structure may be well developed
A soil with a bulk density equal to 0.35 Mg/m^3 is most likely what type of soil? -
Answer -A peat soil
Practices that add organic matter and reduce tillage can be expected to most
significantly increase the ___ in a soil - Answer -Macrophores
Fungal hyphae have been an important influence on soil structure because they -
Answer -Stabilize macro aggregates
Which of the following practices is (are) useful in stabilizing surface soil structure? -
Answer -use of organic mulch, use of green manure crops, growing grass sod, and
minimizing tillage
Soil tilt refers to - Answer -The physical suitability of a soil for plant growth
The difference between the liquid and plastic limits of a soil is - Answer -The plasticity
index
Light-colored surface soils are likely to be warmer than dark colored surface soils if the
soil moisture and other conditions are the same - Answer -False
Fungal hyphae play an important role in stabilizing surface soil aggregates - Answer -
True
Flocculation is the process by which certain chemicals in the soil stabilize large soil
aggregates - Answer -False
The drainage class of a soil can be judges by the presence and location of glee in the
soil profile - Answer -True
Tillage when the soil is too wet is likely to increase the soul bulk density - Answer -True
Roots of most plants have difficulty growing through soil if the bulk density is greater
than 1Mg/m^3 - Answer -False
The percent of total pore space in a soil can be calculated if only the particle density
and the organic matter content are known - Answer -False
Brown and red colors in subsurface horizons are caused by ___ in the soil - Answer -
Iron oxides
Dull gray colors are characterized by - Answer -Low chromas
Soil colors are scientifically described by ___ color designations such as 10YR3/4 -
Answer -Munsell
What color would be typical of a well drained, low-organic matter sandy surface soil? -
Answer -10YR5/8
Texture describes the ___ pf particle soils - Answer -Sizes
Colloidal properties are exhibited by the ____ fraction of soils - Answer -Clay
The percentages of which soil components represent the minimum information
necessary in order to determine the textural class of a soil? - Answer -Silt and sand
Because of their greater surface area per unit of soil mass, silt loams soils generally
have a greater capacity than loamy soils to - Answer -absorb water, absorb gases,
release nutrients by mineral weathering, and support bacterial growth
Which of the following is NOT a textural class name? - Answer -Sandy silt
A sticky, putty-like feel indicates a high percentage of which soil separate? - Answer -
Clay
Which type of soil structure is typically found in surface soil (A Horizons)? - Answer -
Granular
Which type of structure is typically found in sodium-rich sub-surface horizons? - Answer
-Columnar
For which substance would the particle density equal the bulk density? - Answer -A
quartz pebble
IF a dry soil high in certain types of ____ is moistened, it is likely to swell up with
enough force to crack pavements and building foundations - Answer -Clay
Using a textural triangle chart, it can be determined that a soil with a 45% sand and
20% clay belongs to the ____ textural class - Answer -Loam
, A landscaping contractor wants to change the texture of a silt loam to meet the
specifications for a loam. They would most likely do so by adding ___ to the soil and
mixing it well. - Answer -Sand
In many soil profiles, the subsoil is high in clay, but is also quite permeable to
percolating water. Why? - Answer -Prismatic structure may be well developed
A soil with a bulk density equal to 0.35 Mg/m^3 is most likely what type of soil? -
Answer -A peat soil
Practices that add organic matter and reduce tillage can be expected to most
significantly increase the ___ in a soil - Answer -Macrophores
Fungal hyphae have been an important influence on soil structure because they -
Answer -Stabilize macro aggregates
Which of the following practices is (are) useful in stabilizing surface soil structure? -
Answer -use of organic mulch, use of green manure crops, growing grass sod, and
minimizing tillage
Soil tilt refers to - Answer -The physical suitability of a soil for plant growth
The difference between the liquid and plastic limits of a soil is - Answer -The plasticity
index
Light-colored surface soils are likely to be warmer than dark colored surface soils if the
soil moisture and other conditions are the same - Answer -False
Fungal hyphae play an important role in stabilizing surface soil aggregates - Answer -
True
Flocculation is the process by which certain chemicals in the soil stabilize large soil
aggregates - Answer -False
The drainage class of a soil can be judges by the presence and location of glee in the
soil profile - Answer -True
Tillage when the soil is too wet is likely to increase the soul bulk density - Answer -True
Roots of most plants have difficulty growing through soil if the bulk density is greater
than 1Mg/m^3 - Answer -False
The percent of total pore space in a soil can be calculated if only the particle density
and the organic matter content are known - Answer -False
