SCSC 301 Exam 2 Practice Exam
Questions & Answers(RATED A+)
The porosity of the soil with a bulk density of 1.7 g/cm^3 and a particle density of 2.5
g/cm^3 is _____%
a. 17
b. 20
c. 25
d. 32
e. 68 - ANSWERd. 32
A soil sample occupies 30 cm^3 and weighs 50 g when wet. When dry the soil
occupies 20 cm^3 and weighs 42 g. What is the gravimetric water content of this soil
sample?
a. 0.16
b. 0.19
c. 0.24
d. 0.50
e. none of the above - ANSWERb. 0.19
Which value most likely represents the particle density of a soil?
a. 1.3
b. 1.6
c. 1.9
d. 2.6
e. 3.3 - ANSWERd. 2.6
Aggregation helps fine-textured soils become more suitable for plant growth because
it ________
a. increases bulk density
b. increases particle density
c. increases microporosity
d. decreases macroporosity
e. increases macroporosity - ANSWERb. increases particle density
The behavior of a soil in response to manipulation at a specificied moisture content
is :
a. aggregation
b. consistence
c. texture
d. structure
e. particle density - ANSWERb. consistence
, The dominant wavelength of light (ie color) reflected by a soil is called ______
a. hue
b. value
c. chroma
d. shade
e. color code - ANSWERa. hue
A soil has a color of 10YR 4/1, the value is, _______ which indicates that the soil is
relatively dark in color.
a. 10
b. YR
c. 10YR
d. 4
e. 1 - ANSWERd. 4
Soil horizons exhibiting a high chroma are probably _____
a. well drained
b. high in organic matter
c. poorly drained
d. poorly aerated
e. dry when the color was determined - ANSWERa. well drained
This is the reddest soil (most intense color) having considerable oxidized iron
compounds. - ANSWERSoil B:
sandy loam
10 cm horizon A
subangular blocky
7.5YR 5/8
1.6 bulk density
This soil is most likely to have the greatest organic matter content. - ANSWERSoil D:
clay loam
30 cm horizon A
massive
7.5 YR 3/1
1.8 bulk density
This soil is likely to have the least amount of micropores. - ANSWERSoil A: (bc sand
based)
sand
40 cm horizon A
single grain structure
7.5 YR 8/1
Organisms that use energy from the sun to manufacture their organic carbon
compounds are _______
Questions & Answers(RATED A+)
The porosity of the soil with a bulk density of 1.7 g/cm^3 and a particle density of 2.5
g/cm^3 is _____%
a. 17
b. 20
c. 25
d. 32
e. 68 - ANSWERd. 32
A soil sample occupies 30 cm^3 and weighs 50 g when wet. When dry the soil
occupies 20 cm^3 and weighs 42 g. What is the gravimetric water content of this soil
sample?
a. 0.16
b. 0.19
c. 0.24
d. 0.50
e. none of the above - ANSWERb. 0.19
Which value most likely represents the particle density of a soil?
a. 1.3
b. 1.6
c. 1.9
d. 2.6
e. 3.3 - ANSWERd. 2.6
Aggregation helps fine-textured soils become more suitable for plant growth because
it ________
a. increases bulk density
b. increases particle density
c. increases microporosity
d. decreases macroporosity
e. increases macroporosity - ANSWERb. increases particle density
The behavior of a soil in response to manipulation at a specificied moisture content
is :
a. aggregation
b. consistence
c. texture
d. structure
e. particle density - ANSWERb. consistence
, The dominant wavelength of light (ie color) reflected by a soil is called ______
a. hue
b. value
c. chroma
d. shade
e. color code - ANSWERa. hue
A soil has a color of 10YR 4/1, the value is, _______ which indicates that the soil is
relatively dark in color.
a. 10
b. YR
c. 10YR
d. 4
e. 1 - ANSWERd. 4
Soil horizons exhibiting a high chroma are probably _____
a. well drained
b. high in organic matter
c. poorly drained
d. poorly aerated
e. dry when the color was determined - ANSWERa. well drained
This is the reddest soil (most intense color) having considerable oxidized iron
compounds. - ANSWERSoil B:
sandy loam
10 cm horizon A
subangular blocky
7.5YR 5/8
1.6 bulk density
This soil is most likely to have the greatest organic matter content. - ANSWERSoil D:
clay loam
30 cm horizon A
massive
7.5 YR 3/1
1.8 bulk density
This soil is likely to have the least amount of micropores. - ANSWERSoil A: (bc sand
based)
sand
40 cm horizon A
single grain structure
7.5 YR 8/1
Organisms that use energy from the sun to manufacture their organic carbon
compounds are _______
