SCSC 301 Final Exam Questions and
Answers (Latest Update 2025)
A soil has a bulk density of 1.3 g/cm^3, a particle density of
2.6g/cm^3, a total porosity of .5 and a gravimetric water
content of 0.2. Calculate the water-filled porosity. - Correct
Answer ✅.26
After a growing season of heavy tillage traffic across a soil, a
soil property that is affected is: - Correct Answer ✅bulk
density
From a biological point of view, the most important role of
structural development in clayey textured soils is to provide
an increase in: - Correct Answer ✅macro porosity
The quantity of light reflected by a soil is called: - Correct
Answer ✅value
A word used to describe the consistence of a soil is: - Correct
Answer ✅friable
Calculate the mass of one hectare of soil in kg to 15 cm
depth. - Correct Answer ✅2,250,038
,SCSC 301 Final Exam Questions and
Answers (Latest Update 2025)
In a soil having a color of 10YR 4/1, the chroma is: - Correct
Answer ✅1
At a given partial pressure gradient, diffusion is a function of:
- Correct Answer ✅air-filled porosity
A principal role of oxygen in soils is: - Correct Answer
✅oxidation of organic matter
Considering a soil as a medium for plant growth in terms of
aeration, water supply, and temp, the most desirable
structural type is: - Correct Answer ✅granular
Under normal aerated conditions, soil air compared to the
atmospheric air is almost always contains the same
percentage of: - Correct Answer ✅N2
The soil components--air, solution, solids--arranged in order
of increasing heat capacity (lowest heat capacity first) are: -
Correct Answer ✅air, solids, solution
,SCSC 301 Final Exam Questions and
Answers (Latest Update 2025)
In a clay loam soil horizon having a fine, platy structure, the
soil aeration is likely to be: - Correct Answer ✅poor
Daily fluctuations in temp at 15 cm below the soil surface,
when compared to daily fluctuations at the soil surface: -
Correct Answer ✅occur later in the day
The subsoil in College Station is cooler than either the surface
soil or the parent material: - Correct Answer ✅in early
spring
Water in soil is: - Correct Answer ✅a transporting medium
The amount of heat stored in the soil in the spring at a given
location is primarily a function of soil: - Correct Answer
✅moisture
Water which moves in all directions in a soil consists of water
which moves in response to difference in: - Correct Answer
✅matric potential only
, SCSC 301 Final Exam Questions and
Answers (Latest Update 2025)
Available water in soils is water held between field capacity
and: - Correct Answer ✅wilting coefficient
In a soil layer containing large holes or channels closed at the
surface, water enters the large holes: - Correct Answer
✅only after the surrounding soil is saturated
Water enters a very sandy subsoil from a clayey surface soil: -
Correct Answer ✅only after the clayey soil is saturated
A common primary silicate mineral which weathers to form
secondary silicate minerals in soils is: - Correct Answer
✅feldspars
A typical moist surface soil contains approximately 25% by
volume ___________. - Correct Answer ✅water
One of the most soluble and therefore, easily weather
minerals is: - Correct Answer ✅sylvite
Answers (Latest Update 2025)
A soil has a bulk density of 1.3 g/cm^3, a particle density of
2.6g/cm^3, a total porosity of .5 and a gravimetric water
content of 0.2. Calculate the water-filled porosity. - Correct
Answer ✅.26
After a growing season of heavy tillage traffic across a soil, a
soil property that is affected is: - Correct Answer ✅bulk
density
From a biological point of view, the most important role of
structural development in clayey textured soils is to provide
an increase in: - Correct Answer ✅macro porosity
The quantity of light reflected by a soil is called: - Correct
Answer ✅value
A word used to describe the consistence of a soil is: - Correct
Answer ✅friable
Calculate the mass of one hectare of soil in kg to 15 cm
depth. - Correct Answer ✅2,250,038
,SCSC 301 Final Exam Questions and
Answers (Latest Update 2025)
In a soil having a color of 10YR 4/1, the chroma is: - Correct
Answer ✅1
At a given partial pressure gradient, diffusion is a function of:
- Correct Answer ✅air-filled porosity
A principal role of oxygen in soils is: - Correct Answer
✅oxidation of organic matter
Considering a soil as a medium for plant growth in terms of
aeration, water supply, and temp, the most desirable
structural type is: - Correct Answer ✅granular
Under normal aerated conditions, soil air compared to the
atmospheric air is almost always contains the same
percentage of: - Correct Answer ✅N2
The soil components--air, solution, solids--arranged in order
of increasing heat capacity (lowest heat capacity first) are: -
Correct Answer ✅air, solids, solution
,SCSC 301 Final Exam Questions and
Answers (Latest Update 2025)
In a clay loam soil horizon having a fine, platy structure, the
soil aeration is likely to be: - Correct Answer ✅poor
Daily fluctuations in temp at 15 cm below the soil surface,
when compared to daily fluctuations at the soil surface: -
Correct Answer ✅occur later in the day
The subsoil in College Station is cooler than either the surface
soil or the parent material: - Correct Answer ✅in early
spring
Water in soil is: - Correct Answer ✅a transporting medium
The amount of heat stored in the soil in the spring at a given
location is primarily a function of soil: - Correct Answer
✅moisture
Water which moves in all directions in a soil consists of water
which moves in response to difference in: - Correct Answer
✅matric potential only
, SCSC 301 Final Exam Questions and
Answers (Latest Update 2025)
Available water in soils is water held between field capacity
and: - Correct Answer ✅wilting coefficient
In a soil layer containing large holes or channels closed at the
surface, water enters the large holes: - Correct Answer
✅only after the surrounding soil is saturated
Water enters a very sandy subsoil from a clayey surface soil: -
Correct Answer ✅only after the clayey soil is saturated
A common primary silicate mineral which weathers to form
secondary silicate minerals in soils is: - Correct Answer
✅feldspars
A typical moist surface soil contains approximately 25% by
volume ___________. - Correct Answer ✅water
One of the most soluble and therefore, easily weather
minerals is: - Correct Answer ✅sylvite
