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TAMU SCSC 301 Final Exam Questions and Answers (Latest Update 2025)
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TAMU SCSC 301 Final Exam Questions and Answers (Latest Update 2025)
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TAMU SCSC 301 Final Exam Questionsand Answers (Latest Update 2025)
After a growing season of heavy tillage traffic across a soil, a
soil property that is least affected is: - Correct Answer
✅Particle 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 purity of light reflected by a soil is called: - Correct
Answer ✅chroma
A word used to describe the consistence of a soil is: - Correct
Answer ✅plastic
A soil horizon in which the supply of gases is adequate for
optimum biological activity is said to: - Correct Answer
✅be well aerated
In a soil, having a color of 10YR 4/1, the value is: - Correct
Answer ✅4
,TAMU SCSC 301 Final Exam Questions
and Answers (Latest Update 2025)
10Y - hue
1 - chroma
At a given pressure gradient, diffusion is a function of: -
Correct Answer ✅total air porosity
A principal role of oxygen is soils is: - Correct Answer
✅oxidation of iron
Considering a soil as a medium for plant growth in terms of
aeration, water supply, and temperature, the most desirable
structural type is: - Correct Answer ✅granular
Under normal aerated conditions, soil air compared to the
atmospheric air almost always contains the same percentage
of: - Correct Answer ✅N2
The soil components - solids, solution, air - arranged in order
of decreasing heat capacity (highest capacity first) are: -
Correct Answer ✅solution, solids, air
,TAMU SCSC 301 Final Exam Questions
and Answers (Latest Update 2025)
In a clay loam soil horizon having a strongly developed fine,
granular structure, the soil aeration is likely to be: - Correct
Answer ✅good
Daily fluctuations in temperature at 15cm below the soil
surface, when compared to daily fluctuations at 2cm below
the soil surface: - Correct Answer ✅occur later in the day
The subsoil is cooler than either the surface soil or parent
material: - Correct Answer ✅in early spring
Water in the soil is: - Correct Answer ✅a good heat sink
The rate of soil warming in the spring at a given location is
primarily a function of soil: - Correct Answer ✅moisture
Water which drains downward in a soil consists of water
which moves in response to differences in: - Correct Answer
✅matric and gravitational potentials
, TAMU SCSC 301 Final Exam Questions
and Answers (Latest Update 2025)
Available water in soils is water held between the wilting
coefficient and: - Correct Answer ✅field capacity
In a soil layer containing large holes or channels open at the
surface, water enters the large holes: - Correct Answer
✅by gravity flow only
Water enters a very clayey subsoil from a sandy surface soil: -
Correct Answer ✅as soon as the wetting front reaches it
A common primary silicate mineral which weathers to form
secondary silicate minerals in soils is: - Correct Answer
✅horneblend
A typical moist surface soil contains approximately 1 to 5%
by volume of ____________. - Correct Answer ✅organic
matter
One of the more soluble and therefore, easily weathered
minerals in acid soils is: - Correct Answer ✅calcite
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