SSC 200: The Cyclying of Water thru Soil Exam#1 Questions with
Correct Answers
Which of the following means of estimating soil water levels gives a direct
measurement of the water content?
Select one:
a. tensiometer
b. pressure membrane
c. gravimetric determinations
d. neutron scattering
e. gypsum blocks - ✔✔c. gravimetric determinations
The hydrogen end of a water molecule is attracted to positively charged cations
such as Na+ and Ca2+.
Select one:
True
False - ✔✔False
Vapor loss from a south-facing slope in Australia would likely be higher than from
a north-facing slope.
Select one:
True
False - ✔✔False
Where high-value crops or individual ornamental shrubs are to be grown and
water is expensive, the most efficient type of irrigation to use would be ________.
,Select one:
a. basin flooding
b. furrow
c. drip or trickle
d. center pivot - ✔✔c. drip or trickle
The adsorption of water on soil surfaces encourages capillarity.
Select one:
True
False - ✔✔True
The partial pressure (i.e. concentration) of CO2 in the soil pores is higher than the
partial pressure of this gas in the atmosphere.
Select one:
True
False - ✔✔True
In which of the following "forms" of soil water are pesticides, excess plant
nutrients and waste chemicals most apt to move through soils?
Select one:
a. capillary
b. unsaturated
c. hygroscopic
d. available
e. gravitational - ✔✔e. gravitational
, The process of aerobic respiration is a significant source of which of the following
gases?
Select one:
a. carbon dioxide
b. ammonia
c. oxygen
d. methane
e. nitrogen - ✔✔a. carbon dioxide
Plant roots gain access to soil water primarily by the growth of the roots into
moist soil.
Select one:
True
False - ✔✔False
The leaf area index significantly affects the solar radiation reaching the soil
surface.
Select one:
True
False - ✔✔True
Which of the following will not increase the efficiency of water use by plants in an
irrigation system?
Select one:
Correct Answers
Which of the following means of estimating soil water levels gives a direct
measurement of the water content?
Select one:
a. tensiometer
b. pressure membrane
c. gravimetric determinations
d. neutron scattering
e. gypsum blocks - ✔✔c. gravimetric determinations
The hydrogen end of a water molecule is attracted to positively charged cations
such as Na+ and Ca2+.
Select one:
True
False - ✔✔False
Vapor loss from a south-facing slope in Australia would likely be higher than from
a north-facing slope.
Select one:
True
False - ✔✔False
Where high-value crops or individual ornamental shrubs are to be grown and
water is expensive, the most efficient type of irrigation to use would be ________.
,Select one:
a. basin flooding
b. furrow
c. drip or trickle
d. center pivot - ✔✔c. drip or trickle
The adsorption of water on soil surfaces encourages capillarity.
Select one:
True
False - ✔✔True
The partial pressure (i.e. concentration) of CO2 in the soil pores is higher than the
partial pressure of this gas in the atmosphere.
Select one:
True
False - ✔✔True
In which of the following "forms" of soil water are pesticides, excess plant
nutrients and waste chemicals most apt to move through soils?
Select one:
a. capillary
b. unsaturated
c. hygroscopic
d. available
e. gravitational - ✔✔e. gravitational
, The process of aerobic respiration is a significant source of which of the following
gases?
Select one:
a. carbon dioxide
b. ammonia
c. oxygen
d. methane
e. nitrogen - ✔✔a. carbon dioxide
Plant roots gain access to soil water primarily by the growth of the roots into
moist soil.
Select one:
True
False - ✔✔False
The leaf area index significantly affects the solar radiation reaching the soil
surface.
Select one:
True
False - ✔✔True
Which of the following will not increase the efficiency of water use by plants in an
irrigation system?
Select one:
