Under normal conditions, the partial False
pressure O2 will be greater in the soil air
whereas that of CO2 will be greater in air
atmosphere.
T/F
Soil aeration can be improved by: b. increasing macropores
a. increasing compaction
b. increasing macropores
c. increasing moisture content
d. all the above
Soil aerobic respiration takes place under False
limited free O2 whereas anaerobic takes
place under plenty of free O2.
T/F
Which of the following is true about soil b. as soil depth increases, co2 increases
content of CO2?
a. as soil depth increases, CO2 decreases
b. as soil depth increases, CO2 increases
c. soil CO2 is inversely proportional to soil
N2
d. a and c
, Ammonium nitrate (NH4+) oxidation to a. NH4+ will accumulate
NO3- is accomplished by the presence of
O2 and soil microbes. What will
happen if there were no nitrosomonas
bacteria in the soil?
a. NH4+ will accumulate
b. NO2- will accumulate
c. NO3- will accumulate
d. none of the above
Which of the following is one of the criteria a. hydrophytic plants
for a wetland?
a. hydrophytic plants
b. oxidized Fe
c. non-hydric soils
d. none of the above.
Under optimum condition, biochemical b. 10
reactions will double for every ____ oC
increases.
a. 5 b. 10 c. 20 d. none of the above
As you travel from Miami, Florida to c. temperature zones
Buffalo, NY, you will witness a very distinct
vegetation changes. This is mainly
due to changes in:
a. soil type
b. moisture regimes
c. temperature zones
d. population density.
A high school in Oklahoma and most heat False
pumps are buried in dry soil because dry
soil has high thermal conductivity
and low specific heat that makes it a good
insulator.
a. True b. False
What will be the heat capacity (HC) of a d. none of the above
moist soil that has 80 g soil and 20 g of
water in cal/g? (Hint: HC of soil and
water is 0.2 cal/g and 1 ca/g, respectively.)
a. 16
b. 20
c. 36
d. none of the above
As demonstrated with graphite and false
diamond in this class, soil mineral
crystallinity is not as important as
composition.
a. True b. False
Soil colloids: b. can have negative charges
a. have large sizes
b. can have negative charges
c. have small surface area
d. all of the above.