CSES 2040 TEST 3 FALL UPDATED ACTUAL Questions and CORRECT
Answers
Which of the following pools contain the soil
largest amount of the world's carbon,
relatively?
vegetation
soil
vegetation and atmosphere combined
atmosphere
Soil organic matter is the lifeblood of soil increases soil CEC
because it:
destroys soil microbes
provides oxygen for photosynthesis
increases soil CEC
increases soil density
Which of the following is not a net ocean
contributor to the air atmosphere CO2
pool?
fossil fuels
soil and fossil fuels
soil
ocean
The largest amount of soil organic fraction passive
is contained in the ________ fraction.
active
slow
anthropogenic
passive
https://quizlet.com/552853648/cses-2040-test-3-fall-2020-flash-cards/ 1/10
, The microbial decomposition of organic true
compounds to yield inorganic molecules
such as N, P, etc., is called mineralization
while the reverse process by which soluble
inorganic soil nutrients are incorporated to
organic materials is called immobilization.
True
False
A simple equation for photosynthesis is both starch and oxygen production if water is not limiting
given as: CO2 + H2O = C6H12O6 (starch)+
O2. According to this equation, an increase
in atmospheric CO2 will increase:
both starch and oxygen production if water
is not limiting
water production
starch production
oxygen production
The three essential elements that make up C,O, and H
more than 90% by weight of a green plant
are:
C, O, N
C, Ca and N
N, P and K
C, O and H
To avoid a nitrate depression period, the 0
minimum amount of nitrogen (kg) that must
be added to an organic residue that
contains 4000 kg of C and 160 kg of N will
be:
160
0
25
100
Priming effect describes the increased TRUE
decomposition of relatively stable soil
humus under enhanced microbial activity
when fresh plant residue is added to the
soil.
True
False
he C: N ratio of a typical Ap or B soil 10:1
horizon is approximately:
1:1
1:10
100:10:1
10:1
https://quizlet.com/552853648/cses-2040-test-3-fall-2020-flash-cards/ 2/10
Answers
Which of the following pools contain the soil
largest amount of the world's carbon,
relatively?
vegetation
soil
vegetation and atmosphere combined
atmosphere
Soil organic matter is the lifeblood of soil increases soil CEC
because it:
destroys soil microbes
provides oxygen for photosynthesis
increases soil CEC
increases soil density
Which of the following is not a net ocean
contributor to the air atmosphere CO2
pool?
fossil fuels
soil and fossil fuels
soil
ocean
The largest amount of soil organic fraction passive
is contained in the ________ fraction.
active
slow
anthropogenic
passive
https://quizlet.com/552853648/cses-2040-test-3-fall-2020-flash-cards/ 1/10
, The microbial decomposition of organic true
compounds to yield inorganic molecules
such as N, P, etc., is called mineralization
while the reverse process by which soluble
inorganic soil nutrients are incorporated to
organic materials is called immobilization.
True
False
A simple equation for photosynthesis is both starch and oxygen production if water is not limiting
given as: CO2 + H2O = C6H12O6 (starch)+
O2. According to this equation, an increase
in atmospheric CO2 will increase:
both starch and oxygen production if water
is not limiting
water production
starch production
oxygen production
The three essential elements that make up C,O, and H
more than 90% by weight of a green plant
are:
C, O, N
C, Ca and N
N, P and K
C, O and H
To avoid a nitrate depression period, the 0
minimum amount of nitrogen (kg) that must
be added to an organic residue that
contains 4000 kg of C and 160 kg of N will
be:
160
0
25
100
Priming effect describes the increased TRUE
decomposition of relatively stable soil
humus under enhanced microbial activity
when fresh plant residue is added to the
soil.
True
False
he C: N ratio of a typical Ap or B soil 10:1
horizon is approximately:
1:1
1:10
100:10:1
10:1
https://quizlet.com/552853648/cses-2040-test-3-fall-2020-flash-cards/ 2/10
