SSC 200 EXAM 3: ROLE OF NUTRIENTS
Plants obtain nitrogen from the soil by taking up ________.
Select one:
a. soluble anions
b. soluble organic compounds
c. soluble cations
d. all of the above
e. none of the above - Answer -d
To enable the most consistent and appropriate interpretations, all soil samples
submitted to a particular soil test lab should be taken from the same soil depth,
regardless of differences in the type of tillage used or plants grown.
Select one:
True
False - Answer -False
Nitrification requires the presence of a source of readily available carbon, such as
manure.
Select one:
True
False - Answer -False
Of the macronutrients, which can be most correctly said to be a renewable resource?
Select one:
a. potassium
b. nitrogen
c. calcium
d. phosphorus
e. iron - Answer -b. nitrogen
Compared to land that is not disturbed by tillage, conventionally plowed cropland
usually loses much more ________.
Select one:
a. dissolved P
b. total P
c. particulate P
d. both B and C are correct
e. none of the above is correct - Answer -d. both B and C are correct
Applying heavy dressings of N fertilizer will tend to produce sugary-sweet fruits and
vegetables.
Select one:
True
False - Answer -False
, Nitrogen taken up by plants growing in a compost-treated soil is indistinguishable from
the nitrogen taken up by plants growing in a fertilizer-treated soil.
Select one:
True
False - Answer -True
Fertilization to supply the nutrient element sulfur is often accomplished by which type of
application?
Select one:
a. broadcast of a chloride salt
b. application of a chelate to the soil
c. broadcast of the nearly pure element as a solid
d. incorporation of powdered limestone rock
e. injection of a gas into the soil - Answer -c. broadcast of the nearly pure element as a
solid
A grass cover crop grown on cropland over the winter season in a humid temperate
region can be expected to ________.
Select one:
a. reduce the amount of nutrients leached to the groundwater
b. significantly reduce the amount of nitrogen fertilizer that will be needed to grow the
following crop
c. significantly reduce the amount of water percolating to the water table
d. increase nutrient concentrations in runoff water
e. all of the above - Answer -a. reduce the amount of nutrients leached to the
groundwater
The nutrient most often limiting the growth of aquatic plants and algae in unpolluted
fresh water lakes is ________.
Select one:
a. N
b. K
c. S
d. P
e. none of the above - Answer -d. P
Unlike Rhizobium bacteria, Bradyrhizobium bacteria are effective at fixing N, regardless
of the type of plants present.
Select one:
True
False - Answer -False
Fertilization to supply the nutrient element nitrogen is often accomplished by which type
of application?
Select one:
Plants obtain nitrogen from the soil by taking up ________.
Select one:
a. soluble anions
b. soluble organic compounds
c. soluble cations
d. all of the above
e. none of the above - Answer -d
To enable the most consistent and appropriate interpretations, all soil samples
submitted to a particular soil test lab should be taken from the same soil depth,
regardless of differences in the type of tillage used or plants grown.
Select one:
True
False - Answer -False
Nitrification requires the presence of a source of readily available carbon, such as
manure.
Select one:
True
False - Answer -False
Of the macronutrients, which can be most correctly said to be a renewable resource?
Select one:
a. potassium
b. nitrogen
c. calcium
d. phosphorus
e. iron - Answer -b. nitrogen
Compared to land that is not disturbed by tillage, conventionally plowed cropland
usually loses much more ________.
Select one:
a. dissolved P
b. total P
c. particulate P
d. both B and C are correct
e. none of the above is correct - Answer -d. both B and C are correct
Applying heavy dressings of N fertilizer will tend to produce sugary-sweet fruits and
vegetables.
Select one:
True
False - Answer -False
, Nitrogen taken up by plants growing in a compost-treated soil is indistinguishable from
the nitrogen taken up by plants growing in a fertilizer-treated soil.
Select one:
True
False - Answer -True
Fertilization to supply the nutrient element sulfur is often accomplished by which type of
application?
Select one:
a. broadcast of a chloride salt
b. application of a chelate to the soil
c. broadcast of the nearly pure element as a solid
d. incorporation of powdered limestone rock
e. injection of a gas into the soil - Answer -c. broadcast of the nearly pure element as a
solid
A grass cover crop grown on cropland over the winter season in a humid temperate
region can be expected to ________.
Select one:
a. reduce the amount of nutrients leached to the groundwater
b. significantly reduce the amount of nitrogen fertilizer that will be needed to grow the
following crop
c. significantly reduce the amount of water percolating to the water table
d. increase nutrient concentrations in runoff water
e. all of the above - Answer -a. reduce the amount of nutrients leached to the
groundwater
The nutrient most often limiting the growth of aquatic plants and algae in unpolluted
fresh water lakes is ________.
Select one:
a. N
b. K
c. S
d. P
e. none of the above - Answer -d. P
Unlike Rhizobium bacteria, Bradyrhizobium bacteria are effective at fixing N, regardless
of the type of plants present.
Select one:
True
False - Answer -False
Fertilization to supply the nutrient element nitrogen is often accomplished by which type
of application?
Select one:
