SSC 200: Exam 3 || A+ Score Secured.
Plants can only obtain nitrogen from the soil by taking up soluble anions. In general cations
cannot be absorbed by plants (TF) correct answers False
_____ is not a characteristic of soil colloids.
a. Very small size
b. High surface area
c. Ability to exchange ions with the soil solution
d. Low water holding capacity correct answers d. Low water holding capacity
Some nitrogen-containing fertilizers are significant sources of soil acidity in cultivated soils (TF)
correct answers True
Which of the following is a micronutrient?
a. Magnesium
b. Manganese
c. Nitrogen
d. Sulfur correct answers b. Manganese
The conversion of the nitrate nitrogen to N2 is ____.
a. denitrification
b. immobilization
c. nitrification
d. mineralization correct answers a. denitrification
Soil phosphorus is associated with eutrophication of fresh water lakes (TF) correct answers True
,Which of these ions would be held more tightly
than calcium within the cation exchange complex?
a. Aluminum
b. Magnesium
c. Potassium
d. Sodium correct answers a. Aluminum
Micronutrient deficiencies are more likely to occur where inorganic chemical fertilizers, rather
than organic manures, have been used to stimulate vigorous plant growth (TF). correct answers
True
What property of clays does isomorphic substitution affect?
a. The ability to shrink and swell
b. Whether it's classed as 2:1 or 1:1.
c. The amount of specific surface area.
d. The cation exchange capacity correct answers d. The cation exchange capacity
Which of the following increases soil acidity.
a. Leaching of basic cations
b. Application of ammonium sources of nitrogen fertilizers
c. Weathering of clay minerals that release aluminum
d. All of the above correct answers d. All of the above
In order for nitrate to form from soil organic matter, Nitrosomonas must be present in the soil but
Nitrobacter need not be present (TF) correct answers False
Residual soil acidity is a measure of the _____.
a. hydrogen ion activity in the soil solution
, b. aluminum and hydrogen ions attracted towards the charge of the clay and humus surfaces
c. aluminum and hydrogen bound to the charge of the clay and humus surfaces. correct answers
c. aluminum and hydrogen bound to the charge of the clay and humus surfaces.
In soil science, CEC is an abbreviation for _____.
a. Calcium Exchange Component
b. Carbonated Electrical Circuits
c. Cation Exchange Capacity
d. Cationic Eluviation Center correct answers c. Cation Exchange Capacity
Most nitrogen leaching to groundwater is in the form of ammonium (TF) correct answers False
When considering an appropriate lime recommendation, following variables should be
considered:
a. Current soil pH
b. Crop to be grown
c. Organic matter content
d. All of the above correct answers d. All of the above
Which cation does not promote soil flocculation?
a. Aluminum
b. Calcium
c. Potassium
d. Sodium correct answers d. Sodium
The octahedron building unit of a clay crystal contains _____ atoms.
a. 1 aluminum and 4 oxygen
b. 1 aluminum and 6 oxygen
Plants can only obtain nitrogen from the soil by taking up soluble anions. In general cations
cannot be absorbed by plants (TF) correct answers False
_____ is not a characteristic of soil colloids.
a. Very small size
b. High surface area
c. Ability to exchange ions with the soil solution
d. Low water holding capacity correct answers d. Low water holding capacity
Some nitrogen-containing fertilizers are significant sources of soil acidity in cultivated soils (TF)
correct answers True
Which of the following is a micronutrient?
a. Magnesium
b. Manganese
c. Nitrogen
d. Sulfur correct answers b. Manganese
The conversion of the nitrate nitrogen to N2 is ____.
a. denitrification
b. immobilization
c. nitrification
d. mineralization correct answers a. denitrification
Soil phosphorus is associated with eutrophication of fresh water lakes (TF) correct answers True
,Which of these ions would be held more tightly
than calcium within the cation exchange complex?
a. Aluminum
b. Magnesium
c. Potassium
d. Sodium correct answers a. Aluminum
Micronutrient deficiencies are more likely to occur where inorganic chemical fertilizers, rather
than organic manures, have been used to stimulate vigorous plant growth (TF). correct answers
True
What property of clays does isomorphic substitution affect?
a. The ability to shrink and swell
b. Whether it's classed as 2:1 or 1:1.
c. The amount of specific surface area.
d. The cation exchange capacity correct answers d. The cation exchange capacity
Which of the following increases soil acidity.
a. Leaching of basic cations
b. Application of ammonium sources of nitrogen fertilizers
c. Weathering of clay minerals that release aluminum
d. All of the above correct answers d. All of the above
In order for nitrate to form from soil organic matter, Nitrosomonas must be present in the soil but
Nitrobacter need not be present (TF) correct answers False
Residual soil acidity is a measure of the _____.
a. hydrogen ion activity in the soil solution
, b. aluminum and hydrogen ions attracted towards the charge of the clay and humus surfaces
c. aluminum and hydrogen bound to the charge of the clay and humus surfaces. correct answers
c. aluminum and hydrogen bound to the charge of the clay and humus surfaces.
In soil science, CEC is an abbreviation for _____.
a. Calcium Exchange Component
b. Carbonated Electrical Circuits
c. Cation Exchange Capacity
d. Cationic Eluviation Center correct answers c. Cation Exchange Capacity
Most nitrogen leaching to groundwater is in the form of ammonium (TF) correct answers False
When considering an appropriate lime recommendation, following variables should be
considered:
a. Current soil pH
b. Crop to be grown
c. Organic matter content
d. All of the above correct answers d. All of the above
Which cation does not promote soil flocculation?
a. Aluminum
b. Calcium
c. Potassium
d. Sodium correct answers d. Sodium
The octahedron building unit of a clay crystal contains _____ atoms.
a. 1 aluminum and 4 oxygen
b. 1 aluminum and 6 oxygen
