NCSU SSC 200 Exam II || Answered Perfectly 100%.
For any soil, the bulk density is always higher than the particle density. correct answers False
Structure refers to the shape and size of aggregates formed by individual particles binding into
peds. correct answers True
The polarity of water has nothing to do with the attraction of water molecules for each other.
correct answers False
The percentage of the soil's volume that is occupied by pores is called _______. correct answers
Porosity
Which of the following actions would best ensure good aeration in a soil?
-increases the soil temperature
-add organic residues
-use cover crops
-remove excess water correct answers Removes excess water
Soil water potential is the sum of the forces of gravity, adhesion and cohesion. It has little to do
with the presence or absence of salts. correct answers False
A subsoil zone that stays wet more often than its dry will probably be dominated by ______
colors. correct answers grey
Select the appropriate structure: Soil has no visible structure and is hard to break apart. correct
answers Massive
, The attraction of water to the soil solids, responsible for capillary flow, is the _______. correct
answers Matric potential
In texture by feel methods, this component accounts for longer ribbon formation. correct answers
Clay
Which soil textural class would have the lowest bulk density? correct answers Clay
The amount of plant available water contained in the soil is primarily a function of ________.
correct answers pore size distribution
What is the formula for bulk density? correct answers Oven dry weight (g) / Volume of Soil
(cm3)
The clay fraction is represented by particles less than _____ in size. correct answers <0.002 mm
During the growing season of any plant (forest species, agronomic crops or horticultural plants)
the two major losses of plant available water in the soil are: correct answers Evaporation and
Transpiration
Soil macropores ______. correct answers drain due to the force of gravity
The soil water potential is a measure of the potential of a soil to hold water. correct answers
False
Assuming an equal volume of soil, which textural class would you predict would have the lowest
total porespace? correct answers Sand
Yellowish-brown colors in subsurface horizons are caused by ______ in the soil. correct answers
Iron minerals
For any soil, the bulk density is always higher than the particle density. correct answers False
Structure refers to the shape and size of aggregates formed by individual particles binding into
peds. correct answers True
The polarity of water has nothing to do with the attraction of water molecules for each other.
correct answers False
The percentage of the soil's volume that is occupied by pores is called _______. correct answers
Porosity
Which of the following actions would best ensure good aeration in a soil?
-increases the soil temperature
-add organic residues
-use cover crops
-remove excess water correct answers Removes excess water
Soil water potential is the sum of the forces of gravity, adhesion and cohesion. It has little to do
with the presence or absence of salts. correct answers False
A subsoil zone that stays wet more often than its dry will probably be dominated by ______
colors. correct answers grey
Select the appropriate structure: Soil has no visible structure and is hard to break apart. correct
answers Massive
, The attraction of water to the soil solids, responsible for capillary flow, is the _______. correct
answers Matric potential
In texture by feel methods, this component accounts for longer ribbon formation. correct answers
Clay
Which soil textural class would have the lowest bulk density? correct answers Clay
The amount of plant available water contained in the soil is primarily a function of ________.
correct answers pore size distribution
What is the formula for bulk density? correct answers Oven dry weight (g) / Volume of Soil
(cm3)
The clay fraction is represented by particles less than _____ in size. correct answers <0.002 mm
During the growing season of any plant (forest species, agronomic crops or horticultural plants)
the two major losses of plant available water in the soil are: correct answers Evaporation and
Transpiration
Soil macropores ______. correct answers drain due to the force of gravity
The soil water potential is a measure of the potential of a soil to hold water. correct answers
False
Assuming an equal volume of soil, which textural class would you predict would have the lowest
total porespace? correct answers Sand
Yellowish-brown colors in subsurface horizons are caused by ______ in the soil. correct answers
Iron minerals
