SSC 200 Quiz 5 || with Certified Answers.
The leaf area index significantly affects the solar radiation reaching the soil surface. correct
answers True
Hysteresis is the phenomenon whereby a soil has the same water content/potential relationship
when it is being dried as when it is being wetted. correct answers False
Which of the following is not a major factor in determining the soil aeration status?
Select one:
a. volume of macropores
b. carbon dioxide
c. nitrogen gas
d. oxygen
e. redox potential correct answers c. nitrogen gas
Most irrigation systems are very inefficient with less than half the water that is taken from
streams ever reaching the plants. correct answers True
Which of the following statements concerning applications or capabilities of soil moisture
measuring devices is (are) true for the use of a drying oven and balance?
Select one:
a. requires "destructive sampling" for each measurement
b. used to turn on irrigation when soil moisture potential reaches -20.0 kPa
c. good to turn on automatic irrigation at -5.0 kPa
d. is an indirect measurement of soil water correct answers a. requires "destructive sampling" for
each measurement
, A soil on the south facing slope in Canada is likely to be drier and warmer than a comparable soil
on a north facing slope. correct answers True
Which of the following means of estimating soil water levels gives a direct measurement of the
water content?
Select one:
a. gypsum blocks
b. gravimetric determinations
c. tensiometer
d. pressure membrane
e. neutron scattering correct answers b. gravimetric determinations
Sprinkle irrigation is generally more efficient in the use of water than drip irrigation, especially
for high valued crops. correct answers False
The property of cohesion in water stems from the attraction of water molecules for soil solids.
correct answers False
An abundance of macropores in soils helps assure an abundance of oxygen in the soil. correct
answers True
Which of the following will increase the evaporation (E) from the soil surface?
Select one:
a. the use of no-till culture
b. adding straw mulch to the soil surface
c. plastic mulch
d. stubble mulch farming
e. none of the above correct answers e. none of the above
The leaf area index significantly affects the solar radiation reaching the soil surface. correct
answers True
Hysteresis is the phenomenon whereby a soil has the same water content/potential relationship
when it is being dried as when it is being wetted. correct answers False
Which of the following is not a major factor in determining the soil aeration status?
Select one:
a. volume of macropores
b. carbon dioxide
c. nitrogen gas
d. oxygen
e. redox potential correct answers c. nitrogen gas
Most irrigation systems are very inefficient with less than half the water that is taken from
streams ever reaching the plants. correct answers True
Which of the following statements concerning applications or capabilities of soil moisture
measuring devices is (are) true for the use of a drying oven and balance?
Select one:
a. requires "destructive sampling" for each measurement
b. used to turn on irrigation when soil moisture potential reaches -20.0 kPa
c. good to turn on automatic irrigation at -5.0 kPa
d. is an indirect measurement of soil water correct answers a. requires "destructive sampling" for
each measurement
, A soil on the south facing slope in Canada is likely to be drier and warmer than a comparable soil
on a north facing slope. correct answers True
Which of the following means of estimating soil water levels gives a direct measurement of the
water content?
Select one:
a. gypsum blocks
b. gravimetric determinations
c. tensiometer
d. pressure membrane
e. neutron scattering correct answers b. gravimetric determinations
Sprinkle irrigation is generally more efficient in the use of water than drip irrigation, especially
for high valued crops. correct answers False
The property of cohesion in water stems from the attraction of water molecules for soil solids.
correct answers False
An abundance of macropores in soils helps assure an abundance of oxygen in the soil. correct
answers True
Which of the following will increase the evaporation (E) from the soil surface?
Select one:
a. the use of no-till culture
b. adding straw mulch to the soil surface
c. plastic mulch
d. stubble mulch farming
e. none of the above correct answers e. none of the above
