The adsorption of water on soil surfaces encourages capillarity.
Indicate whether the statement is true or false
Question 2The polarity of water helps account for the attraction of water molecules for each other.
Indicate whether the statement is true or false
Question 3Which of the following statements concerning applications or capabilities of soil moisture measuring devices is (are) true for the tensiometer?
A) used to turn on irrigation when soil moisture potential reaches -200 kPa
B) requires destructive sampling for each measurement
C) good to turn on automatic irrigation at -50 kPa
D) would give the same reading for both a loamy sand and a silt loam if both contained 15 moisture
E) both A and D
Question 4Which 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?
A) requires destructive sampling for each measurement
B) good to turn on automatic irrigation at -5.0 kPa
C) used to turn on irrigation when soil moisture potential reaches -20.0 kPa
D) gives same reading for loamy sand and silt loam if both contained 15 moisture
E) both A and D
Question 5Plant roots obtain access to soil water in which of the following ways?
A) Water vapor moves from the wet soil areas to the root surfaces.
B) Roots extend into moist soil area.
C) The roots contract and leave room in the pores for the water to move in.
D) Water flows to the roots by capillarity.
E) both B and D
Question 6In which of the following forms of soil water are pesticides, excess plant nutrients and waste chemicals most apt to move through soils?
A) hygroscopic B) available C) gravitational D) capillary E) unsaturated
Question 7At which of the following soil moisture potentials (expressed as kPa) is the waters' energy level lowest?
A) +5 B) -1500 C) -3100 D) 0 E) -31
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