Under optimum conditions, as temperature increases by 10C, bio chemical reactions
will:
a. increase 100x
b. double
c. decrease 10x
d. none of the above
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b. double
The process of aerobic respiration is a significant source of:
a. methane
b. oxygen
c. nitrogen
d. carbon dioxide
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d. carbon dioxide
Which soil water potential represents the dries soil condition? Under these conditions,
water would likely move via matric forces.
30 kPa
10 kPa
-10 kPa
-30 kPa
0 kPa
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-30 kPa
Which of the following substitution creates a net negative charge on a neutral soil?
a. one Ca+2 ion for one K+1 ion
b. one Al+3 ion for one Si+4 ion
c. one Al+3 ion for one Fe+3 ion
d. all of the above
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b. one Al+3 ion for one Si+4 ion
Ammonium acetate is used to determine soil CEC that was fertilized with NH4+ by the
displacement method. In this situation, the correct CEC will be:
a. overestimated
, b. underestimated
c. the same, no change
d. none of the above
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b. underestimated
The best management practice(s) to prevent surface evapotranspiration is(are)
all of the practices listed can prevent evapotranspiration
weed control
irrigation
increased seeding rate
covering the soil with mulch
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all of the practices listed can prevent evapotranspiration weed control
Saturated water flow is best described by which of the following answers?
Movement of water due to capillary or matric water potential
Movement of water primarily in micropores
Movement of water in earthworm channels, cracks, and other macropores
Movement of water primarily through macropores due to gravitational forces
Movement of water only when the soil is near the permanent wilting point
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will:
a. increase 100x
b. double
c. decrease 10x
d. none of the above
Give this one a try later!
b. double
The process of aerobic respiration is a significant source of:
a. methane
b. oxygen
c. nitrogen
d. carbon dioxide
,Give this one a try later!
d. carbon dioxide
Which soil water potential represents the dries soil condition? Under these conditions,
water would likely move via matric forces.
30 kPa
10 kPa
-10 kPa
-30 kPa
0 kPa
Give this one a try later!
-30 kPa
Which of the following substitution creates a net negative charge on a neutral soil?
a. one Ca+2 ion for one K+1 ion
b. one Al+3 ion for one Si+4 ion
c. one Al+3 ion for one Fe+3 ion
d. all of the above
Give this one a try later!
b. one Al+3 ion for one Si+4 ion
Ammonium acetate is used to determine soil CEC that was fertilized with NH4+ by the
displacement method. In this situation, the correct CEC will be:
a. overestimated
, b. underestimated
c. the same, no change
d. none of the above
Give this one a try later!
b. underestimated
The best management practice(s) to prevent surface evapotranspiration is(are)
all of the practices listed can prevent evapotranspiration
weed control
irrigation
increased seeding rate
covering the soil with mulch
Give this one a try later!
all of the practices listed can prevent evapotranspiration weed control
Saturated water flow is best described by which of the following answers?
Movement of water due to capillary or matric water potential
Movement of water primarily in micropores
Movement of water in earthworm channels, cracks, and other macropores
Movement of water primarily through macropores due to gravitational forces
Movement of water only when the soil is near the permanent wilting point
Give this one a try later!
