AP Environmental Science Quiz
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LAND AND WATER USE
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A utility offers rebates for efficient irrigation; which metric best indicates improved water-use efficiency?
A
Higher total water pumped per hectare, because increased pumping ensures crops never experience stress and maximizes yield.
B
Lower crop yield per hectare, because reduced yield indicates less water was applied and therefore higher efficiency.
C
Lower volume of water applied per unit yield (e.g., liters per kilogram), reflecting less water used to produce the same output.
D
Higher evaporation rate from soil, because faster evaporation indicates rapid infiltration and reduced runoff losses.
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