Exam 6: Soil and the Hydrologic Cycle

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The evapotranspiration (ET) from a pine forest was found to be 50 cm during a growing season.If the evaporation from the soil surface during this period of time was 5 cm, what is the level of loss from leaf surfaces?

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Some two-thirds of the solar energy reaching the earth is absorbed by water on or near the earth's surface.

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There is a net movement of clouds from land areas to the ocean areas in the hydrologic cycle.

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Which of the following locations in the United States would have the highest evaporation (E) from the soil surface in July?

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Drip irrigation would more likely be used in the production of apples or peaches than in the production of wheat.

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Land drainage is beneficial because _____.

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Which of the following irrigation systems produces the most biomass per unit of water applied?

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Sprinkle irrigation is generally more efficient in the use of water than drip irrigation, especially for high valued crops.

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Soil and crop management generally has a greater influence on evaporation from the soil surface (E) than on transpiration (T) from leaf surfaces.

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Which of the following will not increase the efficiency of water use by plants in an irrigation system?

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In a field experiment you noted that 300 tons of water was transpired to produce 1 ton of corn (dry weight).If alfalfa had been grown in the same field instead of corn, which of the following would most likely have been the amount of water transpired?

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Urban development of land under natural vegetation or agriculture usually greatly _____ soil infiltration capacity and therefore greatly increases _______.

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Groundwater _____.

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Evapotranspiration includes vapor losses both from the soil surface and from the leaves of plants.

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The likelihood of polluting groundwater with pesticides and plant nutrients is enhanced by _____.

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The leaf area index significantly affects the solar radiation reaching the soil surface.

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Drainage pipe comes in 200 ft long rolls.The number of rolls needed to construct a uniform buried drainage system for a nearly level 20 hectare field will depend primarily on _____________.

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Conservation tillage can have a significant direct effect on transpiration of water from a rapidly growing crop of corn.

(True/False)
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Vapor loss from a south-facing slope in Australia would likely be higher than from a north-facing slope.

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Eutrophication is enhanced by the presence of pesticides in the water draining from agricultural soils.

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