Agronomy 180 - Assignment 7 - part 1 and 2 | Questions And Answers Latest {2024- 2025}
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Water is denser in the solid state than the liquid state. - False
The fraction of global crop land irrigated is ~20-25% and the percentage of crop production irrigated
~33-40%. What explains the difference in those two numbers? - irrigated crops produce a higher yield
If the air has a relative humidity of 40% and a vapor pressure of 2 kPa, what is the temperature of air
(°C)? (Hint: calculate the saturation vapor pressure for each answer below, then plug them into the
relative humidity equation until you get one that gives 0.40. Alternatively you can use the chart below) -
35°C
Fill in the blank. Near the equator, the sun heats the earth ________than at the poles, this is due to
___________. The warm air near surface around the equator _________ because it is __________than
the environment creating a persistent _________. The air then circulates through the __________ and
descends around __________ causing persistent desert regions. - More, lambert's cosine law, rises,
warmer and less dense, low pressure at the surface, Hadley Cell, 25-30 deg N and 25-30 deg S.
Use the global hydrologic cycle diagram to answer the questions 5 and 6.
What is the total (over ocean and land) global average annual precipitation rate in terms of volume
[km3/year]? - 5.02 X 10^5 km^3/year
What is the total (over ocean and land) global average annual precipitation rate in terms of mass
(kg/year)? - 5.02 x 10^17 kg/year
Use your answer from number 5 and 6 and follow the steps below (#7-9) to calculate the global total
(over ocean and land) average annual precipitation rate in terms of depth [mm/year].
(Hint: Use a land area of 510 X 106 km2 and remember 1mm of water over 1 m2 weighs 1 kg. ) First
calculate the area average rainfall rate on a mass basis [kg km-2/year]. - 9.84 x 10^8 kg km ^-2/year
How much does 1 mm of water over 1 km^2 weigh? (Hint: remember your unit is squared) - 1 x 10^6 kg
What is the global annual average precipitation rate in terms of depth? - 984 mm/year
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