SWES 200 exam 2 2008

SWES 200 exam 2 2008 - SWES 200 EXAM 2 Useful facts Name...

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SWES 200, EXAM 2 Name _______________________ March 13, 2008 Seat ________ Row __________ Useful facts: Particle density = 2.65 g/cm 3 Volume of a cylinder = height x radius x 3.14 2 Density of water = 1 g/cm 3 True/False (1 point each) 1. T or F Compared to the atmosphere, the air in soil pores is likely to have higher levels 2 of CO 2. T or F Compared to the atmosphere, the air in soil pores is likely to have higher levels 2 of O . 3. T or F Soil structure is determined by soil texture and can not be changed by management practices. 4. T or F The AASHTO soil classification system describes engineering properties of soils. 5. T or F Most layer silicate clay particles are positively (+) charged. 6. T or F A gleyed soil is indicative of extended water-logging conditions. 7. T or F Cation exchange capacity of Al and Fe oxides increases as pH increases. 8. T or F A layer of sand in the profile of a clay loam soil will increase the rate of unsaturated water flow through the soil. 9. T or F In a given soil, saturated water flow is faster than unsaturated water flow. 10. T or F Water in soil has lower (more negative) free energy than pure water outside the soil. Multiple Choice (2 points each) 11. At a matric potential of -30 kPa, which of the following soils will hold the greatest amount of water? a. Loamy sand b. Clay loam c. Loam d. All will hold the same amount of water
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2 12. At a gravimetric water content of 25%, in which of the soils below will the matric potential be lowest (most negative)? a. loamy sand b. clay loam c. loam d. All will be the same 13. Which of these textural size classes has the highest plant available water holding capacity?
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This test prep was uploaded on 04/03/2008 for the course SWES 200 taught by Professor Walworth during the Spring '08 term at Arizona.

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SWES 200 exam 2 2008 - SWES 200 EXAM 2 Useful facts Name...

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