SWES 200 exam 1 2007 - SWES 200 Introduction to Soil Science Examination I 18 September 2007 True or False 1 Name_KEY T or F A soil survey report

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-1- SWES 200 Introduction to Soil Science Examination I 18 September 2007 Name __ KEY _________ True or False 1. T or F A soil survey report can indicate whether a soil is suitable for septic tank installation. (1) 2. T or F An AE horizon is an A horizon found in a highly eroded soil. (1) 3. T or F Peat is organic material so weathered that individual plant structures are no longer visible. (1) 4. T or F Secondary minerals are re-crystallized products of the chemical breakdown and/or alteration of primary minerals. (1) 5. T or F In most B horizons one of the dominant processes of soil formation has been eluviation. (1) 6. T or F Stoke’s Law describes the rate of fall of an object in a liquid. (1) 7. T or F The Unified soil classification system is a combination of all other U.S. soil classification systems. (1) Multiple Choice 8. Which of the following statements about soils is untrue (2) a. All soils contain organic matter. b. Soils form most readily in cold, arid climates. c. Soils are among the most important natural resources on earth. d. Soils are commonly made up of fragments of bedrock, organic material, and clay minerals. e. Soils form most readily in warm, humid environments. 9. Investigating the soils in southern Alabama, you dig a soil pit easily through a fairly uniform surface horizon that is rather light in color until, at 25 cm deep, your shovel hits a layer of iron-rich, mottled material that is soft when it is wet but hardens severely (like a rock) when it dries. Into which type of soil are you most likely digging? (2) a. Aquoll b. Udult c. Fibrist d. Histel e. Ustert
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-2- 10. An “argillic” diagnostic horizon denotes a(n): (2) a. Accumulation of clay in the subsurface b. Accumulation of organic matter near the surface c. Accumulation of organic matter in the subsurface d. Accumulation of salt 11. Which is the most specific level of soil classification? (2) a. Great group b. Series c. Species d. Order 12. parent material forms in place from the weathering of underlying rock. (2) a. Marine b. Residual c. Alluvial d. Eolian 13. Which of the following is a diagnostic endopedon would you would be likely to find in a desert soil in Southern Arizona?
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This note was uploaded on 04/03/2008 for the course SWES 200 taught by Professor Walworth during the Spring '08 term at University of Arizona- Tucson.

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SWES 200 exam 1 2007 - SWES 200 Introduction to Soil Science Examination I 18 September 2007 True or False 1 Name_KEY T or F A soil survey report

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