Ch 12 Study Guide IB by HC120808081717

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                  Ch. 12 Test Review: Soil Resources (33 points)

Read Ch. 12
Create a table and answer the “To do” questions on page 243 (12 points)

Define/explain the following:
horizon



humus layer



P:E ratio



translocation



salinization



leaching



gleying



ferallitization



macronutrients



clay
silt



sand



nitrogen fixation



nitrification



denitrification



decomposition



assimilation



Haber process



Answer the following questions:
   1. Define soil.



       2. What is soil made from?



       3. You pick up a small amount of soil. It feels sticky and can be rolled into a ball
          easily. What type of soil is it?
4. Draw and label a soil profile. Include the following horizons: A, B C, E, O, and
   R.




5. Soil formation occurs in three stages. List and explain them.




6. Draw and label a diagram of the nitrogen cycle.




7. What are the three main processes of soil erosion?
8. List three examples of human activities that lead to soil degradation.




9. List five human practices that can conserve and/or improve the soil.




10. Explain why soil is considered a non-renewable resource/natural capital.
11. Using the soil classification triangle above, answer the following questions:

   A. What type of soil is 20% clay, 40% silt, and 40% sand?______________________


   B. What type of soil is 30% clay, 30% silt, and 40% sand?______________________


   C. What type of soil is 5% clay, 5% silt, and 90% sand?______________________


   D. What type of soil is 60% clay, 20% silt, and 20% sand?______________________


   E. What type of soil is 10% clay, 60% silt, and 30% sand?______________________

								
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