midterm 1 review - SSC 100 Fall 2010 Review questions and...

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SSC 100 Fall 2010 Review questions and concepts. What is soil? Differentiate between pedon and profile. To what depth do pedons extend? What are the main soil properties associated with each of the nine master horizons? What are two main properties of an Ap horizon? Bt horizon? Bss horizon? What are the dominant characteristics of each of the 12 soil orders?
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What is the fine-earth fraction? What are coarse fragments? What are the soil separates of the fine-earth fraction. What are their size limits? What are the 16 (or 17 if Ni is included) essential plant nutrient elements? Do primary minerals contain some or all of the essential plant nutrient elements? If so, give some examples.
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What are the basic principles that underpin the hydrometer method for determining particle size distribution? How do you use a textural triangle to identify the soil textural class. Is soil organic carbon content a part of soil texture? What are the three components of the Munsell color system, and what does each describe?
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What are hematite, goethite, and gibbsite? What color does each usually impart to soils?
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