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Unformatted text preview: c /kg d. 200 cmol c /kg 4. (30) Compare and contrast humic and nonhumic soil substances (i.e., what are they and how are they similar and different?). 5. (40) What are four benefits of organic matter on soil properties? (extra credit) examine todays cookie model and describe what mineral and/or soil materials it could illustrate (more credit for more specific detail)...
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- Spring '10