Soil Organic Matter

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Soil Organic Matter

• Chapter 12

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• I. Global Carbon Cycle
• II. Process of Decomposition
• III. Factors Controlling Rates of Decomp
• IV. Humus
• V. Composting

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• I. Global Carbon Cycle
• A. Pathways
• B. Carbon sources to soil

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• II. Process of Decomposition
• A. Definition
• B. Composition of plant material
• C. Aerobic decomposition
• D. Anaerobic decomposition
• E. Mineralization

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• III. Factors Controlling Rates of Decomposition
  and Mineralization
• A. Environmental Conditions
• B. Residue Quality

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Figure 12.7
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• IV. Humus
• A. Definitions
• B. Colloidal Characteristics

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Figure 12.9
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• V. Composting

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Fig. 12.13
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Fig. 12.12