Soil Science and Management

6.

Soil Biology and Organic Matter

6.1.

6.1.1.

Classification by Size

6.1.1.1.

6.1.1.1.1.

6.1.1.1.2.

6.1.1.1.3.

6.1.1.2.

6.1.1.2.1.

6.1.1.2.2.

6.1.1.2.3.

6.1.1.3.

6.1.1.3.1.

6.1.1.3.2.

6.1.1.3.3.

6.1.1.4.

6.1.1.4.1.

6.1.1.4.2.

6.1.1.4.3.

6.1.1.4.4.

6.1.1.4.5.

6.2.

6.2.1.

6.2.1.1.

Primary Producers

6.2.1.2.

Primary Consumers

6.2.1.3.

Secondary Consumers

6.2.1.4.

6.2.2.

6.2.3.

Nutrient Cycling

6.3.

Functions of Soil Organisms

6.3.1.

Organic Matter Decomposition

6.3.1.1.

6.3.1.2.

Chemical Breakdown

6.3.1.3.

6.3.2.

Nutrient Cycling

6.3.2.1.

Nitrogen Transformations

6.3.2.2.

Phosphorus Cycling

6.3.2.3.

6.3.3.

Soil Structure Formation

6.3.3.1.

Aggregate Formation

6.3.3.2.

6.3.4.

Plant Interactions

6.3.4.1.

Symbiotic Relationships

6.3.4.2.

Pathogenic Relationships

6.3.4.3.

Beneficial Associations

6.3.5.

Pollutant Degradation

6.4.

Soil Organic Matter

6.4.1.

Sources of Organic Matter

6.4.1.1.

6.4.1.2.

6.4.1.3.

Microbial Biomass

6.4.1.4.

Animal Residues

6.4.2.

Composition of Organic Matter

6.4.2.1.

6.4.2.2.

6.4.2.3.

6.4.2.4.

6.4.2.5.

Humic Substances

6.4.3.

Decomposition Processes

6.4.3.1.

Factors Affecting Decomposition

6.4.3.1.1.

6.4.3.1.2.

6.4.3.1.3.

Oxygen Availability

6.4.3.1.4.

6.4.3.1.5.

Substrate Quality

6.4.4.

Humus Formation

6.4.4.1.

Humification Pathways

6.4.4.2.

Humic Acid Formation

6.4.4.3.

Fulvic Acid Formation

6.4.5.

Functions of Organic Matter

6.4.5.1.

Nutrient Supply

6.4.5.2.

Water Retention

6.4.5.3.

6.4.5.4.

Cation Exchange

6.4.5.5.

6.4.6.

Management of Organic Matter

6.4.6.1.

Crop Residue Management

6.4.6.2.

6.4.6.3.

Organic Amendments

6.4.6.4.

Tillage Effects

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5. Soil Chemistry and Mineralogy

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7. Plant Nutrition and Soil Fertility