Soils Geography

5.

Biological Properties and Soil Organisms

5.1.

Soil Biota Classification

5.1.1.

5.1.1.1.

5.1.1.1.1.

Ecological Functions

5.1.1.1.2.

Casting Production

5.1.1.1.3.

Burrow Formation

5.1.1.2.

5.1.1.2.1.

5.1.1.2.2.

5.1.1.2.3.

5.1.1.3.

5.1.1.3.1.

Burrowing Mammals

5.1.1.3.2.

Soil Disturbance

5.1.2.

5.1.2.1.

5.1.2.2.

5.1.2.3.

5.1.3.

5.1.3.1.

5.1.3.1.1.

5.1.3.1.2.

Population Dynamics

5.1.3.2.

5.1.3.2.1.

5.1.3.2.2.

5.1.3.2.3.

5.1.3.3.

5.1.4.

5.1.4.1.

5.1.4.1.1.

Heterotrophic Bacteria

5.1.4.1.2.

Autotrophic Bacteria

5.1.4.1.3.

Nitrogen-Fixing Bacteria

5.1.4.2.

5.1.4.2.1.

Saprophytic Fungi

5.1.4.2.2.

Mycorrhizal Fungi

5.1.4.2.3.

Pathogenic Fungi

5.1.4.3.

5.1.4.4.

Algae and Cyanobacteria

5.2.

Biological Processes in Soil

5.2.1.

Organic Matter Decomposition

5.2.1.1.

Litter Breakdown

5.2.1.2.

Enzymatic Processes

5.2.1.3.

Mineralization Rates

5.2.2.

Nutrient Cycling

5.2.2.1.

Nitrogen Transformations

5.2.2.2.

Phosphorus Mobilization

5.2.2.3.

5.2.2.4.

Micronutrient Cycling

5.2.3.

Soil Structure Development

5.2.3.1.

Aggregate Formation

5.2.3.2.

Binding Agent Production

5.2.3.3.

5.2.4.

5.2.4.1.

5.2.4.2.

Horizon Development

5.2.4.3.

Profile Modification

5.3.

Soil Food Web Dynamics

5.3.1.

Energy Flow Pathways

5.3.1.1.

Bacterial Channel

5.3.1.2.

5.3.2.

Trophic Interactions

5.3.2.1.

Primary Decomposers

5.3.2.2.

Secondary Consumers

5.3.2.3.

5.3.3.

Nutrient Release Mechanisms

5.3.3.1.

Microbial Turnover

5.3.3.2.

Predation Effects

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6. Soil Formation Processes and Factors