SOIL

1. microorganism in soil

1.1. bacteria

1.1.1. decomposers

1.1.2. mutualist

1.1.3. pathogens

1.1.4. lithotroph / chemoautotrophs

1.2. protozoa

1.2.1. mineralizing nutrients

1.2.2. regulating bacteria populations

1.2.3. food source

1.3. fungi

1.3.1. function

1.3.1.1. decomposers

1.3.1.2. mutualists

1.3.1.3. pathogens/ parasite

1.3.1.3.1. viruses

1.3.1.3.2. verticillium

1.3.1.3.3. pythium

1.3.1.3.4. rhizoctonia

1.3.2. microbe plant interaction

1.3.2.1. epiphytes

1.3.2.2. endophytes

1.3.2.3. microbe that live in the above ground (phyllosphere)

1.3.2.4. some microbe inhibit below ground plant tissues

1.3.2.4.1. rhizosphere

1.3.2.4.2. rhizoplane

1.3.3. mycorrhizae

1.3.3.1. endomycorrhizae

1.3.3.1.1. arbuscular mycorrhizae

1.3.3.2. ectomycorrhizae

2. as microbial habitat

2.1. complex

2.2. large variety of habitat

2.3. supported by complex physical and chemical environment

2.3.1. soil particles

2.3.2. pore space

2.3.3. components

2.3.4. microbes

3. categories

3.1. mineral soil

3.2. organic soil

4. SOM

4.1. retain nutrient

4.2. maintain soil structure

4.3. hold water for plant use

5. physicochemical condition

5.1. surface

5.2. water

5.3. temperature

5.4. acidity and alkalinity

5.5. soil atmosphere