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Soil Microorganisms: Types and Functions

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Soil Microorganisms: Types and Functions

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Questions and Answers

What are the five types of soil microbes mentioned in the text?

Bacteria, fungi, protozoa, nematodes, and viruses

Bacteria, actinomycetes, fungi, protozoa, and nematodes (correct)

Bacteria, actinomycetes, fungi, protozoa, and algae

Bacteria, fungi, protozoa, nematodes, and archaea

What is the typical shape of bacteria found in soil?

Rod (correct)

Spiral

Spherical

Filamentous

Where are most bacteria found in soil?

Bulk soil

Rhizospheric region (correct)

Subsoil

Topsoil

What is a characteristic of bacteria in the rhizosphere compared to those in the bulk soil?

Larger in size Signup and view all the answers

What is a role of bacteria in soil?

Providing ecosystem services Signup and view all the answers

Which of the following bacteria genera is commonly found in soil?

Bacillus Signup and view all the answers

What is the role of polysaccharides and glycoproteins produced by soil bacteria?

They form a layer on the surface of the soil particle, acting as cementing agents Signup and view all the answers

What is the contribution of bacteria in biogeochemical cycles?

They are involved in the production of a large number of nutrients for the soil and the plants Signup and view all the answers

How do bacteria enhance the process of natural succession?

By improving the quality of soil, allowing new plant communities to survive Signup and view all the answers

What is the role of bacterial communities in soil?

They act as indicators of soil condition Signup and view all the answers

What is a negative effect of pathogenic bacteria in the soil?

They result in poor crop health, poor yields, and crop loss Signup and view all the answers

What can be a result of the release of by-products by bacteria in soil?

A change in the chemical properties of soil, such as pH and cation exchange capacity Signup and view all the answers