Title: Unit 6 Quiz
Course: HRT 135 Soils and Fertilizers > Section: HRT 135 Soils and Fertilizers

Q: Food chain or food web does not exist in the soil.
- True
- False
A: False

Q: Aerobes are microorganisms that require air to live.
- True
- False
A: True

Q: Earthworms and beetles in the soil break down plant and animal residues which enhances soil fertility.
- True
- False
A: True

Q: Soil organisms are essential for recycling plant nutrients
- True
- False
A: True

Q: Decomposition of dead organic matter leads to soil contamination with harmful pathogens.
- True
- False
A: False

Q: Humic acid produced by bacteria and fungi are harmful to plant roots.
- True
- False
A: False

Q: Protozoans and nematodes are living organisms that can enrich soil fertility.
- True
- False
A: True

Q: Earthworms can create soil burrows which aerate the soil for healthier root growth.
- True
- False
A: True

Q: Micorrhizal fungi not only improve availability of phosphorus for plant growth u also protects roots from harmful pathogens.
- True
- False
A: True

Q: Nitrifying bacteria in the soil can prevent nitrogen availability to plant roots.
- True
- False
A: False

Q: What is the role of nitrifying bacteria in the soil?

Q: What type of soil texture improves the soil fertility for proper plant growth?

Q: Identify one of the five soil organisms and their action in the soil.

Q: How does soil biodiversity help in the enhancement of soil fertility?

Q: Define each of the following terms:

- Decomposition
- Mineralization
- Immobilization
- Rhizosphere
- Nutrient cycling