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Environmental Impact of Biofertilizers

Description: Environmental Impact of Biofertilizers
Number of Questions: 15
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Tags: environmental impact biofertilizers agriculture
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What is the primary environmental benefit of using biofertilizers?

  1. Reduced chemical fertilizer usage

  2. Increased soil fertility

  3. Enhanced crop productivity

  4. Improved water quality

Show answer
Correct Option: A
Explanation:

Biofertilizers help reduce the reliance on chemical fertilizers, which can have negative environmental impacts such as water pollution and soil degradation.

Which of the following is NOT a type of biofertilizer?

  1. Rhizobia

  2. Azospirillum

  3. Urea

  4. Phosphate-solubilizing bacteria

Show answer
Correct Option: C
Explanation:

Urea is a synthetic nitrogen fertilizer, not a biofertilizer.

How do biofertilizers contribute to improved soil health?

  1. By fixing atmospheric nitrogen

  2. By solubilizing soil phosphorus

  3. By producing plant growth hormones

  4. All of the above

Show answer
Correct Option: D
Explanation:

Biofertilizers can fix atmospheric nitrogen, solubilize soil phosphorus, and produce plant growth hormones, all of which contribute to improved soil health.

What is the primary mechanism by which rhizobia bacteria benefit legumes?

  1. Nitrogen fixation

  2. Phosphorus solubilization

  3. Potassium mobilization

  4. Iron chelation

Show answer
Correct Option: A
Explanation:

Rhizobia bacteria form symbiotic relationships with legumes, enabling them to fix atmospheric nitrogen and convert it into a usable form for the plant.

Which of the following biofertilizers is commonly used to enhance the availability of phosphorus in the soil?

  1. Rhizobia

  2. Azospirillum

  3. Phosphate-solubilizing bacteria

  4. Potassium-mobilizing bacteria

Show answer
Correct Option: C
Explanation:

Phosphate-solubilizing bacteria release enzymes that convert insoluble phosphorus compounds into soluble forms that can be easily absorbed by plants.

How do biofertilizers contribute to sustainable agriculture?

  1. By reducing the need for chemical fertilizers

  2. By improving soil health and fertility

  3. By enhancing crop productivity and quality

  4. All of the above

Show answer
Correct Option: D
Explanation:

Biofertilizers contribute to sustainable agriculture by reducing the need for chemical fertilizers, improving soil health and fertility, and enhancing crop productivity and quality.

What are the potential drawbacks of using biofertilizers?

  1. They can be less effective than chemical fertilizers

  2. They can be more expensive than chemical fertilizers

  3. They can be difficult to apply and manage

  4. All of the above

Show answer
Correct Option: D
Explanation:

Biofertilizers can be less effective than chemical fertilizers, more expensive, and difficult to apply and manage.

Which of the following is NOT a challenge associated with the use of biofertilizers?

  1. Ensuring their compatibility with different soil types

  2. Maintaining their viability and effectiveness during storage

  3. Overcoming the competition from indigenous soil microorganisms

  4. All of the above are challenges

Show answer
Correct Option: D
Explanation:

All of the options are challenges associated with the use of biofertilizers.

How can the effectiveness of biofertilizers be enhanced?

  1. By selecting the right biofertilizer for the specific crop and soil conditions

  2. By applying biofertilizers at the appropriate time and rate

  3. By combining biofertilizers with organic matter and other soil amendments

  4. All of the above

Show answer
Correct Option: D
Explanation:

The effectiveness of biofertilizers can be enhanced by selecting the right biofertilizer, applying it at the appropriate time and rate, and combining it with organic matter and other soil amendments.

What is the role of mycorrhizae in biofertilization?

  1. They form symbiotic relationships with plant roots

  2. They help plants absorb water and nutrients from the soil

  3. They produce plant growth hormones

  4. All of the above

Show answer
Correct Option: D
Explanation:

Mycorrhizae form symbiotic relationships with plant roots, helping them absorb water and nutrients from the soil, and producing plant growth hormones.

How do biofertilizers contribute to reducing greenhouse gas emissions?

  1. By reducing the use of chemical fertilizers, which can release nitrous oxide

  2. By enhancing soil carbon sequestration

  3. By improving crop productivity, reducing the need for land clearing for agriculture

  4. All of the above

Show answer
Correct Option: D
Explanation:

Biofertilizers contribute to reducing greenhouse gas emissions by reducing the use of chemical fertilizers, enhancing soil carbon sequestration, and improving crop productivity.

Which of the following is NOT a potential environmental risk associated with the use of biofertilizers?

  1. Gene transfer from biofertilizers to other organisms

  2. Eutrophication due to excessive nutrient release

  3. Contamination of water sources with biofertilizer microorganisms

  4. All of the above are potential risks

Show answer
Correct Option: D
Explanation:

All of the options are potential environmental risks associated with the use of biofertilizers.

How can the environmental risks associated with biofertilizers be minimized?

  1. By selecting biofertilizers that are specific to the target crop and soil conditions

  2. By applying biofertilizers at the appropriate time and rate

  3. By monitoring the impact of biofertilizers on soil and water quality

  4. All of the above

Show answer
Correct Option: D
Explanation:

The environmental risks associated with biofertilizers can be minimized by selecting biofertilizers that are specific to the target crop and soil conditions, applying them at the appropriate time and rate, and monitoring their impact on soil and water quality.

What are the future prospects for the use of biofertilizers in agriculture?

  1. Increased adoption due to growing awareness of their benefits

  2. Development of more effective and efficient biofertilizers

  3. Integration of biofertilizers with other sustainable agricultural practices

  4. All of the above

Show answer
Correct Option: D
Explanation:

The future prospects for the use of biofertilizers in agriculture include increased adoption due to growing awareness of their benefits, development of more effective and efficient biofertilizers, and integration with other sustainable agricultural practices.

How can farmers be encouraged to adopt biofertilizers in their agricultural practices?

  1. By providing them with information and training on the benefits and application of biofertilizers

  2. By making biofertilizers easily accessible and affordable

  3. By offering incentives and subsidies for the use of biofertilizers

  4. All of the above

Show answer
Correct Option: D
Explanation:

Farmers can be encouraged to adopt biofertilizers by providing them with information and training, making biofertilizers easily accessible and affordable, and offering incentives and subsidies.

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