Environmental Studies ยท Biology

Soil Science and Fertilizers

1,509 Questions

Soil science focuses on soil formation, classification, and fertility management using fertilizers and organic amendments. Agricultural and environmental science exams heavily feature questions on biofertilizers, mycorrhiza, and phytoremediation. Practice these questions to build a strong understanding of soil nutrient cycles.

Phytoremediation techniquesOrganic soil amendmentsBiofertilizers and mycorrhizaNitrous oxide emissionsIn-situ soil remediationGreen manuring effects

Soil Science and Fertilizers Questions

Multiple choice

Which soil amendment is commonly used to increase soil porosity and drainage?

  1. Sand

  2. Clay

  3. Silt

  4. Compost
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sand is commonly used to improve soil drainage and porosity by increasing the size of soil particles.

Multiple choice

How does 'Compost' contribute to zero waste?

  1. Converting organic waste into nutrient-rich soil

  2. Promoting the use of synthetic fertilizers

  3. Encouraging excessive food consumption

  4. Supporting the disposal of organic waste in landfills
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Composting involves breaking down organic waste into nutrient-rich soil, reducing the amount of organic waste sent to landfills and providing natural fertilizer for plants.

Multiple choice

What is the term used to describe the process by which soil releases carbon dioxide into the atmosphere?

  1. Respiration

  2. Decomposition

  3. Nitrification

  4. Denitrification
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Respiration is the process by which soil releases carbon dioxide into the atmosphere. Respiration is carried out by microorganisms in the soil that break down organic matter.

Multiple choice

What is the term for the process of replacing lost topsoil with new soil material?

  1. Soil remediation

  2. Soil restoration

  3. Soil replenishment

  4. Soil replacement
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Soil replacement involves bringing in new soil material to replace lost topsoil.

Multiple choice

What is the term for the process of removing contaminants from soil?

  1. Soil remediation

  2. Soil restoration

  3. Soil replenishment

  4. Soil replacement
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Soil remediation involves removing contaminants from soil through various techniques.

Multiple choice

What is the name of the mineral that is commonly used in the production of fertilizer?

  1. Potassium chloride

  2. Sodium nitrate

  3. Ammonium nitrate

  4. Urea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Potassium chloride is a common mineral used in the production of fertilizer, providing potassium, an essential nutrient for plant growth.

Multiple choice

Which type of bioremediation involves the use of plants to remove or neutralize contaminants from the soil?

  1. Phytoremediation

  2. Mycoremediation

  3. Bioaugmentation

  4. Bioventing
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phytoremediation is the type of bioremediation that involves the use of plants to remove or neutralize contaminants from the soil.

Multiple choice

Which type of bioremediation involves the use of fungi to remove or neutralize contaminants from the soil?

  1. Phytoremediation

  2. Mycoremediation

  3. Bioaugmentation

  4. Bioventing
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mycoremediation is the type of bioremediation that involves the use of fungi to remove or neutralize contaminants from the soil.

Multiple choice

Which type of bioremediation involves the use of enzymes to remove or neutralize contaminants from the soil?

  1. Phytoremediation

  2. Mycoremediation

  3. Bioaugmentation

  4. Bioventing
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bioaugmentation is the type of bioremediation that involves the use of enzymes to remove or neutralize contaminants from the soil.

Multiple choice

What is the ideal carbon-to-nitrogen ratio for composting?

  1. 10:1

  2. 20:1

  3. 30:1

  4. 40:1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A carbon-to-nitrogen ratio of 30:1 is generally considered ideal for composting.

Multiple choice

What is the primary role of compost in soil health?

  1. Provides nutrients for plants

  2. Improves soil structure

  3. Enhances water infiltration

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Compost provides nutrients for plants, improves soil structure, and enhances water infiltration.

Multiple choice

Which of the following is NOT a benefit of using compost in agriculture?

  1. Reduces the need for chemical fertilizers

  2. Improves crop yields

  3. Controls soil erosion

  4. Increases soil salinity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Compost does not increase soil salinity, but rather helps to balance soil pH and improve soil health.

Multiple choice

What is the most common method of applying compost to gardens and fields?

  1. Top-dressing

  2. Side-dressing

  3. In-furrow application

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Compost can be applied to gardens and fields using various methods, including top-dressing, side-dressing, and in-furrow application.

Multiple choice

How does compost help in reducing the need for chemical fertilizers?

  1. Provides essential nutrients for plant growth

  2. Enhances soil microbial activity

  3. Improves soil water-holding capacity

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Compost provides essential nutrients, enhances soil microbial activity, and improves soil water-holding capacity, reducing the need for chemical fertilizers.

Multiple choice

How does compost help in controlling soil erosion?

  1. Improves soil structure

  2. Increases soil organic matter

  3. Enhances water infiltration

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Compost improves soil structure, increases soil organic matter, and enhances water infiltration, all of which help in controlling soil erosion.