Environmental Studies ยท Biology

Soil Science and Fertilizers

1,537 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 of the following is NOT a key nutrient that is cycled through decomposition?

  1. Carbon

  2. Nitrogen

  3. Phosphorus

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

While carbon, nitrogen, and phosphorus are essential nutrients that are cycled through decomposition, oxygen is not a nutrient in the same sense. Oxygen is a gas that is necessary for respiration and other metabolic processes, but it is not cycled through decomposition in the same way as nutrients.

Multiple choice

Which of the following is NOT a factor that can affect the rate of decomposition in an ecosystem?

  1. Temperature

  2. Moisture

  3. pH

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

While temperature, moisture, and pH are all important factors that affect the rate of decomposition, sunlight is not a direct factor that influences decomposition rates. Sunlight can indirectly affect decomposition rates through its impact on temperature and moisture levels.

Multiple choice

What type of soil contamination is caused by the presence of radioactive materials?

  1. Organic contamination

  2. Inorganic contamination

  3. Biological contamination

  4. Radioactive contamination
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Radioactive contamination occurs when radioactive materials, such as uranium or plutonium, are released into the soil, posing risks to human health and the environment.

Multiple choice

What is the primary method used to assess the extent of soil contamination?

  1. Visual inspection

  2. Soil sampling and analysis

  3. Historical records review

  4. Land use survey
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Soil sampling and analysis is the primary method used to determine the presence and extent of soil contamination, as it allows for the quantification of specific contaminants in the soil.

Multiple choice

Which of the following is NOT a common remediation strategy for soil contamination?

  1. Excavation and disposal

  2. In-situ treatment

  3. Natural attenuation

  4. Fertilizer application
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fertilizer application is not typically used as a remediation strategy for soil contamination, as it may exacerbate the problem by adding additional contaminants to the soil.

Multiple choice

What type of soil contamination is caused by the presence of organic compounds, such as solvents and pesticides?

  1. Organic contamination

  2. Inorganic contamination

  3. Biological contamination

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

Organic contamination refers to the presence of organic compounds, such as solvents and pesticides, in soil, which can pose risks to human health and the environment.

Multiple choice

How does the application of organic fertilizers impact air quality?

  1. It reduces the release of ammonia and nitrous oxide

  2. It improves soil health and fertility

  3. It promotes carbon sequestration and storage

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

The application of organic fertilizers can contribute to improved air quality by reducing the release of ammonia and nitrous oxide, improving soil health and fertility, and promoting carbon sequestration and storage.

Multiple choice

Which of the following is NOT a supporting service that helps regulate the Earth's climate?

  1. Nutrient cycling

  2. Water purification

  3. Pollination

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

Pollination is a regulating service, not a supporting service.

Multiple choice

Which of the following is an example of a physical soil remediation technique?

  1. Phytoremediation

  2. Bioremediation

  3. Soil washing

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

Soil washing involves physically separating contaminants from soil particles using water or other solvents.

Multiple choice

Which of the following is an example of a biological soil remediation technique?

  1. Phytoremediation

  2. Bioremediation

  3. Soil washing

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

Phytoremediation involves using plants to absorb and accumulate contaminants from the soil.

Multiple choice

Which of the following is an example of a chemical soil remediation technique?

  1. Phytoremediation

  2. Bioremediation

  3. Soil washing

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

Incineration involves burning contaminated soil at high temperatures to destroy organic contaminants.

Multiple choice

What is the process of improving the physical, chemical, and biological properties of soil called?

  1. Soil remediation

  2. Soil restoration

  3. Soil reclamation

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

Soil restoration involves improving the physical, chemical, and biological properties of soil to enhance its productivity.

Multiple choice

Which of the following is an example of a soil remediation technology that involves the use of microorganisms?

  1. Phytoremediation

  2. Bioremediation

  3. Soil washing

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

Bioremediation involves using microorganisms to break down and remove contaminants from soil.

Multiple choice

Which of the following is NOT a common type of soil contaminant?

  1. Heavy metals

  2. Pesticides

  3. Fertilizers

  4. Organic matter
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Organic matter is a natural component of soil and is not typically considered a contaminant.

Multiple choice

How does soil contamination affect soil biodiversity?

  1. Reduces the number of soil organisms

  2. Increases the number of soil organisms

  3. Has no effect on soil biodiversity

  4. Increases the diversity of soil organisms
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Soil contamination can reduce the number of soil organisms by creating a toxic environment or by altering the physical and chemical properties of the soil.