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

How do pesticides and herbicides affect soil fertility?

  1. By reducing the abundance and diversity of soil microorganisms

  2. By altering soil pH and nutrient availability

  3. By accumulating in plant tissues and reducing crop yields

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

Pesticides and herbicides can negatively impact soil fertility by reducing the abundance and diversity of soil microorganisms, altering soil pH and nutrient availability, and accumulating in plant tissues, leading to reduced crop yields.

Multiple choice

Which permaculture technique involves planting nitrogen-fixing plants to improve soil fertility?

  1. Green manuring

  2. Composting

  3. Crop rotation

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

Green manuring is a permaculture technique where nitrogen-fixing plants, such as legumes, are grown and then incorporated into the soil to improve soil fertility.

Multiple choice

What are the main features of the Soil Health Card scheme?

  1. It provides soil health cards to farmers

  2. The cards contain information about the nutrient status of the soil

  3. Farmers can use the cards to make informed decisions about fertilizer application

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

The Soil Health Card scheme provides soil health cards to farmers, the cards contain information about the nutrient status of the soil, and farmers can use the cards to make informed decisions about fertilizer application.

Multiple choice

What is the process by which organic matter decomposes and releases nutrients into the soil?

  1. Erosion

  2. Humification

  3. Weathering

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

Humification is the process by which organic matter decomposes and releases nutrients into the soil, enhancing its fertility.

Multiple choice

What is the process by which soluble salts accumulate in the soil, potentially harming plant growth?

  1. Salinization

  2. Alkalization

  3. Acidification

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

Salinization is the process by which soluble salts accumulate in the soil, often due to poor drainage or irrigation practices, leading to reduced soil fertility and plant growth.

Multiple choice

What is the purpose of composting in Zero Waste Gardening?

  1. To create a nutrient-rich soil amendment.

  2. To reduce the amount of organic waste sent to landfills.

  3. To attract beneficial insects to the garden.

  4. To control pests and diseases.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Composting organic waste, such as food scraps and yard waste, creates a nutrient-rich material that can be used to improve soil quality and reduce the need for synthetic fertilizers.

Multiple choice

What is the benefit of using organic fertilizers in Zero Waste Gardening?

  1. They improve soil structure and fertility.

  2. They reduce the risk of water pollution.

  3. They are less likely to harm beneficial insects.

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

Organic fertilizers, such as compost and manure, provide nutrients to plants while improving soil structure and fertility. They also reduce the risk of water pollution and harm to beneficial insects.

Multiple choice

Which of the following fertilizers is commonly used to provide phosphorus to crops?

  1. Urea

  2. Superphosphate

  3. Potassium Chloride

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

Superphosphate is a common phosphorus fertilizer used to supplement soil phosphorus levels.

Multiple choice

Which of the following is a common type of organic fertilizer?

  1. Compost

  2. Manure

  3. Chemical Fertilizers

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

Compost is an organic fertilizer made from decomposed organic matter.

Multiple choice

Which of the following is a common nitrogen fertilizer?

  1. Urea

  2. Superphosphate

  3. Potassium Chloride

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

Urea is a common nitrogen fertilizer used to supplement soil nitrogen levels.

Multiple choice

Which of the following is a common potassium fertilizer?

  1. Urea

  2. Superphosphate

  3. Potassium Chloride

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

Potassium Chloride is a common potassium fertilizer used to supplement soil potassium levels.

Multiple choice

Which of the following is a common type of organic fertilizer?

  1. Compost

  2. Manure

  3. Chemical Fertilizers

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

Compost is an organic fertilizer made from decomposed organic matter.

Multiple choice

Which soil nutrient is important for root development and is often applied as a fertilizer to improve crop yields?

  1. Nitrogen

  2. Phosphorus

  3. Potassium

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

Phosphorus is important for root development and is often applied as a fertilizer to improve crop yields. Phosphorus deficiency can lead to poor root growth, stunted plants, and reduced seed production.

Multiple choice

How does air pollution affect crop growth and yield?

  1. Enhances photosynthesis and growth

  2. Causes stunted growth and reduced yield

  3. Improves soil fertility

  4. Increases water retention in plants
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Air pollution, particularly ozone and sulfur dioxide, can damage plant tissues, leading to stunted growth, reduced leaf area, and decreased crop yield.

Multiple choice

How does air pollution impact soil quality and fertility?

  1. Enriches soil with essential nutrients

  2. Increases soil pH and alkalinity

  3. Degrades soil structure and nutrient content

  4. Enhances soil moisture retention
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Air pollution can lead to soil acidification, nutrient leaching, and the accumulation of toxic substances, which can harm soil microorganisms and reduce soil fertility.