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 of the following is an example of a controlled-release phosphorus fertilizer?

  1. Triple superphosphate

  2. Monoammonium phosphate

  3. Rock phosphate

  4. Polymer-coated phosphorus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Polymer-coated phosphorus is a controlled-release phosphorus fertilizer where phosphorus is coated with a polymer material, regulating the release of phosphorus over time.

Multiple choice

How do controlled-release fertilizers affect soil acidification?

  1. They increase soil acidification

  2. They have no significant impact on soil acidification

  3. They reduce soil acidification

  4. They increase soil acidification in acidic soils but reduce it in alkaline soils
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Controlled-release fertilizers reduce soil acidification by releasing nutrients gradually, minimizing the potential for excessive nutrient application and subsequent soil acidification.

Multiple choice

Which of the following is an example of a controlled-release potassium fertilizer?

  1. Potassium chloride

  2. Potassium sulfate

  3. Potassium nitrate

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

Potassium polyphosphate is a controlled-release potassium fertilizer where potassium is combined with polyphosphate, regulating the release of potassium over an extended period.

Multiple choice

How do controlled-release fertilizers impact soil microbial activity?

  1. They decrease soil microbial activity

  2. They have no significant impact on soil microbial activity

  3. They increase soil microbial activity

  4. They increase soil microbial activity in acidic soils but decrease it in alkaline soils
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Controlled-release fertilizers increase soil microbial activity by providing a steady supply of nutrients, supporting the growth and diversity of beneficial soil microorganisms.

Multiple choice

Which of the following is NOT a type of soil amendment?

  1. Compost

  2. Manure

  3. Fertilizer

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

Pesticides are used to control pests and diseases, while compost, manure, and fertilizer are all used to improve soil fertility.

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.