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

What is the best way to tell if compost is ready?

  1. It has a dark, crumbly texture

  2. It smells like fresh soil

  3. It has a neutral pH

  4. It is cool to the touch
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Compost is ready when it has a dark, crumbly texture and smells like fresh soil.

Multiple choice

What is the best way to use compost?

  1. Add it to garden soil

  2. Use it as a mulch

  3. Use it as a potting mix

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

Compost can be used to improve the soil in gardens, as a mulch to suppress weeds and retain moisture, and as a potting mix for plants.

Multiple choice

What is the best way to use compost tea?

  1. Water plants with it

  2. Spray it on leaves

  3. Add it to the soil

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

Compost tea can be used to water plants, spray on leaves, and add to the soil to improve plant growth.

Multiple choice

What is the best way to prevent weeds from growing in compost?

  1. Cover the pile

  2. Turn the pile

  3. Add water

  4. Add green materials
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Covering the compost pile helps to prevent weeds from growing by blocking sunlight and preventing seeds from germinating.

Multiple choice

Which type of soil pollutant is known for its persistence and ability to accumulate in the food chain?

  1. Heavy metals

  2. Pesticides

  3. Petroleum hydrocarbons

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

Heavy metals, such as lead, mercury, and cadmium, are persistent pollutants that can accumulate in the food chain, posing health risks to humans and wildlife.

Multiple choice

How can soil contamination affect the quality of groundwater?

  1. It can contaminate groundwater with harmful chemicals.

  2. It can alter the pH balance of groundwater.

  3. It can reduce the availability of groundwater.

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

Soil contamination can contaminate groundwater with harmful chemicals, alter its pH balance, and reduce its availability, posing health risks to those who rely on groundwater for drinking and irrigation.

Multiple choice

Which soil amendment is commonly used to reduce the bioavailability of heavy metals in contaminated soil?

  1. Limestone

  2. Compost

  3. Activated carbon

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

Limestone is often used as a soil amendment to reduce the bioavailability of heavy metals in contaminated soil by increasing the soil pH and forming less soluble metal compounds.

Multiple choice

What is the primary role of microorganisms in soil pollution remediation?

  1. To degrade organic contaminants

  2. To immobilize heavy metals

  3. To stimulate plant growth

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

Microorganisms play a crucial role in soil pollution remediation by degrading organic contaminants, immobilizing heavy metals, stimulating plant growth, and enhancing the overall health of the soil ecosystem.

Multiple choice

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

  1. Potassium nitrate

  2. Sodium nitrate

  3. Ammonium nitrate

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

Potassium nitrate is a mineral that is commonly used in the production of fertilizer. It provides plants with essential nutrients, particularly nitrogen and potassium.

Multiple choice

What is the primary benefit of composting?

  1. Reduces landfill waste

  2. Enriches soil quality

  3. Eliminates the need for chemical fertilizers

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

Composting offers multiple benefits, including reducing landfill waste, enriching soil quality, and eliminating the need for chemical fertilizers.

Multiple choice

How does composting enrich soil quality?

  1. By adding nutrients to the soil

  2. By improving soil structure

  3. By increasing soil biodiversity

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

Composting enriches soil quality by adding nutrients, improving soil structure, and increasing soil biodiversity.

Multiple choice

Why is eliminating the need for chemical fertilizers important?

  1. Chemical fertilizers can harm the environment

  2. Chemical fertilizers can be expensive

  3. Chemical fertilizers can be harmful to human health

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

Eliminating the need for chemical fertilizers is important because they can harm the environment, be expensive, and be harmful to human health.

Multiple choice

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

  1. 25:1

  2. 30:1

  3. 35:1

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

The ideal carbon-to-nitrogen ratio for composting is 30:1.

Multiple choice

What is the role of oxygen in composting?

  1. It helps break down organic matter

  2. It prevents the growth of harmful bacteria

  3. It generates heat

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

Oxygen plays multiple roles in composting, including breaking down organic matter, preventing the growth of harmful bacteria, and generating heat.

Multiple choice

What is the role of moisture in composting?

  1. It helps break down organic matter

  2. It prevents the growth of harmful bacteria

  3. It generates heat

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

Moisture plays multiple roles in composting, including breaking down organic matter, preventing the growth of harmful bacteria, and generating heat.