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 a common source of phosphorus fertilizer?

  1. Urea

  2. Potassium chloride

  3. Superphosphate

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

Superphosphate is a common source of phosphorus fertilizer because it is a concentrated source of phosphorus and is relatively inexpensive to produce.

Multiple choice

Which of the following is a common source of potassium fertilizer?

  1. Urea

  2. Potassium chloride

  3. Compost

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

Potassium chloride is a common source of potassium fertilizer because it is a concentrated source of potassium and is relatively inexpensive to produce.

Multiple choice

Which of the following is a non-sustainable fertilizer practice?

  1. Applying fertilizers at the wrong time or in the wrong amount

  2. Using synthetic fertilizers

  3. Using fast-release fertilizers

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

All of these practices can contribute to the environmental impact of fertilizers.

Multiple choice

What is the primary role of soil in agriculture?

  1. Providing physical support to plants

  2. Storing and supplying water to plants

  3. Providing nutrients for plant growth

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

Soil plays a crucial role in agriculture by providing physical support to plants, storing and supplying water to plants, and providing essential nutrients for plant growth.

Multiple choice

What is the term used to describe the process of adding nutrients to soil?

  1. Fertilization

  2. Irrigation

  3. Tillage

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

Fertilization is the process of adding nutrients to soil to improve its fertility and support plant growth.

Multiple choice

What is the term used to describe the process of improving soil structure and fertility?

  1. Tillage

  2. Mulching

  3. Composting

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

Tillage, mulching, and composting are all practices that can help improve soil structure and fertility.

Multiple choice

What is the primary role of organic matter in soil?

  1. Improving soil structure

  2. Increasing water-holding capacity

  3. Providing nutrients for plant growth

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

Organic matter plays a crucial role in soil by improving soil structure, increasing water-holding capacity, and providing essential nutrients for plant growth.

Multiple choice

What is the primary role of soil microorganisms in agriculture?

  1. Decomposing organic matter

  2. Cycling nutrients

  3. Fixing nitrogen

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

Soil microorganisms play a crucial role in agriculture by decomposing organic matter, cycling nutrients, and fixing nitrogen, which are essential for plant growth.

Multiple choice

Which fertilizer is commonly used to provide phosphorus to crops?

  1. Ammonium nitrate

  2. Superphosphate

  3. Potassium chloride

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

Superphosphate is a common fertilizer used to provide phosphorus to crops. It is typically applied during the early stages of plant growth to promote root development and overall plant vigor.

Multiple choice

Which soil amendment is commonly used to reduce soil acidity?

  1. Lime

  2. Gypsum

  3. Sulfur

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

Lime is commonly used as a soil amendment to reduce soil acidity. It neutralizes acids in the soil, raising the pH level and making it more suitable for crop growth.

Multiple choice

Which fertilizer is commonly used to provide sulfur to crops?

  1. Ammonium sulfate

  2. Potassium sulfate

  3. Calcium sulfate

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

Ammonium sulfate is a common fertilizer used to provide sulfur to crops. It is typically applied to crops that have a high demand for sulfur, such as cruciferous vegetables and legumes.

Multiple choice

Which soil amendment is commonly used to improve soil structure?

  1. Organic matter

  2. Sand

  3. Clay

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

Organic matter, such as compost, manure, and crop residues, is commonly used to improve soil structure. It enhances soil aggregation, increases water-holding capacity, and promotes microbial activity.

Multiple choice

Which fertilizer is commonly used to provide zinc to crops?

  1. Zinc sulfate

  2. Zinc oxide

  3. Zinc chelate

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

Zinc sulfate is a common fertilizer used to provide zinc to crops. It is typically applied to crops that are prone to zinc deficiency, such as corn, soybeans, and citrus trees.

Multiple choice

Which of the following is a common type of phytoremediation technology?

  1. Landfarming

  2. Constructed wetlands

  3. Green roofs

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

Landfarming is a process that involves spreading contaminated soil over a large area and allowing plants to grow on it.

Multiple choice

Which of the following is NOT a common type of vegetable fertilizer?

  1. Compost

  2. Manure

  3. Chemical fertilizers

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

Mulch is not a fertilizer, but rather a material used to cover the soil surface to suppress weeds, retain moisture, and improve soil health.