Environmental Studies · 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

Salination in soil is caused due to _________.

  1. increased use of pesticides

  2. over utilization of soil resources

  3. overgrazing by animals

  4. over irrigation by canals and wells

  5. none of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Owing to over irrigation and capillary action,  the soil is becoming alkaline and about 50% of land is affected by this area.

Multiple choice

Directions: Answer the following question by selecting the most appropriate option.

In rural areas, cow dung is used to coat the floor and walls of huts to

  1. give a natural colour to the floor

  2. keep the insects away

  3. make them smooth and clean

  4. make them rough to increase friction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cow dung is traditionally used as a coating material in rural areas because it creates a smooth, clean surface when dried. It also acts as a natural insect repellent and provides some thermal insulation for the hut.

Multiple choice

Which of the following is the correct statement?

  1. Metals, minerals and petroleum are artificial resources.

  2. Water and soil are not essential for plant and animals.

  3. Thick growth of plants and trees is called desert.

  4. Use of manure and fertilizers increases the crop yield.

  5. Plants need average soil to grow.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, use of manure and fertilizers increases the crop yield. This is the correct statement.

Multiple choice

How do cyclones affect the fertility of soil?

  1. They donot affect the fertility of the soil.

  2. The fertility of soil is reduced.

  3. The fertility of soil is increased.

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The fertility of soil is reduced.

Multiple choice

_______ is used for the reclamation of acidic soil.

  1. Lime

  2. Rice

  3. Sodium

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

Lime (calcium carbonate or calcium oxide) neutralizes soil acidity by raising pH levels, making nutrients more available to plants. Calcium is an element, while lime is the specific agricultural amendment applied to acidic soils.

Multiple choice

Why is organic manure better than fertilisers?

  1. Decreases the number of microbes

  2. Easily absorbed

  3. Improves the texture of the soil

  4. Easily washed away by water

  5. Decreases the water holding capacity of the soil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Manures add plenty of humus to the soil and improves the texture of the soil.