Environmental Studies ยท Geography

Soil Science

1,499 Questions

Soil Science examines the formation, classification, and properties of soil as a critical natural resource. This hub offers practice questions covering soil horizons, soil types like laterite and black soil, and regional soil characteristics. The content is highly useful for agriculture exams and civil services preparation.

Soil typesSoil horizonsSoil formation factorsAgricultural soil requirementsIndian soilsForest and mountain soils

Soil Science Questions

Multiple choice

Which of the following is a type of foundation commonly used in areas with unstable soil?

  1. Beam Foundation

  2. Slab Foundation

  3. Pier Foundation

  4. Raft Foundation
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pier foundations are commonly used in areas with unstable soil because they transfer the weight of the building to deeper, more stable soil layers.

Multiple choice

What is the primary soil type found in the Gangetic Plains?

  1. Alluvial soil

  2. Black soil

  3. Red soil

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

The Gangetic Plains are known for their fertile alluvial soil, which is deposited by the Ganges River and its tributaries.

Multiple choice

What is the primary factor that determines the texture of a soil?

  1. Sand content

  2. Clay content

  3. Silt content

  4. Organic matter content
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The texture of a soil is primarily determined by the relative proportions of sand, silt, and clay particles in the soil.

Multiple choice

What is the term for the layer of soil that is most affected by human activities?

  1. Topsoil

  2. Subsoil

  3. Parent material

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

Topsoil is the layer of soil that is most affected by human activities, such as agriculture and construction.

Multiple choice

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

  1. Sandy

  2. Silty

  3. Clayey

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

Loamy is not a type of soil texture. It is a term used to describe a soil that has a balanced mixture of sand, silt, and clay.

Multiple choice

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

  1. Single-grained

  2. Massive

  3. Platy

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

Single-grained is not a type of soil structure. It is a term used to describe a soil that has individual soil particles that are not aggregated together.

Multiple choice

What is the term for the layer of soil that is located between the topsoil and the subsoil?

  1. A horizon

  2. B horizon

  3. C horizon

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

The B horizon is the layer of soil that is located between the topsoil and the subsoil.

Multiple choice

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

  1. O horizon

  2. A horizon

  3. B horizon

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

The O horizon is not a type of soil horizon. It is the layer of organic matter that is found on the surface of the soil.

Multiple choice

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

  1. Entisol

  2. Vertisol

  3. Mollisol

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

Entisol is not a type of soil profile. It is a soil order that is characterized by the absence of distinct soil horizons.

Multiple choice

What is the term for a fire that burns underground in the roots and organic matter of the soil?

  1. Ground fire

  2. Surface fire

  3. Crown fire

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

Ground fires burn underground in the roots and organic matter of the soil.

Multiple choice

What is the term for a fire that burns underground in the roots and organic matter of the soil?

  1. Ground fire

  2. Surface fire

  3. Crown fire

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

Ground fires burn underground in the roots and organic matter of the soil.

Multiple choice

Which soil texture is generally considered ideal for viticulture?

  1. Sandy soil

  2. Clay soil

  3. Loam soil

  4. Silt soil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Loam soil, which is a mixture of sand, silt, and clay, is often considered ideal for viticulture due to its ability to provide good drainage, aeration, and water-holding capacity.

Multiple choice

Which soil horizon is known for its accumulation of clay, iron, and aluminum oxides?

  1. A horizon

  2. B horizon

  3. C horizon

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

The B horizon, also known as the subsoil, is characterized by the accumulation of clay, iron, and aluminum oxides, giving it a denser and more compact structure.

Multiple choice

Which soil texture is known for its ideal balance of sand, silt, and clay?

  1. Sandy soil

  2. Clayey soil

  3. Silty soil

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

Loam soil is considered to have an ideal balance of sand, silt, and clay, providing good drainage, water retention, and nutrient availability for plant growth.

Multiple choice

Which soil type is known for its high water-holding capacity and poor drainage?

  1. Sandy soil

  2. Clayey soil

  3. Silty soil

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

Clayey soil has a high water-holding capacity and poor drainage due to its fine texture and tightly packed particles.