Environmental Studies ยท Geography

Soil Science

1,537 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 an example of a texture gradient?

  1. The texture of a brick wall

  2. The texture of a grassy field

  3. The texture of a sandy beach

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

All of the examples provided are examples of texture gradients, which are depth cues that help us perceive depth in an image based on the changes in texture density.

Multiple choice

Which type of soil is known for its high water-retention capacity and low permeability?

  1. Sandy soil

  2. Clay soil

  3. Silty soil

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

Clay soil has a high proportion of fine particles, resulting in high water-retention capacity and low permeability.

Multiple choice

Which type of soil is most susceptible to contamination?

  1. Sandy soil

  2. Clayey soil

  3. Loamy soil

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

Sandy soil has a low capacity to retain contaminants due to its large pore spaces, making it more susceptible to contamination.

Multiple choice

Which of the following is NOT an ecosystem service provided by soil biodiversity?

  1. Nutrient cycling

  2. Water filtration

  3. Carbon sequestration

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

Erosion control is not directly related to soil biodiversity, but rather to the physical properties of the soil and the presence of vegetation.

Multiple choice

Which of the following is NOT a strategy for remediating soil contamination?

  1. Excavation and disposal

  2. Bioremediation

  3. Phytoremediation

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

Landfilling is not a remediation strategy, but rather a method of disposal for contaminated soil.

Multiple choice

What is the primary factor that influences the rate of soil formation?

  1. Climate

  2. Vegetation

  3. Parent material

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

The type of parent material (e.g., rock, sediment) determines the mineral composition and texture of the soil, which in turn affects the rate of soil formation.

Multiple choice

Which of the following is NOT a factor that influences the formation of soil structure?

  1. Plant roots

  2. Earthworms

  3. Climate

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

Fire is a factor that can destroy soil structure, but it does not directly influence the formation of soil structure.

Multiple choice

Which of the following is NOT a factor that influences the formation of soil horizons?

  1. Climate

  2. Vegetation

  3. Parent material

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

Time is a factor that influences the development of soil horizons, but it does not directly influence the formation of soil horizons.

Multiple choice

Which soil characteristic has the greatest influence on the mobility of contaminants?

  1. Texture

  2. pH

  3. Organic matter content

  4. Bulk density
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Organic matter content has the greatest influence on the mobility of contaminants because it can bind to contaminants and reduce their movement through the soil profile.

Multiple choice

What is the importance of erosion control in supporting services?

  1. It helps to prevent soil loss.

  2. It reduces the risk of flooding.

  3. It improves water quality.

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

Erosion control is important for supporting services as it helps to prevent soil loss, reduce the risk of flooding, and improve water quality.

Multiple choice

Which type of soil is best suited for drip irrigation?

  1. Sandy soil

  2. Clay soil

  3. Loam soil

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

Loam soil, which has a balanced composition of sand, silt, and clay, is ideal for drip irrigation as it allows for good water infiltration and drainage.

Multiple choice

Which of the following is not a common soil pollutant?

  1. Arsenic

  2. Cadmium

  3. Phosphorus

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

Phosphorus is an essential nutrient for plant growth and is not typically considered a soil pollutant.

Multiple choice

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

  1. Chemical contamination

  2. Biological contamination

  3. Physical contamination

  4. Radioactive contamination
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Soil contamination can be classified into three types: chemical contamination, biological contamination, and radioactive contamination. Physical contamination is not a type of soil contamination.

Multiple choice

Which of the following is NOT a potential source of chemical soil contamination?

  1. Industrial activities

  2. Mining

  3. Agriculture

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

Chemical soil contamination can be caused by a number of human activities, such as industrial activities, mining, and agriculture. Natural weathering is not a potential source of chemical soil contamination.

Multiple choice

Which of the following is not a factor that influences soil formation?

  1. Climate

  2. Vegetation

  3. Parent material

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

Vegetation is not a factor that influences soil formation. It is a result of soil formation.