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 factors primarily influences the soil temperature in India?

  1. Latitude

  2. Altitude

  3. Soil Moisture

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

Latitude is the primary factor influencing soil temperature in India. Areas closer to the equator experience higher soil temperatures due to the direct solar radiation they receive.

Multiple choice

Which soil type generally has a higher temperature compared to others?

  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 higher temperature compared to other soil types because it has a lower water-holding capacity and allows for better heat penetration.

Multiple choice

Which of the following is NOT a factor that can influence soil temperature?

  1. Soil Color

  2. Soil Moisture

  3. Soil Texture

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

Soil color does not directly influence soil temperature. Soil moisture, soil texture, and soil structure are all factors that can affect soil temperature.

Multiple choice

In general, how does soil temperature vary with latitude?

  1. Increases with Latitude

  2. Decreases with Latitude

  3. Remains Constant with Latitude

  4. Varies Irregularly with Latitude
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Soil temperature generally decreases with increasing latitude. This is because areas closer to the equator receive more direct solar radiation and have higher temperatures.

Multiple choice

What is the predominant soil type found in the desert climate zone of India?

  1. Sandy soil

  2. Clayey soil

  3. Loamy soil

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

Sandy soil is the predominant soil type found in the desert climate zone of India due to the weathering of rocks and the lack of vegetation.

Multiple choice

Which soil property can be effectively estimated using visible and near-infrared (VNIR) remote sensing data?

  1. Soil Moisture

  2. Soil Texture

  3. Soil Organic Matter Content

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

Visible and near-infrared (VNIR) remote sensing data can be used to estimate soil organic matter content due to the strong absorption of VNIR radiation by organic matter.

Multiple choice

What is the main type of soil found on the Deccan Plateau?

  1. Black soil

  2. Red soil

  3. Laterite soil

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

Black soil is the main type of soil found on the Deccan Plateau. This soil is known for its fertility and is used for growing a variety of crops, including cotton, sugarcane, and rice.

Multiple choice

Which of the following is NOT a characteristic of wetland soils?

  1. High organic matter content

  2. Poor drainage

  3. High oxygen content

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

Wetland soils are typically characterized by high organic matter content, poor drainage, and anaerobic conditions due to the lack of oxygen in the soil.

Multiple choice

Which of the following is the most common soil type in India?

  1. Black soil

  2. Red soil

  3. Laterite soil

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

Alluvial soil is the most common soil type in India, covering about 40% of the total land area. It is found in the river basins and deltas of major rivers like the Ganga, Brahmaputra, and Indus.

Multiple choice

What is the characteristic color of black soil?

  1. Black

  2. Red

  3. Brown

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

Black soil, also known as regur soil, is characterized by its black color. This color is due to the presence of high organic matter content and iron oxides.

Multiple choice

What is the primary factor responsible for the formation of laterite soil?

  1. High rainfall

  2. Low temperature

  3. Alkaline conditions

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

Laterite soil is formed under conditions of high rainfall and acidic leaching. The acidic conditions promote the removal of silica and other soluble elements, leaving behind a soil rich in iron and aluminum oxides.

Multiple choice

Which soil type is known for its high fertility and is suitable for growing a variety of crops?

  1. Arid soil

  2. Desert soil

  3. Alluvial soil

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

Alluvial soil is known for its high fertility due to its rich nutrient content and good drainage. It is suitable for growing a wide range of crops, including rice, wheat, sugarcane, and vegetables.

Multiple choice

What is the dominant soil type in the Thar Desert region of India?

  1. Black soil

  2. Red soil

  3. Desert soil

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

Desert soil is the dominant soil type in the Thar Desert region of India. It is characterized by low organic matter content, poor fertility, and a high concentration of salts.

Multiple choice

Which soil type is commonly found in the mountainous regions of India?

  1. Black soil

  2. Red soil

  3. Mountain soil

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

Mountain soil is commonly found in the mountainous regions of India. It is characterized by a shallow depth, poor fertility, and a high content of rock fragments.

Multiple choice

What is the primary factor responsible for the formation of arid soil?

  1. High rainfall

  2. Low temperature

  3. High evaporation

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

Arid soil is formed in regions with low rainfall and high evaporation. The high evaporation rate leads to the accumulation of salts and minerals in the soil, resulting in poor fertility.