NCERT Class 8 Geography — Chapter 1: Land, Soil, Water, Natural Vegetation and Wildlife Resources

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In the process of soil formation, the factor of 'Relief' primarily determines:

Official previous-year question

Verified 1 Aug 2026.

Options

ASoil thickness
BColour & texture
CWeathering rate
DAltitude, slope & accumulation

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Solution

Correct Option

The correct option is

Altitude, slope & accumulation

Explanation

Soil formation (pedogenesis) is governed by five major factors: Parent Material, Topography (Relief), Climate, Biological Activity, and Time. Each factor plays a distinct role in determining the physical and chemical properties of the soil.

Detailed Analysis

Relief (Topography): This factor encompasses altitude and slope. It primarily influences the accumulation of soil.
- Slope: On steep slopes, gravity and water runoff cause rapid erosion, preventing soil material from settling. Consequently, soils in these areas are thin and poorly developed. Conversely, in flat areas or valleys, deposition occurs, leading to the accumulation of thick, deep soil layers.
- Altitude: It affects temperature and precipitation patterns, indirectly influencing vegetation and weathering, but the direct physical impact of relief is on the retention and accumulation of soil material.
Parent Material: This determines the basic chemical composition, colour, and texture of the soil .
Climate: This is the most active factor, primarily determining the rate of weathering and humus formation through temperature and precipitation .
Time: While relief affects thickness through accumulation, Time is the specific factor that determines the maturity and full development of the soil profile.

Key Takeaway: Relief (Topography) regulates soil formation by determining the altitude, slope, and accumulation of soil materials; steep slopes hinder accumulation, while flat lands favour it.

Your note

More from Chapter 1: Land, Soil, Water, Natural Vegetation and Wildlife Resources

Consider the following statements regarding the distribution of population and land resources: 1. Ninety per cent of the world’s population occupies only thirty per cent of the land area. 2. Areas with steep slopes and rugged topography are generally densely populated. 3. Plains and river valleys are densely populated due to suitability for agriculture. Which of the statements given above is/are correct?

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Which of the following factors are considered "Physical Factors" determining land use? 1. Topography 2. Population 3. Soil 4. Technology 5. Minerals Select the correct answer using the code given below:

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With reference to 'Common Property Resources', consider the following statements: 1. Common Property Resources refer exclusively to land owned by private individuals. 2. Community lands are also known as Common Property Resources. 3. Encroachment on these lands is observed primarily to expand agricultural land in urban areas. Which of the statements given above is/are correct?

hard

Which of the following are cited as major threats to the environment resulting from the expansion of agriculture and construction activities? 1. Land degradation 2. Landslides 3. Soil erosion 4. Desertification Select the correct answer using the code given below:

medium

Consider the following methods for the conservation of land resources: 1. Deforestation 2. Land reclamation 3. Regulated use of chemical pesticides 4. Checks on overgrazing Which of the methods given above are to check land degradation?

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Correct Option

The correct option is

Altitude, slope & accumulation

Explanation

Detailed Analysis

Relief (Topography): This factor encompasses altitude and slope. It primarily influences the accumulation of soil.
- Slope: On steep slopes, gravity and water runoff cause rapid erosion, preventing soil material from settling. Consequently, soils in these areas are thin and poorly developed. Conversely, in flat areas or valleys, deposition occurs, leading to the accumulation of thick, deep soil layers.
- Altitude: It affects temperature and precipitation patterns, indirectly influencing vegetation and weathering, but the direct physical impact of relief is on the retention and accumulation of soil material.
Parent Material: This determines the basic chemical composition, colour, and texture of the soil .
Climate: This is the most active factor, primarily determining the rate of weathering and humus formation through temperature and precipitation .
Time: While relief affects thickness through accumulation, Time is the specific factor that determines the maturity and full development of the soil profile.