Environmental Studies · 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 evs soil- our life horizons of soil soil - formation and profile soil-nature

.......... soil holds plenty of air.

  1. Sandy

  2. Clayey

  3. Silt

  4. Both B and C
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sandy soil has large-sized particles. These particles are loosely bound to each other. Apart from this, they also have large interparticle spaces between them. A lot of air can be trapped in this space. Same is the case with silt. Its particles are water holding capacity is more.

Clay has very small particles with great water holding capacity.
So, option A "Sandy" is the correct option.

Multiple choice evs soil- our life horizons of soil soil - formation and profile soil-nature

In the soil profile, which layer is harder and more compact?

  1. Bedrock

  2. Subsoil

  3. Surface soil

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

Bedrock is the lowermost layer of soil. It lies beneath the soil layers. It is hard and made of rocks. Its constituents are tightly bound to each other. 

The subsoil is formed by the horizon B. Layer C forms the parent material.
Surface soil is the upper layer of soil that withers away easily under the effect of water, air etc causing soil erosion.
So, option A " Bedrock" is the correct answer.

Multiple choice evs soil- our life horizons of soil soil - formation and profile soil-nature

........... is the collective name for layers of soil.

  1. A-horizon

  2. B-horizon

  3. C-horizon

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

Soil is arranged in various layers. These layers collectively form the entire structure of the soil. This is called a soil profile. The soil profile is made up of different layers, called horizons. A soil horizon is a layer of soil that runs parallel to the soil surface. Each of the layer has different and specific characteristics that are different from the other layers.

So, option D " Soil Profile" is the correct answer. 

Multiple choice evs soil- our life horizons of soil soil - formation and profile soil-nature

Soil building begins with the physical fragmentation of

  1. Lichens

  2. Humus

  3. Aggregate

  4. Parent material
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The development of a soil would begin with the weathering of lava flow bedrock, which would produce the purely mineral-based parent material from which the soil texture forms. Soil development would proceed most rapidly from bare rock of recent flows in a warm climate, under heavy and frequent rainfall. This The mineral material from which a soil forms is called parent material. Rock, whether its origin is igneous, sedimentary, or metamorphic, is the source of all soil mineral materials and the origin of all plant nutrients with the exceptions of nitrogen, hydrogen and carbon. As the parent material is chemically and physically weathered, transported, deposited and precipitated, it is transformed into a soil.
So, the correct answer is 'Parent material'.
Multiple choice evs soil- our life horizons of soil soil - formation and profile soil-nature

The study of the vertical section of the layers of the soil is known as 

  1. Soil study

  2. Soil profile

  3. Soil layering

  4. Soil weathering
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A soil profile consists of multiple horizontal layers of soil called horizons. Horizons occur parallel to each other. Each horizon is distinct from the other with respect to age, texture, color etc, these horizons can be observed when the soil layers are dug through vertically
So, the correct answer is 'Soil profile'
Multiple choice evs soil- our life horizons of soil soil - formation and profile soil-nature

The layer of humus in the soil profile is observed at

  1. The lowermost layer of the soil

  2. The topmost layer of the soil

  3. The soil layer beneath the clay

  4. The soil layer above the sand
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Humus is formed from decaying organic matter (leaves, twigs, etc.) that accumulates on the surface of the ground.

Multiple choice geography kerala: the land, the rain, and the people the land of kerala environment- centric mass movements in the land of kerala

The coastal tract of Ernakulam, Thrissur and Kannur districts have _____ type of soils.

  1. Acid saline

  2. Coastal alluvium

  3. Red soils

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

The coastal regions of these districts in Kerala are characterized by acid saline soils, often referred to as 'kari' soils in some local contexts.

Multiple choice geography kerala: the land, the rain, and the people the land of kerala environment- centric mass movements in the land of kerala

Which type of soils are found in the plains of chittur taluk in palakkad district?

  1. Mixed alluvium soil

  2. Black cotton soil

  3. Red soil

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

The Chittur taluk in Palakkad district is unique in Kerala for having black cotton soil, which is highly fertile and suitable for specific crops.