Tag: mud and stones

Questions Related to mud and stones

The uniform peeling away of the soil surface by the action of flowing water is called _____________.

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. Slip erosion

  2. Till erosion

  3. Accelerated erosion

  4. Sheet erosion

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Correct Option: A

Which one of the following pairs is NOT correctly matched?

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. Therophytes - Surviving buds lies well above the soil surface

  2. Cryptophytes - Surviving buds lie under soil surface

  3. Hemicryptophyte - Surviving buds lie on the soil surface

  4. Chemiphytes - Surviving buds lie close or above the soil surface

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Correct Option: A

Top soil contains which of the following?

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. Humus and living organisms only.

  2. Humus and soil particles only.

  3. Humus, living organisms and plants.

  4. Humus, living organisms and soil particles.

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Correct Option: D
Explanation:

Top soil is the topmost and outermost layer of the soil, which is usually 2 inches to 8 inches layer. It is generally dark in colour due to humus, i.e., partially decayed organic matter, soil particles and living organisms as soil bacteria etc. 

Choose the correct answer from the alternatives given.
The fertility of soil is reduced by

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. ammonifying bacteria

  2. denitrifying bacteria

  3. nitrifying bacteria

  4. nitrogen fixing bacteria

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Correct Option: B
Explanation:

Decomposers also break down the bodies of dead organisms resulting in nitrogen being returned to the soil as ammonia. In some conditions, denitrifying bacteria in the soil break down nitrates and return nitrogen to the air. This is usually in waterlogged soil. Hence, making it unavailable for plant roots. So, the correct option is 'Denitrifying bacteria'

Formation of plains is an example of

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. Extrinsic

  2. Intrinsic

  3. Both A and B

  4. None

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Correct Option: A
Explanation:

The forces like exogenic and endogenic can create a lot of landforms. Examples include Mountains, Plateaus, and Plains.

So, the correct option is 'Extrinsic'.

Soil contains : 

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. Waste material

  2. Humidity

  3. Rocks

  4. Minerals

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Correct Option: D
Explanation:

Soil contains minerals because they are made up of rocks by the process of weathering.

Models of vegetables are made with this soil :

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. Sandy

  2. Sticky

  3. Rocky

  4. All the above

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Correct Option: A

___________ is a source of all minerals

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. air

  2. water

  3. wildlife

  4. soil

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Correct Option: D

The lower limit of water availability is soil is known as

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. Field capacity

  2. Hypolimnion

  3. Thermocline

  4. Wilting point

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Correct Option: D

Which one is the main source of minerals essential for man and other organisms?

evs mud and stones importance of soil in agriculture soil - formation, profile and properties soil as a natural resource

  1. Lithosphere

  2. Ionosphere

  3. Mesosphere

  4. Stratosphere

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Correct Option: A
Explanation:

The lithosphere serves as a source of minerals. The minerals supply the basic materials, required for making a variety of commodities, which man uses daily. The lithosphere is also the major source of fuels, such as coal, petroleum and a natural gas. 

The lithosphere in combination with the hydrosphere and the atmosphere plays a vital role in the growth of plants and animals. It provides nutrients to the plants. The plants are the source of food for man and all other animals.