Tag: soil and crops

Questions Related to soil and crops

North eastern states are mostly covered with these soils.

geography abiotic resources: land, soil and water soil profile soil- our life soil and crops

  1. Red and yellow soils

  2. Alluvial soils

  3. Forest and mountainous soils

  4. Laterite soils

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Correct Option: A

Water holding capacity of the soil depends upon 

evs soil- our life soil profile soil and crops soil - types, uses and need for conservation

  1. Chemical composition of soil

  2. Particle size of soil

  3. Aggregation of soil particle

  4. All of these

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Correct Option: D
Explanation:

The quantity of water soil can retain after flowing down of the gravitational water is called its filled capacity or water holding capacity. Its depends on chemical composition of the sol which means types of ions present and hence pH of the soil . Size of sol particles and their aggregation form pores in soil. Large pores take part in percolation of water in the soil but small pores hold water by capillarity. 

So, the correct answer is 'All of the above'.

Which of the following are the substances that are present in the soil and required for the growth of crops?

evs soil : our life soil profile soil- our life soil and crops

  1. Manures

  2. Pesticides

  3. Fertilisers

  4. Nutrients

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Correct Option: D
Explanation:

We know that the growth of plants in the soil requires the presence of certain substances in it. This includes water and also nutrients present inside the soil.

Manures, as we know are prepared naturally by the process of decomposition of plant and animal bodies in the soi. They are not present in the soil but have to be prepared by composting and then added to the crop soil.
Pesticides are chemical substances that sprayed on the crop plants artificially to protect them from insect pests.
Fertilizers are also chemically prepared substances added to the soil to improves its nutritive value.
So, option D "Nutrients' is the correct answer.





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Which of the following crop is not grown in clayey soil?

evs soil : our life soil profile soil- our life soil and crops

  1. Wheat

  2. Gram

  3. Paddy

  4. Cotton

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Correct Option: D
Explanation:

Cotton crops are best grown in black soil. It is also known as black cotton soil. Black soil contains a very high proportion of calcium and magnesium and so cotton plants can obtain their necessary requirements. 

Lettuce and other plants with short roots can grow in clayey soil.
So, option D "Çotton" is the correct answer.

Fungi and bacteria grow mostly in

evs soil : our life soil profile soil- our life soil and crops

  1. Subsoil

  2. Top soil

  3. Bedrock

  4. All of the above

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Correct Option: B
Explanation:

Fungi and Bacteria grow mostly in top soil. As Fungi is a saprophyte it feeds,on decay and some bacteria decomposes the fallen leaves into manures.

So, the correct answer is 'top soil'

An area of soil is thoroughly wefted and allowed to drain until capillary movement of water stopped. The water contents of the soil will give an estimate of its

evs soil- our life soil profile soil and crops soil - types, uses and need for conservation

  1. Capillary water

  2. Storage water

  3. Field capacity

  4. Gravitational water

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Correct Option: C
Explanation:

(c) The amount of water retained by a unit weight of undisturbed soil after complete drainage under controlled coniditions is called field capacity or holard.

Loamy soil is best suited for the growth of 

evs soil : our life soil profile soil- our life soil and crops

  1. Mangroves

  2. Lentils

  3. Pulses

  4. Both B and C

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Correct Option: D

The quality of the soil is affected by which of the following factors?

evs soil : our life soil profile soil- our life soil and crops

  1. Dryness, water and low temperature

  2. Wind, rainfall and light

  3. Light, temperature and humidity

  4. Both B and C

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Correct Option: D

The soil which is preferred for the growth of the paddy crops is 

evs soil : our life soil profile soil- our life soil and crops

  1. Clayey soil

  2. Loamy soil

  3. Sandy soil

  4. Both B and C

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Correct Option: A

Consider the following fungi:
1. Arthrobotrys oligospora
2. Dactylella cionopaga
3. Streptorrryces rimosus
Which of these are predaceous for the biological control of nematodes in soil?

evs soil- our life soil profile soil and crops soil - types, uses and need for conservation

  1. 1 and 2

  2. 1 and 3

  3. 2 and 3

  4. 1, 2 and 3

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Correct Option: A