Environmental Science and Ecology - Mock Test 43

Question 421

The factors to control of wind erosion are?

A) The soil should be kept moist as far as possible especially in the season of windstorms. Moist soil is less vulnerable to wind erosion than dry soil B) Wind breaks by planting tree in rows or shelter belts of any means are effective in wind erosion C) Both a & b D) None of these

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Question 422

The major types of wind erosion are?

A) Siltation B) Soil creep C) Suspension D) All of the above

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Question 423

The major types of water erosion are?

A) Splash B) Sheet C) Rill D) None of these

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Question 424

Soil erosion factors include?

A) Amount of rainfall B) Slope length C) Slope gradient D) All of the above

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Question 425

Causes of accelerated erosion are?

A) Removal of the natural vegetation cover B) Cultivation of land by crops which expose the soil to direct rain impact and runoff water C) Both a & b D) None of these

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Question 426

Accelerated soil erosion factors are?

A) Soil erosion by water B) Soil erosion by wind C) Both a & b D) None of these

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Question 427

The major types of soil erosion are?

A) Normal or geological B) Accelerated C) Both a & b D) None of these

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Question 428

The soil moisture constants are?

A) Hygroscopic co-efficient B) Water holding capacity C) Field Capacity D) All of the above

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Question 429

Soil water depicts?

A) Gravitational B) Capillary C) Hygroscopic D) All of the above

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Question 430

The Organic contents of soil are?

A) Humus B) Mull C) Peat and Much D) All of the above

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