Agriculture MCQs with Answers – Practice Online – Page 33

Question 641 Water Management

What is the percentage of the culturable commanded area irrigated during the year, relative to the total culturable commanded area of an outlet or channel, called?

Correct answer C. Annual Intensity

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Question 642 Soil Science

What is the effect of applying P2O5 fertiliser to a leguminous green manure crop on phosphorus availability for the following crop?

Correct answer D. It does not affect the availability of phosphorous to succeeding crop

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Question 643 Water Management

Hydraulic structures are designed to pass floods safely. What is the flood of design magnitude expected during the project’s life called?

Correct answer D. Probable flood

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Question 644 Soil Science

What is the removal of excess water from the ground surface called?

Correct answer C. Surface operations

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Question 645 Water Management

What is the flood that could occur in a basin under the worst possible meteorological and hydrological conditions called?

Correct answer D. Maximum probable flood

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Question 646 Soil Science

Which element is probably the most important growth-limiting factor in acid soils, especially those below pH 5.0-5.5?

Correct answer D. Aluminium

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Question 647 Water Management

What is a river called that is depositing sediment and building up dunes in its bed?

Correct answer A. Aggrading river

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Question 648 Soil Science

Of the twelve soil orders found in the world, six have been recognised at various locations. Which six are they?

Correct answer B. Entisols, Inceptisols, Aridisols, Alfisols, Mollisols, Vertisols

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Question 649 Water Management

What is a river called that splits into small channels forming a triangular shape before it enters the sea?

Correct answer D. Deltaic river

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Question 650 Soil Science

Which soil order contains swelling clay soils that develop cracks because of a high proportion of expanding clays?

Correct answer C. Vertisols

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Question 651 Water Management

What is a river called whose flood water dries up before it reaches the sea or another river?

Correct answer C. Virgin

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Question 652 Water Management

When the sloping face of a river bank is protected by stone pitching against scour, what is the pitching extended beyond the toe towards the river called?

Correct answer C. Launching apron

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Question 653 Soil Science

Which soil particles range in diameter from 0.02 mm to 0.002 mm?

Correct answer A. Silt

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Question 654 Water Management

What is a groyne that points upstream, against the direction of flow, called?

Correct answer B. Repelling

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Question 655 Soil Science

Into how many textural classes are soils divided based on their percentage of sand, silt and clay?

Correct answer B. 12

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Question 656 Water Management

If a weir floor is built as a continuous reinforced structure with the divide piers, so that their weight keeps it safe against uplift, what is it called?

Correct answer B. Non-gravity weir

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Question 657 Soil Science

Into which classes are soil pores divided according to their diameter?

Correct answer C. Both A & B

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Question 658 Water Management

What is the rise in river water level upstream caused by building a weir called?

Correct answer B. Afflux

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Question 659 Water Management

Through which structures should silt-free water be supplied to canals?

Correct answer D. Head sluices

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Question 660 Soil Science

Water is the main constituent of living organisms. What percentage of plant biomass is water?

Correct answer C. 85-95%

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