Agriculture MCQs with Answers – Practice Online – Page 40

Question 781 Soil Science

How can water erosion be reduced or controlled?

Correct answer C. Both A and B

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Question 782 Water Management

When seepage water passes through a groundwater aquifer and then joins a surface stream, what is the stream called?

Correct answer C. Effluent stream

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Question 783 Water Management

Who represented the infiltration capacity curve, showing how infiltration capacity changes with time after rainfall begins?

Correct answer D. Horton

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Question 784 Soil Science

On what date is the International Day for Biological Diversity observed?

Correct answer B. 22 May

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Question 785 Soil Science

Pakistan is mainly arid and semi-arid. Besides losses in farm output and rising poverty, what significant effects does desertification cause?

Correct answer D. All of these

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Question 786 Water Management

Field capacity is water held by a saturated soil after free drainage. What is the water retained by a saturated soil after centrifuging at 1000 times gravity called?

Correct answer B. Equivalent moisture

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Question 787 Water Management

After rainfall, what is the water called that flows directly over the ground and immediately joins the river?

Correct answer D. True surface runoff

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Question 788 Soil Science

In low-rainfall areas, large shifting sand dunes often occur near settlements, and afforestation techniques are needed to stabilise them. Which techniques are used?

Correct answer B. Both a & b

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Question 789 Soil Science

What is the practice of growing annual crops in alleys between rows of closely planted woody hedges called?

Correct answer C. Hedgerows intercropping

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Question 790 Water Management

Hydrology deals with the yearly depletion and recharge of water resources, so knowledge of it is essential to do what properly?

Correct answer C. Manage

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Question 791 Soil Science

What are soils rich in both soluble salts and exchangeable sodium called?

Correct answer A. Saline-alkali soil

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Question 792 Water Management

What is a curve made of two or more arcs of different radii bending in the same direction with a common tangent called?

Correct answer B. Compound curve

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Question 793 Soil Science

Which species is considered most suitable for reclaiming sandy soils?

Correct answer A. Azadirachta indica

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Question 794 Water Management

What is the point at which a body balances when it is supported called?

Correct answer B. Centre of gravity

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Question 795 Soil Science

What is the practice of growing erosion-permitting and erosion-resisting crops in alternate strips across the slope of the land called?

Correct answer B. Strip planting

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Question 796 Water Management

What is a graph showing the storage volume of a reservoir or tank at any given water level called?

Correct answer D. Capacity curve

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Question 797 Soil Science

Which species is suitable for reclaiming saline and sodic soils?

Correct answer A. Casuarina equisetifolia

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Question 798 Water Management

Roughly how much rainfall does the Indus plain, Pakistan’s main agricultural region, receive annually?

Correct answer C. 150 mm

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Question 799 Soil Science

Organic soils are classified as which soil order, and what are they also known as?

Correct answer A. Histosols, peat & muck

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Question 800 Water Management

What is the flow present in drains outside the rainy season, such as sanitary sewage, called?

Correct answer D. Dry weather flow

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