Agriculture - Mock Test 55

Question 541

Which one of the following oil cakes, in addition to its manurial value, acts also as a nitrification inhibitor?

A) Mustard B) Groundnut C) Neem D) Til

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Question 542

Saline soils are reclaimed/managed by?

A) Addition of gypsum B) Addition of lime C) Leaching the soluble salts D) Addition of pyrite

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Question 543

S.M.P. buffer is used in determination of?

A) Lime B) Potassium C) Nitrogen D) Calcium

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Question 544

Rock phosphate contains?

A) 20 to 22% P2O5 B) 16 to 18% P2O5 C) 12 to 16% P2O5 D) 10 to 40% P2O5

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Question 545

Rock phosphate can be directly applied as fertilizer in soils?

A) Acidic B) Alkaline C) Neutral D) All of these

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Question 546

Rhizospheres affect microbial population and nutrient availability by?

A) Exerting physical pressure B) Secreting nutritive metabolites and organic solvents C) Increasing pore space D) Changing soil structure

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Question 547

Rhizosphere refers to the small area?

A) Around the root B) On the root C) Near the primary root D) All of the above

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Question 548

Rhizobium trifolii can fix the nitrogen in the roots of?

A) Sweet clover B) Clover C) Lupines D) Soyabean

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Question 549

Rhizobium sp fix atmospheric nitrogen?

A) As symbiouts on whet B) As symbiouts on cucumber C) As symbiouts on pulses D) In free soil

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Question 550

Rhizobium phaseoli can fix the nitrogen in the roots of?

A) Lentil B) Soyabean C) Pea D) Bean

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