Agriculture - Mock Test 41

Question 401

The natural soil aggregates are called as?

A) Concretion B) Mottling C) Peds D) Soil separates

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Question 402

The N2 fertilizer of choice for tea is?

A) CAN B) Urea C) (NH4)2SO4 D) NH4NO3

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Question 403

The N2 fixation in the roots of Alfalfa _______ kg N2/ha/year?

A) 100 - 150 B) 125 - 300 C) 50 - 76 D) None of these

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Question 404

The N2 fixation in soyabean may be upto ______ kg N2/ha/year?

A) 100 - 175 B) 60 - 100 C) 65 - 115 D) 40 - 90

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Question 405

The N2 fixation in pea may be upto _______ kg N2/ha/year?

A) 80 - 150 B) 90 - 110 C) 15 - 75 D) 50 - 100

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Question 406

The H2 fixation by Rhizohium species in legume is called ?

A) Symbiotic N2 fixation B) Non-symbiotic N2 fixation C) Both of these D) None of these

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Question 407

The N2 fixation by Azotobacter and Acospirillum in the cereals is called?

A) Symbiotic N2 fixation B) Non-symbiotic N2 fixation C) Both of these D) None of these

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Question 408

Which of the following soil texture is lighter than others?

A) Silty clay loam B) Clay loam C) Sandy loam D) Loamy sand

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Question 409

The most important silicte clays are known as?

A) Photosilicates B) Phyllosilicates C) Autosilicates D) Simply silicates

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Question 410

The most abundant mineral present in the earth's crust is?

A) Quartz B) Felspar C) Mica D) Hornblende

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