Agriculture - Mock Test 49

Question 481

The bacteria considered most important to bring about the conversion of NH4 to NH2?

A) Nitrosomonas B) Nitrobacteria C) Both a & b D) Azotobacter

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Question 482

The average soil bulk density of cultivated loamy soil is approximately?

A) 0.5 - 1.0 gm cm-3 B) 1.5 - 1.65 cm-3 C) 1.1 - 1.4 gm cm-3 D) None of the above

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Question 483

The average chemical composition of NPK of night soil is?

A) 3.7 - 4.0 - 2.0 B) 0.5 - 0.6 - 0.5 C) 2.0 - 2.6 - 0.5 D) 5.5 - 4.0 - 2.0

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Question 484

The average arable surface soil may be considered to have a particle density of about?

A) 2.70 gms/cc B) 2.45 gms/cc C) 1.64 gms/cc D) 2.66 gms/cc

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Question 485

The available water present in soil for better plant growth in between?

A) Field capacity and wilting percentage B) Witting percentage and hygroscopic coefficient C) Field capacity and Air dry soil D) None of the above

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Question 486

The availability of phosphorous is optimum in the pH range of?

A) <7 B) >7-8 C) 8 D) 6 ? 8

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Question 487

The availability of phosphoreus is maximums at soil pH?

A) 5.5-7.5 B) 7.0-8.0 C) 6.0-8.0 D) None of the above

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Question 488

Which one of the following fertilizers is least hygroscopic?

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

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Question 489

Which one of the following irrigation methods is best suited for an undulating topography?

A) Flow irrigation B) Check basin method C) Sprinkler irrigation D) Furrow irrigation

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Question 490

Which one of the following is not a component of the moisture potential in soils?

A) Matric potential B) Turgor potential C) Gravity potential D) Osmotic potential

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