Agriculture - Mock Test 66

Question 651

In degraded add soils root extension into anaerobic and highly reduced layer is reduced due to injurious concentration of?

A) Calcium B) Iron C) Aluminum D) Magnesium

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Question 652

In chemical weathering the composition of minerals?

A) Changed B) Unaffected C) Remain the same as in original rocks D) None of abov

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Question 653

In CAN, nitrogen is present in following forms?

A) Nitrate form B) Ammonical form C) Both of the above D) None of the above

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Question 654

In acid soils, phosphorous is fixed as?

A) Iron and Aluminum phosphate B) Calcium phosphate C) Fluroapatite D) Hydoxyapatit

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Question 655

In acid soils, availability of Fe is?

A) High B) Low C) Medium D) Not affected

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Question 656

In acid soil rock phosphate should be applied?

A) At the time of sowing B) 5 days before sowing C) 30 days after sowing D) 30 days before sowing

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Question 657

If the particle size is 2mm to 7.5 cm then it is known as?

A) Gravels B) Stones C) Sand D) Silt

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Question 658

If the nitrogen content in crop residues is less than 2% nitrogen, then?

A) Net mineralization may take place B) Net immobilization may take place C) Partial mineraliization may take place D) All of these

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Question 659

If the C:N ratio of crop residues is less than 20 then?

A) Immobilization will take place B) Mineralization will take place C) Both of these D) None of these

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Question 660

If the C: N ratio of crop residues is 20-30 then?

A) Mineralization may not take place B) Immobilization may take place C) Immobilization may not take place D) Both immobilization and mineralization take place

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