Agriculture - Mock Test 67

Question 661

If soyabean is being grown for the first time in a field, the seed should be treated with ______ culture?

A) Azospirillium B) Azotobacter C) Rhizobium D) Phosphor bacterin

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Question 662

While classifying the soil according to textural class in equilateral triangle, suggested by the USDA, % of clay is plotted parallel to?

A) Silt B) Sand C) Clay D) Loan

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Question 663

If crop residues have more than 2% nitrogen, then?

A) Net mineralization will take place B) Net immobilization will take place C) Partial mineralization will take place D) None of these

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Question 664

If a soil has a bulk density of 1.50 mg/m3 and a particle density of 2.65 ms/m3 then the percentage pore spice of the soil will be?

A) 35 B) 38.5 C) 43.4 D) 48.5

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Question 665

Identify which of the following is a passive soil forming factors?

A) Relief B) Biosphere C) Climate D) None of these

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Question 666

Identify which of the following is a passive soil forming fctors?

A) Relief B) Biosphere C) Climate D) None of these

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Question 667

Hygroscopic moisture is held at?

A) 31 atm. B) 1000 atm. C) 99 atm. D) 200 atm.

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Question 668

Hydrogen requirement of plants in met by?

A) Absorption of hydrogen from air B) Absorption of hydrogen from water C) Absorption of hydrogen from soil D) Break-down of water within the plant

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Question 669

Hydraulic conductivity of soils varies directly with?

A) Capillary porosity B) Non-capillary porosity C) Total porosity D) Water holding capacityc

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Question 670

Humus enhances the mineral breakdown and increases the availability of some?

A) Anions B) Cations C) Neutral ions D) None of these

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