Agriculture - Mock Test 46

Question 451

The maximum phosphorus availability in most of the soils in the pH range?

A) 4.0 - 4.5 B) 6.0 - 6.5 C) 7.0 - 7.5 D) None of these

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Question 452

The maximum moisture is available to plants at ?

A) Field capacity B) Wilting point C) Hygroscopic coefficient D) Saturation

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Question 453

The maximum moisture is available to plants at?

A) Field capacity B) Wilting point C) Hygroscopic coefficient D) Saturation

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Question 454

The mass per unit volume of the solid mass of the soil excluding pore space is known as?

A) True density B) Bulk density C) Both a & b D) None of the above

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Question 455

The diagnostic surface horizons are called?

A) Epipedon B) Pedon C) Polypedon D) All of them

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Question 456

The dark coloured soils are?

A) High in Fe and Mn B) Medium in Fe and Mn C) Low in Fe and Mn D) Not known

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Question 457

The cuticular membrances are generally more permeable to?

A) Anions rather than cations B) Cations rather than anions C) Cations and anions both D) None of the above

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Question 458

The C-spacing of halloysite is?

A) 10.2 A B) 7.39 A C) 14.0 A D) None of these

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Question 459

The crop suitable for cultivation in saline sodic soil would include?

A) Soyabean and rice B) Soyabean and sugarbeet C) Sugarbeet and rice D) Trice and maixe

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Question 460

The conversion of amount into nitrate by microorganisms is known as?

A) Nitrogen fixation B) Nitrification C) Denitrification D) Loss of nitrogen

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