Agriculture - Mock Test 47

Question 461

Which of the following statements is more correct as regards to "luxury consumption" of K found in minute?

A) Maize has mechanism to increase yields by taking excess K above the optimum requirement B) Maize takes excess K above the optimum requirement even though growth and yield are not promoted C) Maize takes excess K above the optimum requirement the concentration which becomes toxic to plants D) None of the above

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Question 462

The conditions responsible for the formation of salt affected soil is?

A) High rainfall B) Low rainfall and high evaporation C) Irrigation with good qality water D) All of the above

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Question 463

The concept of soil as a natural body was first developed by?

A) C F Marbut B) K D Gilinka C) V V Dakuchaev D) E W Hilligard

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Question 464

Gypsum is also called as?

A) Kyarite B) Dolomite C) Salenite D) Baryte

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Question 465

The concentration of CO2 in the soil increases after the rains, probably because of?

A) Increase nitrification and decomposition of organic matter B) Increases denitrification C) Increases leaching of nitrogen of CO2 D) None of the above

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Question 466

The colloidal surface area in the upper 15 cm of a hectare of a clay soil could be as high as km?

A) 700 B) 7,000 C) 70000 D) 700000

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Question 467

The choice of a chemical amendment may be influenced by the _______ required for reaction in the soil?

A) Time B) Cost C) Quantity D) Quality

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Question 468

The characteristics of surface soil, which have important, bearing in soil management and crop production, is known as?

A) Soil type B) Soil variant C) Soil series D) Soil phase

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Question 469

The cellulose content in humus is about?

A) 10% B) 4% C) 15% D) 21%

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Question 470

The CEC of kaolinite clay varies between?

A) 3 and 15 B) 16 and 40 C) 41 and 80 D) 81 and 100

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