Agriculture - Mock Test 50

Question 491

Which one of the following is not a soil forming factor?

A) Climate B) Organisms C) Relief D) Moisture

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Question 492

Which one of the following minerals is least weatherable in soil?

A) Olivine B) Quartz C) Calcite D) Biotite

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Question 493

The amount of work dong by the water during its movement from Initial point to reference point is known as?

A) Soil water potential B) Solute water potential C) Matric potential D) Pressure potential

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Question 494

The amount of P in soil and soil solution that can exchange with orthophosphate in addition to soil as measured by plant growth in soil system is termed as?

A) A-value B) L-value C) E-value D) None of these

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Question 495

The amount of N2 fixed by clostridium is ______ mg N2 per gm sugar?

A) 15 - 25 B) 7 ? 12 C) 2 ? 7 D) 25 - 50

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Question 496

The alkali soil can be identified by seeing?

A) White layer of salts on the surface B) Black colour on the surface C) Red colour on the surface D) None of the above

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Question 497

The adverse effect of poor quality water is/will be more on?

A) Clay soil B) Loamy soil C) Sandy soil D) None of the above

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Question 498

The addition of excess soluble phosphate fertilizers to soils may affect plant growth by?

A) Inhibiting the growth of micro-organism B) Reducing Fe and Al C) Reducing the availability of Zn D) Reducing the availability of Ca

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Question 499

The acidity of H+ in aqueous phase of soils is called?

A) Reserve acidity B) Active acidity C) Permanent charge D) None of these

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Question 500

The acidity of H+ absorbed on solid phase is known as?

A) Reserve acidity B) Active acidity C) Both of the above D) None of these

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