SOIL SCIENCE MCQs

1. Generally speaking, only level to nearly level (0-2 % slope) & gently sloping lands (2-5 % slope) should be:

A. Brought under range crops

B. Forests

C. Both A. and B.

D. None of these

2. Calcium is immobile in plants. Therefore, under conditions of deficiency, young tissue is affected first. calcium deficiency symptoms are:

A. Death of terminal buds; roots tips also affected

B. Abnormal dark green appearance of foliage

C. Premature shedding of blossoms & buds & weakened stem

D. All of the above

3. Potassium plays a significant role in the transport of water & nutrients through the plant in the xylem. When the supply of K is reduced, the transportation of ___________________ is depressed:

A. Nitrates, Phosphates

B. Calcium, magnesium

C. Amino acids

D. All of the above

4. The solid wastes generated in Pakistan are about: ___________?

A. 47,920 tonnes/day

B. 65, 772 tonnes/day

C. 12250 tonnes/day

D. All of the above

5. Almost one third of the land area through out the world is affected by land degradation. Pakistan’s agriculture sector though facilitates employment to >65% but is facing challenges from:

A. Erosion

B. Salinity

C. Waterlogging

D. All of the above

6. Term forest is derived from: ___________?

A. English word

B. French word

C. Latin word

D. None of these 

7. Vegetation found in saline soils is termed by _________?

A. Halophyte

B. Hetrophyics

C. Viticphyics

D. Hortiphyics

8. Plants which grow on sandy soils:_________?

A. Chasmophytes

B. Lithophytes

C. Psammophytes

D. None of these

9. Which nutrients are immobile in plants?

A. Ca only

B. B only

C. P only

D. Both A. and C.

10. The highest Cation Exchange Capacity is in:_________?

A. Sandy Soil

B. Clay soil 

C. Gravely soil

D. None of these

11. Fossils are found in which type of rock:

A. Sedimentary rock

B. Metamorphic rock

C. Stratified rock

D. Both A. and C.

12. A and B horizon is called as:________?

A. Regolith

B. Poly-pedon

C. Series

D. None of these

13. Availability of Phosphorus is maximum at:__________?

A. Neutral

B. Alkaline

C. Acidic

D. None of these

14. Flow of nitrogen in soil due to:_________?

A. Diffusion

B. Interception

C. Mass flow

D. None of these

15. Field Capacity is a point at which?

A. All the macro & micropores in the soil are filled with water

B. All the macropores filled with water & the micropores filled with air

C. All the macropores filled with air & the micropores filled with water 

D. None of these

16. Which of the following nutrient play the most effective role in controlling rate of transpiration:

A. Potassium

B. Zinc

C. Phosphorus

D. Mg

17. Which is the correct sequence of soil erosion by water:

A. Rill-Sheet-Gully

B. Gully-Sheet-Rill

C. Sheet-Rill-Gully

D. None of these

18. The clay fraction of the soil contains particles less than 0.002 mm. Particles <0.001 mm size:

A. Soil Silt

B. Soil colloids

C. Soil loam

D. Soil sand

19. Soil order Vertisol is related to:_________?

A. Black soils

B. River soils

C. Marine deposits

D. Both B. and C.

20. Which type of structure is dominant in grasslands:

A. Prismatic or Columnar

B. Spheroidal or Sphere-like

C. Angular blocky Sub-angular blocky

D. Platy or Luminar