soil science MCQs – Page 18

Practise focused soil science questions with marked answers for exam preparation and subject revision.

soil science Mcqs
341. Histols are found in______________________?
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A. Pakistan

B. Canada

C. Alaska

D. Both b & c
342. DAP fertilizer available in Pakistan contains__________________________?
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A. 100%P2O3

B. 46%N & 18%P2O3

C. 18% N & 46% P2O5

D. 50%P2O3

343. The chemical formula for Ammonium acctatc is_____________________?
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A. NH3OAC

B. NH4OAC

C. NH4AOC

D. Both b & c

344. Mean annual precipitation for tundra region is ____________________?
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A. None of the above

B. 150-70 cm

C. 0-50 cm

D. 70-80 cm

345. An expression of the intensity of the basic or a acidic condition of a liquid or of soil is called_____________________?
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A. ESR

B. pH

C. EC

D. SAR

346. TSP contains____________________?
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A. 46%P

B. 14%

C. 40%P

D. 50%P

347. Boron concentration is irrigation water is considered safe only upto_________________?
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A. 0.7 ppm

B. 2 ppm

C. 3 ppm

D. 1.5 ppm

348. Mollic refers to____________________?
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A. C-horizon

B. U-horizon

C. Surface horizon

D. B-horizon

349. Permanent change in soil is due to__________________?
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A. pH change

B. Covalent bonding

C. Isomorphic substitution

D. Ionic bonding

350. The aggregation of individual particles is called___________________?
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A. Granulation

B. Texture

C. Flocculation

D. Structure

351. Radiation can be detected by the blankening of photographic film or by using___________________?
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A. Ratio autoanalyser

B. GM counter

C. Neutron probe

D. Dosimeter

352. C12H12N-NaO8S2 is the chemical formula of ____________________?
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A. Carbonated sodium sulphate

B. Azomethine H

C. Activated charcoal

D. None of the above

353. Rocks which are formed by disintegration of pre-existing rocks by weathering are____________________?
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A. Greis

B. Sand stone

C. Classics

D. Igneous

354. The water loss through transpiration from vegetative and evaporation from soil surface is known as__________________?
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A. Evaporation

B. Evaptranspiration

C. Guttation

D. Transpiration

355. Soil particles having diameter greater than 2 mm are called___________________?
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A. Gravel

B. Silt

C. Clay

D. Sand

356. The time for which water and ion remains in vicinity is called_____________________?
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A. Residence time

B. ppm

C. Primary hydration

D. Normality

357. The moisture content below which a cohesive soil does stick to metal tools is known as______________________?
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A. Alter berg limit

B. Liquid limit

C. Plastic limit

D. Sticky limit
358. Igneous rock whose crystal is 1 cm called____________________?
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A. Felsic

B. Mafic

C. Pegmatitic

D. Plutonic

359. The deficient level of N (%) in plants suggested by various workers is____________________?
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A. 0%

B. 5%

C. 3%

D. 10%

360. Rocks formed from compacted clay or mud are called____________________?
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A. Clay stone

B. Sand stone

C. None of the above

D. Shale