soil science MCQs – Page 20

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

soil science Mcqs
381. Most abundant mineral in the earth crust is______________________?
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A. Feldspar

B. N-Feldspar

C. Amplubole

D. S-Feldspar

382. Metamorphic rocks are formed from____________________?
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A. Igneous rocks

B. Sedimentary rocks

C. Both a & b

D. Cleavage

383. Which soil is suitable for nce________________?
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A. None of the above

B. Fine textured

C. Sandy

D. Coarse textured

384. The device used for the measurement of positive pressure potential of soil water is known as_________________?
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A. Tensiometer

B. Piezometer

C. Lysimeter

D. Barometer

385. Which rock contain potash feldspar ?
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A. All the above

B. Gabbro

C. Norile

D. Syeruite
386. When two or more functional groups of single ligand are coordinated to metal cation the complex is termed as___________________?
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A. Solution complex

B. Complex ion

C. All the above

D. Chelate
387. Material deposited by the wind is called____________________?
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A. Regolith

B. Alluvium

C. Eolian

D. Colluvial

388. Rocks formed from molten magma are called__________________?
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A. Igneous rocks

B. Sedimentary rocks

C. Alluvial rocks

D. All the above

389. Salt-tolerant plants are called ____________________?
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A. Halophytes

B. Glycophytes

C. Xerophytes

D. All the above

390. Geochemical weathering processes occurs______________________?
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A. At the level

B. On the mountain

C. On surface

D. Below soil solum
391. Elements essentially required for growth of all plants species are___________________?
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A. 16

B. 32

C. 3

D. 15

392. The exact formula for sodium hexametaphosphate is___________________?
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A. [(NaPO6)13]

B. [(NaPO2)6]

C. [(NaPO3)13]

D. None of the above

393. The little clay mineral is_____________________?
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A. Non-expending

B. None of the above

C. None or little expending

D. Expending

394. The zorawar is brand name of ___________________?
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A. None of the above

B. TSP

C. DAP

D. MAP
395. The most abundant metal in the earths crust and toxic to plants in low concentration is____________________?
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A. Al

B. Fe

C. All the above

D. Mo

396. Addition of sodium hexametaphosphate in soil for determination of soil texture causes__________________?
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A. All the above

B. Agregation of soil particles

C. Dispersion of soil particles

D. Cementing of soil particles

397. The symbol of Na stands for___________________?
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A. Natrium

B. Nickle

C. Neon

D. None of these
398. Which compound decay slowly______________________?
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A. Amino acid

B. Lignin

C. Cellulose

D. fats

399. A treeless artic plain is called as___________________?
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A. Glaciers

B. None of the above

C. Barren land

D. Tundra
400. The reaction of Na2 CO3 salt is____________________?
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A. Alkaline

B. None of the above

C. Neutral

D. Acidic