agriculture MCQs – Page 65

Practise multiple-choice questions from agriculture for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

3201. Accumulation of soluble salts root zone is known as____________________?
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A. Sodication

B. Degradation

C. Desodication

D. Salininzation
3202. Slipperiness is due to__________________?
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A. Vander walls forces

B. None of the above

C. Wire bond

D. Covalent bond

3203. Antioxidant is used to reduce the process of_____________________?
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A. Reduction

B. Oxidation

C. Both a & b

D. Dehydration

3204. The toxicity level of Zn (mg/kg) in plants suggested by some workers is___________________?
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A. > 50 mg kg-1

B. None of these

C. > 10 mg-1

D. > 400 mg kg-1
3205. Most abundant mineral in the earth crust is______________________?
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A. Feldspar

B. N-Feldspar

C. Amplubole

D. S-Feldspar

3206. Metamorphic rocks are formed from____________________?
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A. Igneous rocks

B. Sedimentary rocks

C. Both a & b

D. Cleavage

3207. Which soil is suitable for nce________________?
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A. None of the above

B. Fine textured

C. Sandy

D. Coarse textured

3208. 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

3209. Which rock contain potash feldspar ?
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A. All the above

B. Gabbro

C. Norile

D. Syeruite
3210. 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
3211. Material deposited by the wind is called____________________?
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A. Regolith

B. Alluvium

C. Eolian

D. Colluvial

3212. Rocks formed from molten magma are called__________________?
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A. Igneous rocks

B. Sedimentary rocks

C. Alluvial rocks

D. All the above

3213. Salt-tolerant plants are called ____________________?
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A. Halophytes

B. Glycophytes

C. Xerophytes

D. All the above

3214. Geochemical weathering processes occurs______________________?
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A. At the level

B. On the mountain

C. On surface

D. Below soil solum
3215. Elements essentially required for growth of all plants species are___________________?
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A. 16

B. 32

C. 3

D. 15

3216. 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

3217. The little clay mineral is_____________________?
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A. Non-expending

B. None of the above

C. None or little expending

D. Expending

3218. The zorawar is brand name of ___________________?
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A. None of the above

B. TSP

C. DAP

D. MAP
3219. 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

3220. 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

3221. The symbol of Na stands for___________________?
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A. Natrium

B. Nickle

C. Neon

D. None of these
3222. Which compound decay slowly______________________?
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A. Amino acid

B. Lignin

C. Cellulose

D. fats

3223. A treeless artic plain is called as___________________?
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A. Glaciers

B. None of the above

C. Barren land

D. Tundra
3224. The reaction of Na2 CO3 salt is____________________?
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A. Alkaline

B. None of the above

C. Neutral

D. Acidic

3225. A soil is categorized as saline when EC of saturation extract is______________________?
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A. 0.4 4.0 dsm-1

B. >4dsm-1

C. 0.4dsm-1

3226. Fine-graned rocks formed on earth crust are called____________________?
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A. Intensive igneous rock

B. Extrusive rock

C. Plutonic

D. Sedimentary rock

3227. The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with___________________?
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A. None of the above

B. 40 meq/100g CEC

C. 3-15 meq/100g CEC

D. 50 meq/100g CEC

3228. Percentage of N in Ammonium sulphate fertilizer is___________________?
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A. 21

B. 45

C. 35

D. 23

3229. Total salt affected soils of Pakistan are____________________?
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A. 10.5 m ha

B. 12.3 m ha

C. 6.3 m ha

D. 5.0 m ha

3230. Most widely spread mineral in the world is________________?
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A. None of the above

B. Iron

C. Kaolinite

D. Salt

3231. Which is passive factor of weathering ?
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A. Organisms

B. Parent material

C. Climate

D. Temperature

3232. Rhyolite in nature is______________________?
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A. Acidic

B. Basic

C. Both a & b

D. None of the above

3233. Na2CO3 salts is___________________?
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A. Neutral

B. Alkaline

C. None of the above

D. Acidic

3234. Perfect hardness of any mineral is determined by___________________?
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A. None of the above

B. pH scale

C. Foot scale

D. Mhos scale
3235. Sugar cane is_____________________?
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A. None of the above

B. C3 plant

C. C4 plant

D. C2 plant

3236. Rocks having coarse bubble holes are called_______________________?
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A. Purr ice

B. Scoria

C. Mafic

D. Felsic

3237. Planets in our system are____________________?
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A. 9

B. 8

C. 10

D. 12

3238. The earth core is made of the following metals ______________________?
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A. None of these

B. Cu & Ni

C. Mg & Ni

D. Fe & Ni
3239. Weathering of gabbros gives_____________________?
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A. Clay and iron oxide

B. Sand and clay

C. Sand and iron oxide

D. Clay and Mg oxides

3240. The term applied to a material which tends to absorb moisture from the atmosphere is called__________________?
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A. Available

B. Hydroscopic

C. Capillary

D. Gravitational

3241. Father of agricultural chemistry is___________________?
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A. Neuron

B. Neil Brady

C. Vonliebig

D. J. jones

3242. pH of Pakistani soils is____________________?
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A. 14

B. 12

C. 7

D. 7.5
3243. The available form of sulphur for plant is___________________?
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A. SO3

B. S2

C. SO2

D. SO-2
3244. Lithosphere refers to____________________?
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A. Zone of ozone

B. Zone of earth crust

C. Zone of water

D. Zone of atmosphere

3245. Primary air pollution is____________________?
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A. SO

B. SO3

C. SO2

D. None of the above

3246. Most of the productive soils in Pakistan have pH______________________?
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A. None of the above

B. 8.5

C. Between 7.5 to 8.5
3247. The chemical formula of Dolomite is________________?
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A. CaMg (CO3)2

B. MgCO3

C. None of the above

D. CaCO3

3248. Formula used for the calculation of sodium absorption ratio is______________________?
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A. SAR=Na / CEC x 100

B. SAR=Na / CEC x 100

C. SAR=Na / [(Ca+Mg)1/2] Na x 2

D. None of these

3249. Large pieces of erupted magma are called_____________________?
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A. Volcanic block

B. Volcanic ash

C. Dike

D. Sill

3250. Vertical movement of water was studied by_________________?
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A. Niel

B. Darcy

C. Ziebig

D. Kohler