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