3251. Who gave the defination of humic acid ?
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A. Gapon

B. Liekig

C. Neir

D. Felbeek
3252. Organic soil are called____________________?
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A. Peat

B. Arid soil

C. Muck

D. Both a & b
3253. Gravimetric water is present in______________________?
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A. None of the above

B. Macro pores

C. Micro pores

D. Meso pores

3254. Places where volcanoes occur are_________________?
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A. All the above

B. Pacific ocean

C. Mid-Atlantic ridge

D. Mediterranean sea

3255. Percentage of N in Ammonium ritract fertilizer is___________________?
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A. 21

B. 39

C. 23

D. 33
3256. The site of grains present in sands structuring range__________________?
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A. 0.0625 mm dia

B. 0-1.0 mm dia

C. None of the above

D. 1.00 0.0625 mm dia

3257. The atmospheric layer lies closest to the earth surface is known as___________________?
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A. Stratosphere

B. Thermosphere

C. Mesosphere

D. Troposphere
3258. Chitin and steroids are_____________________?
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A. Waxes

B. Carbohydrates

C. Proteins

D. Lipids

3259. Which one of the following are macro nutrients__________________?
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A. N,P,K

B. Ca,Mg,S

C. All the above

D. C,H,O

3260. Structure and size of aphantic rock is________________?
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A. Large-Glassy

B. Phenocryst

C. Fine grained

D. Course-grained like

3261. Solution containing molecular weight of a substance in gram per liter of a solution is known as______________________?
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A. None of the above

B. Molar

C. Normal

D. Molal

3262. Corrositivity of water is an indication of___________________?
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A. Salinity

B. Property of polluted material

C. Both a & b

D. None of the above

3263. While handing concentrated acids. bases or other hazardous chemicals use_________________?
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A. Table

B. Fume hoods

C. Both a & b

D. None of the above

3264. Which compound is mostly used in Pakistan for the reclamation of saline-sodic & sodic soils_________________?
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A. Calcite

B. Dolomite

C. Apatite

D. Gypsum
3265. The inner shell of earth consists of_____________________?
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A. Silicate

B. Fe

C. Silicate of Fe & Mg

D. Mg

3266. Common soils found in Pakistan are___________________?
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A. Entisols

B. All the above

C. Inceptisols

D. Arid soils

3267. Process of mixing soil by fauna and flora is called__________________?
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A. Pedoturbation

B. Lessivage

C. Leaching

D. Enrichment

3268. The available form of calcium to plant is________________?
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A. Ca

B. CaO

C. Ca(free cation

D. None of the above

3269. A soil is classified as sodic soil when______________________?
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A. EC is 8.5

B. All the above

C. SAR is >13
3270. The wearing away of the land surface by wind, water, ice or other geological agents is called____________________?
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A. Soil erosion

B. All the above

C. Soil contamination

D. Seepage

3271. Color of fertile soil is_____________________?
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A. Black

B. Green

C. Brown

D. White

3272. The nutrient particularly influencing root growth is___________________?
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A. Phosphorus

B. Nitrogen

C. Organic

D. Zinc

3273. The soil of Sindh (Pakistan) have pH______________________?
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A. 5.0 to 6.5

B. 7.5 to 8.5

C. 6.5 to 7.5

D. 8.5 to 9.5

3274. Gravimetric water is present in__________________?
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A. Mesopores

B. Microspores

C. Macrospores

D. Nanopores

3275. Sewage water consists of water and solids in the following percentage___________________?
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A. 90 & 10

B. 80 & 20

C. None of the above

D. 99 & 1
3276. How many different minerals deposits are found in Pakistan ?
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A. None of the above

B. 30

C. 60

D. 100

3277. Urea in manufactured form gases________________________?
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A. NH3

B. NH48CO2

C. NH3 & CH4

D. All the above

3278. An ion or molecule in the coordination sphere central ion is called__________________?
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A. Chelate

B. Potential

C. Ligand

D. Complexion

3279. Electrical conductivity of saturated paste is written as____________________?
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A. ECP

B. Ecw

C. ECs

D. ECe

3280. Mineral soil contain organic carbon___________________?
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A. >4%

B. 5%

C. >10%

D.
3281. Problem of erosion in Thal and Cholistan is due to____________________?
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A. Water

B. Wind

C. Fire

D. Atmosphere

3282. The plant in which CO2 fixation is solely via the Calvin cycle is_____________________?
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A. CAB

B. CAM

C. C

D. C

3283. Extraction of humic substance can be done by______________________?
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A. NH4OH

B. None of the above

C. NH4Cl

D. NaOH
3284. Clear water with organic matter or sediment and minimum biological activity is known as__________________?
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A. Eutrophic

B. Mestrophic

C. Oligotrophic

D. Hydrotrophic

3285. Main product of photosynthesis is_____________________?
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A. C6H12O6

B. C3H6O6

C. C12H24O12

D. C5H12O6

3286. Soil water can be determined by_____________________?
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A. Mass water content

B. Macro pores

C. Both a & b

D. None of the above

3287. The conductivity of a saturation extract is greater 4 dsm-1 an exchangeable sodium percentage (ESP) of less than 15 and the pH is usually less than 8.5 is called as__________________?
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A. Saline-sodic soils

B. Neutral soils

C. Saline soils

D. Sodic soils

3288. Equation of Ozone is________________________?
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A. O2 O

B. None of the above

C. O3 + O

D. O2 + O =O3
3289. A soil with an ESP greater than 15 is usually classified as___________________?
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A. Sodic soil

B. Saline soil

C. None of the above

D. Acidic soil

3290. Which bacteria causes fermentation__________________?
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A. Bacillus

B. Corey

C. Azotobacter

D. Pseudomonas
3291. Which soil bolds more water ?
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A. Sitry

B. Sandy

C. Clayey

D. Stony

3292. Which one of the following is physical property of soil______________________?
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A. Oxidation

B. Reduction

C. None of the above

D. Hydration

3293. Age of Earth is_____________________?
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A. 4 billion years

B. 4.5 billion years

C. 6 billion years

D. 1 billion years

3294. Acid soils of the worlds arable comprise up to_____________________?
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A. 58%

B. 40%

C. 20%

D. 30%

3295. The unit of electrical conductivity is____________________?
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A. mmhos/m

B. dsm-1

C. ms/cm

D. Al the above

3296. Felsic rocks consists of___________________?
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A. fe

B. Buiotitic

C. Quartz

D. Quartz & Feldspars
3297. Product of microorganism that appears to chelate calcium is called_____________________?
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A. Phospheric acid

B. Carbon dioxide

C. 2-ketoghconic acid

D. Pyruive acid

3298. Auxins promote___________________?
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A. Cell elongation

B. Cell division

C. Both a & b

D. None of the above

3299. pH in coniferous forest is__________________?
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A. Less than 7

B. Neutral

C. Greater than 7

D. Basis

3300. Pneumatic potential is due to____________________?
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A. Petrol

B. Gas

C. Soil

D. Water