agriculture MCQs – Page 66

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 Review each marked answer and report any item that may be outdated or unclear.

3251. Who gave the defination of humic acid ?
comments icon0

A. Gapon

B. Liekig

C. Neir

D. Felbeek
3252. Organic soil are called____________________?
comments icon0

A. Peat

B. Arid soil

C. Muck

D. Both a & b
3253. Gravimetric water is present in______________________?
comments icon0

A. None of the above

B. Macro pores

C. Micro pores

D. Meso pores

3254. Places where volcanoes occur are_________________?
comments icon0
A. All the above

B. Pacific ocean

C. Mid-Atlantic ridge

D. Mediterranean sea

3255. Percentage of N in Ammonium ritract fertilizer is___________________?
comments icon0

A. 21

B. 39

C. 23

D. 33
3256. The site of grains present in sands structuring range__________________?
comments icon0
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___________________?
comments icon0

A. Stratosphere

B. Thermosphere

C. Mesosphere

D. Troposphere
3258. Chitin and steroids are_____________________?
comments icon0

A. Waxes

B. Carbohydrates

C. Proteins

D. Lipids

3259. Which one of the following are macro nutrients__________________?
comments icon0

A. N,P,K

B. Ca,Mg,S

C. All the above

D. C,H,O

3260. Structure and size of aphantic rock is________________?
comments icon0

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______________________?
comments icon0

A. None of the above

B. Molar

C. Normal

D. Molal

3262. Corrositivity of water is an indication of___________________?
comments icon0

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_________________?
comments icon0

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_________________?
comments icon0

A. Calcite

B. Dolomite

C. Apatite

D. Gypsum
3265. The inner shell of earth consists of_____________________?
comments icon0

A. Silicate

B. Fe

C. Silicate of Fe & Mg

D. Mg

3266. Common soils found in Pakistan are___________________?
comments icon0

A. Entisols

B. All the above

C. Inceptisols

D. Arid soils

3267. Process of mixing soil by fauna and flora is called__________________?
comments icon0
A. Pedoturbation

B. Lessivage

C. Leaching

D. Enrichment

3268. The available form of calcium to plant is________________?
comments icon0

A. Ca

B. CaO

C. Ca(free cation

D. None of the above

3269. A soil is classified as sodic soil when______________________?
comments icon0

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____________________?
comments icon0
A. Soil erosion

B. All the above

C. Soil contamination

D. Seepage

3271. Color of fertile soil is_____________________?
comments icon0
A. Black

B. Green

C. Brown

D. White

3272. The nutrient particularly influencing root growth is___________________?
comments icon0
A. Phosphorus

B. Nitrogen

C. Organic

D. Zinc

3273. The soil of Sindh (Pakistan) have pH______________________?
comments icon0

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__________________?
comments icon0

A. Mesopores

B. Microspores

C. Macrospores

D. Nanopores

3275. Sewage water consists of water and solids in the following percentage___________________?
comments icon0

A. 90 & 10

B. 80 & 20

C. None of the above

D. 99 & 1
3276. How many different minerals deposits are found in Pakistan ?
comments icon0

A. None of the above

B. 30

C. 60

D. 100

3277. Urea in manufactured form gases________________________?
comments icon0

A. NH3

B. NH48CO2

C. NH3 & CH4

D. All the above

3278. An ion or molecule in the coordination sphere central ion is called__________________?
comments icon0

A. Chelate

B. Potential

C. Ligand

D. Complexion

3279. Electrical conductivity of saturated paste is written as____________________?
comments icon0

A. ECP

B. Ecw

C. ECs

D. ECe

3280. Mineral soil contain organic carbon___________________?
comments icon0

A. >4%

B. 5%

C. >10%

D.
3281. Problem of erosion in Thal and Cholistan is due to____________________?
comments icon0

A. Water

B. Wind

C. Fire

D. Atmosphere

3282. The plant in which CO2 fixation is solely via the Calvin cycle is_____________________?
comments icon0
A. CAB

B. CAM

C. C

D. C

3283. Extraction of humic substance can be done by______________________?
comments icon0

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__________________?
comments icon0

A. Eutrophic

B. Mestrophic

C. Oligotrophic

D. Hydrotrophic

3285. Main product of photosynthesis is_____________________?
comments icon0
A. C6H12O6

B. C3H6O6

C. C12H24O12

D. C5H12O6

3286. Soil water can be determined by_____________________?
comments icon0

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__________________?
comments icon0

A. Saline-sodic soils

B. Neutral soils

C. Saline soils

D. Sodic soils

3288. Equation of Ozone is________________________?
comments icon0

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___________________?
comments icon0
A. Sodic soil

B. Saline soil

C. None of the above

D. Acidic soil

3290. Which bacteria causes fermentation__________________?
comments icon0

A. Bacillus

B. Corey

C. Azotobacter

D. Pseudomonas
3291. Which soil bolds more water ?
comments icon0

A. Sitry

B. Sandy

C. Clayey

D. Stony

3292. Which one of the following is physical property of soil______________________?
comments icon0

A. Oxidation

B. Reduction

C. None of the above

D. Hydration

3293. Age of Earth is_____________________?
comments icon0

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_____________________?
comments icon0

A. 58%

B. 40%

C. 20%

D. 30%

3295. The unit of electrical conductivity is____________________?
comments icon0

A. mmhos/m

B. dsm-1

C. ms/cm

D. Al the above

3296. Felsic rocks consists of___________________?
comments icon0

A. fe

B. Buiotitic

C. Quartz

D. Quartz & Feldspars
3297. Product of microorganism that appears to chelate calcium is called_____________________?
comments icon0

A. Phospheric acid

B. Carbon dioxide

C. 2-ketoghconic acid

D. Pyruive acid

3298. Auxins promote___________________?
comments icon0
A. Cell elongation

B. Cell division

C. Both a & b

D. None of the above

3299. pH in coniferous forest is__________________?
comments icon0
A. Less than 7

B. Neutral

C. Greater than 7

D. Basis

3300. Pneumatic potential is due to____________________?
comments icon0

A. Petrol

B. Gas

C. Soil

D. Water