agriculture MCQs – Page 160

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 Review each marked answer and report any item that may be outdated or unclear.

3181. The moisture content below which a cohesive soil does stick to metal tools is known as______________________?
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A. Alter berg limit

B. Liquid limit

C. Plastic limit

D. Sticky limit
3182. Igneous rock whose crystal is 1 cm called____________________?
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A. Felsic

B. Mafic

C. Pegmatitic

D. Plutonic

3183. The deficient level of N (%) in plants suggested by various workers is____________________?
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A. 0%

B. 5%

C. 3%

D. 10%

3184. Rocks formed from compacted clay or mud are called____________________?
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A. Clay stone

B. Sand stone

C. None of the above

D. Shale
3185. Part of soil which is in contact with root surface is called___________________?
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A. Lithoshpere

B. Rhizoshpere

C. None of the above

D. Atmoshpere

3186. [(NH4)2SO4FeSO66H2O] is the formula of _______________________?
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A. Ammonium sulphate Iron sulphate

B. None of the above

C. Ferrous Ammonium sulphate

D. Sodium ammonium sulphate

3187. Point of zero change means____________________?
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A. All are ionic bond

B. All the covalent bonds

C. None of the above

D. Zero charge at surface
3188. While diluting acid always add_____________________?
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A. Acid to water

B. Water to acid

C. Both a & b

D. none

3189. Microorganisms have C/N ratio of____________________?
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A. 4:1

B. 12:01

C. 20:01

D. 2:01

3190. Thickness of Dikes ranges from___________________?
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A. Few m 10 m

B. Few cm 10 cm

C. 2-10 m

D. 10-12 cm

3191. Soil moisture and ET losses are_________________?
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A. Occasionally related

B. Inversely related

C. Not related

D. Directly related
3192. The chemical formula of urea fertilizer is_______________________?
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A. NH<sub>2</sub>CONH<sub>2</sub>

B. [CO(NH<sub>2</sub>)]

C. Both a & b

D. None of the above

3193. The exact formula for calculating the base saturation percentage is_____________________?
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A. Bas saturation percentage = CA+Mg+Na / CEC x 100

B. None of the above

C. Bas saturation percentage = /CEC / CA+Mg+Na x 100

D. Bas saturation percentage = /CEC / CA+Mg x 100

3194. Humic acid is soluble in______________________?
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A. Acid

B. Alkali

C. Both a & b

D. Distilled water

3195. Which silica mineral is present in soil in abundant quantity____________________?
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A. Smectite

B. Quartz

C. All the above

D. Gypsum

3196. The factor used for conversion of P to P2O3 is____________________?
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A. o.453

B. None of the above

C. 0.643

D. 0.436
3197. According to WAPDA, the ECe of the salt free soil should remain__________________?
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A. 4-8 dsm-1

B. None of the above

C. < 4 dsm-1

D. Equal to 4 dsm-1

3198. The lower limit of available water is called ____________________?
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A. Field capacity

B. Hygroscopic water

C. Available water

D. Wilting point
3199. Tuff is__________________?
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A. Consolidated ash

B. Soil

C. Water

D. Volcanic ash
3200. The science of growing terrestrial plants in an aerated solution is known as___________________?
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A. Hydrology

B. Nutrient film technique

C. Hydrants

D. Hydroponics