soil science MCQs – Page 8

Practise focused soil science questions with marked answers for exam preparation and subject revision.

soil science Mcqs
141. Which of the following techniques is/are used for the soil fertility evaluation?
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A. Aspergillus niger test

B. Plant tissue testing

C. Soil testing

D. All of these
142. According to FCO, the maximum permissible total N content in the form of urea in DAP should be:_________?
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A. 3.50%

B. 2.50 %

C. 5.50%

D. 4,50 %

143. Metamorphic rocks are classified into:___________?
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A. Foliated metamorphic rocks

B. Non-foliated metamorphic rocks

C. Both a & b

D. None of a & b

144. _________refers to the increase in density of a soil as a result of applied load or pressure?
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A. Plough soles

B. Compaction

C. Traffic soles

D. Pudding

145. Pakistan being predominantly an arid and semiarid country, In addition to agricultural productivity losses and increasing poverty, desertification results in significant reductions in _________?
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A. Contributing to global warming

B. All of these

C. loss of biodiversity

D. Carbon storage in soils

146. AAS stands for:___________?
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A. None of these

B. Asia agriculture society

C. Atomic absorption spectrophotometer

D. Atom analyser solution

147. Which of the following statement is wrong regarding, Soil ____________?
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A. Engineering medium & modifies the atmosphere

B. Medium for plant growth & Habitat for organisms

C. Regulates water supply & recycles waste materials

D. Dirt which is threat to all living life & crop production
148. In flood rice, snail feed on bacteria called__________________?
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A. Helix

B. Limnea

C. Azolla

D. None of the above

149. The process of deposition of soil materials in the lower layer is termed as:_________?
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A. Laterization

B. Eluviation

C. Podzolization

D. Illuviation
150. In Pakistan, the major phosphatic fertilizers are:
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A. Nitrophos

B. DAP

C. All of Above

D. SSP

151. Potassium (K) occurs as a constituent of the earths crust in the proportion of_________?
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A. 23%

B. 2.3 %

C. 17%

D. 1.70%

152. Soil Organic Matter (SOM) serves not only as a reservoir of all the required plant nutrients, but it:
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A. Maintains the productivity of soil

B. Provides energy for the microbial

C. Gives structure to the soil

D. All of these
153. Ground water refers to the________?
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A. Water quality determination

B. Aquifer location

C. Water regulation

D. Installation of wells

154. Micas have isomorphous substitution:____________?
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A. Predominantly in tetrahedral layer

B. Predominantly in octahedral layer

C. Both a & b

D. The statement is wrong

155. The indicator used for the the estimation of the organic matter or organic carbon is;_________?
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A. Mixed indicator

B. Diphenylamine indicator

C. Both a and b

D. None of the above

156. The removal of excess water from the ground surface is called:________?
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A. Sub-surface drainage

B. Drainage

C. All of the above

D. Surface operations
157. Which of the following is not the soil order prevail in Pakistan?
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A. None of the above

B. Mollisols

C. Aridisols

D. Alfisols

158. Fe is trivalent in which of the chemical compound:
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A. Fe<sub>2</sub> (NO<sub>3</sub>)<sub>3</sub>

B. Fe (NO3)3

C. Fe<sub>3</sub> (NO<sub>2</sub>)

D. None of these

159. BGA was discovered as a nitrogen fixer in paddy field by ?
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A. Beijerinck

B. None of the above

C. Fred

D. P.K dey
160. _______________ of alluvium (stratified sediment) by earth-worms is the most important soil-forming process in the alluvial plain of Pakistan:
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A. Homogenization

B. Melanization

C. Pedoturbation

D. Lessivage