soil science MCQs – Page 10

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

soil science Mcqs

181. The lands which are rich in soluble salts and exchangeable sodium:
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A. None of the above

B. Alkaline

C. Saline-Alkaline

D. Saline soil

182. What kind of nitrogenous (N) fertilizers should not be used for flooded soil:
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A. Ammonical

B. Nitrate

C. Ammonical-nitrate

D. Both B & C

183. Based on their diameters, soil pores are divided into:_________?
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A. Macro pores

B. Meso pores & Micro pores

C. Both A & B

D. The above statement is wrong

184. About 40% of the total area of Pakistan is affected by wind erosion. this includes:_________?
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A. Tharparkar & vast areas of Balochistan

B. All of the above

C. Parts of Mianwali and D.G

D. Thal, Cholistan

185. The major soil fertility problems in Pakistani soils deficiencies of N, P and Zn. Deficiencies K, Fe, and B also occur in specific crop genotypes or soil types, while deficiencies of S, Cu, and Mn are negligible. however, the common nutrient deficiencies are_________________: and some micronutrients including Mo?
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A. N, P, K

B. Ca, Mg, S

C. both A & B

D. The above statement is wrong

186. Journal Plant and Soil is published from__________?
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A. The Neterlands

B. USA

C. Japan

D. Pakistan

187. Any tillage and planting system that maintains at least 30% of the soil surface covered by residue after planting for the purpose of reducing soil erosion by water:
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A. Deep Tillage

B. Conservation Tillage

C. Both a & b

D. None of these

188. Water is the major constituent of all living creatures. Biomass of plants is composed of ________% water:
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A. 72 62%

B. 65 75%

C. 85 95%

D. 75% 80%

189. Water occupied the larger soil pores and moves down readily under the force of gravity. Water in excess of the field capacity is termed:
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A. Gravitational water

B. Capillary water

C. None of the above

D. Hygroscopic water

190. Water-erosion can be reduced / controlled by:___________?
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A. Provision of surface-cover that intercepts the rain before hitting the soil.

B. Reducing the amount of runoff by promoting infiltration.

C. Both a & b

D. None of the above

191. The very high temperatures required for ICP-AES are attained by__________?
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A. Plasma

B. None of these

C. Carbon

D. Quartz

192. The capacity of a soil to function on sustained basis promoting plant & animal health:
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A. Soil neutrality

B. Soil quality

C. Both a & b

D. None of these

193. The largest soil order in Pakistan?
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A. Vertisols

B. Aridisols

C. Entisols

D. Inceptisols

194. Specific heat of organic matter is______?
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A. None of these

B. 0.22

C. 0.44

D. 0.33

195. Most out standing green manure crop is__________?
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A. Sun hemp

B. Dhaincha

C. Both of the above

D. None of the above

196. Essentiality criteria of an element :
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A. The role played by an element is specific & can not be replaced by another element.

B. The element is directly involved in the nutrition of the plant.

C. In the absence of an element, its not possible for plant to complete its vegetative cycle.

D. All of these

197. One ha cm of water is equal to__________?
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A. 100 tonnes of water

B. 100000 litres of water

C. Both A & B

D. 10 tonnes of water

198. Being a soil scientist, do you know which is the popular book of soil science of Nyle.C.brady, 14th edition available in markets:
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A. Essenttials of soil sciences

B. Fundamentals of soil

C. The mechanics of soil

D. The nature and properties of soil

199. Oxygen and Silicon together comprise approximately ______ %of the earth crust?
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A. 79%

B. 64%

C. 73%

D. 75 %

200. Volcanic soils:
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A. Endsols

B. Aridisols

C. Gelisols

D. None of the above

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