soil science MCQs – Page 7

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

soil science Mcqs
121. Sulphur is an essential component of:__________?
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A. All of these

B. Cystein

C. Cystine

D. Methionine

122. Humic acid is soluble in____________________?
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A. Acid

B. Alkali

C. Both a & b

D. None of the above

123. The tension of the water at the upper plastic limit is equivalent to pF value:
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A. 2.5 3.5

B. 0.5

C. 2

D. 1

124. The first mechanism to start in the wind erosion is_________?
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A. Saltation

B. Creep

C. Siltation

D. None of these
125. Soil samples are collected:
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A. Boundaries of the field

B. Field with upper white layer of salts

C. None of these

D. From the field with immediate application of fertilizer or amendments

126. Which of the following crop takes N in ammonical form:
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A. Rice

B. Wheat

C. Mustard

D. Cotton

127. Examples of macrobiota are______________________?
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A. Bacteria

B. Fungus

C. Enchytrids

D. Plants

128. Losses of soil water not includes_________?
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A. Direct evaporation from the soil & transpiration from vegetation

B. Surface run-off from the field

C. down-ward drainage

D. Hydroponics loss
129. The albedo of the earth is:__________?
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A. 10%

B. 30%

C. 35%

D. 20%

130. The soil quality is always deteriorated by:_________?
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A. All of these

B. Nutrient mining

C. Waterlogging & salinization

D. Erosion & pollution

131. All the SSP and some nitrophos are are manufactured locally by the National Fertilizer Corporation (NFC): SSP at_________?
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A. All of these

B. Jaranwala

C. Faisalabad

D. Haripur

132. What are diatoms?
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A. None of these

B. Soil Bacteria

C. Soil Algae

D. Soil Fungi

133. Systematic examination of soil in the field and laboratories, their description and grouping according to classification system:
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A. Soel survay

B. The answer of statement is not in options

C. Detailed soil survey

D. Reconnaissance survey

134. Soil word derive from which language?
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A. Latin

B. Greek

C. English

D. None of the above

135. Soil-forming minerals occurring in rocks do not contain any water, they undergo ______________ when exposed to humid conditions & break down as in chemical weathering process:
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A. Dissolution

B. Acidification

C. Hydration

D. Carbonation

136. International Union of Forest Research Organization (IUFRO) is located:
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A. Pakistan

B. Germany

C. Austria

D. Both a & b

137. Soils that have more than 20% organic matter are termed as:__________?
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A. Organic soils

B. Peat soils

C. Muck soils

D. All of these
138. Igneous rocks are called:__________?
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A. Secondary rocks

B. None of the above

C. Aqueous rocks

D. Primary rocks
139. Available water is held between?
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A. Field capacity to wilting point

B. Only field capacity

C. Field capacity to super available water

D. All of the above

140. The practice of managing rows of closely planted woody plants with annual crops planted in alleys in between hedges is called as:________?
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A. Soil conservation hedges

B. Hedgerows intercropping

C. Woody Hedgerows

D. All of these