agriculture MCQs – Page 151

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 Review each marked answer and report any item that may be outdated or unclear.

3001. In cotton, zn deficiency is known as_________?
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A. None of these

B. Mottle leaf

C. Fern leaf

D. Little leaf
3002. What is the optimum temperature and pH for nitrifying bacteria ?
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A. All of thses

B. 30-35 c, pH 5.5

C. 25-40 c, pH 8-8.5

D. >35 c, pH less than 5

3003. From the point of view of crop production, Soil testing refers to______________?
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A. Laboratory analysis assessing plant available nutrient status

B. Collection of plant leaves samples only

C. Salinity & elemental toxicity of a soil

D. Both A & C
3004. Weathering process-physical, chemical, and biological _______________, the rocks and minerals into simpler products which either accumulate in place or are transported to other places where they become soil parent materials?
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A. Disintegrate

B. Disentigrate

C. Decompose

D. Both a & c
3005. 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

3006. 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
3007. 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

3008. 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

3009. 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

3010. Journal Plant and Soil is published from__________?
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A. The Neterlands

B. USA

C. Japan

D. Pakistan

3011. 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

3012. 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%

3013. 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

3014. 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

3015. 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

3016. 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

3017. The largest soil order in Pakistan?
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A. Vertisols

B. Aridisols

C. Entisols

D. Inceptisols

3018. Specific heat of organic matter is______?
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A. None of these

B. 0.22

C. 0.44

D. 0.33

3019. 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

3020. 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