agriculture MCQs – Page 153

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 Review each marked answer and report any item that may be outdated or unclear.

3041. Causes of Soil are:__________?
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A. All of these

B. Mismanagement of irrigation syste

C. Indiscriminate felling of trees

D. Over grazing

3042. The marble is a__________?
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A. Thermo metamorphic

B. Not sure

C. Dynamo metamorphic

D. Hydro metamorphic

3043. Phosphorus deficiency is widespread in most (_____%) 0f the soils of Pakistan.
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A. 32%

B. 68%

C. 54%

D. 90%

3044. Granite and Basalt are examples of:___________?
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A. Stratified rocks

B. >None of the above

C. Aqueous rocks

D. Sedimentary Rocks

3045. What is a soil horizon?
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A. All of these

B. Soil structure

C. Soil texture

D. Layers of soil
3046. Roots usually occupy :__________?
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A. 1% or less of soil volume

B. 30% or less of soil volume

C. 10% or less of soil volume

D. 20% or less of soil volume

3047. In low-rainfall areas, huge shifting sand dunes are commonly found, particularly near human habitations. Techniques of afforesting the shifting dunes needed to be implemented. These techniques consist of___________?
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A. Treatment of shifting sand-dunes by fixing barriers in parallel stripes or in a chess-board design, using the local shrub material starting from the crest of the dunes to protect the seedlings from burial or exposure by the blowing of sand.

B. Protection against biotic interference

C. Both a & b

D. None of these

3048. Which element is known as chemical police man of plant?
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A. All of the above

B. Potassium

C. Phosphorus

D. Magnesium

3049. _________ erosion is the removal of a thin layer of soil by water acting over the whole surface. This type of erosion damaged very fertile lands located on slopes, some of which have been eroded to a depth of about 15 cm.
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A. Stream bank erosion

B. Rain splash rill erosion

C. Sheet erosion

D. Gully erosion

3050. 1 mg of H+ will be equal to_________?
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A. 12 mg of Mg2+

B. 20 mg of ca2+

C. 9 mg of Al3+

D. All of the above
3051. Principles of soil conservation does not include:
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A. Construction of mini dams & ponds to store water for live stock & other porposes

B. Use non-arable lands effectively

C. Minimize run-off & store surplus water

D. Leave barren lands uncultivable to support desrtification degradation
3052. Fe, Zn, Mn, Mo, Co, Ni, Cu, are also called __________:
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A. Micro elements

B. Trace elements

C. Both A & B

D. None of these

3053. Availability of Zn is higher to crops in:_________?
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A. Sodic soils

B. Acid soils

C. Saline soils

D. Saline-sodic soils

3054. Accumulation of Al and Fe oxides and clays coming from the upper profile layers:
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A. Zone of evaluation

B. Zone of eluviation

C. Zone of Illuviation

D. None of the above

3055. Nitrosomonas and nitrobacter are together as called_____________?
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A. Nitrification

B. Nitrobacteria

C. Nitosomonas

D. Ammonification

3056. The nutrient element silicon (Si) is:_________?
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A. Beneficial

B. Harmful

C. Both a and b

D. None of the above

3057. A group of soils with same parent material but located at different positions of slope?
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A. Biosequence

B. Chronosequence

C. Cateena

D. Catena
3058. Walkley and Blacks method of organic matter determination allows recovery of _____% organic carbon content:
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A. 54%

B. 62.50%

C. 34%

D. 74 %
3059. The appropriate method to apply phosphatic fertilizers is__________?
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A. Top dressing

B. Broad casting

C. both A and B

D. Basal placement
3060. The Tree sends down roots from its branches to the soil is known as:___________?
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A. Oak

B. Banyan

C. Palm

D. Pine