2501. In cation exchange, 18 mg of Ammonium ion can be exchanged for__________?
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A. 46 mg of Na

B. 40 mg of Ca

C. 12 mg of mg

D. 6 mg of Al

2502. Element responsible pollen grain of plant__________?
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A. B

B. N

C. K

D. P

2503. The process by which nutrients chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil:
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A. Infiltration

B. Seeping

C. Leaching

D. Percolation

2504. 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
2505. The maximum amount of water which a soil can hold after free drainage has ceased is called as_______?
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A. Water use efficiency

B. Water holding capacity

C. Water harvesting

D. Water potencial

2506. Journal Plant and Soil is published from__________?
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A. Pakistan

B. Japan

C. USA

D. The Neterlands
2507. The percentage of calcium content in single superphosphate?
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A. 19.5%

B. 24%

C. 30%

D. 25%

2508. Losses of soil water not includes_________?
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A. Hydroponics loss

B. Direct evaporation from the soil & transpiration from vegetation

C. down-ward drainage

D. Surface run-off from the field

2509. Desert locust is__________________?
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A. None of the above

B. Occasional pest

C. Potential pest

D. Key pest

2510. All harvested crops remove plant nutrients from the soil. Whether used for _______________; the various crop products are often consumed far away from the production sites, some times thousands of kilometers away in another country.
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A. Feed

B. industrial raw materials

C. Food

D. All of these
2511. According to FCO, the maximum permissible total N content in the form of urea in DAP should be:_________?
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A. 5.50%

B. 4,50 %

C. 3.50%

D. 2.50 %
2512. There are twelve soil orders found in the world of which six soil orders have been recognized at various locations are________?
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A. The above statement is wrong

B. Entisols, Inceptisols, Aridisols, Alfisols, Mollisols, Vertisols

C. Andisols, Gelisols, Histosols, Spodosols, Oxisols, Ultisols

D. Andisols, Aridisols, Histosols, Vertisols, Regosols, Libosols

2513. During decomposition of organic matter, inititial decomposition is dominated by:__________?
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A. Actinomycetes

B. Bacteria

C. Fungi

D. Both B & C

2514. The availability of essential nutrients from soil to the plants is controlled by the ________ properties of soil:
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A. Physical

B. chemical

C. Biological

D. both A & B

2515. Availability of Zn is higher to crops in:_________?
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A. Acid soils

B. Sodic soils

C. Saline soils

D. Saline-sodic soils

2516. Source of negative charges on silicate clays is/ are________?
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A. All of these

B. Anion exchange

C. Isomorphous substitution

D. Exposed crystal edges

2517. The nutrient element silicon (Si) is:_________?
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A. Beneficial

B. Harmful

C. Both a and b

D. None of the above

2518. Ruminant can digest fiber because it contain____________________?
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A. Enzyme protease

B. None of above

C. Enzyme amylase

D. Enzyme cellulose
2519. Potassium (K) occurs as a constituent of the earths crust in the proportion of_________?
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A. 17%

B. 23%

C. 2.3 %

D. 1.70%

2520. All the practices used to control the pest population with in certain limit are called_________________?
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A. Impossible to control

B. Chemical control

C. Natural control

D. Artificial control
2521. Acidlime is commercially propagated by________?
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A. Seed

B. All of the above

C. Cutting

D. Grafting

2522. Alley cropping means?
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A. Growing of only short duration crops in between two widely spaced rows of fast growing trees

B. Growing of pastures in between two widely spaced rows of fast growing trees

C. Growing of field crops in between two widely spaced rows of fast growing trees

D. Growing of only fooder crops in between two widely spaced rows of first growing trees

2523. Which element is known as chemical police man of plant?
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A. Magnesium

B. Potassium

C. All of the above

D. Phosphorus

2524. 1 mg of H+ will be equal to_________?
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A. 9 mg of Al3+

B. 20 mg of ca2+

C. 12 mg of Mg2+

D. All of the above
2525. The process of deposition of soil materials in the lower layer is termed as:_________?
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A. Illuviation

B. Laterization

C. Podzolization

D. Eluviation

2526. Rate of entry of water in soil is__________?
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A. Leaching

B. Infiltration

C. Percolation

D. Seepage

2527. Which of the following is a component of nucleic acid and protein:
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A. Mg

B. Ca

C. None of the above

D. N
2528. The first mechanism to start in the wind erosion is_________?
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A. None of these

B. Siltation

C. Creep

D. Saltation

2529. The Tree sends down roots from its branches to the soil is known as:___________?
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A. Palm

B. Banyan

C. Oak

D. Pine

2530. Pedogenic processes bring about changes in the parent materials in the form of _____________________, within the soil body (soil profile)?
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A. Additions, losses

B. Transfers and transformations

C. both A and B

D. None of the above

2531. The soils most prone to structural crusts are those which are higher in_________?
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A. Clay content

B. Sodium content

C. Silt content

D. Both A & B
2532. Biological Weathering involves:
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A. All of these

B. Man and Animals

C. Micro- organisms

D. Higher Plants and Roots

2533. Which chemical used to prevent evaporation from surface of water in water bodies?
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A. Cetyle alcohol

B. Methyle alcohol

C. both A and B

D. None of these

2534. Water is the major constituent of all living creatures. Biomass of plants is composed of ________% water:
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A. 65 75%

B. 85 95%

C. 72 62%

D. 75% 80%

2535. The use of all possible control strategies to manage the pest population below economic injury level is called:_______?
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A. IPC

B. IPM

C. Pest resugrgence

D. Pest outbreak

2536. Principles of soil conservation does not include:
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A. Leave barren lands uncultivable to support desrtification degradation

B. Minimize run-off & store surplus water

C. Construction of mini dams & ponds to store water for live stock & other porposes

D. Use non-arable lands effectively

2537. What was the Agriculture sector growth rate in the year 2019?
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A. 4.85%

B. 6.85%

C. 0.85 % ?

D. 2.85%

2538. Humus generally refers to the decomposed organic residues which have undergone a series of degradation and synthesis cycles. The humic substances consist of a series of highly acidic, yellow to black coloured, high molecular weight compounds __________________, which can be separated using different extraction procedures:
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A. Hymatomelanic acid & Humin

B. Humic acid & Fulvic acid

C. both A & B

D. None of these

2539. The one reason of unfruitfulness in fruits may be:__________?
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A. Heterostyly

B. Monoecy

C. Compatibility

D. None of above

2540. In Pakistan there is general deficiency of rainfall. It varies from 125 mm annually in upper Sindh to about 900 mm in the sub-mountainous of northern Pakistan. In Balochistan the mean annual rainfall is about 200 mm, diminishing to ________ mm in the desert of Kharan:
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A. None of these

B.

C. >70 mm

D. 100 mm

2541. 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
2542. Propagation and release of sterile incompatible individuals is done in pest population is called:____________?
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A. Genetic control

B. both A & B

C. None of these

D. Chemical control

2543. Phosphorus (P) is the second major nutrient essential for plant growth. With the exception of Nitrogen (N) and Potassium (K), Phosphorus is required by plants in_________?
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A. Lesser quantities

B. Greater quantities

C. The above statement is wrong

D. Not required

2544. Training includes which one of the following operations?
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A. Only tying

B. Only supporting

C. All of the above

D. Only propping

2545. The marble is a__________?
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A. Thermo metamorphic

B. Not sure

C. Dynamo metamorphic

D. Hydro metamorphic

2546. In Balochistan, deserts also exists in _________, which supoorts wind erosion excluding rocky mountains:
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A. Desert of Kharan

B. Noshki

C. Both A & B

D. Qilla SaifUllah

2547. Previously Essential nutrients required for the growth of plants were sixteen. In recent time the essential nutrients required for the growth of plants are:_________?
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A. 18

B. None of the above

C. 16

D. 17

2548. Roots usually occupy :__________?
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A. 20% or less of soil volume

B. 1% or less of soil volume

C. 10% or less of soil volume

D. 30% or less of soil volume

2549. Granite and Basalt are examples of:___________?
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A. Stratified rocks

B. Aqueous rocks

C. >None of the above

D. Sedimentary Rocks

2550. The tree sends down roots from its branches to the soil is know as:_______?
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A. Banyan

B. Palm

C. Pine

D. Oak