PPSC Past Papers Preparation for Agriculture Officer

PPSC Past Paper 2026 for the post of Senior Agriculture Officer / ADA Ext / ADA Farm / SAO Ext (BS-18)

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As this PPSC Past paper 2026 is compiled, some questions or answers may vary but mostly are same. In case of issue with any answer, please mention in comments below:

✅ PPSC Past Paper 2026 MCQs (Set – 104)

1. Fruit trees can grow best at pH:
A) 4–5
B) 5.5–8.5 ✅
C) 8–10
D) Above 9

2. Botanical name of wheat:
A) Triticum durum
B) Triticum aestivum ✅
C) Oryza sativa
D) Hordeum vulgare

3. Recommended seed rate of wheat:
A) 20 kg/acre
B) 30 kg/acre
C) 40 kg/acre ✅
D) 50 kg/acre

4. Jute fiber is obtained from:
A) Root
B) Leaf
C) Stem ✅
D) Fruit

5. Cane sugar contains:
A) Glucose
B) Fructose
C) Sucrose ✅
D) Maltose

6. In DNA, adenine pairs with:
A) Guanine
B) Cytosine
C) Thymine ✅
D) Uracil

7. Tensiometer is used to measure:
A) Soil pH
B) Soil moisture tension ✅
C) Temperature
D) Humidity

8. Sugarcane seed is called:
A) Grain
B) Fuzz ✅
C) Kernel
D) Pod

9. Asexually propagated crop:
A) Wheat
B) Rice
C) Sugarcane ✅
D) Maize

10. Intercropping canola with wheat controls:
A) Weeds
B) Aphids ✅
C) Fungi
D) Nematodes

11. Mitochondria is:
A) Protein factory
B) Powerhouse of cell ✅
C) Storage organ
D) Nucleus

12. American cotton is:
A) Diploid
B) Triploid
C) Tetraploid ✅
D) Haploid

13. Karyogamy means:
A) Cell division
B) Fusion of nuclei ✅
C) Cytoplasm division
D) Pollination

14. Parthenocarpy produces:
A) Seeded fruits
B) Seedless fruits ✅
C) Roots
D) Flowers

15. Anything related to growing vegetables, its marketing, its export is called:
A) Agronomy
B) Horticulture
C) Olericulture ✅
D) Floriculture

16. Soil deposited by water is:
A) Colluvial
B) Alluvial ✅
C) Residual
D) Aeolian

Alluvial → deposited by water (rivers)
Colluvial → deposited by gravity
Aeolian → deposited by wind
Residual → formed in place

17. More split applications of nitrogen are required in:
A) Clay soils
B) Loamy soils
C) Sandy soils ✅
D) Saline soils

18. Cotton seed cake is used as:
A) Fuel
B) Animal feed ✅
C) Fiber
D) Fertilizer

19. Nutrient not commonly deficient in Pakistani soils:
A) Zinc
B) Iron
C) Copper
D) Molybdenum ✅

20. Salt tolerant fodder crop:
A) Berseem
B) Senji ✅
C) Barley
D) Lucerne

22. Greenhouse Gas emitted from rice fields:
A) CO₂
B) O₂
C) Methane ✅
D) Nitrogen

23. Milking period is called:
A) Gestation
B) Lactation ✅
C) Dry period
D) Estrus

24. Base NOT present in DNA:
A) Adenine
B) Thymine
C) Uracil ✅
D) Cytosine

25. Which ionic ratio is often considered an important indicator when assessing the impact of soil salinity on plant growth and nutrient uptake?

A) Na+/K+ ratio ✅
B) Na+/Cl- ratio
C) Na+/OH- ratio
D) Na+/Ca2+ ratio

26. Dormancy of hard shells is broken by:
A) Scarification ✅
B) Stratification
C) Both A & B
D) Germination

27. Upper limit of available water:
A) Wilting point
B) Field capacity ✅
C) Saturation
D) Hygroscopic

28. Central atom of chlorophyll:
A) Iron
B) Magnesium ✅
C) Zinc
D) Calcium

29. Chromosomes align on the equatorial plate (metaphase plate) in the center of the cell during which phase of cell division?
A) Prophase
B) Metaphase ✅
C) Anaphase
D) Telophase

30. Gross irrigation requirement includes:
A) Net water
B) Total water including losses ✅
C) Rainfall
D) Drainage

31. Total water used by crop is:
A) Net requirement
B) Gross requirement
C) Consumptive use ✅
D) None

32. Growing single crop repeatedly is:
A) Mixed cropping
B) Intercropping
C) Monoculture ✅
D) Relay cropping

33. Terracing is practiced in:
A) Plains
B) Hills ✅
C) Deserts
D) Coastal

34. Unit of photosynthesis:
A) kg
B) µmol CO₂ m⁻² s⁻¹ ✅
C) liter
D) watt

35. Mangrove forests are found in:
A) Plains
B) Coastal areas ✅
C) Hills
D) Deserts

36. Groundnut pods develop from:
A) Root
B) Stem peg ✅
C) Leaf
D) Flower

37. Autopolyploidy is exploited in:
A) Rice
B) Potato / Sugar beet ✅
C) Wheat
D) Maize

38. Tracheids are found in:
A) Animals
B) Plants (xylem) ✅
C) Bacteria
D) Fungi

39. Calcium and Phosphorus are primarily classified as which of the following for plant nutrition?
A) Nutrients
B) Minerals ✅
C) Vitamins
D) Hormones

40. Nominal variable example:
A) Height
B) Weight
C) Gender ✅
D) Wheat Yield in Kgs

41. Nitrosomonas converts:
A) Nitrite → Nitrate
B) Ammonia → Nitrite ✅
C) Nitrogen → Ammonia
D) Nitrate → Nitrogen

42. DAP fertilizer is:
A) Straight
B) Compound ✅
C) Organic
D) Micronutrient

43. If there is requirement of 60 Kg K per acre, how many bags of MoP will be used:
A) 1 bag
B) 2 bags ✅
C) 3 bags
D) 5 bags

44. Chickpea is:
A) Cereal
B) Legume ✅
C) Oilseed
D) Fiber

45. Tubulin is:
A) Amino acid
B) Protein ✅
C) Vitamin
D) Hormone

46. Nucleotides are linked by:
A) Hydrogen bonds
B) Phosphodiester bonds ✅
C) Ionic
D) Peptide

Note: DNA strands are linked by hydrogen bonds.

47. Rhizobium forms nodules in:
A) Roots of legumes ✅
B) Leaves
C) Stem
D) Flowers

48. Diffusion of innovation includes:
A) Innovation → Communication → Channel → Time → Social System ✅
B) Growth → Yield
C) Input → Output
D) Planning → Marketing

Adoption Process Includes these Steps: Awareness → Interest → Evaluation → Trial → Adoption

49. Situation analysis is:
A) Final step
B) First step ✅
C) Middle step
D) Optional

50. Carotene is:
A) Vitamin E
B) Vitamin A precursor ✅
C) Protein
D) Enzyme

51. Electroporation is a widely used technique in biotechnology for:

A) Inducing dormancy in plant seeds
B) Facilitating the uptake of DNA into cells or protoplasts ✅
C) Sterilizing laboratory equipment
D) Measuring the precise pH of cell cultures

52. Capsid is:
A) DNA
B) RNA
C) Protein shell of virus ✅
D) Enzyme

53. Heliophytes prefer:
A) Shade
B) Sunlight ✅
C) Water
D) Cold

54. Available water is:
A) Hygroscopic
B) Capillary water ✅
C) Gravitational
D) Runoff

55. T&V extension system emphasized contact frequency with farmers on _______ basis :
A) Daily
B) Weekly ✅
C) Fortnightly ✅ Confusion
D) Monthly

56. Food at work provides:
A) Protein
B) Energy ✅
C) Fiber
D) Vitamins

57. One cusec equals:
A) 1 liter/sec
B) 1 ft³/sec ✅
C) 1 m³/sec
D) 10 ft³/sec

58. Respiration rate of cattle:
A) 1–5
B) 10–30/min ✅
C) 40–60
D) 70–100

59. FAO hunger (~690 million) equals:
A) 5%
B) 8–9% ✅
C) 15%
D) 20%

60. Deciduous plants are found in:
A) Plains
B) Hilly areas ✅
C) Deserts
D) Coastal

61. Dryland crop sown after sorghum/millet:
A) Rice
B) Chickpea ✅
C) Sugarcane
D) Cotton

62. Deciduous plants shed leaves in:
A) Summer
B) Winter / Dry season ✅
C) Spring
D) Autumn only

63. Groundnut peg is a modification of:
A) Root
B) Stem ✅
C) Leaf
D) Flower

64. Fusarium oxysporum causes:
A) Blight
B) Rust
C) Wilt disease ✅
D) Smut

65. Vesicular Arbuscular Mycorrhizae (VAM) are:
A) Ectomycorrhiza
B) Endomycorrhiza ✅
C) Both
D) None

66. If stomata are closed, water use efficiency:
A) Decreases
B) Increases ✅
C) Remains same
D) Stops

67. Nitrobacter converts:
A) Ammonia → Nitrite
B) Nitrite NO₂⁻ → Nitrate NO₃⁻ ✅
C) Nitrogen N → Ammonia NH₃
D) Nitrate → Nitrogen

68. Which of the following is NOT considered a “straight fertilizer”?

A) Single Superphosphate (SSP)
B) Triple Superphosphate (TSP)
C) Urea
D) Di-ammonium Phosphate (DAP) ✅

69. Biological pest control means:
A) Using chemicals
B) Using natural enemies ✅
C) Mechanical control
D) Burning crops

70. Contact insecticides kill insects by:
A) Ingestion only
B) Contact with body surface ✅
C) Smell
D) Light

71. Systemic fungicides are:
A) Surface acting
B) Absorbed and translocated in plant ✅
C) Only soil applied
D) Only seed applied

72. Variety is defined as:
A) Wild plant
B) Cultivated strain adapted to area ✅
C) Hybrid only
D) Mutant only

73. Breeder seed is:
A) Produced by farmers
B) Produced by breeder under supervision ✅
C) Certified seed
D) Market seed

74. Oxidation means:
A) Addition of hydrogen
B) Removal of oxygen
C) Loss of electrons ✅
D) Gain of electrons

75. Reduction means:
A) Gain of electrons ✅
B) Loss of electrons
C) Addition of oxygen
D) Removal of hydrogen

76. Strip tillage is:
A) Full inversion
B) Partial tillage without full inversion ✅
C) Deep ploughing
D) Zero tillage

77. Clean tillage means:
A) No weeds
B) Keeping soil free from weeds by cultivation ✅
C) No irrigation
D) No fertilizer

78. Green manure is best applied in rice-wheat system:
A) After rice
B) After wheat harvest ✅
C) Before wheat
D) During rice

89. Microbial nitrogen is mainly used in form of:
A) N₂
B) NH₄⁺ (Ammonium) ✅
C) NO₃⁻ only
D) Protein

79. Zinc phosphide is:
A) Fungicide
B) Herbicide
C) Rodenticide ✅
D) Insecticide

80. Morphological defects in animals are mostly due to:
A) Accident
B) Genetics ✅
C) Pathogen
D) Climate

81. Double diffuse layer thickness depends on:
A) Temperature
B) Electrolyte concentration (inverse) ✅
C) pH only
D) Texture

82. Humic substances include:
A) Protein
B) Humin, humic acid, fulvic acid ✅
C) Enzymes
D) Minerals

83. Secondary salinization is caused by:
A) Rainfall
B) Irrigation with saline water ✅
C) Fertilizer only
D) Wind

84. Bright sunlight plants are:
A) Sciophytes
B) Heliophytes ✅
C) Hydrophytes
D) Xerophytes

85. Cutting length for planting is:
A) 1–2 inch
B) 3–6 inches (approx.) ✅
C) 10 inches
D) 20 inches

86. Wheat average yield in Pakistan:
A) 0.5 ton/acre
B) 1–1.5 ton/acre ✅
C) 3 ton/acre
D) 5 ton/acre

87. Which one is NOT an amino acid?
A) Methionine
B) Cysteine
C) Acetic acid ✅
D) Glycine

88. Perennial crop example:
A) Wheat
B) Rice
C) Cotton ✅
D) Maize

89. A clone is:
A) Genetically different
B) Genetically identical copy ✅
C) Hybrid
D) Mutant

90. Parthenocarpy occurs without:
A) Fertilization ✅
B) Pollination
C) Germination
D) Flowering

91. Edgar Dale is primarily known in the field of education for developing which influential concept?

A) The theory of multiple intelligences
B) The Cone of Experience ✅
C) Integrated Pest Management (IPM) strategies
D) Bloom’s Taxonomy of educational objectives

92. Idea placed as new is Innovation

93. Smut fungi are obligate parasites that cannot be cultured on artificial media.

94. Animal ancestral record is Pedigree

95. Tracheids are found in Gymnosperms

96. In dry conditions, application of nutrients increase wilting

97. Moisture Stress at which stage in wheat affect maximum grain yield → Heading Stage

98. Not Amino acid → Tubulin

99. Total resistance against stress without any adverse conditions is Immunity

100.Which form of control does not only affect target organisms → Chemical Control

101. Fumigation Pesticide for Nematodes → Methyl Bromide

102. X-ray induced insect is male sterile

103. Storage life depends on rate of respiration