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JAMB 2023

2023 JAMB Agricultural Science Past Questions and Answers

The 2023 JAMB Agricultural Science past questions with answers: 80 objective questions from the 2023 paper in the DeeepSolve question bank, each with its answer behind "Show answer". Try each question before you check, then practise the paper as a timed JAMB-style CBT.

Past questions © the examination body (JAMB/WAEC/NECO). DeeepSolve is not affiliated with them. Rights holders: see /copyright.

Questions

  1. 1.

    What does the concept of demand and supply refer to in agriculture?

    1. A.The government's role in regulating agricultural prices
    2. B.The distribution of agricultural resources among different regions
    3. C.The quantity of agricultural products produced and consumed
    4. D.The interaction between buyers and sellers in agricultural markets
    Show answer

    Answer: D. The interaction between buyers and sellers in agricultural markets

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  2. 2.

    Which of the following is an important aspect of livestock management in agriculture?

    1. A.Irrigation scheduling
    2. B.Fertilizer application rates
    3. C.Animal health and welfare
    4. D.Crop rotation techniques
    Show answer

    Answer: C. Animal health and welfare

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  3. 3.

    What is the primary function of the reproductive system in farm animals?

    1. A.Digestion of food
    2. B.Reproduction and propagation of the species
    3. C.Production of milk for offspring
    4. D.Maintenance of body temperature
    Show answer

    Answer: B. Reproduction and propagation of the species

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  4. 4.

    What is the primary purpose of agricultural mechanization?

    1. A.Promoting sustainable irrigation techniques
    2. B.Increasing crop diversity in farming systems
    3. C.Reducing labor requirements in agriculture
    4. D.Enhancing organic farming practices
    Show answer

    Answer: C. Reducing labor requirements in agriculture

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  5. 5.

    Which of the following are branches of agriculture?

    1. A.Economics and Mathematics
    2. B.Agronomy and Horticulture
    3. C.Biology and Chemistry
    4. D.Botany and Zoology
    Show answer

    Answer: B. Agronomy and Horticulture

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  6. 6.

    What is pollination in plants?

    1. A.The dispersal of seeds by wind or animals
    2. B.The transfer of pollen from the anther to the stigma of a flower
    3. C.The process of seed formation after fertilization
    4. D.The production of flowers by a plant
    Show answer

    Answer: B. The transfer of pollen from the anther to the stigma of a flower

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  7. 7.

    Which of the following is an example of a farm implement used for soil preparation in agriculture?

    1. A.Seeder
    2. B.Sprayer
    3. C.Harvester
    4. D.Plow
    Show answer

    Answer: D. Plow

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  8. 8.

    Which of the following is a common method of disseminating information to farmers?

    1. A.All of the above
    2. B.Social media campaigns
    3. C.Radio broadcasts
    4. D.Field demonstrations
    Show answer

    Answer: A. All of the above

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  9. 9.

    What are the main differences between monocot and dicot plants?

    1. A.Monocots have parallel leaf veins, while dicots have branched leaf veins
    2. B.Monocots have flower parts in multiples of three, while dicots have flower parts in multiples of four or five
    3. C.All of the above
    4. D.Monocots have fibrous root systems, while dicots have taproot systems
    Show answer

    Answer: C. All of the above

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  10. 10.

    What is the role of agricultural extension officers in relation to farmers?

    1. A.To provide financial support to farmers
    2. B.To sell agricultural products to farmers
    3. C.To offer technical advice and assistance to farmers
    4. D.To regulate agricultural practices on farms
    Show answer

    Answer: C. To offer technical advice and assistance to farmers

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  11. 11.

    What is the process of removing the horns of cattle called?

    1. A.Mating
    2. B.Dipping
    3. C.Dehorning
    4. D.Castration
    Show answer

    Answer: C. Dehorning

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  12. 12.

    What is the process of introducing foreign genetic material into an organism called?

    1. A.Transcription
    2. B.Transformation
    3. C.Translocation
    4. D.Translation
    Show answer

    Answer: B. Transformation

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  13. 13.

    What is the primary goal of crop improvement in agriculture?

    1. A.Reducing pest and disease resistance
    2. B.Expanding crop cultivation areas
    3. C.Increasing crop diversity
    4. D.Enhancing crop yield and quality
    Show answer

    Answer: D. Enhancing crop yield and quality

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  14. 14.

    What does the scale of preference represent in agricultural decision-making?

    1. A.The ranking of available choices based on personal preference
    2. B.The availability of resources for agricultural production
    3. C.The total cost of implementing different agricultural practices
    4. D.The market demand for agricultural products
    Show answer

    Answer: A. The ranking of available choices based on personal preference

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  15. 15.

    Which of the following is a common by-product of farm animals?

    1. A.All of the above
    2. B.Wool
    3. C.Fertilizer
    4. D.Milk
    Show answer

    Answer: A. All of the above

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  16. 16.

    What is a potential disadvantage of mass media for farmers?

    1. A.Lack of credibility in agricultural news
    2. B.Insufficient coverage of farming practices
    3. C.Limited access to information
    4. D.Increased cost of agricultural inputs
    Show answer

    Answer: C. Limited access to information

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  17. 17.

    What is the primary objective of agricultural research?

    1. A.Developing new farming technologies
    2. B.Increasing crop diversity
    3. C.Promoting organic farming practices
    4. D.Enhancing agricultural productivity and sustainability
    Show answer

    Answer: D. Enhancing agricultural productivity and sustainability

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  18. 18.

    What is the purpose of using a scale of preference in agricultural decision-making?

    1. A.To evaluate the environmental impact of farming practices
    2. B.To determine the most profitable crops to cultivate
    3. C.To allocate resources effectively among different activities
    4. D.To prioritize agricultural tasks based on urgency
    Show answer

    Answer: C. To allocate resources effectively among different activities

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  19. 19.

    What is commercial agriculture?

    1. A.Large-scale farming for profit and market-oriented production
    2. B.Farming for self-sufficiency and survival
    3. C.Small-scale farming with limited use of modern technology
    4. D.Intensive farming using advanced technology
    Show answer

    Answer: A. Large-scale farming for profit and market-oriented production

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  20. 20.

    Which of the following is an example of an agricultural extension method used to disseminate information to farmers?

    1. A.Crop rotation
    2. B.Irrigation systems
    3. C.Farmer field schools
    4. D.Soil testing
    Show answer

    Answer: C. Farmer field schools

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  21. 21.

    What are some advantages of agricultural extension?

    1. A.All of the above
    2. B.Increased access to modern agricultural technologies
    3. C.Improved farm productivity and profitability
    4. D.Enhanced knowledge and skills of farmers
    Show answer

    Answer: A. All of the above

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  22. 22.

    Which of the following is a method of plant propagation that involves the use of plant parts?

    1. A.Seed propagation
    2. B.Tissue culture
    3. C.Layering
    4. D.Grafting
    Show answer

    Answer: A. Seed propagation

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  23. 23.

    Which of the following is a common problem in agricultural economics and extension?

    1. A.Inadequate market infrastructure
    2. B.Excessive government regulations
    3. C.Overreliance on chemical inputs
    4. D.Lack of access to modern technology
    Show answer

    Answer: A. Inadequate market infrastructure

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  24. 24.

    What is the primary purpose of mixed cropping in agriculture?

    1. A.Maximizing the yield of a single crop
    2. B.Simplifying farm management practices
    3. C.Enhancing soil fertility through crop rotation
    4. D.Reducing the risk of crop failure
    Show answer

    Answer: D. Reducing the risk of crop failure

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  25. 25.

    Which of the following is an example of agricultural technology?

    1. A.Crop rotation
    2. B.Irrigation
    3. C.Organic farming
    4. D.Composting
    Show answer

    Answer: B. Irrigation

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  26. 26.

    What is rock weathering and how does it affect agriculture?

    1. A.Rock weathering is the process of rocks eroding and washing away from agricultural fields
    2. B.Rock weathering is the process of breaking down rocks into smaller fragments
    3. C.Rock weathering is the process of rocks decomposing and releasing nutrients into the soil
    4. D.Rock weathering is the process of rocks absorbing water and expanding in size
    Show answer

    Answer: C. Rock weathering is the process of rocks decomposing and releasing nutrients into the soil

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  27. 27.

    Which of the following is a hand tool commonly used in agriculture for cutting grass or crops?

    1. A.Harrow
    2. B.Plow
    3. C.Scythe
    4. D.Seeder
    Show answer

    Answer: C. Scythe

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  28. 28.

    What is animal production in agriculture?

    1. A.The management and care of livestock for various purposes
    2. B.The breeding and genetic improvement of animals for specific traits
    3. C.The production of animal-based products such as milk and eggs
    4. D.The cultivation of crops for animal consumption
    Show answer

    Answer: A. The management and care of livestock for various purposes

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  29. 29.

    Farm animals can be classified into three main categories based on their primary purpose. Which of the following is NOT one of those categories?

    1. A.Poultry
    2. B.Aquatic animals
    3. C.Companion animals
    4. D.Livestock animals
    Show answer

    Answer: C. Companion animals

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  30. 30.

    What are the primary benefits of agricultural extension services?

    1. A.Preservation of traditional farming practices
    2. B.Enhanced knowledge and skills of farmers
    3. C.Increased crop diversity and yield
    4. D.Improved market access for agricultural products
    Show answer

    Answer: B. Enhanced knowledge and skills of farmers

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  31. 31.

    What does the term "recombinant DNA" refer to in biotechnology?

    1. A.DNA synthesized in a laboratory
    2. B.DNA replicated using polymerase chain reaction (PCR)
    3. C.DNA extracted from ancient fossils
    4. D.DNA modified to contain genes from different organisms
    Show answer

    Answer: D. DNA modified to contain genes from different organisms

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  32. 32.

    What is the primary goal of agricultural extension services in the field of agricultural economics?

    1. A.Promoting sustainable farming practices
    2. B.Maximizing crop yields
    3. C.Enhancing market access for farmers
    4. D.Increasing farm profits
    Show answer

    Answer: D. Increasing farm profits

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  33. 33.

    What is the primary focus of animal husbandry in agriculture?

    1. A.Veterinary care for domestic pets
    2. B.Protection of wildlife habitats
    3. C.Breeding and management of farm animals
    4. D.Crop cultivation for livestock feed
    Show answer

    Answer: C. Breeding and management of farm animals

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  34. 34.

    Which of the following is a primary function of the digestive system?

    1. A.Regulation of body temperature
    2. B.Oxygen transport
    3. C.Production of hormones
    4. D.Absorption of nutrients
    Show answer

    Answer: D. Absorption of nutrients

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  35. 35.

    Which of the following is an example of a biotic factor in an agricultural ecosystem?

    1. A.Rainfall
    2. B.Soil pH
    3. C.Temperature
    4. D.Crop pests
    Show answer

    Answer: D. Crop pests

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  36. 36.

    Which of the following is NOT an agent of pollination in plants?

    1. A.Bees
    2. B.Wind
    3. C.Water
    4. D.Fungi
    Show answer

    Answer: D. Fungi

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  37. 37.

    Which of the following is a branch of agriculture that focuses on the cultivation of fruits, vegetables, and ornamental plants?

    1. A.Apiculture
    2. B.Aquaculture
    3. C.Sericulture
    4. D.Horticulture
    Show answer

    Answer: D. Horticulture

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  38. 38.

    Which of the following is NOT a principle of agronomy?

    1. A.Controlling pests and diseases
    2. B.Managing soil fertility
    3. C.Promoting biodiversity conservation
    4. D.Maximizing crop yield
    Show answer

    Answer: C. Promoting biodiversity conservation

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  39. 39.

    Which of the following is an example of a monogastric animal?

    1. A.Goat
    2. B.Cow
    3. C.Chicken
    4. D.Sheep
    Show answer

    Answer: C. Chicken

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  40. 40.

    What happens to the price of a agricultural product when demand exceeds supply?

    1. A.The price fluctuates randomly
    2. B.The price decreases
    3. C.The price remains unchanged
    4. D.The price increases
    Show answer

    Answer: D. The price increases

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  41. 41.

    What is the primary purpose of an agricultural extension service?

    1. A.Providing financial assistance to farmers
    2. B.Offering training and advisory services to farmers
    3. C.Conducting research on agricultural practices
    4. D.Marketing and selling agricultural products
    Show answer

    Answer: B. Offering training and advisory services to farmers

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  42. 42.

    What factors influence soil fertility in agriculture?

    1. A.pH and soil structure
    2. B.Organic matter content and nutrient availability
    3. C.Soil texture and drainage
    4. D.All of the above
    Show answer

    Answer: D. All of the above

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  43. 43.

    Which of the following is not a branch of agriculture?

    1. A.Horticulture
    2. B.Forestry
    3. C.Agronomy
    4. D.Zoology
    Show answer

    Answer: D. Zoology

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  44. 44.

    What are biotic factors in an agricultural ecosystem?

    1. A.Factors related to the climate and weather
    2. B.Factors related to the living organisms
    3. C.Factors related to the physical environment
    4. D.Factors related to the availability of nutrients
    Show answer

    Answer: B. Factors related to the living organisms

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  45. 45.

    What is the role of agricultural extension officers in the field of agriculture?

    1. A.Providing financial assistance to farmers
    2. B.Marketing agricultural products to consumers
    3. C.Conducting research on new farming techniques
    4. D.Delivering agricultural education and training to farmers
    Show answer

    Answer: D. Delivering agricultural education and training to farmers

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  46. 46.

    What is the primary purpose of farmstead planning in agriculture?

    1. A.Maximizing crop yields
    2. B.Optimizing livestock management
    3. C.Efficient utilization of available space
    4. D.Ensuring efficient water usage
    Show answer

    Answer: C. Efficient utilization of available space

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  47. 47.

    What is the primary purpose of storage facilities in agriculture?

    1. A.Offering a workspace for farm laborers
    2. B.Storing and preserving harvested crops
    3. C.Providing shelter for farm animals
    4. D.Housing agricultural machinery and equipment
    Show answer

    Answer: B. Storing and preserving harvested crops

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  48. 48.

    What is soil conservation, and why is it important in agriculture?

    1. A.Soil conservation involves the removal of topsoil for agricultural purposes
    2. B.Soil conservation refers to the preservation and sustainable management of soil resources
    3. C.Soil conservation aims to maximize crop yields through intensive farming practices
    4. D.Soil conservation focuses on increasing soil fertility through the use of chemical fertilizers
    Show answer

    Answer: B. Soil conservation refers to the preservation and sustainable management of soil resources

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  49. 49.

    What are the important properties of soil in agriculture?

    1. A.pH, organic matter content, and water-holding capacity
    2. B.Drainage, cation exchange capacity, and soil depth.
    3. C.All of the above
    4. D.Texture, structure, and fertility
    Show answer

    Answer: C. All of the above

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  50. 50.

    What is the importance of agriculture?

    1. A.Agriculture has no significant impact on the economy or global trade
    2. B.Agriculture is essential for food production and food security
    3. C.Agriculture provides employment opportunities only in rural areas
    4. D.Agriculture is primarily focused on the production of cash crops for export
    Show answer

    Answer: B. Agriculture is essential for food production and food security

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  51. 51.

    Which of the following is an example of farm machinery used for planting seeds?

    1. A.Combine harvester
    2. B.Harrow
    3. C.Tractor
    4. D.Seed drill
    Show answer

    Answer: D. Seed drill

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  52. 52.

    What is the relationship between demand and supply in agriculture?

    1. A.Demand in agriculture is independent of supply
    2. B.Demand and supply in agriculture are interdependent
    3. C.Supply in agriculture is determined solely by demand
    4. D.Demand and supply in agriculture are unrelated
    Show answer

    Answer: B. Demand and supply in agriculture are interdependent

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  53. 53.

    What is the primary focus of agronomy in agriculture?

    1. A.Management of soil and crops
    2. B.Breeding and genetics of crops
    3. C.Study of climate and weather patterns
    4. D.Marketing and selling of agricultural products
    Show answer

    Answer: A. Management of soil and crops

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  54. 54.

    Which breed of sheep is commonly found in Nigeria and known for its meat production?

    1. A.West African Dwarf
    2. B.Barbados Blackbelly
    3. C.Uda
    4. D.Dorper
    Show answer

    Answer: C. Uda

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  55. 55.

    What is the primary purpose of a pasture in agriculture?

    1. A.Grazing animals for forage
    2. B.Providing shade for livestock
    3. C.Growing cash crops
    4. D.Fostering wildlife habitat
    Show answer

    Answer: A. Grazing animals for forage

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  56. 56.

    Which of the following periods marked the beginning of agricultural practices by early human societies?

    1. A.Paleolithic Age
    2. B.Information Age
    3. C.Renaissance Era
    4. D.Industrial Revolution
    Show answer

    Answer: C. Renaissance Era

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  57. 57.

    What is subsistence agriculture?

    1. A.Export-oriented agricultural production
    2. B.Intensive farming using advanced technology
    3. C.Farming for self-sufficiency and survival
    4. D.Large-scale commercial farming
    Show answer

    Answer: C. Farming for self-sufficiency and survival

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  58. 58.

    What is the primary purpose of processing facilities in agriculture?

    1. A.To process raw agricultural materials into value-added products
    2. B.To provide shelter and housing for livestock
    3. C.To package and label agricultural products
    4. D.To store and preserve harvested crops
    Show answer

    Answer: A. To process raw agricultural materials into value-added products

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  59. 59.

    What is the primary characteristic of weeds in agriculture?

    1. A.They are beneficial for crop growth
    2. B.They compete with crops for resources
    3. C.They are cultivated intentionally by farmers
    4. D.They do not require any maintenance
    Show answer

    Answer: B. They compete with crops for resources

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  60. 60.

    How are farm animals classified based on their feeding habits?

    1. A.By their reproductive strategies
    2. B.By their feeding preferences
    3. C.By their geographical distribution
    4. D.By their size and weight
    Show answer

    Answer: B. By their feeding preferences

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  61. 61.

    What is crop science?

    1. A.The study of agricultural machinery and equipment
    2. B.The study of weather patterns and their impact on crop growth
    3. C.The study of soil fertility and nutrient management
    4. D.The study of plant genetics and breeding
    Show answer

    Answer: D. The study of plant genetics and breeding

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  62. 62.

    What is the primary purpose of farm surveying in agriculture?

    1. A.Mapping land boundaries
    2. B.Determining soil fertility
    3. C.Assessing crop yield
    4. D.Identifying pest infestations
    Show answer

    Answer: A. Mapping land boundaries

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  63. 63.

    Which part of a tractor is responsible for providing power to the attached implements or machinery?

    1. A.Steering system
    2. B.Transmission
    3. C.Engine
    4. D.Hydraulic system
    Show answer

    Answer: C. Engine

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  64. 64.

    The Balami is a breed of

    1. A.Pig
    2. B.Sheep
    3. C.Goat
    4. D.Cattle
    Show answer

    Answer: B. Sheep

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  65. 65.

    Which of the following is an example of a pasture commonly used in agriculture?

    1. A.Corn plantation
    2. B.Orange orchard
    3. C.Cattle pasture
    4. D.Wheat field
    Show answer

    Answer: C. Cattle pasture

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  66. 66.

    What is agricultural ecology?

    1. A.The study of genetics and breeding techniques used in agriculture
    2. B.The study of climate change and its effects on agricultural productivity
    3. C.The study of ecological processes in agricultural systems and their interactions
    4. D.The study of agricultural practices and their economic impact on farmers
    Show answer

    Answer: C. The study of ecological processes in agricultural systems and their interactions

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  67. 67.

    Which of the following is an objective of agricultural development programs?

    1. A.Maximizing profits for individual farmers
    2. B.Increasing dependency on external inputs
    3. C.Enhancing sustainable agricultural practices
    4. D.Expanding land holdings for large-scale farms
    Show answer

    Answer: C. Enhancing sustainable agricultural practices

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  68. 68.

    The Sokoto Gudali is a breed of

    1. A.Chicken
    2. B.Cattle
    3. C.Horse
    4. D.Goat
    Show answer

    Answer: B. Cattle

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  69. 69.

    Which of the following is a potential disadvantage of agricultural extension?

    1. A.Lack of access to extension services in remote areas
    2. B.Increased farmer knowledge and skills
    3. C.Strengthened farmer-government relationships
    4. D.Enhanced adoption of improved farming practices
    Show answer

    Answer: A. Lack of access to extension services in remote areas

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  70. 70.

    What is agronomy?

    1. A.The study of crop production and soil management
    2. B.The study of animal breeding and genetics
    3. C.The study of agricultural machinery and equipment
    4. D.The study of plant diseases and pest control
    Show answer

    Answer: A. The study of crop production and soil management

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  71. 71.

    What is the term used to describe the deliberate modification of an organism's genetic material using biotechnology techniques?

    1. A.Mutation
    2. B.Cloning
    3. C.Genetic engineering
    4. D.Hybridization
    Show answer

    Answer: C. Genetic engineering

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  72. 72.

    What is the primary goal of genetic engineering in agriculture?

    1. A.Creating genetically modified organisms (GMOs) with desirable traits
    2. B.Preserving traditional farming practices and crop varieties
    3. C.Eliminating the use of pesticides and fertilizers in farming
    4. D.Enhancing crop yields through traditional breeding methods
    Show answer

    Answer: A. Creating genetically modified organisms (GMOs) with desirable traits

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  73. 73.

    What is a soil profile, and what information does it provide in agricultural practices?

    1. A.A soil profile is an analysis of soil microorganisms and their activities
    2. B.A soil profile is an assessment of soil compaction and drainage
    3. C.A soil profile is a vertical section of the soil that reveals its layers or horizons
    4. D.A soil profile is a measurement of soil pH and nutrient levels
    Show answer

    Answer: C. A soil profile is a vertical section of the soil that reveals its layers or horizons

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  74. 74.

    The N'dama breed of cattle is primarily raised for

    1. A.Fiber production
    2. B.Meat production
    3. C.Milk production
    4. D.Draft power
    Show answer

    Answer: B. Meat production

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  75. 75.

    What are abiotic factors in an agricultural ecosystem?

    1. A.Factors related to the living organisms
    2. B.Factors related to the availability of nutrients
    3. C.Factors related to the climate and weather
    4. D.Factors related to the physical environment
    Show answer

    Answer: D. Factors related to the physical environment

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  76. 76.

    Which of the following is NOT a component of agronomy?

    1. A.Pest management
    2. B.Crop production
    3. C.Soil management
    4. D.Animal husbandry
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    Answer: D. Animal husbandry

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  77. 77.

    Which of the following best describes agricultural marketing?

    1. A.The process of producing agricultural goods
    2. B.The transportation of agricultural products to consumers
    3. C.The storage and preservation of agricultural goods
    4. D.The promotion and selling of agricultural products
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    Answer: D. The promotion and selling of agricultural products

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  78. 78.

    Which of the following is a form of land ownership in which an individual holds complete ownership and control over a piece of land?

    1. A.Tenancy
    2. B.Freehold
    3. C.Leasehold
    4. D.Commonhold
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    Answer: B. Freehold

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  79. 79.

    What are the main components of soil?

    1. A.Water, nutrients, and microorganisms
    2. B.Organic matter, minerals, and air
    3. C.Sand, silt, and clay
    4. D.All of the above
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    Answer: D. All of the above

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  80. 80.

    Which of the following is NOT a component of soil?

    1. A.Organic matter
    2. B.Water
    3. C.rubber
    4. D.Minerals
    Show answer

    Answer: C. rubber

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