Agricultural Science in JAMB examines candidates’ knowledge of crop production, animal husbandry, soil science, farm tools, and agricultural practices. Practicing past questions helps students understand common exam patterns and improve performance.
Section 1: Agricultural Science JAMB Past Questions 1–10
1. Agriculture can best be defined as:
a) The study of plants only
b) The cultivation of crops and rearing of animals
c) Trading of farm products
d) Fishing activities
Answer: b) The cultivation of crops and rearing of animals
2. Which of the following is a branch of agriculture?
a) Forestry
b) Metallurgy
c) Architecture
d) Astronomy
Answer: a) Forestry
3. The practice of growing only one crop on a piece of land is called:
a) Mixed cropping
b) Crop rotation
c) Monocropping
d) Intercropping
Answer: c) Monocropping
4. The most important factor of agricultural production is:
a) Capital
b) Land
c) Labour
d) Management
Answer: b) Land
5. Which of the following is a tillage operation?
a) Harvesting
b) Weeding
c) Ploughing
d) Marketing
Answer: c) Ploughing
6. The main purpose of crop rotation is to:
a) Increase erosion
b) Reduce soil fertility
c) Maintain soil fertility
d) Destroy crops
Answer: c) Maintain soil fertility
7. Which soil type has the highest water-holding capacity?
a) Sandy soil
b) Loamy soil
c) Clay soil
d) Gravel soil
Answer: c) Clay soil
8. The removal of unwanted plants from a farm is called:
a) Mulching
b) Thinning
c) Weeding
d) Irrigation
Answer: c) Weeding
9. A farm tool used for harvesting cereals is the:
a) Hoe
b) Cutlass
c) Sickle
d) Spade
Answer: c) Sickle
10. Which of the following is a leguminous crop?
a) Maize
b) Rice
c) Cowpea
d) Sorghum
Answer: c) Cowpea
Section 2: Agricultural Science JAMB Past Questions 11–20
11. Livestock refers to:
a) Wild animals
b) Domestic animals kept for economic purposes
c) Pets only
d) Zoo animals
Answer: b) Domestic animals kept for economic purposes
12. Which of the following is a ruminant animal?
a) Pig
b) Goat
c) Rabbit
d) Poultry
Answer: b) Goat
13. The stomach compartment responsible for cud chewing is the:
a) Rumen
b) Reticulum
c) Omasum
d) Abomasum
Answer: a) Rumen
14. Poultry birds are mainly reared for:
a) Wool
b) Eggs and meat
c) Milk
d) Labour
Answer: b) Eggs and meat
15. Artificial insemination is used to:
a) Control weeds
b) Improve animal breeds
c) Prevent erosion
d) Harvest crops
Answer: b) Improve animal breeds
16. The housing system where birds move freely is called:
a) Battery cage
b) Deep litter
c) Intensive system
d) Free-range system
Answer: d) Free-range system
17. Which disease affects poultry most?
a) Trypanosomiasis
b) Newcastle disease
c) Tuberculosis
d) Foot rot
Answer: b) Newcastle disease
18. A balanced diet for animals must contain:
a) Carbohydrates only
b) Proteins only
c) All essential nutrients
d) Vitamins only
Answer: c) All essential nutrients
19. Which of the following is an example of farm produce?
a) Cement
b) Rice
c) Iron rod
d) Plastic
Answer: b) Rice
20. Overgrazing leads to:
a) Soil fertility
b) Soil erosion
c) Increased yield
d) Water retention
Answer: b) Soil erosion
Section 3: Agricultural Science JAMB Past Questions 21–30
21. Soil erosion is the:
a) Formation of soil
b) Washing away of topsoil
c) Addition of manure
d) Mixing of soil layers
Answer: b) Washing away of topsoil
22. The best method of controlling soil erosion on slopes is:
a) Bush burning
b) Terracing
c) Overgrazing
d) Deforestation
Answer: b) Terracing
23. Fertilizers are used mainly to:
a) Kill pests
b) Improve soil fertility
c) Control weeds
d) Increase rainfall
Answer: b) Improve soil fertility
24. Organic manure includes:
a) Urea
b) NPK
c) Farmyard manure
d) Superphosphate
Answer: c) Farmyard manure
25. Which of the following is an inorganic fertilizer?
a) Compost
b) Green manure
c) Poultry droppings
d) NPK
Answer: d) NPK
26. Irrigation is best defined as:
a) Harvesting crops
b) Artificial application of water to crops
c) Spraying chemicals
d) Planting seeds
Answer: b) Artificial application of water to crops
27. Mulching helps to:
a) Increase evaporation
b) Conserve soil moisture
c) Kill crops
d) Reduce yield
Answer: b) Conserve soil moisture
28. A cash crop is grown mainly for:
a) Family consumption
b) Soil fertility
c) Sale
d) Animal feed
Answer: c) Sale
29. Which of the following is a plantation crop?
a) Yam
b) Cassava
c) Cocoa
d) Millet
Answer: c) Cocoa
30. The use of chemicals to kill weeds is known as:
a) Weeding
b) Herbicide application
c) Thinning
d) Pruning
Answer: b) Herbicide application
Section 4: Questions 31–40
31. Farm mechanization refers to the use of:
a) Labour only
b) Simple tools only
c) Machines in farming
d) Animals only
Answer: c) Machines in farming
32. Which machine is used for ploughing?
a) Tractor
b) Harvester
c) Thresher
d) Sprayer
Answer: a) Tractor
33. The process of removing grains from stalks is called:
a) Winnowing
b) Threshing
c) Milling
d) Drying
Answer: b) Threshing
34. A disease caused by lack of nutrients is known as:
a) Infectious disease
b) Deficiency disease
c) Parasitic disease
d) Genetic disease
Answer: b) Deficiency disease
35. Which of the following is a farm record?
a) Attendance register
b) Sales record
c) Examination record
d) Birth certificate
Answer: b) Sales record
36. The primary aim of farm records is to:
a) Decorate the office
b) Aid planning and decision making
c) Increase rainfall
d) Reduce pests
Answer: b) Aid planning and decision making
37. The breeding of animals for improved qualities is called:
a) Cross-breeding
b) Selection
c) Hybridization
d) All of the above
Answer: d) All of the above
38. Which of the following is a farm pest?
a) Earthworm
b) Grasshopper
c) Goat
d) Cow
Answer: b) Grasshopper
39. Rodents mainly damage crops by:
a) Eating leaves
b) Boring stems
c) Eating grains
d) Sucking sap
Answer: c) Eating grains
40. The practice of burning vegetation on farmland is called:
a) Mulching
b) Bush burning
c) Composting
d) Tilling
Answer: b) Bush burning
Section 5: Questions 41–50
41. Fish farming is known as:
a) Apiculture
b) Pisciculture
c) Horticulture
d) Sericulture
Answer: b) Pisciculture
42. Which of the following is a fish pond type?
a) Concrete pond
b) Plastic pond
c) Wooden pond
d) Iron pond
Answer: a) Concrete pond
43. The main source of protein in livestock feed is:
a) Carbohydrates
b) Vitamins
c) Protein concentrates
d) Minerals
Answer: c) Protein concentrates
44. Which of the following is a forage crop?
a) Maize
b) Groundnut
c) Elephant grass
d) Rice
Answer: c) Elephant grass
45. The male reproductive organ of flowering plants is the:
a) Pistil
b) Ovary
c) Stamen
d) Sepal
Answer: c) Stamen
46. The female reproductive part of a flower is the:
a) Anther
b) Filament
c) Pistil
d) Stigma only
Answer: c) Pistil
47. Pollination is the transfer of pollen from:
a) Leaf to stem
b) Anther to stigma
c) Root to stem
d) Ovary to style
Answer: b) Anther to stigma
48. Which insect helps in pollination?
a) Mosquito
b) Housefly
c) Bee
d) Termite
Answer: c) Bee
49. Harvesting refers to:
a) Planting crops
b) Removing mature crops from the farm
c) Spraying chemicals
d) Storing seeds
Answer: b) Removing mature crops from the farm
50. Agriculture contributes to national development by:
a) Creating unemployment
b) Providing food and raw materials
c) Reducing population
d) Discouraging trade
Answer: b) Providing food and raw materials