Second Term Agricultural Science Examination for Primary 5

Examination on Agricultural Science

Class: Primary 5

Term: Second Term

Time: 1 Hour

Total Marks: 70

SECTION A: OBJECTIVES (40 Marks)

Instruction: Answer all questions.

1. ________ is any plant that grows where it is not wanted. (a) Crop (b) Weed (c) Flower (d) Seed

2. The ________ are organisms that cause physical damage to crops. (a) weeds (b) pests (c) fertilizers (d) humus

3. An example of a common insect pest that destroys grains is ________. (a) caterpillar (b) locust (c) weevil (d) butterfly

4. Which of the following is a problem caused by weeds on a farm? (a) Increasing crop yield (b) Competing with crops for nutrients (c) Beautifying the farm (d) Providing shade for farmers

5. All of these are insect pests except ________. (a) grasshopper (b) termite (c) beetle (d) bacteria

6. Which is NOT a method of controlling weeds? (a) Hand pulling (b) Using herbicides (c) Planting healthy seeds (d) Mulching

7. The main reason for using a scarecrow on a farm is ________. (a) to decorate the farm (b) to frighten birds and pests away (c) to provide manure (d) to support climbing stems

8. The correct step in chemical weed control is ________. (a) using a hoe (b) spraying herbicides (c) hand picking (d) burning the bush

9. Which of these is not a causal agent of plant diseases? (a) Fungi (b) Viruses (c) Nematodes (d) Stones

10. ________ control involves using living organisms to reduce weed population. (a) Chemical (b) Biological (c) Cultural (d) Physical

11. The ________ is a pest known for eating crop leaves and causing defoliation. (a) caterpillar (b) weevil (c) nematode (d) virus

12. Keeping the farm free of weeds is a method of ________. (a) increasing pests (b) disease control (c) soil erosion (d) harvesting

13. Which of the following pests live in colonies and destroy wooden structures? (a) Locusts (b) Termites (c) Beetles (d) Grasshoppers

14. All of these are cultural methods of weed control except ________. (a) crop rotation (b) flooding (c) using chemicals (d) mulching

15. Which does NOT cause plant diseases? (a) Bacteria (b) Fungi (c) Clean water (d) Viruses

16. The ________ are pests that move in large groups and eat up all green vegetation. (a) beetles (b) locusts (c) weevils (d) caterpillars

17. A common way to destroy grains in storage is by ________. (a) weevils (b) sunlight (c) fertilizers (d) weeding

18. The main reason for storing farm products properly is ________. (a) to waste money (b) to prevent pest attack (c) to allow weeds grow (d) to make the farm dirty

19. Which of these is not a way pests damage crops? (a) Eating leaves (b) Destroying roots (c) Improving crop growth (d) Boring holes in stems

20. ________ is the use of chemicals like pesticides to kill pests. (a) Biological control (b) Chemical control (c) Cultural control (d) Physical control

SECTION B: THEORY (30 Marks)

Instruction: Answer any THREE questions.

1. (a) Define a weed. (2 marks)

   (b) List three problems weeds cause to farmers. (3 marks)

   (c) Name two common insect pests. (3 marks)

   (d) Mention one causal agent of plant disease. (2 marks)

2. (a) What is biological control of weeds? (2 marks)

   (b) Explain how cultural control measures work. (3 marks)

   (c) State three methods of pest control. (3 marks)

   (d) Define a plant disease. (2 marks)

3. (a) List two damages caused by pests to crop leaves. (2 marks)

   (b) Mention three causal agents of plant diseases. (3 marks)

   (c) Give three examples of insect pests found in Nigeria. (3 marks)

   (d) Name one chemical used for weed control. (2 marks)

4. (a) Define a farm pest. (2 marks)

   (b) List three ways to control plant diseases. (3 marks)

   (c) Why should a farmer keep his surroundings clean? (3 marks)

   (d) What is the use of a weed album? (2 marks)

5. (a) Mention one method of physical pest control. (2 marks)

   (b) Describe how weevils damage farm produce. (3 marks)

   (c) Differentiate between a weed and a pest. (3 marks)

   (d) List one type of cultural weed control. (2 marks)

Objective Marking Scheme

Question 1 – ✅ (b) Weed

Question 2 – ✅ (b) pests

Question 3 – ✅ (c) weevil

Question 4 – ✅ (b) Competing with crops for nutrients

Question 5 – ✅ (d) bacteria

Question 6 – ✅ (c) Planting healthy seeds

Question 7 – ✅ (b) to frighten birds and pests away

Question 8 – ✅ (b) spraying herbicides

Question 9 – ✅ (d) Stones

Question 10 – ✅ (b) Biological

Question 11 – ✅ (a) caterpillar

Question 12 – ✅ (b) disease control

Question 13 – ✅ (b) Termites

Question 14 – ✅ (c) using chemicals

Question 15 – ✅ (c) Clean water

Question 16 – ✅ (b) locusts

Question 17 – ✅ (a) weevils

Question 18 – ✅ (b) to prevent pest attack

Question 19 – ✅ (c) Improving crop growth

Question 20 – ✅ (b) Chemical control