Jamb Agricultural Science Past Questions For Year 2015
Question 11
In which layer of the soil profile do most biological activities occur?
- A. D-horizon
- B. C-horizon
- C. B-horizon
- D. A-horizon
Question 12
Which of the following diseases commonly occurs during brooding?
I. Yolk sac infection
II. Coccidiosis
III. Fowl pox
IV. Pullorum
- A. Yolk sac infection
- B. I, II and III only
- C. I, II and IV only
- D. I, III and IV only
- E. I, II and IV.
Question 13
Which of the following properties of soil determines its water-holding capacity?
I. Texture
II. pH
III. Colour
IV. Structure
- A. Texture
- B. I and II only
- C. I and IV only
- D. II and III only
- E. III and IV only
Question 14
Which of the following factors are causes of deforestation in West Africa?
I. Expansion of cultivated land
II. High population growth rate
III. Conservation of wildlife in game reserves
IV. Urban growth
- A. Expansion of cultivated land
- B. I, II and III only
- C. II, III and IV only
- D. I, II and IV only
- E. I, II, III and IV.
Question 15
Which of the following statements is a disadvantage of human power? It
- A. controls other sources of farm power
- B. brings about least damage
- C. is easily available and controlled
- D. has low output.
