Jamb Agricultural Science Past Questions and Answers

Question 96:

• JAMB 2015

The following are advantages of sub-surface irrigation except that

A. It is suitable for soils with low water holding capacity
B. It can be used only for specific types of crops
C. The rate of evaporation is greatly reduced
D. It reduces the incidence of pests

Question 97:

• JAMB 2015

Soil water that is available for root absorption at field capacity is

A. Capillary water
B. Hygroscopic water
C. Gravitational water
D. Superfluous water.

Question 98:

• JAMB 2015

The weight of a sheep increased from 25kg to 45kg in two months.

If the total consumption during the period was 60kg. Determine the feed conversion ratio

A. 1 : 1
B. 1 : 2
C. 3 : 1
D. 4 : 1

Question 99:

• JAMB 2015

Which of the following statements is correct about micro-nutrients? They

A. Promote formation of only root nodules
B. Are required by plants in very small quantities
C. Are fixed into the soil through microbial activity
D. Increase crop tolerance to pest attack.

Question 100:

• JAMB 2015

Yellow colouration of the lower leaves of a growing maize plant may be due to deficiency in

A. Potassium
B. Phosphorus
C. Zinc
D. Nitrogen