Jamb Agricultural Science 2015 Past Questions and Answers

Question 21:

• 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 22:

• 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

Question 23:

• JAMB 2015

The following crops will enrich the soil with nitrates except

A. Calopogonium
B. Pueraria
C. Centrosema
D. Axonopus

Question 24:

• JAMB 2015

Close to the time of harvesting of cotton, sunshine is needed to ensure the production of bolls that are

A. Big
B. Bright
C. Not mouldy
D. Not open

Question 25:

• JAMB 2015

Agriculture contributes to the economy of West African countries through the following means except

A. Reduction of poverty through job creation
B. Supply of armament for territorial defence
C. Provision of foreign exchange
D. Supply of raw materials to industries