Waec Agricultural Science 1991 Past Questions and Answers

Question 16:

• WAEC 1991

The causal organism of damping-oil disease of okra is a

A. Bacterium
B. Virus
C. Nematode
D. Aphid
E. Fungus

Question 17:

• WAEC 1991

Which of the following crops cannot be easily improved by cross-breeding?

A. Groundnut
B. Cowpea
C. Oil palm
D. Maize
E. Yam

Question 18:

• WAEC 1991

The commonest method of vegetative propagation is by

A. Layering
B. Budding
C. Cutting
D. Grafting
E. Tillering

Question 19:

• WAEC 1991

I. spreading and perennial plant with long and rapid growing stems. II. height of plant about 1.2m III. resistance to dry weather. Which of the following pasture grasses has the description given above?

A. Northern gamba grass
B. Bahama grass
C. Guinea grass
D. Elephant grass
E. Gaint star grass

Question 20:

• WAEC 1991

The annual burning of forest areas encourages

A. Afforestation
B. Deforestation
C. Regeneration
D. Selective explotation
E. Taungya farming