Waec Agricultural Science Past Questions and Answers

Question 26:

• WAEC 1988

The most effective method of controlling or preventing viral diseases in plants is by

A. Planting resistant varieties
B. Spraying crops regularly
C. Burning affected crops
D. Practising crop rotation
E. Treating seeds with chemicals

Question 27:

• WAEC 1988

Reduction of ten seedlings of pawpaw to two per stand is referred to as

A. Pruning
B. Thinning
C. Uprooting
D. Weeding
E. Spacing

Question 28:

• WAEC 1988

Which of the following describes the steps in making hay?

A. Cut-sun-bale
B. Dry-silage-silo
C. Soilage-ferment-cut
D. Cut-graze-paddock
E. Bale-dry-silage

Question 29:

• WAEC 1988

A situation where only specified trees in a forest reserve are cut down is known as

A. Selection
B. Afforestation
C. Reforestation
D. Selective exploitation
E. Deforestation

Question 30:

• WAEC 1988

The causative organism of maize rust is

A. A fungus
B. A virus
C. A bacterium
D. An insect
E. A nematode