Waec Agricultural Science 1990 Past Questions and Answers

Question 26:

• WAEC 1990

The mosaic symptom commonly associated with viral diseases of crops can be best observed on

A. Roots
B. Stem
C. Leaves
D. Fruits
E. Flower

Question 27:

• WAEC 1990

Pests of crops that feed by piercing and sucking plants include the following except

A. Stem borers
B. Aphids
C. Cocoa mirids
D. Cotton stainers
E. Cassava mealy bugs

Question 28:

• WAEC 1990

Maize grows best on

A. Sandy soil
B. Sandy-clay soil
C. Clayey-loam soil
D. Loamy soil
E. Silty-clay soil

Question 29:

• WAEC 1990

Soil may be exposed to erosion when a pasture is

A. Undergrazed
B. Overgrazed
C. Paddocked
D. Weeded
E. Fanced

Question 30:

• WAEC 1990

Taungya farm involves the combination of

A. Crop and animal husbandary
B. Crop husbandary and forestry
C. Forestry and animal husbandary
D. Crop husbandary and fish farming
E. Forestry and fishing farming