Waec Agricultural Science 1988 Past Questions and Answers

Question 6:

• WAEC 1988

Which of the following factors influence agricultural production is biotic factor?

A. Parasite
B. Soil PH
C. Topography
D. Soil texture
E. Temperature

Question 7:

• WAEC 1988

Granite is

A. A sedimentary rock
B. A wealtered rock
C. Mentamorphic rock
D. An igneous rock
E. A plutonic rock

Question 8:

• WAEC 1988

In which layer of the soil profile does most biological activity occur?

A. Parent material
B. D-horizon
C. C-horizon
D. B-horizon
E. A-horizon

Question 9:

• WAEC 1988

When leaves of crop plants show brownish coloration from the tips of the mid-ribs backward, they are showing deficiency symptom of

A. Magnesium
B. Zinc
C. Nitrogen
D. Copper
E. Phosphorus

Question 10:

• WAEC 1988

which of the following farm practices can prevent excessive evaporation from soil surfaces?

A. Liming
B. Mulching
C. Weeding
D. Harrowing
E. Ploughing