Waec Agricultural Science 1991 Past Questions and Answers

Question 11:

• WAEC 1991

Most crop plants do not survive in water-logged soils because

A. The dissolved nutrients are too diluted for crop plants
B. The plants will not photosynthesize
C. Their leaves are turgid for respiration
D. Their physiological processes will be increased
E. Oxygen has been displaced to its deficiency for crops

Question 12:

• WAEC 1991

If the ginning percentage of the samaru variety of cotton is 35, what will be the amount of raw cotton obtained from a 6 hectare farm with a yield of 330 kg seed cotton per hectare?

A. 46 kg
B. 96.3 kg
C. 114 kg
D. 693 kg
E. 6930 kg

Question 13:

• WAEC 1991

Which of the following factors does not affect the distribution of pasture grasses?

A. Type of species
B. Temperature
C. Soil
D. Pests and diseases
E. Rainfall

Question 14:

• WAEC 1991

Which of the following is not a reason for the government to encourage the planting of trees

A. Controlling erosion
B. Increasing soil fertility
C. Preventing desert encroachment
D. Reducing effects of environmental pollution
E. Increasing output of mineral oil

Question 15:

• WAEC 1991

Which of the following crops does not require nursery?

A. Rice
B. Tobacco
C. Tomato
D. Oil palm
E. Maize