Agricultural Science 1991 Waec Past Questions and Answers

Question 1 :

• WAEC 1991

The most important soil micro-organisms concerned with decay and nutrients-recycling are

A. Bacteria and fungi
B. Fungi and algea
C. Alga and actinomyces
D. Actinomyces and bacteria
E. Bacteria and algea

Question 2 :

• WAEC 1991

The most important soil micro-organisms concerned with decay and nutrients-recycling are

A. Bacteria and fungi
B. Fungi and algea
C. Alga and actinomyces
D. Actinomyces and bacteria
E. Bacteria and algea

Question 3 :

• WAEC 1991

the nutrient content of soil may be influenced by the following except

A. Harrowing
B. Topography
C. Cropping
D. Fallowing
E. Grazing

Question 4 :

• WAEC 1991

What happens to the nitrogen and sulphur contents of vegetation when burning is used as a means of lans clearing? They

A. Are released by burning and lost as gases
B. Remain in ash as nitrates and sulphates
C. Raise the PH of an acid soil
D. Are released into the soil thus increasing the nutrients of the soil
E. Activate the soil microbes afetr burning

Question 5 :

• WAEC 1991

Which of the following does not occur as a result of poor drained soil?

A. Mottling near the top
B. Decrease in rooting depth
C. Change in colour of the subsoil
D. Decrease in organic matter content
E. Increase in oxygen level of the soil