Waec Agricultural Science 1991 Past Questions and Answers

Question 56:

• WAEC 1991

(a) With the aid of a fully labelled diagram, describe the carbon cycle. (b) Explain the importance of carbon cycle to Crops and animals

Question 57:

• WAEC 1991

Describe briefly the side effects of preventive and control measures of method diseases and pests of crops under the following headings: (a) chemical control (b) biological control (c) cultural of control .

Question 58:

• WAEC 1991

a) Describe briefly five management methods adopted in the forest area to ensure a continuous timber supply. (b) Enumerate six benefits derived from forestry and range

Question 59:

• WAEC 1991

Explain briefly the following terms: (a). ovulation; (b) oestrus cycle; (c) gestation (d) parturition

Question 60:

• WAEC 1991

a) What is balanced ration ? (b) If birds at point of lay were fed a ration/feed containing: maize meal - 65°/ , groundnut cake - 25%, fish meal - 5% and brewers' grain - 5%. Name the other feed ingredients that are essential which are not listed. State the importance of the ingredients you have listed.