Waec Agricultural Science 2011 Past Questions and Answers

Question 61:

• WAEC 2011

(a)(i) Define vegetative propagation. [2 marks]
(ii) Give three advantages and three disadvantages of vegetative propagation. [6 marks]
(b) State four cultural methods used for controlling crop pests in the field. [4 marks]
(c) Enumerate four harmful effects of chemical pest control. [4 marks]

Question 62:

• WAEC 2011

(a) Distinguish between a field pest and a storage pest. [2 marks]
(b) Give two reasons for early harvesting of maize from the field. [2 marks]
(c) Describe each of the following methods of crop improvement:
(i) introduction;
(ii) cross breeding. [6 marks]
(d) List six factors that should be considered in selecting a crop variety for your locality. [6 marks]

Question 63:

• WAEC 2011

(a) State four ways in which rangeland is important in livestock production. [4 marks]
(b) If the recommended grazing area per cattle is 3m x 3m. Calculate in hectares the carrying capacity of the rangeland illustrated in the diagram below. [6 marks]

(c) State two benefits of each of the following management practices in animal production:
(i) dipping;
(ii) vaccination;
(iii) artificial insemination. [6 marks]

Question 64:

• WAEC 2011

(a) Give three advantages and three disadvantages of the deep litter system of poultry management. [6 marks]
(b) State three reasons for carrying out each of the following animal husbandry practices:
(i) castration of goats;
(ii) creep feeding of pigs. [6 marks]
(c) Name four local breeds of cattle reared in West Africa. [4marks]

Question 65:

• WAEC 2011

(a) (i) Explain the term/arm credit.
(ii) List five sources of farm credit.
(b) An outbreak of a strange poultry disease is reported in your community.
There is a possibility of the disease spreading to other parts of the country.
(i) Mention the three main extension teaching methods that could be used to create awareness among farmers about the disease. [3 marks]
(ii) Which of the main extension teaching methods is most appropriate for creating awareness about the disease outbreak? [1 mark]
(iii) Give two reasons for your choice of extension teaching method in 9(b Xii). [2 marks]
(iv) Mention three problems that could be encountered in the use of the selected extension teaching method. (3 marks)