(a) State four reasons why the prices of most agricultural produce are unstable in West...

(a) Statefour reasons why the prices ofmost agricultural produce are unstable in West

Africa. [ 4 marks ]

(b) Explain the following agricultural extension methods:

(i) method demonstration;

(ii) agricultural shows. [ 4 marks ]

(c) Discuss thecercospora leaf spot disease under the following headings:

(i) crop affected;

(ii) causative agent;

(iii) mode of transmission;

(iv)two symptoms;

(v)one preventive measure. [ 6 marks ]

(d) Statefour advantages ofselection as a method of crop improvement. [ 4 marks ]