(a) (i) What is incubation in poultry production? (2 marks) (ii) State two advantages and two disadvantages of natural incubation. (4 marks)

 (b) List four factors that affect pasture establishment in West Africa. (4 marks)

 (c) In a tabular form, state the causal organism and two symptoms of each of the following diseases of farm animals: (i) Brucellosis. (ii) Newscatle. (6 marks) .