(a) Complete the following table under the following Name of Disease Causal Organism Farm Animals Symptoms Control Farm Animals Affected Symptoms Control Br...

Assessment: WAEC SSCE - Agricultural Science - 2020 (Essay) Subject: Agricultural Science

Question 1 Report

(a) Complete the following table under the following

Name of Disease Causal Organism Farm Animals Symptoms Control Farm Animals Affected Symptoms Control
Brucellosis
Aspergillosis

(b) Discuss five advantages of the battery cage system in poultry production.

(c) State five reasons why some agricultural extension programmes are not successful in West Africa.

Answer Details

(a) Completed disease table:

DiseaseCausal organismFarm animals affectedSymptomsControl
BrucellosisBrucella abortus (a bacterium)Cattle, sheep, goats and pigsAbortion (premature birth), retained placenta, infertility, swollen testes in males, reduced milk yieldVaccination (e.g. strain S19), test-and-slaughter of reactors, isolation of infected stock, hygienic disposal of aborted materials
AspergillosisAspergillus fumigatus (a fungus)Poultry (also cattle)Gasping and difficult breathing, loss of appetite, nodules in the lungs and air sacs, poor growthUse clean dry litter, avoid mouldy feed and bedding, provide good ventilation, disinfect the houses

(b) Five advantages of the battery cage system in poultry production:

  1. Efficient use of space through high stocking density.
  2. Eggs are clean and easily collected with little breakage.
  3. Diseases and parasites are easily controlled since birds do not touch their droppings.
  4. Individual birds are easily observed and poor layers are readily culled.
  5. Feed wastage, broodiness and cannibalism are greatly reduced.

(c) Five reasons why some extension programmes are not successful in West Africa:

  1. Inadequate funding of extension services.
  2. Too few and poorly trained extension agents (a low agent-to-farmer ratio).
  3. Poor roads, transport and communication infrastructure.
  4. Illiteracy of farmers and their resistance to change.
  5. Inconsistent government policies and weak research-extension linkage.

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