WAEC Agricultural Science 1999 Theory question 102

Theory question 102

Farm Power

(a) List four farming operations requiring electric power.
(b) State three advantages and three disadvantages for each of the following farm power (i) electricity (ii) animal.

Show the model answer
Model answer

(a) Any four: refrigeration/cold storage; incubation; milking machines; feed milling and mixing; drying of produce; shelling; water pumping; lighting of poultry houses; processing (threshing, parboiling)
(b)(i) Electricity – advantages: clean, fast, reliable for stationary work, easy to operate, versatile; disadvantages: expensive to install, risk of electric shock and fire, irregular supply, cannot be used for field operations
(ii) Animal – advantages: cheap to buy and keep, works on rough or wet land, gives manure, reduces drudgery, can carry produce from inaccessible areas; disadvantages: low power output, slow, needs feeding and guidance, gets tired and sick, needs training

Explanation

Three of each for both power sources.