(a) In a tabular form, list ten differences between subsistence agriculture and commercial agriculture. [10marks] (b) State one advantage and one disadvanta...

(a) In a tabular form, list ten differences between subsistence agriculture and commercial agriculture. [10marks]
(b) State one advantage and one disadvantage of the following sources of farm power: 
                (i)           wind; 
                (ii)          internal combustion engine; 
                (iii)         electricity. [6 marks]