(a) What five advantages could be derived when countries trade with one another?

(b) Highlight four factors which influenced the trade between Nigeria and Canada. 
 

 (a) On a sketch map of Nigeria, show and name the
(i) three climatic belts;
(ii) dominant air masses which influence the climate of Nigeria

(b) Outline three ways in which the Sudan savannah vegetation has adapted itself to the climate in Nigeria

(c) In what four ways is natural vegetation of economic importance to man in Nigeria?
 

(a) Explain any four problems facing Agriculture in Nigeria

(b) Highlight three effects of these problems on the economic development of Nigeria

(c) How can the problems in (a) above be solved?

(a) On an outline map of Nigeria, locate and name:

(i) the rail lines linking Lagos to Nguru

(ii) the railway line linking Port-Harcourt to Kaduna

(b) Explain any four ways in which rail contributed to the economic development of Nigeria

(c) Highlight any three problems of rail transportation in Nigeria 

 Write a geographical account of the Chad basin under the following headings:

(a) Relief and drainage

(b)Agriculture

(c) Problems of development