(a) Food crops are produced basically to provide food for the population while cash crops are produced basically for exports to earn income or foreign exchange for the economy and for industrial uses.
(b) The problem of economic integration include:
(i) Agriculture provides employment for a large proportion of the labour force of the economy.
(ii) It provides food for the teeming population
(iii) It serves as a source of foreign exchange earner. (iv) It supplies raw materials which aid industrial output.
(v) Agriculture conserves foreign exchange by producing imported substitutes.
(vi) Agriculture provides market for industrial products.
(vii) It is a source of government revenue I.e export tax on agricultural product.
(viii) Agriculture contributes to capital accumulation i e, investments by farmers on their farms, savings by farmer In banks, etc contribute to capital accumulation in the country