Economy depends on Agriculture

Pakistan's economy depends on agriculture. The country is fortunate in that the soils, topography and climate are generally suitable for year round agriculture. Due to the existence of the country in arid and semi-arid climatic regions, artificial irrigation has been practiced for a long time. Rainfall in the country is sporadic and the annual rainfall distribution based on per cent of geographical area, which may be classified as, about 68 per cert of the geographical area lies under annual rainfall of 251-500 mm. This leaves only 8 per cent of geographical area where the annual rainfall exceeds 500 mm. Climatic stress due to high temperatures and droughts are characterized as crop growth index and aridity index, respectively.