Punjab is a State criss-crossed with many rivers such as the Satluj, Beas and Ravi The land is mainly plain, and agriculture is the main occupation of the people. About 86 per cent of the land area is under cultivation with 60 per cent of the irrigation through tubewells, and 40 per cent through canals. The State is the granary of India, with wheat, rice, maize, pulses, oilseeds, mushroom, potatoes, tomatoes being cultivated and exported. The major industries of the State are hand and machine tools, auto parts, sports goods, hosiery and knitwear. All villages in Punjab are electrified. The State has cold winters, severe summers, and average annual rainfall is 62 cm.