Rajasthan, the largest state of India (3, 42,239sq, km.) situated in the north-western part of the Indian Union (23 30’ and 30 11’ North latitude and 69 29’ and 78 17’ East longitude) is largely an arid state for most of its part. The Tropic of Cancer passes through south of Banswara town. Presenting an irregular rhomboid shape, the state has a maximum length of 869 km. from west to east and 826 km. from north to south. The western boundary of the state is part of the Indo-pak international boundary, running to an extent of 1,070 km. It touches four main districts of region, namely, Barmer, Jaisalmer, Bikaner and Ganganagar. The state is girdled by Punjab and Haryana states in the north, Uttar Pradesh in the east, Madhya Pradesh in the southeast and Gujarat in the southwest.