Ambala district is one of the 22 districts of Haryana State of India. District Ambala lies on the North-Eastern edge of Haryana and shares their borders with other districts Kurukshetra, Yamunanagar, Panchkula of Haryana State & Patiala, SAS Nagar of Punjab State and Sirmaur of Himachal Pradesh State. Ambala district is a part of Ambala Division which is the division of Ambala, Kurukshetra, Yamunanagar and Panchkula. Ambala has four sub divisions are Ambala City, Ambala Cantt, Barara and Naraingarh which contains four tehsils are Ambala or Ambala City, Ambala Cantt, Barara and Naraingarh they further contains three sub tehsils Shahzadpur, Mullana, Saha. Ambala town serving as the administrative headquarters of the district. Ambala town has two sub-areas: Ambala Cantonment (also known as Ambala Cantt) and Ambala City, eight kilometres apart, therefore it is also known as "Twin City". It has a large Indian Army and Indian Air Force presence within its cantonment area. It is located 200 km (124 mi) to the north of New Delhi, India's capital and 45 km (28 mi) to the south of Chandigarh, Haryana's capital. This district falls under the Ambala Lok Sabha constituency, which is a reserved for the Scheduled Caste candidates only. This district also has four Vidhan Sabha constituencies, all of which are part of Ambala Lok Sabha constituency. Those are Ambala City, Ambala Cantt, Mulana and Naraingarh. Administration of this district falls under the Ambala division and law and order falls under the Ambala Police Range. The district administration has two sub-divisions, Ambala and Naraingarh. District is further subdivided into 4 community development blocks and 7 revenue tehsils. Community development blocks are Ambala, Ambala Cantt, Barara and Naraingarh. Tehsils are Ambala, Ambala Cantt, Barara, Mullana, Saha, Shahzadpur and Naraingarh. Being located in the Indo-Gangetic Plain, the land is generally fertile and conducive to agriculture. However, primary sector contributes much lesser to the economy of the district than it does to the economy of Haryana.