Bihar Bihar (; ) is a state in eastern India. It is the 2nd largest state by population in 2019, 12th largest by area of , and 14th largest by GDP in 2021. Bihar borders Uttar Pradesh to its west, Nepal to the north, the northern part of West ...

is located in the

eastern Eastern may refer to: Transportation *China Eastern Airlines, a current Chinese airline based in Shanghai *Eastern Air, former name of Zambia Skyways *Eastern Air Lines, a defunct American airline that operated from 1926 to 1991 *Eastern Air Li ...

region of India, between latitudes 24°20'10"N and 27°31'15"N and longitudes 83°19'50"E and 88°17'40"E. It is an entirely land–locked state, in a subtropical region of the temperate zone. Bihar lies between the humid

West Bengal West Bengal (, Bengali: ''Poshchim Bongo'', , abbr. WB) is a state in the eastern portion of India. It is situated along the Bay of Bengal, along with a population of over 91 million inhabitants within an area of . West Bengal is the fou ...

in the east and the sub humid

Uttar Pradesh Uttar Pradesh (; , 'Northern Province') is a state in northern India. With over 200 million inhabitants, it is the most populated state in India as well as the most populous country subdivision in the world. It was established in 1950 ...

in the west, which provides it with a transitional position in respect of

climate Climate is the long-term weather pattern in an area, typically averaged over 30 years. More rigorously, it is the mean and variability of meteorological variables over a time spanning from months to millions of years. Some of the meteorologi ...

economy An economy is an area of the production, distribution and trade, as well as consumption of goods and services. In general, it is defined as a social domain that emphasize the practices, discourses, and material expressions associated with the ...

and

culture Culture () is an umbrella term which encompasses the social behavior, institutions, and norms found in human societies, as well as the knowledge, beliefs, arts, laws, customs, capabilities, and habits of the individuals in these groups ...

. It is bounded by

Nepal Nepal (; ne, :ne:नेपाल, नेपाल ), formerly the Federal Democratic Republic of Nepal ( ne, सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल ), is a landlocked country in S ...

in the north and by

Jharkhand Jharkhand (; ; ) is a state in eastern India. The state shares its border with the states of West Bengal to the east, Chhattisgarh to the west, Uttar Pradesh to the northwest, Bihar to the north and Odisha to the south. It has an area of . I ...

in the south. Bihar plain is divided into two unequal halves ( North Bihar and South Bihar) by the river

Ganges The Ganges ( ) (in India: Ganga ( ); in Bangladesh: Padma ( )). "The Ganges Basin, known in India as the Ganga and in Bangladesh as the Padma, is an international river to which India, Bangladesh, Nepal and China are the riparian states." is ...

which flows through the middle from west to east. Bihar's land has average elevation above sea level of 173 feet.

Physical and Structural Geography

Bihar has three parts on the basis of physical and structural conditions: the Southern Plateau Region, Bihar's Gangetic Plain, and the Shivalik Region. The

Southern Plateau Southern may refer to: Businesses * China Southern Airlines, airline based in Guangzhou, China * Southern Airways, defunct US airline * Southern Air, air cargo transportation company based in Norwalk, Connecticut, US * Southern Airways Express, M ...

Region is located between

Kaimur district Kaimur district is one of the 38 districts of Bihar, India. The district headquarters are at Bhabua. Before 1991, it was part of Rohtas District. Till 1764 the region (Kaimur district) was a part of Ghazipur District and was a part of Kamsaar Raj ...

in the West to Banka in the East. It is made up of hard rocks like gneiss, schist and granite. This region has many conical hills which are made up of batholim like Pretshil, Ramshila and Jethian hill. Bihar's Plain is located between the

and the Northern Mountains. It is bounded by the 150m contour line in the north as well as in the south. The vast stretch of fertile Bihar Plain is divided by the Ganges River into two unequal parts - North Bihar and the South Bihar. Northern Bihar's Plain is located in

East Champaran East Champaran is an administrative district in the state of Bihar in India.The district headquarters are located at Motihari. Prior to 1st Dec 1977, there was a single district called "Champaran". On 1st Dec 1977, the district was divided into 2 ...

West Champaran West Champaran is an administrative district in the state of Bihar in India, located just west of Birgunj. It is the largest district in Bihar with an area of 5,228 km²(2,019sq mi). It is a part of Tirhut Division. The district headquarte ...

(Terai area with higher elevation), and plains of

Samastipur Samastipur is a city and a municipal corporation (nagar nigam) in Bihar, India. It is the headquarter of Samastipur district and comes under Darbhanga division. The Budhi Gandak river flows through the town. It is one of the five railway divisi ...

Begusarai Begusarai is the industrial and financial capital of Bihar and the administrative headquarters of the Begusarai district, which is one of the thirty-eight districts of the Indian state of Bihar. The district lies on the northern bank of the ...

Saharsa Saharsa is a city and Municipal corporation in the Saharsa District in the eastern part of the state of Bihar, India. It is situated near the eastern banks of the Kosi River. It serves as the administrative headquarters for Saharsa District a ...

and Katihar . Region is drained by Saryu, Gandak, Burhi Gandak, Bagmati, Kamla-Balan, Kosi and Mahananda and their tributaries. Southern Bihar's Plain is narrow than northern plain of Bihar and triangular in shape because many hills are located in this region such as hills of Gaya,

Rajgir Rajgir, meaning "The City of Kings," is a historic town in the district of Nalanda in Bihar, India. As the ancient seat and capital of the Haryanka dynasty, the Pradyota dynasty, the Brihadratha dynasty and the Mauryan Empire, as well as the d ...

, Giriyak,

Bihar Sharif Bihar Sharif is the headquarters of Nalanda district and the fifth-largest sub-metropolitan area in the eastern Indian state of Bihar. Its name is a combination of two words: ''Bihar'', derived from '' vihara'' (meaning monastery), also the nam ...

Sheikhpura Sheikhpura is a town and a municipality in Sheikhpura district in the Indian state of Bihar. Sheikhpura is also an administrative headquarter of Sheikhpura district. Postal code PIN code of Sheikhpura post office is 811105. Postal code for ...

, Jamalpur and Kharagpur hills. Third, Shivalik Region in sub-Himalayan foothills of Shivalik range's shadows the state from Northern part of

over an area 32 km long and 6–8 km wide.

West Champaran district West Champaran is an administrative district in the state of Bihar in India, located just west of Birgunj. It is the largest district in Bihar with an area of 5,228 km²(2,019sq mi). It is a part of Tirhut Division. The district headquarte ...

are clad in a belt of moist deciduous

forest A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' ...

. As well as trees, this consists of scrub, grass and reeds.

Political geography

The state is divided into 9 divisions , 38 districts, 101

subdivisions Subdivision may refer to: Arts and entertainment * Subdivision (metre), in music * ''Subdivision'' (film), 2009 * "Subdivision", an episode of ''Prison Break'' (season 2) * ''Subdivisions'' (EP), by Sinch, 2005 * "Subdivisions" (song), by Rush ...

and 534

circles A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. Equivalently, it is the curve traced out by a point that moves in a plane so that its distance from a given point is const ...

. 12 municipal corporations, 49 Nagar Parishads and 80 Nagar Panchayats for administrative purposes.

Geology

Bihar is in Indo-Gangetic plain so naturally fertile soil is one asset of the state. Thus Indo-Gangetic plain's soil is the backbone of agricultural and industrial development. The Indo-Gangetic plain in Bihar consists of a thick

alluvial Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. All ...

mantle of drift origin overlying in most part, the

siwalik The Sivalik Hills, also known as the Shivalik Hills and Churia Hills, are a mountain range of the outer Himalayas that stretches over about from the Indus River eastwards close to the Brahmaputra River, spanning the northern parts of the Indi ...

and older tertiary

rock Rock most often refers to: * Rock (geology), a naturally occurring solid aggregate of minerals or mineraloids * Rock music, a genre of popular music Rock or Rocks may also refer to: Places United Kingdom * Rock, Caerphilly, a location in Wales ...

s. The soil is mainly little young loam rejuvenated every year by constant deposition of

silt Silt is granular material of a size between sand and clay and composed mostly of broken grains of quartz. Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water. Silt usually has a floury feel ...

clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4). Clays develop plasticity when wet, due to a molecular film of water surrounding the clay par ...

and

sand Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class o ...

brought by streams but mainly by

floods in Bihar Bihar is India's most flood-prone state, with 76% of population in the North Bihar living under the recurring threat of flood devastation. Bihar makes up 16.5% of India's flood affected area and 22.1% of India's flood affected population. Abo ...

This soil is deficient in

phosphoric acid Phosphoric acid (orthophosphoric acid, monophosphoric acid or phosphoric(V) acid) is a colorless, odorless phosphorus-containing solid, and inorganic compound with the chemical formula . It is commonly encountered as an 85% aqueous solution, w ...

nitrogen Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at se ...

and humus, but

potash Potash () includes various mined and manufactured salts that contain potassium in water-soluble form.

and

lime Lime commonly refers to: * Lime (fruit), a green citrus fruit * Lime (material), inorganic materials containing calcium, usually calcium oxide or calcium hydroxide * Lime (color), a color between yellow and green Lime may also refer to: Botany ...

are usually present in sufficient quantity. The most common soil in Bihar is Gangetic

alluvium Alluvium (from Latin ''alluvius'', from ''alluere'' 'to wash against') is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. ...

of Indo-Gangetic plain region, Piedmont Swamp Soil which is found in northwestern part of

and Terai Soil which is found in eastern part of Bihar along the border of

. clay soil, sand soil and

loamy soil Loam (in geology and soil science) is soil composed mostly of sand (particle size > ), silt (particle size > ), and a smaller amount of clay (particle size < ). By weight, its mineral composition is about 40–40–20% concentration of sand–sil ...

are common in Bihar.

Natural resources

Bihar is mainly a vast stretch of very fertile flat land. It is drained by the Ganges River, including northern tributaries of other river. The Bihar plain is divided into two unequal halves by the river

which flows through the middle from west to east. Other Ganges tributaries are the

Son A son is a male offspring; a boy or a man in relation to his parents. The female counterpart is a daughter. From a biological perspective, a son constitutes a first degree relative. Social issues In pre-industrial societies and some current c ...

Budhi Gandak The Burhi Gandak River is a tributary of the Ganges. It is known as Narayani in its upper reaches. The Burhi (“Old”) Gandak flows parallel to and east of the Gandak River in an old channel. Course The Burhi Gandak originates from Chautarwa C ...

, Chandan, Orhani and

Phalgu The Phalgu or Falgu, a river that flows past Gaya, India in the Indian state of Bihar, is a sacred river for Hindus and Buddhists. Lord Vishnu's Temple Vishnupad Mandir is situated on the bank of Phalgu river also called Niranjana river. Course ...

. The

Himalayas The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 10 ...

begin at

foothills Foothills or piedmont are geographically defined as gradual increases in elevation at the base of a mountain range, higher hill range or an upland area. They are a transition zone between plains and low relief hills and the adjacent topogr ...

a short distance inside Nepal but influence Bihar's landforms, climate, hydrology and

. Central parts of Bihar have some small hills, for example the Rajgir hills. The

Himalaya The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 100 ...

n Mountains are to the north of Bihar, in

. To the south is the Chota Nagpur plateau, which was part of Bihar until 2000 but now is part of a separate state called

Forest

Bihar has notified forest area of 6,764.14 km², which is 7.1 per cent of its geographical area. The sub Himalayan foothill of Someshwar and Dun ranges in Champaran district another belt of moist

deciduous forest In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, ...

s. These also consists of shrub, grass and reeds. Here the rainfall is above 1,600 mm and thus promotes luxuriant Sal forests in the favoured areas. The hot and dry summer gives the deciduous forests. The most important trees are

Shorea Robusta ''Shorea robusta'', the sal tree, sāla, shala, sakhua, or sarai, is a species of tree in the family Dipterocarpaceae. The tree is native to India, Bangladesh, Nepal, Tibet and across the Himalayan regions . Evolution Fossil evidence from l ...

(Sal),

Shisham ''Dalbergia sissoo'', known commonly as North Indian rosewood or ''shisham'', is a fast-growing, hardy, deciduous rosewood tree native to the Indian subcontinent and southern Iran. ''D. sissoo'' is a large, crooked tree with long, leathery leav ...

, Cedrela Toona, Khair, and

Semal ''Bombax ceiba'', like other trees of the genus ''Bombax'', is commonly known as cotton tree. More specifically, it is sometimes known as Malabar silk-cotton tree; red silk-cotton; red cotton tree; or ambiguously as silk-cotton or kapok, both of ...

. This type of forests also occurs in

Saharsa district Saharsa is one of the thirty-eight districts of Bihar, India. Saharsa city is the administrative headquarters of this district. Saharsa district is a part of the Kosi Division and it became a district on 1 April 1954 and has subsequently become ...

and

Purnia district Purnia District is one of the thirty-eight districts of the Indian state of Bihar. The city of Purnia is the administrative headquarters of this district. The city of Purnia has continued its tradition of hoisting the national flag at 12:07 am o ...

Minerals

Bihar is a producer of

Steatite Soapstone (also known as steatite or soaprock) is a talc-schist, which is a type of metamorphic rock. It is composed largely of the magnesium rich mineral talc. It is produced by dynamothermal metamorphism and metasomatism, which occur in the ...

(945 tonnes),

Pyrites The mineral pyrite (), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. Pyrite's metallic luster and pale brass-yellow hue ...

(9,539 tonnes/year),

Quartzite Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tec ...

(14,865 tonnes/year), Crude Mica (53 tonnes/year),

Limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms whe ...

(4,78,000 tonnes/year). Bihar has also some good resource of

Bauxite Bauxite is a sedimentary rock with a relatively high aluminium content. It is the world's main source of aluminium and gallium. Bauxite consists mostly of the aluminium minerals gibbsite (Al(OH)3), boehmite (γ-AlO(OH)) and diaspore (α-AlO ...

Jamui district Jamui is a district among 38 districts of Bihar state, India. The district was formed on 21 February 1991, when it was separated from Munger district. It is located at a longitude of 86° 13'E and the latitude is 24° 55'N. The present coll ...

, Cement Mortar in Bhabhua,

dolomite Dolomite may refer to: *Dolomite (mineral), a carbonate mineral *Dolomite (rock), also known as dolostone, a sedimentary carbonate rock *Dolomite, Alabama, United States, an unincorporated community *Dolomite, California, United States, an unincor ...

in Bhabhua, Glass sand in Bhabhua, Mica in

Muzaffarpur Muzaffarpur () is a city located in Muzaffarpur district in the Tirhut region of the Indian state of Bihar. It serves as the headquarters of the Tirhut division, the Muzaffarpur district and the Muzaffarpur Railway District. It is the fourth ...

Nawada Nawada is a city and a municipality in Bihar, India. It is also the headquarters of the Nawada district. It is the headquarters of the subdivision of the same name, lying on both sides of the Khuri River( also known as Sakri river in some part ...

Jamui Jamui is a town and a municipality in Jamui district in the Indian state of Bihar. It is the district headquarter of Jamui district. Jamui was formed as a district on 21 February 1991 as a result of its separation from Munger. It is part of Mun ...

, Gaya and

salt Salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in the form of a natural crystalline mineral is known as rock salt or halite. Salt is present in vast quant ...

in Gaya and Jamui, Uranium and Beryllium are found in Gaya District,Coal in Rajmahal Coalfield, Gold In Jamui.

Water bodies

River A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of w ...

Ajay River Ajay (/ˈədʒɑɪ/) is a river which flows through the Indian states of Bihar, Jharkhand and West Bengal. The catchment area of Ajay River is . See also List of rivers of India This is a list of rivers of India, starting in the west and movin ...

Bagmati , "Tiger Gate") , source1_location = Shivapuri, Sundarijal, Kathmandu, Nepal , source1_coordinates= , source1_elevation = , mouth = Confluence with Kamala River , mouth_location = Jagmohra, Bihar, India , mouth_coo ...

* Bhutahi Balan *

Gandak The Gandaki River, also known as the Narayani and the Gandak, is one of the major rivers in Nepal and a left bank tributary of the Ganges in India. Its total catchment area amounts to , most of it in Nepal. In the Nepal Himalayas, it is notabl ...

Ghaghra Ghaghra is a census town in the Ghaghra CD block in the Gumla subdivision of the Gumla district in the Indian state of Jharkhand. Geography Location Ghaghra is located at Area overview The map alongside present ...

Gandaki River The Gandaki River, also known as the Narayani and the Gandak, is one of the major rivers in Nepal and a left bank tributary of the Ganges in India. Its total catchment area amounts to , most of it in Nepal. In the Nepal Himalayas, it is notab ...

Kamala Kamala refers to: People * Kamala (name), given name and surname, includes list of people and characters with the name ** Kamala Harris, the 49th and current Vice President of the United States * Kamala (wrestler) (1950–2020), American profess ...

* Karmanasha * Koshi River *

Mahananda River The Mahananda River (Pron:/ˌməhɑːˈnʌndə or ˌmɑːhəˈnʌndə/) is a trans-boundary river that flows through the Indian states of Bihar and West Bengal, and Bangladesh. It is an important tributary of the Ganges. Course The Mahananda ...

* Mohana *

Punpun Punpun is a satellite town in the Patna Metropolitan Region, Patna district, in the Indian state of Bihar. Geography It is located 10 km south of Patna. The name Punpun comes from the nearby Punpun River, a tributary of the Ganges Riv ...

* Sapt Koshi *

Son River Son River ( hi, सोन नदी, also spelt Sone River) is a perennial river located in central India. It originates near Amarkantak Hill in Gaurela-Pendra-Marwahi district of Chhattisgarh and finally merges with the Ganges River near Pa ...

Waterfall A waterfall is a point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf. Waterfalls can be formed in severa ...

* Dhua Kund Falls * Kakolat Waterfall * Karkat Waterfall * Madhuvdhandam Falls * Manjhar Kund Waterfall * North Tank Waterfall * Telhar Waterfall

Spring (hydrosphere)

Manjhar Kund The Manjhar Kund waterfalls also called the Manjhar K Waterfall is situated in Sasaram, the district headquarters of Rohtas District in Bihar. This waterfall is one of the finest falls in India. festival Manjhar Kund comes alive during Raksha B ...

Dhua Kund The Dhua Kund are the pair of waterfalls situated in the city of Sasaram Sasaram ()sometimes also spelled as Sahasram, is an ancient historical city and a municipal corporation region in the Rohtas district of the Bihar state in eastern Indi ...

* Sita Kund * Surya Kund * Rishi Kund

Lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much large ...

* Anupam Lake * Kharagpur Lake * Kanwar Lake Begusarai * Ghora Katora Darbhanga * Gogabil Lake Katihar * Matsyagandha Lake

Pond

* Mangal Talab * Pandu Pokhar

Dams & reservoirs

* Indrapuri Barrage

Hills and Caves

Hills

* Barabar hills * Brahmayoni hills Gaya Dist * Brahmajuni Hills * Bateshwar hills * Dungeshwari hills * Gridhakuta hills * Gurpa hills * Kavadol Hills/ Kauvadol Hills *

Kaimur Range Kaimur Range (also spelt Kymore) is the eastern portion of the Vindhya Range, about long, extending from around Katangi in Jabalpur district of Madhya Pradesh to around Sasaram in Rohtas district of Bihar. It passes through the Rewa and Mirzap ...

* Mandar Hills * Mundeshwari Hills * Nagarjuni Hills * Pretshila Hills * Pragbodhi hills * Ramshila Hills * Rajgir hills * Ramshila hills * Vaibhar Hills

Caves

Barabar Caves The Barabar Hill Caves (Hindi बराबर, ''Barābar'') are the oldest surviving rock-cut caves in India, dating from the Maurya Empire (322–185 BCE), some with Ashokan inscriptions, located in the Makhdumpur region of Jehanabad distric ...

* Bateshwar cave * Dungeshwari Cave * Gopika Cave * Indasala Caves * Lomas Rishi Cave * Mahakala caves * Patalpuri Caves * Pippala cave *

Saptaparni Cave Saptparni Cave, also referred to as Sapta parni guha (Saraiki) or sattapaṇṇi guhā (Pali), literally Seven-leaves-cave (cognate with sapta, sept), is a Buddhist cave site about southwest from Rajgir, Bihar, India. It is embedded in a hill. T ...

* Sattaparnaguha Cave *

Son Bhandar Caves The Son Bhandar Caves (also known as the Swarn Bhandar Caves) are two man-made caves carved into the base of the Vaibhar Hills in Rajgir in the state of Bihar in India. Based on the dedicatory inscription found in the largest cave — which uses ...

Sitamarhi Cave Sitamarhi Cave is an Indian artificial cave, and an important example of Indian rock-cut architecture. The cave is located 20 km south-west from Rajgir, 10 km south-west of Hisua, and dated to the Maurya empire.Gupta, The roots of Indian Art, p ...

* Vadathika Cave

Natural hazards

Flood

Bihar is India's most flood-prone state, with 76% of the population in the north Bihar living under the recurring threat of flood devastation.Flood Management Information System – History of Flood in Bihar
According to some historical data, 16.5% of the total flood affected area in India is located in Bihar while 22.1% of the flood affected population in India lives in Bihar.India Water Portal – Bihar Floods 2008
About out of total geographical area of comprising 73.06% is flood affected. Floods in Bihar are a recurring disaster which on an annual basis destroys thousands of human lives apart from livestock and assets worth millions.

Drought & Famine

Climate

has cool winters, the lowest temperatures being around 0–10 degrees Celsius (33 to 50 degrees Fahrenheit). Winter months are December and January. It is hot in the summer with average highs around 35–45 Celsius ( 95–105 Fahrenheit). April to mid June are the hot months. The

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal osci ...

months of June, July, August, and September see good rainfall. October & November and February & March have cool, pleasant climate.

References and footnotes

{{DEFAULTSORT:Geography Of Bihar