Bihar

State overview

Bihar is India's most densely populated agricultural state — 7.0 million hectares of cultivable land supporting roughly 130 million people, with 88% of holdings under 2 hectares (the highest small/marginal-farmer concentration in the country). The Ganga, Kosi, Gandak, Bagmati, Burhi Gandak and Mahananda rivers — eight major systems converging on the plain — make Bihar one of the most water-rich states in India, while paradoxically also the most flood-vulnerable. Roughly 76% of Bihar's geographical area is flood-prone, with the Kosi alone displacing lakhs in years like 2008 and 2017.

Bihar's signature cropping system is rice-wheat in the Indo-Gangetic Plain (around 4.5 million ha rabi wheat, 3.2 million ha kharif paddy) with extensive boro (summer) rice in the saturated chaurs of north Bihar. The state is the #1 producer of litchi in India (Muzaffarpur Shahi litchi GI), #1 in makhana (fox-nut — over 80% of world output from Mithilanchal's 90+ thousand ponds, ratified by GI tag and a 2024 Union-Budget Makhana Board), and ranks high in maize (Khagaria belt, world-class rabi maize productivity of 60+ q/ha), banana (Vaishali) and vegetables (cauliflower/cabbage/brinjal). Sugar industry persists in West Champaran-Bettiah.

Soil profile

Alluvial soils dominate (>90% of cropped area): two sub-types — khadar (younger alluvium of active flood plains, very high fertility, every monsoon receives silt) and bhangar (older terrace alluvium, slightly heavier). North Bihar (Tirhut-Mithila) soils are sandy-loam with shallow water tables (3–6 m) — ideal for boro paddy and makhana. South Bihar (Magadh-Anga) has heavier clayey loams with deeper water tables. Tal land along the Ganga is excellent rabi pulse/chana belt after kharif fallow. Boron and Zn deficiencies are widespread (RAU-Pusa surveys). Calcareous soils in Muzaffarpur–Vaishali require careful P management.

Water resources

Average annual rainfall 1200 mm; 85% in monsoon Jun–Sep. North Bihar is flood-prone — Kosi, Bagmati, Gandak, Burhi Gandak, Mahananda inundate vast tracts every monsoon (the 'Sorrow of Bihar' refers to the Kosi). South Bihar trends drought-prone — Magadh region depends on tank-and-pyne (ahar-pyne) traditional water harvesting. Tubewell + electric pump irrigation has expanded rapidly post-2010 (Diesel Anudan + Krishi Feeder Yojana). Major canal commands: Sone (south Bihar), Kosi (north), Gandak (north-west). Boro (zaid) rice cultivation in waterlogged chaurs is unique to Bihar/eastern UP.

Bigha conversion

In Bihar, one bigha ≈ 0.625 acres (27,220 sq ft). Similar to UP-East. See the area unit converter for instant conversions to acres, hectares, guntha, gaj and katha.

Cropping calendar

Bihar grows three rice crops per year, a near-unique feature in India. The dominant kharif paddy (sali/aghani) is transplanted June-July, harvested October-November. Pre-kharif (autumn) paddy (bhadai/ahuni) is broadcast direct-seeded in March-April and harvested August-September — practised in flood-prone north Bihar to capture the early monsoon. Summer (boro) paddy is the most distinctive — transplanted in saturated chaurs and beels during December-January and harvested April-May using residual moisture and shallow groundwater — Bihar is among India's largest boro-rice states. Rabi wheat is sown 1-30 November (target window), harvested April. Rabi maize in Khagaria-Begusarai-Samastipur is sown Nov-Dec and harvested April-May, achieving among the world's highest yields (60-80 q/ha hybrid). Litchi (Muzaffarpur Shahi GI) flowers Feb-Mar, harvest May-June.

MSP procurement & mandi network

Bihar's MSP-procurement footprint is historically weak relative to its production. Paddy procurement is approximately 20-25 lakh tonnes/year, against marketed surplus of 70+ lakh tonnes — meaning over 60% of paddy farmers sell to traders below MSP. Wheat procurement is even thinner (under 5 lakh tonnes/year). The state's Cooperative Society network (PACS) is the principal procurement instrument, paired with the State Food Corporation. The current MSP for paddy is ₹2,369/q (KMS 2025-26), wheat ₹2,585/q (RMS 2026-27), maize ₹2,400/q. Bihar Diesel Anudan subsidises pump-fuel (₹75/litre during state-notified dry spells), and Bihar Krishi Yantrikaran Yojana provides 50-80% subsidy on farm machinery. The state pioneered e-NAM (electronic National Agriculture Market) integration but APMC reform remains incomplete.

District-wise crop concentrations

District-wise concentrations: paddy (top — Rohtas, Bhojpur, Buxar, Kaimur, Aurangabad, Patna — south Bihar's 'rice bowl'); wheat (top — Rohtas, Aurangabad, Buxar, Kaimur, Gaya); maize (top — Khagaria, Begusarai, Samastipur, Madhepura, Saharsa — among world's best rabi-maize productivity); makhana (top — Darbhanga, Madhubani, Sitamarhi, Saharsa, Purnia — over 80% of world output); litchi (top — Muzaffarpur, East Champaran, Vaishali, Samastipur); banana (top — Vaishali, Hajipur, Samastipur, Muzaffarpur); sugarcane (top — West Champaran, Gopalganj, East Champaran). The flood-prone Kosi belt (Saharsa, Madhepura, Supaul, Khagaria) is challenging but increasingly resilient through SRI/DSR and short-duration varieties (Sahbhagi Dhan).

Climate-resilience & soil-test interpretation

Bihar is among India's most climate-vulnerable large states — 76% of the geographical area is flood-prone, and Bihar accounts for nearly 17% of all annual flood damage in India. The Kosi (the 'Sorrow of Bihar') caused historic floods in 1953, 1968, 2008 (when it breached an embankment and shifted 100+ km east, displacing 30 lakh people). Conversely, south Bihar (Magadh region — Gaya, Nawada, Aurangabad) is recurrently drought-prone. The state's response framework: Bihar Jal-Jeevan-Hariyali (pond restoration), flood-tolerant rice (Swarna-Sub1, Bahadur Sub1, Sahbhagi Dhan), embankment fortification on the Kosi-Gandak-Bagmati systems, and the unique Diesel Anudan support during dry spells. The 2024 Union Budget approved a Makhana Board to scale Mithilanchal's fox-nut value chain to international markets.

Local language

Hindi (Devanagari) is official. Spoken languages: Bhojpuri (west), Magahi (south), Maithili (north — has its own Mithilakshar/Tirhuta script though most maithili literature now uses Devanagari, 8th Schedule recognised), Angika (Bhagalpur). Urdu (Persian-Arabic) is the second official language. Land records on Bihar Bhumi use Hindi.

Soil-test interpretation, FPOs & mechanisation

Bihar's soil-test interpretation uses BAU-Sabour and RAU-Pusa STCR equations. Calcareous loams (Muzaffarpur-Vaishali) need careful P management — application of single super-phosphate (SSP) is preferred over DAP because the Ca2+ ions in calcareous soil fix DAP-P rapidly. Boron deficiency is widespread in Bihar — 1 kg/ha borax for litchi (corrects fruit-cracking), maize, mustard. Boro paddy requires 100-50-40 NPK with frequent N splits to compensate higher leaching in flooded chaurs. FPO targets: Bihar has 800+ FPOs by 2024 — focus on makhana clusters (Mithilanchal), litchi growers (Muzaffarpur), maize FPOs (Khagaria-Begusarai), banana FPOs (Vaishali). JEEViKA (Bihar Rural Livelihoods Mission) is among India's most successful SHG-based rural mobilisation, with 1.3 crore women organised into 10+ lakh SHGs — many of whom are now in agri-FPOs. Krishi Vigyan Kendras in each district provide extension and demonstration.