ମକା: a five-decade rise from coarse cereal to ethanol feedstock
Maize (Zea mays) is India's third cereal by output behind paddy and wheat, with the 2024-25 estimate at roughly 38.5 million tonnes against an area of 11.4 million hectares — a national average yield of about 33.8 quintals per hectare (DES, Third Advance Estimate 2024-25). What looks like a single crop is actually three commercially different value streams: feed maize for poultry and starch (~60% of demand), food-grade maize for atta and corn-flour, and increasingly, ethanol-grade maize bought by OMCs under the EBP (Ethanol Blended Petrol) programme. With petrol blends climbing past 15% in 2024-25 and a 2025 E20 target, maize procurement by distilleries grew over 40% YoY — pulling rabi maize area in Bihar, Telangana and Andhra Pradesh past 1.5 million hectares for the first time.
The Minimum Support Price for 2025-26 KMS is ₹2,400/q, announced by CACP and notified via PIB on 28 May 2025 — a 7% hike over the previous Kharif's ₹2,225/q. In practice, the price farmers actually realise depends heavily on geography. In Karnataka's Davanagere and Haveri mandis, modal prices through November–February typically settle at ₹2,150–2,250/q — below MSP — because procurement infrastructure for maize is thin and FCI does not buy maize in any meaningful volume. In Bihar's Aurangabad-Gaya rabi belt, by contrast, ethanol distilleries (under the EBP framework) actively bid ₹2,400–2,550/q at the farmgate, often higher than MSP. The price spread is a geography problem more than a market problem.
Where maize is grown — state-by-state breakdown
Karnataka (16% of national production): the historical centre of kharif maize, with the Davanagere-Haveri-Bellary belt under hybrid maize for over three decades. Yields run 35–55 q/ha on red and black soil mixes. The state's processing cluster (Davanagere) is the destination for ~70% of southern starch demand.
Madhya Pradesh (15%): Chhindwara, Khargone and Jhabua districts have converted from jowar and rainfed paddy to maize hybrids since 2010. Tribal-belt cultivation is largely rainfed with yields 22–30 q/ha; commercial pockets in Khargone irrigated reach 50 q/ha.
Bihar (9%): the rabi maize phenomenon. Following kharif paddy, farmers in Gaya, Aurangabad, Nalanda, Begusarai and Khagaria plant maize Oct-15 to Nov-15 and harvest March-April. Irrigated rabi maize on alluvial soils with full Sutlej/Sone canal water routinely yields 65–80 q/ha — among the highest in India. Bihar's rabi maize is now the country's single largest ethanol-grade maize supply.
Tamil Nadu (8%): a story of irrigated borewell-fed maize replacing paddy in Erode, Karur and Salem. Hybrid yields 60–75 q/ha. The TN poultry industry (Namakkal) absorbs nearly all output domestically.
Telangana (8%): Adilabad and Karimnagar irrigated maize in rabi achieves 55–70 q/ha. The state's RBK (Rythu Bharosa Kendra) extension network is considered the most farmer-friendly maize advisory in India.
Maharashtra (8%): Nashik-Ahmednagar belt grows maize for poultry feed and silage; Vidarbha rainfed maize is more marginal at 18–25 q/ha.
Variety selection — duration vs yield trade-off
The 21st-century maize portfolio is essentially hybrid. Public-sector single-cross hybrids from ICAR-IIMR Ludhiana — DHM-117, HQPM-1 (Quality Protein Maize), Vivek QPM-9 for hills, and the older Hi-Maize series — coexist with private-sector hybrids led by Pioneer 3522, Dekalb DKC-9108, Syngenta NK-6240 and Bayer's Bayer 9220. For Karnataka kharif, DHM-117 and Pioneer 3522 dominate; for Bihar rabi, Pioneer 3522 and Syngenta NK-6240 dominate; for Punjab spring (Mar-15 planting) PMH-1 is the university-recommended option from PAU Ludhiana. Quality Protein Maize (QPM) hybrids, led by HQPM-1, are pushed under PM-POSHAN for the mid-day-meal supply chain and command a small ₹100/q premium in tribal-belt procurement.
Duration matters because it determines the cropping system. A 90-day hybrid (Vivek QPM-9, Bio-9544) lets a farmer fit maize + wheat + summer moong in a single calendar year — the so-called "triple cropping" pattern that drives Punjab and Haryana borewell economics. A 110-day hybrid (Pioneer 3522) maximises yield but locks up the field longer.
Sowing window, seed rate and crop establishment
For kharif maize, the sowing window is the most yield-sensitive variable. ICAR-IIMR recommends June-15 to July-15 across most of the country; each 10-day delay beyond July-20 cuts yield by roughly 4–6 q/ha because tasseling shifts to the rainier August window with reduced sunlight and higher fall-armyworm pressure. The seed rate is 18–22 kg/ha at 60 × 20 cm spacing for hybrid maize — about 75,000 plants per hectare. Bihar and Telangana rabi planters frequently push to 85,000 plants/ha (60 × 18 cm) for irrigated high-input maize, where the marginal extra plant pays for itself.
Seed treatment: Imidacloprid 600 FS at 6 ml/kg seed protects against shoot fly and early stem borer for the first 25–30 days. For Pythium and Fusarium damping-off in heavy soils, add Trichoderma viride at 4 g/kg seed.
Nutrient management — NPK and beyond
Maize is a heavy feeder. ICAR-IIMR's blanket recommendation for irrigated hybrid maize is 150:75:60 kg/ha N:P:K, often supplemented with 25 kg/ha zinc sulphate on alluvial and Vertisol soils where Zn deficiency is endemic. Nitrogen application is split — 20% as basal, 40% at knee-high stage (V6), 30% at tasseling (VT), 10% at silking — with the knee-high split being the highest-leverage timing. For rabi maize on irrigated alluvium in Bihar, farmers regularly apply 200:80:80 to chase 80 q/ha yields. STCR (Soil Test Crop Response) targeting is now available from ICAR-IISS Bhopal and should be preferred over blanket schedules for any farm with a recent soil test.
Water management — Kc curve and irrigation scheduling
The FAO-56 Kc curve for maize is Kc-ini 0.30, Kc-mid 1.20, Kc-end 0.60. For a Bihar rabi crop with seasonal ETo of ~560 mm, total crop water demand (ETc) is ~510 mm — typically delivered through 5–7 irrigations of 60–70 mm each on a 12–14 day interval. The most yield-sensitive irrigation windows are tasseling and silking (V14–R1); a single water-stress event of more than 4 days during silking can cut yield by 30–40%. Rainfed kharif maize in Madhya Pradesh's Jhabua and Karnataka's Bellary depends on monsoon distribution; the 2023 drought year saw kharif maize yields in MP-Jhabua collapse to 12 q/ha against the long-term average of 22 q/ha.
Pest and disease management — fall armyworm dominates
Since its first Indian detection in Karnataka-Shivamogga in May 2018, fall armyworm (FAW, Spodoptera frugiperda) has become the single largest biotic threat to Indian maize, displacing the older stem borer (Chilo partellus) in most belts. The ICAR-IIMR ETL is 5% plants infested or 1 fresh egg-mass per 20 plants. Recommended sprays: emamectin benzoate 5SG at 200 g/ha for early instars; chlorantraniliprole 18.5SC at 150 ml/ha for severe outbreaks. Resistance management requires rotating modes of action across the season — a frequent failure point on smallholder farms.
Turcicum leaf blight in humid kharif: prophylactic mancozeb 75WP at 2.5 kg/ha at tasseling protects yield. Pythium stalk rot in heavy irrigation: avoid late evening flooding, ensure drainage.
Cost of cultivation and breakeven economics
The CACP cost-of-cultivation report for 2024-25 (covering 2022-23 crop year, the latest published) places C2 cost for maize at ₹1,758/q on the national average, with wide variation: Karnataka rainfed ₹1,950/q, Bihar irrigated ₹1,510/q, Madhya Pradesh ₹1,620/q. Against the 2025-26 MSP of ₹2,400/q, that yields a C2 margin of 37% on the national average — comfortable on paper, but the procurement gap means most kharif growers in Karnataka and MP realise ₹2,150–2,300/q in the open mandi, compressing the margin to under 20% in low-yield years.
For an irrigated Bihar rabi maize plot yielding 65 q/ha at ₹2,400/q ethanol-buyer rates, gross revenue is ₹1,56,000/ha against a cash cost of ₹52,000/ha — a cash margin of ₹1,04,000/ha (₹42,000/acre). For a Karnataka rainfed kharif maize plot yielding 28 q/ha at ₹2,200/q mandi rate, gross revenue is ₹61,600/ha against a cash cost of ₹28,000/ha — a margin of ₹33,600/ha (₹13,600/acre). The geography of profit in Indian maize is the geography of irrigation plus ethanol.
Procurement, schemes and the role of MSP
Unlike paddy and wheat, maize has no statutory open-ended procurement. NAFED and state agencies buy under PSS (Price Support Scheme) only when prices crash below MSP — and even then only in select districts. In 2023-24, NAFED procured ~7 LMT of maize in Karnataka and Madhya Pradesh combined, against an output of ~14 MT in those states. The ethanol blending push has restructured the maize market: distilleries now bid actively, especially in rabi Bihar/AP, often above MSP. PM-KISAN's ₹6,000/yr cash transfer applies to all maize growers with land records; KCC interest subvention at 4% for ₹3 lakh limit; PMFBY covers maize at modest premium (1.5% kharif, 1.5% rabi).
Climate risk and what is changing
Maize is widely promoted as a "climate-smart" replacement for paddy in Punjab and Haryana — its water footprint of 510 mm is roughly half of paddy's 1,200 mm. But yield variability under monsoon stress remains a concern: 2022 (excess rains in MP), 2023 (deficit rains in Karnataka), and 2024 (FAW outbreak in Bihar pre-flowering) each cut national output by ~2–3 MT. The Bihar rabi maize expansion is the single most important supply-side response: rabi maize is irrigated, ethanol-buyer-supported, and insulated from monsoon variability — a model the Punjab water economist Ashok Gulati (ICRIER) has explicitly recommended scaling.