Maize Farming in Nepal: Complete Guide to Corn (मकै) Cultivation

Maize (Zea mays) — known as मकै (Makai) in Nepali — is Nepal's second most important grain crop after rice. It is grown from the lowland Terai to the mid-hills above 2,000 meters elevation, making it Nepal's most geographically versatile crop. Maize feeds families, fuels poultry farms, and provides income to over 1.5 million farming households across Nepal's 77 districts.

Maize in Nepal: Economic and Agricultural Importance

Maize occupies approximately 900,000 hectares in Nepal — second only to rice. Average yield is around 2.6 t/ha nationally, though irrigated Terai plots with improved varieties and management can yield 7–10 t/ha. The gap between current and potential yield represents the biggest opportunity in Nepal's agriculture today.

• Total area: ~900,000 hectares (MALD, 2024)
• Annual production: ~2.3 million metric tonnes
• Contribution to agricultural GDP: ~8%
• Primary uses: human food (dough, popcorn), animal feed (poultry, livestock), and industrial starch
• Nepal's fastest growing agri-sector: poultry demand for maize grows 15–20% annually

Best Maize Varieties for Nepal (मकैका जातहरू)

Variety selection is critical. Nepal grows both open-pollinated varieties (OPVs) and hybrids, each with distinct attributes: yield level, maturity duration, stress tolerance, and cost.

Rampur Composite — bred at NARC's Rampur Agriculture Research Station — is the most widely grown OPV in Nepal because farmers can save its seed for the next season. Hybrid varieties like Purnea offer significantly higher yields but require purchasing fresh seed annually. For commercial poultry-feed maize production in the Terai, hybrids are strongly preferred.

Maize Farming Calendar (मकै बाली क्यालेन्डर)

Maize has a wide planting window in Nepal — one of the advantages over rice, which is strictly tied to monsoon timing.

Seed Rate and Plant Spacing (बीउ दर र दूरी)

Correct population density is the foundation of good maize yields. Too few plants = low yield; too many = competition for light, water, and nutrients.

• Seed rate: 25 kg per hectare (25 केजी प्रति हेक्टर)
• Row spacing: 75 cm (between rows)
• Plant spacing: 25 cm (between plants within a row)
• Plant population target: ~53,000 plants per hectare
• 2–3 seeds per hill; thin to 1 plant at 2-leaf stage (14–16 DAS)
• Seed depth: 4–5 cm — shallow planting causes poor emergence in dry soil

Water and Irrigation (सिँचाइ)

Maize has a MEDIUM water requirement compared to rice — this is one of its key advantages for water-scarce regions. However, it is highly sensitive to water stress at two specific stages: tasseling/pollination (silking) and grain filling. Drought during these stages can reduce yield by 50–70%.

• Critical watering periods: tasseling (VT stage) and grain filling (R3–R5)
• Total water requirement: 400–700 mm per season depending on temperature
• Most Terai maize is rainfed — supplement irrigation during dry spells in April–May for early season crop
• Do NOT grow maize in waterlogged fields — roots suffocate within 48 hours of flooding
• Sandy loam soils with good drainage are ideal for maize

Fertilizer Management for Maize (मकैको मल व्यवस्थापन)

Maize is a heavy feeder, particularly for nitrogen. Under-fertilization is the most common cause of yield gaps in Nepal's smallholder maize farms.

Common Maize Pests and Diseases (कीरा र रोगहरू)

Fall Armyworm (FAW) — Spodoptera frugiperda — is currently the most destructive new pest threat to Nepali maize, having arrived from Africa via India in 2019. It can cause 30–70% yield loss if unmanaged. Early detection and action are critical.

• Fall Armyworm (FAW / फल आर्मीवर्म): Check whorl leaves for feeding damage and frass — spray Emamectin Benzoate at early infestation, at the dose on the product label
• Maize Stem Borer (Chilo partellus): Dead heart in young plants — destroy stubble and crop residues after harvest; if chemical control is needed, use only an insecticide currently registered in Nepal, at the dose on its label, and ask your local Agriculture Knowledge Centre
• Maize Downy Mildew (Peronosclerospora spp.): Systemic disease causing striping — use resistant varieties and Metalaxyl seed treatment
• Corn Smut (Ustilago maydis): Galls on ears and tassels — remove and destroy infected tissue
• Leaf Blight (Turcicum blight): Brown elongated lesions — use resistant hybrids and avoid excessive nitrogen

Crop Rotation After Maize (मकै पछि के लगाउने?)

Maize fits excellently in Nepal's traditional crop rotation patterns. The primary rotations are:

• Maize → Rice (Terai): Early maize harvested in August makes way for transplanted rice in the same season
• Maize → Wheat (Terai and Hills): Maize harvested in September/October, wheat sown immediately
• Maize → Potato (Hills): Common in mid-hills where potato follows summer maize
• Maize → Mustard (Terai): Fast-growing oilseed after early maize harvest

Harvesting and Storage (कटनी र भण्डारण)

Maize should be harvested when the husk has dried and turned brown, and the black layer has formed at the base of each kernel (physiological maturity). Harvesting too early results in poor drying and aflatoxin contamination risk.

• Harvest at 25–30% grain moisture; dry to 12–13% before storage
• Shelling too early (>14% moisture) causes fungal contamination
• Use metal silos or plastic hermetic bags for storage to prevent weevil damage
• Aflatoxin (produced by Aspergillus mold) is a major concern in improperly dried maize — test grain before selling for poultry feed
• Properly dried maize can be stored for 8–12 months without significant loss