Unit 2: Crop Production Package of Practices for Kharif Millets

I. Orientation — Kharif Millets and Their Production

Kharif millets are warm-season cereals sown mainly with the onset of the south-west monsoon, generally during June–July, and harvested from September to November. Their short duration, C4 photosynthetic pathway, drought tolerance and ability to produce grain under limited rainfall make them important components of dryland agriculture.

A. Defining characteristics

The production package integrates genotype, environment and crop management to obtain stable grain and fodder yields.

• Season: Cultivation is predominantly rainfed during the monsoon, although protective irrigation can substantially improve establishment and grain filling.
• Adaptation: Most millets tolerate high temperature and intermittent drought better than rice or maize.
• Soil suitability: Well-drained soils are essential; prolonged waterlogging damages roots and reduces plant population.
• Nutritional value: Millet grains supply carbohydrates, protein, minerals, fibre and bioactive compounds; finger millet is especially rich in calcium.
• Cropping role: Millets are grown as sole crops, intercrops and mixed crops with pigeonpea, cowpea, greengram or groundnut.
• Management principle: Timely sowing, optimum plant population, balanced fertilization and early weed control are the main determinants of yield.
• Yield expression: Grain yield is commonly reported in tonnes per hectare (t ha⁻¹) and varies with rainfall, cultivar, soil fertility and production system.

II. Sorghum — A Dual-Purpose Dryland Cereal

Sorghum (Sorghum bicolor (L.) Moench) is a C4 cereal cultivated for grain, fodder, feed and industrial raw material. Kharif sorghum combines drought adaptation with high biomass production but requires careful disease, pest and moisture management.

A. Origin

Sorghum was domesticated in north-eastern Africa, particularly the Ethiopia–Sudan region, from where it spread to Asia and other continents.

• Primary centre: Ethiopia and adjoining north-eastern Africa contain extensive diversity of cultivated and wild sorghums.
• Historical spread: Movement through trade and migration introduced sorghum into India in ancient times and later into Europe, the Americas and Australia.
• Botanical diversity: Major cultivated races include bicolor, guinea, caudatum, kafir and durra; Indian grain sorghums commonly show durra-related characteristics.

B. Geographical distribution

Sorghum is concentrated in semi-arid tropical and subtropical regions receiving variable rainfall.

• World distribution: Important producers include the United States, Nigeria, Sudan, Ethiopia, Mexico and India.
• Indian distribution: Maharashtra, Karnataka, Madhya Pradesh, Telangana, Andhra Pradesh, Rajasthan, Tamil Nadu and Gujarat are major growing states.
• Seasonal pattern: Kharif sorghum is monsoon-grown, whereas post-rainy or rabi sorghum uses stored soil moisture, especially in Maharashtra and Karnataka.

C. Economic importance

Sorghum supports food, livestock and processing industries in water-limited regions.

• Human food: Grain is consumed as roti, porridge, popped grain and fermented products; it is naturally gluten-free.
• Fodder: Stover and green biomass are valuable cattle feed, while sweet sorghum supplies fermentable stalk juice.
• Industry: Grain provides starch, brewing material, poultry feed and bioethanol feedstock.
• Nutritional composition: Grain generally contains about 10–12% protein, substantial starch, dietary fibre and minerals.
• Production caution: Immature or drought-stressed fodder may accumulate hydrocyanic acid; very young crops should not be grazed.

D. Soil and climatic requirements

Sorghum performs best under warm conditions and moderate rainfall on well-drained soils.

• Temperature: Germination and growth are favoured by approximately 25–32°C; frost is harmful.
• Rainfall: About 400–750 mm, properly distributed, is generally adequate for rainfed production.
• Soil: Deep black cotton soils, medium black soils and fertile loams are suitable; a pH of roughly 6.0–8.5 is tolerated.
• Moisture sensitivity: Seedling establishment, flowering and grain filling are critical stages; waterlogging during establishment encourages plant loss.

E. Varieties

Variety selection must match rainfall, maturity duration, grain use and local disease pressure.

• Hybrids: CSH 14, CSH 16, CSH 23 and CSH 25 are examples of improved kharif hybrids with high yield potential.
• Varieties: CSV 15, CSV 17, CSV 20 and CSV 27 are improved selections used in suitable production zones.
• Selection criteria: Farmers should prefer officially recommended cultivars resistant or tolerant to grain mould, shoot fly, downy mildew and lodging.
• Seed quality: Certified seed with high germination and genetic purity helps maintain uniform flowering and harvest maturity.

F. Cultural practices

Timely crop establishment and weed-free early growth are central to kharif sorghum management.

• Land preparation: One deep ploughing followed by two harrowings produces a firm, fine seedbed; drainage channels are needed in heavy soils.
• Sowing: Sow with effective monsoon rainfall, normally in June–July, at about 3–5 cm depth.
• Seed and spacing: Approximately 8–12 kg seed ha⁻¹ is used; common spacing is 45 cm between rows and 12–15 cm between plants.
• Nutrients: A general rainfed recommendation is about 60–80 kg N and 30–40 kg P₂O₅ ha⁻¹, adjusted through soil testing. Apply half the nitrogen and all phosphorus basally, then top-dress remaining nitrogen near 30 days after sowing.
• Weeds: One hoeing or intercultivation at 15–20 days and another near 30–35 days control the critical early competition period.
• Protection: Seed treatment, timely sowing, thinning and field sanitation reduce shoot fly, stem borer, downy mildew and grain mould.
• Harvesting: Harvest when grains are hard and panicles mature; dry produce sufficiently before threshing and storage.

G. Yield

Yield depends strongly on water supply, cultivar and input management.

• Rainfed crop: Improved management commonly produces about 2.0–3.5 t ha⁻¹ of grain.
• Favourable conditions: Hybrids under good fertility and moisture may produce 4.0–5.0 t ha⁻¹.
• By-product: Stover yield often ranges from 6–10 t ha⁻¹, adding substantial feed value.

III. Pearl Millet — A Heat- and Drought-Tolerant Cereal

Pearl millet (Cenchrus americanus, commonly cited as Pennisetum glaucum) is a robust C4 cereal suited to hot, sandy and low-rainfall environments. It is commonly called bajra in India.

A. Origin

Pearl millet originated and was domesticated in the western Sahel region of Africa.

• Centre of diversity: West Africa contains numerous primitive forms and landraces.
• Spread: Cultivation extended across Africa and reached the Indian subcontinent several millennia ago.
• Domestication traits: Selection produced non-shattering earheads, larger grains and compact panicles suited to harvesting.

B. Geographical distribution

Pearl millet occupies some of the driest cereal-growing environments.

• Global range: It is important in India and the Sahelian countries, including Niger, Mali, Senegal, Burkina Faso and Nigeria.
• Indian range: Rajasthan is the leading state; Uttar Pradesh, Haryana, Gujarat, Maharashtra, Madhya Pradesh and Karnataka are also important.
• Production zone: It is prominent where annual rainfall is approximately 250–600 mm and unreliable.

C. Economic importance

Pearl millet supplies food and fodder where other cereals frequently fail.

• Food: Grain is made into roti, porridge, fermented foods and malted products.
• Nutrition: It contains roughly 10–12% protein and is a useful source of iron, zinc, fibre and energy.
• Livestock value: Green fodder and dry stover support cattle in arid and semi-arid regions.
• Risk buffering: Its rapid growth, deep rooting and short-duration cultivars provide yield under late or erratic monsoons.

D. Soil and climatic requirements

Pearl millet is highly adapted to heat and drought but does not tolerate prolonged waterlogging.

• Temperature: About 25–35°C supports vigorous growth; high temperature tolerance exceeds that of most cereals.
• Rainfall: It can grow under 250–600 mm rainfall, although timely moisture at flowering improves yield.
• Soil: Sandy loams, light-textured soils and alluvial soils with pH approximately 6.0–8.5 are suitable.
• Drainage: Heavy, poorly drained and highly acidic soils are unsuitable because root aeration and establishment decline.

E. Varieties

Cultivars should combine early maturity, downy mildew resistance and adaptation to the target zone.

• Hybrids: HHB 67 Improved, GHB 558, RHB 173 and 86M86 are examples cultivated in appropriate regions.
• Open-pollinated varieties: ICTP 8203, commonly known as Dhanshakti, and ICMV 221 are notable improved populations.
• Choice: Early cultivars suit low-rainfall areas, while medium-duration types exploit longer moisture availability.
• Seed renewal: Hybrid seed must be replaced regularly because saved seed loses hybrid uniformity and vigour.

F. Cultural practices

A uniform stand established immediately after dependable rainfall is essential.

• Seedbed: Prepare a fine, firm and weed-free seedbed; use ridges, furrows or conservation furrows where runoff is significant.
• Sowing: Sow in June–July at 2–4 cm depth using approximately 3–5 kg seed ha⁻¹.
• Spacing: A common arrangement is 45 cm × 10–15 cm; wider rows may be used in very dry zones.
• Nutrients: About 40–60 kg N and 20–30 kg P₂O₅ ha⁻¹ may be applied under rainfed conditions, with higher rates under favourable moisture and soil-test guidance.
• Thinning: Thin at 10–15 days after emergence to retain one healthy plant per hill.
• Weeds: Intercultivate or hand-weed around 15–20 and 30–35 days after sowing.
• Protection: Resistant cultivars, seed treatment, crop rotation and removal of infected plants help manage downy mildew, smut and ergot.
• Harvesting: Cut mature earheads when grains become firm, dry them, thresh and reduce grain moisture before storage.

G. Yield

Improved pearl millet responds strongly to rainfall distribution and fertility.

• Rainfed yield: Grain yield commonly ranges from 1.5–2.5 t ha⁻¹.
• High-input yield: Suitable hybrids under favourable moisture may exceed 3.0–4.0 t ha⁻¹.
• Fodder yield: Dry stover frequently contributes about 4–7 t ha⁻¹.

IV. Finger Millet and Other Minor Millets — Nutrient-Rich Climate-Resilient Cereals

Finger millet (Eleusine coracana), or ragi, and minor millets such as foxtail, little, proso, barnyard and kodo millet are short-duration cereals adapted to rainfed, upland and tribal farming systems.

A. Origin

Finger millet and minor millets have distinct centres of domestication.

• Finger millet: It originated in eastern Africa, probably the Ethiopia–Uganda region, and later spread to India.
• Foxtail millet: Setaria italica was domesticated in East Asia, particularly China.
• Proso millet: Panicum miliaceum has an ancient Central or East Asian association.
• Indian millets: Little millet (Panicum sumatrense) and kodo millet (Paspalum scrobiculatum) have strong domestication and diversity links with India.

B. Geographical distribution

These crops occur mainly in Asian and African rainfed environments.

• Finger millet: India, Uganda, Kenya, Tanzania, Nepal and Sri Lanka are important cultivation areas.
• Indian states: Karnataka is the principal finger-millet state, followed by Tamil Nadu, Uttarakhand, Odisha, Andhra Pradesh, Maharashtra and Jharkhand.
• Minor millets: Madhya Pradesh, Chhattisgarh, Odisha, Karnataka, Tamil Nadu, Uttarakhand and tribal hill regions maintain substantial cultivation.

C. Economic importance

Finger and minor millets strengthen household nutrition, fodder supply and resilience.

• Nutrition: Finger millet contains about 300–350 mg calcium per 100 g grain, while minor millets provide fibre, minerals and slowly digestible carbohydrates.
• Food products: Grain is used for roti, porridge, malt, beverages, steamed foods and value-added flour.
• Storage: Properly dried finger millet stores well because its small grain and seed-coat characteristics reduce deterioration.
• Farm role: Short duration and low input requirements make minor millets useful as contingency and catch crops.

D. Soil and climatic requirements

The group tolerates relatively poor soils, but species differ in moisture adaptation.

• Finger millet: It grows well at 20–30°C with about 500–1,000 mm rainfall on red loams, laterites and well-drained soils.
• Minor millets: Foxtail and proso millet favour dry uplands; barnyard millet tolerates cooler hill conditions; kodo and little millet perform on marginal soils.
• Soil reaction: Most types grow around pH 5.0–7.5, though local landraces may tolerate wider ranges.
• Constraint: Waterlogging is generally harmful, particularly during establishment.

E. Varieties

Locally recommended, duration-matched varieties give the most dependable results.

• Finger millet: GPU 28, GPU 45, GPU 67, CO 15 and VL Mandua 352 are examples of improved varieties.
• Foxtail millet: SiA 3156, SiA 3085 and HMT 100-1 are recognised selections.
• Little and kodo millet: OLM 203, JK 8, JK 48 and GPUK 3 represent improved materials for suitable zones.
• Barnyard millet: VL 172 and VL 207 are examples adapted to hill production.

F. Cultural practices

Management aims to secure a dense stand, suppress early weeds and use limited nutrients efficiently.

• Establishment: Finger millet may be direct-sown or transplanted from 20–25-day-old seedlings; minor millets are generally direct-sown.
• Seed rate: Direct-sown finger millet commonly requires 8–10 kg ha⁻¹; line-sown minor millets generally require about 8–12 kg ha⁻¹.
• Spacing: Finger millet is commonly spaced near 22.5–30 cm × 7.5–10 cm; minor-millet rows are often 25–30 cm apart.
• Nutrients: Approximately 40–60 kg N and 20–30 kg P₂O₅ ha⁻¹ benefits finger millet; minor millets usually receive lower, soil-test-based rates.
• Weeds: Two weedings or intercultivations around 15–20 and 30–35 days are important because seedlings initially grow slowly.
• Protection: Seed treatment, resistant varieties and sanitation help manage blast in finger millet and smuts in minor millets.
• Harvesting: Harvest when earheads or panicles turn brown and grains become hard; dry thoroughly before threshing.

G. Yield

Yield varies by species, rainfall and management intensity.

• Finger millet: Rainfed crops commonly yield 1.5–2.5 t ha⁻¹; improved irrigated or well-managed crops may reach 3.0–4.0 t ha⁻¹.
• Minor millets: Grain yield generally ranges from 0.8–1.5 t ha⁻¹, with improved management occasionally producing about 2.0 t ha⁻¹.
• Biomass value: Straw is commonly used as livestock feed, increasing the total value of these crops in mixed farming systems.