🌻 Oilseed Crops
Cultivation of groundnut, mustard, soybean, sunflower, and sesame for CUET Agriculture
India is the 4th largest oilseed-producing country in the world and the 2nd largest consumer of edible oils. Despite significant domestic production, India imports a large quantity of edible oils (mainly palm oil and soybean oil) to meet its demand. The major oilseed crops include groundnut, mustard, soybean, sunflower, and sesame — each with unique characteristics and cultivation requirements.
- Technology Mission on Oilseeds (TMO): Launched in 1986 to achieve self-sufficiency in edible oils — this led to the Yellow Revolution, a dramatic increase in oilseed production in India. The Yellow Revolution is associated with Sam Pitroda.
- National Mission on Oilseeds and Oil Palm (NMOOP): The current government scheme for promoting oilseed production, including oil palm cultivation in north-eastern and coastal states.
NOTE
The Yellow Revolution (1986) transformed India's oilseed sector. Before TMO, India was heavily dependent on imports. The mission promoted improved varieties, better agronomic practices, and price support, leading to a near-doubling of oilseed production within a decade.
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India is the 4th largest oilseed-producing country in the world and the 2nd largest consumer of edible oils. Despite significant domestic production, India imports a large quantity of edible oils (mainly palm oil and soybean oil) to meet its demand. The major oilseed crops include groundnut, mustard, soybean, sunflower, and sesame — each with unique characteristics and cultivation requirements.
- Technology Mission on Oilseeds (TMO): Launched in 1986 to achieve self-sufficiency in edible oils — this led to the Yellow Revolution, a dramatic increase in oilseed production in India. The Yellow Revolution is associated with Sam Pitroda.
- National Mission on Oilseeds and Oil Palm (NMOOP): The current government scheme for promoting oilseed production, including oil palm cultivation in north-eastern and coastal states.
NOTE
The Yellow Revolution (1986) transformed India's oilseed sector. Before TMO, India was heavily dependent on imports. The mission promoted improved varieties, better agronomic practices, and price support, leading to a near-doubling of oilseed production within a decade.
1. Groundnut (Arachis hypogaea)
Groundnut is India's most important oilseed crop by area and is unique among oilseeds because it also belongs to the legume family (Fabaceae), meaning it fixes nitrogen like pulses. Its most distinctive feature is geocarpy — the phenomenon where flowers form above ground but pods develop underground.
| Parameter | Details |
|---|---|
| Family | Fabaceae (Leguminosae) |
| Origin | South America (Brazil) |
| Chromosome number | 2n = 40 (allotetraploid) |
| Type | Kharif (mainly); also Rabi/Summer; self-pollinated; C3 plant |
| India's rank | 2nd largest producer (after China) |
| Top states | Gujarat (largest, ~40%), Rajasthan, AP, Tamil Nadu, Karnataka |
| Oil content | 44-50% |
Climate and Soil:
- Temperature: 25-30 °C; a warm weather crop that is sensitive to frost.
- Rainfall: 50-75 cm; should be well-distributed. Excess rain during pod maturity causes germination in the soil (sprouting of seeds inside pods).
- Soil: Well-drained sandy loam is essential — light, loose soils are critical because the peg (a stalk-like structure from the flower) must penetrate the soil to form pods underground. Heavy clay soils resist peg penetration and cause misshapen pods. The ideal pH is 6.0-7.0, and soils rich in calcium and available sulphur improve pod quality and oil content.
Types:
- Bunch/Erect (Valencia, Spanish types) — Short duration, compact plant habit; grown in Kharif season
- Spreading/Runner (Virginia types) — Long duration, spreading branches; grown in Rabi/Summer season
Cultivation:
| Practice | Details |
|---|---|
| Seed rate | Bunch: 80-100 kg/ha; Spreading: 60-80 kg/ha |
| Spacing | Bunch: 30 x 10 cm; Spreading: 45 x 15 cm |
| Sowing time | Kharif: June-July; Rabi: November-December |
| Fertilizer (NPK) | 20-40-40 kg/ha + Gypsum 250-500 kg/ha at pegging |
| Rhizobium | Seed inoculation recommended (it is a legume!) |
| Critical stages | Flowering, Pegging, Pod development |
| Duration | Bunch: 100-120 days; Spreading: 130-150 days |
| Yield | 15-25 q/ha (pods) |
IMPORTANT
Geocarpy is groundnut's most distinctive feature: After pollination, the fertilized ovary develops a stalk-like structure called a peg that grows downward into the soil. The pod then develops and matures underground. This is why sandy, loose soils are essential — the peg must physically penetrate the soil. Gypsum (calcium sulphate) is applied at the flowering/pegging stage to supply calcium directly to the developing pod zone, which dramatically improves pod filling and oil content.
Key Points:
- Tikka disease (Cercospora leaf spot) and stem rot (Sclerotium rolfsii) are major diseases
- Aflatoxin contamination by the fungus Aspergillus flavus is a serious post-harvest concern. Aflatoxins are carcinogenic and can contaminate stored groundnuts, especially in humid conditions. Proper drying to <8% moisture is essential.
Varieties: TG-37A, TAG-24, ICGS-76, GG-20, TMV-2, Kadiri-6
2. Mustard / Rapeseed (Brassica juncea / B. campestris)
Mustard is India's most important Rabi oilseed crop and the backbone of edible oil production in northern India, particularly Rajasthan. The bright yellow mustard fields in winter are an iconic sight across the Indo-Gangetic Plains. Mustard belongs to the Brassicaceae (Cruciferae) family, characterized by four-petalled cruciform (cross-shaped) flowers.
| Parameter | Details |
|---|---|
| Family | Brassicaceae (Cruciferae) |
| Origin | Central Asia / Mediterranean |
| Chromosome number | B. juncea: 2n = 36 (AABB); B. campestris: 2n = 20 (AA) |
| Type | Rabi crop; self-pollinated (B. juncea) / cross-pollinated (B. campestris); C3 plant |
| India's rank | 3rd largest producer of rapeseed-mustard (after Canada, China) |
| Top states | Rajasthan (largest, ~45%), MP, UP, Haryana, Gujarat |
| Oil content | 35-46% |
Climate and Soil:
- Temperature: 10-25 °C (a cool weather crop). Frost at flowering is harmful — it destroys flowers and reduces seed set.
- Rainfall: 25-40 cm; mustard is largely grown on limited irrigation or conserved moisture.
- Soil: Well-drained loam to sandy loam; pH 6.0-7.5; tolerates mild alkalinity.
Cultivation:
| Practice | Details |
|---|---|
| Seed rate | 3-5 kg/ha (very small seeds, so low seed rate) |
| Spacing | 30-45 x 10-15 cm |
| Sowing time | October (timely); November (late) |
| Fertilizer (NPK) | 60-40-20 kg/ha + Sulphur 20-40 kg/ha |
| Irrigation | 2-3 irrigations; critical at flowering and pod filling |
| Duration | 120-150 days |
| Yield | 12-20 q/ha |
Key Points:
- Mustard aphid (Lipaphis erysimi) is the most important pest of mustard — it appears in January-February and sucks sap, causing severe damage. Early sowing (before October 15) helps the crop escape aphid infestation because the crop crosses the vulnerable flowering stage before aphid populations peak.
- Sulphur application is essential for mustard — sulphur improves both oil content and seed quality. Mustard is a "sulphur-loving" crop because sulphur is needed for the synthesis of glucosinolates (the compounds that give mustard its pungency).
- Alternaria blight and White rust (Albugo candida) are major diseases.
- Erucic acid — an anti-nutritional fatty acid found in mustard oil. High erucic acid is linked to health concerns. Low-erucic acid varieties (<2%) like Pusa Mustard-28 are being promoted.
- GM Mustard (DMH-11) — India's first GM food crop approved for environmental release in 2022. It is a hybrid mustard developed using the barnase-barstar system for improved yields.
Varieties: Pusa Bold, Varuna (T-59), RH-749, NRCHB-101, Pusa Mustard-28 (low erucic)
3. Soybean (Glycine max)
Soybean is called the "Gold of the Field" or "Miracle Bean" because it is uniquely rich in both oil (18-22%) and protein (38-42%). While its oil content is relatively low compared to other oilseeds, its protein content is the highest among all oilseeds — making it invaluable for both oil extraction and protein-rich animal feed (soy meal).
| Parameter | Details |
|---|---|
| Family | Fabaceae |
| Origin | China (Manchuria) |
| Chromosome number | 2n = 40 |
| Type | Kharif crop; self-pollinated; C3 plant; photoperiod-sensitive (short day) |
| India's rank | 5th largest producer globally |
| Top states | MP (largest, ~55%), Maharashtra, Rajasthan, Karnataka |
| Oil content | 18-22% |
| Protein content | 38-42% (highest among oilseeds) |
Climate and Soil:
- Temperature: 25-30 °C; requires warm and moist weather. Soybean is a short-day plant — it flowers when day length decreases below a critical threshold. This photoperiod sensitivity is why soybean performs best as a Kharif crop sown at the onset of monsoon.
- Rainfall: 60-100 cm; well-distributed rainfall is needed.
- Soil: Well-drained loam to clay loam; pH 6.0-7.5.
Cultivation:
| Practice | Details |
|---|---|
| Seed rate | 60-80 kg/ha |
| Spacing | 45 x 5-7 cm |
| Sowing time | June-July (with onset of monsoon) |
| Fertilizer (NPK) | 20-60-40 kg/ha + Bradyrhizobium japonicum inoculation |
| Duration | 90-120 days |
| Yield | 15-25 q/ha |
IMPORTANT
Soybean uses a different nitrogen-fixing bacterium than other legumes: it requires Bradyrhizobium japonicum (NOT the common Rhizobium). This is a frequently tested distinction. If soybean is being grown in a field for the first time, inoculation with Bradyrhizobium japonicum is essential because the bacteria may not be naturally present in the soil.
Key Points:
- Highest protein content (38-42%) among all oilseeds — this is why it is called the "Miracle Bean"
- Major processed products: soy meal (animal and poultry feed — this is the primary economic product), soy oil, tofu, soy milk, soy chunks
- Stem fly, girdle beetle, and tobacco caterpillar (Spodoptera litura) are major pests
- Yellow Mosaic Virus (YMV) transmitted by whitefly is the major disease
- MP (Madhya Pradesh) alone accounts for approximately 55% of India's soybean production — the "soybean state" of India
Varieties: JS-335 (most popular), JS-9560, NRC-7, MACS-450, JS-20-34
4. Sunflower (Helianthus annuus)
Sunflower stands out among oilseeds for being photo-thermo insensitive — it can be successfully grown in all three seasons (Kharif, Rabi, and Summer), unlike other oilseeds which are restricted to specific seasons. Its oil is rich in polyunsaturated fatty acids (PUFA), making it one of the healthiest cooking oils.
| Parameter | Details |
|---|---|
| Family | Asteraceae (Compositae) |
| Origin | North America (Mexico/Peru) |
| Chromosome number | 2n = 34 |
| Type | All three seasons; cross-pollinated (by bees); C3 plant |
| Top states | Karnataka (largest), AP, Maharashtra, Tamil Nadu |
| Oil content | 40-50% (high in linoleic acid — good for heart health) |
Climate and Soil:
- Temperature: 20-25 °C; because it is photo-thermo insensitive, sunflower can be grown year-round in suitable climates — a unique advantage.
- Soil: Well-drained loam; pH 6.5-8.0; the deep root system allows it to tolerate moderate drought.
- Sunflower exhibits heliotropism — the developing flower head turns to follow the sun during the growing stage, maximizing light interception. Once flowering is complete, the head typically faces east.
Cultivation:
| Practice | Details |
|---|---|
| Seed rate | 5-8 kg/ha |
| Spacing | 60 x 30 cm |
| Sowing time | All seasons (Kharif/Rabi/Summer) |
| Fertilizer (NPK) | 60-60-40 kg/ha + Boron spray at flowering |
| Pollination | Keep 2-3 beehives/ha for better seed set |
| Duration | 85-100 days |
| Yield | 12-18 q/ha |
TIP
Sunflower is cross-pollinated by bees. Placing 2-3 beehives per hectare in the field during flowering is strongly recommended — poor pollination is the single biggest reason for low sunflower yields. Without adequate bee activity, many florets remain unfertilized, resulting in empty seeds (called "chaffy seeds").
Key Points:
- Photo-thermo insensitive — can be grown in all three seasons (unique among oilseeds). This makes sunflower a flexible crop that can fill gaps in cropping systems.
- Boron deficiency causes poor seed set — boron is critical for pollen tube growth. A foliar spray of borax (0.2%) at flowering is recommended.
- Oil is rich in PUFA (polyunsaturated fatty acids), especially linoleic acid — considered heart-friendly.
- Head rot (Sclerotinia sclerotiorum) and Alternaria blight are major diseases.
Varieties/Hybrids: KBSH-1, MSFH-17, Sunbred-275, PAC-36
5. Sesame / Til (Sesamum indicum)
Sesame is believed to be the oldest oilseed crop known to humanity, with a history of cultivation dating back over 5,000 years. It is called the "Queen of Oilseeds" because of its high oil content (46-52%) and the exceptional quality of its oil, which contains natural antioxidants (sesamol and sesamin) that give it remarkable stability and shelf life.
| Parameter | Details |
|---|---|
| Family | Pedaliaceae |
| Origin | Africa (Ethiopia) — some sources say India |
| Chromosome number | 2n = 26 |
| Type | Kharif; self-pollinated; C3 plant |
| Top states | West Bengal, Rajasthan, MP, Gujarat, Tamil Nadu |
| Oil content | 46-52% |
Climate and Soil:
- Temperature: 25-35 °C; a warm weather, drought-tolerant crop.
- Rainfall: 50-75 cm
- Soil: Well-drained sandy loam to loam; pH 5.5-8.0. Sesame adapts well to a range of soil types.
Cultivation:
| Practice | Details |
|---|---|
| Seed rate | 4-5 kg/ha |
| Spacing | 30-45 x 10-15 cm |
| Sowing time | June-July (Kharif) |
| Fertilizer (NPK) | 40-20-20 kg/ha |
| Duration | 80-95 days |
| Yield | 5-8 q/ha |
Key Points:
- Called "Queen of Oilseeds" — the oldest oilseed crop cultivated by humans, with references in ancient texts across civilizations.
- Contains sesamol and sesamin — powerful natural antioxidants that prevent the oil from turning rancid. This exceptional shelf life makes sesame oil valuable for cooking, cosmetics, and Ayurvedic medicines.
- Phyllody disease (caused by phytoplasma, transmitted by leafhoppers) is the major disease — it converts floral parts into green leafy structures, completely destroying seed production.
- The relatively low yield (5-8 q/ha) is a constraint — sesame is a crop of low-input, marginal farming systems.
Varieties: GT-10, TKG-22, Swetha, Hima
Comparison of Major Oilseeds
| Parameter | Groundnut | Mustard | Soybean | Sunflower | Sesame |
|---|---|---|---|---|---|
| Season | Kharif/Rabi | Rabi | Kharif | All seasons | Kharif |
| Oil content | 44-50% | 35-46% | 18-22% | 40-50% | 46-52% |
| Top state | Gujarat | Rajasthan | MP | Karnataka | West Bengal |
| Origin | S. America | Central Asia | China | N. America | Africa |
| Special | Geocarpy | Yellow Revolution | Miracle Bean | Photo-insensitive | Queen of Oilseeds |
TIP
Oil content ranking (high to low): Sesame (46-52%) > Groundnut (44-50%) > Sunflower (40-50%) > Mustard (35-46%) > Soybean (18-22%). But remember, soybean compensates with the highest protein content (38-42%) among all oilseeds.
Key Points for CUET
Quick Revision — Must-Remember Facts
- Yellow Revolution — Oilseed production through TMO (1986); associated with Sam Pitroda
- Groundnut shows geocarpy — pods develop underground after pegging; gypsum application at pegging is essential
- Soybean has the highest protein content (38-42%) among all oilseeds; uses Bradyrhizobium japonicum (not Rhizobium)
- Sunflower is photo-thermo insensitive — can be grown in all three seasons; needs bee pollination
- Sesame — oldest oilseed crop; "Queen of Oilseeds"; contains natural antioxidants (sesamol, sesamin)
- Mustard: Early sowing avoids aphid; sulphur improves oil quality; GM mustard DMH-11 approved 2022
- Aflatoxin (Aspergillus flavus) is a post-harvest concern in groundnut
- Phyllody (phytoplasma) is the major disease of sesame
- Gujarat is the top groundnut state; Rajasthan is the top mustard state; MP is the top soybean state
Summary Cheat Sheet
| Concept / Topic | Key Details / Explanation |
|---|---|
| India's oilseed rank | 4th largest producer; 2nd largest consumer |
| Yellow Revolution | TMO launched 1986; associated with Sam Pitroda |
| Groundnut | Arachis hypogaea; 2n = 40 (allotetraploid); Fabaceae; Kharif |
| Groundnut — Key feature | Geocarpy — pods develop underground after peg penetrates soil |
| Groundnut — Oil content | 44-50%; top state: Gujarat (~40%) |
| Groundnut — Gypsum | 250-500 kg/ha at pegging — supplies Ca to developing pods |
| Groundnut — Seed rate | Bunch: 80-100 kg/ha |
| Groundnut — Aflatoxin | Aspergillus flavus; post-harvest concern; dry to <8% moisture |
| Mustard | Brassica juncea; 2n = 36 (AABB); Brassicaceae; Rabi |
| Mustard — Oil content | 35-46%; top state: Rajasthan (~45%) |
| Mustard — Seed rate | 3-5 kg/ha (very small seeds) |
| Mustard — Sulphur | 20-40 kg/ha essential; improves oil content and pungency |
| Mustard — Major pest | Mustard aphid (Lipaphis erysimi); early sowing avoids it |
| GM Mustard DMH-11 | India's first GM food crop approved 2022 |
| Soybean | Glycine max; 2n = 40; Fabaceae; Kharif; short-day plant |
| Soybean — Key fact | "Miracle Bean"; protein 38-42% (highest among oilseeds); oil 18-22% |
| Soybean — Rhizobium | Uses Bradyrhizobium japonicum (NOT Rhizobium) |
| Soybean — Top state | MP (~55%); seed rate 60-80 kg/ha |
| Sunflower | Helianthus annuus; 2n = 34; Asteraceae; cross-pollinated by bees |
| Sunflower — Key fact | Photo-thermo insensitive — grows in all 3 seasons |
| Sunflower — Oil content | 40-50%; rich in PUFA (linoleic acid, heart-friendly) |
| Sunflower — Pollination | Keep 2-3 beehives/ha; Boron spray at flowering |
| Sesame | Sesamum indicum; 2n = 26; Pedaliaceae; Kharif |
| Sesame — Key fact | "Queen of Oilseeds"; oldest oilseed crop; oil 46-52% |
| Sesame — Antioxidants | Sesamol + sesamin — exceptional shelf life |
| Sesame — Major disease | Phyllody (phytoplasma, transmitted by leafhoppers) |
| Oil content ranking | Sesame (46-52%) > Groundnut (44-50%) > Sunflower (40-50%) > Mustard (35-46%) > Soybean (18-22%) |
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