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🍲Lentil and Field Pea -- Essential Rabi Pulses

Complete guide to lentil (masoor) and field pea cultivation covering Microsperma vs Macrosperma types, tenderometer, Aparna (1st dwarf pea), varieties, and exam-focused tables for AFO and NABARD.

In the previous lessons, we covered chickpea (King of Pulses, Rabi) and pigeonpea (mini fertiliser crop, Kharif). Now we turn to two more essential Rabi pulses: lentil (masoor) and field pea — crops that frequently appear together in exam papers.

The optical “lens” was not named after a physics concept — it was named after the lentil seed. The biconvex shape of the lentil (Lens esculentum) inspired the Latin name for the glass lens we use today. As one of the oldest cultivated crops (8,000-9,000 years of history), lentil has sustained human civilisations from the Fertile Crescent to the Indo-Gangetic plains. Today, it remains a vital Rabi pulse across India’s dryland belts, often grown on residual moisture after rice or as an intercrop with wheat and barley.

This lesson covers:

  1. Lentil basics — Microsperma vs Macrosperma types, origin, and the “lens” trivia
  2. Lentil cultivation — climate, sowing, nutrient management, and intercropping
  3. Field pea basics — botanical link to Mendel’s genetics, field vs garden pea
  4. Field pea cultivation — tenderometer, sowing, and varieties
  5. Key varieties — Type 163 (1st pea), Rachna (1st powdery mildew resistant), Aparna (1st dwarf)

All sections are high-yield for IBPS AFO, NABARD, and FCI exams.


Lentil (Masoor) — Basics

Lentil (masoor) plant with pods in a field
Lentil (masoor) — one of the oldest cultivated pulse crops

Lentil is among the simplest pulses to cultivate — it requires minimal irrigation, thrives on residual moisture, and has a short crop duration. These characteristics make it ideal for the dryland Rabi belts of Uttar Pradesh, Madhya Pradesh, and Bihar.

ParameterDetail
Botanical nameLens esculentum / Lens culinaris
FamilyPapilionaceae (Leguminoceae)
OriginEgypt, Asia Minor (Fertile Crescent region)
HistoryOne of the oldest cultivated crops (8,000-9,000 years)
Other namesCover crop (low, spreading canopy protects soil from erosion), Dryland crop (minimal irrigation)
  • As a legume, lentil fixes atmospheric nitrogen through Rhizobium bacteria, benefiting soil health.

NOTE

Lentil trivia for exams: The optical “lens” was named after lentil seeds (Lens esculentum) due to their similar biconvex shape. Lentil is among the oldest domesticated crops.


Microsperma vs Macrosperma

Lentil is classified into two distinct types based on seed size — a distinction that exams test frequently. In India, the Microsperma type dominates cultivation, while Macrosperma is primarily grown for export markets.

FeatureMicrosperma (Masuri)Macrosperma (Masur)
Seed sizeSmall (2-6 mm), convexLarge (6-9 mm), flat
Seed coatDarkerLighter
Cotyledon colourOrange-redYellow to green
Predominance in IndiaYes — main type cultivatedLess common, mostly exported

Climate and Cultivation

Lentil is strictly a cool-season Rabi crop that performs best under mild winter temperatures. Unlike chickpea which tolerates some drought stress, lentil is more sensitive to both excess moisture (causes root rot) and terminal heat stress (hastens maturity, reduces seed filling).

ParameterValue
SeasonRabi (cool-season crop)
Sowing timeLast week of October to 2nd week of November
Best soilLight loam, alluvial (good drainage, adequate moisture retention)
Seed rate30-40 kg/ha (late sowing: 50-60 kg/ha for compensation)
Spacing30 x 5 cm
Sowing depth3-5 cm
Irrigations1-3 (low water requirement; sensitive to excess moisture)
Harvest100-120 days after sowing (pods turn brown, seeds rattle inside)
Yield15-20 q/ha

Critical Irrigation Stages

StageTimingImpact of Stress
Flower initiation40-45 DASReduces flower number and pod count
Pod formation70-80 DASPoor seed filling, lighter seeds

Nutrient Management

Like all legumes, lentil fixes its own nitrogen and needs only a starter dose. The nutrient strategy prioritises phosphorus for nodulation and zinc for grain quality.

  • NPK: 20 : 50 : 20 kg/ha at sowing in furrows.
  • Foliar spray: ZnSO4 0.5% + Lime 0.25% in the standing crop.
  • Low nitrogen (20 kg/ha) is a starter dose — the crop meets most N needs through biological fixation.
  • Zinc improves grain quality and enzyme function; lime corrects micronutrient availability.

Intercropping and Weed Management

Lentil’s low, spreading canopy and slow initial growth make it both an excellent intercrop partner (adds nitrogen, covers soil) and vulnerable to weed competition in the early growth phase.

  • Lentil is intercropped with wheat, barley, linseed, and safflower — provides nitrogen enrichment to the companion crop and maximises land use efficiency.
  • Weed management: Fluchloralin @ 1.0 kg a.i./ha (pre-plant incorporated) followed by one hand weeding at 30 DAS.

Important Lentil Varieties

Lentil varieties are classified by the Microsperma-Macrosperma distinction. Exam questions typically ask about the variety type rather than individual variety names.

TypeVarieties
MicrospermaHUL 57, Pant L 6, 7, VL Masoor 125, 126, Pusa Vaibhav
MacrospermaPL 5, IPL 406, DPL 62, WBL 58, K 75, Sapna, Priya, Garima, Subrata, Sheri, Jawahar Lentil 3
  • Other common varieties: JL-3, Pant L-639, 209, 406, IPL-81, DL-62, Lens 4076.

Field Pea — Basics

Field pea plant with pods and tendrils
Field pea (Pisum sativum) — Mendel’s experimental organism and an important Rabi pulse

Field pea shares many characteristics with lentil — both are cool-season Rabi pulses with hypogeal germination. However, field pea is historically significant as the organism Gregor Mendel used for his foundational genetics experiments, and it brings unique exam topics like the tenderometer and the Aparna (first dwarf) variety.

ParameterDetail
Botanical namePisum sativum var. arvense (field pea) / var. hortense (garden pea)
FamilyPapilionaceae (Leguminoceae)
Chromosome2n = 14 (same chromosome number used by Gregor Mendel in his genetics experiments)
OriginMediterranean region of Southern Europe and Western Asia
Protein22%
Carbohydrate60%
Fat1.8%

Field Pea vs Garden Pea

FeatureField Pea (var. arvense)Garden Pea (var. hortense)
UseDry seeds for dal/flourGreen pods as vegetable, canning
Harvest stageMature dry podsGreen, tender pods
Seed rate75-80 kg/ha100-120 kg/ha
Yield20-25 q/ha80-100 q/ha (fresh green, high moisture)

Climate (Field Pea)

Field pea requires cooler temperatures than most Kharif pulses and is highly sensitive to humidity (promotes fungal diseases). This climate profile explains why it is strictly a Rabi crop in India.

ParameterRequirement
SeasonRabi (cool growing season)
Germination temperature~22 C
Growth temperature13-18 C
Water requirement400-600 mm
PhotoperiodShort-day plant
Frost sensitivityDamages flowers and young pods
HumidityHarmful — promotes powdery mildew, rust, and fungal diseases
Heavy rain at floweringCauses flower drop and poor pollination

NOTE

Late sowing warning: Sowing after October causes drastic yield reduction because higher temperatures during the reproductive phase reduce pod setting and seed filling.


Soil (Field Pea)

Soil requirements for field pea are more specific than for lentil — pea is particularly intolerant of waterlogging and acidic conditions.

  • Well-drained loam soil is best. Pea is highly sensitive to waterlogging — even brief periods of standing water cause root rot and yellowing.
  • Optimum pH: 6.5 (maximises nutrient availability and Rhizobium activity). Below pH 5.5, nodulation is severely inhibited.

Sowing and Seed Treatment

Timely sowing is critical for field pea because late planting exposes the reproductive phase to rising temperatures, causing drastic yield reduction through flower drop and poor seed filling.

ParameterValue
Sowing time2nd fortnight of October (Rabi)
Spacing30 x 10 cm
Seed treatmentCaptan/Thiram @ 2.5 g + Rhizobium leguminosarum 10 g per kg seed
Irrigation1-2 irrigations
GerminationHypogeal

Tenderometer

  • Maturity of pea is measured by Tenderometer — it measures seed tenderness/firmness by the force required to crush a sample of peas. Lower readings = tender, immature (ideal for canning and freezing at 95-105 tenderometer units); higher readings = mature, starchy (for pulse/dal at 120+ units). This instrument is unique to pea among all pulses and is a frequently tested exam fact.
Tenderometer instrument used to measure pea maturity and seed firmness
Tenderometer — measures pea seed tenderness to determine harvest maturity

Critical Stages and Nutrient Management

Field pea responds well to irrigation at two critical stages. Missing irrigation at these windows causes significant yield losses that cannot be recovered later.

StageTimingManagement
Flower initiation40-45 DASIrrigate for maximum flower production
Pod filling70-80 DASIrrigate for plump, well-filled seeds
  • Nutrient dose: 20 : 50 : 30 : 40 kg NPKS/ha. Sulphur (40 kg/ha) improves protein quality and enhances Rhizobium activity.
  • Weed management: Two hand weedings at 30 and 45 DAS (pea is slow-growing initially, vulnerable to weed competition in first 40-50 days).

Varieties

Field pea and garden pea have distinct variety lineups reflecting their different end-uses. Focus on the “firsts” — Type 163 (first pea variety), Aparna (first dwarf), and Rachna (first powdery mildew resistant).

TypeKey Varieties
Field peaAparna (1st dwarf variety — less lodging), Ambika, Rachana, T-65, 163, Hans, KP-885, Pant C5
Garden peaArkel (sickle-shaped pods, early maturity), Bonvilley, Sylvia (whole pod edible — snap pea), Early Bajer, Early December, Pant Matar-1, 5, 6, 8, Aajad Matar-1, Pant Uphar

Diseases

Common diseases of field pea including powdery mildew
Field pea diseases — powdery mildew is the most important fungal disease

Field pea is susceptible to several fungal diseases, particularly under humid conditions. Powdery mildew is the most important disease and has driven significant variety development efforts.

DiseaseCausal AgentKey Facts
Powdery MildewErysiphe pisiMost important disease; white powdery coating on leaves, stems, and pods. Resistant varieties: Rachna (1st resistant), Shikha, Malviya Matar, Ambika
RustUromyces fabaeBrown pustules on leaves; favoured by humid, cool weather
WiltFusarium oxysporum f. sp. pisiYellowing and wilting; managed by crop rotation and resistant varieties
Root RotRhizoctonia solaniCaused by waterlogging; avoid poorly drained fields

Yield and Harvest

Yield varies dramatically between field pea (harvested as dry grain) and garden pea (harvested as fresh green pods with high moisture content). The apparent higher yield of garden pea reflects water weight, not higher productivity.

TypeYield
Field pea (grain)20-25 q/ha
Garden pea (fresh green)80-100 q/ha
  • Harvest when stems and pods turn straw/light brown and seeds rattle within pods.
  • Shelling percentage: 49% (about half the pod weight is grain).

Important Pea Varieties

These varieties are frequently asked in AFO, NABARD, and IBPS SO papers. Focus on the “firsts” and disease-resistance categories.

VarietySpecial Characteristics
Type 1631st pea variety
Rachna1st powdery mildew resistant variety of field pea
Aparna1st dwarf variety of field pea
Pusa Prabhat, Pusa Pana, ShubhraExtra early variety
Uttara, SapnaDwarf varieties
Shikha, Malviya Matar, AmbikaPowdery mildew resistant
HarbajanEarly maturing variety

Summary Table — Lentil and Field Pea at a Glance

ParameterLentilField Pea
Botanical nameLens culinarisPisum sativum var. arvense
FamilyPapilionaceaePapilionaceae
Chromosome2n = 142n = 14
OriginEgypt, Asia MinorMediterranean
Protein~25%22%
SeasonRabiRabi
PhotoperiodLong-dayShort-day
Water requirementLow (1-3 irrigations)400-600 mm
Seed rate30-40 kg/ha75-80 kg/ha
Sowing timeOct-Nov2nd fortnight of October
GerminationHypogealHypogeal
Harvest days100-120 DASVaries by type
Yield15-20 q/ha20-25 q/ha (grain); 80-100 q/ha (green)
Shelling %49%
1st varietyType 163
1st dwarf varietyAparna
Maturity measurementTenderometer
Lens triviaNamed the optical lensUsed by Mendel for genetics

Summary Cheat Sheet

Concept / TopicKey Details
Lentil botanical nameLens culinaris / Lens esculentum
Lentil originEgypt, Asia Minor — one of oldest crops (8,000-9,000 years)
Lens triviaOptical lens named after lentil seed shape
MicrospermaSmall (2-6 mm), dark, orange-red cotyledon — main Indian type
MacrospermaLarge (6-9 mm), flat, lighter — mostly exported
Lentil seed rate30-40 kg/ha (late: 50-60 kg/ha)
Lentil yield15-20 q/ha
Field Pea botanical namePisum sativum var. arvense
Field Pea chromosome2n = 14 (used by Mendel for genetics)
Field Pea protein22%; carbohydrate 60%
Field Pea photoperiodShort-day plant
TenderometerMeasures pea seed tenderness/firmness for harvest timing
Type 1631st pea variety
Rachna1st powdery mildew resistant field pea variety
Aparna1st dwarf variety of field pea
Germination (both)Hypogeal
Lentil critical stagesFlower initiation (40-45 DAS), Pod formation (70-80 DAS)
Lentil weed herbicideFluchloralin @ 1.0 kg a.i./ha (pre-plant)
Pea shelling %49%
Pea optimum pH6.5

TIP

Next: Lesson 4 covers the Vigna trio — Mungbean, Urdbean, and Moth Bean — short-duration pulse crops with the highest protein (mungbean at 24%) and the most drought-tolerant kharif pulse (moth bean).

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