Green Gram (Moong) Farming — Organic Quick Guide

Green gram (moong) is one of the fastest-paying legume crops in organic farming — completing its cycle in just 45 days while fixing atmospheric nitrogen that benefits the next crop. With organic moong fetching ₹80–120/kg at premium markets versus ₹60–80/kg conventional, even a modest 400–500 kg/acre yield returns ₹25,000–50,000 net income per acre — making it an ideal short-duration intercrop or fallowing replacement.

Which Varieties Should Organic Farmers Choose?

ML 818: A popular Kharif variety with high yield potential and moderate yellow mosaic virus (YMV) tolerance. Matures in 60–65 days with bold, green seeds that fetch premium prices in dal markets. Best suited to well-drained loamy soils of central Karnataka.

Pant Moong 5: A shorter-duration variety maturing in 45–50 days. Its compact plant type makes it suitable for intercropping with sugarcane or maize. Seed size is slightly smaller but seed quality for dal is excellent.

CO5 (Tamil Nadu): High-yielding variety recommended for South Karnataka and Tamil Nadu border regions. Shows better heat tolerance than ML 818 and produces well in dry Kharif conditions with limited irrigation.

PDM 139 (Samrat): Specifically bred for YMV resistance — critical for Kharif seasons when whitefly pressure is high. Where YMV is endemic on your farm, this variety should be the first choice even if yield is marginally lower than susceptible varieties.

Rhizobium Inoculation — The Key Organic Input

Green gram belongs to the legume family and forms a symbiotic relationship with Rhizobium phaseoli bacteria that fix atmospheric nitrogen into a plant-available form. Commercial Rhizobium inoculant for moong is available from KSDA and private bio-input suppliers.

Seed treatment procedure:

1. Moisten seeds lightly with jaggery solution (50g jaggery dissolved in 500 ml water per 10 kg seed)
2. Mix Rhizobium inoculant (200g per 10 kg seed) and coat uniformly
3. Spread coated seeds in shade for 30 minutes to dry slightly before sowing
4. Sow within 24 hours of inoculation — do not allow seeds to sit in sun

Combine Rhizobium with PSB (Phosphate Solubilising Bacteria) inoculant at the same time — the dual inoculation ensures both nitrogen fixation and phosphorus availability from the first week of root growth.

Sowing and Field Management

• Spacing: 30×10 cm (row-to-row × plant-to-plant) for monocrop; 45×10 cm for intercrop with taller crops
• Seed rate: 8–10 kg/acre; ensure good seed-to-soil contact in moist seedbed
• Sowing time: June–July for Kharif; February–March for summer crop with irrigation
• Basal nutrition: 2 tonnes vermicompost + 100 kg neem cake per acre; no chemical fertiliser needed with Rhizobium

Moong has a short taproot and shallow lateral roots — avoid deep tillage before sowing. One pass with a rotavator to 15 cm is sufficient. Raised-bed sowing in areas with drainage problems prevents root rot during heavy Kharif rains.

Yellow Mosaic Virus (YMV) Management

YMV is the single biggest disease threat to moong in Karnataka. It is transmitted by the whitefly (Bemisia tabaci) and can devastate entire fields within 2 weeks if uncontrolled. There is no cure for infected plants — prevention is everything.

Organic YMV management strategy:

• Variety selection: Plant YMV-resistant varieties (PDM 139, ML 818) as first defence
• Whitefly control: Yellow sticky traps at 10/acre from day 7 to day 45 — whiteflies are attracted to yellow and get trapped before feeding on plants
• Neem oil spray: 5 ml/L at 10-day intervals starting from day 15 — repels whitefly adults and reduces nymph populations on leaf undersides
• Roguing: Remove and bury any plant showing YMV symptoms (golden mosaic on leaves, stunted growth) immediately — every infected plant is a virus reservoir
• Intercropping barrier: Plant rows of maize, jowar, or sunflower as border rows — tall border crops reduce whitefly movement from field edges

Multiple Pickings for Maximum Income

One of the major advantages of moong over crops like black gram is the ability to do multiple green pod pickings before the crop is left to mature fully for dry seed harvest.

• Green pod (sabzi) market: First picking of green pods at 38–42 days (pods are fully elongated but seeds not yet hardened). Green moong pods sell at ₹25–40/kg at vegetable markets and fetch high returns on small plots near towns.
• Second and third pickings: At 45–50 days, another round of green pods can be picked. Plants that are not picked for green pods can be left to mature for dry dal.
• Dry seed harvest: At 55–65 days when 70–80% of pods turn yellow-brown. Pull entire plants and thresh after 2–3 days of sun drying.

Post-Harvest and Soil Benefit

After harvest, incorporate moong stubble and roots back into the soil. The nodules on moong roots contain approximately 40–60 kg nitrogen equivalent per acre — this organic nitrogen becomes available to the next crop within 4–6 weeks of decomposition. Plan your crop rotation so that a nitrogen-hungry crop like maize, jowar, or vegetables follows moong.

Income summary:

• Dry seed: 400–500 kg/acre × ₹90/kg organic = ₹36,000–45,000
• Green pod (optional): 800 kg × ₹30/kg = ₹24,000
• Input cost: ₹6,000–8,000/acre (bio-inputs + labour)
• Net income: ₹25,000–50,000/acre in 45–65 days

Last updated: March 2026