Green Gram Cultivation Guide: High Yield Moong Farming

Green Gram, known as Moong or Mung bean, is one of the most widely grown pulse crops in India. It is valued for its high protein content, easy digestibility, and short growth cycle, which allows it to fit into intensive crop rotations. Moong can be cultivated as a Kharif crop during the monsoon, or as a Summer crop on fallow lands after the harvest of Rabi crops like wheat, mustard, or potato. This versatility makes it an excellent choice for farmers looking to maximize their land use and improve soil health through biological nitrogen fixation. It can also be grown in Rabi in southern coastal tracts.

Sowing Seasons: Summer versus Kharif Moong

One of the key advantages of Moong is its suitability for multiple seasons. Summer Moong is grown after harvesting wheat or mustard, usually from mid-March to mid-April. This crop utilizes the residual moisture and the warm, clear days of summer. Sowing must be completed on time; if summer sowing is delayed, the crop will mature during the monsoon rains, which can spoil the pods and make harvesting extremely difficult. The summer sun provides ample light, leading to good pod filling and low disease risk. Warm, drying winds in summer can quickly deplete moisture, making soil coverage very important. The short duration of summer green gram also acts as a break crop, disrupting insect pest life cycles that thrive on continuous cereal farming.

Summer Moong Sowing Specifics

For the summer crop, farmers should irrigate the field immediately after harvesting the previous crop and plough it to get a fine tilth. Sowing should be done in the afternoon hours when the soil temperature is moderate. Because summer temperatures rise quickly, keeping the sowing depth at 3 to 4 cm is crucial to keep the seeds in moist soil. If the topsoil dries out too fast, the germination rate will drop. Using a seed drill helps place the seeds uniformly and cover them with soil. Adequate moisture at sowing ensures that all seeds sprout at the same time.

Kharif Sowing Specifics

Kharif Moong is sown with the arrival of the monsoon rains, from late June to early July. This crop is mostly rainfed. While Kharif Moong requires fewer irrigations, it faces higher weed pressure and a higher risk of fungal and viral diseases due to the humid conditions. Farmers must choose their varieties and sowing times carefully based on the season they select, ensuring proper drainage channels are built to prevent root rot. Raising the field borders helps prevent runoff water from entering the crop and keeps the soil structure intact.

Climatic Requirements and Soil Selection

Moong is a warm-season crop that requires temperatures between 25 and 35 degrees Celsius for optimum growth. It can tolerate high temperatures during its vegetative phase, but extreme heat exceeding 40 degrees Celsius during flowering can cause flower drop and poor pod filling. The crop is highly sensitive to frost and waterlogging at all stages of growth. A dry climate during harvesting is essential for good seed quality.

Well-drained loamy or sandy loam soils with a pH between 6.0 and 7.5 are ideal for Moong cultivation. The crop does not tolerate saline or alkaline soils, as they restrict root nodule development. Field levelling is critical, especially for the Kharif crop, to prevent water logging in low-lying areas. The land should be ploughed twice and followed by planking to create a fine and firm seedbed. A level field also ensures uniform distribution of moisture and prevents water pooling.

Key Green Gram Varieties for Indian Farmers

Several high-yielding and disease-resistant varieties of Moong have been developed for Indian farmers. IPM 02-3, commonly known as Samrat, is a highly popular short-duration variety that matures in 60 to 65 days. It is resistant to the Yellow Mosaic Virus (YMV) and is suitable for both summer and Kharif sowing. Another excellent variety is Virat, which matures in just 55 to 60 days and has synchronous maturity, meaning all pods ripen at the same time, making harvesting easier.

SML 668 is a bold-seeded variety that is widely grown in northern India during the summer season. Other notable varieties include PDM 139, MH 125, and Ganga 8. These varieties offer high yields and resistance to major pests and diseases. Farmers should select varieties certified by state seeds corporations or recommended by the nearest Krishi Vigyan Kendra to ensure good germination and high performance. Choosing certified seeds helps reduce the risk of seed-borne viral infections.

Seed Treatment and Inoculation Steps

Seed treatment is a critical first step to ensure a healthy plant stand. To protect the seeds from soil-borne fungi that cause seedling blight and root rot, treat the seeds with Carbendazim or Thiram at the rate of 2 grams per kg of seed, or use Trichoderma viride at the rate of 4 to 5 grams per kg of seed. This treatment must be done before applying bio-fertilizers.

Following the fungicide treatment, the seeds should be inoculated with Rhizobium phaseoli and Phosphate Solubilizing Bacteria (PSB) cultures. Dissolve 50 grams of jaggery in 500 ml of warm water and let it cool. Add 200 grams of Rhizobium culture and 200 grams of PSB culture to this solution, then mix it with 10 kg of seed. Spread the seeds on a clean sheet in shade to dry for 30 minutes before sowing. Inoculation ensures early root nodule development, which helps the crop fix atmospheric nitrogen efficiently.

Sowing Spacing and Seed Rates

Seed rate and spacing vary depending on the growing season. For Kharif Moong, the recommended seed rate is 12 to 15 kg per hectare. Sowing is done at a spacing of 30 cm between rows and 10 cm between plants within the row. Sowing should be done in lines using a seed drill to ensure uniform depth and spacing.

For Summer Moong, a higher seed rate of 20 to 25 kg per hectare is recommended. This is because summer plants have a shorter growth period and smaller canopies, so a higher plant density is required to achieve high yields. Summer Moong is sown at a narrower spacing of 22.5 cm between rows and 10 cm between plants. The seed depth should be kept at 3 to 4 cm to ensure uniform germination and prevent seed exposure to birds.

Nutrient and Water Management Plan

Moong requires less nitrogen than cereals, but it needs a starter dose of nitrogen during sowing to support the young plants before root nodules begin fixing nitrogen. Phosphorus is essential for root growth and energy transfer in the plant. Phosphorus is absorbed mostly through diffusion, which requires optimal soil moisture. In dry soils, root growth slows down, preventing the plant from reaching phosphorus deposits. This makes phosphorus application close to the root zone essential.

An indicative fertilizer dose is 15 to 20 kg Nitrogen, 40 kg Phosphorus, and 20 kg Potash per hectare, applied as a basal dose in the sowing furrows. Farmers must consult their Soil Health Cards to adjust these rates. For Summer Moong, irrigation is critical. The crop requires 3 to 5 irrigations depending on the weather. The first irrigation is given 20 to 25 days after sowing, and subsequent irrigations are spaced 10 to 12 days apart. Avoid irrigating the crop during peak flowering, as it can cause flower drop.

Foliar Sprays for Yield Enhancement

Foliar feeding is highly effective in short-duration pulses like Moong. Spraying a 2 percent solution of Urea or DAP (Di-Ammonium Phosphate) during the flowering and pod formation stages provides a quick nutrient boost to the plants. This spray helps in reducing flower drop and increases the number of pods per plant. To prepare the solution, dissolve 2 kg of DAP in 100 litres of water overnight, filter the supernatant liquid, and spray it using a knapsack sprayer. This practice is especially useful in dry rainfed areas where root nutrient uptake is slow due to low soil moisture. It ensures that the crop receives nutrients directly through the foliage when soil transport is limited.

Weed Control and Crop Maintenance

Weeds can cause significant yield losses in Moong, especially during the first 25 to 30 days of growth. One hand weeding at 15 to 20 days after sowing, followed by a second weeding 15 days later, is recommended to keep the field clean. Hand weeding helps maintain soil loose and crumbly around the young shoots. Weeds like Trianthema portulacastrum and Cyperus rotundus grow extremely fast and can cover the ground within two weeks of monsoon rains, choking young Moong seedlings. Hand pulling is effective but requires significant labour and should be done before the weeds start flowering and dispersing seeds.

If labour is scarce, a pre-emergence herbicide like Pendimethalin can be sprayed at the rate of 1.0 kg active ingredient per hectare within 24 to 48 hours of sowing. This controls the germination of broad-leaved and grassy weeds. Keeping the field weed-free during the initial phase allows the crop to establish a dense canopy, which naturally suppresses late-emerging weeds.

Integrated Management of Yellow Mosaic Virus

Yellow Mosaic Virus (YMV) is the most destructive disease affecting Moong. The symptoms include bright yellow patches on the leaves, which can spread until the entire leaf turns yellow. The disease reduces photosynthesis, leading to stunted plant growth and poor pod development.

YMV is transmitted from infected plants to healthy plants by whiteflies (Bemisia tabaci). Controlling the disease requires managing this insect vector. Farmers should grow YMV-resistant varieties like Samrat or Virat. Install yellow sticky traps in the field at the rate of 15 to 20 traps per acre to capture adult whiteflies. If whitefly populations increase, spray recommended systemic insecticides or neem-based formulations early in the morning.

Understanding the Whitefly Vector

Whiteflies are small, sap-sucking insects that thrive in dry and warm weather. They feed on the underside of leaves, sucking plant juices and excreting honeydew, which leads to black sooty mould growth. Since they act as carrier hosts for YMV, even a small population of whiteflies can infect a large field. Eliminating host weeds around the field boundaries before sowing helps prevent whiteflies from finding early shelter. Intercropping Moong with border rows of tall crops like maize or pearl millet can also act as a physical barrier, preventing whiteflies from flying into the Moong crop. The barrier crops disrupt the flight patterns of the insect, keeping the main field safe.

Other Major Pests and Powdery Mildew

Powdery mildew is another common disease, particularly in the Kharif season when humidity is high. It appears as white, powdery spots on leaves and stems, which can cause the leaves to dry and fall prematurely. This disease can be managed by spraying wettable sulphur or recommended systemic fungicides.

Common insect pests include thrips, aphids, and pod borers. Thrips feed on flowers, causing them to drop, while pod borers damage the seeds inside the pods. Regular field monitoring is essential. Applying neem seed kernel extract (NSKE) at 5 percent concentration is a good preventive measure, while chemical sprays should be used only as a last resort when pest populations cross the economic threshold levels. Farmers should also protect fields from grazing animals.

Harvesting, Threshing, and Storage Tips

Moong pods should be harvested when 80 percent of them turn black or dark brown. In many older varieties, pod ripening is not uniform. In such cases, manual picking of major grain-filled pods in 2 to 3 rounds is recommended to avoid yield loss due to pod shattering. Delaying the picking causes pods to dry too much, making them crack open under the sun.

For modern varieties that ripen uniformly, the entire plant can be cut close to the ground using sickles, dried in the sun for 3 to 4 days, and threshed. Threshing is done by beating the dry plants with sticks or using mechanical threshers. The cleaned grains must be dried in the sun until their moisture content is below 9 percent before storage. High moisture leads to quick damage by stored grain pests like the pulse beetle. Under good management, Summer Moong yields about 10 to 12 quintals per hectare, while Kharif Moong yields 8 to 10 quintals per hectare. Farmers should check prices at local mandis to ensure profitable sales.

Frequently asked questions

What are the main seasons for growing Moong in India?

Moong is grown during the Kharif season (monsoon onset) and the Summer/Zaid season (mid-March to mid-April) across most parts of the country.

Why is the seed rate higher for Summer Moong?

Summer Moong has a shorter growth cycle and smaller plant size, so a higher seed rate (20-25 kg/ha) is used to maintain optimal plant population.

What is Yellow Mosaic Virus and how does it spread?

Yellow Mosaic Virus is a disease that causes yellow spots on Moong leaves. It is spread by the whitefly vector.

How can I control whiteflies in my Moong crop?

Use yellow sticky traps, grow resistant varieties, and spray systemic insecticides or neem oil during the early stages of infestation.

How many days does green gram take to mature?

Green gram is a very fast-growing crop, maturing in about 55 to 75 days depending on the variety and sowing season.

What is the role of Rhizobium seed treatment in Moong?

Rhizobium bacteria form nodules on the roots that fix atmospheric nitrogen, reducing the need for chemical nitrogenous fertilizers.

How many irrigations does Summer Moong require?

Summer Moong requires 3 to 5 irrigations, spaced 10 to 12 days apart. The first irrigation is given 20 to 25 days after sowing.

Can Moong tolerate waterlogged soils?

No, Moong is highly sensitive to waterlogging. It is crucial to have proper drainage channels to prevent water accumulation.

What are some YMV-resistant Moong varieties?

Popular resistant varieties include IPM 02-3 (Samrat), Virat, and SML 668.

What are the symptoms of powdery mildew in green gram?

Powdery mildew appears as white, powdery spots on leaves and stems, which can spread and cause leaf shedding.

When is the right time to harvest Moong pods?

Harvest when about 80 percent of the pods turn brown or black. Delaying harvest can cause pod shattering.

What is pod shattering in pulse crops?

Pod shattering is the splitting open of dry pods, which spills the seeds on the ground and causes yield loss.

What is the recommended fertilizer dose for Moong?

An indicative dose is 15 to 20 kg Nitrogen, 40 kg Phosphorus, and 20 kg Potash per hectare. Refer to Soil Health Cards for exact rates.

What is the ideal soil pH for growing Moong?

Moong grows best in loamy soils with a neutral pH range of 6.0 to 7.5.

What is the average yield of Moong per acre?

Indicative yield is 4 to 5 quintals per acre for Summer Moong and 3 to 4 quintals per acre for Kharif Moong.