Introduction
- Red gram (Cajanus cajan) is a perennial legume grown as an annual, ideal for semi-arid rainfed areas with low inputs.
- In Andhra Pradesh it is Kharif‑dominant (June–July sowing; Dec–Feb harvest) and commonly intercropped to reduce risk and boost income.
- Major districts: Prakasam, Kurnool, Anantapur, Guntur and surrounding areas.
- Choose wilt and sterility mosaic disease (SMD) resistant, medium‑duration or bold‑seeded/dual‑purpose types for rainfed systems.
- Yields: commonly 12–25 q/ha with good management; hybrids can increase yields by 20–50%.
Recommended Varieties / Hybrids
- LRG 41, LRG 38 (Ranga bold), LRG 52 (Amaravathi), LRG 30 (Palnadu), LRG 133‑33 (Sowbhagya), ICPL 87119 (Asha), ICPH 2740 (hybrid), Laxmi (ICPL 85063), PRG 158, Abhaya (ICPL 332).
- Select varieties recommended by ANGRAU/ICAR for wilt/SMD tolerance and pod borer resistance where available.
Step 1: Sustainable Soil Prep
Red gram prefers well‑drained soils and tolerates marginal fertility; ideal soils include loamy, sandy loam and red/chalka soils; pH ~6.5–8.5.
Detailed Process:
- Field Clearance: Remove all weeds, stubble, and previous crop residues to prevent pest carryover.
- Summer Deep Ploughing: Conduct one deep plough (20–30 cm) during the summer to break the hardpan and enhance water infiltration.
- Tilth Management: Follow up with 2–3 harrowings or discings to obtain a fine, level seedbed.
- Moisture Engineering: In rainfed areas, form ridges and furrows (90–120 cm apart) or broad beds to conserve moisture.
- Organic Amendment: Incorporate 5–10 t/ha of FYM or compost during the final ploughing stage.
- Basal Nutrition: Apply basal fertilizers (typically 20–25 kg N and 40–50 kg P2O5/ha) based on soil test results.
- Sulfur Correction: Add 20 kg of Sulfur per hectare if your soil is found to be deficient.
Step 2: Seed Treatment
Seed treatment is the most cost-effective way to ensure a healthy stand and nitrogen fixation.
Detailed Process:
- Select Variety: Choose wilt and SMD-resistant varieties like LRG 41, LRG 52, or Asha (ICPL 87119).
- Verify Supplier: Buy only certified seeds from APSSDC, ANGRAU centers, or NSC dealers.
- Germination Test: Ensure the seed tag indicates a germination rate of 80% or higher.
- Fungal Protection: Treat seeds with fungicides (Thiram or Carbendazim at 2–3 g/kg) to prevent seed-borne diseases.
- Rhizobium Inoculation: Inoculate with Rhizobium culture (25 g/kg) to enhance nitrogen fixation in the roots.
Step 3: Sowing (Transplanting)
Correct spacing ensure each plant has enough space to branch out and produce pods.
Detailed Process:
- Precision Timing: Align sowing with the Kharif monsoon onset (usually June to mid-July).
- Sowing Technique: Dibble seeds on ridges or use a seed drill for larger fields.
- Spacing Logic: Maintain 90–120 cm between rows and 20–30 cm between plants (for sole red soils: 60-90 cm x 20 cm).
- Placement Depth: Ensure seeds are placed 4–6 cm deep for good soil contact.
- Thinning Protocol: Place 2–3 seeds per hill and thin to 1 healthy plant after 15–20 days of emergence.
- Life-Saving Irrigation: provide light irrigation if a prolonged dry spell occurs during the critical flowering or pod-filling stages.
Step 4: Harvesting Tips
Harvesting at peak maturity prevents grain shattering and ensures high-quality pigeon peas.
Detailed Process:
- Maturity Identification: Harvest when 80% of pods turn brown or straw-colored and grains are hard.
- Harvesting Method: Cut the plants manually near the base using a sickle or use a combine harvester for large plots.
- Stacking & Drying: Bundle the harvested plants and stack them upright for 2-3 days in the sun.
- Threshing: Beat the dried plants with sticks or use a mechanical pulse thresher to separate the seeds.
- Winnowing & Cleaning: Clean the grains of any chaff, stones, or dust.
- Final Conditioning: Dry the cleaned seeds until the moisture level reaches 12–14% for safe storage.
- Safe Storage: store in cool, dry, pest-proof structures to prevent bruchid infestation.
Follow ANGRAU/ICAR recommendations: use wilt/SMD resistant varieties, adopt IPM for pod borer (scouting, neem/NPV, pheromone traps), practice intercropping and moisture conservation. Contact local DAATTC, KVK or agriculture office for latest hybrids and region‑specific guidance.
Pro Tip: Seed Treatment
Always treat seeds with Rhizobium culture and Phosphorus Solubilizing Bacteria (PSB) before sowing. This ensures better nodulation and nutrient availability right from the early growth stages.