Pulses

The Complete Guide to Black Gram (Urad)

Advanced guide for high-yield Black Gram cultivation in the Rabi and Kharif seasons.

Pulse Grains

Introduction to Black Gram

Black Gram, or Urad dal, is a prized pulse in Indian cuisine. In Andhra Pradesh, it is primarily grown as a Rabi crop in rice fallows, utilizing the residual moisture in the soil. It is rich in phosphoric acid, proteins, and minerals.

Residual Moisture Advantage

Black Gram is uniquely suited for planting directly after rice harvest, requiring minimal irrigation and plowing if timed correctly with soil moisture levels.

Step 1: Soil & Seed Rate

Heavy soils with good water storage capacity are best suited for Black Gram, especially in rice fallows.

Detailed Process:

  1. Field Prep: For rice fallows, ensure the rice stubble is managed to allow direct sowing into residual moisture.
  2. Ploughing (if needed): For sole crops, plough 2-3 times to create a medium-fine tilth.
  3. Variety Selection: Choose high-yielding, YMV-resistant varieties like LBG 752 or PU-31.
  4. Determine Seed Rate: Prepare 20-25 kg/ha for sole cropping or 12-15 kg/ha for intercropping.
  5. Seed Treatment: treat seeds with Rhizobium and PSB culture to enhance nodulation and phosphorus uptake.

Step 2: Nutrient Management

Balanced nutrition ensures healthy plant growth and better grain development.

Detailed Process:

  1. Starter Dose: Apply a small dose of Nitrogen (20 kg/ha) to kickstart early growth.
  2. Phosphorus Application: Apply 40-50 kg/ha of P2O5 basally for strong root development.
  3. Sulfur Correction: Ensure adequate sulfur levels for protein synthesis; apply if deficient.
  4. Deficiency Check: Monitor for young leaf yellowing (Iron chlorosis) and apply Ferrous Sulfate if needed.

Step 3: Irrigation Stages

Managing moisture during critical growth stages is key to avoiding pod drop.

Detailed Process:

  1. Critical Stage 1: Ensure sufficient moisture during the "flowering" stage to prevent bloom drop.
  2. Critical Stage 2: Maintain moisture during "pod filling" to ensure plump, healthy grains.
  3. Irrigation Logic: provide 1-2 supplemental irrigations if rain fails or residual moisture depletes.
  4. Drainage Care: strictly avoid waterlogging, as Black Gram roots are highly sensitive to excess water.

Step 4: Harvest & Prep

Timely harvest prevents pod shattering and maintains the quality of the 'Urad' dal.

Detailed Process:

  1. Maturity Indicators: Harvest when 80-90% of pods turn black or dark brown.
  2. Timed Cutting: Harvest promptly to avoid natural pod shattering in the field.
  3. Curing: Sundry the harvested plants on the threshing floor for a few days.
  4. Threshing: Use a mechanical pulse thresher or manual beating to separate the seeds.
  5. Cleaning & Winnowing: Remove all chaff, small stones, and dust from the grain.
  6. Storage Conditioning: Dry the grains until they reach ~10% moisture content.
  7. Protection: Store in airtight bags; consider using neem leaves or oil treatment to prevent pulse beetles.

Pro Tip: Phosphorus Importance

Phosphorus is key to root development and nodulation in Black Gram. Apply 40-50 kg of P2O5 per hectare as a basal dose to ensure high poding and better grain weight.