Agricultural Grade Gypsum is a naturally occurring or synthetic calcium sulfate material (primarily CaSO₄·2H₂O) used as a soil conditioner and nutrient source. It supplies calcium (Ca) and sulfur (S) without significantly altering soil pH.
Unlike lime, gypsum does not neutralize soil acidity. Instead, it improves soil structure, permeability, nutrient balance, and water efficiency.
Strengthening & Soil Behavior
Soil Strengthening Mechanism:
Gypsum improves soil mechanical behavior indirectly by:
• Replacing sodium ions (Na⁺) with calcium
• Flocculating clay particles
• Improving aggregate stability
• Reducing surface crusting and compaction
Metallurgical Behavior:
🚫 No metallurgical application
🚫 Sulfur is undesirable in metal processing
Key Characteristics
✔ Neutral pH (does not raise or lower soil pH)
✔ Supplies calcium & sulfur nutrients
✔ Improves soil structure and permeability
✔ Reduces sodicity and salinity effects
✔ Environmentally safe and non-toxic
✔ Compatible with fertilizers and organic inputs
Refining & Processing Properties
Source Materials:
• Natural rock gypsum
• Gypsite
• Synthetic gypsum (FGD gypsum, treated)
Processing Steps:
• Drying
• Crushing
• Grinding
• Granulation (optional)
• Quality screening
Thermal Processing:
• No calcination required
• Used in natural hydrated form
Available Forms
• Crushed gypsum
• Powdered gypsum (<100 mesh)
• Granulated gypsum
• Pelletized gypsum
• Blended soil conditioners
Applications
Soil Improvement:
• Sodic soil reclamation
• Saline soil management
• Clay soil conditioning
• Compaction reduction
Crop Nutrition:
• Sulfur-deficient soils
• Calcium supplementation
• Oilseeds, pulses, cereals
• Horticulture & orchards
Environmental Benefits:
• Reduces phosphorus runoff
• Improves water infiltration
• Helps control soil erosion
Advantages of Agricultural Grade Gypsum
✔ Does not alter soil pH
✔ Long-lasting soil improvement
✔ Safe for repeated application
✔ Improves nutrient uptake efficiency
✔ Cost-effective bulk amendment
✔ Works synergistically with fertilizers
Agricultural Gypsum vs Lime
| Feature | Gypsum | Lime |
|---|---|---|
| pH Effect | Neutral | Raises pH |
| Sodicity Control | Excellent | Poor |
| Calcium Supply | Yes | Yes |
| Sulfur Supply | Yes | No |
| Speed of Action | Moderate | Slow |
Why Choose Agricultural Grade Gypsum?
✔ Best solution for sodic & saline soils
✔ Essential sulfur source for crops
✔ Improves water efficiency and root development
✔ Suitable for all crop systems
✔ Environmentally sustainable soil amendment