Agricultural Gypsum

Below is a detailed and structured overview of Agri-Gypsum
 (Agricultural Gypsum) covering the following sections:

Guaranteed Analysis (Composition)
Component Guaranteed Minimum (%)
Calcium (Ca) 20–23%
Sulfur (S) 15–18%
Calcium Sulfate Dihydrate (CaSO₄·2H₂O) ≥95%
pH (in water) 6.5–8.0
Free Moisture 1% max
Chemical & Physical Properties
Property Description
Chemical Name Calcium Sulfate Dihydrate
Chemical Formula CaSO₄ · 2H₂O
Molar Mass 172.17 g/mol
Appearance White to off-white granules or powder
Solubility in Water Slightly soluble (~2 g/L at 20°C)
Bulk Density ~0.8–1.0 g/cm³ (varies with particle size)
Particle Size Typically 4–8 mesh (granular form)
Odor Odorless
CAS Number 10034-76-1
HS Code 25201010
EINECS Number 231-900-3
Technical Data / Application Information

Soil Amendment Benefits Recap:
Supplies calcium (Ca²⁺) and sulfur (SO₄²⁻) — essential plant nutrients.
Replaces exchangeable sodium (Na⁺) in sodic soils.
Enhances soil structure , water infiltration , and root development .

Application Rates (General Guidelines)
Soil Type / Purpose Recommended Rate (tons/acre)
Sodic soil reclamation 1–5 tons/acre
Nutrient supplementation 0.5–1 ton/acre
Horticulture & high-value crops 0.25–1 ton/acre
Turf & lawn care 50–100 lbs/1000 sq ft
Summary Table
Parameter Value / Description
Main Constituent Calcium Sulfate Dihydrate
Calcium (Ca) 20–23%
Sulfur (S) 15–18%
pH 6.5–8.0
Solubility Low (slightly soluble in water)
Form Granules or Powder
Application Method Broadcast, incorporated into soil
Target Soils Clay, sodic, acidic subsoils
Crop Compatibility Wide range including corn, soybeans, fruits
Environmental Impact Eco-friendly, reduces nutrient runoff
Packaging & Handling
  • Available in:
  • Bulk bags (1 MT)
  • 25-50 kg PP bags / paper bags
  • Easy to apply using standard fertilizer spreaders.
  • Non-hazardous; safe to handle and store.

Benefits of Agri-Gypsum (Agricultural Gypsum)

Agri-gypsum, or agricultural gypsum, is a soil amendment made from calcium sulfate dihydrate (CaSO₄·2H₂O). It has been used for centuries to improve soil structure and fertility. Here are the key benefits of using agri-gypsum in agriculture:

Improves Soil Structure
  • Helps break up compacted soils, especially clay soils.
  • Enhances soil aggregation, which improves root penetration, water infiltration, and aeration.
  • Reduces crusting and surface sealing, allowing better seed emergence.
Adds Calcium and Sulfur to the Soil
  • Supplies essential plant nutrients: calcium (Ca) and sulfur (S) .
  • Calcium plays a vital role in cell wall development, nutrient uptake, and disease resistance.
  • Sulfur is important for protein synthesis and enzyme function in plants.
Remediates Sodic (Alkali) Soils
  • Replaces exchangeable sodium (Na⁺) in sodic soils with calcium (Ca²⁺).
  • This helps reduce soil alkalinity and toxicity, improving crop growth.
  • Enhances leaching of excess sodium through improved soil permeability.
Enhances Water Infiltration and Drainage
  • Improves soil porosity and reduces runoff and erosion.
  • Allows water to penetrate deeper into the soil profile, reducing surface ponding.
Reduces Aluminum Toxicity in Acid Soils
  • In acidic subsoils where aluminum (Al³⁺) is toxic to roots, gypsum can help reduce its availability.
  • Calcium from gypsum displaces aluminum ions, making them less harmful to plants.
Increases Nutrient Availability
  • Balances cation exchange capacity (CEC), helping soil hold and release nutrients more efficiently.
  • Can enhance the uptake of nitrogen, phosphorus, and potassium by plants.
Supports Microbial Activity
  • Promotes healthy soil microbial populations by improving soil conditions.
  • Encourages decomposition of organic matter and nutrient cycling.
Improves Crop Yield and Quality
  • Leads to healthier root systems and better plant development.
  • Especially beneficial for crops like corn, soybeans, peanuts, potatoes, tomatoes, and alfalfa.
Environmentally Friendly
  • Non-toxic and safe to handle.
  • Helps reduce nutrient runoff (especially phosphorus) by binding it in the soil.
  • Can reduce losses of nitrogen and other nutrients to groundwater.
Cost-Effective Soil Amendment
  • Often more affordable than lime when considering both calcium and sulfur content.
  • Offers long-term soil improvement benefits with relatively low application cost.
 ​Technical datasheet (TDS)

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