Arable Acres GS95 Gypsum Solution Grade - Calcium Sulfate Dihydrate 95% - Calcium 22% - Sulfur 17% - Organic Certified
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GRAA007 Arable Acres GS95 Gypsum Solution Grade - Calcium Sulfate Dihydrate 95% - Calcium 22% - Sulfur 17% - Organic Certified - 50 Pound (960/Truckload)
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GRAA006 Arable Acres GS95 Gypsum Solution Grade - Calcium Sulfate Dihydrate 95% - Calcium 22% - Sulfur 17% - Organic Certified - 2,000 Pound (24 Supersacks/Truckload)
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GRAA005 Arable Acres GS95 Gypsum Solution Grade - Calcium Sulfate Dihydrate 95% - Calcium 22% - Sulfur 17% - Organic Certified - 50,000 Pound (Bulk Truckload)
Details
Arable Acres GS95 Solution Grade Gypsum is a high-purity, mined calcium sulfate dihydrate (CaSO₄ • 2H₂O) formulated for agricultural application as a soil amendment. It contains 95% calcium sulfate dihydrate, providing 22% calcium (Ca) and 17% sulfur (S) by weight. The product is derived from mined gypsum and is acceptable for use in organic production in accordance with the National Organic Program (NOP) Standards.
Chemical Composition and Purity
Elemental analysis of the 325-mesh formulation provides the following concentrations in parts per million (mg/kg):
| Element | Concentration (ppm) | Element | Concentration (ppm) |
|---|---|---|---|
| Calcium (Ca) | 225,787.00 | Magnesium (Mg) | 5,243.16 |
| Sulfur (S) | 173,901.00 | Manganese (Mn) | 205.61 |
| Silicon (Si) | 1,268.44 | Strontium (Sr) | 1,982.42 |
| Aluminum (Al) | 1,708.86 | Potassium (K) | 987.71 |
| Iron (Fe) | 1,454.60 | Phosphorus (P) | 101.71 |
| Boron (B) | 157.11 | Sodium (Na) | 344.47 |
| Barium (Ba) | 27.52 | Titanium (Ti) | 78.63 |
| Lithium (Li) | 24.23 | Vanadium (V) | 2.15 |
| Zinc (Zn) | 15.96 | Copper (Cu) | 1.73 |
| Lead (Pb) | 2.20 | Chromium (Cr) | 1.09 |
| Nickel (Ni) | 0.82 | Cobalt (Co) | 0.76 |
| Molybdenum (Mo) | 1.26 | Chloride (Cl) | 94.85 |
| Cadmium (Cd) | 0.13 | Tin (Sn) | <5.00 |
| Arsenic (As) | <0.50 | Selenium (Se) | <0.50 |
| Mercury (Hg) | <0.15 | Silver (Ag) | <0.10 |
Calcium sulfate dihydrate equivalent is calculated at 97.0% based on calcium content and 93.4% based on sulfur content.
Functional Mechanism in Agriculture
Solution grade gypsum serves two primary nutritional functions in crop production: supplying soluble calcium and soluble sulfur. Unlike agricultural lime (calcium carbonate), gypsum does not alter soil pH, making it suitable for use in neutral or alkaline soils where calcium is deficient but pH adjustment is undesirable.
Calcium plays a critical role in cell wall structure, membrane integrity, and enzyme activation. Deficiency manifests as blossom end rot in fruiting vegetables, tip burn in leafy greens, and general root tip dieback. Because calcium is immobile in the phloem, deficiencies appear in young tissues and growing points regardless of soil levels.
Sulfur is a component of three essential amino acids (cysteine, cystine, and methionine) and is required for chlorophyll synthesis. Sulfur deficiency presents as uniform yellowing of young leaves, often mistaken for nitrogen deficiency but without the lower-leaf progression characteristic of nitrogen stress.
Soil Physical Effects
In addition to nutritional delivery, soluble gypsum flocculates clay particles. When calcium ions displace sodium or magnesium on clay exchange sites, the clay platelets aggregate into larger particles, creating macropores that improve water infiltration, aeration, and root penetration. This effect is most pronounced in sodic soils (high exchangeable sodium percentage) but occurs to a measurable degree in any fine-textured soil. The sulfate component also complexes with excess aluminum in acid subsoils, reducing aluminum toxicity.
Application Specifications and Protocol
Application Rate: 500 lbs per acre as a standard broadcast rate.
Available Configurations:
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50 lb bag (960 bags per truckload)
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2,000 lb supersack (24 supersacks per truckload)
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50,000 lb bulk truckload
Particle Size: Available in 325-mesh formulation for rapid solubility and suspension in liquid application systems.
Storage and Handling
Store in a dry location. The product is hygroscopic and will harden or cake when exposed to high humidity or direct moisture.