Land Plaster

Sustainable crop application to build better soils and improve plant growth
  • High calcium and sulfate sulfur analysis
  • Contains about 8 to 11% moisture
  • Screened prior to loading
  • Suitable for peanut production and for soil improvement
  • Sold in bulk from the “DuPont” James River Facility, Richmond, Virginia

Progyp is the highest purity (99%) Gypsum available for the agricultural industry. Gypsum is a sulfate mineral composed of Calcium Sulfate Dihydrate with the chemical formula CaSO4•2H2
O. It’s a chemically-reacted product, manufactured at a 100% dedicated, state-of-the-art synthetic gypsum operation using the highest purity ingredients. It guarantees production of the highest purity and quality Calcium Sulfate Dihydrate available to the agricultural industry. It’s the only fertilizer product that provides key nutrients and improves soil physical and chemical properties – “A Soil and Plant Fertility Product.”

Photo of land plaster from a manufacturer in richmond va

Chemical Name

Calcium Sulfate Dihydrate (CaSO4-2H2O)

Common Names


Calcium Sulfate

Land Plaster


Typical Analysis:
Calcium (Ca) 24%

Sulfur (S) 19%

Calcium Sulfate Dihydrate (99%)

Calcium Sulfate (85%)

General Properties

Appearance: Fine particles, off-white/white

Odor: None

Bulk Density: 81 (loose)/99 (packed) lb/ft3

Specific Gravity: 2.32-2.96

Screened: 100% less than 4 mesh

Moisture: 8-12%

pH: 6.4


  • Safe to use in all soil and plant applications
  • Highest purity (99%) product available
  • High level of Ca and S
  • Fine particle size/high surface area
  • Dust free
  • Screened to improve:
  • Product uniformity
  • Handling properties
  • Spreadability
  • Highly available form of Ca and S
  • Water-soluble
  • 200X more soluble than limestone
  • Solubilizes and moves into soils faster than calcium sulfate anhydrite and limestone
  • Readily taken up by soil and plants
  • Cost effective way of providing Ca and S
  • Improves soil physical and chemical properties
  • Reduces compaction, erosion, leaching, and runoff
  • A source of S that doesn’t burn crops
  • Promotes retention and uptake of nutrients
  • Improves plant growth
  • Helps reclaim degraded and high Na, Al, and Mg soils
  • Improves disease resistance

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