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Long–term supply of calcium and sulphur for potting mixes

Documented research indicates that sulphur and calcium can be leached from free draining soil mediums, such as potting mixes. This will prevent the optimum growth of plants.
   
In areas where irrigation water contains little calcium or sulphur, plants growing in free draining mixes need an additional source of these two important nutrients. Superphosphate will supply calcium and sulphur, however the sulphur can be quickly lost in drainage water. This is also the case with other fertilizers, including fine gypsum products.
      
C.S.I.R.O. research has shown that crushed rock gypsum with a particle size of 1 to 4mm will provide a constant supply of calcium and sulphur to the growing plant for at least six months.
      
P.G.P. Australia produces a premium grade gypsum product, Nursery-Gyp^®, to meet this requirement. Nursery-Gyp^® is available in 20kg and 40kg bags.
    

High grade gypsum for the cement & plasterboard industry

Our minus 40mm, high grade stone is ideal for milling and is currently supplied to a number of manufacturers of Portland cement within Australia. 
    
The high purity and low chloride levels is attractive to manufacturers of cement. With very good access to the Port of Adelaide and major arterial routes for road freight, supply and delivery is cost effective. 
   
The product is quality assured. Sampling occurs daily and testing by an accredited lab is conducted weekly.

Analysis of Nursery-Gyp^®
      

Analysis of 'Cement Grade' gypsum
     

93%
21.6%
17.3%
 0.03%
 0.5%
95%

Purity  (CaS04.2H20)
Calcium  (Ca)
Sulphur  (S04)            
Sodium  (Na)              
Free Moisture            

94%
21.9%
17.4%
 0.03%
 0.5%

     
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