Gypsum or aqueous calcium sulfate is a valuable and inexpensive corrective material that has been used in recent years to reduce the salinity of soil in gardens and fields.
What are the features of agricultural plaster?
A good plaster for agriculture should be free of salt and its lime percentage should be low.
This means that its salt should be less than 2ds/m and its lime percentage should be below 2%.
The calcium to magnesium ratio is higher than 70 to 1
The amount of pebbles and rubbles is in the least of possible
Amount .the most important difference between agricultural gypsum and building plaster is the rawness of agricultural gypsum .the corrective material is known as Ardeh among miners and farmers.