Gypsiferous soils widely occur in western and northern parts of arid Rajasthan, India. Two great groups of the Gypsids suborder, Petrogypsids and Haplogypsids, were recognized and their morphogenetic characteristics discussed. The Petrogypsids, which invariably occur in inter dunes surrounded by high sand dunes are characterized by a hard indurated petrogypsic horizon formed of gypsum, CaCO3 and sand cemented together. Gypsum is mostly present as hard nodules of gypsum crystals. The overlying solum is thin having low available water capacity and low fertility
Icarda handbook on soils has got a specific section. Ca Sulèhate is soluble in water and acetone precipitates it. After purification you may apply conducimetry, atomic absorption or sulphate wet chemistry. The manual is on line under Icarda+soil analysis+Ryan
Generally gypsum contents are determined through analyzing the sample for S and Ca contents for which so many methods in different books and manuals are given, even in USDA Hand Book 60. Dear Pravash Chandra Moharana have look of these books and select method you can follow base on the resources available in your laboratory.
Good question of practical nature and explained well by Guido, Raj and Sharma by giving references. Gypsiferous soils are also found in Qatar. I think, the problem has been explained well.
Your question brought my mind Xray Diffraction Technique (XRD) which is used to determine compounds of soil.
Apart from Abhishek's cited references, methods described in ML Jackson book on Soil Chemical Analysis may be referred.
By soluble soil with water and making Shaker and take 20 ml from solution and add 20 ml from acetone, after that put in centerfuge and calculate electrical conductivity… reference icarda 2016
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