Desodification of salt-affected agricultural soil using gypsum

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Salt removal effect of gypsum

Gypsum is used as a building material, fertilizer and soil conditioner, but it also has an effect on rehabilitating salt damage (desodification) of the soil in farmlands affected by seawater inflow caused by typhoon, storm surge, tsunami etc.
Salt Salt (sodium chloride) from seawater remains in the soil and affects the growth of crops. While chlorine tends to flow into water, sodium adheres to the surface of soil particles and is said to be difficult to remove with water. Therefore, desodification can be applied by exchanging sodium (ion) adsorbed by the soil from sea water with calcium (ion) from gypsum, and then turning it into an aggregate structure. This process will enable soil recovery.

Mechanism of Desodification ① (replacement of sodium with calcium)


Mechanism of Desodification ② (sodium discharge by aggregation)



To learn about the effect of desodification by applying gypsum, please refer to the guidelines and demonstration examples as follows.

Proper desodification material is required depending on the method of countermeasures against salt damage and the condition of the customer's agricultural land.
Please contact the address below for details.


Yoshino Gypsum Co., Ltd. Ceramic Sales Division
3-3-1, Marunochi, Chiyoda-ku, Tokyo, 100-0005, Japan
TEL:03-3216-2670 FAX:03-3216-2677