Gypsum: an old product with a new use | Integrated Crop …
Gypsum is used to add large amounts Ca 2 + ions that displace the Na+ ions from the exchange sites, and when flushed with clean water both salts and Na are removed from the soil (gypsum is used instead of limestone because of higher solubility and no increase in soil pH). However, even in these sites this practice is not effective when subsoils ...
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