Gypsum as an agricultural product | Soil Science Society of …
Gypsum that comes from coal plants is called flue-gas desulfurization gypsum, as it comes from the process that 'scrubs' sulfur out of the smoke stacks to reduce air pollution. "The gypsum that is recovered has good quality," says Dick. ... Although gypsum has been used in agriculture for more than 250 years, the benefits it provides ...
