How to Use Gypsum in Clay Soil | DoItYourself.com
Because gypsum is easily pulverized it can be converted to a powder that mixes easily in other soils, even clay. Gypsum, unlike lime, is able to neutralize salts as well as acids in the soil, which means better soil balance and healthier plants. Step 1: Site Preparation. Before organic gypsum is used, the site needs to be prepared.