Liquid "Gypsum" is a soil conditioning product from the company Soil Logic. Liquid "Gypsum" comes in a bottle as a spraying application to improve the quality and usability of soil. Liquid "Gypsum" contains calcium chloride as its main ingredient, while dry agricultural gypsum consists of calcium sulfate.
According to the Soil Logic website, Liquid "Gypsum" has its advantages when compared to dry gypsum. Liquid "Gypsum" is more easily applied because it can just be sprayed on the surface of soil, whereas dry gypsum requires more time and manual labor with the required tilling. The amount of calcium in just 1 quart of Liquid "Gypsum" is equivalent to the usable calcium content in 200 pounds of dry gypsum.