GYPSOIL increases soil permeability to water. Soils will soak up rainwater faster and deeper, even in heavy rains. Growers often see improved water infiltration after just one application. Research trials have shown results to support these observations. A USDA-ARS study measured water infiltration of nearly two inches per hour in a test plot where gypsum was applied versus just a half an inch per hour in a control plot where no gypsum was applied.
Calcium (% Base Saturation) USDA-ARS National Soil Erosion Research Laboratory