Calcium sulfate can be spread on the soil surface in order to provide sulfur and calcium to the soil for plant use as well as increasing the rate of infiltration of water and air into the soil profile. Calcium sulfate solubility is the scientific reason that it works to reduce soil particle dispersion.  Water breaks the bond easily to accomplish this. Thus, allowing surface water to infiltrate bringing oxygen with it.  Gypsum works on many soil types such as clay soil and loam soil. Research has show beneficial results for soil amending.