_:b1217727 "Gypsisols are soils with substantial secondary accumulation of gypsum (calcium sulfate). These soils are found in the driest parts of the arid climate zone."^^ . _:b1217727 . _:b1217727 . _:b1217727 "FAO:http://fao.org/ag/agl/agll/wrb/doc/wrb2006final.pdf"^^ . _:b1217727 .