_:b1217721 . _:b1217721 "FAO:http://fao.org/ag/agl/agll/wrb/doc/wrb2006final.pdf"^^ . _:b1217721 "Calcisols are soils in which there is substantial secondary accumulation of lime. Calcisols are common in highly calcareous parent materials and widespread in arid and semi-arid environments."^^ . _:b1217721 . _:b1217721 .