The soils wich are affected by salts are developing preferently in regions where the precipitation is limited, the temperature is high and the conditions of drainage are restricted like in some soils of Guanacaste's area. A bibliography review about some soils with high salts contents was made in Ing. Taboga, Guanacaste's area. Two soils samples was taking classified in Typic hapluster and Fluventic ustropept. There are analized with methods that caracterize the salinity of soils jour with the technics of rutinary analysis.