摘要：In this study, soil samples were collected from typical arable lands in Liaoning Province. The location of soil samples was recorded by GIS coordinates. Soil pH was determined and compared with the record in 1980. Results showed that soil pH generally decreased with years, from 7.08 to 6.59 between 1980 and 2008. Areas with soil pH below 6.5 increased. The reduction of soil pH varied with soil types. The eolian sandy soil had the lowest soil pH, followed by brown soil, meadow soil and paddy soil. The eolian sandy soil, acidic and slightly acidic soil accounted for 90%, 91.8% and 90.7% in the corresponding soil types, respectively.
