Conventional statistics and geostatistical techniques were used to study the spatial variability and temporal stability of soil salinity distribution on a 10.5 hm~2 field in reclaimed region of Shangyu city

Zhejiang province. Based on the spatial and temporal characteristics of soil salinity

a classified management map was produced with the support of GIS. The results indicated high coefficients of variation of topsoil salinity over all the three samplings. The spatial structure of soil salinity variability remained relatively stable with time. Kriged contour maps revealed the high salinity content in the east region and relatively low salinity level in the northern and west region of the studied field. Temporal stability map indicated the stable and unstable regions. The classified management maps presented 4 potential management zones

each with different characteristics that can have an impact on the way the field is managed. Finally

the cotton yield data was used to examine how well these potential management zones reflected the productivity levels. It was concluded that saline soil land might be managed in a site-specific way based on the clearly defined management zones.