02159naa a2200265 a 450000100080000000500110000800800410001910000230006024501110008326000090019452014650020365000090166865000160167765000110169365000150170465000090171965300190172865300110174765300110175865300160176970000150178570000160180070000250181677300520184110790181997-09-30       1994    bl ---       0--  u    #d1 aFITZPATRICK, R. W.  aA soil-diagnostic key to manage saline and waterlogged catchments in the Mt Lofty Ranges, South Australia.  c1994  aDryland salinity in the Mt Lofty Ranges, South Australia has developed as a result of native vegetation being replaced with pastures that use less water. Groundwaters have risen and mobilized ions (Sodium, chloride, suphate and iron) stored within deeply weathered micaceous sandstones and  schists. Salinity resulting from sodium chloride is common in agricultural catchments around Australia, but saline sulphidic soils (with suphate and iron) have only been studied in South Australia. Salinity is also associated with waterlogging and secondary sodicity. The amelioration of dryland salinity and  watermelogging involves management of whole catchments, not just the area that is currently saline. It is imperative that all processes operating in saline catchments and their interactions are clearly understood. Salinity, waterlogging, sodicity, sulphidization and water erosion were studied in four subcatchments in the Mt Lofty Ranges. Grey (Bleached) and yellow mottles (iron depletions) or black and  red stains (iron concentrations) develop under certain conditions of water saturation, salinization, sulphidization, solidification and water erosion in surface and subsurface horizons. The amounts of these diagnostic features were used to develop a farm planning key for managing saline catchments in the Mt Lofty Ranges. Using soil diagnostic features, soil-water processes in saline catchments are easily identification by farmers and land managers.  asoil  aDiagnostico  aManejo  aSalinidade  aSolo  aDiagnostic key  aManage  aSaline  aWaterlogged1 aCOX, J. W.1 aFRITSCH, E.1 aHOLLINGSWORTH, I. D.  tSoil Use and Managementgv.10, p.145-152, 1994.