There a database approach for soil salinity mapping and generalization from Remotely Sensed Data and Geographic Information System focusing on soil salinity , salt accumulation, image classification, soluble sodium, soluble....used Landsat TM data to formulate a dynamic process based - model to delimit processes in which the contributions of dissolved salts, surface run - off and aeolian processes, and their changes over time are evaluated ... and Na ions may have a practical value for salinity estimation. For more details consult https://www.fig.net -- resources --fig_2002

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