Traditional methods of generating soil information on the field scale have involved the design and adoption of soil sampling regimes and laboratory analysis. Due to the time consuming nature of this approach only limited soil information can be collected. Nevertheless, soil maps are generated and inferences about the spatial distribution of soil properties, and soil condition etc. are made from this cursory information. Unfortunately, the use of such maps leads to errors in interpretation and possibly soil management. In more specific investigations such as soil salinity assessment and determination of irrigation\drainage efficiency more detailed quantitative soil information is required, in order to provide the necessary information to manage soil salinity or related problems.