An automated system and method for optimizing irrigation, whereby different parts of a field are irrigated different amounts. The level of irrigation is based at least in part on an analysis of spatial soil properties of the field, and extrapolation of data from soil sensors placed in the different parts of a field. Inputs into the system include a topographical input and an electromagnetic input describing topographical features and soil conductivity (respectively) of the area to be irrigated. The inputs are used to create a Topography Integrated Ground watEr Retention (TIGER) map. The map is then utilized by an irrigation control subsystem to provide irrigation to the area, wherein different amounts of water can be provided to different regions within the area to provide efficient and effective irrigation.
