Fig. 6From: Remotely sensed estimation of total iron content in soil with harmonic analysis and BP neural networkValidation models of TICS estimation of different types of soil: a FD-BP model of loessial soil; b WPT-FD-BP model of loessial soil; c WPT-FD-HA-BP model of loessial soil; d FD-BP model of sandy soil; e WPT-FD-BP model of sandy soil; f WPT-FD-HA-BP model of sandy soil; g FD-BP model of mixed soil; h WPT-FD-BP model of mixed soil; i WPT-FD-HA-BP model of mixed soilBack to article page