Figure 6. Aerial photo showing chlorosis and N deficiency stress in soybean (Fig. 3a). Slope of the soil surface visualized in red (Fig. 3b) show the likely location of seep hydrology where slope is greatest (i.e. areas of dark red). Areas of high slope (dark red from 6b) overlayered on the soybean aerial image (6a) correlate well with regions of crop stress (Fig. 6c).