FIG. 9. (a) Picture of "blade-" and "sled-configured" prototype open-ended time domain reflectometry probes. (b) Waveforms measured with the blade probe in the field at uniform (i.e., Millville silt loam [coarse-silty, carbonatic, mesic Typic Haploxeroll]) along a 50-m transect. (c) interpreted from the blade open-ended probe reading in a nonuniformly wetted transect in the same field.