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Fig. 1. Locations of 18 soil series sampled throughout Alaska, Oregon, Puerto Rico, and Washington. Each series included three representative profiles for a total of 54 profiles (n = 3 for each series). Series name and profile number are represented by a letter and number designation. For example, the first Athena series profile is labeled At1, the second profile is labeled At2, etc. Map units for each series are listed at the top left. Maps not drawn to scale.
