Evaluation of soil radioactivities using pedologically based sampling techniques.


A new type of soil sampling protocol is suggested which has applicability to surveys of environmental radioactivity. Often there is a higher concentration of radionuclides in the lower B horizon than in the upper A horizon of well-drained, well-developed soils. It is recommended that soils be sampled pedologically, i.e., by soil horizon, rather than incrementally in depth. An example is given from a site in northern Louisiana where surface and/or the classical 15 cm ("six-inch") deep sampling could lead to erroneous conclusions regarding anthropogenic contamination.


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