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Science 11 March 1960:
Vol. 131. no. 3402, pp. 727 - 728
DOI: 10.1126/science.131.3402.727
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Articles

Natural Radioactivity of Miami Soils

David Telfair 1, Robert Garrison 1, and Carl Smith 1

1 Earlham College, Richmond, Indiana

An important part of man's radioactive environment is the natural radioactivity of soils. This radioactivity varies with soil type and withdepth in the soil profile. The relation between gross gamma activity and soil depth for a particular soil (Miami silt loam) is presented, together with a discussion of the contribution of K40 and the uranium and thorium series and of the effects of fallout from bomb tests in increasing the radioactivity of a thin layer of surface soil.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)