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Natural Uranium and Thorium Distributions in Podzolized Soils and Native Blueberry

^a Usda/Nrcs, Durham, Nh 03824-2043
^b Geology Dep., Univ. of Wisconsin-Parkside, Kenosha, WI 53141-2000
^c Dep. of Plant Biology, Univ. of New Hampshire, Durham, NH 03824

View larger version (12K): [in a new window]   Fig. 1. Diagrammatic representation of soil sampling scheme. Circles represent locations of random samples. Coring depth through horizons is represented as a cylinder in foreground.

View larger version (21K): [in a new window]   Fig. 2. Concentrations of U and Th in AE (surface horizons) and Bs (subsurface horizons) at Hurricane Mountain and Red Eagle Pond.

View larger version (21K): [in a new window]   Fig. 3. Concentration ratios (CRs) of leaves and stems based on AE horizons. Values for CR have been multiplied by 104 (i.e., actual CR values were no larger than 0.080).

View larger version (21K): [in a new window]   Fig. 4. Concentration ratios (CRs) of leaves and stems based on Bs horizons. Values for CR have been multiplied by 104 (i.e., actual CR values were no larger than 0.055).

View larger version (23K): [in a new window]   Fig. 5. Regression plot of leaf and stem CRs of Th vs. Th concentration (upper) and CRs of U vs. U concentration (lower) in AE horizons.

View larger version (16K): [in a new window]   Fig. 6. Regression plot of U CRs (upper) and Th CRs (lower) in leaves versus stems. Ratios are based on soil concentrations in AE horizons.

View larger version (22K): [in a new window]   Fig. 7. Concentration ratios of U (upper) and Th (lower) in leaves and stems versus soil concentrations of U and Th. Ratios are based on soil concentrations in Bs horizons.

View larger version (16K): [in a new window]   Fig. 8. Correlation of leaf and stem CRs for U (upper) and Th (lower). Ratios are based on soil concentrations in Bs horizons.